Regression: 20 ACPI interrupts per second on EEEPC 4G

Alan Jenkins
2009-04-10T15:35:26Z

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On latest git, powertop shows 20 ACPI interrupts per second.
Previously, this was closer to 1 per second. See attached output (a vs
b, "a" is from 2.6.29-rc8).

This is from a pretty sparse KDE desktop. Normally I run
gnome-power-manager, but I killed it to make sure that wasn't causing
any problems.

alan@alan-eeepc:/sys/firmware/acpi/interrupts$ grep -v "invalid" *
error: 0
ff_gbl_lock: 0 enabled
ff_pwr_btn: 0 enabled
ff_rt_clk: 0 disabled
gpe03: 0 disabled
gpe04: 0 disabled
gpe05: 0 disabled
gpe09: 0 disabled
gpe0B: 0 disabled
gpe0C: 0 disabled
gpe0D: 0 disabled
gpe0E: 0 disabled
gpe18: 60975 enabled
gpe_all: 60975
sci: 60975

which I presume means lots of EC interrupts.

[ 0.134068] ACPI: EC: GPE = 0x18, I/O: command/status = 0x66, data = 0x62

Any ideas?

Thanks
Alan

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PowerTOP 1.11 (C) 2007, 2008 Intel Corporation

Collecting data for 100 seconds

Cn Avg residency
C0 (cpu running) ( 0.0%)
polling 0.0ms ( 0.0%)
C1 0.1ms ( 0.0%)
C2 0.0ms ( 0.0%)
C3 93.5ms (100.0%)
P-states (frequencies)
Wakeups-from-idle per second : 10.7 interval: 100.0s
no ACPI power usage estimate available
Top causes for wakeups:
17.0% ( 2.0) <interrupt> : ehci_hcd:usb1, uhci_hcd:usb2
15.1% ( 1.8) <interrupt> : extra timer interrupt
12.7% ( 1.5) udevd : ehci_work (ehci_watchdog)
8.6% ( 1.0) Xorg : schedule_hrtimeout_range (hrtimer_wakeup)
8.5% ( 1.0) kwrapper : do_nanosleep (hrtimer_wakeup)
8.5% ( 1.0) kwin : schedule_hrtimeout_range (hrtimer_wakeup)
8.5% ( 1.0) USB device 1-5 : UB6225 (ENE)
4.2% ( 0.5) hald-addon-stor : schedule_hrtimeout_range (hrtimer_wakeup)
2.4% ( 0.3) <interrupt> : ata_piix
2.1% ( 0.2) NetworkManager : atl2_open (atl2_watchdog)
1.8% ( 0.2) <interrupt> : acpi
1.7% ( 0.2) kded : schedule_hrtimeout_range (hrtimer_wakeup)
1.7% ( 0.2) <kernel core> : page_writeback_init (wb_timer_fn)
1.6% ( 0.2) init : schedule_hrtimeout_range (hrtimer_wakeup)
1.0% ( 0.1) <kernel module> : neigh_table_init_no_netlink (neigh_periodic_timer)
1.0% ( 0.1) <kernel core> : neigh_table_init_no_netlink (neigh_periodic_timer)
0.8% ( 0.1) ssh-agent : schedule_hrtimeout_range (hrtimer_wakeup)
0.8% ( 0.1) klauncher : schedule_hrtimeout_range (hrtimer_wakeup)
0.3% ( 0.0) <kernel module> : acpi_thermal_check (acpi_thermal_run)
0.3% ( 0.0) scsi_scan_2 : blk_add_timer (blk_rq_timed_out_timer)
0.3% ( 0.0) <kernel core> : blk_add_timer (blk_rq_timed_out_timer)
0.3% ( 0.0) hald : schedule_hrtimeout_range (hrtimer_wakeup)
0.2% ( 0.0) kdesktop : schedule_hrtimeout_range (hrtimer_wakeup)
0.2% ( 0.0) <kernel core> : queue_delayed_work (delayed_work_timer_fn)
0.2% ( 0.0) kicker : schedule_hrtimeout_range (hrtimer_wakeup)
0.1% ( 0.0) <interrupt> : PS/2 keyboard/mouse/touchpad
0.1% ( 0.0) cron : do_nanosleep (hrtimer_wakeup)
0.1% ( 0.0) <kernel core> : addrconf_verify (addrconf_verify)
0.1% ( 0.0) <kernel core> : inet_initpeers (peer_check_expire)
0.1% ( 0.0) rsyslogd : futex_wait (hrtimer_wakeup)

A USB device is active 100.0% of the time:
USB device 1-5 : UB6225 (ENE)

Suggestion: Enable USB autosuspend by pressing the U key or adding
usbcore.autosuspend=1 to the kernel command line in the grub config

Suggestion: increase the VM dirty writeback time from 4.99 to 15 seconds with:
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
This wakes the disk up less frequently for background VM activity

Suggestion: Disable 'hal' from polling your cdrom with:
hal-disable-polling --device /dev/cdrom 'hal' is the component that auto-opens a
window if you plug in a CD but disables SATA power saving from kicking in.

