mirror of
git://nv-tegra.nvidia.com/linux-nvgpu.git
synced 2025-12-22 17:36:20 +03:00
1c991a58af
To achieve permanent fault coverage, the CTAs launched by each kernel in the mission and redundant contexts must execute on different hardware resources. This feature proposes modifications in the software to modify the virtual SM id to TPC mapping across the mission and redundant contexts. The virtual SM identifier to TPC mapping is done by nvgpu when setting up the patch context. The recommendation for the redundant setting is to offset the assignment by one TPC, and not by one GPC. This will ensure that both GPC and TPC diversity. The SM and Quadrant diversity will happen naturally. For kernels with few CTAs, the diversity is guaranteed to be 100%. In case of completely random CTA allocation, e.g. large number of CTAs in the waiting queue, the diversity is 1 - 1/#SM, or 87.5% for GV11B, 97.9% for TU104. Added NvGpu CFLAGS to enable/disable the SM diversity support "CONFIG_NVGPU_SM_DIVERSITY". This support is only enabled on gv11b and tu104 QNX non safety build. JIRA NVGPU-4685 Change-Id: I8e3eaa72d8cf7aff97f61e4c2abd10b2afe0fe8b Signed-off-by: Lakshmanan M <lm@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2268026 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com> Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com> Reviewed-by: Shashank Singh <shashsingh@nvidia.com> Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com> Reviewed-by: Automatic_Commit_Validation_User GVS: Gerrit_Virtual_Submit Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>