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Re: [solarisx86] disable high resolution timeouts?

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  • John D Groenveld
    ... This is the last screen refresh of powertop before the host became unresponsive except to pings. Solaris PowerTOP version 1.3 C-states (idle power) Avg
    Message 1 of 4 , Feb 17, 2013
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      In message <51217CF5.9010107@...>, John Martin writes:
      >The kernel clock in Solaris 11.1 is still 10mS.
      >Only CLOCK_REALTIME user space timers changed
      >from 10mS (Solaris 11) to 1mS (Solaris 11.1).
      >Which user space timer is being used that you
      >believe the change causes an interrupt storm?

      This is the last screen refresh of powertop before the host became
      unresponsive except to pings.

      Solaris PowerTOP version 1.3

      C-states (idle power) Avg Residency P-states (frequencies)
      C0 (cpu running) (0.9%) 2200 Mhz 100.0%
      C1 3.1ms (99.1%)


      Wakeups-from-idle per second: 2835.7 interval: 30.0s
      no power usage estimate available

      Top causes for wakeups:
      10.2% (288.3) <interrupt> : bnx#0
      5.9% (166.8) <kernel> : ohci`ohci_handle_root_hub_status_change
      4.4% (123.8) <kernel> : genunix`clock
      2.7% ( 75.7) <interrupt> : mpt_sas#0
      2.6% ( 74.5) <kernel> : genunix`cv_wakeup
      2.2% ( 62.7) <kernel> : SDC`sysdc_update
      2.2% ( 62.5) <interrupt> : bnx#1
      0.7% ( 18.9) sched : <xcalls> unix`dtrace_xcall_func
      0.5% ( 14.2) <kernel> : ip`tcp_timer_callback



      The host was concurrently serving NFS on bnx0, writing to a NFS server
      on bnx1 and writing to a USB drive before it steadily slowed to a halt.

      John
      groenveld@...
    • John D Groenveld
      ... Whatever the cause, I m not able to reproduce with 11.1 SRU 4.5. John groenveld@acm.org
      Message 2 of 4 , Feb 24, 2013
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        In message <51217CF5.9010107@...>, John Martin writes:
        >Which user space timer is being used that you
        >believe the change causes an interrupt storm?

        Whatever the cause, I'm not able to reproduce with 11.1 SRU 4.5.

        John
        groenveld@...
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