Details
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Bug
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Resolution: Won't Fix
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Major
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None
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Security Level: Public
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None
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CBG Sprint 26
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5
Description
During perf testing on a 48 core machine, one perf stat measuring the CPU usage via top was showing ~4000% (i.e. all cores running at ~85%)
However, the process_cpu_percent_utilization stat, was only ever showing about 800%
After looking at the code that calculates this stat a little (calculateProcessCpuPercentage), it's non-trivial, so we need to verify it's doing the right thing, and determine the reason for the huge difference above.