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SubjectRe: 2.4.17pre1aa1
On Thu, 29 Nov 2001, Andrew Morton wrote:

> Andrea Arcangeli wrote:
> >
> > Only in 2.4.15aa1: 10_vm-17
> > Only in 2.4.17pre1aa1: 10_vm-18
> >
> > Minor vm tweaks in function of the feedback received.
> > Included Andrews' dirty += BUF_LOCKED.
> >
>
> OK. One think I notice is that you've also decreased nfract,nfract_sync
> from (40%,60%) to (20%,40%). So taken together, these changes mean
> that we'll start writeout much earlier, and will block writers much
> earlier. What's the thinking here?
>
> I received some interesting results from Mike Galbraith today.

2.4.17-pre1aa1
real 7m39.066s
user 6m38.400s
sys 0m29.140s

user : 0:06:44.82 76.1% page in : 536247
nice : 0:00:00.00 0.0% page out: 466800
system: 0:00:45.45 8.5% swap in : 106783
idle : 0:01:21.89 15.4% swap out: 111683

__alloc_pages: 0-order allocation failed (gfp=0xf0/0) (only the one)

IO contrast...

2.5.1-pre1
real 7m54.873s
user 6m41.070s
sys 0m30.170s

user : 0:06:47.35 72.6% page in : 661891
nice : 0:00:00.00 0.0% page out: 708836
system: 0:00:47.42 8.5% swap in : 140234
idle : 0:01:46.26 18.9% swap out: 172775

-Mike

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