| commit | d34507d090ff70f0663659e70b5980248a5d6774 | |
| author | Jeff Moyer <jmoyer@redhat.com> | |
| Thu, 29 Sep 2011 09:57:11 +0000 (29 15:27 +0530) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Mon, 7 Nov 2011 20:32:39 +0000 (7 12:32 -0800) | ||
| tree | 717db9f0e082f8d2bd3fa50fe79b4f39e03cfee4 | treesnapshot (tar.gz zip) |
| parent | 4a78a06ce2ecea224c55eb2e171ea020110ecaa9 | commitdiff |
cfq: merge cooperating cfq_queues
commit df5fe3e8e13883f58dc97489076bbcc150789a21 upstream.
When cooperating cfq_queues are detected currently, they are allowed to
skip ahead in the scheduling order. It is much more efficient to
automatically share the cfq_queue data structure between cooperating processes.
Performance of the read-test2 benchmark (which is written to emulate the
dump(8) utility) went from 12MB/s to 90MB/s on my SATA disk. NFS servers
with multiple nfsd threads also saw performance increases.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
commit df5fe3e8e13883f58dc97489076bbcc150789a21 upstream.
When cooperating cfq_queues are detected currently, they are allowed to
skip ahead in the scheduling order. It is much more efficient to
automatically share the cfq_queue data structure between cooperating processes.
Performance of the read-test2 benchmark (which is written to emulate the
dump(8) utility) went from 12MB/s to 90MB/s on my SATA disk. NFS servers
with multiple nfsd threads also saw performance increases.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| block/cfq-iosched.c | diffblobblamehistory |