Date: Sun, 25 Oct 2020 22:17:36 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Wojciech Puchar <wojtek@puchar.net> Cc: freebsd-hackers@freebsd.org Subject: Re: displaying total CPU usage Message-ID: <1b80bb1c-60ca-0b14-403f-a8e1a9d16f0b@grosbein.net> In-Reply-To: <alpine.BSF.2.20.2010251453160.79464@puchar.net> References: <alpine.BSF.2.20.2010231301550.3469@puchar.net> <20201023112030.GF1427@albert.catwhisker.org> <20201023114557.GX2643@kib.kiev.ua> <alpine.BSF.2.20.2010240957330.29620@puchar.net> <2eb77b40-99a5-c4cf-3df4-ceead23ad218@grosbein.net> <alpine.BSF.2.20.2010251453160.79464@puchar.net>
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25.10.2020 20:53, Wojciech Puchar wrote: >>>> >>>> `vmstat 1' readily provides the measurements. >> >> Please note that for multi-core CPU averaging might yield misleading results >> indicating lots of available/under-loaded CPU power when one of cores it already 100% bound. > not in a case of mostly userland load without any pinning. In that case, too. Absense of pinning for CPU-hungry single-threaded process does not allow it to utilize power of multiple cores and you still may get 50% load for 2-core system but no free CPU cycles for such process.
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