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PowerPC Linux?

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Simon:
My recommendation for you - grab "live" WUs off any of your hosts, with a spread of ARs reflecting the most common ones.

There's a set of WUs we use to benchmark here, most of them were also grabbed off BOINC. The only modification I made was to reduce two parameters inside the WU files - they have an XML header, if you open them up in a text editor, you'll see.

There are two occurrences of the same setting, both need to be changed (only a few lines apart) - "<chirp_limit>x.xx</chirp_limit>". Reduce both by the same factor to reduce overall crunch time for the WU.

However, this makes exact performance projection difficult - for the most part, if you take the perceived benchmark speedup and use 50-60% of the value, that'll be what it does on BOINC itself. The only real or rather relevant benchmark is taking two identical systems and putting differing apps on them, then comparing times for similar AR WUs (RAC is also not a great tool for comparison).

Here's a link to a Linux benchmark script. It includes our test WUs as well as the default i386 Linux app (which probably won't be of much use to you, just replace it with the stock PPC one). Simply edit the variables at the start of the script to suit your needs and run it.

HTH,
Simon.

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