Semi-working patch for amd64 suspend/resume

[Alexander Motin]

Nate Lawson wrote:
>> The only strange effect I have noticed was incorrect CPU time some
>> processes got:
>> %ps ax
>>   PID  TT  STAT      TIME COMMAND
>>    12  ??  WL   280503:38,05 [intr]
>>  1430  ??  Ss   280503:38,34 icewm
>>
>> But I think it is more timer driver related then resume itself.
> 
> If you are using the LAPIC timer (default), it won't be running properly
> during resume.  However, this wide discrepancy seems to indicate that
> the timer state is not being resumed properly.  What if you use the ACPI
> timer (hw.timecounter.* I think are the sysctls)?

As I understand, I am now using LAPIC timer for HZ generation, ACPI-fast 
as time source and TSC as kernel DELAY() source.

%sysctl -a | grep timecounter
kern.timecounter.tick: 1
kern.timecounter.choice: TSC(-100) ACPI-fast(1000) HPET(900) i8254(0) 
dummy(-1000000)
kern.timecounter.hardware: ACPI-fast
kern.timecounter.nsetclock: 3
kern.timecounter.ngetmicrotime: 353840
kern.timecounter.ngetnanotime: 481
kern.timecounter.ngetbintime: 0
kern.timecounter.ngetmicrouptime: 2014472
kern.timecounter.ngetnanouptime: 8950060
kern.timecounter.ngetbinuptime: 419099
kern.timecounter.nmicrotime: 1460084
kern.timecounter.nnanotime: 40830
kern.timecounter.nbintime: 1500942
kern.timecounter.nmicrouptime: 2210
kern.timecounter.nnanouptime: 21
kern.timecounter.nbinuptime: 1988392
kern.timecounter.stepwarnings: 0
kern.timecounter.tc.i8254.mask: 65535
kern.timecounter.tc.i8254.counter: 46767
kern.timecounter.tc.i8254.frequency: 1193182
kern.timecounter.tc.i8254.quality: 0
kern.timecounter.tc.HPET.mask: 4294967295
kern.timecounter.tc.HPET.counter: 3274417396
kern.timecounter.tc.HPET.frequency: 14318180
kern.timecounter.tc.HPET.quality: 900
kern.timecounter.tc.ACPI-fast.mask: 16777215
kern.timecounter.tc.ACPI-fast.counter: 14616414
kern.timecounter.tc.ACPI-fast.frequency: 3579545
kern.timecounter.tc.ACPI-fast.quality: 1000
kern.timecounter.tc.TSC.mask: 4294967295
kern.timecounter.tc.TSC.counter: 3757339660
kern.timecounter.tc.TSC.frequency: 2394021468
kern.timecounter.tc.TSC.quality: -100
kern.timecounter.smp_tsc: 0
kern.timecounter.invariant_tsc: 1

There is sure some problem with LAPIC:
%vmstat -i
interrupt                          total       rate
.....
irq257: bge0                       70774         29
cpu1: timer                        17600          7
cpu1: timer                        27617         11
cpu1: timer                        15849          6
cpu1: timer                        15413          6
cpu1: timer                       877180        367
Total                            2284801        957

-- 
Alexander Motin