From: Andi Kleen <ak@suse.de>
To: Ville Herva <vherva@mail.niksula.cs.hut.fi>
Cc: Ingo Molnar <mingo@elte.hu>, Fabio Riccardi <fabio@chromium.com>,
linux-kernel@vger.kernel.org
Subject: Re: X15 alpha release: as fast as TUX but in user space
Date: Sat, 28 Apr 2001 15:55:24 +0200 [thread overview]
Message-ID: <20010428155524.A30407@gruyere.muc.suse.de> (raw)
In-Reply-To: <20010428161502.I3529@niksula.cs.hut.fi> <Pine.LNX.4.33.0104281521210.10295-100000@localhost.localdomain> <20010428163030.D3682@niksula.cs.hut.fi>
In-Reply-To: <20010428163030.D3682@niksula.cs.hut.fi>; from vherva@niksula.hut.fi on Sat, Apr 28, 2001 at 04:30:30PM +0300
On Sat, Apr 28, 2001 at 04:30:30PM +0300, Ville Herva wrote:
> Yes, that's vaguely resembles what I had in mind. Of course I had no idea
> about the data structures Tux or X15 use internally, so I couldn't think it
> too thoroughly.
You can also just use the cycle counter directly in most modern CPUs. It can
be read with a single instruction.
In fact modern glibc will do it for you when you use
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...)
-Andi
next prev parent reply other threads:[~2001-04-28 13:56 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-28 0:18 Fabio Riccardi
2001-04-28 0:41 ` Aaron Lehmann
2001-04-28 0:49 ` David S. Miller
2001-04-28 1:11 ` Fabio Riccardi
2001-04-28 8:42 ` Ingo Molnar
2001-04-28 13:15 ` Ville Herva
2001-04-28 13:21 ` Ingo Molnar
2001-04-28 13:24 ` Ingo Molnar
2001-04-28 13:30 ` Ville Herva
2001-04-28 13:55 ` Andi Kleen [this message]
2001-04-29 21:25 ` Fabio Riccardi
2001-04-30 5:43 ` dean gaudet
2001-04-30 19:36 ` Fabio Riccardi
2001-04-30 21:47 ` dean gaudet
2001-04-30 21:52 ` David S. Miller
2001-05-01 7:31 ` Ingo Molnar
2001-04-30 6:39 ` David S. Miller
2001-05-01 7:25 ` Ingo Molnar
2001-04-28 7:32 Ingo Molnar
2001-04-29 21:19 ` Fabio Riccardi
2001-05-01 8:53 ` Ingo Molnar
2001-05-01 17:10 ` Fabio Riccardi
2001-05-01 17:12 ` Ingo Molnar
2001-05-04 1:58 ` Fabio Riccardi
2001-05-04 8:49 ` Ingo Molnar
2001-05-04 18:10 ` Fabio Riccardi
2001-05-04 18:38 ` Davide Libenzi
2001-05-09 22:42 ` Fabio Riccardi
2001-05-02 8:50 ` Ingo Molnar
2001-05-02 14:12 ` Zach Brown
2001-05-03 2:41 ` Fabio Riccardi
2001-05-02 23:19 ` Lincoln Dale
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