http://defect.opensolaris.org/bz/show_bug.cgi?id=5546
Summary: interrupt storm on pad head
Classification: Development
Product: power-mgmt
Version: unspecified
Platform: Other
OS/Version: OpenSolaris
Status: NEW
Severity: minor
Priority: P4
Component: c-state
AssignedTo: bill.holler at sun.com
ReportedBy: aubrey.li at intel.com
CC: tesla-dev at opensolaris.org
Disable c-state from BIOS and leave HPET on, a huge number of interrupts
reported in powertop screen.
====================
OpenSolaris PowerTOP 1.1 (C) 2007 Intel Corporation
Collecting data for 5.00 second(s)
Cn Avg residency
C0 (cpu running) (10.8%)
C1 0.0ms (89.2%)
P-states (frequencies)
1596 Mhz 0.0%
1729 Mhz 0.0%
1862 Mhz 0.0%
1995 Mhz 0.0%
2128 Mhz 0.0%
2261 Mhz 0.0%
2394 Mhz 0.0%
2527 Mhz 0.0%
2660 Mhz 0.0%
2793 Mhz 0.0%
2926 Mhz 0.0%
3059 Mhz 100.0%
Wakeups-from-idle per second: 164369.5 interval: 5.0s
^^^^^^^^
Top causes for wakeups:
0.9% (1436.8) sched :<cross calls>
0.1% (100.1) <kernel> :genunix`clock
0.0% ( 23.4) <kernel> :uhci`uhci_handle_root_hub_status_change
0.0% ( 10.0) <kernel> :ata`ghd_timeout
==========================
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