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| author |   Zhen Lei <thunder.leizhen@huawei.com> | 2021-08-11 19:48:50 +0800 |
|---|---|---|
| committer |   Will Deacon <will@kernel.org> | 2021-08-13 14:17:16 +0100 |
| commit | 4537f6f1e2d8d22ec6f9c6bd3844fdccb931f46e (patch) | |
| tree | 88d40e19c0855c55209055fd13d29030a9fcdfff /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | iommu/arm-smmu-v3: Use command queue batching helpers to improve performance (diff) | |
| download | wireguard-linux-4537f6f1e2d8d22ec6f9c6bd3844fdccb931f46e.tar.xz wireguard-linux-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 <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210811114852.2429-3-thunder.leizhen@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions