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[v4.1.x] mtl/ofi: Disable CUDA convertor for specified ofi providers #8821

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Merged
merged 1 commit into from
Apr 19, 2021
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[v4.1.x] mtl/ofi: Disable CUDA convertor for specified ofi providers #8821

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13 changes: 13 additions & 0 deletions ompi/mca/mtl/ofi/mtl_ofi_component.c
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Original file line number Diff line number Diff line change
Expand Up @@ -900,6 +900,19 @@ ompi_mtl_ofi_component_init(bool enable_progress_threads,
prov->domain_attr->mr_mode = FI_MR_BASIC;
}

#if OPAL_CUDA_SUPPORT
/**
* Some providers do not require the use of the CUDA convertor
* in OMPI and its use will cause performance degradation. The
* following providers will disable it when selected.
*/
if (!strncmp(prov->fabric_attr->prov_name, "psm3", 4)
|| !strncmp(prov->fabric_attr->prov_name, "psm2", 4))
{
ompi_mtl_ofi.base.mtl_flags |= MCA_MTL_BASE_FLAG_CUDA_INIT_DISABLE;
}
#endif /* OPAL_CUDA_SUPPORT */

/**
* Create the access domain, which is the physical or virtual network or
* hardware port/collection of ports. Returns a domain object that can be
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