iommu/vt-d: Add cache invalidation latency sampling

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Queued invalidation execution time is performance critical and needs
to be monitored. This adds code to sample the execution time of IOTLB/
devTLB/ICE cache invalidation.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210520031531.712333-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20210610020115.1637656-16-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2021-06-10 10:01:07 +08:00 • committed by Joerg Roedel

parent 456bb0b97f

commit 74eb87a0f9

1 changed files with 31 additions and 0 deletions

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drivers/iommu/intel/dmar.c

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