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Re^3: How much computational speed boost occurs for CALL64 and multi processors??

Alex Granovsky
gran@classic.chem.msu.su


Dear Siddheshwar,

See

http://classic.chem.msu.su/cgi-bin/ceilidh.exe/gran/gamess/forum/?C34df668afbHW-7361-1269-00.htm


Kind regards,
Alex Granovsky

On Sat Apr 12 '14 6:57am, Siddheshwar Chopra wrote
--------------------------------------------------
>Dear Alex,
>How do I check for core parking feature in Win 7? Yes I am running two programs, one in dual core and another in i3. Core i3 I am using 4 cores. On dual core, Win xp and on i3 Win 7 is installed.

>Regards,

>On Fri Apr 11 '14 4:40pm, Alex Granovsky wrote
>----------------------------------------------
>>Hello,

>>normally, Firefly scales almost linearly with respect to the number
>>of cores used in computations.

>>As to your dual-core and Core i3 systems, are you running Firefly
>>in parallel on both of them? How much cores are you using on
>>Core i3 system? What is the OS installed on your systems.
>>If you are using Windows 7, is the core parking feature disabled?

>>Kind regards,
>>Alex Granovsky
>>
>>
>>On Sun Mar 30 '14 10:51pm, Siddheshwar Chopra wrote
>>---------------------------------------------------
>>>Dear Sir,
>>>It has become all the more important to understand how more number of processors, 64 bit OS effect the Firefly computational speed, say for Hessian and TDDFT etc. calculations?
>>>I have a dual core system with 2 threads and a i3 one with 2 cores and 4 threads.. But dual core one seems to work faster with all same commands used like p2p, httfix etc. How do we decide upon choosing  the no. of processors to be used??

>>>Regards,
>>>


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