RE: 2.4.10 still slow compared to 2.4.5pre1

Tue, 25 Sep 2001 18:06:59 -0400

> With a synchronous NFS export, I'd expect the disk throughput
> to be lowered to such an extent that VM issues were not
> significant in throughput. But you have been seeing kswapd
> problems so hmmm...

We are comparing synchronous to synchronous between 2.4.5pre1 and 2.4.10 so
I wouldn't expect such a difference.

> Conceivably this is a networking problem, and not an FS/VM
> problem. There were significant changes to the softirq
> handling between 2.4.5 and 2.4.10, for example.

I don't understand what the softirq is or how that could effect performance.
If you could point me in a direction to look, I'll check that out.

> Could I suggest that you split these variables apart? Perform
> some comparative FS/VM testing between the kernels, and then
> some comparative network testing?

This was on my list of things to do, but I haven't gotten there yet. ;)
Working on it though.

> Is it possible to run the SFS clients on the same machine,
> over loopback?

I don't see me getting to this anytime in the near future. If it will tell
me what I need to know, I'll add it to my to do list.

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