On Wed, 4 Jul 2007, Michael Tokarev wrote:
Tejun Heo wrote:
Hello,
Michael Tokarev wrote:
Well. It looks like the results does not depend on the
elevator. Originally I tried with deadline, and just
re-ran the test with noop (hence the long delay with
the answer) - changing linux elevator changes almost
nothing in the results - modulo some random "fluctuations".
I see. Thanks for testing.
Here are actual results - the tests were still running when
I replied yesterday.
Again, this is Seagate ST3250620AS "desktop" drive, 7200RPM,
16Mb cache, 250Gb capacity. The tests were performed with
queue depth = 64 (on mptsas), drive write cache is turned
off.
I found AS scheduler to be the premium and best for single-user performance.
You want speed? Use AS.
http://home.comcast.net/~jpiszcz/sched/cfq_vs_as_vs_deadline_vs_noop.html
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