Re: Raspberry Pi 3 & 3+ speed issues

[mlelstv%serpens.de@localhost (Michael van Elst)]

john%klos.com@localhost (John Klos) writes:

>dry2 of 10000000 runs:

I had to compile manually instead of using the package
to get similar numbers, the pkgsrc binary shows 75%.


>Microseconds for one run through Dhrystone:    0.3
>Dhrystones per Second:                      3436426.0


pi3 (with a 11.0rc1 image, 32bit):

Microseconds for one run through Dhrystone:    0.3 
Dhrystones per Second:                      3412969.2 



>Microseconds for one run through Dhrystone:    0.3
>Dhrystones per Second:                      3424657.5

pi3+ (with a 11.99.4 image, 32bit):

Microseconds for one run through Dhrystone:    0.3 
Dhrystones per Second:                      3968254.0 


N.B. the value in machdep.cpu comes from the firmware
that controls the clocks.

pi3:

# vcgencmd get_config sdram_freq
sdram_freq=450
# vcgencmd measure_clock arm
frequency(48)=1200000000

pi3+:

# vcgencmd get_config sdram_freq
sdram_freq=450
# vcgencmd measure_clock arm
frequency(48)=1400002000