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List:       xen-users
Subject:    [Xen-users] Problems with xenmon
From:       Jia Rao <rickenrao () gmail ! com>
Date:       2009-04-29 19:45:08
Message-ID: 994429490904291245m2206f0cfie86b935e3ec7882a () mail ! gmail ! com
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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

[Attachment #5 (text/html)]

<style></style><div><font size="2" face="Arial">Hi all,<br><br>I just tried to use \
xenmon to monitor VMs in a Xen  platform.</font></div>
<div><font size="2" face="Arial"></font> </div>
<div><font size="2" face="Arial">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.</font></div>
<div><font size="2" face="Arial"></font> </div>
<div><font size="2" face="Arial">The page transfer is always zero, but the page map 
and unmap have values.</font></div>
<div>Does xen still transfer data from dom0 from/to domu for I/O request? or all the \
data &quot;transfer&quot; is based on grant table map/unmap?<br><br></div> <div><font \
size="2" face="Arial">Best regards,</font></div> <div><font size="2" \
face="Arial">Jia.</font></div> <div><font size="2" face="Arial"></font> </div>
<div><font size="2" face="Arial">FYI:</font></div>
<div><font size="2" face="Arial">xen 3.3 (PV)</font></div>
<div><font size="2" face="Arial">CentOS Linux 2.6.18-3 for dom0 and 
domU</font></div>
<div><font size="2" face="Arial">Intel Xeon two 4-core </font></div>



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