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41 #ifdef HAVE_SYS_TIME_H
47 #include "gromacs/commandline/pargs.h"
52 #include "gromacs/fileio/tpxio.h"
56 #include "checkpoint.h"
62 #include "gromacs/timing/walltime_accounting.h"
65 /* Enum for situations that can occur during log file parsing, the
66 * corresponding string entries can be found in do_the_tests() in
67 * const char* ParseLog[] */
73 eParselogResetProblem,
77 eParselogLargePrimeFactor,
85 int nPMEnodes; /* number of PME-only nodes used in this test */
86 int nx, ny, nz; /* DD grid */
87 int guessPME; /* if nPMEnodes == -1, this is the guessed number of PME nodes */
88 double *Gcycles; /* This can contain more than one value if doing multiple tests */
92 float *PME_f_load; /* PME mesh/force load average*/
93 float PME_f_load_Av; /* Average average ;) ... */
94 char *mdrun_cmd_line; /* Mdrun command line used for this test */
100 int nr_inputfiles; /* The number of tpr and mdp input files */
101 gmx_int64_t orig_sim_steps; /* Number of steps to be done in the real simulation */
102 gmx_int64_t orig_init_step; /* Init step for the real simulation */
103 real *rcoulomb; /* The coulomb radii [0...nr_inputfiles] */
104 real *rvdw; /* The vdW radii */
105 real *rlist; /* Neighbourlist cutoff radius */
107 int *nkx, *nky, *nkz;
108 real *fsx, *fsy, *fsz; /* Fourierspacing in x,y,z dimension */
112 static void sep_line(FILE *fp)
114 fprintf(fp, "\n------------------------------------------------------------\n");
118 /* Wrapper for system calls */
119 static int gmx_system_call(char *command)
122 gmx_fatal(FARGS, "No calls to system(3) supported on this platform. Attempted to call:\n'%s'\n", command);
124 return ( system(command) );
129 /* Check if string starts with substring */
130 static gmx_bool str_starts(const char *string, const char *substring)
132 return ( strncmp(string, substring, strlen(substring)) == 0);
136 static void cleandata(t_perf *perfdata, int test_nr)
138 perfdata->Gcycles[test_nr] = 0.0;
139 perfdata->ns_per_day[test_nr] = 0.0;
140 perfdata->PME_f_load[test_nr] = 0.0;
146 static gmx_bool is_equal(real a, real b)
148 real diff, eps = 1.0e-7;
169 static void finalize(const char *fn_out)
175 fp = fopen(fn_out, "r");
176 fprintf(stdout, "\n\n");
178 while (fgets(buf, STRLEN-1, fp) != NULL)
180 fprintf(stdout, "%s", buf);
183 fprintf(stdout, "\n\n");
188 eFoundNothing, eFoundDDStr, eFoundAccountingStr, eFoundCycleStr
191 static int parse_logfile(const char *logfile, const char *errfile,
192 t_perf *perfdata, int test_nr, int presteps, gmx_int64_t cpt_steps,
196 char line[STRLEN], dumstring[STRLEN], dumstring2[STRLEN];
197 const char matchstrdd[] = "Domain decomposition grid";
198 const char matchstrcr[] = "resetting all time and cycle counters";
199 const char matchstrbal[] = "Average PME mesh/force load:";
200 const char matchstring[] = "R E A L C Y C L E A N D T I M E A C C O U N T I N G";
201 const char errSIG[] = "signal, stopping at the next";
204 float dum1, dum2, dum3, dum4;
207 gmx_int64_t resetsteps = -1;
208 gmx_bool bFoundResetStr = FALSE;
209 gmx_bool bResetChecked = FALSE;
212 if (!gmx_fexist(logfile))
214 fprintf(stderr, "WARNING: Could not find logfile %s.\n", logfile);
215 cleandata(perfdata, test_nr);
216 return eParselogNotFound;
219 fp = fopen(logfile, "r");
220 perfdata->PME_f_load[test_nr] = -1.0;
221 perfdata->guessPME = -1;
223 iFound = eFoundNothing;
226 iFound = eFoundDDStr; /* Skip some case statements */
229 while (fgets(line, STRLEN, fp) != NULL)
231 /* Remove leading spaces */
234 /* Check for TERM and INT signals from user: */
235 if (strstr(line, errSIG) != NULL)
238 cleandata(perfdata, test_nr);
239 return eParselogTerm;
242 /* Check whether cycle resetting worked */
243 if (presteps > 0 && !bFoundResetStr)
245 if (strstr(line, matchstrcr) != NULL)
247 sprintf(dumstring, "step %s", "%"GMX_SCNd64);
248 sscanf(line, dumstring, &resetsteps);
249 bFoundResetStr = TRUE;
250 if (resetsteps == presteps+cpt_steps)
252 bResetChecked = TRUE;
256 sprintf(dumstring, "%"GMX_PRId64, resetsteps);
257 sprintf(dumstring2, "%"GMX_PRId64, presteps+cpt_steps);
258 fprintf(stderr, "WARNING: Time step counters were reset at step %s,\n"
259 " though they were supposed to be reset at step %s!\n",
260 dumstring, dumstring2);
265 /* Look for strings that appear in a certain order in the log file: */
269 /* Look for domain decomp grid and separate PME nodes: */
270 if (str_starts(line, matchstrdd))
272 sscanf(line, "Domain decomposition grid %d x %d x %d, separate PME nodes %d",
273 &(perfdata->nx), &(perfdata->ny), &(perfdata->nz), &npme);
274 if (perfdata->nPMEnodes == -1)
276 perfdata->guessPME = npme;
278 else if (perfdata->nPMEnodes != npme)
280 gmx_fatal(FARGS, "PME nodes from command line and output file are not identical");
282 iFound = eFoundDDStr;
284 /* Catch a few errors that might have occured: */
285 else if (str_starts(line, "There is no domain decomposition for"))
288 return eParselogNoDDGrid;
290 else if (str_starts(line, "The number of nodes you selected"))
293 return eParselogLargePrimeFactor;
295 else if (str_starts(line, "reading tpx file"))
298 return eParselogTPXVersion;
300 else if (str_starts(line, "The -dd or -npme option request a parallel simulation"))
303 return eParselogNotParallel;
307 /* Look for PME mesh/force balance (not necessarily present, though) */
308 if (str_starts(line, matchstrbal))
310 sscanf(&line[strlen(matchstrbal)], "%f", &(perfdata->PME_f_load[test_nr]));
312 /* Look for matchstring */
313 if (str_starts(line, matchstring))
315 iFound = eFoundAccountingStr;
318 case eFoundAccountingStr:
319 /* Already found matchstring - look for cycle data */
320 if (str_starts(line, "Total "))
322 sscanf(line, "Total %d %lf", &procs, &(perfdata->Gcycles[test_nr]));
323 iFound = eFoundCycleStr;
327 /* Already found cycle data - look for remaining performance info and return */
328 if (str_starts(line, "Performance:"))
330 ndum = sscanf(line, "%s %f %f %f %f", dumstring, &dum1, &dum2, &dum3, &dum4);
331 /* (ns/day) is the second last entry, depending on whether GMX_DETAILED_PERF_STATS was set in print_perf(), nrnb.c */
332 perfdata->ns_per_day[test_nr] = (ndum == 5) ? dum3 : dum1;
334 if (bResetChecked || presteps == 0)
340 return eParselogResetProblem;
347 /* Close the log file */
350 /* Check why there is no performance data in the log file.
