<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
That will be the process ID.<br>
<br>
<br>
Regards,<br>
Liang<br>
<br>
<div class="moz-cite-prefix">On 09/09/2014 04:56 PM, Narayanan,
Krishnaprasad wrote:<br>
</div>
<blockquote
cite="mid:529a52d2aed94c0aaec6dc4a1a671ac7@e15be-03.zdv.Uni-Mainz.DE"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]-->
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;
mso-fareast-language:EN-US;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:"Calibri","sans-serif";}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;
mso-fareast-language:EN-US;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal"><span style="color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US">I
used the command ps –AL | grep qemu and I was able to see
the process ID 6850 having 6 thread IDs. In case, if I am
interested to measure the hardware performance counters /
event provided by the CPU registers such as
CPU_CLK_UNHALTED, BRANCH_MISSES and etc…, can I know which
process ID should I be using to get this information?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Krishnaprasad<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="color:windowtext;mso-fareast-language:DE"
lang="EN-US">From:</span></b><span
style="color:windowtext;mso-fareast-language:DE"
lang="EN-US"> lchen [<a class="moz-txt-link-freetext" href="mailto:cl55hhdu@gmail.com">mailto:cl55hhdu@gmail.com</a>]
<br>
<b>Sent:</b> Dienstag, 9. September 2014 20:16<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:openstack@lists.openstack.org">openstack@lists.openstack.org</a><br>
<b>Subject:</b> Re: [Openstack] KVM shows several
processes for a single VM on the host<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;mso-fareast-language:DE"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal">On 09/09/2014 11:08 AM, Narayanan,
Krishnaprasad wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoPlainText">Hi Chris,<o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US">They appear to be
processes when I see it in htop. I have attached the
screenshot of a VM named "instance-000001bf" that has 4
virtual cores. In total, I can see 6 processes for the
above referred VM.</span><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoPlainText"><span style="mso-fareast-language:DE"><img
id="Picture_x0020_1"
src="cid:part1.02010007.09090700@gmail.com" height="142"
width="1732"></span><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US">Can I know is there
a way to differentiate between processes and threads?</span><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US"> </span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";mso-fareast-language:DE"><br>
They ought to be processes according to the htop man page.
But I suspect those are actually the thread IDs - one thread
per each vcpu and another thread executing the main loop
dispatching events. The last one seems to be a temporal work
thread kicked off by the main loop.<br>
The four threads spent similar amount of time running guest
code - the guest work load is spread evenly across all
vcpus.<br>
<br>
You may also run 'ps -AL | grep qemu' to have a look at the
thead Ids and the associated process ID (thread group ID).<br>
<br>
<br>
Liang<br>
<br>
<br>
<o:p></o:p></span></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoPlainText"><span lang="EN-US">Best regards,</span><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US">Krishnaprasad</span><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoPlainText"><span style="mso-fareast-language:DE"
lang="EN-US">-----Original Message-----<br>
From: Chris Friesen [<a moz-do-not-send="true"
href="mailto:chris.friesen@windriver.com">mailto:chris.friesen@windriver.com</a>]
<br>
Sent: Dienstag, 9. September 2014 16:31<br>
To: <a moz-do-not-send="true"
href="mailto:openstack@lists.openstack.org">openstack@lists.openstack.org</a><br>
Subject: Re: [Openstack] KVM shows several processes for a
single VM on the host</span><o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">On 09/09/2014 07:58 AM, Narayanan,
Krishnaprasad wrote:<o:p></o:p></p>
<p class="MsoPlainText">> Hallo all,<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> I have an OpenStack setup based
on Havana with several compute nodes.<o:p></o:p></p>
<p class="MsoPlainText">> When I instantiate a virtual
machine with 1 or more virtual cores, in
<o:p></o:p></p>
<p class="MsoPlainText">> the process list of the compute
node, I am able to see more than 1
<o:p></o:p></p>
<p class="MsoPlainText">> process associated to the same
VM. The process list that I refer is
<o:p></o:p></p>
<p class="MsoPlainText">> the process which can be seen by
running either top or htop.<o:p></o:p></p>
<p class="MsoPlainText">> <o:p></o:p></p>
<p class="MsoPlainText">> Can I know the significance of
other processes which are associated to
<o:p></o:p></p>
<p class="MsoPlainText">> the same VM? Are these child
processes?<o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">Are they separate processes or
separate threads? Separate threads would be expected, but
separate processes would not be.<o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">Chris<o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText"> <o:p></o:p></p>
<p class="MsoPlainText">_______________________________________________<o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US">Mailing list: </span><a
moz-do-not-send="true"
href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack"><span
style="color:windowtext;text-decoration:none"
lang="EN-US">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</span></a><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US">Post to : </span><a
moz-do-not-send="true"
href="mailto:openstack@lists.openstack.org"><span
style="color:windowtext;text-decoration:none"
lang="EN-US">openstack@lists.openstack.org</span></a><o:p></o:p></p>
<p class="MsoPlainText"><span lang="EN-US">Unsubscribe : </span><a
moz-do-not-send="true"
href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack"><span
style="color:windowtext;text-decoration:none"
lang="EN-US">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</span></a><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Times New
Roman","serif";mso-fareast-language:DE"><br>
<br>
<br>
<o:p></o:p></span></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Mailing list: <a moz-do-not-send="true" href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><o:p></o:p></pre>
<pre>Post to : <a moz-do-not-send="true" href="mailto:openstack@lists.openstack.org">openstack@lists.openstack.org</a><o:p></o:p></pre>
<pre>Unsubscribe : <a moz-do-not-send="true" href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><o:p></o:p></pre>
</blockquote>
</div>
</blockquote>
<br>
</body>
</html>