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Re: How to hobble a CPU

by VSarkiss (Monsignor)
on Jun 07, 2006 at 15:35 UTC ( #554057=note: print w/replies, xml ) Need Help??

in reply to How to hobble a CPU

If you're trying to do an overall performance test, CPU speed (or "power") is only one factor. If your task is I/O bound it may even be a negligible factor.

In general, trying to scale performance numbers is difficult. You may want to try running some baseline tests a few times on each platform to see if the results are comparable. If so, you could then proceed with testing on your machine and scaling the results up or down. It's not perfect, but it's probably reasonable.

You can use Perl tools like for conducting the tests, but the problem itself is much broader.

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Re^2: How to hobble a CPU
by Solostian (Beadle) on Jun 07, 2006 at 15:46 UTC
    The test is a mix of both raw CPU power and I/O.
    The workstation is receiving a lot of records (5000+) thru the LAN and needs to add them to a cockpit. The cockpit is refreshed after each received record.
    The deployed workstations are about 50% less powerful (CPU, RAM) than my workstation and they can't refresh the cockpit quickly enough while mine can.


    -- "Fortunately, ridicule does not kill..."

      /me cringes at this idea.

      I'm assuming you have a reason for refreshing constantly...but is it a realy realy good reason? I mean wouldn't refreshing after batches work better for both stations with probably limited impact on the actual use? It is hard to tell, but realy if you want the performance of your target machine then test it on your target machine, thats the only way you are going to know how well it will run on the target machine.

      Best of luck

      Eric Hodges

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[1nickt]: ...modern car. Suggests using TLA+ or other software modeling language to autogenerate code.
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