| commit | a6b7fb764ed2a6b7bb1ac96d93c06787aa589092 | [log] [tgz] |
|---|---|---|
| author | Dan Williams <dan.j.williams@intel.com> | Wed Nov 11 16:27:38 2015 -0800 |
| committer | Tejun Heo <tj@kernel.org> | Mon Nov 16 11:29:10 2015 -0500 |
| tree | 02bd0d5a1aa33e2fa3cb509ca4607b9ff11558bc | |
| parent | d684a90d38e24dcaf95fdb32c83efe05f80d152a [diff] |
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>