Hi,
I am using I am using the pm-20081106 on omap3evm.
I am trying to test if various pwr domains are set to OFF State.
Basically i want to test if various power domains (mpu/core) are being
set to different states
i see that core/mpu domain does not enter OFF/RET state.
$ /debug/pm_debug # cat count
usbhost_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:1
sgx_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:1
per_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1
dss_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:1
cam_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:1
core_pwrdm (ON),OFF:0,RET:0,INA:0,ON:1
neon_pwrdm (ON),OFF:0,RET:0,INA:7646,ON:7647
mpu_pwrdm (ON),OFF:0,RET:0,INA:7646,ON:7647
iva2_pwrdm (OFF),OFF:1,RET:1,INA:0,ON:1
I notice that with pm support enable. The entire system is somewhat slow.
uart responses are very slow. has anyone observed this before?
Are these states depended on clocks on/off? ie if i put the states
to OFF/RET should i take care of the clocks too?
On running powertop, I see states upto C4 only.
i can see changes across C0, C2, C4 states.
PowerTOP version 1.9 (C) 2007 Intel Corporation
Cn Avg residency P-states (frequencies)
C0 (cpu running) ( 0.2%)
C1 0.0ms ( 0.0%)
C2 4.8ms ( 0.3%)
C3 7.3ms ( 0.5%)
C4 0.0ms ( 0.0%)
Wakeups-from-idle per second : 3.0 interval: 3.0s
I tried to set sysfs entry enable_off_mode = 1, I can see that some
of the domains
are set to OFF mode through debug print. But not core/mpu domains.
Is there any reason why off mode can be set manually and not
through cpu idle?
has anyone tried this with pm-20081106.
Are there any utilities/methods to test cpu idle/pm in general other than
analyzing these debug prints.
am looking at power tester.
Regards,
sriram
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