 Home |
Products |
Support |
Community |
News |
xen-devel
[Xen-devel] [PATCH] FPU LWP 6/8: create lazy and non-lazy FPU restore fu
| To: | "'xen-devel@xxxxxxxxxxxxxxxxxxx'" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir@xxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] FPU LWP 6/8: create lazy and non-lazy FPU restore functions |
| From: | Wei Huang <wei.huang2@xxxxxxx> |
| Date: | Tue, 3 May 2011 15:17:49 -0500 |
| Cc: | |
| Delivery-date: | Tue, 03 May 2011 13:25:49 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| User-agent: | Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10 |
FPU: create lazy and non-lazy FPU restore functionsCurrently Xen relies on #NM (via CR0.TS) to trigger FPU context restore. But not all FPU state is tracked by TS bit. This function creates two FPU restore functions: vcpu_restore_fpu_lazy() and vcpu_restore_fpu_eager(). vcpu_restore_fpu_lazy() is still used when #NM is triggered. vcpu_restore_fpu_eager(), as a comparision, is called for vcpu which is being scheduled in on every context switch. Signed-off-by: Wei Huang <wei.huang2@xxxxxxx>
_______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | [Xen-devel] [PATCH] FPU LWP 5/8: add a mask option to xsave() and xrstor(), Wei Huang |
|---|---|
| Next by Date: | [Xen-devel] [PATCH] FPU LWP 7/8:export LWP related CPUID to AMD SVM guest, Wei Huang |
| Previous by Thread: | [Xen-devel] [PATCH] FPU LWP 5/8: add a mask option to xsave() and xrstor(), Wei Huang |
| Next by Thread: | [Xen-devel] Re: [PATCH] FPU LWP 6/8: create lazy and non-lazy FPU restore functions, Jan Beulich |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
