Amit Kucheria <amit.kucheria@xxxxxxxxxxxxx> writes:
> Hi,
>
> I am testing twl4030 script optimisations on the current PM branch. But I am
> seeing the board (RX51) freeze when CPU_IDLE is enabled in the config.
>
> Is it known to work on other boards?
Yes, and it works for me on RX51 as well, output of the maemo powertop
below.
For a known working defconfig, start from omap3_pm_defconfig and
change the low-level debug UART from UART1 to UART3.
There is a known UART bug in the current PM branch where if you don't
'echo 1 > /debug/pm_debug/sleep_while_idle', the UART eventually locks
up when the inactivity timer expires. I'm still looking into this
one.
Kevin
/ # powertop
Powertop 1.13.1
status: Unable to send message: Connection refused
Mounting debugfs...Success
Sleeping for 11 seconds before sampling
Collecting data for 30 seconds
Sample interval was 00m 30s 20569us
C# | Ratio | Avg/dura | Frequency | Ratio
--------+--------+----------+-----------+--------------
C0 | 83.4% | | 600 MHz | 0.0%
C1 | 16.6% | 832.4ms | 550 MHz | 0.0%
C2 | 0.0% | | 500 MHz | 100.0%
C3 | 0.0% | | 250 MHz | 0.0%
C4 | 0.0% | | 125 MHz | 0.0%
IRQ# | Activity | Type | Name
--------+------------+----------------+---------------------------
37 | 27 | INTC | gp
11 | 23 | INTC | prcm
12 | 4 | INTC | DMA
225 | 2 | GPIO | omap2-onenand
PID# | Activity | Name | Function Entry (Expire)
--------+------------+----------------+---------------------------
0 | 16 | <kernel core> | hrtimer_start (tick_sched_timer)
93 | 5 | bdi-default | bdi_forker_task (process_timeout)
483 | 5 |flush-ubifs_0_0 | schedule_timeout_interruptible (process)
0 | 4 | <kernel core> | arm_supers_timer (sync_supers_timer_fn)
5 | 3 | events/0 | queue_delayed_work (delayed_work_timer_)
483 | 1 |flush-ubifs_0_0 | hrtimer_start_range_ns (wbuf_timer_call)
483 | 1 |flush-ubifs_0_0 | hrtimer_start_range_ns (wbuf_timer_call)
484 | 1 | powertop | hrtimer_start_range_ns (hrtimer_wakeup)
Power domain activity breakdown
Domain | % of time spent in states
--------+---------+---------+---------+---------+----------
usbhost |OFF: 0%|RET: 100%|INA: 0%| ON: 0%| now:(RET)
sgx |OFF: 100%|RET: 0%|INA: 0%| ON: 0%| now:(OFF)
per |OFF: 0%|RET: 83%|INA: 0%| ON: 16%| now:(ON)
dss |OFF: 0%|RET: 100%|INA: 0%| ON: 0%| now:(RET)
cam |OFF: 0%|RET: 100%|INA: 0%| ON: 0%| now:(RET)
core |OFF: 0%|RET: 83%|INA: 0%| ON: 16%| now:(ON)
neon |OFF: 0%|RET: 83%|INA: 0%| ON: 16%| now:(ON)
mpu |OFF: 0%|RET: 83%|INA: 0%| ON: 16%| now:(ON)
iva2 |OFF: 0%|RET: 100%|INA: 0%| ON: 0%| now:(RET)
Clock activity breakdown at end of period
Domain | Active clocks
--------+---------------+---------------+------------------
core | SDRC | OMAPCTRL | UART1
| UART2 |
core3 | USBTLL
wkup | GPT1 | 32KSYNC | GPIO1
|
ckgen | CORE | PERI | 96M
| 48M | 12M | 54M
| EMU_CORE |
per | UART3 | GPIO2 | GPIO3
| GPIO4 | GPIO5 | GPIO6
|
Total wakeups 92, 3.1/s | IRQ 56, 1.9/s | Timers 36, 1.2/s
HW wakeups 23, 0.8/s | Real gp_timers expired 27, 0.9/s
Dismounting debufs...Success
/ #
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