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From: Rusty Russell <rusty@rustcorp.com.au>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jeff Garzik <jgarzik@pobox.com>,
	Linus Torvalds <torvalds@transmeta.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [TRIVIAL] kstrdup
Date: Sun, 20 Apr 2003 18:05:40 +1000	[thread overview]
Message-ID: <20030420081206.C68A62C01A@lists.samba.org> (raw)
In-Reply-To: Your message of "19 Apr 2003 13:27:21 +0100." <1050755240.3277.3.camel@dhcp22.swansea.linux.org.uk>

In message <1050755240.3277.3.camel@dhcp22.swansea.linux.org.uk> you write:
> On Sad, 2003-04-19 at 05:48, Jeff Garzik wrote:
> > And?  It's still slower.
> 
> You are arguing over a 1 instruction, probably sub 1 clock scheduling
> matter on a call which is not used on any fast or common path. If you
> shaved 1 clock off the timer handling instead you'd make a lot more
> difference..

Hey, if we have 50 million machines running 2.6 for three years, this
optimization saves 100 clock cycles per boot (most kstrdups are device
init), and machines boot once a month, and average 1GHz, that's three
minutes of saved time.

I think Jeff and I should start the kstrdup sourceforge project
immediately...

Cheers,
Rusty.
--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.

      parent reply	other threads:[~2003-04-20  8:00 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-04-18  7:58 [TRIVIAL] kstrdup Rusty Trivial Russell
2003-04-18  8:10 ` Jeff Garzik
2003-04-18 16:20   ` Linus Torvalds
2003-04-18 16:56     ` Jeff Garzik
2003-04-18 18:00       ` Linus Torvalds
2003-04-18 18:44         ` Jeff Garzik
2003-04-19  4:52         ` Rusty Russell
2003-04-18 18:00       ` Richard B. Johnson
2003-04-18 18:40         ` Jeff Garzik
2003-04-18 19:24           ` H. Peter Anvin
2003-04-18 23:37             ` Alan Cox
2003-04-18 19:29           ` Richard B. Johnson
2003-04-19 11:45             ` Kai Henningsen
2003-04-19 20:16             ` Ruth Ivimey-Cook
2003-04-19  4:14   ` Rusty Russell
2003-04-19  4:48     ` Jeff Garzik
2003-04-19  8:28       ` Rusty Russell
2003-04-19 12:27       ` Alan Cox
2003-04-19 14:44         ` Bernd Eckenfels
2003-04-20  8:05         ` Rusty Russell [this message]

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