Difference between revisions of "Jetson/AGX Xavier Performance Governor"

From eLinux.org
Jump to: navigation, search
(Enable performance governor for GPU)
Line 28: Line 28:
 
With performance governor enabled, GPU should run at highest frequency by default, run below command on board as root to check GPU frequency
 
With performance governor enabled, GPU should run at highest frequency by default, run below command on board as root to check GPU frequency
 
   # /home/nvidia/tegrastats
 
   # /home/nvidia/tegrastats
 
+
<pre style="margin-left:30px; color:#B0B0B0; background-color:#111111; white-space:pre-wrap;">
 +
root@jetson-0422418042089:~# /home/nvidia/tegrastats
 +
RAM 1763/15827MB (lfb 3332x4MB) CPU [0%@1190,0%@1190,0%@1190,0%@1190,0%@1190,0%@1190,0%@1190,0%@1190] EMC_FREQ 0%@2133 GR3D_FREQ 0%@1377 APE 150 MTS fg 0% bg 0% AO@41.5C GPU@43C Tboard@42C Tdiode@44.75C AUX@41.5C CPU@43C thermal@42.6C PMIC@100C GPU 1065/1065 CPU 456/456 SOC 2435/2435 CV 0/0 VDDRQ 0/0 SYS5V 2224/2224</pre>
 
== Emulate thermal throttle ==
 
== Emulate thermal throttle ==
 
TODO
 
TODO

Revision as of 01:12, 10 October 2018

In power non-sensitive case, using performance governor can help to run GPU at highest frequency by default and still be able to be thermal throttled. jetson_clocks.sh can set GPU frequency to highest by setting minimum frequency the same as maximum frequency, but in this case, GPU frequency cannot be throttled when temperature is high.

Re-config kernel

Run below command on board to check if CONFIG_DEVFREQ_GOV_PERFORMANCE is set or not. If not, please set CONFIG_DEVFREQ_GOV_PERFORMANCE=y and update the kernel

 $ zcat /proc/config.gz | grep CONFIG_DEVFREQ_GOV_PERFORMANCE

Keep GPU alive

Run below command on board as root to keep GPU alive (not suspend)

 # echo 0 > /sys/devices/17000000.gv11b/railgate_enable

Enable performance governor for GPU

Run below command on board to check all available governors for GPU

 $ cat /sys/class/devfreq/17000000.gv11b/available_governors
nvidia@jetson-0422418042089:~$ cat /sys/class/devfreq/17000000.gv11b/available_governors
nvhost_podgov userspace performance simple_ondemand

To enable performance governor, run below command on board as root

 # echo performance > /sys/class/devfreq/17000000.gv11b/governor

Check GPU frequency

With performance governor enabled, GPU should run at highest frequency by default, run below command on board as root to check GPU frequency

 # /home/nvidia/tegrastats
root@jetson-0422418042089:~# /home/nvidia/tegrastats
RAM 1763/15827MB (lfb 3332x4MB) CPU [0%@1190,0%@1190,0%@1190,0%@1190,0%@1190,0%@1190,0%@1190,0%@1190] EMC_FREQ 0%@2133 GR3D_FREQ 0%@1377 APE 150 MTS fg 0% bg 0% AO@41.5C GPU@43C Tboard@42C Tdiode@44.75C AUX@41.5C CPU@43C thermal@42.6C PMIC@100C GPU 1065/1065 CPU 456/456 SOC 2435/2435 CV 0/0 VDDRQ 0/0 SYS5V 2224/2224

Emulate thermal throttle

TODO