Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3)

Suparna Bhattacharya
2007-02-23T15:11:32Z

On Fri, Feb 23, 2007 at 03:58:26PM +0100, Ingo Molnar wrote:
>
> * Suparna Bhattacharya <suparna@in.ibm.com> wrote:
>
> > As a really crude (and not very realistic) example of the potential
> > impact of large numbers of outstanding IOs, I tried some quick direct
> > IO comparisons using fio:
> >
> > [global]
> > ioengine=syslet-rw
> > buffered=0
> > rw=randread
> > bs=64k
> > size=1024m
> > iodepth=64
>
> could you please try those iodepth=20000 tests with the latest
> fio-testing branch of fio as well? Jens wrote a new, smarter syslet
> plugin for FIO. You'll need the v3 syslet kernel plus:
>
> git-clone git://git.kernel.dk/data/git/fio.git
> cd fio
> git-checkout syslet-testing
>
> my expectation is that it should behave better with iodepth=20000
> (although i havent tried that yet).

I picked up the fio snapshot from 22nd Feb (fio-git-20070222212513.tar.gz)
and used the v3 syslet patches from your web-site.

Do I still need to get something more recent ?

Regards
Suparna

>
> Ingo

--
Suparna Bhattacharya (suparna@in.ibm.com)
Linux Technology Center
IBM Software Lab, India