Date: Mon, 10 Dec 2007 23:06:47 +0100 From: Rene Ladan <r.c.ladan@gmail.com> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: Martin Cracauer <cracauer@cons.org>, freebsd-current@freebsd.org, Thomas Sparrevohn <Thomas.Sparrevohn@btinternet.com> Subject: Re: CURRENT Kernel makes the system run very very hot Message-ID: <475DB877.1060306@gmail.com> In-Reply-To: <28655.1197320193@critter.freebsd.dk> References: <28655.1197320193@critter.freebsd.dk>
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Poul-Henning Kamp schreef:
> In message <20071210201106.GB90158@cons.org>, Martin Cracauer writes:
>
> I installed this on my laptop yesterday:
>
> FreeBSD critter.freebsd.dk 8.0-CURRENT FreeBSD 8.0-CURRENT
> #0: Sun Dec 9 10:41:25 UTC 2007
> root@critter.freebsd.dk:/usr/obj/freebsd/src/sys/C5 i386
>
> And it does indeed look like the idle threads do not HLT the cpu.
>
> Interestingly, powerd(8) does the right thing and throttles down
> the cpu clock even though the idle threads churn away.
>
> top -HS shows:
>
> PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 10 root 171 ki31 0K 16K CPU1 1 25.2H 100.00% {idle: cpu1}
> 10 root 171 ki31 0K 16K RUN 0 25.2H 95.36% {idle: cpu0}
> 928 phk 45 0 319M 68624K *Giant 0 42:46 0.98% Xorg
> 28654 phk 44 0 3540K 1552K CPU1 0 0:01 0.98% top
> 982 phk 44 0 6500K 3940K select 1 11:03 0.29% xterm
> 11 root -24 - 0K 112K WAIT 1 19:49 0.00% {swi6: task queu
>
Similar results here:
last pid: 1698; load averages: 0.18, 0.08, 0.02 up 0+02:09:26 23:00:57
139 processes: 4 running, 116 sleeping, 19 waiting
CPU states: % user, % nice, % system, % interrupt, % idle
Mem: 250M Active, 211M Inact, 119M Wired, 19M Cache, 112M Buf, 1405M Free
Swap: 4062M Total, 4062M Free
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
10 root 171 ki31 0K 16K RUN 0 242:19 91.21% {idle: cpu0}
10 root 171 ki31 0K 16K RUN 1 242:19 84.72% {idle: cpu1}
hw.acpi.thermal.tz0.temperature goes up from ~35C to >47C after logging in at the
console. The box is otherwise idle.
This is with SCHED_4BSD, PREEMPTION, IPI_PREEMPTION, MPTABLE_FORCE_HTT, STOP_NMI
and the debugging options for CURRENT.
Note that the TIME values are doubled in top (242:19 == 04:02:19 ~= 2*(02:09:26) )
Regards,
Rene
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