Feeling? These were measurements done by @balbes150 last year: Armbian for Amlogic S912 - Page 17 - General Chat - Armbian Community Forums
I only interpreted the numbers. Sysbench provides execution time and standard deviation so it’s pretty capable of reporting what’s happening.
For whatever reasons so far no one tested again with sysbench but at least it’s obvious that the cpufreq values able to set and retrieve to access ‘clockspeeds’ via sysfs at least for the big cluster are still bogus.
Based on your single threaded tests it looks like this with openssl:
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
H6 / 1.8 GHz 226657.97k 606014.83k 1013054.98k 1259576.66k 1355773.27k
S5P6818/1.6 GHz 200591.68k 538595.61k 900359.25k 1115728.97k 1204936.70k
S912 / 1416 MHz 180854.98k 481036.27k 787004.93k 985753.60k 1064241.83k
RK3328/1.3 GHz 163161.40k 436259.80k 729289.90k 906723.33k 975929.34k
A64 / 1152 MHz 144995.37k 387488.51k 648090.20k 805775.36k 867464.53k
S912 / 1000 MHz 127654.30k 339543.23k 555562.07k 695949.31k 751217.32k
AES encryption though is something special since this is done on an own special engine when ARMv8 Crypto Extensions are available as on the S912. So still curious how sysbench results look like as an example of full load directly on the CPU cores.
It’s pretty simple to let this small script run and report results:
#!/bin/bash
echo performance >/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance >/sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
for o in 1 4 8 ; do
for i in $(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies) ; do
echo $i >/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo -e "$o cores, $(( $i / 1000)) MHz: \c"
sysbench --test=cpu --cpu-max-prime=20000 run --num-threads=$o 2>&1 | grep 'execution time'
done
done
sysbench --test=cpu --cpu-max-prime=20000 run --num-threads=8 2>&1 | egrep "percentile|min:|max:|avg:"
Or using 7-zip’s benchmark mode (with 7-zip also memory performance plays an important role so it’s not an ideal tool to draw conclusions wrt count of CPU cores and actual clockspeeds. But if 7-zip performance on the big cluster is below RPi 3 numbers then there’s something seriously wrong):
sudo apt install p7zip
taskset -c 0-3 7zr b -mmt1
taskset -c 0-3 7zr b -mmt4
taskset -c 4-7 7zr b -mmt4
7zr b