Re: [lc-devel] pre4

[Marc-Christian P. <m....@gm...>]

On Thursday 23 May 2002 15:01, Rodrigo Souza de Castro wrote:

Hi Rodrigo,

> > I've noticed, with "Page compressing" the system gets slower, and
> > stopps reacting for less than a second if you do high i/o.
> Is there any specific IO bound program you run that can make this
> slowdown more noticeable? I'd like to fix this behaviour.
i think the best program(s) to reproduce is "tar xzpf linux-2.4.18.tar.gz=
; rm=20
-rf linux-2.4.18; tar xzpf linux-2.4.18.tar.gz"

Its a Celeron 800MHz, UDMA66 IDE Disk, 256MB RAM, running Debian SID.

If i use the above program calls, Mouse in X Windows stopps reacting, eve=
n=20
Midnight Commander stops reacting for input, screen needs more time to op=
en=20
up a new session (Ctrl-A C) etc...

> > With Lockbreak, not part of Compressed Cache, there are still some
> > stopps, but i think, Rodrigo has this stuff on his ToDo-List.
> Let me get this straight. Do you still have problems when running
> compressed cache with lock-break enabled? If you do, even when the
> page cache support is disabled?
Yes, there are still some small stops if high i/o, even with page compres=
sion=20
disabled. Also, i've noticed some hours ago, my system freezes, this is w=
ith=20
Compressed Cache, Page Compression and Preempt/LockBreak. After that i've=
=20
compiled it again w/o Page compression, its up now for 3h 19mins, lemme s=
ee=20
if this works better. But i think, preempt/lockbreak stuff isn't a bad id=
ea=20
to integrate in the compressed cache code :)

> I'd set to something between 15% and 25% of your total memory size
> since we don't have adaptivity yet.
ok, i will set it :)


--=20
Kind regards
        Marc-Christian Petersen

http://sourceforge.net/projects/wolk

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