Use of likwid-perfctr

Use of likwid-perfctr

by Sudesh Rathnayake -
Number of replies: 0

Hello everyone, 

I have used the likwid-perfctr to get some memory bandwidth measurements and the obtained results for the bandwidth have the following trend. 

I have used the command as follows in my batchs script;

Ex: for a case with 72 threads.

export OMP_NUM_THREADS=72

srun --cpu-freq=2400000-2400000:performance likwid-perfctr -C S0:0-35@S1:0-35 -g MEM -m ./a.out

Is it the reason for the following measurements, notably from the second socket? Is there an alternative way where I can use the command?

Best,

Sudesh.