Fix RDTSC calibration in ext_hotprofiler #1488
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Do a busy loop instead of usleep(5000), since usleep(5000) causes the CPU to halt, giving meaningless results. Originally submitted by Tim Starling as pull request facebook#65 for preinheimer/xhprof.
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@atdt, we don't appear to have a CLA for you on file. (Is this covered by an organization CLA from Wikimedia?) Let me know what the deal is here (or fill one out at https://developers.facebook.com/opensource/cla or see https://github.com/facebook/hhvm/blob/master/CONTRIBUTING.md for the alternate method) before I take a look at the pull. Thanks! |
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@scannell: Uploaded CLA here: https://noc.wikimedia.org/~ori/OriLivneh-FacebookContribAgreement.pdf Thanks! |
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Thanks @atdt! I'll take a look now. |
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Do a busy loop instead of usleep(5000), since usleep(5000) causes the
CPU to halt, giving meaningless results.
Originally submitted by Tim Starling to preinheimer/xhprof#65.