Re: [PATCH 4/4] mm: numa: Slow PTE scan rate if migration failures occur

Ingo Molnar
2015-03-08T09:41:41Z

* Mel Gorman <mgorman@suse.de> wrote:

> xfsrepair
> 4.0.0-rc1 4.0.0-rc1 3.19.0
> vanilla slowscan-v2 vanilla
> Min real-fsmark 1157.41 ( 0.00%) 1150.38 ( 0.61%) 1164.44 ( -0.61%)
> Min syst-fsmark 3998.06 ( 0.00%) 3988.42 ( 0.24%) 4016.12 ( -0.45%)
> Min real-xfsrepair 497.64 ( 0.00%) 456.87 ( 8.19%) 442.64 ( 11.05%)
> Min syst-xfsrepair 500.61 ( 0.00%) 263.41 ( 47.38%) 194.97 ( 61.05%)
> Amean real-fsmark 1166.63 ( 0.00%) 1155.97 ( 0.91%) 1166.28 ( 0.03%)
> Amean syst-fsmark 4020.94 ( 0.00%) 4004.19 ( 0.42%) 4025.87 ( -0.12%)
> Amean real-xfsrepair 507.85 ( 0.00%) 459.58 ( 9.50%) 447.66 ( 11.85%)
> Amean syst-xfsrepair 519.88 ( 0.00%) 281.63 ( 45.83%) 202.93 ( 60.97%)
> Stddev real-fsmark 6.55 ( 0.00%) 3.97 ( 39.30%) 1.44 ( 77.98%)
> Stddev syst-fsmark 16.22 ( 0.00%) 15.09 ( 6.96%) 9.76 ( 39.86%)
> Stddev real-xfsrepair 11.17 ( 0.00%) 3.41 ( 69.43%) 5.57 ( 50.17%)
> Stddev syst-xfsrepair 13.98 ( 0.00%) 19.94 (-42.60%) 5.69 ( 59.31%)
> CoeffVar real-fsmark 0.56 ( 0.00%) 0.34 ( 38.74%) 0.12 ( 77.97%)
> CoeffVar syst-fsmark 0.40 ( 0.00%) 0.38 ( 6.57%) 0.24 ( 39.93%)
> CoeffVar real-xfsrepair 2.20 ( 0.00%) 0.74 ( 66.22%) 1.24 ( 43.47%)
> CoeffVar syst-xfsrepair 2.69 ( 0.00%) 7.08 (-163.23%) 2.80 ( -4.23%)
> Max real-fsmark 1171.98 ( 0.00%) 1159.25 ( 1.09%) 1167.96 ( 0.34%)
> Max syst-fsmark 4033.84 ( 0.00%) 4024.53 ( 0.23%) 4039.20 ( -0.13%)
> Max real-xfsrepair 523.40 ( 0.00%) 464.40 ( 11.27%) 455.42 ( 12.99%)
> Max syst-xfsrepair 533.37 ( 0.00%) 309.38 ( 42.00%) 207.94 ( 61.01%)

Btw., I think it would be nice if these numbers listed v3.19
performance in the first column, to make it clear at a glance
how much regression we still have?

Thanks,

Ingo