351 * Did a fatal errors occur? */
352 if (gmx_fexist(errfile))
354 fp = fopen(errfile, "r");
355 while (fgets(line, STRLEN, fp) != NULL)
357 if (str_starts(line, "Fatal error:") )
359 if (fgets(line, STRLEN, fp) != NULL)
361 fprintf(stderr, "\nWARNING: An error occured during this benchmark:\n"
365 cleandata(perfdata, test_nr);
366 return eParselogFatal;
373 fprintf(stderr, "WARNING: Could not find stderr file %s.\n", errfile);
376 /* Giving up ... we could not find out why there is no performance data in
378 fprintf(stdout, "No performance data in log file.\n");
379 cleandata(perfdata, test_nr);
381 return eParselogNoPerfData;
385 static gmx_bool analyze_data(
394 int *index_tpr, /* OUT: Nr of mdp file with best settings */
395 int *npme_optimal) /* OUT: Optimal number of PME nodes */
398 int line = 0, line_win = -1;
399 int k_win = -1, i_win = -1, winPME;
400 double s = 0.0; /* standard deviation */
403 char str_PME_f_load[13];
404 gmx_bool bCanUseOrigTPR;
405 gmx_bool bRefinedCoul, bRefinedVdW, bRefinedGrid;
411 fprintf(fp, "Summary of successful runs:\n");
412 fprintf(fp, "Line tpr PME nodes Gcycles Av. Std.dev. ns/day PME/f");
415 fprintf(fp, " DD grid");
421 for (k = 0; k < ntprs; k++)
423 for (i = 0; i < ntests; i++)
425 /* Select the right dataset: */
426 pd = &(perfdata[k][i]);
428 pd->Gcycles_Av = 0.0;
429 pd->PME_f_load_Av = 0.0;
430 pd->ns_per_day_Av = 0.0;
432 if (pd->nPMEnodes == -1)
434 sprintf(strbuf, "(%3d)", pd->guessPME);
438 sprintf(strbuf, " ");
441 /* Get the average run time of a setting */
442 for (j = 0; j < nrepeats; j++)
444 pd->Gcycles_Av += pd->Gcycles[j];
445 pd->PME_f_load_Av += pd->PME_f_load[j];
447 pd->Gcycles_Av /= nrepeats;
448 pd->PME_f_load_Av /= nrepeats;
450 for (j = 0; j < nrepeats; j++)
452 if (pd->ns_per_day[j] > 0.0)
454 pd->ns_per_day_Av += pd->ns_per_day[j];
458 /* Somehow the performance number was not aquired for this run,
459 * therefor set the average to some negative value: */
460 pd->ns_per_day_Av = -1.0f*nrepeats;
464 pd->ns_per_day_Av /= nrepeats;
467 if (pd->PME_f_load_Av > 0.0)
469 sprintf(str_PME_f_load, "%12.3f", pd->PME_f_load_Av);
473 sprintf(str_PME_f_load, "%s", " - ");
477 /* We assume we had a successful run if both averages are positive */
478 if (pd->Gcycles_Av > 0.0 && pd->ns_per_day_Av > 0.0)
480 /* Output statistics if repeats were done */
483 /* Calculate the standard deviation */
485 for (j = 0; j < nrepeats; j++)
487 s += pow( pd->Gcycles[j] - pd->Gcycles_Av, 2 );
492 fprintf(fp, "%4d %3d %4d%s %12.3f %12.3f %12.3f %s",
493 line, k, pd->nPMEnodes, strbuf, pd->Gcycles_Av, s,
494 pd->ns_per_day_Av, str_PME_f_load);
497 fprintf(fp, " %3d %3d %3d", pd->nx, pd->ny, pd->nz);
501 /* Store the index of the best run found so far in 'winner': */
502 if ( (k_win == -1) || (pd->Gcycles_Av < perfdata[k_win][i_win].Gcycles_Av) )
515 gmx_fatal(FARGS, "None of the runs was successful! Check %s for problems.", fn);
520 winPME = perfdata[k_win][i_win].nPMEnodes;
524 /* We stuck to a fixed number of PME-only nodes */
525 sprintf(strbuf, "settings No. %d", k_win);
529 /* We have optimized the number of PME-only nodes */
532 sprintf(strbuf, "%s", "the automatic number of PME nodes");
536 sprintf(strbuf, "%d PME nodes", winPME);
539 fprintf(fp, "Best performance was achieved with %s", strbuf);
540 if ((nrepeats > 1) && (ntests > 1))
542 fprintf(fp, " (see line %d)", line_win);
546 /* Only mention settings if they were modified: */
547 bRefinedCoul = !is_equal(info->rcoulomb[k_win], info->rcoulomb[0]);
548 bRefinedVdW = !is_equal(info->rvdw[k_win], info->rvdw[0] );
549 bRefinedGrid = !(info->nkx[k_win] == info->nkx[0] &&
550 info->nky[k_win] == info->nky[0] &&
551 info->nkz[k_win] == info->nkz[0]);
553 if (bRefinedCoul || bRefinedVdW || bRefinedGrid)
555 fprintf(fp, "Optimized PME settings:\n");
556 bCanUseOrigTPR = FALSE;
560 bCanUseOrigTPR = TRUE;
565 fprintf(fp, " New Coulomb radius: %f nm (was %f nm)\n", info->rcoulomb[k_win], info->rcoulomb[0]);
570 fprintf(fp, " New Van der Waals radius: %f nm (was %f nm)\n", info->rvdw[k_win], info->rvdw[0]);
575 fprintf(fp, " New Fourier grid xyz: %d %d %d (was %d %d %d)\n", info->nkx[k_win], info->nky[k_win], info->nkz[k_win],
576 info->nkx[0], info->nky[0], info->nkz[0]);
579 if (bCanUseOrigTPR && ntprs > 1)
581 fprintf(fp, "and original PME settings.\n");
586 /* Return the index of the mdp file that showed the highest performance
587 * and the optimal number of PME nodes */
589 *npme_optimal = winPME;
591 return bCanUseOrigTPR;
595 /* Get the commands we need to set up the runs from environment variables */
596 static void get_program_paths(gmx_bool bThreads, char *cmd_mpirun[], char *cmd_mdrun[])
600 const char def_mpirun[] = "mpirun";
601 const char def_mdrun[] = "mdrun";
603 const char empty_mpirun[] = "";
605 /* Get the commands we need to set up the runs from environment variables */
608 if ( (cp = getenv("MPIRUN")) != NULL)
610 *cmd_mpirun = strdup(cp);
614 *cmd_mpirun = strdup(def_mpirun);
619 *cmd_mpirun = strdup(empty_mpirun);
622 if ( (cp = getenv("MDRUN" )) != NULL)
624 *cmd_mdrun = strdup(cp);
628 *cmd_mdrun = strdup(def_mdrun);
632 /* Check that the commands will run mdrun (perhaps via mpirun) by
633 * running a very quick test simulation. Requires MPI environment to
634 * be available if applicable. */
635 static void check_mdrun_works(gmx_bool bThreads,
636 const char *cmd_mpirun,
638 const char *cmd_mdrun)
640 char *command = NULL;
644 const char filename[] = "benchtest.log";
646 /* This string should always be identical to the one in copyrite.c,
647 * gmx_print_version_info() in the defined(GMX_MPI) section */
648 const char match_mpi[] = "MPI library: MPI";
649 const char match_mdrun[] = "Program: ";
650 gmx_bool bMdrun = FALSE;
651 gmx_bool bMPI = FALSE;
653 /* Run a small test to see whether mpirun + mdrun work */
654 fprintf(stdout, "Making sure that mdrun can be executed. ");
657 snew(command, strlen(cmd_mdrun) + strlen(cmd_np) + strlen(filename) + 50);
658 sprintf(command, "%s%s-version -maxh 0.001 1> %s 2>&1", cmd_mdrun, cmd_np, filename);
662 snew(command, strlen(cmd_mpirun) + strlen(cmd_np) + strlen(cmd_mdrun) + strlen(filename) + 50);
663 sprintf(command, "%s%s%s -version -maxh 0.001 1> %s 2>&1", cmd_mpirun, cmd_np, cmd_mdrun, filename);
665 fprintf(stdout, "Trying '%s' ... ", command);
666 make_backup(filename);
667 gmx_system_call(command);
669 /* Check if we find the characteristic string in the output: */
670 if (!gmx_fexist(filename))
672 gmx_fatal(FARGS, "Output from test run could not be found.");
675 fp = fopen(filename, "r");
676 /* We need to scan the whole output file, since sometimes the queuing system
677 * also writes stuff to stdout/err */
680 cp = fgets(line, STRLEN, fp);
683 if (str_starts(line, match_mdrun) )
687 if (str_starts(line, match_mpi) )
699 gmx_fatal(FARGS, "Need a threaded version of mdrun. This one\n"
701 "seems to have been compiled with MPI instead.",
709 gmx_fatal(FARGS, "Need an MPI-enabled version of mdrun. This one\n"
711 "seems to have been compiled without MPI support.",
718 gmx_fatal(FARGS, "Cannot execute mdrun. Please check %s for problems!",
722 fprintf(stdout, "passed.\n");
730 static void launch_simulation(
731 gmx_bool bLaunch, /* Should the simulation be launched? */
732 FILE *fp, /* General log file */
733 gmx_bool bThreads, /* whether to use threads */
734 char *cmd_mpirun, /* Command for mpirun */
735 char *cmd_np, /* Switch for -np or -ntmpi or empty */
736 char *cmd_mdrun, /* Command for mdrun */
737 char *args_for_mdrun, /* Arguments for mdrun */
738 const char *simulation_tpr, /* This tpr will be simulated */
739 int nPMEnodes) /* Number of PME nodes to use */
744 /* Make enough space for the system call command,
745 * (100 extra chars for -npme ... etc. options should suffice): */
746 snew(command, strlen(cmd_mpirun)+strlen(cmd_mdrun)+strlen(cmd_np)+strlen(args_for_mdrun)+strlen(simulation_tpr)+100);
748 /* Note that the -passall options requires args_for_mdrun to be at the end
749 * of the command line string */
752 sprintf(command, "%s%s-npme %d -s %s %s",
753 cmd_mdrun, cmd_np, nPMEnodes, simulation_tpr, args_for_mdrun);
757 sprintf(command, "%s%s%s -npme %d -s %s %s",
758 cmd_mpirun, cmd_np, cmd_mdrun, nPMEnodes, simulation_tpr, args_for_mdrun);
