Date: Sun, 1 Feb 2004 22:59:14 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Jeff Roberson <jroberson@chesapeake.net> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/kern sched_4bsd.c Message-ID: <20040201224736.P8564@gamplex.bde.org> In-Reply-To: <20040201012325.U36463-100000@mail.chesapeake.net> References: <20040201012325.U36463-100000@mail.chesapeake.net>
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On Sun, 1 Feb 2004, Jeff Roberson wrote: > On Sat, 31 Jan 2004, Jeff Roberson wrote: > > > jeff 2004/01/31 22:20:18 PST > > > > FreeBSD src repository > > > > Modified files: > > sys/kern sched_4bsd.c > > Log: > > - Disable ithread binding in all cases for now. This doesn't make as much > > sense with sched_4bsd as it does with sched_ule. > > - Use P_NOLOAD instead of the absence of td->td_ithd to determine whether or > > not a thread should be accounted for in sched_tdcnt. > > Well, this never reports a load of less than 1, but it's more "correct" > than it was. Bruce, do you know why it's not going lower than 1? This is because P_NOLOAD is used before it is set for the pagezero thread. Unlike other threads, pagezero sets P_NOLOAD after it starts running. So sched_tdcnt is incremented when pagezero is first run. Then when it switches after setting P_NOLOAD, sched_tdcnt is not decremented. Bruce
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