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Newsgroups: comp.arch, comp.programming.threads
From: "Chris Thomasson" <cris...@comcast.net>
Date: Sun, 19 Nov 2006 17:05:11 -0800
Local: Sun, Nov 19 2006 8:05 pm
Subject: Re: x86 Sequential Consistency
news:456044a6$0$5710$9b4e6d93@newsspool3.arcor-online.net...
> Chris Thomasson schrieb: Fences are necessary on x86 when your algorithm can't handle the fact that a >> http://groups.google.com/group/comp.programming.threads/msg/b0ab2c440... > Why do you think fences are necessary. When we're synchronizing threads, store followed by a load to another location can, and will, be reordered... For instance, Petersons Algorithm needs to use an mfence in order to prevent the latter load from the other state variable from migrating above the lock acquisition logic: http://groups.google.com/group/comp.programming.threads/browse_frm/th... ;^) You must Sign in before you can post messages.
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