htrdr

commit 8c8732ca69a4897f7b71244222446cfa0664d110
parent edab4a8edd400e580fe0850f87423e45f6df25f9
Author: Vincent Forest <vincent.forest@meso-star.com>
Date:   Fri, 14 Feb 2025 15:33:19 +0100

core: adjustments to distribution policy

Query steal requests more frequently and steal more work. Overheads are
negligible and this improves work balance when using very heterogeneous
computers.

Diffstat:
M
src/core/htrdr_proc_work.c
 | 
4
++--

1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/core/htrdr_proc_work.c b/src/core/htrdr_proc_work.c
@@ -197,7 +197,7 @@ mpi_probe_thieves
     }
 
     /* Don't constantly check for thieves */
-    t.tv_nsec = 500000000; /* 500ms */
+    t.tv_nsec = 10000000; /* 10ms */
     nanosleep(&t, NULL);
   }
   #undef P_MPI
@@ -216,7 +216,7 @@ mpi_steal_work
   int proc_to_steal; /* Rank of the process to steal */
 
   /* Empircally set the number of chunks to steal */
-  const uint8_t nchunks_to_steal = MMIN((uint8_t)(htrdr->nthreads*2), 16);
+  const uint8_t nchunks_to_steal = MMIN((uint8_t)(htrdr->nthreads*4), 32);
   uint8_t i = 0;
 
   ASSERT(htrdr && rng && work && htrdr->nthreads < UINT8_MAX);