761 fprintf(fp, "%s this command line to launch the simulation:\n\n%s", bLaunch ? "Using" : "Please use", command);
765 /* Now the real thing! */
768 fprintf(stdout, "\nLaunching simulation with best parameters now.\nExecuting '%s'", command);
771 gmx_system_call(command);
776 static void modify_PMEsettings(
777 gmx_int64_t simsteps, /* Set this value as number of time steps */
778 gmx_int64_t init_step, /* Set this value as init_step */
779 const char *fn_best_tpr, /* tpr file with the best performance */
780 const char *fn_sim_tpr) /* name of tpr file to be launched */
788 read_tpx_state(fn_best_tpr, ir, &state, NULL, &mtop);
790 /* Reset nsteps and init_step to the value of the input .tpr file */
791 ir->nsteps = simsteps;
792 ir->init_step = init_step;
794 /* Write the tpr file which will be launched */
795 sprintf(buf, "Writing optimized simulation file %s with nsteps=%s.\n", fn_sim_tpr, "%"GMX_PRId64);
796 fprintf(stdout, buf, ir->nsteps);
798 write_tpx_state(fn_sim_tpr, ir, &state, &mtop);
804 #define EPME_SWITCHED(e) ((e) == eelPMESWITCH || (e) == eelPMEUSERSWITCH)
806 /* Make additional TPR files with more computational load for the
807 * direct space processors: */
808 static void make_benchmark_tprs(
809 const char *fn_sim_tpr, /* READ : User-provided tpr file */
810 char *fn_bench_tprs[], /* WRITE: Names of benchmark tpr files */
811 gmx_int64_t benchsteps, /* Number of time steps for benchmark runs */
812 gmx_int64_t statesteps, /* Step counter in checkpoint file */
813 real rmin, /* Minimal Coulomb radius */
814 real rmax, /* Maximal Coulomb radius */
815 real bScaleRvdw, /* Scale rvdw along with rcoulomb */
816 int *ntprs, /* No. of TPRs to write, each with a different
817 rcoulomb and fourierspacing */
818 t_inputinfo *info, /* Contains information about mdp file options */
819 FILE *fp) /* Write the output here */
825 real nlist_buffer; /* Thickness of the buffer regions for PME-switch potentials */
828 gmx_bool bNote = FALSE;
829 real add; /* Add this to rcoul for the next test */
830 real fac = 1.0; /* Scaling factor for Coulomb radius */
831 real fourierspacing; /* Basic fourierspacing from tpr */
834 sprintf(buf, "Making benchmark tpr file%s with %s time step%s",
835 *ntprs > 1 ? "s" : "", "%"GMX_PRId64, benchsteps > 1 ? "s" : "");
836 fprintf(stdout, buf, benchsteps);
839 sprintf(buf, " (adding %s steps from checkpoint file)", "%"GMX_PRId64);
840 fprintf(stdout, buf, statesteps);
841 benchsteps += statesteps;
843 fprintf(stdout, ".\n");
847 read_tpx_state(fn_sim_tpr, ir, &state, NULL, &mtop);
849 /* Check if some kind of PME was chosen */
850 if (EEL_PME(ir->coulombtype) == FALSE)
852 gmx_fatal(FARGS, "Can only do optimizations for simulations with %s electrostatics.",
856 /* Check if rcoulomb == rlist, which is necessary for plain PME. */
857 if ( (ir->cutoff_scheme != ecutsVERLET) &&
858 (eelPME == ir->coulombtype) && !(ir->rcoulomb == ir->rlist))
860 gmx_fatal(FARGS, "%s requires rcoulomb (%f) to be equal to rlist (%f).",
861 EELTYPE(eelPME), ir->rcoulomb, ir->rlist);
863 /* For other PME types, rcoulomb is allowed to be smaller than rlist */
864 else if (ir->rcoulomb > ir->rlist)
866 gmx_fatal(FARGS, "%s requires rcoulomb (%f) to be equal to or smaller than rlist (%f)",
867 EELTYPE(ir->coulombtype), ir->rcoulomb, ir->rlist);
870 if (bScaleRvdw && ir->rvdw != ir->rcoulomb)
872 fprintf(stdout, "NOTE: input rvdw != rcoulomb, will not scale rvdw\n");
876 /* Reduce the number of steps for the benchmarks */
877 info->orig_sim_steps = ir->nsteps;
878 ir->nsteps = benchsteps;
879 /* We must not use init_step from the input tpr file for the benchmarks */
880 info->orig_init_step = ir->init_step;
883 /* For PME-switch potentials, keep the radial distance of the buffer region */
884 nlist_buffer = ir->rlist - ir->rcoulomb;
886 /* Determine length of triclinic box vectors */
887 for (d = 0; d < DIM; d++)
890 for (i = 0; i < DIM; i++)
892 box_size[d] += state.box[d][i]*state.box[d][i];
894 box_size[d] = sqrt(box_size[d]);
897 if (ir->fourier_spacing > 0)
899 info->fsx[0] = ir->fourier_spacing;
900 info->fsy[0] = ir->fourier_spacing;
901 info->fsz[0] = ir->fourier_spacing;
905 /* Reconstruct fourierspacing per dimension from the number of grid points and box size */
906 info->fsx[0] = box_size[XX]/ir->nkx;
907 info->fsy[0] = box_size[YY]/ir->nky;
908 info->fsz[0] = box_size[ZZ]/ir->nkz;
911 /* If no value for the fourierspacing was provided on the command line, we
912 * use the reconstruction from the tpr file */
913 if (ir->fourier_spacing > 0)
915 /* Use the spacing from the tpr */
916 fourierspacing = ir->fourier_spacing;
920 /* Use the maximum observed spacing */
921 fourierspacing = max(max(info->fsx[0], info->fsy[0]), info->fsz[0]);
924 fprintf(stdout, "Calculating PME grid points on the basis of a fourierspacing of %f nm\n", fourierspacing);
926 /* For performance comparisons the number of particles is useful to have */
927 fprintf(fp, " Number of particles : %d\n", mtop.natoms);
929 /* Print information about settings of which some are potentially modified: */
930 fprintf(fp, " Coulomb type : %s\n", EELTYPE(ir->coulombtype));
931 fprintf(fp, " Grid spacing x y z : %f %f %f\n",
932 box_size[XX]/ir->nkx, box_size[YY]/ir->nky, box_size[ZZ]/ir->nkz);
933 fprintf(fp, " Van der Waals type : %s\n", EVDWTYPE(ir->vdwtype));
934 if (ir_vdw_switched(ir))
936 fprintf(fp, " rvdw_switch : %f nm\n", ir->rvdw_switch);
938 if (EPME_SWITCHED(ir->coulombtype))
940 fprintf(fp, " rlist : %f nm\n", ir->rlist);
942 if (ir->rlistlong != max_cutoff(ir->rvdw, ir->rcoulomb))
944 fprintf(fp, " rlistlong : %f nm\n", ir->rlistlong);
947 /* Print a descriptive line about the tpr settings tested */
948 fprintf(fp, "\nWill try these real/reciprocal workload settings:\n");
949 fprintf(fp, " No. scaling rcoulomb");
950 fprintf(fp, " nkx nky nkz");
951 fprintf(fp, " spacing");
952 if (evdwCUT == ir->vdwtype)
954 fprintf(fp, " rvdw");
956 if (EPME_SWITCHED(ir->coulombtype))
958 fprintf(fp, " rlist");
960 if (ir->rlistlong != max_cutoff(ir->rlist, max_cutoff(ir->rvdw, ir->rcoulomb)) )
962 fprintf(fp, " rlistlong");
964 fprintf(fp, " tpr file\n");
966 /* Loop to create the requested number of tpr input files */
967 for (j = 0; j < *ntprs; j++)
969 /* The first .tpr is the provided one, just need to modify nsteps,
970 * so skip the following block */
973 /* Determine which Coulomb radii rc to use in the benchmarks */
974 add = (rmax-rmin)/(*ntprs-1);
975 if (is_equal(rmin, info->rcoulomb[0]))
977 ir->rcoulomb = rmin + j*add;
979 else if (is_equal(rmax, info->rcoulomb[0]))
981 ir->rcoulomb = rmin + (j-1)*add;
985 /* rmin != rcoul != rmax, ergo test between rmin and rmax */
986 add = (rmax-rmin)/(*ntprs-2);
987 ir->rcoulomb = rmin + (j-1)*add;
990 /* Determine the scaling factor fac */
991 fac = ir->rcoulomb/info->rcoulomb[0];
993 /* Scale the Fourier grid spacing */
994 ir->nkx = ir->nky = ir->nkz = 0;
995 calc_grid(NULL, state.box, fourierspacing*fac, &ir->nkx, &ir->nky, &ir->nkz);
997 /* Adjust other radii since various conditions neet to be fulfilled */
998 if (eelPME == ir->coulombtype)
1000 /* plain PME, rcoulomb must be equal to rlist */
1001 ir->rlist = ir->rcoulomb;
1005 /* rlist must be >= rcoulomb, we keep the size of the buffer region */
1006 ir->rlist = ir->rcoulomb + nlist_buffer;
1009 if (bScaleRvdw && evdwCUT == ir->vdwtype)
1011 /* For vdw cutoff, rvdw >= rlist */
1012 ir->rvdw = max(info->rvdw[0], ir->rlist);
1015 ir->rlistlong = max_cutoff(ir->rlist, max_cutoff(ir->rvdw, ir->rcoulomb));
1017 } /* end of "if (j != 0)" */
1019 /* for j==0: Save the original settings
1020 * for j >0: Save modified radii and Fourier grids */
1021 info->rcoulomb[j] = ir->rcoulomb;
1022 info->rvdw[j] = ir->rvdw;
1023 info->nkx[j] = ir->nkx;
1024 info->nky[j] = ir->nky;
1025 info->nkz[j] = ir->nkz;
1026 info->rlist[j] = ir->rlist;
1027 info->rlistlong[j] = ir->rlistlong;
1028 info->fsx[j] = fac*fourierspacing;
1029 info->fsy[j] = fac*fourierspacing;
1030 info->fsz[j] = fac*fourierspacing;
1032 /* Write the benchmark tpr file */
1033 strncpy(fn_bench_tprs[j], fn_sim_tpr, strlen(fn_sim_tpr)-strlen(".tpr"));
1034 sprintf(buf, "_bench%.2d.tpr", j);
1035 strcat(fn_bench_tprs[j], buf);
1036 fprintf(stdout, "Writing benchmark tpr %s with nsteps=", fn_bench_tprs[j]);
1037 fprintf(stdout, "%"GMX_PRId64, ir->nsteps);
