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Re: [Xen-devel] [PATCH] softtsc for PV domains
| To: | Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] softtsc for PV domains |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Thu, 27 Aug 2009 11:28:19 +0100 |
| Cc: | |
| Delivery-date: | Thu, 27 Aug 2009 03:28:48 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] softtsc for PV domains |
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On 26/08/2009 19:00, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote: > Attached patch implements softtsc (TSC emulation) for userland > code in PV domains. It currently is tied to the existing > "softtsc" Xen boot option (which does the same thing but for > HVM domains). Later it should be tied to a > vm.cfg option, but this is sufficient for now to obtain > performance degradation data for PV environments that > heavily utilize rdtsc. To record emulation frequency, > additional output has been added to debug-key "t". Changeset 20128 is a fixed and simplified version of this. Please take a look and test. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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