[GE users] Dynamic multicore requests
Dan.Templeton at Sun.COM
Fri Aug 24 01:06:22 BST 2007
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Have you considered using the $pe_slots setting for the PE and
submitting your jobs with a range of 1 to 8? That way all of the slots
will be assigned to a single machine, and the scheduler will put the job
on the biggest machine it can find. If, however, only a single-core
machine is available, it'll take that as a last resort.
John Coldrick wrote:
> Hi there, currently running 6.0u10 on Linux systems...
> We're recently started acquiring multicore systems(with 8 cores per machine)
> that are being mixed up with older dual-cpu/single core systems. We have an
> application we want to run that is threaded, and the number of threads can be
> specified(from "1" to "max"). Typically many hundreds or thousands of these
> submissions happen at once.
> I'd like to maximize the render power, which to me means(for example) running
> typically one job per system and maxing out the cores/cpus on that one task.
> The trouble I'm running into it that while I can specify pe's or break out
> queues, the approach appears more like a hardwired approach i.e. a given
> submission needs to be *defined* as wanting max cores, or perhaps 1 or 2. If
> I do that, then that job only runs on(say) an 8-core pe. What would be
> perfect is to submit the task, get some sort of feedback about the ececute
> host it's running on("I have 5 slots open!" - an envar?), and then that value
> is fed to the app, telling it to use 5 threads, and those slots are taken and
> reserved by SGE.
> At least that's my personal take on how to do that, but I don't think that's
> possible. :) Any suggestions, documentation-pointing or solutions
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