From: Olaf Dietsche <olaf.dietsche@t-online.de>
To: Maciej Soltysiak <solt@dns.toxicfilms.tv>
Cc: linux-kernel@vger.kernel.org
Subject: Re: timing an application
Date: Tue, 14 Jan 2003 23:09:16 +0100 [thread overview]
Message-ID: <87vg0rjsdv.fsf@goat.bogus.local> (raw)
In-Reply-To: Pine.LNX.4.51.0301142044400.6432@dns.toxicfilms.tv
Maciej Soltysiak <solt@dns.toxicfilms.tv> writes:
> being inspired by some book about optimizing c++ code i decided to do
> timing of functions i wrote. I am using gettimeofday to set
> two timeval structs and calculate the time between them.
> But the results depend heavily on the load, also i reckon that this
> is an innacurate timing.
You will get elapsed time, which is usually not the same as used cpu
time.
> Any ideas on timing a function, or a block of code? Maybe some kernel
> timers or something.
If you're timing/pofiling some user space functions, gprof should be
sufficient. If you want to profile kernel and module functions as
well, try oprofile at <http://oprofile.sourceforge.net/>. It is part
of the kernel since 2.5.43.
Regards, Olaf.
next prev parent reply other threads:[~2003-01-14 22:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-14 19:58 timing an application Maciej Soltysiak
2003-01-14 20:07 ` Chris Friesen
2003-01-14 20:38 ` Corey Minyard
2003-01-14 20:20 ` Richard B. Johnson
2003-01-15 12:21 ` timing an application [results] Maciej Soltysiak
2003-01-14 22:09 ` Olaf Dietsche [this message]
2003-01-14 20:37 timing an application Howell, David P
2003-01-14 21:34 ` David Mosberger
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