How can I get the gpu loading at im8mq

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How can I get the gpu loading at im8mq

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harry18456
Contributor II

As title,

/unit_tests/GPU/ has gpuinfo.sh script file to show the info. of GPU

I think the idle my be the un-loading of GPU, but the value is always 0 and seem the script is wrong.(the /sys/kernel/gc/idle no $7)

Please give some advice for gpu loading.

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3 Replies

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weidong_sun
NXP TechSupport
NXP TechSupport

Hi Harry,

See below, please! following information was from i.MX Expert.

--------------------------------------------

The gpuinfo.sh , actually read  /sys/kernel/debug/gc/idle to dump some status, and customer request just related to this file.

 

The default BSP, read this file when run one gpu app like below:

cat /sys/kernel/debug/gc/idle
Start: 86195859250 ns
End: 86828538250 ns
On: 133228125 ns
Off: 0 ns
Idle: 0 ns
Suspend: 499450875 ns


Explain each filed, note the idle here is power state.

On: Time GPU stays in gcvPOWER_0N.

Off: Time GPU stays in gcvPOWER_0FF.

Idle: Time GPU stays in gcvPOWER_IDLE.

Suspend: Time GPU stays in gcvPOWER_SUSPEND.

 

Due to default bsp set gcdPOWER_SUSPEND_WHEN_IDLE  as 1 , then there is no time into IDLE state.

if you change as below:

diff --git a/drivers/mxc/gpu-viv/hal/kernel/inc/gc_hal_options.h b/drivers/mxc/gpu-viv/hal/kernel/inc/gc_hal_options.h
index 73e98a9..87ad82d 100644
--- a/drivers/mxc/gpu-viv/hal/kernel/inc/gc_hal_options.h
+++ b/drivers/mxc/gpu-viv/hal/kernel/inc/gc_hal_options.h
@@ -547,7 +547,7 @@

/*
gcdPOWER_SUSPEND_WHEN_IDLE

Set to 1 to make GPU enter gcvPOWER_SUSPEND when idle detected,
otherwise GPU will enter gcvPOWER_IDLE.
*/


#ifndef gcdPOWER_SUSPEND_WHEN_IDLE
-# define gcdPOWER_SUSPEND_WHEN_IDLE 1
+# define gcdPOWER_SUSPEND_WHEN_IDLE 0
#endif

 

Then run some gpu app , and dump that file , you can got result as below.

 

root@imx8qxpmek:~# cat /sys/kernel/debug/gc/idle
Start: 2117611559250 ns
End: 2121859363125 ns
On: 535987250 ns     
Off: 389108375 ns
Idle: 3322708250 ns
Suspend: 0 ns

 

 

 

So i think there is no problem in default BSP,  and keep gcdPOWER_SUSPEND_WHEN_IDLE  as 1.

-------------------------------------------

Have a nice day!

BR,

Weidong

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harry18456
Contributor II

Hi Wigros,

Thanks your replay!

Explain each filed, note the idle here is power state.

On: Time GPU stays in gcvPOWER_0N.

Off: Time GPU stays in gcvPOWER_0FF.

Idle: Time GPU stays in gcvPOWER_IDLE.

Suspend: Time GPU stays in gcvPOWER_SUSPEND.

   -> Is it possible stand for gpu loading with  "On / (End-Start)"

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363 Views
harry18456
Contributor II

Hi NXP,

Can help this question ?

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