[issue46788] regrtest fails to start on missing performance counter names

[Steve Dower]

Steve Dower <steve.dower at python.org> added the comment:

"So close" being some months ago ;)

I need to retrigger address sanitiser so that it passes before merging, but after that, I'll merge (and hopefully the backport is clean).

Copying Eryk Sun's comment here for posterity:

This would be less fragile and more useful in general if support were added to _winapi for PdhOpenQueryW(), PdhAddEnglishCounterW(), PdhCollectQueryData(), PdhCollectQueryDataEx(), PdhGetFormattedCounterValue(), and PdhCloseQuery(). The English counter name is "\System\Processor Queue Length" -- no need to worry about localized names, hard-coded values, or hard-coded struct sizes and offsets.

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