Displaying 1 result from an estimated 1 matches for "rq_noidle".
2010 Jul 06
0
[PATCH 0/6 v6][RFC] jbd[2]: enhance fsync performance when using CFQ
...nish an fs_mark run
> in 30 seconds. I had to bump the time of the test up to 5 minutes, and then
> CFQ saw an fs_mark performance of 6.6 files/second and sequential reader
> throughput of 137.2MB/s.
>
> The fs_mark process was being starved as the WRITE_SYNC I/O is marked
> with RQ_NOIDLE, and regular WRITES are part of the async workload by
> default. So, a single request would be served from either the fs_mark
> process or the journal thread, and then they would give up the I/O
> scheduler.
>
> After applying this patch set, CFQ can now perform 113.2 files/second w...