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Hello Steve,<br>
<br>
Have you given any thoughts on what should happen if you chain
multiple +SP commands? i.e.<br>
<br>
erl +S 16:16 +SP 50:50 +SP 50:50<br>
<br>
Our view right now is that this should give [8:8] and not [4:4] as
it currently does in the patch. <br>
<br>
Related to this we also do not think that the order to +S vs +SP
commands should matter. i.e.<br>
<br>
erl +S 16:16 +SP 50:50 +S 16:16<br>
<br>
should give [8:8] and not [16:16].<br>
<br>
What do you think? These things are for sure odd cases to think
about, but if it is possible someone will for sure do it....<br>
<br>
Lukas<br>
<br>
<div class="moz-cite-prefix">On 21/08/13 15:45, Steve Vinoski wrote:<br>
</div>
<blockquote
cite="mid:CAO+zUOU+zeQ2y60Zi+R_cgsS-nULK3O2RhZLgEYLQfES2CM1Zw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>For applications where measurements show enhanced
performance from the use of a non-default number of emulator
scheduler threads, having to accurately set the right number
of scheduler threads across multiple hosts each with
different numbers of logical processors is difficult because
the erl +S option requires absolute numbers of scheduler
threads and scheduler threads online to be specified.</div>
<div><br>
</div>
<div>To address this issue, this patch adds a +SP option to
erl, similar to the existing +S option but allowing the
number of scheduler threads and scheduler threads online to
be set as percentages of logical processors configured and
logical processors available, respectively. For example,
"+SP 50:25" sets the number of scheduler threads to 50% of
the logical processors configured, and the number of
scheduler threads online to 25% of the logical processors
available.</div>
</div>
<div><br>
</div>
<div>
<div><a moz-do-not-send="true"
href="https://github.com/erlang/otp/pull/58">https://github.com/erlang/otp/pull/58</a></div>
<div><br>
</div>
</div>
<div>--steve</div>
</div>
<br>
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<br>
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</blockquote>
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