Date: Wed, 12 Dec 2007 10:06:27 -0800 From: Nate Lawson <nate@root.org> To: Ken Menzel <kenm@icarz.com> Cc: freebsd-acpi@freebsd.org Subject: Re: CURRENTand releng_7 kernel makes the system run very very hot Message-ID: <47602323.2010807@root.org> In-Reply-To: <13a701c83ce4$e94bfb20$8adb7bd1@icarz.com> References: <13a701c83ce4$e94bfb20$8adb7bd1@icarz.com>
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Ken Menzel wrote:
> It has been suggested to me to move this thread from current to acpi.
> From what I can tell the CPU's do not halt on idle. Top -SH from a
> system booted for a few hours on releng_7 or on current shows hours of
> time used where as releng_6 used only minutes or seconds. This is
> causing some sytems to overheat.
>
> I am trying to compile all the relevant information in this e-mail. If I
> have missed anything please let me kow. I can also provide ssh access
> to a developer who would like to see the problem. I see the problem on
> both AMD64 kernel and i386 kernel single and multi processor.
>
> Here is information I have gather so far: Is there anything else needed
> for the PR?
The below information is confusing. It lists C1 as the lowest idle
state, which is a simple HLT instruction. There should be no problem
for that to stop your CPU. So something is keeping your system from
executing that instruction.
If you could put a printf inside this if statement:
if (cpu_disable_idle) {
ACPI_ENABLE_IRQS();
return;
}
And also this one:
if (cx_next->type == ACPI_STATE_C1) {
sc->cpu_prev_sleep = 1000000 / hz;
acpi_cpu_c1();
return;
}
That might help see what's happening.
> http://www.kodem.com/ports/kenfreebsd-dell2950.asl
>
> http://www.kodem.com/ports/dmesg-dell2950.txt
> barclay# top -SH
> last pid: 833; load averages: 0.12, 0.03, 0.01 up 0+00:44:45
> 11:12:22
> 73 processes: 9 running, 46 sleeping, 18 waiting
> CPU states: 0.0% user, 0.0% nice, 0.6% system, 0.2% interrupt, 99.2%
> idle
> Mem: 9816K Active, 138M Inact, 181M Wired, 48K Cache, 214M Buf, 3611M Free
> Swap: 12G Total, 12G Free
>
> PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
> 14 root 171 ki31 0K 16K CPU4 4 44:14 100.00% idle: cpu4
> 15 root 171 ki31 0K 16K CPU3 3 44:07 100.00% idle: cpu3
> 18 root 171 ki31 0K 16K RUN 0 43:48 100.00% idle: cpu0
> 13 root 171 ki31 0K 16K CPU5 5 43:47 100.00% idle: cpu5
> 16 root 171 ki31 0K 16K CPU2 2 43:42 100.00% idle: cpu2
> 17 root 171 ki31 0K 16K CPU1 1 43:38 100.00% idle: cpu1
> 12 root 171 ki31 0K 16K CPU6 6 43:19 100.00% idle: cpu6
> 11 root 171 ki31 0K 16K CPU7 7 43:15 100.00% idle: cpu7
> barclay# sysctl hw.acpi
> hw.acpi.supported_sleep_state: S4 S5
> hw.acpi.power_button_state: S5
> hw.acpi.sleep_button_state: S4
> hw.acpi.lid_switch_state: NONE
> hw.acpi.standby_state: S1
> hw.acpi.suspend_state: S3
> hw.acpi.sleep_delay: 1
> hw.acpi.s4bios: 0
> hw.acpi.verbose: 0
> hw.acpi.disable_on_reboot: 0
> hw.acpi.handle_reboot: 0
> hw.acpi.cpu.cx_lowest: C1
--
Nate
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