Re: VM test on 2.4.13-pre3aa1 (compared to 2.4.12-aa1 and 2.4.13-pre2aa1)

[Andrea Arcangeli]

On Wed, Oct 17, 2001 at 02:12:42AM +0200, Andrea Arcangeli wrote:
> >  3  3  0  47424   3788   1172   1412 860 40228   892 40236  789   819  12  23  66
> >  0  5  1  90244   1656   1184   1416 1032 39568  1076 39572  653   425   6   5  89
> 
> those swapins could be due mp3blast that is getting swapped out
> continously while it sleeps.  Not easy for the vm to understand it has

I noticed that anotehr thing that changed between vanilla 2.4.13pre2 and
2.4.13pre3 is the setting of page_cluster on machine with lots of ram.

You'll now find the page_cluster set to 6, that means "1 << 6 << 12"
bytes will be paged in at each major fault, while previously only "1 <<
4 << 12" bytes were paged in.

So I'd suggest to try again after "echo 4 > /proc/sys/vm/page-cluster"
to see if it makes any difference.

Andrea