Hi,
I assume your Mac Pro is equipped with an i5-4278U? "U" processor based
Mac computers are designed to save energy "to the max". The GPU of the
i5-2467M processor of my Mac Air hardly leaves the 350 MHz level and at
that level it runs without apparent problems (no obvious bottlenecks,
all is smooth). If I increase the radius of an ED-map I can force the
GPU to leave the 350 MHz level but with clearly lowered responsiveness
due to having no dedicated gDDR5 memory, no eDRAM memory, and a narrow
64-bit bus width.....
My guess, you probably trespassed a certain amount of GPU computing
power that requires the GPU to speed up (in your case running at merely
200 MHz base frequency) and by doing so, the GPU runs into apparent
system limits/bottlenecks. The IRIS 5100 (and hardware implementation by
Apple) cannot really substitute for a true OpenGL graphics card in the
end and further more only "supports" OpenGL (not equal to a full OpenGL
hardware implementation).
To get some ideas about the GPU load, install the Intel Power Gadget on
your Mac and compare/see what happens if you run coot with a model that
worked in the past and the current model with 16 chains.....
Cheers,
Jeroen
Am 31.01.17 um 00:02 schrieb Jan Abendroth:
Hi all,
I am refining a protein with 16 copies of the same chain per ASU.
Fortunately, it is a small protein.
Coot has become really slow for this structure. Any real space
refinement or placement of a water makes coot for 10+ seconds
unresponsive. The coot backup files aren't that large, around 700k.
Not displaying NCS and using a small radius for crystallographic
symmetry does not help.
I am using a MacBook Pro 2.6GHz i5, 8GB RAM, Intel IRIS 1534 MB, flash
hard drive. I has never been that slow for 50+ structures.
Does anyone have a good idea?
Thanks!
Jan
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