Load (computing): Difference between revisions

Revision as of 06:41, 13 March 2020

Revision as of 06:42, 13 March 2020

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== Reckoning CPU load ==

On Linux systems, the load-average is not calculated on each clock tick, but driven by a variable value that is based on the HZ frequency setting and tested on each clock tick. This setting defines the kernel clock tick rate in [[Hertz]] (times per second), and it defaults to 100 for 10mms10ms ticks. Kernel activities use this number of ticks to time themselves. Specifically, the timer.c::calc_load() function, which calculates the load average, runs every {{tt|1=LOAD_FREQ = (5*HZ+1)}} ticks, or about every five seconds:

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