[Bug 192315] high load average while idle, slow keyboard reaction

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192315

--- Comment #9 from Alexander Motin <mav at FreeBSD.org> ---
(In reply to Steve Wills from comment #8)
> (In reply to Alexander Motin from comment #5)
> > That does not tell much after you enabled HPET, except that your system does
> > have C-states. Reboot without switching to HPET and check again. If C-states
> > block working, you should not see states deeper then C1 used even if enabled.
> 
> Ok, rebooted without setting HPET:
> 
> meatwad% sysctl kern.timecounter.hardware kern.eventtimer.timer
> kern.timecounter.hardware: TSC-low
> kern.eventtimer.timer: LAPIC
> meatwad% sysctl dev.cpu | grep cx_usage
> dev.cpu.0.cx_usage: 22.28% 77.71% 0.00% last 1359us
> dev.cpu.0.cx_usage_counters: 17048 59466 0
> dev.cpu.1.cx_usage: 21.54% 78.45% 0.00% last 939us
> dev.cpu.1.cx_usage_counters: 17294 62983 0
> dev.cpu.2.cx_usage: 31.10% 68.89% 0.00% last 1146us
> dev.cpu.2.cx_usage_counters: 33021 73155 0
> dev.cpu.3.cx_usage: 21.15% 78.84% 0.00% last 738us
> dev.cpu.3.cx_usage_counters: 18109 67474 0
> dev.cpu.4.cx_usage: 21.94% 78.05% 0.00% last 447us
> dev.cpu.4.cx_usage_counters: 18022 64084 0
> dev.cpu.5.cx_usage: 22.70% 77.29% 0.00% last 682us
> dev.cpu.5.cx_usage_counters: 18103 61637 0
> dev.cpu.6.cx_usage: 26.53% 73.46% 0.00% last 430us
> dev.cpu.6.cx_usage_counters: 33056 91541 0
> dev.cpu.7.cx_usage: 22.60% 77.39% 0.00% last 6us
> dev.cpu.7.cx_usage_counters: 16724 57250 0
> meatwad% sysctl -a | grep cx_lowest
> hw.acpi.cpu.cx_lowest: C8
> dev.cpu.0.cx_lowest: C8
> dev.cpu.1.cx_lowest: C8
> dev.cpu.2.cx_lowest: C8
> dev.cpu.3.cx_lowest: C8
> dev.cpu.4.cx_lowest: C8
> dev.cpu.5.cx_lowest: C8
> dev.cpu.6.cx_lowest: C8
> dev.cpu.7.cx_lowest: C8
> meatwad%

Hmm. It looks like the deepest C-state was actually disabled automatically.
Then it is surprising to have any problem with LAPIC. But, just to be sure that
BIOS does not fool us, could you disable all C-states completely with something
like this in rc.conf:
performance_cx_lowest="C1"
economy_cx_lowest="C1"
, and if it won't help, also disable C1E in BIOS.

-- 
You are receiving this mail because:
You are the assignee for the bug.