navarrothiago / bcc-perf-tests

Analysis of the BCC perf_poll API.

The goal is to stress the CPU by triggering the BPF program (kprobe) attached in the tcp connect (tcpconnect-test) or hook (hook) functions.

Hook Application

Term1:

taskset --cpu-list <cpu-id> ./build/hook <cpu-id> <frequency>

Term2:

sudo ./hook_uprobe -s /usr/lib/libreadline.so --pid $(pgrep hook) --exepath /work/mantisnet/bcc-perf-buffer-poll-benchmark/build/hook

TCP Connect

Steps

Make sure you have followed the BCC installation guide.

Run the nginx:

docker run -d nginx

And just run the benchmark:

./run.sh 10 10

arg1: the total of iterations. Each iteraction executes 500 curl. arg2: upper bound of wakeup_event. Starts with 1 and increase 10 for each interaction.

In the end, the program generates a report for each execution. The report will be located in the reports folder.

Manually

You can also execute manually the test with you want to have more control.

Term1:

sudo ./tcpconnect-test -w 1

w: wakeup_events of the perf_event_attr API - https://man7.org/linux/man-pages/man2/perf_event_open.2.html.

Term2:

htop

Term3:

./test.sh 1 100

In this case, arg1 is the target cpu and 100 is the total of iterations. Each iteraction execute 500 curl. This test.sh is based on weaveworks/scope#2650 (comment)

After the execution, press Ctrl + C