Changes v2 to v3:
1. Remove unnecessary include in header files;
2. Improved error handling;
3. Better naming of functions, variables, etc.;
4. Enable bpf events by default for perf-top.
Changes v1 to v2:
1. Fix compilation error with different feature-disassembler-four-args;
2. Fix a segfault in perf-record;
3. Split patches 5/9 and 6/9 so that perf_env changes and perf.data changes
are in separate patches.
This series enables annotation of BPF programs in perf.
perf tool gathers information via sys_bpf and (optionally) stores them in
perf.data as headers.
Patch 1/11 fixes a minor issue in kernel;
Patch 2/11 to 4/11 introduce new helper functions and use them in perf and
bpftool;
Patch 5/11 to 8/11 saves information of bpf program in perf_env;
Patch 9/11 adds --bpf-event options to perf-top;
Patch 10/11 enables annotation of bpf programs based on information
gathered in 5/11 to 8/11;
Patch 11/11 handles information of short living BPF program that are loaded
during perf-record or perf-top.
Commands tested during developments are perf-top, perf-record, perf-report,
and perf-annotate.
===================== Note on patch dependency ========================
This set has dependency in both bpf-next tree and tip/perf/core. Current
version is developed on bpf-next tree with the following commits
cherry-picked from tip/perf/core:
(from 1/10 to 10/10)
commit 76193a94522f ("perf, bpf: Introduce PERF_RECORD_KSYMBOL")
commit d764ac646491 ("tools headers uapi: Sync
tools/include/uapi/linux/perf_event.h")
commit 6ee52e2a3fe4 ("perf, bpf: Introduce PERF_RECORD_BPF_EVENT")
commit df063c83aa2c ("tools headers uapi: Sync
tools/include/uapi/linux/perf_event.h")
commit 9aa0bfa370b2 ("perf tools: Handle PERF_RECORD_KSYMBOL")
commit 45178a928a4b ("perf tools: Handle PERF_RECORD_BPF_EVENT")
commit 7b612e291a5a ("perf tools: Synthesize PERF_RECORD_* for loaded BPF
programs")
commit a40b95bcd30c ("perf top: Synthesize BPF events for pre-existing loaded
BPF programs")
commit 6934058d9fb6 ("bpf: Add module name [bpf] to ksymbols for bpf programs")
commit 811184fb6977 ("perf bpf: Fix synthesized PERF_RECORD_KSYMBOL/BPF_EVENT")
========================================================================
This set is also available at:
https://github.com/liu-song-6/linux/tree/bpf-annotation
Thanks!!
Song Liu (11):
perf, bpf: consider events with attr.bpf_event as side-band events
bpf: libbpf: introduce bpf_program__get_prog_info_linear()
bpf: bpftool: use bpf_program__get_prog_info_linear() in
prog.c:do_dump()
perf, bpf: synthesize bpf events with
bpf_program__get_prog_info_linear()
perf, bpf: save bpf_prog_info in a rbtree in perf_env
perf, bpf: save bpf_prog_info information as headers to perf.data
perf, bpf: save btf in a rbtree in perf_env
perf, bpf: save btf information as headers to perf.data
perf-top: add option --no-bpf-event
perf, bpf: enable annotation of bpf program
perf, bpf: save information about short living bpf programs
kernel/events/core.c | 3 +-
tools/bpf/bpftool/prog.c | 266 ++++++--------------------
tools/lib/bpf/libbpf.c | 251 +++++++++++++++++++++++++
tools/lib/bpf/libbpf.h | 63 +++++++
tools/lib/bpf/libbpf.map | 3 +
tools/perf/Makefile.config | 6 +-
tools/perf/builtin-record.c | 15 +-
tools/perf/builtin-top.c | 18 +-
tools/perf/util/annotate.c | 149 ++++++++++++++-
tools/perf/util/bpf-event.c | 364 ++++++++++++++++++++++++++++--------
tools/perf/util/bpf-event.h | 44 ++++-
tools/perf/util/dso.c | 1 +
tools/perf/util/dso.h | 33 ++--
tools/perf/util/env.c | 150 +++++++++++++++
tools/perf/util/env.h | 21 +++
tools/perf/util/evlist.c | 20 ++
tools/perf/util/evlist.h | 2 +
tools/perf/util/header.c | 233 ++++++++++++++++++++++-
tools/perf/util/header.h | 2 +
tools/perf/util/symbol.c | 1 +
tools/perf/util/top.h | 1 +
21 files changed, 1337 insertions(+), 309 deletions(-)
--
2.17.1
