http://bugzilla.suse.com/show_bug.cgi?id=1131437
http://bugzilla.suse.com/show_bug.cgi?id=1131437#c9
--- Comment #9 from Jan Kara ---
OK, 4.20 with scsi_mod.use_blk_mq=0:
Amean 1 38.46 ( 0.00%) 26.94 ( 29.95%) 25.55 (
33.58%) 26.92 ( 30.00%) 26.01 ( 32.38%)
Amean 2 31.93 ( 0.00%) 31.75 ( 0.55%) 31.68 (
0.76%) 35.29 ( -10.53%) 31.71 ( 0.68%)
Amean 4 41.66 ( 0.00%) 35.14 ( 15.65%) 38.41 (
7.81%) 38.30 ( 8.08%) 36.31 ( 12.84%)
Stddev 1 5.87 ( 0.00%) 7.16 ( -21.96%) 5.83 (
0.74%) 6.77 ( -15.34%) 6.20 ( -5.72%)
Stddev 2 9.03 ( 0.00%) 8.73 ( 3.30%) 8.85 (
1.98%) 8.06 ( 10.75%) 8.66 ( 4.09%)
Stddev 4 6.11 ( 0.00%) 7.96 ( -30.25%) 7.69 (
-25.90%) 8.18 ( -33.85%) 9.60 ( -57.09%)
So the variability is still there. Will try even older kernels next week.
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