<html><head></head><body bgcolor="#FFFFFF" text="#000000" style="background-color: rgb(255, 255, 255); line-height: initial;"> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Bogdan,</div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">For moderately I/O-bound processing, what is the optimal number of child processes in relation to CPU cores?</div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial;">You say that the number of child processes can exceed available cores (i.e. nproc). By how much? Where is the point at which contention, locking and waiting leads to diminishing returns?</span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial;">My personal experience suggests that on an 8-core system, architectural diminishing returns of this sort appear quite rapidly, and that 32 would be far too many worker processes. However, last time I really experimented was some years ago.</span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial;"><br></span></div><div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><span style="font-size: initial; line-height: initial; text-align: initial;">-- Alex</span></div> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br style="display:initial"></div> <div style="display:none"></div> <div style="font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">--<br>Alex Balashov | Principal | Evariste Systems LLC<br>303 Perimeter Center North, Suite 300<br>Atlanta, GA 30346<br>United States<br><br>Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)<br>Web: http://www.evaristesys.com/, http://www.csrpswitch.com/<br><br>Sent from my BlackBerry.</div> <table width="100%" style="background-color:white;border-spacing:0px;"> <tbody><tr><td colspan="2" style="font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"> <div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in; font-family: Tahoma, 'BB Alpha Sans', 'Slate Pro'; font-size: 10pt;"> <div><b>From: </b>Bogdan-Andrei Iancu</div><div><b>Sent: </b>Friday, February 5, 2016 05:45</div><div><b>To: </b>OpenSIPS users mailling list; Søren Andersen</div><div><b>Reply To: </b>OpenSIPS users mailling list</div><div><b>Subject: </b>Re: [OpenSIPS-Users] recommended settings for performance</div></div></td></tr></tbody></table><div style="border-style: solid none none; border-top-color: rgb(186, 188, 209); border-top-width: 1pt; font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"></div><br><div id="_originalContent" style="background-color: rgb(255, 255, 255);">
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<tt>Hi </tt>Søren,<br>
<br>
The throughput of your opensips highly depends on your script - if
your logic is complex, if it performs many external queries
(db,radius, rest, etc). It is more test and see approach - monitor
the load of your opensips and adjusted based on your observations .<br>
<br>
Trying to answer to your questions:<br>
<br>
1) assuming there is a need for CPU processing, you should configure
a number of total processes (in opensips) at least equal to the
number of cores - the opensips as overall app can use all the cores
in the same time.<br>
<br>
2) I guess you mean about memory ? if you have large CPS / parallel
calls / registrations, consider increasing the shm memory - anyhow,
inspect the mem usage at runtime with "opensipsctl fifo
get_statistics shmem: " and re-adjust<br>
<br>
3) if you script is I/O intensive (DNS, DB, RADIUS, REST), better
have a large number of processes (32?). If not, try to correlated
with the number of cores you have. Also, adjust on the run by
checking the internal load via "opensipsctl fifo get_statistics
load: "<br>
<br>
Regards, <br>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 01.02.2016 23:31, Søren Andersen
wrote:<br>
</div>
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<p class="MsoNormal">Hello there,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I’m looking for some
reference configs on opensips performance.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-US">How
many cpu cores are you using and how many CPS are you
peaking at?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-US">Which
startoptions in opensipsctlrc are you using?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span lang="EN-US"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><!--[endif]--><span lang="EN-US">How
many opensips process children are you running?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Currently I’m planning
to use STARTOPTIONS="-m 2048 -M 8" on a 2 core VM with
children=8. – I hope I’ll be able to run 600-1500 currently
call on that setup. But that are your experience?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">/Søren</span><span style="mso-fareast-language:DA" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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