fork_many.sh

#!/bin/bash
podman ps
podman inspect $(podman ps -q) |grep EXPERIMENTAL_BPF_SAMPLE_RATE

cpu_intensive_task() {
  local n=3000 
  local a=101
  local b=303
  local product=0
  for (( k=0; k<n; k++ ))
  do
    product=$((a * b))
    a=$b
    b=$product
  done
}
sysctl -w kernel.bpf_stats_enabled=0
sysctl -w kernel.bpf_stats_enabled=1

total=0
count=0
for (( i=1; i<=10; i++ ))
do
  echo "Iteration $i"
  
  for (( j=1; j<=100; j++ ))
  do
    (
        cpu_intensive_task
    ) &
  done
  
  wait
  latency=$(bpftool prog show |grep -w -E "kepler_sched_switch_trace|kprobe__finish_task_switch" | awk '{print $(NF-2)/$NF}')
  total=$(echo $total + $latency | bc)
  count=$(echo $count + 1 | bc)
done

echo "Completed" $count "iterations. Average Latency is" $(echo $total / $count | bc)