From: Jun Sun <jsun@mvista.com>
To: Florian Lohoff <flo@rfc822.org>
Cc: Joe deBlaquiere <jadb@redhat.com>,
"Maciej W. Rozycki" <macro@ds2.pg.gda.pl>,
ralf@oss.sgi.com, Pete Popov <ppopov@mvista.com>,
George Gensure <werkt@csh.rit.edu>,
linux-mips@oss.sgi.com
Subject: Re: MIPS_ATOMIC_SET again (Re: newest kernel
Date: Wed, 23 May 2001 14:06:07 -0700 [thread overview]
Message-ID: <3B0C263F.B4BD9259@mvista.com> (raw)
In-Reply-To: 20010523205412.A10981@paradigm.rfc822.org
Florian Lohoff wrote:
> My favourit would be to let the glibc on runtime decide whether
> to use sysmips or ll/sc in the atomic test_and_set stuff. This would
> lead to an common atom op in the userspace which is fast on ll/sc
> cpus and gives much lesser performance penaltys in the sysmips case
> than emulating ll/sc.
>
Do you have an idea how this run-time detection might be implemented? I am
very curious.
For example, how will you figure out the existence of ll/sc instruction? Is
that a test which is a part of every process startup procedure? Or do you
introduce a new syscall?
Jun
next prev parent reply other threads:[~2001-05-23 21:07 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-21 22:45 newest kernel George Gensure
2001-05-21 23:10 ` Pete Popov
2001-05-21 23:23 ` Jun Sun
2001-05-21 23:25 ` Pete Popov
2001-05-22 12:33 ` Florian Lohoff
2001-05-22 17:04 ` George Gensure
2001-05-22 17:04 ` George Gensure
2001-05-22 22:46 ` MIPS_ATOMIC_SET again (Re: " Jun Sun
2001-05-23 6:37 ` Joe deBlaquiere
2001-05-23 13:34 ` Maciej W. Rozycki
2001-05-23 17:48 ` Joe deBlaquiere
2001-05-23 18:20 ` Kevin D. Kissell
2001-05-23 18:20 ` Kevin D. Kissell
2001-05-23 19:37 ` Maciej W. Rozycki
2001-05-23 23:49 ` Kevin D. Kissell
2001-05-23 23:49 ` Kevin D. Kissell
2001-05-24 4:11 ` Joe deBlaquiere
2001-05-24 10:56 ` Maciej W. Rozycki
2001-05-24 10:44 ` Maciej W. Rozycki
2001-05-24 15:15 ` Kevin D. Kissell
2001-05-24 15:15 ` Kevin D. Kissell
2001-05-24 16:21 ` Maciej W. Rozycki
2001-05-24 22:46 ` Joe deBlaquiere
2001-05-25 17:19 ` Maciej W. Rozycki
2001-05-25 22:02 ` Surprise! (Re: " Jun Sun
2001-05-25 23:56 ` Jun Sun
2001-05-28 15:34 ` Maciej W. Rozycki
2001-05-29 22:32 ` Jun Sun
2001-05-30 6:46 ` Kevin D. Kissell
2001-05-30 6:46 ` Kevin D. Kissell
2001-05-30 13:42 ` Maciej W. Rozycki
2001-05-30 17:39 ` Jun Sun
2001-05-31 8:37 ` Maciej W. Rozycki
2001-05-31 11:54 ` Ralf Baechle
2001-05-31 19:16 ` Jun Sun
2001-05-23 18:41 ` Jun Sun
2001-05-23 18:54 ` Florian Lohoff
2001-05-23 18:55 ` Florian Lohoff
2001-05-23 20:04 ` Joe deBlaquiere
2001-05-24 9:32 ` Maciej W. Rozycki
2001-05-26 13:14 ` Florian Lohoff
2001-05-28 15:37 ` Maciej W. Rozycki
2001-05-26 13:15 ` Florian Lohoff
2001-05-28 15:43 ` Maciej W. Rozycki
2001-05-28 16:25 ` Kevin D. Kissell
2001-05-28 16:25 ` Kevin D. Kissell
2001-05-28 17:10 ` Maciej W. Rozycki
2001-05-29 6:57 ` Geert Uytterhoeven
2001-05-29 10:45 ` Maciej W. Rozycki
2001-05-29 13:02 ` Joe deBlaquiere
2001-05-29 15:45 ` Mike McDonald
2001-05-30 1:32 ` Mike McDonald
2001-05-30 7:09 ` Kevin D. Kissell
2001-05-30 7:09 ` Kevin D. Kissell
2001-05-30 14:48 ` J. Scott Kasten
2001-05-30 14:48 ` J. Scott Kasten
2001-05-29 22:37 ` Jun Sun
2001-05-30 12:01 ` Maciej W. Rozycki
2001-05-30 17:54 ` Jun Sun
2001-05-31 7:39 ` Maciej W. Rozycki
2001-05-23 19:44 ` Maciej W. Rozycki
2001-05-24 4:25 ` Keith M Wesolowski
2001-05-23 21:06 ` Jun Sun [this message]
2001-05-23 19:29 ` Maciej W. Rozycki
2001-05-23 17:10 ` Jun Sun
2001-05-23 13:18 ` Maciej W. Rozycki
2001-05-23 17:38 ` Jun Sun
2001-05-23 18:47 ` Maciej W. Rozycki
2001-05-23 20:58 ` Jun Sun
2001-05-23 13:45 ` wrt irc joshua
2001-05-23 15:19 ` porting from headers Keith M Wesolowski
2001-05-23 15:55 ` wrt irc nick
2001-05-23 15:57 ` Keith M Wesolowski
2001-05-23 16:03 ` nick
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