WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Problems with xenmon

To: Jia Rao <rickenrao@xxxxxxxxx>
Subject: Re: [Xen-devel] Problems with xenmon
From: Ananth <cbananth@xxxxxxxxx>
Date: Sat, 16 May 2009 07:02:03 +0530
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 15 May 2009 18:33:15 -0700
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type; bh=0CGgpPLaSsQzLYG0DGTgcNtLzPkWNLj/gCUiwvWZ1Ds=; b=meNeFIE6Y6s8lpcVnSibue84SJKU1bK9tpR17qJqG9ov5KCCF62QKO6CHu/VviCcDc SzqjaYSNLcIkW6jibIM7sG/D5bbpNXIJmEMC21YZhK7K8OFamsxJW0UtwA75hEzepXGe /crUOdmO+A4UM2XuiRnqOQxkt5SqMpJgIBsmc=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=PRJS85TzpRCnhNUVbAXO1Wyd0jXJuUfcKwdEhcojzK6u36BrUty0cUUpQLm8VY+P7T 2I+eOrAyC08cWiGAZbEg+c/xNLwLogFl5Ci1A6Ql5KhJ80PlBqDXIt6WHTb8vJIJJkcN 95KILmldvppecMIlAv4NaKqMu3fRvvVyW7Yi8=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <994429490905021408u581a8f1ct72a1429a63386311@xxxxxxxxxxxxxx>
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: <994429490905021408u581a8f1ct72a1429a63386311@xxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Hi,
Even I am facing the same problem. Irrespective of how much I/O I am doing from the guest OS, xenmon iocount shows 0 always. Were you able to figure out why this happens?

Please throw some light on this.

Thank you.

Warm Regards
Ananth

On Sun, May 3, 2009 at 2:38 AM, Jia Rao <rickenrao@xxxxxxxxx> wrote:
Hi all,

I just tried to use xenmon to monitor VMs in a Xen platform.
 
It is strange that the io_count reported by xenmon is always zero for all the domains (including dom0). I ran network intensive as well as disk intensive I/O workloads. Xenmon reports nothing about the I/O event.
 
The page transfer is always zero, but the page map and unmap have values.
Does xen still transfer data from dom0 from/to domu for I/O request? or all the data "transfer" is based on grant table map/unmap?

Best regards,
Jia.
 
FYI:
xen 3.3 (PV)
CentOS Linux 2.6.18-3 for dom0 and domU
Intel Xeon two 4-core

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


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
<Prev in Thread] Current Thread [Next in Thread>