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openib: Disable CUDA async by default #5748

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Merged
merged 1 commit into from
Sep 24, 2018
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openib: Disable CUDA async by default #5748

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2 changes: 1 addition & 1 deletion opal/mca/btl/openib/btl_openib_mca.c
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Original file line number Diff line number Diff line change
Expand Up @@ -560,7 +560,7 @@ int btl_openib_register_mca_params(void)
CHECK(reg_bool("cuda_async_recv", NULL,
"Enable or disable CUDA async recv copies "
"(true = async; false = sync)",
true, &mca_btl_openib_component.cuda_async_recv));
false, &mca_btl_openib_component.cuda_async_recv));
/* Also make the max send size larger for better GPU buffer performance */
mca_btl_openib_module.super.btl_max_send_size = 128 * 1024;
/* Turn of message coalescing - not sure if it works with GPU buffers */
Expand Down