1040 fprintf(stdout, ", scaling factor %f\n", fac);
1044 fprintf(stdout, ", unmodified settings\n");
1047 write_tpx_state(fn_bench_tprs[j], ir, &state, &mtop);
1049 /* Write information about modified tpr settings to log file */
1050 fprintf(fp, "%4d%10f%10f", j, fac, ir->rcoulomb);
1051 fprintf(fp, "%5d%5d%5d", ir->nkx, ir->nky, ir->nkz);
1052 fprintf(fp, " %9f ", info->fsx[j]);
1053 if (evdwCUT == ir->vdwtype)
1055 fprintf(fp, "%10f", ir->rvdw);
1057 if (EPME_SWITCHED(ir->coulombtype))
1059 fprintf(fp, "%10f", ir->rlist);
1061 if (info->rlistlong[0] != max_cutoff(info->rlist[0], max_cutoff(info->rvdw[0], info->rcoulomb[0])) )
1063 fprintf(fp, "%10f", ir->rlistlong);
1065 fprintf(fp, " %-14s\n", fn_bench_tprs[j]);
1067 /* Make it clear to the user that some additional settings were modified */
1068 if (!is_equal(ir->rvdw, info->rvdw[0])
1069 || !is_equal(ir->rlistlong, info->rlistlong[0]) )
1076 fprintf(fp, "\nNote that in addition to the Coulomb radius and the Fourier grid\n"
1077 "other input settings were also changed (see table above).\n"
1078 "Please check if the modified settings are appropriate.\n");
1086 /* Rename the files we want to keep to some meaningful filename and
1087 * delete the rest */
1088 static void cleanup(const t_filenm *fnm, int nfile, int k, int nnodes,
1089 int nPMEnodes, int nr, gmx_bool bKeepStderr)
1091 char numstring[STRLEN];
1092 char newfilename[STRLEN];
1093 const char *fn = NULL;
1098 fprintf(stdout, "Cleaning up, deleting benchmark temp files ...\n");
1100 for (i = 0; i < nfile; i++)
1102 opt = (char *)fnm[i].opt;
1103 if (strcmp(opt, "-p") == 0)
1105 /* do nothing; keep this file */
1108 else if (strcmp(opt, "-bg") == 0)
1110 /* Give the log file a nice name so one can later see which parameters were used */
1111 numstring[0] = '\0';
1114 sprintf(numstring, "_%d", nr);
1116 sprintf(newfilename, "%s_no%d_np%d_npme%d%s", opt2fn("-bg", nfile, fnm), k, nnodes, nPMEnodes, numstring);
1117 if (gmx_fexist(opt2fn("-bg", nfile, fnm)))
1119 fprintf(stdout, "renaming log file to %s\n", newfilename);
1120 make_backup(newfilename);
1121 rename(opt2fn("-bg", nfile, fnm), newfilename);
1124 else if (strcmp(opt, "-err") == 0)
1126 /* This file contains the output of stderr. We want to keep it in
1127 * cases where there have been problems. */
1128 fn = opt2fn(opt, nfile, fnm);
1129 numstring[0] = '\0';
1132 sprintf(numstring, "_%d", nr);
1134 sprintf(newfilename, "%s_no%d_np%d_npme%d%s", fn, k, nnodes, nPMEnodes, numstring);
1139 fprintf(stdout, "Saving stderr output in %s\n", newfilename);
1140 make_backup(newfilename);
1141 rename(fn, newfilename);
1145 fprintf(stdout, "Deleting %s\n", fn);
1150 /* Delete the files which are created for each benchmark run: (options -b*) */
1151 else if ( (0 == strncmp(opt, "-b", 2)) && (opt2bSet(opt, nfile, fnm) || !is_optional(&fnm[i])) )
1153 fn = opt2fn(opt, nfile, fnm);
1156 fprintf(stdout, "Deleting %s\n", fn);
1164 /* Returns the largest common factor of n1 and n2 */
1165 static int largest_common_factor(int n1, int n2)
1170 for (factor = nmax; factor > 0; factor--)
1172 if (0 == (n1 % factor) && 0 == (n2 % factor) )
1177 return 0; /* one for the compiler */
1181 eNpmeAuto, eNpmeAll, eNpmeReduced, eNpmeSubset, eNpmeNr
1184 /* Create a list of numbers of PME nodes to test */
1185 static void make_npme_list(
1186 const char *npmevalues_opt, /* Make a complete list with all
1187 * possibilities or a short list that keeps only
1188 * reasonable numbers of PME nodes */
1189 int *nentries, /* Number of entries we put in the nPMEnodes list */
1190 int *nPMEnodes[], /* Each entry contains the value for -npme */
1191 int nnodes, /* Total number of nodes to do the tests on */
1192 int minPMEnodes, /* Minimum number of PME nodes */
1193 int maxPMEnodes) /* Maximum number of PME nodes */
1196 int min_factor = 1; /* We request that npp and npme have this minimal
1197 * largest common factor (depends on npp) */
1198 int nlistmax; /* Max. list size */
1199 int nlist; /* Actual number of entries in list */
1203 /* Do we need to check all possible values for -npme or is a reduced list enough? */
1204 if (0 == strcmp(npmevalues_opt, "all") )
1208 else if (0 == strcmp(npmevalues_opt, "subset") )
1210 eNPME = eNpmeSubset;
1212 else /* "auto" or "range" */
1218 else if (nnodes < 128)
1220 eNPME = eNpmeReduced;
1224 eNPME = eNpmeSubset;
1228 /* Calculate how many entries we could possibly have (in case of -npme all) */
1231 nlistmax = maxPMEnodes - minPMEnodes + 3;
1232 if (0 == minPMEnodes)
1242 /* Now make the actual list which is at most of size nlist */
1243 snew(*nPMEnodes, nlistmax);
1244 nlist = 0; /* start counting again, now the real entries in the list */
1245 for (i = 0; i < nlistmax - 2; i++)
1247 npme = maxPMEnodes - i;
1258 /* For 2d PME we want a common largest factor of at least the cube
1259 * root of the number of PP nodes */
1260 min_factor = (int) pow(npp, 1.0/3.0);
1263 gmx_fatal(FARGS, "Unknown option for eNPME in make_npme_list");
1266 if (largest_common_factor(npp, npme) >= min_factor)
1268 (*nPMEnodes)[nlist] = npme;
1272 /* We always test 0 PME nodes and the automatic number */
1273 *nentries = nlist + 2;
1274 (*nPMEnodes)[nlist ] = 0;
1275 (*nPMEnodes)[nlist+1] = -1;
1277 fprintf(stderr, "Will try the following %d different values for -npme:\n", *nentries);
1278 for (i = 0; i < *nentries-1; i++)
1280 fprintf(stderr, "%d, ", (*nPMEnodes)[i]);
1282 fprintf(stderr, "and %d (auto).\n", (*nPMEnodes)[*nentries-1]);
1286 /* Allocate memory to store the performance data */
1287 static void init_perfdata(t_perf *perfdata[], int ntprs, int datasets, int repeats)
1292 for (k = 0; k < ntprs; k++)
1294 snew(perfdata[k], datasets);
1295 for (i = 0; i < datasets; i++)
1297 for (j = 0; j < repeats; j++)
1299 snew(perfdata[k][i].Gcycles, repeats);
1300 snew(perfdata[k][i].ns_per_day, repeats);
1301 snew(perfdata[k][i].PME_f_load, repeats);
1308 /* Check for errors on mdrun -h */
1309 static void make_sure_it_runs(char *mdrun_cmd_line, int length, FILE *fp)
1311 char *command, *msg;
1315 snew(command, length + 15);
1316 snew(msg, length + 500);
1318 fprintf(stdout, "Making sure the benchmarks can be executed ...\n");
1319 /* FIXME: mdrun -h no longer actually does anything useful.
1320 * It unconditionally prints the help, ignoring all other options. */
1321 sprintf(command, "%s-h -quiet", mdrun_cmd_line);
1322 ret = gmx_system_call(command);
1326 /* To prevent confusion, do not again issue a gmx_fatal here since we already
1327 * get the error message from mdrun itself */
1328 sprintf(msg, "Cannot run the benchmark simulations! Please check the error message of\n"
1329 "mdrun for the source of the problem. Did you provide a command line\n"
1330 "argument that neither g_tune_pme nor mdrun understands? Offending command:\n"
1331 "\n%s\n\n", command);
1333 fprintf(stderr, "%s", msg);
1335 fprintf(fp, "%s", msg);
1345 static void do_the_tests(
1346 FILE *fp, /* General g_tune_pme output file */
1347 char **tpr_names, /* Filenames of the input files to test */
1348 int maxPMEnodes, /* Max fraction of nodes to use for PME */
1349 int minPMEnodes, /* Min fraction of nodes to use for PME */
1350 int npme_fixed, /* If >= -1, test fixed number of PME
1352 const char *npmevalues_opt, /* Which -npme values should be tested */
1353 t_perf **perfdata, /* Here the performace data is stored */
1354 int *pmeentries, /* Entries in the nPMEnodes list */
1355 int repeats, /* Repeat each test this often */
1356 int nnodes, /* Total number of nodes = nPP + nPME */
1357 int nr_tprs, /* Total number of tpr files to test */
1358 gmx_bool bThreads, /* Threads or MPI? */
1359 char *cmd_mpirun, /* mpirun command string */
1360 char *cmd_np, /* "-np", "-n", whatever mpirun needs */
1361 char *cmd_mdrun, /* mdrun command string */
1362 char *cmd_args_bench, /* arguments for mdrun in a string */
1363 const t_filenm *fnm, /* List of filenames from command line */
1364 int nfile, /* Number of files specified on the cmdl. */
1365 int presteps, /* DLB equilibration steps, is checked */
1366 gmx_int64_t cpt_steps) /* Time step counter in the checkpoint */
1368 int i, nr, k, ret, count = 0, totaltests;
1369 int *nPMEnodes = NULL;
1372 char *command, *cmd_stub;
1374 gmx_bool bResetProblem = FALSE;
1375 gmx_bool bFirst = TRUE;
