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| author | Jens Axboe <[email protected]> | 2020-02-25 15:47:30 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2020-02-25 15:57:37 +0000 |
| commit | 3030fd4cb783377eca0e2a3eee63724a5c66ee15 (patch) | |
| tree | 6949a688812bbf7a87aaea690873598364e4eb2a /tools/perf/scripts/python/check-perf-trace.py | |
| parent | io_uring: fix poll_list race for SETUP_IOPOLL|SETUP_SQPOLL (diff) | |
| download | kernel-3030fd4cb783377eca0e2a3eee63724a5c66ee15.tar.gz kernel-3030fd4cb783377eca0e2a3eee63724a5c66ee15.zip | |
io-wq: remove spin-for-work optimization
Andres reports that buffered IO seems to suck up more cycles than we
would like, and he narrowed it down to the fact that the io-wq workers
will briefly spin for more work on completion of a work item. This was
a win on the networking side, but apparently some other cases take a
hit because of it. Remove the optimization to avoid burning more CPU
than we have to for disk IO.
Reported-by: Andres Freund <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions