Messages in this thread | | | Date | Mon, 7 Oct 2019 14:55:24 +0200 | From | Jiri Olsa <> | Subject | Re: [PATCH 0/5] perf record: Put a copy of kcore into the perf.data directory |
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On Fri, Oct 04, 2019 at 11:31:16AM +0300, Adrian Hunter wrote: > Hi > > Here are patches to add a new 'perf record' option '--kcore' which will put > a copy of /proc/kcore, kallsyms and modules into a perf.data directory. > Note, that without the --kcore option, output goes to a file as previously. > The tools' -o and -i options work with either a file name or directory > name. > > Example: > > $ sudo perf record --kcore uname > > $ sudo tree perf.data > perf.data > ├── kcore_dir > │ ├── kallsyms > │ ├── kcore > │ └── modules > └── data > > $ sudo perf script -v > build id event received for vmlinux: 1eaa285996affce2d74d8e66dcea09a80c9941de > build id event received for [vdso]: 8bbaf5dc62a9b644b4d4e4539737e104e4a84541 > Samples for 'cycles' event do not have CPU attribute set. Skipping 'cpu' field. > Using CPUID GenuineIntel-6-8E-A > Using perf.data/kcore_dir/kcore for kernel data > Using perf.data/kcore_dir/kallsyms for symbols > perf 19058 506778.423729: 1 cycles: ffffffffa2caa548 native_write_msr+0x8 (vmlinux) > perf 19058 506778.423733: 1 cycles: ffffffffa2caa548 native_write_msr+0x8 (vmlinux) > perf 19058 506778.423734: 7 cycles: ffffffffa2caa548 native_write_msr+0x8 (vmlinux) > perf 19058 506778.423736: 117 cycles: ffffffffa2caa54a native_write_msr+0xa (vmlinux) > perf 19058 506778.423738: 2092 cycles: ffffffffa2c9b7b0 native_apic_msr_write+0x0 (vmlinux) > perf 19058 506778.423740: 37380 cycles: ffffffffa2f121d0 perf_event_addr_filters_exec+0x0 (vmlinux) > uname 19058 506778.423751: 582673 cycles: ffffffffa303a407 propagate_protected_usage+0x147 (vmlinux) > uname 19058 506778.423892: 2241841 cycles: ffffffffa2cae0c9 unwind_next_frame.part.5+0x79 (vmlinux) > uname 19058 506778.424430: 2457397 cycles: ffffffffa3019232 check_memory_region+0x52 (vmlinux) > > > Adrian Hunter (5): > perf data: Correctly identify directory data files > perf data: Move perf_dir_version into data.h > perf data: Rename directory "header" file to "data" > perf tools: Support single perf.data file directory > perf record: Put a copy of kcore into the perf.data directory
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
thanks, jirka
> > tools/perf/Documentation/perf-record.txt | 3 ++ > .../Documentation/perf.data-directory-format.txt | 63 ++++++++++++++++++++++ > tools/perf/builtin-record.c | 54 ++++++++++++++++++- > tools/perf/util/data.c | 46 ++++++++++++++-- > tools/perf/util/data.h | 12 +++++ > tools/perf/util/header.h | 4 -- > tools/perf/util/record.h | 1 + > tools/perf/util/session.c | 4 ++ > tools/perf/util/util.c | 19 ++++++- > 9 files changed, 197 insertions(+), 9 deletions(-) > create mode 100644 tools/perf/Documentation/perf.data-directory-format.txt > > > Regards > Adrian
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