[Xen-devel] CPU usage for credit2

To:	xen-devel@xxxxxxxxxxxxxxxxxxx
Subject:	[Xen-devel] CPU usage for credit2
From:	Yuehai Xu <yuehaixu@xxxxxxxxx>
Date:	Thu, 23 Sep 2010 09:48:10 -0400
Cc:	George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, xen-tools@xxxxxxxxxxxxxxxxxxx, yhxu@xxxxxxxxx
Delivery-date:	Thu, 23 Sep 2010 06:49:01 -0700
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:cc:content-type; bh=TovrebsFpf2q814hgJYiK4YZ5zEC9gjWKVvFT7QsUF8=; b=wQN0DQJ05Z1cpb4i1RcI80cjsQfVOzA2yCCW3KUUioUyOS44noKvaz8UEICrcu1Nl8 xR6T5IC+TIJj/Le8NDamZNydi2kt9CBweNJZ2ZkZQpxQd4O/AThgYpAed/4Di0PADcnr xKVDNd4z+wbTg3/ho1uG/wRPA8efrRwg+t0L0=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:cc:content-type; b=lG35clBQUu3NLKiRMlMIMgRK1I/Lc754QNqpZYeOTwm1y4CL5AT4kcA2LLAgkyT8Bc JoOvaAYLohwshxaHXQkZIu3shvgPsZpXRxdX+58lE5RfSTd9y6MlOYsfPYznZp1/fVHO 988xlJtVON+03/cIOXaSKUO+avnySNO4Sn0xE=
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

Hi,

Suppose 2 VMs both of which just has a single VCPU share a single
PCPU, if I run CPU intensive program in both of the VMs, the
percentage of CPU usage from xentop is almost 100% for both of the
VMs. I got confusing because since 2 VCPU shares a single PCPU, the
percentage for each one should be around 50%, which is the result if I
change the scheduler from credit2 to credit.

Does it because credit2 change something or is this a bug for xentop or credit2?

Thanks,
Yuehai

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

WARNING - OLD ARCHIVES

xen-tools

[Xen-devel] CPU usage for credit2