Re: [BENCHMARK] vm swappiness with contest

Con Kolivas (conman@kolivas.net)
Tue, 31 Dec 2002 17:57:50 +1100


On Tuesday 31 Dec 2002 5:37 pm, Andrew Morton wrote:
> Con Kolivas wrote:
> > On Tuesday 31 Dec 2002 5:08 pm, Andrew Morton wrote:
> > > Con Kolivas wrote:
> > > > -----BEGIN PGP SIGNED MESSAGE-----
> > > > Hash: SHA1
> > > >
> > > > On Saturday 28 Dec 2002 5:16 pm, Con Kolivas wrote:
> > > > > Is there something about the filesystem layer or elsewhere in the
> > > > > kernel that could decay or fragment over time that only a reboot
> > > > > can fix? This would seem to be a bad thing.
> > > >
> > > > Ok Linus suggested I check slabinfo before and after.
> > > >
> > > > I ran contest for a few days till I recreated the problem and it did
> > > > recur. I don't know how to interpret the information so I'll just
> > > > dump it here:
> > >
> > > Looks OK. Could we see /proc/meminfo and /proc/vmstat?
> >
> > meminfo:
> > MemTotal: 257296 kB
> > MemFree: 47468 kB
> > Buffers: 27028 kB
> > Cached: 7480 kB
> > SwapCached: 272 kB
> > Active: 154968 kB
> > Inactive: 42756 kB
> > HighTotal: 0 kB
> > HighFree: 0 kB
> > LowTotal: 257296 kB
> > LowFree: 47468 kB
> > SwapTotal: 4194272 kB
> > SwapFree: 4193816 kB
> > Dirty: 1116 kB
> > Writeback: 0 kB
> > Mapped: 3740 kB
> > Slab: 8564 kB
> > Committed_AS: 6580 kB
> > PageTables: 196 kB
> > ReverseMaps: 1381
>
> These numbers _look_ wrong, but ext3 truncate does funny things.
> Could you now run a big usemem/fillmem application to try to allocate and
> use 200 megs of memory, then resend /proc/meminfo?

post usemem:
MemTotal: 257296 kB
MemFree: 86168 kB
Buffers: 392 kB
Cached: 2244 kB
SwapCached: 632 kB
Active: 159484 kB
Inactive: 1380 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 257296 kB
LowFree: 86168 kB
SwapTotal: 4194272 kB
SwapFree: 4192668 kB
Dirty: 60 kB
Writeback: 0 kB
Mapped: 1768 kB
Slab: 6748 kB
Committed_AS: 6588 kB
PageTables: 196 kB
ReverseMaps: 619

Con
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