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Re: why is octave 4.2.0 x86_64-w64-mingw32 so slow?


From: Ray Tayek
Subject: Re: why is octave 4.2.0 x86_64-w64-mingw32 so slow?
Date: Mon, 23 Oct 2017 18:39:59 -0700
User-agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 10/23/2017 6:23 PM, Doug Stewart wrote:


On Mon, Oct 23, 2017 at 9:11 PM, Ray Tayek <address@hidden i did a profile ...

    i would think that one of the cores/threads would be saturated. ...


I think that you don't understand how the os handles the cores and the load.
With a single thread program running full out the os usually farms the load out between all the cores. thus 1 core at 100% when it is shared will show up as 4 cores at 25%. I think this is what you are seeing.

maybe. the cpu utilization shows 10%-20% across all cores most of the time. so it could be spread out. otoh, there are still dozens of windoze services that are running, so it's hard to tell.

one of the other people taking the course reported that Octave 4.0.3 runs much faster.

i did pass the quiz, so this is not urgent. i am just curious why none of the cpu's saturate.

thanks


--
Honesty is a very expensive gift. So, don't expect it from cheap people - Warren Buffett´╗┐
http://tayek.com/



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