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DISK performance - BSD-like iostat

daemon@ATHENA.MIT.EDU (Lars Wirzenius)
Thu Jul 13 10:00:10 1995

Date: Wed, 12 Jul 1995 17:43:28 +0300
From: Lars Wirzenius <wirzeniu@cc.helsinki.fi>
To: linux-activists@niksula.hut.fi, linux-announce@vger.rutgers.edu

X-Mn-Key: announce

From: mjacob@feral.COM (Matthew Jacob)
Subject: DISK performance - BSD-like iostat
Newsgroups: comp.os.linux.announce
Keywords: /proc, iostat, performance, measurement, statistics
Organization: ?
Approved: linux-announce@news.ornl.gov (Lars Wirzenius)
Followup-to: comp.os.linux.development.system

Cheapie iostat.c for use with all linux that support /proc/stat.

dk measurements are in transfers/second, as that's how linux does things
(right now). I plan on more stuff, but don't know if I'll release it since
I don't want to perturb things. I've been getting very interested in
performance metrics under linux as I've been discovering the very interesting
tradeoffs between the excellent Linux buffer cache and the hideous
copyout/copyin cost for large chunks of data.

Anyway, if you want, grab ftp.feral.com:~ftp/pub/linux/iostat.c.

-matt

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