From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fasiha Ashraf <feehapk@yahoo.co.in>
Subject: Re: Re: [Xen-users] About profiling xen
Date: Mon, 5 Oct 2009 17:08:54 +0530 (IST)
Message-ID: <197376.79799.qm@web94607.mail.in2.yahoo.com>
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To: Jeremy Fitzhardinge <jeremy@goop.org>, Marco Tizzoni <marco.tizzoni@gmail.com>
Cc: "Fajar A." <fajar@fajar.net>, xen <xen-devel@lists.xensource.com>, xen-users@lists.xensource.com
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Is this the issue that is affecting guest to guest throughput? Since I have=
 timer frequency 1000Hz and high resolution timer both enabled in my dom0. =
Also i am using cup cores pinned for each VM an Dom0. Please guide me some =
more about getting increased throughput between guests.=20
Could it be an ebtable filter issue?
Regards,
Fasiha Ashraf

--- On Fri, 2/10/09, Marco Tizzoni <marco.tizzoni@gmail.com> wrote:

From: Marco Tizzoni <marco.tizzoni@gmail.com>
Subject: Re: [Xen-devel] Re: [Xen-users] About profiling xen
To: "Jeremy Fitzhardinge" <jeremy@goop.org>
Cc: "Fajar A." <fajar@fajar.net>, "Fasiha Ashraf" <feehapk@yahoo.co.in>, "x=
en" <xen-devel@lists.xensource.com>, xen-users@lists.xensource.com
Date: Friday, 2 October, 2009, 3:20 AM

On Fri, Oct 2, 2009 at 12:01 AM, Jeremy Fitzhardinge <jeremy@goop.org> wrot=
e:
> On 10/01/09 14:55, Marco Tizzoni wrote:
>> Sorry, I was not clear. It works as I expect, i.e going not over 1000
>> hz (my dom0 kernel has been compiled with 1000hz).
>>
>
> OK, that's definitely *not* expected. =A0If you're running with
> CONFIG_NO_HZ and HIGH_RES_TIMERS then timer resolution should have
> nothing to do with your HZ configuration.

> 100kHz is also very demanding.
> How does it work with 2kHz? 10kHz?

hal9k-dom0 ~ # ./testtimer .0001 |head -n10
1000 iterations at=A0 0.000100 sec
0.000051
0.000885
0.000890
0.000892
0.000891
0.000892
0.000893
0.000893
0.000879
0.000893
hal9k-dom0 ~ # ./testtimer .002 |head -n10
1000 iterations at=A0 0.002000 sec
0.000744
0.000978
0.000990
0.000990
0.000990
0.000991
0.000992
0.000991
0.000992
0.000990


m-
=0A=0A=0A      From cricket scores to your friends. Try the Yahoo! India Ho=
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<table cellspacing=3D"0" cellpadding=3D"0" border=3D"0" ><tr><td valign=3D"=
top" style=3D"font: inherit;">Is this the issue that is affecting guest to =
guest throughput? Since I have timer frequency 1000Hz and high resolution t=
imer both enabled in my dom0. Also i am using cup cores pinned for each VM =
an Dom0. Please guide me some more about getting increased throughput betwe=
en guests. <br>Could it be an ebtable filter issue?<br>Regards,<br>Fasiha A=
shraf<br><br>--- On <b>Fri, 2/10/09, Marco Tizzoni <i>&lt;marco.tizzoni@gma=
il.com&gt;</i></b> wrote:<br><blockquote style=3D"border-left: 2px solid rg=
b(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Marco Tizzo=
ni &lt;marco.tizzoni@gmail.com&gt;<br>Subject: Re: [Xen-devel] Re: [Xen-use=
rs] About profiling xen<br>To: "Jeremy Fitzhardinge" &lt;jeremy@goop.org&gt=
;<br>Cc: "Fajar A." &lt;fajar@fajar.net&gt;, "Fasiha Ashraf" &lt;feehapk@ya=
hoo.co.in&gt;, "xen" &lt;xen-devel@lists.xensource.com&gt;,
 xen-users@lists.xensource.com<br>Date: Friday, 2 October, 2009, 3:20 AM<br=
><br><div class=3D"plainMail">On Fri, Oct 2, 2009 at 12:01 AM, Jeremy Fitzh=
ardinge &lt;<a ymailto=3D"mailto:jeremy@goop.org" href=3D"/mc/compose?to=3D=
jeremy@goop.org">jeremy@goop.org</a>&gt; wrote:<br>&gt; On 10/01/09 14:55, =
Marco Tizzoni wrote:<br>&gt;&gt; Sorry, I was not clear. It works as I expe=
ct, i.e going not over 1000<br>&gt;&gt; hz (my dom0 kernel has been compile=
d with 1000hz).<br>&gt;&gt;<br>&gt;<br>&gt; OK, that's definitely *not* exp=
ected. &nbsp;If you're running with<br>&gt; CONFIG_NO_HZ and HIGH_RES_TIMER=
S then timer resolution should have<br>&gt; nothing to do with your HZ conf=
iguration.<br><br>&gt; 100kHz is also very demanding.<br>&gt; How does it w=
ork with 2kHz? 10kHz?<br><br>hal9k-dom0 ~ # ./testtimer .0001 |head -n10<br=
>1000 iterations at&nbsp; 0.000100
 sec<br>0.000051<br>0.000885<br>0.000890<br>0.000892<br>0.000891<br>0.00089=
2<br>0.000893<br>0.000893<br>0.000879<br>0.000893<br>hal9k-dom0 ~ # ./testt=
imer .002 |head -n10<br>1000 iterations at&nbsp; 0.002000 sec<br>0.000744<b=
r>0.000978<br>0.000990<br>0.000990<br>0.000990<br>0.000991<br>0.000992<br>0=
.000991<br>0.000992<br>0.000990<br><br><br>m-<br></div></blockquote></td></=
tr></table><br>=0A      <!--7--><hr size=3D1></hr> Yahoo! India has a new l=
ook. <a href=3D"http://in.rd.yahoo.com/tagline_metro_2/*http://in.yahoo.com=
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