ODROID XU4 execution time problem between big and LITTLE cores

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phlsb
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ODROID XU4 execution time problem between big and LITTLE cores

Unread post by phlsb » Mon Nov 18, 2019 3:07 pm

There is a problem here. The same program is executed on the big core and is 3s more than the LITTLE core. It is executed at the highest frequency (LITTLE core 1.5GHz, big core 2GHz), and the impact of inter-core task migration has been ruled out. Even after shutting down all the LITTLE cores, the time of the big core program has not changed (this has ruled out the impact of LITTLE cores on the big core). Please help me.

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mad_ady
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Re: ODROID XU4 execution time problem between big and LITTLE cores

Unread post by mad_ady » Mon Nov 18, 2019 3:45 pm

Check the board temperature and check that the big cores are not thermal throttled. Also, what governor are you using?

phlsb
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Re: ODROID XU4 execution time problem between big and LITTLE cores

Unread post by phlsb » Mon Nov 18, 2019 3:52 pm

mad_ady wrote:
Mon Nov 18, 2019 3:45 pm
Check the board temperature and check that the big cores are not thermal throttled. Also, what governor are you using?
thinks, i change the governor into "userspace" to help me adjust the frenquency. let me check the temperature

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