Re: 2.4.0-test7-vmpatch2 very sluggish on Toshiba laptop

From: Goblin (
Date: Wed Aug 30 2000 - 18:29:14 EST

On 08/30, Rik van Riel rearranged the electrons to read:
> On Wed, 30 Aug 2000, Goblin wrote:
> > I am running Mandrake 7.1, pretty much stock with all the updates. I
> > would like to know how I might go about determining why my system is
> > incredibly sluggish using new kernels. Stock Mandrake kernels run great.
> >
> > I guess I wanted to know if there was anyone else having the
> > same experience. Specifically, X is where I notice it the most.
> > Even Eterm takes forever to scroll a little. No disk activity.
> "No disk activity" indicates that it's probably not VM activity
> keeping you back...

Agreed. I have to think it's a coincidence I'm running vmpatch2.

> > All this is probably not enough info, so if anyone can help me at least
> > supply enough info to help solve my problem, I'd be in debt to them.
> If you run 'top' or 'vmstat', is there a big difference in output
> between what 2.2 and 2.4 tell you?

vmstat look the same, but here's some timings of bunzip'ing the kernel
source into a file (notice pagefaults and swaps):

This is under 2.2.16-9mdk:
31.50 user 1.17 system 0:34.68 elapsed 94%CPU
(0avgtext+0avgdata 0maxresident)k

This is under 2.4.0-test7-vmpatch2b:
265.58 user 8.91 system 5:18.06 elapsed 86%CPU
(0avgtext+0avgdata 0maxresident)k

 Your eyes are weary from staring at the CRT. You feel sleepy. Notice how
 restful it is to watch the cursor blink. Close your eyes. The opinions
 stated above are yours. You cannot imagine why you ever felt otherwise.

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