 Home |
Products |
Support |
Community |
News |
xen-devel
Re: [Xen-devel] Poor performance on HVM (kernbench)
| To: | "Daniel Magenheimer" <dan.magenheimer@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Poor performance on HVM (kernbench) |
| From: | "Todd Deshane" <deshantm@xxxxxxxxx> |
| Date: | Wed, 10 Sep 2008 17:42:14 -0400 |
| Cc: | xen-devel mailing list <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Wed, 10 Sep 2008 14:42:37 -0700 |
| Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:reply-to :to:subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=0b1i3jMjdNDiZaJYJCsAOr2O21jc7PV/jkdmq1paZoo=; b=WOG+1rIfWeSqT/xn1R99oV92kpKnwv4DyRHGBrLR1QFqtM+FXLUzvE6ui26M0fYVHu cRU9fHJAH+wydmCCmTCDs6N/2seAl524ZkyFps3D7f+laJJlyzMQbs5NxneqbPS7uFtX zkDB0dgGkrdnhGXF3J1uK7PfkBJp5wad7Z5NY= |
| Domainkey-signature: | a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:reply-to:to:subject:cc:in-reply-to :mime-version:content-type:content-transfer-encoding :content-disposition:references; b=AKJe2jsCaqhGj7t5fw4xetjm1bJyGXRJ2HYye7qetDgTH6QK+DB0HlHdlEcOPeSUgb qs88qC1xJMhAVyhn+bqZrQMOBsqF4in8KGMTKKvKhjcnUPvrAO1l/JjGtLMWTv6BQhAO BVGv05VIqR5GM6lgcnrIN+w4DK+AJt3fR3ph8= |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| In-reply-to: | <e0f1c7f4-7bc5-4d64-8409-464ade1d749f@default> |
| 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> |
| References: | <1e16a9ed0809101123m71a12030v7d06501f6467f93@xxxxxxxxxxxxxx> <e0f1c7f4-7bc5-4d64-8409-464ade1d749f@default> |
| Reply-to: | deshantm@xxxxxxxxx |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
On Wed, Sep 10, 2008 at 5:37 PM, Daniel Magenheimer <dan.magenheimer@xxxxxxxxxx> wrote: > This doesn't answer the HVM question but it appears that > you are running guests with 1 vCPU but comparing against > a dual-CPU native. True? Yes. The intuition is that we don't want to overcommit virtual CPUs since then you are stressing the schedulers more. I ran some tests with 2 vCPUs and all the numbers are a bit higher (as having two CPUs tackling a compile is faster). Although overcommit (of CPUs and memory ;) is interesting, we leave a CPU dedicated to the host system (linux/dom0) on purpose. Todd _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| Previous by Date: | RE: [Xen-devel] Poor performance on HVM (kernbench), Daniel Magenheimer |
|---|---|
| Next by Date: | RE: [Xen-devel] Poor performance on HVM (kernbench), Daniel Magenheimer |
| Previous by Thread: | RE: [Xen-devel] Poor performance on HVM (kernbench), Daniel Magenheimer |
| Next by Thread: | RE: [Xen-devel] Poor performance on HVM (kernbench), Daniel Magenheimer |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
