Date: Thu, 20 Mar 2003 21:57:01 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: current@freebsd.org Subject: Re: cvs commit: src/usr.sbin Makefile src/usr.sbin/gstat Makefile gstat.c Message-ID: <1286.1048193821@critter.freebsd.dk> In-Reply-To: Your message of "Thu, 20 Mar 2003 12:48:41 PST." <200303202048.h2KKmgOK057174@repoman.freebsd.org>
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In message <200303202048.h2KKmgOK057174@repoman.freebsd.org>, Poul-Henning Kamp
writes:
>phk 2003/03/20 12:48:41 PST
>
> Log:
> Add a rudimentary gstat(8) to the system.
The GEOM/devstat statistics has very fine granularity and can be
read with very high resolution if one wants to.
This means that you can see exactly how much of your disk-I/O comes
from for instance your /var filesystem, and you can see how it is
distributed over time down to the millisecond level.
"This is one of the most significant sources we have on the subject,
unfortunately we cannot decipher it, so it is utterly insignificant"
-- Robert Storm Petersen
This program however, is a just a small, almost minimal, proof-of-concept
to show how to pick up the stats and make some amount of sense out
of them.
I am no great curses programmer[1], and the messes I make increase
in size with the distance I move away from the hardware, so I really
hope somebody will take a fancy to this gadget and turn it into the
tool it should end up as.
Poul-Henning
[1] see sysinstall's disk editor.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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