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bgcolor="#FFFFFF" text="#000000"><div style="font-size:
11pt;font-family: Calibri;"><span style="font-family: Calibri;">Hi
Vincent<br><br>I agree with Peter that the best way to get maximum
performance is Bare Metal.<br><br>Have a look at this link when it comes
to virtualization if you have no other options.<br><a class="moz-txt-link-freetext" href="http://dtrace.org/blogs/brendan/2013/01/11/virtualization-performance-zones-kvm-xen/">http://dtrace.org/blogs/brendan/2013/01/11/virtualization-performance-zones-kvm-xen/</a><br><br>I
prefer OpenVZ, but haven't done any stress testing yet.<br>My bet would
be that the performance will be better in Containers/Jails then any
other form of virtualization.<br><br><br></span><div
class="moz-signature">-- <br><span><span style="background-color:
rgba(255, 255, 255, 0);">Rgds</span></span><br>
</div><br><br><blockquote style="border: 0px none;"
cite="mid:CAKQo6t=kuFOY7t4Vx9Eoo3xvEYMQRq--ypZDanDRiYUcgWFBew@mail.gmail.com"
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#EDEEF0;padding-top:5px"> <div
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<a moz-do-not-send="true" href="mailto:gmangudai@gmail.com"
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!important;">Vincent Xia</a></div> <div
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<font color="#9FA2A5"><span style="padding-left:6px">June 20, 2013
7:47 AM</span></font></div></div></div><div
style="color:#888888;margin-left:24px;margin-right:24px;"
__pbrmquotes="true" class="__pbConvBody"><div dir="ltr"><div>my network
card: Intel(R) PRO/1000 MT Network Connection, and all calls have the
media going through FS(everything is in the same LAN), cuz sometimes i
need to do recording, but no with stress testing, as it will make
significant burden to the system.</div>
</div><div class="gmail_extra"><br><br><br></div>
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<font color="#9FA2A5"><span style="padding-left:6px">June 20, 2013
4:31 AM</span></font></div></div></div><div
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__pbrmquotes="true" class="__pbConvBody"><div>Vincent,<br><br>What
network card hardware are you using? UDP packets on cheap<br>networking
cards are very sensitive to a lack of idle cpu time. I've<br>seen many
models of RealTek cards that will start dropping over 10% of<br>all UDP
packets if your CPU idle drops below ~50%. In my experience<br>server
grade Intel network cards are much better, but even these will<br>start
dropping ~5-10% of UDP packets if your CPU idle gets below 15%.<br><br>Also
do these calls have the media going through this box? or through an<br>external
media gateway?<br><br>William King<br>Senior Engineer<br>Quentus
Technologies, INC<br>1037 NE 65th St Suite 273<br>Seattle, WA 98115<br>Main:
(877) 211-9337<br>Office: (206) 388-4772<br>Cell: (253) 686-5518<br><a class="moz-txt-link-abbreviated" href="mailto:william.king@quentustech.com">william.king@quentustech.com</a><br></div><div><!----><br>_________________________________________________________________________<br>Professional
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<font color="#9FA2A5"><span style="padding-left:6px">June 20, 2013
3:55 AM</span></font></div></div></div><div
style="color:#888888;margin-left:24px;margin-right:24px;"
__pbrmquotes="true" class="__pbConvBody"><div dir="ltr">I've doubled CPU
capability, now the CPU usage at 1000 calls is around 50%, but call
loss is still 10-20%, maybe Brian is right, don't try more than 500
calls.</div><div class="gmail_extra"><br><br><br></div>
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<font color="#9FA2A5"><span style="padding-left:6px">June 19, 2013
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<div class="moz-cite-prefix">If your CPU is averaging around 80-90%,
I would consider that maxed out!<br>
Can you try it on a more powerful machine?<br>
</div>
<br>
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<font color="#9FA2A5"><span style="padding-left:6px">June 19, 2013
8:21 AM</span></font></div></div></div><div
style="color:#888888;margin-left:24px;margin-right:24px;"
__pbrmquotes="true" class="__pbConvBody"><div dir="ltr"><div>while i was
doing stress test over FS, things look pretty good as FS is able to
hold 800 concurrent calls with a call loss rate at around 0.1%, when
leveling up to 1000 concurrent calls, the call loss soars to 10-20%, i
made some modification to switch.conf like</div>
<div><br></div><div><param name="max-sessions" value="2000"/></div><div><param
name="sessions-per-second" value="100"/></div><div><br></div><div>but
things didn't get any better, the host CPU usage rate is around 80-90%,
memory usage: 10%, network load 10%, so i think there should be someway
we can make FS handle more concurrent calls, any ideas?</div>
</div>
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