1378 /* This string array corresponds to the eParselog enum type at the start
1380 const char* ParseLog[] = {
1382 "Logfile not found!",
1383 "No timings, logfile truncated?",
1384 "Run was terminated.",
1385 "Counters were not reset properly.",
1386 "No DD grid found for these settings.",
1387 "TPX version conflict!",
1388 "mdrun was not started in parallel!",
1389 "Number of PP nodes has a prime factor that is too large.",
1392 char str_PME_f_load[13];
1395 /* Allocate space for the mdrun command line. 100 extra characters should
1396 be more than enough for the -npme etcetera arguments */
1397 cmdline_length = strlen(cmd_mpirun)
1400 + strlen(cmd_args_bench)
1401 + strlen(tpr_names[0]) + 100;
1402 snew(command, cmdline_length);
1403 snew(cmd_stub, cmdline_length);
1405 /* Construct the part of the command line that stays the same for all tests: */
1408 sprintf(cmd_stub, "%s%s", cmd_mdrun, cmd_np);
1412 sprintf(cmd_stub, "%s%s%s ", cmd_mpirun, cmd_np, cmd_mdrun);
1415 /* Create a list of numbers of PME nodes to test */
1416 if (npme_fixed < -1)
1418 make_npme_list(npmevalues_opt, pmeentries, &nPMEnodes,
1419 nnodes, minPMEnodes, maxPMEnodes);
1425 nPMEnodes[0] = npme_fixed;
1426 fprintf(stderr, "Will use a fixed number of %d PME-only nodes.\n", nPMEnodes[0]);
1431 fprintf(fp, "\nNo benchmarks done since number of repeats (-r) is 0.\n");
1433 finalize(opt2fn("-p", nfile, fnm));
1437 /* Allocate one dataset for each tpr input file: */
1438 init_perfdata(perfdata, nr_tprs, *pmeentries, repeats);
1440 /*****************************************/
1441 /* Main loop over all tpr files to test: */
1442 /*****************************************/
1443 totaltests = nr_tprs*(*pmeentries)*repeats;
1444 for (k = 0; k < nr_tprs; k++)
1446 fprintf(fp, "\nIndividual timings for input file %d (%s):\n", k, tpr_names[k]);
1447 fprintf(fp, "PME nodes Gcycles ns/day PME/f Remark\n");
1448 /* Loop over various numbers of PME nodes: */
1449 for (i = 0; i < *pmeentries; i++)
1451 pd = &perfdata[k][i];
1453 /* Loop over the repeats for each scenario: */
1454 for (nr = 0; nr < repeats; nr++)
1456 pd->nPMEnodes = nPMEnodes[i];
1458 /* Add -npme and -s to the command line and save it. Note that
1459 * the -passall (if set) options requires cmd_args_bench to be
1460 * at the end of the command line string */
1461 snew(pd->mdrun_cmd_line, cmdline_length);
1462 sprintf(pd->mdrun_cmd_line, "%s-npme %d -s %s %s",
1463 cmd_stub, pd->nPMEnodes, tpr_names[k], cmd_args_bench);
1465 /* To prevent that all benchmarks fail due to a show-stopper argument
1466 * on the mdrun command line, we make a quick check with mdrun -h first */
1469 make_sure_it_runs(pd->mdrun_cmd_line, cmdline_length, fp);
1473 /* Do a benchmark simulation: */
1476 sprintf(buf, ", pass %d/%d", nr+1, repeats);
1482 fprintf(stdout, "\n=== Progress %2.0f%%, tpr %d/%d, run %d/%d%s:\n",
1483 (100.0*count)/totaltests,
1484 k+1, nr_tprs, i+1, *pmeentries, buf);
1485 make_backup(opt2fn("-err", nfile, fnm));
1486 sprintf(command, "%s 1> /dev/null 2>%s", pd->mdrun_cmd_line, opt2fn("-err", nfile, fnm));
1487 fprintf(stdout, "%s\n", pd->mdrun_cmd_line);
1488 gmx_system_call(command);
1490 /* Collect the performance data from the log file; also check stderr
1491 * for fatal errors */
1492 ret = parse_logfile(opt2fn("-bg", nfile, fnm), opt2fn("-err", nfile, fnm),
1493 pd, nr, presteps, cpt_steps, nnodes);
1494 if ((presteps > 0) && (ret == eParselogResetProblem))
1496 bResetProblem = TRUE;
1499 if (-1 == pd->nPMEnodes)
1501 sprintf(buf, "(%3d)", pd->guessPME);
1509 if (pd->PME_f_load[nr] > 0.0)
1511 sprintf(str_PME_f_load, "%12.3f", pd->PME_f_load[nr]);
1515 sprintf(str_PME_f_load, "%s", " - ");
1518 /* Write the data we got to disk */
1519 fprintf(fp, "%4d%s %12.3f %12.3f %s %s", pd->nPMEnodes,
1520 buf, pd->Gcycles[nr], pd->ns_per_day[nr], str_PME_f_load, ParseLog[ret]);
1521 if (!(ret == eParselogOK || ret == eParselogNoDDGrid || ret == eParselogNotFound) )
1523 fprintf(fp, " Check %s file for problems.", ret == eParselogFatal ? "err" : "log");
1529 /* Do some cleaning up and delete the files we do not need any more */
1530 cleanup(fnm, nfile, k, nnodes, pd->nPMEnodes, nr, ret == eParselogFatal);
1532 /* If the first run with this number of processors already failed, do not try again: */
1533 if (pd->Gcycles[0] <= 0.0 && repeats > 1)
1535 fprintf(stdout, "Skipping remaining passes of unsuccessful setting, see log file for details.\n");
1536 count += repeats-(nr+1);
1539 } /* end of repeats loop */
1540 } /* end of -npme loop */
1541 } /* end of tpr file loop */
1546 fprintf(fp, "WARNING: The cycle and time step counters could not be reset properly. ");
1554 static void check_input(
1561 real maxPMEfraction,
1562 real minPMEfraction,
1564 gmx_int64_t bench_nsteps,
1565 const t_filenm *fnm,
1575 /* Make sure the input file exists */
1576 if (!gmx_fexist(opt2fn("-s", nfile, fnm)))
1578 gmx_fatal(FARGS, "File %s not found.", opt2fn("-s", nfile, fnm));
1581 /* Make sure that the checkpoint file is not overwritten during benchmarking */
1582 if ( (0 == strcmp(opt2fn("-cpi", nfile, fnm), opt2fn("-bcpo", nfile, fnm)) ) && (sim_part > 1) )
1584 gmx_fatal(FARGS, "Checkpoint input (-cpi) and benchmark checkpoint output (-bcpo) files must not be identical.\n"
1585 "The checkpoint input file must not be overwritten during the benchmarks.\n");
1588 /* Make sure that repeats is >= 0 (if == 0, only write tpr files) */
1591 gmx_fatal(FARGS, "Number of repeats < 0!");
1594 /* Check number of nodes */
1597 gmx_fatal(FARGS, "Number of nodes/threads must be a positive integer.");
1600 /* Automatically choose -ntpr if not set */
1610 /* Set a reasonable scaling factor for rcoulomb */
1613 *rmax = rcoulomb * 1.2;
1616 fprintf(stderr, "Will test %d tpr file%s.\n", *ntprs, *ntprs == 1 ? "" : "s");
1622 fprintf(stderr, "Note: Choose ntpr>1 to shift PME load between real and reciprocal space.\n");
1626 /* Make shure that rmin <= rcoulomb <= rmax */
1635 if (!(*rmin <= *rmax) )
1637 gmx_fatal(FARGS, "Please choose the Coulomb radii such that rmin <= rmax.\n"
1638 "rmin = %g, rmax = %g, actual rcoul from .tpr file = %g\n", *rmin, *rmax, rcoulomb);
1640 /* Add test scenarios if rmin or rmax were set */
1643 if (!is_equal(*rmin, rcoulomb) && (*ntprs == 1) )
1646 fprintf(stderr, "NOTE: Setting -rmin to %g changed -ntpr to %d\n",
1649 if (!is_equal(*rmax, rcoulomb) && (*ntprs == 1) )
1652 fprintf(stderr, "NOTE: Setting -rmax to %g changed -ntpr to %d\n",
1657 /* If one of rmin, rmax is set, we need 2 tpr files at minimum */
1658 if (!is_equal(*rmax, rcoulomb) || !is_equal(*rmin, rcoulomb) )
1660 *ntprs = max(*ntprs, 2);
1663 /* If both rmin, rmax are set, we need 3 tpr files at minimum */
1664 if (!is_equal(*rmax, rcoulomb) && !is_equal(*rmin, rcoulomb) )
1666 *ntprs = max(*ntprs, 3);
1671 fprintf(stderr, "NOTE: Your rmin, rmax setting changed -ntpr to %d\n", *ntprs);
1676 if (is_equal(*rmin, rcoulomb) && is_equal(rcoulomb, *rmax)) /* We have just a single rc */
1678 fprintf(stderr, "WARNING: Resetting -ntpr to 1 since no Coulomb radius scaling is requested.\n"
1679 "Please set rmin < rmax to test Coulomb radii in the [rmin, rmax] interval\n"
1680 "with correspondingly adjusted PME grid settings\n");
1685 /* Check whether max and min fraction are within required values */
1686 if (maxPMEfraction > 0.5 || maxPMEfraction < 0)
1688 gmx_fatal(FARGS, "-max must be between 0 and 0.5");
1690 if (minPMEfraction > 0.5 || minPMEfraction < 0)
1692 gmx_fatal(FARGS, "-min must be between 0 and 0.5");
1694 if (maxPMEfraction < minPMEfraction)
1696 gmx_fatal(FARGS, "-max must be larger or equal to -min");
1699 /* Check whether the number of steps - if it was set - has a reasonable value */
1700 if (bench_nsteps < 0)
1702 gmx_fatal(FARGS, "Number of steps must be positive.");
1705 if (bench_nsteps > 10000 || bench_nsteps < 100)
1707 fprintf(stderr, "WARNING: steps=");
1708 fprintf(stderr, "%"GMX_PRId64, bench_nsteps);
1709 fprintf(stderr, ". Are you sure you want to perform so %s steps for each benchmark?\n", (bench_nsteps < 100) ? "few" : "many");
1714 gmx_fatal(FARGS, "Cannot have a negative number of presteps.\n");
1717 /* Check for rcoulomb scaling if more than one .tpr file is tested */
1720 if (*rmin/rcoulomb < 0.75 || *rmax/rcoulomb > 1.25)
1722 fprintf(stderr, "WARNING: Applying extreme scaling factor. I hope you know what you are doing.\n");
1726 /* If a fixed number of PME nodes is set we do rcoulomb and PME gird tuning
1727 * only. We need to check whether the requested number of PME-only nodes
1729 if (npme_fixed > -1)
1731 /* No more than 50% of all nodes can be assigned as PME-only nodes. */
1732 if (2*npme_fixed > nnodes)
1734 gmx_fatal(FARGS, "Cannot have more than %d PME-only nodes for a total of %d nodes (you chose %d).\n",
1735 nnodes/2, nnodes, npme_fixed);
1737 if ((npme_fixed > 0) && (5*npme_fixed < nnodes))
1739 fprintf(stderr, "WARNING: Only %g percent of the nodes are assigned as PME-only nodes.\n",
1740 100.0*((real)npme_fixed / (real)nnodes));
1742 if (opt2parg_bSet("-min", npargs, pa) || opt2parg_bSet("-max", npargs, pa))
1744 fprintf(stderr, "NOTE: The -min, -max, and -npme options have no effect when a\n"
1745 " fixed number of PME-only nodes is requested with -fix.\n");
1751 /* Returns TRUE when "opt" is needed at launch time */
1752 static gmx_bool is_launch_file(char *opt, gmx_bool bSet)
1754 if (0 == strncmp(opt, "-swap", 5))
1759 /* Apart from the input .tpr and the output log files we need all options that
1760 * were set on the command line and that do not start with -b */
1761 if (0 == strncmp(opt, "-b", 2) || 0 == strncmp(opt, "-s", 2)
1762 || 0 == strncmp(opt, "-err", 4) || 0 == strncmp(opt, "-p", 2) )
1771 /* Returns TRUE when "opt" defines a file which is needed for the benchmarks runs */
1772 static gmx_bool is_bench_file(char *opt, gmx_bool bSet, gmx_bool bOptional, gmx_bool bIsOutput)
1774 /* Apart from the input .tpr, all files starting with "-b" are for
1775 * _b_enchmark files exclusively */
1776 if (0 == strncmp(opt, "-s", 2))
1781 if (0 == strncmp(opt, "-b", 2) || 0 == strncmp(opt, "-s", 2))
1783 if (!bOptional || bSet)
1800 if (bSet) /* These are additional input files like -cpi -ei */
1813 /* Adds 'buf' to 'str' */
1814 static void add_to_string(char **str, char *buf)
1819 len = strlen(*str) + strlen(buf) + 1;
1825 /* Create the command line for the benchmark as well as for the real run */
1826 static void create_command_line_snippets(
1827 gmx_bool bAppendFiles,
1828 gmx_bool bKeepAndNumCPT,
1829 gmx_bool bResetHWay,
1833 char *cmd_args_bench[], /* command line arguments for benchmark runs */
1834 char *cmd_args_launch[], /* command line arguments for simulation run */
1835 char extra_args[]) /* Add this to the end of the command line */
1840 char strbuf[STRLEN];
1843 /* strlen needs at least '\0' as a string: */
1844 snew(*cmd_args_bench, 1);
1845 snew(*cmd_args_launch, 1);
1846 *cmd_args_launch[0] = '\0';
1847 *cmd_args_bench[0] = '\0';
1850 /*******************************************/
1851 /* 1. Process other command line arguments */
1852 /*******************************************/
1855 /* Add equilibration steps to benchmark options */
1856 sprintf(strbuf, "-resetstep %d ", presteps);
1857 add_to_string(cmd_args_bench, strbuf);
1859 /* These switches take effect only at launch time */
1860 if (FALSE == bAppendFiles)
1862 add_to_string(cmd_args_launch, "-noappend ");
1866 add_to_string(cmd_args_launch, "-cpnum ");
1870 add_to_string(cmd_args_launch, "-resethway ");
1873 /********************/
1874 /* 2. Process files */
1875 /********************/
1876 for (i = 0; i < nfile; i++)
1878 opt = (char *)fnm[i].opt;
1879 name = opt2fn(opt, nfile, fnm);
1881 /* Strbuf contains the options, now let's sort out where we need that */
1882 sprintf(strbuf, "%s %s ", opt, name);
1884 if (is_bench_file(opt, opt2bSet(opt, nfile, fnm), is_optional(&fnm[i]), is_output(&fnm[i])) )
1886 /* All options starting with -b* need the 'b' removed,
1887 * therefore overwrite strbuf */
1888 if (0 == strncmp(opt, "-b", 2))
1890 sprintf(strbuf, "-%s %s ", &opt[2], name);
1893 add_to_string(cmd_args_bench, strbuf);
1896 if (is_launch_file(opt, opt2bSet(opt, nfile, fnm)) )
1898 add_to_string(cmd_args_launch, strbuf);
1902 add_to_string(cmd_args_bench, extra_args);
1903 add_to_string(cmd_args_launch, extra_args);
1907 /* Set option opt */
1908 static void setopt(const char *opt, int nfile, t_filenm fnm[])
1912 for (i = 0; (i < nfile); i++)
1914 if (strcmp(opt, fnm[i].opt) == 0)
1916 fnm[i].flag |= ffSET;
1922 /* This routine inspects the tpr file and ...
1923 * 1. checks for output files that get triggered by a tpr option. These output
1924 * files are marked as 'set' to allow for a proper cleanup after each
1926 * 2. returns the PME:PP load ratio
1927 * 3. returns rcoulomb from the tpr */
1928 static float inspect_tpr(int nfile, t_filenm fnm[], real *rcoulomb)
1930 gmx_bool bPull; /* Is pulling requested in .tpr file? */
1931 gmx_bool bTpi; /* Is test particle insertion requested? */
1932 gmx_bool bFree; /* Is a free energy simulation requested? */
1933 gmx_bool bNM; /* Is a normal mode analysis requested? */
1934 gmx_bool bSwap; /* Is water/ion position swapping requested? */
1940 /* Check tpr file for options that trigger extra output files */
1941 read_tpx_state(opt2fn("-s", nfile, fnm), &ir, &state, NULL, &mtop);
1942 bPull = (epullNO != ir.ePull);
1943 bFree = (efepNO != ir.efep );
1944 bNM = (eiNM == ir.eI );
1945 bSwap = (eswapNO != ir.eSwapCoords);
1946 bTpi = EI_TPI(ir.eI);
1948 /* Set these output files on the tuning command-line */
1951 setopt("-pf", nfile, fnm);
1952 setopt("-px", nfile, fnm);
1956 setopt("-dhdl", nfile, fnm);
1960 setopt("-tpi", nfile, fnm);
1961 setopt("-tpid", nfile, fnm);
1965 setopt("-mtx", nfile, fnm);
1969 setopt("-swap", nfile, fnm);
1972 *rcoulomb = ir.rcoulomb;
1974 /* Return the estimate for the number of PME nodes */
1975 return pme_load_estimate(&mtop, &ir, state.box);
1979 static void couple_files_options(int nfile, t_filenm fnm[])
1982 gmx_bool bSet, bBench;
1987 for (i = 0; i < nfile; i++)
1989 opt = (char *)fnm[i].opt;
1990 bSet = ((fnm[i].flag & ffSET) != 0);
1991 bBench = (0 == strncmp(opt, "-b", 2));
1993 /* Check optional files */
1994 /* If e.g. -eo is set, then -beo also needs to be set */
1995 if (is_optional(&fnm[i]) && bSet && !bBench)
1997 sprintf(buf, "-b%s", &opt[1]);
1998 setopt(buf, nfile, fnm);
2000 /* If -beo is set, then -eo also needs to be! */
2001 if (is_optional(&fnm[i]) && bSet && bBench)
2003 sprintf(buf, "-%s", &opt[2]);
2004 setopt(buf, nfile, fnm);
2010 #define BENCHSTEPS (1000)
2012 int gmx_tune_pme(int argc, char *argv[])
2014 const char *desc[] = {
2015 "For a given number [TT]-np[tt] or [TT]-ntmpi[tt] of processors/threads, [THISMODULE] systematically",
2016 "times [gmx-mdrun] with various numbers of PME-only nodes and determines",
2017 "which setting is fastest. It will also test whether performance can",
2018 "be enhanced by shifting load from the reciprocal to the real space",
2019 "part of the Ewald sum. ",
2020 "Simply pass your [TT].tpr[tt] file to [THISMODULE] together with other options",
2021 "for [gmx-mdrun] as needed.[PAR]",
2022 "Which executables are used can be set in the environment variables",
2023 "MPIRUN and MDRUN. If these are not present, 'mpirun' and 'mdrun'",
2024 "will be used as defaults. Note that for certain MPI frameworks you",
2025 "need to provide a machine- or hostfile. This can also be passed",
2026 "via the MPIRUN variable, e.g.[PAR]",
2027 "[TT]export MPIRUN=\"/usr/local/mpirun -machinefile hosts\"[tt][PAR]",
2028 "Please call [THISMODULE] with the normal options you would pass to",
2029 "[gmx-mdrun] and add [TT]-np[tt] for the number of processors to perform the",
2030 "tests on, or [TT]-ntmpi[tt] for the number of threads. You can also add [TT]-r[tt]",
2031 "to repeat each test several times to get better statistics. [PAR]",
2032 "[THISMODULE] can test various real space / reciprocal space workloads",
2033 "for you. With [TT]-ntpr[tt] you control how many extra [TT].tpr[tt] files will be",
2034 "written with enlarged cutoffs and smaller Fourier grids respectively.",
2035 "Typically, the first test (number 0) will be with the settings from the input",
2036 "[TT].tpr[tt] file; the last test (number [TT]ntpr[tt]) will have the Coulomb cutoff",
2037 "specified by [TT]-rmax[tt] with a somwhat smaller PME grid at the same time. ",
2038 "In this last test, the Fourier spacing is multiplied with [TT]rmax[tt]/rcoulomb. ",
2039 "The remaining [TT].tpr[tt] files will have equally-spaced Coulomb radii (and Fourier "
2040 "spacings) between these extremes. [BB]Note[bb] that you can set [TT]-ntpr[tt] to 1",
2041 "if you just seek the optimal number of PME-only nodes; in that case",
2042 "your input [TT].tpr[tt] file will remain unchanged.[PAR]",
2043 "For the benchmark runs, the default of 1000 time steps should suffice for most",
2044 "MD systems. The dynamic load balancing needs about 100 time steps",
2045 "to adapt to local load imbalances, therefore the time step counters",
2046 "are by default reset after 100 steps. For large systems (>1M atoms), as well as ",
2047 "for a higher accuarcy of the measurements, you should set [TT]-resetstep[tt] to a higher value.",
2048 "From the 'DD' load imbalance entries in the md.log output file you",
2049 "can tell after how many steps the load is sufficiently balanced. Example call:[PAR]"
2050 "[TT]gmx tune_pme -np 64 -s protein.tpr -launch[tt][PAR]",
2051 "After calling [gmx-mdrun] several times, detailed performance information",
2052 "is available in the output file [TT]perf.out[tt].",
2053 "[BB]Note[bb] that during the benchmarks, a couple of temporary files are written",
2054 "(options [TT]-b[tt]*), these will be automatically deleted after each test.[PAR]",
2055 "If you want the simulation to be started automatically with the",
2056 "optimized parameters, use the command line option [TT]-launch[tt].[PAR]",
2061 int pmeentries = 0; /* How many values for -npme do we actually test for each tpr file */
2062 real maxPMEfraction = 0.50;
2063 real minPMEfraction = 0.25;
2064 int maxPMEnodes, minPMEnodes;
2065 float guessPMEratio; /* guessed PME:PP ratio based on the tpr file */
2066 float guessPMEnodes;
2067 int npme_fixed = -2; /* If >= -1, use only this number
2068 * of PME-only nodes */
2070 real rmin = 0.0, rmax = 0.0; /* min and max value for rcoulomb if scaling is requested */
2071 real rcoulomb = -1.0; /* Coulomb radius as set in .tpr file */
2072 gmx_bool bScaleRvdw = TRUE;
2073 gmx_int64_t bench_nsteps = BENCHSTEPS;
2074 gmx_int64_t new_sim_nsteps = -1; /* -1 indicates: not set by the user */
2075 gmx_int64_t cpt_steps = 0; /* Step counter in .cpt input file */
2076 int presteps = 100; /* Do a full cycle reset after presteps steps */
2077 gmx_bool bOverwrite = FALSE, bKeepTPR;
2078 gmx_bool bLaunch = FALSE;
2079 char *ExtraArgs = NULL;
2080 char **tpr_names = NULL;
2081 const char *simulation_tpr = NULL;
2082 int best_npme, best_tpr;
2083 int sim_part = 1; /* For benchmarks with checkpoint files */
2086 /* Default program names if nothing else is found */
2087 char *cmd_mpirun = NULL, *cmd_mdrun = NULL;
2088 char *cmd_args_bench, *cmd_args_launch;
2089 char *cmd_np = NULL;
2091 t_perf **perfdata = NULL;
2097 /* Print out how long the tuning took */
2100 static t_filenm fnm[] = {
2102 { efOUT, "-p", "perf", ffWRITE },
2103 { efLOG, "-err", "bencherr", ffWRITE },
2104 { efTPX, "-so", "tuned", ffWRITE },
2106 { efTPX, NULL, NULL, ffREAD },
2107 { efTRN, "-o", NULL, ffWRITE },
2108 { efCOMPRESSED, "-x", NULL, ffOPTWR },
2109 { efCPT, "-cpi", NULL, ffOPTRD },
2110 { efCPT, "-cpo", NULL, ffOPTWR },
2111 { efSTO, "-c", "confout", ffWRITE },
2112 { efEDR, "-e", "ener", ffWRITE },
2113 { efLOG, "-g", "md", ffWRITE },
2114 { efXVG, "-dhdl", "dhdl", ffOPTWR },
2115 { efXVG, "-field", "field", ffOPTWR },
2116 { efXVG, "-table", "table", ffOPTRD },
2117 { efXVG, "-tabletf", "tabletf", ffOPTRD },
2118 { efXVG, "-tablep", "tablep", ffOPTRD },
2119 { efXVG, "-tableb", "table", ffOPTRD },
2120 { efTRX, "-rerun", "rerun", ffOPTRD },
2121 { efXVG, "-tpi", "tpi", ffOPTWR },
2122 { efXVG, "-tpid", "tpidist", ffOPTWR },
2123 { efEDI, "-ei", "sam", ffOPTRD },
2124 { efXVG, "-eo", "edsam", ffOPTWR },
2125 { efXVG, "-devout", "deviatie", ffOPTWR },
2126 { efXVG, "-runav", "runaver", ffOPTWR },
2127 { efXVG, "-px", "pullx", ffOPTWR },
2128 { efXVG, "-pf", "pullf", ffOPTWR },
2129 { efXVG, "-ro", "rotation", ffOPTWR },
2130 { efLOG, "-ra", "rotangles", ffOPTWR },
2131 { efLOG, "-rs", "rotslabs", ffOPTWR },
2132 { efLOG, "-rt", "rottorque", ffOPTWR },
2133 { efMTX, "-mtx", "nm", ffOPTWR },
2134 { efNDX, "-dn", "dipole", ffOPTWR },
2135 { efXVG, "-swap", "swapions", ffOPTWR },
2136 /* Output files that are deleted after each benchmark run */
2137 { efTRN, "-bo", "bench", ffWRITE },
2138 { efXTC, "-bx", "bench", ffWRITE },
2139 { efCPT, "-bcpo", "bench", ffWRITE },
2140 { efSTO, "-bc", "bench", ffWRITE },
2141 { efEDR, "-be", "bench", ffWRITE },
2142 { efLOG, "-bg", "bench", ffWRITE },
2143 { efXVG, "-beo", "benchedo", ffOPTWR },
2144 { efXVG, "-bdhdl", "benchdhdl", ffOPTWR },
2145 { efXVG, "-bfield", "benchfld", ffOPTWR },
2146 { efXVG, "-btpi", "benchtpi", ffOPTWR },
2147 { efXVG, "-btpid", "benchtpid", ffOPTWR },
2148 { efXVG, "-bdevout", "benchdev", ffOPTWR },
2149 { efXVG, "-brunav", "benchrnav", ffOPTWR },
2150 { efXVG, "-bpx", "benchpx", ffOPTWR },
2151 { efXVG, "-bpf", "benchpf", ffOPTWR },
2152 { efXVG, "-bro", "benchrot", ffOPTWR },
2153 { efLOG, "-bra", "benchrota", ffOPTWR },
2154 { efLOG, "-brs", "benchrots", ffOPTWR },
2155 { efLOG, "-brt", "benchrott", ffOPTWR },
2156 { efMTX, "-bmtx", "benchn", ffOPTWR },
2157 { efNDX, "-bdn", "bench", ffOPTWR },
2158 { efXVG, "-bswap", "benchswp", ffOPTWR }
2161 gmx_bool bThreads = FALSE;
2165 const char *procstring[] =
2166 { NULL, "-np", "-n", "none", NULL };
2167 const char *npmevalues_opt[] =
2168 { NULL, "auto", "all", "subset", NULL };
2170 gmx_bool bAppendFiles = TRUE;
2171 gmx_bool bKeepAndNumCPT = FALSE;
2172 gmx_bool bResetCountersHalfWay = FALSE;
2173 gmx_bool bBenchmark = TRUE;
2175 output_env_t oenv = NULL;
2178 /***********************/
2179 /* g_tune_pme options: */
2180 /***********************/
2181 { "-np", FALSE, etINT, {&nnodes},
2182 "Number of nodes to run the tests on (must be > 2 for separate PME nodes)" },
2183 { "-npstring", FALSE, etENUM, {procstring},
2184 "Specify the number of processors to [TT]$MPIRUN[tt] using this string"},
2185 { "-ntmpi", FALSE, etINT, {&nthreads},
2186 "Number of MPI-threads to run the tests on (turns MPI & mpirun off)"},
2187 { "-r", FALSE, etINT, {&repeats},
2188 "Repeat each test this often" },
2189 { "-max", FALSE, etREAL, {&maxPMEfraction},
2190 "Max fraction of PME nodes to test with" },
2191 { "-min", FALSE, etREAL, {&minPMEfraction},
2192 "Min fraction of PME nodes to test with" },
2193 { "-npme", FALSE, etENUM, {npmevalues_opt},
2194 "Within -min and -max, benchmark all possible values for [TT]-npme[tt], or just a reasonable subset. "
2195 "Auto neglects -min and -max and chooses reasonable values around a guess for npme derived from the .tpr"},
2196 { "-fix", FALSE, etINT, {&npme_fixed},
2197 "If >= -1, do not vary the number of PME-only nodes, instead use this fixed value and only vary rcoulomb and the PME grid spacing."},
2198 { "-rmax", FALSE, etREAL, {&rmax},
2199 "If >0, maximal rcoulomb for -ntpr>1 (rcoulomb upscaling results in fourier grid downscaling)" },
2200 { "-rmin", FALSE, etREAL, {&rmin},
2201 "If >0, minimal rcoulomb for -ntpr>1" },
2202 { "-scalevdw", FALSE, etBOOL, {&bScaleRvdw},
2203 "Scale rvdw along with rcoulomb"},
2204 { "-ntpr", FALSE, etINT, {&ntprs},
2205 "Number of [TT].tpr[tt] files to benchmark. Create this many files with different rcoulomb scaling factors depending on -rmin and -rmax. "
2206 "If < 1, automatically choose the number of [TT].tpr[tt] files to test" },
2207 { "-steps", FALSE, etINT64, {&bench_nsteps},
2208 "Take timings for this many steps in the benchmark runs" },
2209 { "-resetstep", FALSE, etINT, {&presteps},
2210 "Let dlb equilibrate this many steps before timings are taken (reset cycle counters after this many steps)" },
2211 { "-simsteps", FALSE, etINT64, {&new_sim_nsteps},
2212 "If non-negative, perform this many steps in the real run (overwrites nsteps from [TT].tpr[tt], add [TT].cpt[tt] steps)" },
2213 { "-launch", FALSE, etBOOL, {&bLaunch},
2214 "Launch the real simulation after optimization" },
2215 { "-bench", FALSE, etBOOL, {&bBenchmark},
2216 "Run the benchmarks or just create the input [TT].tpr[tt] files?" },
2217 /******************/
2218 /* mdrun options: */
2219 /******************/
2220 /* We let g_tune_pme parse and understand these options, because we need to
2221 * prevent that they appear on the mdrun command line for the benchmarks */
