From: Chris Friesen <cfriesen@nortelnetworks.com>
To: Maciej Soltysiak <solt@dns.toxicfilms.tv>
Cc: linux-kernel@vger.kernel.org
Subject: Re: timing an application
Date: Tue, 14 Jan 2003 15:07:01 -0500 [thread overview]
Message-ID: <3E246DE5.7080302@nortelnetworks.com> (raw)
In-Reply-To: Pine.LNX.4.51.0301142044400.6432@dns.toxicfilms.tv
Maciej Soltysiak wrote:
> Hi,
>
> 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.
>
> Any ideas on timing a function, or a block of code? Maybe some kernel
> timers or something.
gettimeofday() is accurate. However, your task may be interrupted by
other tasks, interrupts, etc.
Your best bet may be to do many iterations of the routine in question and then
do some statistical analysis of the results.
Chris
--
Chris Friesen | MailStop: 043/33/F10
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next prev parent reply other threads:[~2003-01-14 19:58 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 [this message]
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 ` timing an application Olaf Dietsche
2003-01-14 20:37 Howell, David P
2003-01-14 21:34 ` David Mosberger
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