Re: [PyMOL] multi cpu rendering

[Serge C. <ser...@us...>]

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Hi there;

Indeed if you read the documentation of Python, you'll see that the=20
python byte-code interpreter is not able to run multiple thread at any=20=

given time... So know what I'm not sure is if the ray tracing code of=20
pymol is in python or another language (C, C++???). If the ray tracing=20=

code is in Python, you will never be able to see a single pymol process=20=

using running on more than a single processor (at a given time).

SergE.

Le 19 avr. 05, =E0 15:57, EPF (Esben Peter Friis) a =E9crit :

> Hi Neil
> =A0
> Have you tried the command
> =A0
> set max_threads, 4
> =A0
> That should enforce 4 threads, even on single CPU machines. Then it's=20=

> up to the kernel scheduler to distribute them to the defferent CPUs
> =A0
> =A0
> Cheers,
> =A0
> Esben
> =A0
> =A0
> =A0
>> -----Original Message-----
>> From: pym...@li...=20
>> [mailto:pym...@li...] On Behalf Of Neil=20
>> Ranson
>> Sent: 19. april 2005 13:34
>> To: PyM...@li...
>> Subject: [PyMOL] multi cpu rendering
>>
>> =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0
>> Dear All,
>> I=92ve been preparing figures for a manuscript on a Sun v40z with 4 x=20=

>> Opteron 850 cpu=92s and 8Gb of memory (and Suse9.0). When I start=20
>> pymol:
>> =A0
>> > pymol.com =96c script.pml
>> =A0
>> pymol says that it detects 4cpu and enables multithreaded rendering,=20=

>> but I never see it using more than one cpu.
>> Especially for producing ray traced movies, I=92d really like to see=20=

>> the multiprocessing benefits.
>> =A0
>> Does anyone have any suggestions?
>> =A0
>> Cheers,
>> =A0
>> Neil
>> =A0
>> =A0
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Serge Cohen

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