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Hi - I am not doing anything myself to divide the work. As I understand it,
the CPU ( and I guess in conjunction with the OS to some extent ) uses some
sort of "smart algorithm" to determine the best way to divide up the
workload. When I was running one instance and looking at Task Manager, it
appears that the one instance does not use 100% of one core but rather about
25% of all cores. Then all cores go up by another 25% when additional
instances are started.
Steve
----- Original Message -----
From: "_sdavis" <_sdavis@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, May 22, 2008 9:59 PM
Subject: [amibroker] Re: Quad-core test results
> Hi Steve,
>
> Nice results. How are you dividing the optimization work among the 4
> cores?
>
> Thanks,
> Steve
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Steve Dugas" <sjdugas@xxx> wrote:
>>
>> Hi All,
>>
>> I finished setting up the new quad-core machine and ran my first
> tests today, so am posting the promised test results. All I can say is
> Wow! Really nice improvements, even better than I expected to see in
> my highest hopes. I am happy as a pig in sh*t !! 8 - )
>>
>> For background, the test was an optimization run on a single ticker,
> which is how I will be running all my other tests ( ticker was QID,
> 468 EOD data bars ). All tests used the same code with different param
> settings, all tests had about 46,000 opt steps.
>>
>> To put things in perspective and show why I am so happy, the
> original code was about 2,400 lines. The first time I ran it, on my
> old backup computer which I was using as a dedicated optimization
> machine, it took 7 1/2 hours to run. So then I copied the code and
> created a shorter version, removing everything which wasn't absolutley
> necessary for the optimizer, and that reduced the run time to 2 1/2
> hours. Then I ran this short version on my faster primary machine and
> that took 1 1/4 hours, which is about what I was expecting to see on
> the new machine.
>>
>> So today I started by running just ran one instance on the quad-core
> - that took only 30 mins and Task Manager showed it was using just 25%
> of the total processing power! Well to make a long story short, I
> kept adding one instance at a time, all instances ran in 30 mins and
> each used up an additional 25% of the CPU power. In the end, I was
> easily running 4 simultaneous instances. This pretty much kept the CPU
> tached at 100% but all instances ran fine, all finished in 30 mins and
> I didn't experience any problems at all. I was even saving the first
> ones to spreadsheets while the final ones were still finishing, wow
> everything just worked flawlessly! So, the quad-core can run 4
> seperate opts simultaneously in 30 mins, which averages out to 7 1/2
> minutes per opt, which =
>>
>> 10X improvement over running the short code on the fast machine...
>> 20X improvement over running the short code on the old dedicated
> optimization machine...
>> 60X improvement over running the original code on the old
> optimization machine... Awesome !!!
>>
>> To those who were wondering what is the best machine to get for
> running AB, it looks to me like quad is the way to go. ( My machine
> has an Intel processor, which TJ mentioned should probably work better
> than AMD for this stuff )....
>>
>> Steve
>>
>
>
>
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>
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> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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>
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