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echo: rberrypi
to: THE NATURAL PHILOSOPHER
from: DELOPTES
date: 2020-12-01 19:01:00
subject: Re: rpi4 as server?

The Natural Philosopher wrote:

> $time factor 1234567890123456789012345678901
> 1234567890123456789012345678901: 7742394596501 159455563099482401
>
> real    0m0.224s
> user    0m0.220s
> sys     0m0.000s
>
> But on most CPU intensive  tasks the desktop is 4x faster than the server.
>
> Compiling on the zero did however take about 20 times as long....

there is a lot of IO involved when compiling as well.

I was wondering if someone considered the 32 vs.64bit.
Here some results on the CPUs that I have. #3 is RPI4B with 32bit. #4 is
Geode 32bit.

The test might be discriminating the 32bit by the number size to be
calculated


$ grep "model name" /proc/cpuinfo
model name      : Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz
$ time /usr/bin/factor 1234567890123456789012345678901
1234567890123456789012345678901: 7742394596501 159455563099482401

real    0m0.241s
user    0m0.237s
sys     0m0.001s

# grep "model name" /proc/cpuinfo
model name      : AMD FX(tm)-4100 Quad-Core Processor

# time /usr/bin/factor 1234567890123456789012345678901
1234567890123456789012345678901: 7742394596501 159455563099482401

real    0m0.332s
user    0m0.320s
sys     0m0.000s

# grep "model name" /proc/cpuinfo
model name      : ARMv7 Processor rev 3 (v7l)
# time factor 1234567890123456789012345678901
1234567890123456789012345678901: 7742394596501 159455563099482401

real    0m6.358s
user    0m6.321s
sys     0m0.002s

# grep "model name" /proc/cpuinfo
model name      : Geode(TM) Integrated Processor by National Semi
# time /usr/bin/factor 1234567890123456789012345678901
1234567890123456789012345678901: 7742394596501 159455563099482401

real    0m37.042s
user    0m35.503s
sys     0m1.408s

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