Date: Sat, 20 Oct 2001 09:07:17 -0700 (PDT) From: Ian Dowse <iedowse@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern kern_synch.c Message-ID: <200110201607.f9KG7HW76954@freefall.freebsd.org>
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iedowse 2001/10/20 09:07:17 PDT
Modified files:
sys/kern kern_synch.c
Log:
Introduce some jitter to the timing of the samples that determine
the system load average. Previously, the load average measurement
was susceptible to synchronisation with processes that run at
regular intervals such as the system bufdaemon process.
Each interval is now chosen at random within the range of 4 to 6
seconds. This large variation is chosen so that over the shorter
5-minute load average timescale there is a good dispersion of
samples across the 5-second sample period (the time to perform 60
5-second samples now has a standard deviation of approx 4.5 seconds).
Revision Changes Path
1.164 +15 -4 src/sys/kern/kern_synch.c
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