Re: I/O performance measurement tools on Linux

[Jens Axboe <axboe@suse.de>]

On Tue, Mar 28 2006, Douglas Gilbert wrote:
> Ju, Seokmann wrote:
> > Hi,
> > 
> > Are there any performance measurement tools available that running on
> > Linux?
> > I would like to measure disk I/O performance (file system and raw I/O)
> > on several kernels.
> > Please lead me to the place.
> 
> The sg3_utils package may help with some raw SCSI
> and SATA disk I/O measurements.
> sg_dd, sgp_dd and sgm_dd are dd variants that
> let you tweak a lot of low level details. The sg_read
> utility can be used to measure disk cache throughput,
> transport speeds and command overhead.

I wrote a little fio tool that can be used as well, it can use various
types of io engines: libaio, posixaio, regular sync io, direct io, and
SG_IO io. You can write simple job files for it, there are some examples
included in the tar ball.

http://brick.kernel.dk/snaps/

Just grab the latest snapshot, that's usually the least buggy version
:-)

-- 
Jens Axboe