From: Hartvig Ekner <hartvige@mips.com>
To: macro@ds2.pg.gda.pl (Maciej W. Rozycki)
Cc: linux-mips@oss.sgi.com
Subject: Re: PATCH: Fix ll/sc for mips (take 3)
Date: Tue, 5 Feb 2002 20:28:34 +0100 (MET) [thread overview]
Message-ID: <200202051928.UAA21774@copsun18.mips.com> (raw)
In-Reply-To: <Pine.GSO.3.96.1020205134113.9674G-100000@delta.ds2.pg.gda.pl> from "Maciej W. Rozycki" at Feb 05, 2002 02:28:59 PM
Maciej W. Rozycki writes:
> How do you maintain coherency on such a system? To support such a model
> all shared area write accesses should be followed by explicit
> synchronization requests. It should be trivial but tedious to do for
> Linux, but it might not be that easy for threads.
This would have to be a loosely coupled system - something using either
software coherency or uncached accesses for the shared areas. And then
LL/SC for synchronization primitives.
There are a fair number of SOC designs like this, even with more than
two processors.
/Hartvig
WARNING: multiple messages have this Message-ID (diff)
From: Hartvig Ekner <hartvige@mips.com>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: linux-mips@oss.sgi.com
Subject: Re: PATCH: Fix ll/sc for mips (take 3)
Date: Tue, 5 Feb 2002 20:28:34 +0100 (MET) [thread overview]
Message-ID: <200202051928.UAA21774@copsun18.mips.com> (raw)
Message-ID: <20020205192834.izhJKFDWfmtmo-Rp6fguLHqqEFbzDxM0X2514O62iNk@z> (raw)
In-Reply-To: <Pine.GSO.3.96.1020205134113.9674G-100000@delta.ds2.pg.gda.pl> from "Maciej W. Rozycki" at Feb 05, 2002 02:28:59 PM
Maciej W. Rozycki writes:
> How do you maintain coherency on such a system? To support such a model
> all shared area write accesses should be followed by explicit
> synchronization requests. It should be trivial but tedious to do for
> Linux, but it might not be that easy for threads.
This would have to be a loosely coupled system - something using either
software coherency or uncached accesses for the shared areas. And then
LL/SC for synchronization primitives.
There are a fair number of SOC designs like this, even with more than
two processors.
/Hartvig
next prev parent reply other threads:[~2002-02-05 19:28 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-31 20:35 PATCH: Fix ll/sc for mips H . J . Lu
2002-01-31 22:17 ` Maciej W. Rozycki
2002-01-31 22:41 ` H . J . Lu
2002-02-01 3:35 ` Hiroyuki Machida
2002-02-01 4:02 ` [libc-alpha] " Kaz Kylheku
2002-02-01 4:02 ` Kaz Kylheku
2002-02-01 4:59 ` Hiroyuki Machida
2002-02-01 7:00 ` H . J . Lu
2002-02-01 11:12 ` Hiroyuki Machida
2002-02-01 10:49 ` Andreas Schwab
2002-02-01 11:23 ` Geoff Keating
2002-02-01 7:10 ` H . J . Lu
2002-02-01 7:17 ` H . J . Lu
2002-02-01 11:45 ` Maciej W. Rozycki
2002-02-01 18:29 ` PATCH: Fix ll/sc for mips (take 3) H . J . Lu
2002-02-01 23:01 ` Daniel Jacobowitz
2002-02-01 23:15 ` H . J . Lu
2002-02-02 2:37 ` Hiroyuki Machida
2002-02-04 9:32 ` Dominic Sweetman
2002-02-05 6:16 ` Jay Carlson
2002-02-05 8:28 ` Ralf Baechle
2002-02-05 15:10 ` Jay Carlson
2002-02-05 16:06 ` Jay Carlson
2002-02-02 3:26 ` Daniel Jacobowitz
2002-02-02 18:53 ` Justin Carlson
2002-02-02 20:03 ` H . J . Lu
2002-02-02 20:49 ` Hartvig Ekner
2002-02-02 20:49 ` Hartvig Ekner
2002-02-03 5:47 ` Justin Carlson
2002-02-04 19:17 ` Paul Koning
[not found] ` <mailpost.1012680250.7159@news-sj1-1>
2002-02-03 23:29 ` cgd
2002-02-04 6:07 ` Ralf Baechle
2002-02-04 9:46 ` Dominic Sweetman
2002-02-04 16:31 ` H . J . Lu
2002-02-04 16:46 ` Dominic Sweetman
2002-02-05 1:28 ` H . J . Lu
2002-02-05 2:58 ` Daniel Jacobowitz
2002-02-05 4:42 ` H . J . Lu
2002-02-05 4:47 ` Daniel Jacobowitz
2002-02-05 5:30 ` Justin Carlson
2002-02-05 8:39 ` Hartvig Ekner
2002-02-05 8:39 ` Hartvig Ekner
2002-02-05 11:37 ` Maciej W. Rozycki
2002-02-05 12:12 ` Ralf Baechle
2002-02-05 12:31 ` Maciej W. Rozycki
2002-02-05 12:38 ` Hartvig Ekner
2002-02-05 12:38 ` Hartvig Ekner
2002-02-05 13:28 ` Maciej W. Rozycki
2002-02-05 19:28 ` Hartvig Ekner [this message]
2002-02-05 19:28 ` Hartvig Ekner
2002-02-05 18:59 ` Ralf Baechle
2002-02-05 19:30 ` H . J . Lu
2002-02-05 21:54 ` H . J . Lu
2002-02-06 10:32 ` Ralf Baechle
2002-02-06 20:45 ` Why does -g turn off filling the delat slot? H . J . Lu
2002-02-06 21:00 ` PATCH: Modify the mips gas behavior for -g -O H . J . Lu
2002-02-06 21:16 ` Eric Christopher
2002-02-06 21:40 ` Ian Lance Taylor
2002-02-06 21:46 ` Eric Christopher
2002-02-06 22:00 ` PATCH: Define SUBTARGET_ASM_DEBUGGING_SPEC for Linux/mips H . J . Lu
2002-02-07 8:24 ` Eric Christopher
2002-02-06 11:37 ` PATCH: Fix ll/sc for mips (take 3) Maciej W. Rozycki
2002-02-04 17:44 ` cgd
2002-02-04 6:46 ` Ralf Baechle
2002-02-04 7:01 ` PATCH: Fix ll/sc for mips Ralf Baechle
2002-02-04 14:54 ` Maciej W. Rozycki
2002-02-01 11:50 ` Maciej W. Rozycki
2002-02-01 17:40 ` H . J . Lu
2002-02-01 21:41 ` Maciej W. Rozycki
2002-02-01 22:47 ` H . J . Lu
2002-02-02 11:06 ` Maciej W. Rozycki
2002-02-03 2:29 ` Ulrich Drepper
2002-02-03 2:29 ` Ulrich Drepper
2002-01-31 23:33 ` [libc-alpha] " Kaz Kylheku
2002-01-31 23:33 ` Kaz Kylheku
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