Date: Mon, 11 Sep 2000 23:24:03 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Maxim Sobolev <sobomax@FreeBSD.org> Cc: Valentin Nechayev <netch@segfault.kiev.ua>, freebsd-current@FreeBSD.org Subject: Re: load average is 1 when no processes active; etc. Message-ID: <Pine.BSF.4.21.0009112319280.1193-100000@besplex.bde.org> In-Reply-To: <39BCBE78.7D17B24B@FreeBSD.org>
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On Mon, 11 Sep 2000, Maxim Sobolev wrote:
> Bruce Evans wrote:
> > Well, the kernel just doesn't treat it specially, so it gets counted in the
> > load average. I'm not sure if the interrupt and other kernel processes
> > are counted. Since they do useful work, they should be. The idle process
> > does the not so useful work of heating the cpu, since it no longer halts
> > or runs vm_page_zero_idle().
>
> BTW, will it be fixed any time soon? Mobile users will certainly like to see idle process
> halting CPU as it was before.
Not sure. I use this quick fix:
---
diff -c2 kern_idle.c~ kern_idle.c
*** kern_idle.c~ Thu Sep 7 12:32:51 2000
--- kern_idle.c Sun Sep 10 18:06:39 2000
***************
*** 40,43 ****
--- 50,55 ----
#endif
+ extern void (*_hlt_vector)(void);
+
static void idle_setup(void *dummy);
SYSINIT(idle_setup, SI_SUB_SCHED_IDLE, SI_ORDER_FIRST, idle_setup, NULL)
***************
*** 90,94 ****
--- 102,116 ----
count = 0;
+ #ifdef __i386__
+ disable_intr();
+ #endif
while (count >= 0 && procrunnable() == 0) {
+ #ifdef __i386__
+ if (vm_page_zero_idle() != 0)
+ continue;
+ (*_hlt_vector)();
+ disable_intr();
+ continue;
+ #endif
/*
* This is a good place to put things to be done in
***************
*** 99,102 ****
--- 121,127 ----
" for a process");
}
+ #ifdef __i386__
+ enable_intr();
+ #endif
mtx_enter(&sched_lock, MTX_SPIN);
---
Add a bogus #include of <machine/md_var.h> to fix a warning.
Bruce
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