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Date: Fri, 05 Jun 2009 16:51:13 +0300 From: Pekka Enberg <penberg@...helsinki.fi> To: Corentin Chary <corentin.chary@...il.com> Cc: acpi4asus-user@...ts.sourceforge.net, len.brown@...el.com, linux-kernel@...r.kernel.org, Alan Jenkins <sourcejedi.lkml@...glemail.com> Subject: Re: [PATCH] eeepc-laptop: enable camera by default Hi Corentin, On Fri, 2009-06-05 at 15:02 +0200, Corentin Chary wrote: > > That said, I am more than happy to measure this but I need a little bit > > more information to get started as I have never used powertop. So what > > is it exactly you want me to do? > > PowerTop (with a corretly configured kernel) will give you a power > usage estimate. > > CONFIG_NO_HZ=y > CONFIG_TIMER_STATS=y > CONFIG_DEBUG_KERNEL=y > > For propers results, shutdown all services and just keep a shell > (without X or network). > You can also test that with and without the camera driver. I did not see a power usage estimate. I am running PowerTOP 1.11 that comes with Ubuntu 9.04. So I am not sure if what I did is what you wanted me to do but I ran "powertop -t 60 -d" with camera enabled and disabled and here are the results. Also, when I run plain powertop, it keeps complaining that some USB device causes wakeups (probably the camera?) and suggests suspending. But doing that doesn't seem to help things. Pekka Camera Disabled --------------- $ powertop -t 60 -d PowerTOP 1.11 (C) 2007, 2008 Intel Corporation Collecting data for 60 seconds Cn Avg residency C0 (cpu running) ( 0.0%) polling 0.0ms ( 0.0%) C1 0.0ms ( 0.0%) C2 0.9ms ( 0.0%) C3 966.9ms (100.1%) P-states (frequencies) Wakeups-from-idle per second : 1.2 interval: 60.0s no ACPI power usage estimate available Top causes for wakeups: 37.1% ( 0.6) <kernel core> : hrtimer_start (tick_sched_timer) 16.5% ( 0.3) <kernel core> : neigh_table_init_no_netlink (neigh_periodic_timer) 12.4% ( 0.2) <kernel core> : hrtimer_start_range_ns (tick_sched_timer) 8.2% ( 0.1) <interrupt> : acpi 6.2% ( 0.1) <kernel core> : sta_info_start (sta_info_cleanup) 4.1% ( 0.1) <interrupt> : ata_piix 4.1% ( 0.1) <kernel core> : page_writeback_init (wb_timer_fn) 4.1% ( 0.1) events/0 : queue_delayed_work (delayed_work_timer_fn) 1.0% ( 0.0) <interrupt> : PS/2 keyboard/mouse/touchpad 1.0% ( 0.0) <kernel core> : inet_initpeers (peer_check_expire) 1.0% ( 0.0) <kernel core> : queue_delayed_work (delayed_work_timer_fn) 1.0% ( 0.0) cifsoplockd : schedule_timeout (process_timeout) 1.0% ( 0.0) async/2 : scsi_request_fn (blk_rq_timed_out_timer) 1.0% ( 0.0) khungtaskd : schedule_timeout (process_timeout) 1.0% ( 0.0) <kernel core> : addrconf_verify (addrconf_verify) A USB device is active 100.0% of the time: USB device 1-5 : UB6225 (ENE) 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-rc8-eee uhci_hcd) 0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 100.0% USB device usb1 : EHCI Host Controller (Linux 2.6.30-rc8-eee ehci_hcd) Camera Enabled -------------- $ powertop -t 60 -d PowerTOP 1.11 (C) 2007, 2008 Intel Corporation Collecting data for 60 seconds Cn Avg residency C0 (cpu running) ( 0.0%) polling 0.0ms ( 0.0%) C1 0.0ms ( 0.0%) C2 1.0ms ( 0.0%) C3 91.9ms (100.0%) P-states (frequencies) Wakeups-from-idle per second : 11.1 interval: 60.0s no ACPI power usage estimate available Top causes for wakeups: 48.4% ( 10.6) <kernel core> : hrtimer_start (tick_sched_timer) 45.7% ( 10.0) <kernel core> : ehci_work (ehci_watchdog) 1.7% ( 0.4) <interrupt> : acpi 1.2% ( 0.3) <kernel core> : neigh_table_init_no_netlink (neigh_periodic_timer) 0.8% ( 0.2) <kernel core> : hrtimer_start_range_ns (tick_sched_timer) 0.6% ( 0.1) <interrupt> : ata_piix 0.5% ( 0.1) <kernel core> : sta_info_start (sta_info_cleanup) 0.3% ( 0.1) events/0 : queue_delayed_work (delayed_work_timer_fn) 0.3% ( 0.1) <kernel core> : page_writeback_init (wb_timer_fn) 0.1% ( 0.0) <interrupt> : PS/2 keyboard/mouse/touchpad 0.1% ( 0.0) khungtaskd : schedule_timeout (process_timeout) 0.1% ( 0.0) <kernel core> : hangcheck_init (hangcheck_fire) 0.1% ( 0.0) <kernel core> : addrconf_verify (addrconf_verify) 0.1% ( 0.0) pdflush : __make_request (blk_unplug_timeout) 0.1% ( 0.0) async/2 : scsi_request_fn (blk_rq_timed_out_timer) 0.1% ( 0.0) cifsoplockd : schedule_timeout (process_timeout) 0.1% ( 0.0) <kernel core> : queue_delayed_work (delayed_work_timer_fn) 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 Recent USB suspend statistics Active Device name 100.0% /sys/bus/usb/devices/1-8 100.0% USB device 1-5 : UB6225 (ENE) 0.0% USB device usb5 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 0.0% USB device usb4 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 0.0% USB device usb3 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 0.0% USB device usb2 : UHCI Host Controller (Linux 2.6.30-rc8-eee uhci_hcd) 100.0% USB device usb1 : EHCI Host Controller (Linux 2.6.30-rc8-eee ehci_hcd) Pekka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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