lkml.org 
[lkml]   [1999]   [Jan]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [patch] arca-vm-19 [Re: Results: Zlatko's new vm patch]
Date
> 
> On Wed, 13 Jan 1999, Andrea Arcangeli wrote:
>
> > I produced a new arca-vm-19. I would like if you could try it. I don't
>
> It seems that the better algorithm I am be able to invent is been the
> growing_swap_cache one (the one in arca-vm-16). Steve could you try this
> new patch (arca-vm-20) against real 2.2.0-pre7? I think that it should be
> still better than arca-vm-16 + SWAP_CLUSTER_MAX=512.
>
> If it will be not very good could you do:
>
> echo 8 2 4 512 512 512 > /proc/sys/vm/pager
>
> and try again? (such numbers should be the same of setting
> SWAP_CLUSTER_MAX in arca-vm-16, but as default only the max_async_pages is
> set to 512 because I think it's been the only one that made a difference).
>
> If this will be not the best again you could apply the filemap.c patch I
> sent you in the last email (the one that return to put the shrink_mmap()
> weight exponential increasing in function of priority) and try again?
>

Hi Andrea!

I tested vm20 against bare 2.2.0-pre7 and it doesn't do the job 8*(


The system is a little bit more responsive while doing a 12G mke2fs
now only taking about 10-20 seconds ;-( to bring up another kvt
compared to end of mke2fs without vm20.

But compared to < 2.2.0 VM this is about at least 10-20!!! times slower.


The system (2*PII/350, 256M RAM) swaps out 30MB (kvts etc.) for _no_
obvious reason with paging rates up to > 100/s ?!
I don't like 1 process eating up main memory for buffer/page cache
_and_ thereby causing swaping out inactive others.

Other testers reported the same effect, if the system runs
for some days under medium load.

/proc,sys/vm/{buffermemm, pagecache} are gone now because they haven't been
used any longer, but at least i liked them.
Why not keep that interface and the thereby implied limits in the kernel
VM to allow the admin to set them to 100% if he likes to?

Sorry if this sounds too bad, but to my opinion this behaviour is an absolute
_must_ change before the final 2.2 release!

Keep up the good work,
Heinz

--

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Systemmanagement Entwicklungsbereich 2 Deutsche Telekom AG
Entwicklungszentrum Darmstadt
Heinz Mauelshagen Otto-Roehm-Strasse 71c
Postfach 10 05 41
mge@ez-darmstadt.telekom.de 64205 Darmstadt
Germany
+49 6151 886-425
FAX-386
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:49    [from the cache]
©2003-2011 Jasper Spaans