From: Keir Fraser <keir.fraser@eu.citrix.com>
To: "Mr. Teo En Ming (Zhang Enming)" <space.time.universe@gmail.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Valtteri Kiviniemi <valtteri.kiviniemi@dataproof.fi>
Subject: Re: Latest unstable detects cpu speed incorrectly
Date: Tue, 27 Oct 2009 17:23:08 +0000 [thread overview]
Message-ID: <C70CDCFC.1893B%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <f712b9cf0910271020n61180c4fu6a7a9fee7432f9a3@mail.gmail.com>
On 27/10/2009 17:20, "Mr. Teo En Ming (Zhang Enming)"
<space.time.universe@gmail.com> wrote:
> What does it mean by reverting to old behavior?
>
> Does setting tsc_native=1 in HVM config increases the performance of domU?
Yes, since it means RDTSC instruction is directly executed in the guest,
rather than being trapped and emulated. Degree of improvement will depend on
the guest and workload.
-- Keir
next prev parent reply other threads:[~2009-10-27 17:23 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-27 15:22 Latest unstable detects cpu speed incorrectly Valtteri Kiviniemi
2009-10-27 15:27 ` Pasi Kärkkäinen
2009-10-27 15:28 ` Keir Fraser
2009-10-27 15:48 ` Valtteri Kiviniemi
2009-10-27 15:51 ` Valtteri Kiviniemi
2009-10-27 16:05 ` Keir Fraser
2009-10-27 16:12 ` Valtteri Kiviniemi
2009-10-27 16:14 ` Valtteri Kiviniemi
2009-10-27 16:15 ` Valtteri Kiviniemi
2009-10-27 16:27 ` Keir Fraser
2009-10-27 16:32 ` Valtteri Kiviniemi
2009-10-27 16:34 ` Valtteri Kiviniemi
2009-10-27 16:36 ` Valtteri Kiviniemi
2009-10-27 19:46 ` Jeremy Fitzhardinge
2009-10-27 19:48 ` Jeremy Fitzhardinge
2009-10-27 21:39 ` Valtteri Kiviniemi
2009-10-27 21:40 ` Valtteri Kiviniemi
2009-10-27 16:47 ` Keir Fraser
2009-10-27 17:20 ` Mr. Teo En Ming (Zhang Enming)
2009-10-27 17:23 ` Keir Fraser [this message]
2009-10-27 17:25 ` Mr. Teo En Ming (Zhang Enming)
[not found] ` <C70CDFC0.18949%keir.fraser@eu.citrix.com>
2009-10-27 18:22 ` Mr. Teo En Ming (Zhang Enming)
2009-10-27 18:40 ` Keir Fraser
2009-10-27 18:47 ` Mr. Teo En Ming (Zhang Enming)
2009-10-27 18:56 ` Keir Fraser
2009-10-27 18:59 ` Mr. Teo En Ming (Zhang Enming)
2009-10-27 16:18 ` Mr. Teo En Ming (Zhang Enming)
2009-10-27 16:26 ` Mr. Teo En Ming (Zhang Enming)
2009-10-27 19:41 ` Jeremy Fitzhardinge
2009-10-27 16:02 ` Keir Fraser
2009-10-27 22:15 ` Dan Magenheimer
2009-10-27 22:31 ` Jeremy Fitzhardinge
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