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| author | Dan Williams <dan.j.williams@intel.com> | 2015-11-11 16:27:38 -0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2015-11-16 11:29:10 -0500 |
| commit | a6b7fb764ed2a6b7bb1ac96d93c06787aa589092 (patch) | |
| tree | 02bd0d5a1aa33e2fa3cb509ca4607b9ff11558bc /drivers/cpuidle | |
| parent | d684a90d38e24dcaf95fdb32c83efe05f80d152a (diff) | |
| download | linux-stable-a6b7fb764ed2a6b7bb1ac96d93c06787aa589092.tar.gz linux-stable-a6b7fb764ed2a6b7bb1ac96d93c06787aa589092.tar.bz2 linux-stable-a6b7fb764ed2a6b7bb1ac96d93c06787aa589092.zip | |
ahci: switch from 'threaded' to 'hardirq' interrupt handling
For high frequency I/O the overhead of threaded interrupts impacts
performance. A quick out-of-the-box test (i.e. no affinity tuning)
shows ~10% random read performance at ~20% less cpu. The cpu wins
appear to be from reduced lock contention.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/cpuidle')
0 files changed, 0 insertions, 0 deletions