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39 #include "basenetwork.h"
54 #include "gromacs/utility/cstringutil.h"
55 #include "gromacs/utility/fatalerror.h"
56 #include "gromacs/utility/gmxmpi.h"
57 #include "gromacs/utility/programcontext.h"
59 int gmx_gethostname(char *name, size_t len)
63 gmx_incons("gmx_gethostname called with len<8");
65 #if defined(HAVE_UNISTD_H) && !defined(__native_client__) && !defined(__MINGW32__)
66 if (gethostname(name, len-1) != 0)
68 std::strncpy(name, "unknown", 8);
73 std::strncpy(name, "unknown", 8);
78 gmx_bool gmx_mpi_initialized(void)
90 int gmx_node_num(void)
96 if (!gmx_mpi_initialized())
102 (void) MPI_Comm_size(MPI_COMM_WORLD, &i);
107 int gmx_node_rank(void)
112 #ifdef GMX_THREAD_MPI
113 if (!gmx_mpi_initialized())
119 (void) MPI_Comm_rank(MPI_COMM_WORLD, &i);
124 static int mpi_hostname_hash(void)
129 /* We have a single physical node */
133 char mpi_hostname[MPI_MAX_PROCESSOR_NAME];
135 /* This procedure can only differentiate nodes with different names.
136 * Architectures where different physical nodes have identical names,
137 * such as IBM Blue Gene, should use an architecture specific solution.
139 MPI_Get_processor_name(mpi_hostname, &resultlen);
141 /* The string hash function returns an unsigned int. We cast to an int.
142 * Negative numbers are converted to positive by setting the sign bit to 0.
143 * This makes the hash one bit smaller.
144 * A 63-bit hash (with 64-bit int) should be enough for unique node hashes,
145 * even on a million node machine. 31 bits might not be enough though!
148 (int)gmx_string_fullhash_func(mpi_hostname, gmx_string_hash_init);
158 #if defined GMX_LIB_MPI && defined GMX_TARGET_BGQ
160 /* IBM's declaration of this function in
161 * /bgsys/drivers/V1R2M2/ppc64/spi/include/kernel/process.h
162 * erroneously fails to specify __INLINE__, despite
163 * /bgsys/drivers/V1R2M2/ppc64/spi/include/kernel/cnk/process_impl.h
164 * specifiying __INLINE__, so bgclang thinks they are different enough
165 * to complain about. */
166 static uint64_t Kernel_GetJobID();
168 #include <spi/include/kernel/location.h>
170 static int bgq_nodenum(void)
173 Personality_t personality;
174 Kernel_GetPersonality(&personality, sizeof(personality));
175 /* Each MPI rank has a unique coordinate in a 6-dimensional space
176 (A,B,C,D,E,T), with dimensions A-E corresponding to different
177 physical nodes, and T within each node. Each node has sixteen
178 physical cores, each of which can have up to four hardware
179 threads, so 0 <= T <= 63 (but the maximum value of T depends on
180 the confituration of ranks and OpenMP threads per
181 node). However, T is irrelevant for computing a suitable return
182 value for gmx_hostname_num().
184 hostnum = personality.Network_Config.Acoord;
185 hostnum *= personality.Network_Config.Bnodes;
186 hostnum += personality.Network_Config.Bcoord;
187 hostnum *= personality.Network_Config.Cnodes;
188 hostnum += personality.Network_Config.Ccoord;
189 hostnum *= personality.Network_Config.Dnodes;
190 hostnum += personality.Network_Config.Dcoord;
191 hostnum *= personality.Network_Config.Enodes;
192 hostnum += personality.Network_Config.Ecoord;
197 "Torus ID A: %d / %d B: %d / %d C: %d / %d D: %d / %d E: %d / %d\n"
198 "Node ID T: %d / %d core: %d / %d hardware thread: %d / %d\n",
199 personality.Network_Config.Acoord,
200 personality.Network_Config.Anodes,
201 personality.Network_Config.Bcoord,
202 personality.Network_Config.Bnodes,
203 personality.Network_Config.Ccoord,
204 personality.Network_Config.Cnodes,
205 personality.Network_Config.Dcoord,
206 personality.Network_Config.Dnodes,
207 personality.Network_Config.Ecoord,
208 personality.Network_Config.Enodes,
209 Kernel_ProcessorCoreID(),
211 Kernel_ProcessorID(),
213 Kernel_ProcessorThreadID(),
220 int gmx_physicalnode_id_hash(void)
227 #ifdef GMX_THREAD_MPI
228 /* thread-MPI currently puts the thread number in the process name,
229 * we might want to change this, as this is inconsistent with what
230 * most MPI implementations would do when running on a single node.
234 #ifdef GMX_TARGET_BGQ
235 hash = bgq_nodenum();
237 hash = mpi_hostname_hash();
244 fprintf(debug, "In gmx_physicalnode_id_hash: hash %d\n", hash);
251 void gmx_abort(int errorno)
253 const char *programName = "GROMACS";
256 programName = gmx::getProgramContext().displayName();
258 catch (const std::exception &)
261 const int nnodes = gmx_node_num();
262 const int noderank = gmx_node_rank();
265 std::fprintf(stderr, "Halting parallel program %s on rank %d out of %d\n",
266 programName, noderank, nnodes);
270 std::fprintf(stderr, "Halting program %s\n", programName);
273 MPI_Abort(MPI_COMM_WORLD, errorno);