DuraCOR 312
Appendix B
MNL-0670-01 Rev A2
ECO-5931
Effective: 03 Jun 20
Page 45 of 59
If a system is running at high temperatures, the TX2i will shut down automatically if the TTP temperature
reaches about 105C. This limit is built into the TX2i module and can’t be changed. (See nVidia
temperature design guide available from nVidia).
We have opt’ed to not build in automatic throttling to the DuraCOR 312 because there are so many
situations where this activity needs to be under the complete control of the user. Therefore, it is up to the
user to make sure that the system does not shut down when running high temperatures.
Caution:
Running this unit at full CPU/GPU activity and at high environment temperatures of 50C and above
should be implemented with caution, using GPU/CPU throttling techniques recommended by nVidea
and Parvus technical support.
Here is a part of the code which we used to throttle between 100% and 50% GPU activity:
"cat /sys/class/thermal/thermal_zone?/temp >> /media/nvidia/SAFD/Temperature.txt"
)
;
if
(
Temperaturei0
>
75000
){
if
(
Throttling
==
0
){
"sudo jetson_clocks --restore ~/ATP/jetson_clocks_New.conf"
)
;
recordError
(
" Throttling ON "
)
;
Throttling
=
1
;
}
}
else
if
(
Temperaturei0
<
72000
){
if
(
Throttling
==
1
){
"sudo jetson_clocks --restore ~/ATP/jetson_clocks_default.conf"
)
;
recordError
(
" Throttling OFF "
)
;
Throttling
=
0
;
}
}
With corresponding .conf files for the lower throttling 50% throttled case:
50% Clock speeds…………..
/sys/devices/system/cpu/cpu0/online:1
/sys/devices/system/cpu/cpu1/online:1
/sys/devices/system/cpu/cpu2/online:1
/sys/devices/system/cpu/cpu3/online:1
/sys/devices/system/cpu/cpu4/online:1
/sys/devices/system/cpu/cpu5/online:1
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:345600
/sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq:345600
/sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq:345600
/sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq:345600
/sys/devices/system/cpu/cpu4/cpufreq/scaling_min_freq:345600
/sys/devices/system/cpu/cpu5/cpufreq/scaling_min_freq:345600
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:1420800
/sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq:1420800
/sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq:1420800
/sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq:1420800
/sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq:1420800
