cpuwalk.bt - Sample which CPUs are executing processes.. Uses bpftrace/eBPF.

       Brendan Gregg

       This  tool  samples CPUs at 99 Hertz, then prints a histogram showing which CPUs were active. 99 Hertz is
       used to avoid  lockstep  sampling  that  would  skew  results.  This  tool  can  help  identify  if  your
       application's workload is evenly using the CPUs, or if there is an imbalance problem.

       Since this uses BPF, only the root user can use this tool.

       Sample CPUs and print a summary on Ctrl-C:
              # cpuwalk.bt

       1st, 2nd
              The CPU is shown in the first field, after the "[". Disregard the second field.

       3rd    A column showing the number of samples for this CPU.

       4th    This is an ASCII histogram representing the count column.

       cpuwalk.bt - Sample which CPUs are executing processes.. Uses bpftrace/eBPF.

       Linux

       This should be negligible.

       CONFIG_BPF and bpftrace.

mpstat(1)

USER COMMANDS                                      2018-09-08                                      cpuwalk.bt(8)

       This is from bpftrace.

              https://github.com/bpftrace/bpftrace

       Also  look  in  the  bpftrace  distribution  for a companion _examples.txt file containing example usage,
       output, and commentary for this tool.

       Unstable - in development.

cpuwalk.bt