2222 { "-append", FALSE, etBOOL, {&bAppendFiles},
2223 "Append to previous output files when continuing from checkpoint instead of adding the simulation part number to all file names (for launch only)" },
2224 { "-cpnum", FALSE, etBOOL, {&bKeepAndNumCPT},
2225 "Keep and number checkpoint files (launch only)" },
2226 { "-resethway", FALSE, etBOOL, {&bResetCountersHalfWay},
2227 "HIDDENReset the cycle counters after half the number of steps or halfway [TT]-maxh[tt] (launch only)" }
2230 #define NFILE asize(fnm)
2232 seconds = gmx_gettime();
2234 if (!parse_common_args(&argc, argv, PCA_NOEXIT_ON_ARGS,
2235 NFILE, fnm, asize(pa), pa, asize(desc), desc,
2241 /* Store the remaining unparsed command line entries in a string which
2242 * is then attached to the mdrun command line */
2244 ExtraArgs[0] = '\0';
2245 for (i = 1; i < argc; i++) /* argc will now be 1 if everything was understood */
2247 add_to_string(&ExtraArgs, argv[i]);
2248 add_to_string(&ExtraArgs, " ");
2251 if (opt2parg_bSet("-ntmpi", asize(pa), pa))
2254 if (opt2parg_bSet("-npstring", asize(pa), pa))
2256 fprintf(stderr, "WARNING: -npstring has no effect when using threads.\n");
2261 gmx_fatal(FARGS, "Can't run multi-threaded MPI simulation yet!");
2263 /* and now we just set this; a bit of an ugly hack*/
2266 /* Check for PME:PP ratio and whether tpr triggers additional output files */
2267 guessPMEratio = inspect_tpr(NFILE, fnm, &rcoulomb);
2269 /* Automatically set -beo options if -eo is set etc. */
2270 couple_files_options(NFILE, fnm);
2272 /* Construct the command line arguments for benchmark runs
2273 * as well as for the simulation run */
2276 sprintf(bbuf, " -ntmpi %d ", nthreads);
2280 /* This string will be used for MPI runs and will appear after the
2281 * mpirun command. */
2282 if (strcmp(procstring[0], "none") != 0)
2284 sprintf(bbuf, " %s %d ", procstring[0], nnodes);
2294 create_command_line_snippets(bAppendFiles, bKeepAndNumCPT, bResetCountersHalfWay, presteps,
2295 NFILE, fnm, &cmd_args_bench, &cmd_args_launch, ExtraArgs);
2297 /* Read in checkpoint file if requested */
2299 if (opt2bSet("-cpi", NFILE, fnm))
2302 cr->duty = DUTY_PP; /* makes the following routine happy */
2303 read_checkpoint_simulation_part(opt2fn("-cpi", NFILE, fnm),
2304 &sim_part, &cpt_steps, cr,
2305 FALSE, NFILE, fnm, NULL, NULL);
2308 /* sim_part will now be 1 if no checkpoint file was found */
2311 gmx_fatal(FARGS, "Checkpoint file %s not found!", opt2fn("-cpi", NFILE, fnm));
2315 /* Open performance output file and write header info */
2316 fp = gmx_ffopen(opt2fn("-p", NFILE, fnm), "w");
2318 /* Make a quick consistency check of command line parameters */
2319 check_input(nnodes, repeats, &ntprs, &rmin, rcoulomb, &rmax,
2320 maxPMEfraction, minPMEfraction, npme_fixed,
2321 bench_nsteps, fnm, NFILE, sim_part, presteps,
2324 /* Determine the maximum and minimum number of PME nodes to test,
2325 * the actual list of settings is build in do_the_tests(). */
2326 if ((nnodes > 2) && (npme_fixed < -1))
2328 if (0 == strcmp(npmevalues_opt[0], "auto"))
2330 /* Determine the npme range automatically based on the PME:PP load guess */
2331 if (guessPMEratio > 1.0)
2333 /* More PME than PP work, probably we do not need separate PME nodes at all! */
2334 maxPMEnodes = nnodes/2;
2335 minPMEnodes = nnodes/2;
2339 /* PME : PP load is in the range 0..1, let's test around the guess */
2340 guessPMEnodes = nnodes/(1.0 + 1.0/guessPMEratio);
2341 minPMEnodes = floor(0.7*guessPMEnodes);
2342 maxPMEnodes = ceil(1.6*guessPMEnodes);
2343 maxPMEnodes = min(maxPMEnodes, nnodes/2);
2348 /* Determine the npme range based on user input */
2349 maxPMEnodes = floor(maxPMEfraction*nnodes);
2350 minPMEnodes = max(floor(minPMEfraction*nnodes), 0);
2351 fprintf(stdout, "Will try runs with %d ", minPMEnodes);
2352 if (maxPMEnodes != minPMEnodes)
2354 fprintf(stdout, "- %d ", maxPMEnodes);
2356 fprintf(stdout, "PME-only nodes.\n Note that the automatic number of PME-only nodes and no separate PME nodes are always tested.\n");
2365 /* Get the commands we need to set up the runs from environment variables */
2366 get_program_paths(bThreads, &cmd_mpirun, &cmd_mdrun);
2367 if (bBenchmark && repeats > 0)
2369 check_mdrun_works(bThreads, cmd_mpirun, cmd_np, cmd_mdrun);
2372 /* Print some header info to file */
2374 fprintf(fp, "\n P E R F O R M A N C E R E S U L T S\n");
2376 fprintf(fp, "%s for Gromacs %s\n", ShortProgram(), GromacsVersion());
2379 fprintf(fp, "Number of nodes : %d\n", nnodes);
2380 fprintf(fp, "The mpirun command is : %s\n", cmd_mpirun);
2381 if (strcmp(procstring[0], "none") != 0)
2383 fprintf(fp, "Passing # of nodes via : %s\n", procstring[0]);
2387 fprintf(fp, "Not setting number of nodes in system call\n");
2392 fprintf(fp, "Number of threads : %d\n", nnodes);
2395 fprintf(fp, "The mdrun command is : %s\n", cmd_mdrun);
2396 fprintf(fp, "mdrun args benchmarks : %s\n", cmd_args_bench);
2397 fprintf(fp, "Benchmark steps : ");
2398 fprintf(fp, "%"GMX_PRId64, bench_nsteps);
2400 fprintf(fp, "dlb equilibration steps : %d\n", presteps);
2403 fprintf(fp, "Checkpoint time step : ");
2404 fprintf(fp, "%"GMX_PRId64, cpt_steps);
2407 fprintf(fp, "mdrun args at launchtime: %s\n", cmd_args_launch);
2409 if (new_sim_nsteps >= 0)
2412 fprintf(stderr, "Note: Simulation input file %s will have ", opt2fn("-so", NFILE, fnm));
2413 fprintf(stderr, "%"GMX_PRId64, new_sim_nsteps+cpt_steps);
2414 fprintf(stderr, " steps.\n");
2415 fprintf(fp, "Simulation steps : ");
2416 fprintf(fp, "%"GMX_PRId64, new_sim_nsteps);
2421 fprintf(fp, "Repeats for each test : %d\n", repeats);
2424 if (npme_fixed >= -1)
2426 fprintf(fp, "Fixing -npme at : %d\n", npme_fixed);
2429 fprintf(fp, "Input file : %s\n", opt2fn("-s", NFILE, fnm));
2430 fprintf(fp, " PME/PP load estimate : %g\n", guessPMEratio);
2432 /* Allocate memory for the inputinfo struct: */
2434 info->nr_inputfiles = ntprs;
2435 for (i = 0; i < ntprs; i++)
2437 snew(info->rcoulomb, ntprs);
2438 snew(info->rvdw, ntprs);
2439 snew(info->rlist, ntprs);
2440 snew(info->rlistlong, ntprs);
2441 snew(info->nkx, ntprs);
2442 snew(info->nky, ntprs);
2443 snew(info->nkz, ntprs);
2444 snew(info->fsx, ntprs);
2445 snew(info->fsy, ntprs);
2446 snew(info->fsz, ntprs);
2448 /* Make alternative tpr files to test: */
2449 snew(tpr_names, ntprs);
2450 for (i = 0; i < ntprs; i++)
2452 snew(tpr_names[i], STRLEN);
2455 /* It can be that ntprs is reduced by make_benchmark_tprs if not enough
2456 * different grids could be found. */
2457 make_benchmark_tprs(opt2fn("-s", NFILE, fnm), tpr_names, bench_nsteps+presteps,
2458 cpt_steps, rmin, rmax, bScaleRvdw, &ntprs, info, fp);
2460 /********************************************************************************/
2461 /* Main loop over all scenarios we need to test: tpr files, PME nodes, repeats */
2462 /********************************************************************************/
2463 snew(perfdata, ntprs);
2466 do_the_tests(fp, tpr_names, maxPMEnodes, minPMEnodes, npme_fixed, npmevalues_opt[0], perfdata, &pmeentries,
2467 repeats, nnodes, ntprs, bThreads, cmd_mpirun, cmd_np, cmd_mdrun,
2468 cmd_args_bench, fnm, NFILE, presteps, cpt_steps);
2470 fprintf(fp, "\nTuning took%8.1f minutes.\n", (gmx_gettime()-seconds)/60.0);
2472 /* Analyse the results and give a suggestion for optimal settings: */
2473 bKeepTPR = analyze_data(fp, opt2fn("-p", NFILE, fnm), perfdata, nnodes, ntprs, pmeentries,
2474 repeats, info, &best_tpr, &best_npme);
2476 /* Take the best-performing tpr file and enlarge nsteps to original value */
2477 if (bKeepTPR && !bOverwrite)
2479 simulation_tpr = opt2fn("-s", NFILE, fnm);
2483 simulation_tpr = opt2fn("-so", NFILE, fnm);
2484 modify_PMEsettings(bOverwrite ? (new_sim_nsteps+cpt_steps) : info->orig_sim_steps,
2485 info->orig_init_step, tpr_names[best_tpr], simulation_tpr);
2488 /* Let's get rid of the temporary benchmark input files */
2489 for (i = 0; i < ntprs; i++)
2491 fprintf(stdout, "Deleting temporary benchmark input file %s\n", tpr_names[i]);
2492 remove(tpr_names[i]);
2495 /* Now start the real simulation if the user requested it ... */
2496 launch_simulation(bLaunch, fp, bThreads, cmd_mpirun, cmd_np, cmd_mdrun,
2497 cmd_args_launch, simulation_tpr, best_npme);
2501 /* ... or simply print the performance results to screen: */
2504 finalize(opt2fn("-p", NFILE, fnm));