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36 #ifndef _pme_loadbal_h
37 #define _pme_loadbal_h
43 typedef struct pme_load_balancing *pme_load_balancing_t;
45 /* Initialze the PP-PME load balacing data and infrastructure */
46 void pme_loadbal_init(pme_load_balancing_t *pme_lb_p,
47 const t_inputrec *ir, matrix box,
48 const interaction_const_t *ic,
51 /* Try to adjust the PME grid and Coulomb cut-off.
52 * The adjustment is done to generate a different non-bonded PP and PME load.
53 * With separate PME nodes (PP and PME on different processes) or with
54 * a GPU (PP on GPU, PME on CPU), PP and PME run on different resources
55 * and changing the load will affect the load balance and performance.
56 * The total time for a set of integration steps is monitored and a range
57 * of grid/cut-off setups is scanned. After calling pme_load_balance many
58 * times and acquiring enough statistics, the best performing setup is chosen.
59 * Here we try to take into account fluctuations and changes due to external
60 * factors as well as DD load balancing.
61 * Returns TRUE the load balancing continues, FALSE is the balancing is done.
63 gmx_bool pme_load_balance(pme_load_balancing_t pme_lb,
70 interaction_const_t *ic,
71 struct nonbonded_verlet_t *nbv,
75 /* Restart the PME load balancing discarding all timings gathered up till now */
76 void restart_pme_loadbal(pme_load_balancing_t pme_lb, int n);
78 /* Finish the PME load balancing and print the settings when fplog!=NULL */
79 void pme_loadbal_done(pme_load_balancing_t pme_lb,
80 t_commrec *cr, FILE *fplog,
81 gmx_bool bNonBondedOnGPU);
87 #endif /* _pme_loadbal_h */