* Re: [Bug 890] New: performance regression compared to 2.4.20 under
@ 2003-07-10 8:45 Samium Gromoff
0 siblings, 0 replies; only message in thread
From: Samium Gromoff @ 2003-07-10 8:45 UTC (permalink / raw)
To: akpm, mbligh; +Cc: linux-kernel
Andrew Morton <akpm@osdl.org> wrote:
> "Martin J. Bligh" <mbligh@aracnet.com> wrote:
> >
> > As can be seen, the differences are quite significant, about three seconds on
> > average, which I believe may be related to the increased swapping time I have
> > encountered.
>
> The 2.4 VM's virtual scan has the effect of swapping out one process at a
> time. 2.5's physical(ish) scan doesn't have that side-effect.
>
> It means that in 2.4, the lucky processes can make decent progress. In
> 2.5, everyone makes equal progress and everyone thrashes everyone else to
> bits.
I have precisely the same problem on my p166-16M RAM.
Disk/controller are fast, and dma is on.
2.4 runs much much faster. Remote shell logins are more than twice as fast.
Needless to say it runs 2.4 ;-)
--
Cheers, Samium Gromoff
regards, Samium Gromoff
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2003-07-10 8:45 [Bug 890] New: performance regression compared to 2.4.20 under Samium Gromoff
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