Message ID | 20200309173218.2739965-1-songliubraving@fb.com |
---|---|
Headers | show |
Series | bpftool: introduce prog profile | expand |
On 3/9/20 6:32 PM, Song Liu wrote: > This set introduces bpftool prog profile command, which uses hardware > counters to profile BPF programs. > > This command attaches fentry/fexit programs to a target program. These two > programs read hardware counters before and after the target program and > calculate the difference. > > Changes v5 => v6: > 1. Use new header bpf_tracing.h (Yonghong). > > Changes v4 => v5: > 1. Adjust perf_event_attr for the events (Jiri). > > Changes v3 => v4: > 1. Simplify err handling in profile_open_perf_events() (Quentin); > 2. Remove redundant p_err() (Quentin); > 3. Replace tab with space in bash-completion; (Quentin); > 4. Fix typo _bpftool_get_map_names => _bpftool_get_prog_names (Quentin). > > Changes v2 => v3: > 1. Change order of arguments (Quentin), as: > bpftool prog profile PROG [duration DURATION] METRICs > 2. Add bash-completion for bpftool prog profile (Quentin); > 3. Fix build of selftests (Yonghong); > 4. Better handling of bpf_map_lookup_elem() returns (Yonghong); > 5. Improve clean up logic of do_profile() (Yonghong); > 6. Other smaller fixes/cleanups. > > Changes RFC => v2: > 1. Use new bpf_program__set_attach_target() API; > 2. Update output format to be perf-stat like (Alexei); > 3. Incorporate skeleton generation into Makefile; > 4. Make DURATION optional and Allow Ctrl-C (Alexei); > 5. Add calcated values "insn per cycle" and "LLC misses per million isns". > > Song Liu (4): > bpftool: introduce "prog profile" command > bpftool: Documentation for bpftool prog profile > ybpftool: bash completion for "bpftool prog profile" Applied and fixed subject typo above, thanks. Please follow-up with a feature probe to support older clang/llvm versions. > bpftool: fix typo in bash-completion