* Woodruff, Richard <r-woodruff2@xxxxxx> [080213 14:16]: > Hi, > > A bit of fun is working is slowly working its way to the tree. After a > couple teaks and a little c-state patch from Kevin Hilman it looks like > powertop will be able to live on ARM/OMAP3. > > Our first pass of internal code has come together enough to have cpuidle > + cpufreq running ++. Hopefully, after some time and more work that > reference can be leveraged to see the same on kernel.org. Lots of work > to do on that path... > > If the png picture makes it, it can be seen given the load which was > running, all C-States have been touched and most P-States! The P-State > picture only has ARM displayed, might be nice to see if Intel is open to > listing speed for the other asymmetric processors and the IO domain. > Given the background load residency isn't so great, but OFF mode is > being touched. > > In the current definition: > C0 - wfi > C1 - wfi + dtick > C2 - mpu-retention, core-active > C3 - mpu-off, core-active > C4 - mpu-ret, core-ret > C5 - mpu-off, core-ret > C6 - mpu-off, core-off (0-volts) > > Thanks to Adam Belay for cpuidle work! > > Regards, > Richard W. > > root@xxxxxxxxxxxxx:/tst# ./powertop-static -d -t 60 > PowerTOP 1.9 (C) 2007 Intel Corporation > > Collecting data for 60 seconds > Cn Avg residency > C0 (cpu running) ( 7.9%) > C1 934.7ms (89.0%) > C2 44.4ms ( 2.7%) > C3 0.0ms ( 0.0%) > C4 5.5ms ( 0.3%) > C5 3.5ms ( 0.2%) > C6 0.4ms ( 0.0%) > P-states (frequencies) > 550 Mhz 8.0% > 500 Mhz 0.0% > 250 Mhz 0.0% > 125 Mhz 92.0% > Wakeups-from-idle per second : 2.9 interval: 60.0s > Top causes for wakeups: > 56.8% ( 12.4) <interrupt> : 32KHz timer > 11.4% ( 2.5) <interrupt> : prcm > 10.4% ( 2.3) <interrupt> : eth0 > 7.3% ( 1.6) bash : queue_delayed_work_on > (delayed_work_timer_fn > ) > 4.6% ( 1.0) <kernel core> : __netdev_watchdog_up (dev_watchdog) > 2.3% ( 0.5) <kernel core> : queue_delayed_work_on > (delayed_work_timer_fn > ) > 1.5% ( 0.3) <kernel core> : irlmp_start_discovery_timer > (irlmp_discovery > _timer_expired) > 1.5% ( 0.3) mvltd : schedule_timeout (process_timeout) > 1.1% ( 0.2) <kernel core> : neigh_table_init_no_netlink > (neigh_periodic_ > timer) > 0.9% ( 0.2) <kernel core> : page_writeback_init (wb_timer_fn) > 0.9% ( 0.2) init : schedule_timeout (process_timeout) > 0.2% ( 0.1) <kernel core> : sk_reset_timer (tcp_delack_timer) > 0.2% ( 0.1) in.telnetd : sk_reset_timer (tcp_write_timerS > 0.2% ( 0.1) <kernel core> : neigh_update (neigh_timer_handler) > 0.2% ( 0.0) <interrupt> : serial > 0.2% ( 0.0) <kernel core> : cache_register > (delayed_work_timer_fn) > 0.1% ( 0.0) <kernel core> : ip_rt_init (rt_check_expire) > 0.1% ( 0.0) powertop-static : schedule_timeout (process_timeout) Cool :) Nice to see the timer interrupts are also pretty low nowadays with dyntick / NO_HZ. Tony _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
