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rootfs/fork_many.sh

Created August 2, 2024 21:31
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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)
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