5.4-prerelease - hanging under load

Greg 'groggy' Lehey grog at FreeBSD.org
Sun Apr 3 21:57:42 PDT 2005

On Sunday,  3 April 2005 at 21:43:57 -0700, Nate Lawson wrote:
> Greg 'groggy' Lehey wrote:
>> I'm experiencing similar issues.  How can I confirm that this is the
>> case without rebooting the machine (which would be inconvenient)?  Is
>> there some sysctl that tells me?  I've taken a look, but I don't see
>> anything obvious.
> sysctl dev.cpu and look at the current frequency setting.

There's nothing there that reaches out and grabs me:

  dev.cpu.0.%desc: ACPI CPU
  dev.cpu.0.%driver: cpu
  dev.cpu.0.%location: handle=\_PR_.CPU0
  dev.cpu.0.%pnpinfo: _HID=none _UID=0
  dev.cpu.0.%parent: acpi0

> If low, then your system is affected and will be fixed soon when I
> mfc.  If not, perhaps you have an interrupt storm (vmstat -i)

No, nothing there:

  interrupt                          total       rate
  irq0: clk                      184217768        100
  irq1: atkbd0                         554          0
  irq4: sio0                      31529039         17
  irq7: ppc0                            47          0
  irq8: rtc                      235761929        128
  irq11: xl0 ohci1               555868535        301
  irq14: ata0                     19980318         10
  irq15: ata1                    169418181         91
  Total                         1196776371        649

See complete headers for address and phone numbers.
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