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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] Re: [PATCH] fxsave/fxrstor adjustments
On 25 Apr 2006, at 01:56, Andi Kleen wrote: On K7/K8 emms and ffree st(7) are the same performance. On P4 ffree is much faster. The Linux 2.6 patch uses emms because it patches the code in only on K7/K8. For the Xen patch that's ok too although it checks, not patches. In Linux 2.4 where the code is executed unconditionally ffree is used. An earlier version of the AMD workaround used emms always until the P4 emms performance issue was discovered. Thanks Andi. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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