<div dir="ltr">Dear Gerald,<div><br></div><div>I finally got to the bottom of this. Some of the functions my "ChordalSeparate" function was calling returned SCIP_RETCODE and were wrapped inside a SCIP_CALL. These functions did not appear</div><div>in the output from the profile. I altered them to be 'normal' functions and called them without the SCIP_CALL wrapping. After doing this they appeared as expected in the profile output and my constraint handler's</div><div>lock method ( consLockChordal ) only showed up as being called twice. So everything now makes sense.</div><div><br></div><div>One thing perhaps noting, my original approach - where the functions were wrapped inside a SCIP_CALL - was a bit silly: there was no point doing this wrapping and the SCIP* pointer I sent to the functions</div><div>was not even used in them. (An earlier version had done some SCIPallocMemoryArray calls but I then removed these.) Perhaps this weird code somehow confused the profiling.</div><div><br></div><div>James</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 1 March 2016 at 22:52, Gerald Gamrath <span dir="ltr"><<a href="mailto:gamrath@zib.de" target="_blank">gamrath@zib.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Dear James,<br>
<br>
this looks unexpected. Your separator adds constraints of your
constraints handler and no rows? Then, the CONSLOCK callback of your
constraint handler is called whenever a constraint is added to
update the rounding locks of variables in the constraint. Could
there be a performance issue in that CALLBACK implementation?<br>
<br>
Best,<br>
Gerald<br>
<br>
<div>Am 28.02.2016 um 17:14 schrieb James
Cussens:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I have implemented a separator for a constraint
handler I have written. When profiling I find that most of the
time is spent when my separator calls my constraint hander's
lock method:
<div><br>
</div>
<div>
<div> 2
SCIPconsAddLocks <cycle 2> [2184]</div>
<div> 257328483
ChordalSeparate <cycle 2> [19]</div>
<div>[3] 49.2 27.00 0.64 257328485
consLockChordal <cycle 2> [3]</div>
<div> 0.35 0.00 110035069/224944534
BMSreallocMemoryArray_call [45]</div>
<div> 0.29 0.00 147293414/176070304
BMSallocMemoryArray_call [61]</div>
<div> 0.00 0.00 1332/12022817
readNextLine [147]</div>
<div> 0.00 0.00 1332/262849 get_edge
[2084]</div>
<div> 498
SCIPaddVarLocks <cycle 2> [2102]</div>
<div><br>
</div>
<div>I'm not sure why this is happening. Can anyone enlighten
me?</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>James</div>
<div><br>
</div>
-- <br>
<div>James Cussens<br>
Dept of Computer Science &<br>
York Centre for Complex Systems Analysis<br>
Room 326, The Hub, Deramore Lane Tel +44
(0)1904 325371<br>
University of York
Fax <a href="tel:%2B44%20%280%291904%20500159" value="+441904500159" target="_blank">+44 (0)1904 500159</a><br>
York YO10 5GE, UK <a href="http://www.cs.york.ac.uk/%7Ejc" target="_blank"></a><a href="http://www.cs.york.ac.uk/~jc" target="_blank">http://www.cs.york.ac.uk/~jc</a><br>
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</div>
<br>
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</blockquote>
<br>
</div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">James Cussens<br>Dept of Computer Science &<br>York Centre for Complex Systems Analysis<br>Room 326, The Hub, Deramore Lane Tel +44 (0)1904 325371<br>University of York Fax +44 (0)1904 500159<br>York YO10 5GE, UK <a href="http://www.cs.york.ac.uk/~jc" target="_blank">http://www.cs.york.ac.uk/~jc</a><br><a href="http://www.york.ac.uk/docs/disclaimer/email.htm" target="_blank">http://www.york.ac.uk/docs/disclaimer/email.htm</a></div>
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