On (25/02/13 02:57), Yosry Ahmed wrote:
> > > I think we also need some high level testing (e.g. concurrent
> > >
> > > swapins/swapouts) to find that out. I think that's what Kairui's testing
> > >
> > > covers.
> > >
> >
> > I do a fair amount of high-level testing: heavy parallel (make -j36 and
> >
> > parallel dd) workloads (multiple zram devices configuration - zram0 ext4,
> >
> > zram1 writeback device, zram2 swap) w/ and w/o lockdep. In addition I also
> >
> > run these workloads under heavy memory pressure (a 4GB VM), when oom-killer
> >
> > starts to run around with a pair of scissors. But it's mostly regression
> >
> > testing.
> >
// JFI it seems your email client/service for some reason injects a lot
// of empty lines
> If we can get some numbers from these parallel workloads that would be better than the perf stats imo.
make -j24 CONFIG_PREEMPT
BASE
====
1363.64user 157.08system 1:30.89elapsed 1673%CPU (0avgtext+0avgdata 825692maxresident)k
lock stats
class name con-bounces contentions waittime-min waittime-max waittime-total waittime-avg acq-bounces acquisitions holdtime-min holdtime-max holdtime-total holdtime-avg
&pool->migrate_lock-R: 0 0 0.00 0.00 0.00 0.00 10001 702081 0.14 104.74 125571.64 0.18
&class->lock: 1 1 0.25 0.25 0.25 0.25 6320 840542 0.06 809.72 191214.87 0.23
&zspage->lock-R: 0 0 0.00 0.00 0.00 0.00 6452 664129 0.12 660.24 201888.61 0.30
&zram->table[index].lock: 0 0 0.00 0.00 0.00 0.00 1716362 3096466 0.07 811.10 365551.24 0.12
&zstrm->lock: 0 0 0.00 0.00 0.00 0.00 0 664129 1.68 1004.80 14853571.32 22.37
PATCHED
=======
1366.50user 154.89system 1:30.33elapsed 1684%CPU (0avgtext+0avgdata 825692maxresident)k
lock stats
class name con-bounces contentions waittime-min waittime-max waittime-total waittime-avg acq-bounces acquisitions holdtime-min holdtime-max holdtime-total holdtime-avg
&pool->lock#3-R: 0 0 0.00 0.00 0.00 0.00 3648 701979 0.12 44.09 107333.02 0.15
&class->lock: 0 0 0.00 0.00 0.00 0.00 5038 840434 0.06 1245.90 211814.60 0.25
zsmalloc-page-R: 0 0 0.00 0.00 0.00 0.00 0 664078 0.05 699.35 236641.75 0.36
zram-entry->lock: 0 0 0.00 0.00 0.00 0.00 0 3098328 0.06 2987.02 313339.11 0.10
&per_cpu_ptr(comp->stream, cpu)->lock: 0 0 0.00 0.00 0.00 0.00 23 664078 1.77 7071.30 14838397.61 22.34
