Date: Tue, 08 Apr 2003 07:26:48 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Alex.Wilkinson@dsto.defence.gov.au Cc: Dag-Erling Smorgrav <des@ofug.org> Subject: Re: SCHED_ULE question Message-ID: <3E92DC28.6281F203@mindspring.com> References: <20030407143118.V1049@squirm.dsto.defence.gov.au> <20030408161241.S70285@squirm.dsto.defence.gov.au>
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"Wilkinson,Alex" wrote: > Cool, thanks for that, but what's the diff between: > > #sysctl kern.quantum > kern.quantum: 100000 > > AND > > #sysctl kern.quntum > sysctl: unknown oid 'kern.quntum' You mispelled it... but it's not there in SCHED_ULE. > What is meant to 'quantum' ? A quantum is the longest interval that a process is allowed to run in the presence of another ready-to-run process existing, without voluntarily releasing the CPU for another process to run (e.g. by making a blocking system call that doesn't result in a threads context switch to another thread in the same process). It is the granularity at which some schedulers implement time sharing. Use a search engine to search for the independent terms: scheduler quantum See also: lbolt -- Terry
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