From: Eugene Surovegin <ebs@ebshome.net>
To: Yang <yangqs@163.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: clock() seems not work !
Date: Sun, 15 Feb 2004 21:14:35 -0800 [thread overview]
Message-ID: <20040216051435.GA25104@gate.ebshome.net> (raw)
In-Reply-To: <200402160354.VAA15020@lists.linuxppc.org>
On Mon, Feb 16, 2004 at 11:58:07AM +0800, Yang wrote:
>
> i am writting applications based ppc+MVL3.0, which i want to get CPU
> time,but clock() seems not work for me, for this i did a simple test,as
> follows:
> /*----------------*/
> while(1)
> {
> printf("current time is %ld \n",clock());
> sleep(1);
> }
> /*----------------*/
> But it printed the same value all the while. How is it?
>
What do you expect from this function?
Did you read manual entry for clock()?
On POSIX systems clock() returns (number of seconds * CLOCKS_PER_SEC)
spent by the process, not a system time/tick count...
Your program is doing _nothing_, so it's normal that clock() returns
the same number. Change sleep(1) to some busy loop and you'll see the
difference.
Eugene.
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next parent reply other threads:[~2004-02-16 5:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200402160354.VAA15020@lists.linuxppc.org>
2004-02-16 5:14 ` Eugene Surovegin [this message]
2004-02-16 7:20 clock() seems not work ! Eugene Surovegin
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