07-12-2019, 04:38 AM
RK3399 is 2xA72 + 4xA53. Can I use all six cores simultaneously or is it either 2xA72 or 4xA53 at a time? E.g. can I encode with ffmpeg utilizing all six cores?
Quote:ARM big.LITTLE is a heterogeneous computing architecture developed by ARM Holdings, coupling relatively battery-saving and slower processor cores (LITTLE) with relatively more powerful and power-hungry ones (big). Typically, only one "side" or the other will be active at once, but all the cores have access to the same memory regions, so workloads can be swapped between Big and Little cores on the fly.
top - 15:30:09 up 6:50, 2 users, load average: 9.14, 6.72, 3.19
Tasks: 256 total, 1 running, 255 sleeping, 0 stopped, 0 zombie
%Cpu0 : 32.6 us, 1.0 sy, 66.1 ni, 0.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu1 : 30.7 us, 1.0 sy, 67.6 ni, 0.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu2 : 32.5 us, 0.3 sy, 66.6 ni, 0.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu3 : 28.1 us, 0.7 sy, 70.3 ni, 1.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu4 : 42.6 us, 0.7 sy, 56.4 ni, 0.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
%Cpu5 : 43.6 us, 0.3 sy, 55.1 ni, 1.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 3967380 total, 12188 free, 1188972 used, 2766220 buff/cache
KiB Swap: 1983672 total, 1983672 free, 0 used. 2663376 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
22283 rock64 20 0 1518032 677920 28648 R 594.1 17.1 133:47.28 ffmpeg
23150 rock64 20 0 8564 3364 2696 R 1.3 0.1 0:00.81 top
...
(07-17-2019, 05:58 AM)enip Wrote: [ -> ]Thanks guys! So rockpro is still superior to 4xA72 in raspi4.