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Re: [Xen-devel] emulated tsc and frequency info
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] emulated tsc and frequency info |
| From: | Juergen Gross <juergen.gross@xxxxxxxxxxxxxx> |
| Date: | Tue, 20 Jul 2010 13:52:36 +0200 |
| Cc: | Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Tue, 20 Jul 2010 04:53:32 -0700 |
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On 07/20/2010 12:00 PM, Keir Fraser wrote: On 20/07/2010 10:20, "Juergen Gross"<juergen.gross@xxxxxxxxxxxxxx> wrote:with xen 4.0 and xen-unstable I see weird tsc information in my HVM-domain with PV-driver, if xen chooses to emulate tsc (d->arch.vtsc is set): correction: only xen 4.0 is affected! xen-unstable does the scaling correctly. In the shared info page the tsc_to_system_mul is still reflecting the host cpu frequency instead of the emulated 1 GHz. The reason is quite simple: tsc_set_info() is never called with a gtsc_khz value other than 0. I wonder which solution is the correct one: - if tsc_set_info() is called with gtsc_khz=0, assume 1 GHz (my favorite).That sounds best to me. Cc'ing Dan as he may have an opinion. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel -- Juergen Gross Principal Developer Operating Systems TSP ES&S SWE OS6 Telephone: +49 (0) 89 3222 2967 Fujitsu Technology Solutions e-mail: juergen.gross@xxxxxxxxxxxxxx Domagkstr. 28 Internet: ts.fujitsu.com D-80807 Muenchen Company details: ts.fujitsu.com/imprint.html _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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