* Re: pmap revisited
@ 2001-09-04 4:07 Samium Gromoff
0 siblings, 0 replies; 3+ messages in thread
From: Samium Gromoff @ 2001-09-04 4:07 UTC (permalink / raw)
To: linux-kernel; +Cc: marcelo, riel
damn, i even sometimes should think before writing things
like "swapoff of reiserfs"... ;( automatism => errors
cheers,
Sam
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: pmap revisited
2001-09-04 3:13 Samium Gromoff
@ 2001-09-04 16:16 ` Rik van Riel
0 siblings, 0 replies; 3+ messages in thread
From: Rik van Riel @ 2001-09-04 16:16 UTC (permalink / raw)
To: Samium Gromoff; +Cc: linux-kernel, marcelo
On Tue, 4 Sep 2001, Samium Gromoff wrote:
> Gotta wrong results in my previous perftest... (slightly different
> environments), so these are to be sure that on low VM load there isnt
> any significant difference...
As expected, the current patch only modifies mechanisms and
leaves most policy the same. Under some loads there is a
difference, but under light VM loads the same-policy-more-info
replacement should indeed be pretty similar.
> Bonus: two bugs! :)
> 1. Quintela`s (shmtest of memtest) and pmap{2,3} == 100% instant deadlock
> plain ac12 demonstrates ignorance.
I'll try to reproduce that one when I get back home thursday.
> 2. Swapoff oops 100% - only in pmap3! (okay, swapoff of reiserfs
> to be strict, but i think that doesnt actually matters)
> swapoff oops will be in next mail.
This one is fixed. I'll be sitting inside a big tin can with
wings all day tomorrow, but thursday I'll try to post a new
version, hopefully with both these bugs fixed.
Thanks for testing the patch and pointing out the bugs!
regards,
Rik
--
IA64: a worthy successor to i860.
http://www.surriel.com/ http://distro.conectiva.com/
Send all your spam to aardvark@nl.linux.org (spam digging piggy)
^ permalink raw reply [flat|nested] 3+ messages in thread
* pmap revisited
@ 2001-09-04 3:13 Samium Gromoff
2001-09-04 16:16 ` Rik van Riel
0 siblings, 1 reply; 3+ messages in thread
From: Samium Gromoff @ 2001-09-04 3:13 UTC (permalink / raw)
To: linux-kernel; +Cc: marcelo, riel
Ashes on my head guys...
Gotta wrong results in my previous perftest... (slightly different
environments), so these are to be sure that on low VM load there isnt
any significant difference...
Here are new and revisited. Actually i maked sure that the environments
differs only in kernels...
Bonus: two bugs! :)
1. Quintela`s (shmtest of memtest) and pmap{2,3} == 100% instant deadlock
plain ac12 demonstrates ignorance.
2. Swapoff oops 100% - only in pmap3! (okay, swapoff of reiserfs
to be strict, but i think that doesnt actually matters)
swapoff oops will be in next mail.
Revisited results:
time find / -xdev - done 5 times
pmap 3
real 1m5.175s
real 1m4.699s
real 1m3.579s
============================
pmap 2
real 1m5.039s
real 1m4.779s
real 1m4.506s
============================
plain
real 1m4.820s
real 1m4.433s
real 1m4.285s
* fillmem == (fillmem of memtest)
* dont count on differences - they are quite flaky, one is only known:
there are no much difference anyways...
time fillmem - done 7 times, still giving strange results sometimes...
pmap 3
real 1m2.709s
real 1m2.417s
real 1m1.371s
real 1m1.241s
real 1m0.235s
(1m3.~, 1m4.5~) - add results
============================
pmap 2
real 1m5.294s
real 1m5.169s
real 1m4.431s
real 1m3.878s
real 1m3.523s
(1m6.~, 1m0.~, 1m3.355) - add results
============================
plain
real 1m1.570s
real 1m1.063s
real 1m1.007s
real 1m0.201s
real 0m59.677s
^ permalink raw reply [flat|nested] 3+ messages in thread
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