Recent USB suspend statistics
Active Device name
100.0% USB device 1-5 : UB6225 (ENE)
0.0% USB device usb5 : UHCI Host Controller (Linux 2.6.29-rc8eeepc uhci_hcd)
0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.29-rc8eeepc uhci_hcd)
0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.29-rc8eeepc uhci_hcd)
0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.29-rc8eeepc uhci_hcd)
100.0% USB device usb1 : EHCI Host Controller (Linux 2.6.29-rc8eeepc ehci_hcd)

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PowerTOP 1.11 (C) 2007, 2008 Intel Corporation

Collecting data for 100 seconds

Cn Avg residency
C0 (cpu running) ( 0.3%)
polling 0.0ms ( 0.0%)
C1 0.0ms ( 0.0%)
C2 1.1ms ( 0.0%)
C3 42.1ms (99.7%)
P-states (frequencies)
Wakeups-from-idle per second : 23.9 interval: 100.0s
no ACPI power usage estimate available
Top causes for wakeups:
64.2% ( 19.7) <interrupt> : acpi
10.6% ( 3.3) events/0 : queue_delayed_work (delayed_work_timer_fn)
9.0% ( 2.8) <interrupt> : extra timer interrupt
3.4% ( 1.0) kwin : hrtimer_start_range_ns (hrtimer_wakeup)
3.3% ( 1.0) Xorg : hrtimer_start_range_ns (hrtimer_wakeup)
3.3% ( 1.0) kwrapper : hrtimer_start_range_ns (hrtimer_wakeup)
0.8% ( 0.2) <interrupt> : ata_piix
0.8% ( 0.2) NetworkManager : atl2_open (atl2_watchdog)
0.7% ( 0.2) <kernel core> : page_writeback_init (wb_timer_fn)
0.7% ( 0.2) kded : hrtimer_start_range_ns (hrtimer_wakeup)
0.6% ( 0.2) init : hrtimer_start_range_ns (hrtimer_wakeup)
0.4% ( 0.1) <kernel core> : add_timer (neigh_periodic_timer)
0.4% ( 0.1) <kernel module> : add_timer (neigh_periodic_timer)
0.3% ( 0.1) ssh-agent : hrtimer_start_range_ns (hrtimer_wakeup)
0.3% ( 0.1) kdesktop : hrtimer_start_range_ns (hrtimer_wakeup)
0.2% ( 0.1) konsole : hrtimer_start_range_ns (hrtimer_wakeup)
0.2% ( 0.1) knetworkmanager : hrtimer_start_range_ns (hrtimer_wakeup)
0.2% ( 0.1) kmix : hrtimer_start_range_ns (hrtimer_wakeup)
0.1% ( 0.0) kicker : hrtimer_start_range_ns (hrtimer_wakeup)
0.1% ( 0.0) hald : hrtimer_start_range_ns (hrtimer_wakeup)
0.1% ( 0.0) async/1 : blk_add_timer (blk_rq_timed_out_timer)
0.1% ( 0.0) pdflush : blk_plug_device (blk_unplug_timeout)
0.1% ( 0.0) <kernel core> : queue_delayed_work (delayed_work_timer_fn)
0.0% ( 0.0) <interrupt> : PS/2 keyboard/mouse/touchpad
0.0% ( 0.0) <interrupt> : uhci_hcd:usb5, HDA Intel, i915@pci:0000:00:02.0
0.0% ( 0.0) <kernel module> : queue_delayed_work (delayed_work_timer_fn)
0.0% ( 0.0) hd-audio0 : schedule_timeout_uninterruptible (process_timeout)
0.0% ( 0.0) cron : hrtimer_start_range_ns (hrtimer_wakeup)
0.0% ( 0.0) rsyslogd : hrtimer_start_range_ns (hrtimer_wakeup)
0.0% ( 0.0) khungtaskd : schedule_timeout_interruptible (process_timeout)
0.0% ( 0.0) <kernel module> : add_timer (addrconf_verify)
0.0% ( 0.0) <kernel core> : add_timer (peer_check_expire)

A USB device is active 100.0% of the time:
USB device 1-5 : UB6225 (ENE)

Suggestion: Enable USB autosuspend by pressing the U key or adding
usbcore.autosuspend=1 to the kernel command line in the grub config

Suggestion: increase the VM dirty writeback time from 5.00 to 15 seconds with:
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
This wakes the disk up less frequently for background VM activity

Recent USB suspend statistics
Active Device name
100.0% USB device 1-5 : UB6225 (ENE)
0.0% USB device usb5 : UHCI Host Controller (Linux 2.6.30-rc1eeepc uhci_hcd)
0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.30-rc1eeepc uhci_hcd)
0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.30-rc1eeepc uhci_hcd)
0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.30-rc1eeepc uhci_hcd)
100.0% USB device usb1 : EHCI Host Controller (Linux 2.6.30-rc1eeepc ehci_hcd)