Raspberry Pi Forums

aa3025

It seems there was quite a bit of activity on this thread! Just wanted to put another set of results with overclocked RPi 4 - 8Gb @ 2GHz under 64-bit Ubuntu 20.0 LTS https://www.hydromag.eu/~aa3025/rpi/#ubuntu MPP mode ubuntu@ubuntu:~$ uname --all Linux ubuntu 5.4.0-1012-raspi #12-Ubuntu SMP Wed May...

aa3025

export LIBRARY_PATH=/opt/openblas/lib/:$LIBRARY_PATH
export LD_LIBRARY_PATH=/opt/openblas/lib/:$LD_LIBRARY_PATH

keep that in your ~/.bashrc

aa3025

mpich has no rank file option (that was from in my openmpi trials earlier)

so you just need to launch it

mpirun -np 4 /opt/hpl/bin/xhpl

(or whatever is the path to your xhpl)

aa3025

.. yeah, I remember similar issue when compiling hpl on Raspbian, so I did not use custom makefile, but did ./configure way instead: * compiled mpich-3.3.2 e.g. into /opt/mpich/3.3.2 as normal * removed stock openblas libs (if you installed them before): and add new mpich path to PATH, apt remove li...

aa3025

Overclocked RPi 4 8GB from 1.5 GHz to 2GHz the results of HPL benchmark are (MPP with mpich, 8GB-problem): 16.3 GFlops (about 20% increase from my previous 13.6 GFlops) [ just for a record ] ================================================================================ T/V N NB P Q Time Gflops --...

aa3025

@arif-ali : Yesssss! (following your foot-steps compiled mpich, openblas, hpl), in MPP mode 13.6 GFlops! ================================================================================ T/V N NB P Q Time Gflops -------------------------------------------------------------------------------- WR11C2R4...

aa3025

Great thanks! I still got 9 GFlops after kernel firmware upgrade to v5.4 and with stock openmpi and openblas. Will try to reproduce your compilation of mpich and openblas to see if I can get your 13 GFlops...

aa3025

OK but you ran in SMP (threaded) mode (I did in MPP mode): OMP_NUM_THREADS=4 ./hpl-2.3/bin/rpi4-mpich/xhpl Will it crash if you increase problem size and 32-bit OS can't allocate the required memory? my HPL.dat for 4 mpi workers and 8GB RAM: HPLinpack benchmark input file Innovative Computing Labora...

aa3025

So, taking the theory of raspi OS 32 bit issue out of the window Kernel: Linux pi04.arif.local 5.4.44-v7l+ #1320 SMP Wed Jun 3 16:13:10 BST 2020 armv7l GNU/Linux OS: Raspbian GNU/Linux 10 (buster) You are on rpi-5.4.y kernel. On my Pi I have the latest to be 4.19.118-v7l+ #1311 SMP Mon Apr 27 14:26...

aa3025

Decent! Is it gcc8 (stock) compiler you compiled everything with?
I don't know, may be your compiled OpenBLAS is magic! (did you try with the stock libopenblas?)

aa3025

Oh, that's nice! I wasn't able to produce working xhpl binary when compiling with stock mpich, the resulting exe segfaulting straight away...When compiled with OpenMPI and gcc10.1 it is still produces 9.07 GFlops with my big (8GB) problem size (N=28800, P=2, Q=2) With N=8000 I've got 7.8 GFlops with...

aa3025

@ejolson: Looks like your 1st run was SMP code then, and yes, your problem size was way smaller (took just 30 sec), how much memory did it use? whole 2GB? On 32bit one process could not address whole 8GB obviously, this is why I did not try in SMP. If I try to launch on one process, it will crash wi...

aa3025

yes, but if the HPL test takes 45-30 min, you can abort it earlier, if you know that throttling has already occurred. Anyway , with my "improved" case (fan) temperature did not go above 52C during the tests. @Arif: I actually checked whether changing scaling_governor to "performance" (from "ondemand...

aa3025

Yes that's how I monitored throttling state.

aa3025

Hi Arif, yes, HPL is my default test tool too for the compute nodes of HPC I'm managing at work. I kept monitoring throttling state during the test to make sure it does not scale down the frequency, kept it at about 50 C during the tests -- way below "official" 85C throttling limit. Pi CPU sits norm...

aa3025

Hi All,

got my Pi 4 8GB recently and decided to do HPL benchmark on it. Result: almost 9 GFlops !!! tutorial and results are here: https://www.hydromag.eu/~aa3025/rpi/.

Alex P.

aa3025

I had the similar issue until I removed "motion" and some other software for camera monitoring which was loading on boot (check your /etc/rc.local just in case). The error came up when the camera was "in use".

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Raspberry Pi4 8GB xHPL benchmark results

Re: Issues with Camera Module V2: (mmal: Failed to run camera app).