From: Song Liu <songliubraving@fb.com>
To: <linux-kernel@vger.kernel.org>
Cc: <kernel-team@fb.com>, <peterz@infradead.org>, <mingo@redhat.com>,
<acme@kernel.org>, <mark.rutland@arm.com>,
<alexander.shishkin@linux.intel.com>, <jolsa@redhat.com>,
<namhyung@kernel.org>, Song Liu <songliubraving@fb.com>
Subject: [RFC 0/2] Introduce perf-stat -b for BPF programs
Date: Wed, 18 Nov 2020 20:50:44 -0800 [thread overview]
Message-ID: <20201119045046.1491106-1-songliubraving@fb.com> (raw)
This set introduces perf-stat -b option to count events for BPF programs.
This is similar to bpftool-prog-profile. But perf-stat makes it much more
flexible.
Sending as RFC because I would like comments on some key design choices:
1. We are using BPF skeletons here, which is by far the easiest way to
write and ship BPF programs. However, this requires bpftool, which
makes building perf slower.
2. A Makefile is added to tools/perf/util/bpf_skel/ to build bpftool,
and BPF skeletons. This keeps main perf Makefiles simple. But we may
not like it for some reason?
Some known limitations (or work to be done):
1. Only counting events for one BPF program at a time.
2. Need extra logic in target__validate().
Song Liu (2):
perf: support build BPF skeletons with perf
perf-stat: enable counting events for BPF programs
tools/build/Makefile.feature | 3 +-
tools/perf/Makefile.config | 8 +
tools/perf/Makefile.perf | 15 +-
tools/perf/builtin-stat.c | 59 ++++-
tools/perf/util/Build | 1 +
tools/perf/util/bpf_counter.c | 215 ++++++++++++++++++
tools/perf/util/bpf_counter.h | 71 ++++++
tools/perf/util/bpf_skel/.gitignore | 3 +
tools/perf/util/bpf_skel/Makefile | 71 ++++++
.../util/bpf_skel/bpf_prog_profiler.bpf.c | 96 ++++++++
tools/perf/util/bpf_skel/dummy.bpf.c | 19 ++
tools/perf/util/evsel.c | 10 +
tools/perf/util/evsel.h | 5 +
tools/perf/util/target.h | 6 +
14 files changed, 571 insertions(+), 11 deletions(-)
create mode 100644 tools/perf/util/bpf_counter.c
create mode 100644 tools/perf/util/bpf_counter.h
create mode 100644 tools/perf/util/bpf_skel/.gitignore
create mode 100644 tools/perf/util/bpf_skel/Makefile
create mode 100644 tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
create mode 100644 tools/perf/util/bpf_skel/dummy.bpf.c
--
2.24.1
next reply other threads:[~2020-11-19 4:51 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 4:50 Song Liu [this message]
2020-11-19 4:50 ` [RFC 1/2] perf: support build BPF skeletons with perf Song Liu
2020-11-22 23:27 ` Jiri Olsa
2020-11-24 23:47 ` Song Liu
2020-11-25 16:38 ` Jiri Olsa
2020-11-22 23:32 ` Jiri Olsa
2020-11-24 23:51 ` Song Liu
2020-11-22 23:35 ` Jiri Olsa
2020-11-24 23:52 ` Song Liu
2020-11-25 16:40 ` Jiri Olsa
2020-11-24 19:51 ` Jiri Olsa
2020-11-24 23:59 ` Song Liu
2020-11-24 19:51 ` Jiri Olsa
2020-11-24 23:53 ` Song Liu
2020-11-19 4:50 ` [RFC 2/2] perf-stat: enable counting events for BPF programs Song Liu
2020-11-23 23:47 ` Jiri Olsa
2020-11-24 23:31 ` Song Liu
2020-11-25 16:42 ` Jiri Olsa
2020-11-24 19:51 ` Jiri Olsa
2020-11-24 23:43 ` Song Liu
2020-11-25 0:02 ` Song Liu
2020-11-25 16:43 ` Jiri Olsa
2020-11-19 14:52 ` [RFC 0/2] Introduce perf-stat -b " Arnaldo Carvalho de Melo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20201119045046.1491106-1-songliubraving@fb.com \
--to=songliubraving@fb.com \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=jolsa@redhat.com \
--cc=kernel-team@fb.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=namhyung@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).