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Subject[PATCHES/RFC 1/5] perf bench uprobe + BPF skel
Date
Hi,

This adds a 'perf bench' to test the overhead of uprobes + BPF
programs, for now just a few simple tests, but I plan to make it
possible to specify the functions to attach the uprobe + BPF, other BPF
operations dealing with maps, etc.

This is how it looks like now:

[root@five ~]# perf bench uprobe all
# Running uprobe/baseline benchmark...
# Executed 1,000 usleep(1000) calls
Total time: 1,053,963 usecs

1,053.963 usecs/op

# Running uprobe/empty benchmark...
# Executed 1,000 usleep(1000) calls
Total time: 1,056,293 usecs +2,330 to baseline

1,056.293 usecs/op 2.330 usecs/op to baseline

# Running uprobe/trace_printk benchmark...
# Executed 1,000 usleep(1000) calls
Total time: 1,056,977 usecs +3,014 to baseline +684 to previous

1,056.977 usecs/op 3.014 usecs/op to baseline 0.684 usecs/op to previous

[root@five ~]

I put it here:

https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/commit/?h=perf-bench-uprobe

git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf-bench-uprobe

Further ideas, problems?

- Arnaldo



Arnaldo Carvalho de Melo (5):
perf bench uprobe: Add benchmark to test uprobe overhead
perf bench uprobe: Print diff to baseline
perf bench uprobe: Show diff to previous
perf bench uprobe empty: Add entry attaching an empty BPF program
perf bench uprobe trace_printk: Add entry attaching an BPF program that does a trace_printk

tools/perf/Documentation/perf-bench.txt | 3 +
tools/perf/Makefile.perf | 1 +
tools/perf/bench/Build | 1 +
tools/perf/bench/bench.h | 3 +
tools/perf/bench/uprobe.c | 198 ++++++++++++++++++++
tools/perf/builtin-bench.c | 8 +
tools/perf/util/bpf_skel/bench_uprobe.bpf.c | 23 +++
7 files changed, 237 insertions(+)
create mode 100644 tools/perf/bench/uprobe.c
create mode 100644 tools/perf/util/bpf_skel/bench_uprobe.bpf.c

--
2.41.0

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