Hello,
After I installed Fedora 12 updated to the latest updates available I am seeing
a new interrupt causing wake ups in powertop:
Cn Avg residency
C0 (cpu ejecutando) ( 0,1%)
polling 0,0ms ( 0,0%)
C1 halt 0,0ms ( 0,0%)
C2 1,1ms ( 0,8%)
C3 53,6ms (99,1%)
P-states (frequencies)
1,84 Ghz 0,1%
1333 Mhz 0,0%
1000 Mhz 99,9%
Wakeups-from-idle per second : 26,2 interval: 15,0s
las estimaciones de ACPI sobre el uso de corriente no están disponibles
Top causes for wakeups:
33,3% ( 7,5) <interrupt> : ata_piix
31,6% ( 7,1) <núcleo> : hrtimer_start_range_ns (tick_sched_timer)
10,6% ( 2,4) <núcleo> : hrtimer_start (tick_sched_timer)
4,4% ( 1,0) <núcleo> : __mod_timer (br_fdb_cleanup)
4,4% ( 1,0) <núcleo> : __mod_timer (b44_timer)
2,4% ( 0,5) <núcleo> : __mod_timer (br_hello_timer_expired)
2,1% ( 0,5) iwl3945 : queue_delayed_work (delayed_work_timer_fn)
2,1% ( 0,5) devkit-disks-da : hrtimer_start_range_ns (hrtimer_wakeup)
1,5% ( 0,3) <núcleo> : __mod_timer (neigh_periodic_timer)
1,2% ( 0,3) clock-applet : hrtimer_start_range_ns (hrtimer_wakeup)
As you can see, ata_piix is at the top all the time, in previous versions of
Fedora it just showed up for a little while and then disappeared.
Coincidentally I started playing a little bit with sysprof (from
updates-testing) and running for about 5 minutes on a completely idle Fedora
system running Gnome I see the following:
[Everything] 0,00% 100,00%
[pgrep] 0,00% 17,32%
[hald] 0,00% 14,71%
[scsi_eh_1] 0,00% 13,41%
- - kernel - - 0,00% 13,41%
kernel_thread_helper 0,00% 13,41%
kthread 0,00% 13,41%
scsi_error_handler 0,00% 13,41%
ata_scsi_error 0,00% 12,66%
ata_sff_error_handler 0,00% 11,92%
ata_do_eh 0,00% 10,80%
ata_eh_autopsy 0,00% 10,61%
ata_eh_link_autopsy 0,00% 10,61%
atapi_eh_request_sense 0,00% 10,61%
ata_exec_internal 0,00% 10,61%
ata_exec_internal_sg 0,00% 10,24%
perf_swcounter_hrtimer 0,00% 9,68%
perf_counter_overflow 0,00% 9,68%
perf_counter_output 0,00% 9,68%
_spin_unlock_irqrestore 9,68% 9,68%
ata_sff_post_internal_cmd 0,00% 0,19%
wait_for_completion_timeout 0,00% 0,19%
irq_exit 0,00% 0,19%
perf_swcounter_hrtimer 0,00% 0,37%
perf_swcounter_hrtimer 0,00% 0,19%
perf_swcounter_hrtimer 0,00% 1,12%
scsi_eh_flush_done_q 0,00% 0,74%
schedule 0,00% 0,37%
scsi_run_host_queues 0,00% 0,19%
perf_swcounter_hrtimer 0,00% 0,19%
[ps] 0,00% 11,73%
[devkit-disks-daemon: polling /dev/sr0] 0,00% 7,82%
In file /usr/libexec/devkit-disks-daemon 0,00% 7,82%
Look that by itself [scsi_eh_1] is taking 13% of the execution time which I
guess it's related to the cdrom drive and I guess this is related to the wake
ups from powertop in the ata_piix interrupt.
I'm really worried a little bit by this because my laptop seems more power
hungry with Fedora 12 than with Fedora 10 or 11.
Why is this? Is this a known problem? maybe someone can give me a hint about
what package should I file a bug report to.
Thanks in advance,
-William
Encuentra las mejores recetas en Yahoo! Cocina.
http://mx.mujer.yahoo.com/cocina/
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