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| author | Zhen Lei <[email protected]> | 2021-08-11 11:48:50 +0000 |
|---|---|---|
| committer | Will Deacon <[email protected]> | 2021-08-13 13:17:16 +0000 |
| commit | 4537f6f1e2d8d22ec6f9c6bd3844fdccb931f46e (patch) | |
| tree | 88d40e19c0855c55209055fd13d29030a9fcdfff /lib/netdev-notifier-error-inject.c | |
| parent | iommu/arm-smmu-v3: Use command queue batching helpers to improve performance (diff) | |
| download | kernel-4537f6f1e2d8d22ec6f9c6bd3844fdccb931f46e.tar.gz kernel-4537f6f1e2d8d22ec6f9c6bd3844fdccb931f46e.zip | |
iommu/arm-smmu-v3: Add and use static helper function arm_smmu_cmdq_issue_cmd_with_sync()
The obvious key to the performance optimization of commit 587e6c10a7ce
("iommu/arm-smmu-v3: Reduce contention during command-queue insertion") is
to allow multiple cores to insert commands in parallel after a brief mutex
contention.
Obviously, inserting as many commands at a time as possible can reduce the
number of times the mutex contention participates, thereby improving the
overall performance. At least it reduces the number of calls to function
arm_smmu_cmdq_issue_cmdlist().
Therefore, function arm_smmu_cmdq_issue_cmd_with_sync() is added to insert
the 'cmd+sync' commands at a time.
Signed-off-by: Zhen Lei <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>
Diffstat (limited to 'lib/netdev-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions