Tao Ma <tao.ma@xxxxxxxxxx> writes: > Hi Jeff, > > On 06/23/2010 05:34 AM, Jeff Moyer wrote: >> Hi, >> >> Running iozone with the fsync flag, or fs_mark, the performance of CFQ is >> far worse than that of deadline for enterprise class storage when dealing >> with file sizes of 8MB or less. I used the following command line as a >> representative test case: >> >> fs_mark -S 1 -D 10000 -N 100000 -d /mnt/test/fs_mark -s 65536 -t 1 -w 4096 -F >> >> When run using the deadline I/O scheduler, an average of the first 5 numbers >> will give you 448.4 files / second. CFQ will yield only 106.7. With >> this patch series applied (and the two patches I sent yesterday), CFQ now >> achieves 462.5 files / second. > which 2 patches? Could you paste the link or the subject? Just want to > make my test env like yours. ;) > As Joel mentioned in another mail, ocfs2 also use jbd/jbd2, so I'd > like to give it a try and give you some feedback about the test. http://lkml.org/lkml/2010/6/21/307: [PATCH 1/2] cfq: always return false from should_idle if slice_idle is set to zero [PATCH 2/2] cfq: allow dispatching of both sync and async I/O together Thanks in advance for the testing! -Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
