NVIDIA System Monitor - Only 8 cores out of 12 are used

I’m using Jetson AGX Orin 64GB which shows in the specifications it has 12 CPU cores. However, when i’m monitoring the cpu resources in power GUI i noticed only 8 cores reach to 100% when i’m running few codes while the other 4 are always 0%. Also, system monitor shows only CPU0-7.

Which jetpack version is in use?

JetPack 5.1.1

Could you share me the dmesg and sudo tegrastats result?

This is a CPU section of the dmsg. Remapping and enabling EFI services.
[ 0.007142] smp: Bringing up secondary CPUs …
[ 0.035862] Detected PIPT I-cache on CPU1
[ 0.035902] GICv3: CPU1: found redistributor 100 region 0:0x000000000f460000
[ 0.035936] CPU1: Booted secondary processor 0x0000000100 [0x410fd421]
[ 0.064587] Detected PIPT I-cache on CPU2
[ 0.064597] GICv3: CPU2: found redistributor 200 region 0:0x000000000f480000
[ 0.064612] CPU2: Booted secondary processor 0x0000000200 [0x410fd421]
[ 0.093203] Detected PIPT I-cache on CPU3
[ 0.093213] GICv3: CPU3: found redistributor 300 region 0:0x000000000f4a0000
[ 0.093227] CPU3: Booted secondary processor 0x0000000300 [0x410fd421]
[ 0.123882] Detected PIPT I-cache on CPU4
[ 0.123906] GICv3: CPU4: found redistributor 10000 region 0:0x000000000f4c0000
[ 0.123932] CPU4: Booted secondary processor 0x0000010000 [0x410fd421]
[ 0.152586] Detected PIPT I-cache on CPU5
[ 0.152594] GICv3: CPU5: found redistributor 10100 region 0:0x000000000f4e0000
[ 0.152609] CPU5: Booted secondary processor 0x0000010100 [0x410fd421]
[ 0.181225] Detected PIPT I-cache on CPU6
[ 0.181235] GICv3: CPU6: found redistributor 10200 region 0:0x000000000f500000
[ 0.181249] CPU6: Booted secondary processor 0x0000010200 [0x410fd421]
[ 0.209871] Detected PIPT I-cache on CPU7
[ 0.209881] GICv3: CPU7: found redistributor 10300 region 0:0x000000000f520000
[ 0.209896] CPU7: Booted secondary processor 0x0000010300 [0x410fd421]
[ 0.240556] Detected PIPT I-cache on CPU8
[ 0.240580] GICv3: CPU8: found redistributor 20000 region 0:0x000000000f540000
[ 0.240608] CPU8: Booted secondary processor 0x0000020000 [0x410fd421]
[ 0.269254] Detected PIPT I-cache on CPU9
[ 0.269265] GICv3: CPU9: found redistributor 20100 region 0:0x000000000f560000
[ 0.269281] CPU9: Booted secondary processor 0x0000020100 [0x410fd421]
[ 0.298512] Detected PIPT I-cache on CPU10
[ 0.298523] GICv3: CPU10: found redistributor 20200 region 0:0x000000000f580000
[ 0.298538] CPU10: Booted secondary processor 0x0000020200 [0x410fd421]
[ 0.327764] Detected PIPT I-cache on CPU11
[ 0.327774] GICv3: CPU11: found redistributor 20300 region 0:0x000000000f5a0000
[ 0.327791] CPU11: Booted secondary processor 0x0000020300 [0x410fd421]
[ 0.327847] smp: Brought up 1 node, 12 CPUs
[ 0.327914] SMP: Total of 12 processors activated.

it reads 12 CPUs but i’m not sure why system monitor and PowerGUI only consider 8 and the other 4 as offline


Screenshot from 2023-04-27 01-30-30

Could you run sudo nvpmodel -m 0 again and see if cpu cores are all enabled or not?

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