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Re: Confusion about nthread and ncore [message #89737 is a reply to message #89731]

Tue, 25 November 2014 09:38

chuxiangning
Messages: 17
Registered: September 2012

Junior Member

Thanks for your suggestion!
I've tested my program under different cases by setting nthreads to different values. (cpu,tpool_nthreads = 3)
I have an i7 cpu, which has 4 cores and 8 threads(2 per cpu).
It turns out the program runs faster when I set nthread to 4 instead of 8 (IDL default). This result is expected anyway.
As a suggestion to IDL, I would suggest they change the default value of nthreads according to number of cores.

nthread time (sec)
1 7.923
2 4.458
3 3.451
4 3.055
6 3.162
8 3.298

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[Message index]

		Confusion about nthread and ncore By: chuxiangning on Thu, 20 November 2014 10:04
		Re: Confusion about nthread and ncore By: Sergey Anfinogentov on Fri, 21 November 2014 03:59
		Re: Confusion about nthread and ncore By: chuxiangning on Tue, 25 November 2014 09:38
		Re: Confusion about nthread and ncore By: victor.cazcarra on Thu, 27 November 2014 01:05
		Re: Confusion about nthread and ncore By: chuxiangning on Sat, 29 November 2014 16:40

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