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From: Johannes Stezenbach <js@convergence.de>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>,
	"Kevin D. Kissell" <kevink@mips.com>,
	linux-mips@linux-mips.org
Subject: Re: Once again: test_and_set for CPUs w/o LL/SC
Date: Wed, 16 Oct 2002 18:30:38 +0200	[thread overview]
Message-ID: <20021016163038.GA26585@convergence.de> (raw)
In-Reply-To: <20021016125233.GA25227@convergence.de>

I wrote:

> sysmips is history with current glibc since the Linux kernel emulates
> LL/SC for CPUs that don't have it. This emulation is actually faster than
> sysmips. (You'd think it's slower because it's one syscall vs. two
> emulated instructions. But with LL/SC glibc can use test-and-set
                                                      ^^^^^^^^^^^^
> which enables a more efficient linux-threads mutex implementation.)

Oops, I meant compare-and-swap.


Johannes

  reply	other threads:[~2002-10-16 16:30 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-09-16 16:40 Once again: test_and_set for CPUs w/o LL/SC Johannes Stezenbach
2002-10-07 14:47 ` Johannes Stezenbach
2002-10-07 16:21   ` Kevin D. Kissell
2002-10-07 16:21     ` Kevin D. Kissell
2002-10-07 18:43     ` Johannes Stezenbach
2002-10-07 18:51       ` Daniel Jacobowitz
2002-10-15 17:52         ` Johannes Stezenbach
2002-10-08  7:38       ` Kevin D. Kissell
2002-10-08  7:38         ` Kevin D. Kissell
2002-10-15 15:36       ` Maciej W. Rozycki
2002-10-15 17:21         ` Johannes Stezenbach
2002-10-16 12:20           ` Maciej W. Rozycki
2002-10-16 12:52             ` Johannes Stezenbach
2002-10-16 16:30               ` Johannes Stezenbach [this message]
2002-10-17  9:47                 ` Gleb O. Raiko
2002-10-17 12:02                   ` Maciej W. Rozycki
2002-10-17 13:11                     ` Johannes Stezenbach
2002-10-17 13:32                       ` Gleb O. Raiko
2002-10-17 14:13                         ` Johannes Stezenbach
2002-10-16 18:11         ` Johannes Stezenbach
2002-10-16 18:23           ` Johannes Stezenbach
2002-10-17 11:57           ` Maciej W. Rozycki
2002-10-17 13:25             ` Johannes Stezenbach
2002-10-15 15:17     ` Maciej W. Rozycki
2002-10-15 16:50       ` Johannes Stezenbach

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