Hi Mathieu, On Fri, Dec 15, 2017 at 09:44:49AM -0700, Mathieu Poirier wrote: > This patchset adds support for per-thread CoreSight trace decoding from the > "perf report" interface. It is largely modelled on what has been done for > intelPT traces and currently targets the ETMv4 architecture. Support for > cpu-wide scenarios and ETMv3/PTMv1.1 will follow shortly. > > The trace decoding support is done using the Open CoreSight Decoding > Library (openCSD), a stand alone open source project available here [1]. > Integration of the openCSD library with the perf tools follow what has > been done for other support libraries. If the library has been installed > on a system the build scripts will include support for CoreSight trace > decoding: > > ... zlib: [ on ] > ... lzma: [ OFF ] > ... get_cpuid: [ on ] > ... bpf: [ on ] > ... libopencsd: [ on ] <------ > > Instructions on how to build and install the openCSD library are provided > in the HOWTO.md of the project repository. We elected to keep the decoder > library independent of the kernel tree as it is also used outside of the > perf toolset and various non-linux projects. > > The work applies cleanly to [2] and proper functionning of the feature > depends on this patch [3].
With latest perf code, it reports another error when analyse perf data: "0x3e0 [0x50]: failed to process type: 1". After roughly analysis, I found this is caused by one dummy event (in the binary from offset 0xf8 to offset 0x178). Because this event type is not set for 'PERF_SAMPLE_TIME', so the function perf_evsel__parse_sample_timestamp() checks the event has not set 'PERF_SAMPLE_TIME' then directly bail out with error. 000000f0: 0800 0000 0000 0000 0100 0000 7000 0000 ............p... 00000100: 0900 0000 0000 0000 0100 0000 0000 0000 ................ 00000110: 0300 0100 0000 0000 0400 0000 0000 0000 ................ 00000120: 6133 8401 0000 0000 0000 0000 0000 0000 a3.............. 00000130: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000140: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000150: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000160: 0000 0000 0000 0000 7000 0000 0000 0000 ........p....... 00000170: 0800 0000 0000 0000 4600 0000 0000 6802 ........F.....h. You could check the perf binary from [1]. Please note, this perf data I capatured from kernel 4.14-rc6, so is it might be compatible issue between 4.14-rc6 and 4.15? [1] http://people.linaro.org/~leo.yan/binaries/perf_4.15_r4/perf.data Thanks, Leo Yan > Review and comments would be greatly appreciated. > > Regards, > Mathieu > > [1]. https://github.com/Linaro/OpenCSD > [2]. git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf/core > [3]. https://lkml.org/lkml/2017/12/14/612 > > Mathieu Poirier (8): > perf tools: Integrating the CoreSight decoding library > perf tools: Add initial entry point for decoder CoreSight traces > perf tools: Add decoder mechanic to support dumping trace data > perf tools: Add support for decoding CoreSight trace data > perf tools: Add functionality to communicate with the openCSD decoder > pert tools: Add queue management functionality > perf tools: Add full support for CoreSight trace decoding > perf tools: Add mechanic to synthesise CoreSight trace packets > > Tor Jeremiassen (2): > perf tools: Add processing of coresight metadata > MAINTAINERS: Adding entry for CoreSight trace decoding > > MAINTAINERS | 3 +- > tools/build/Makefile.feature | 6 +- > tools/build/feature/Makefile | 6 +- > tools/build/feature/test-all.c | 5 + > tools/build/feature/test-libopencsd.c | 8 + > tools/perf/Makefile.config | 13 + > tools/perf/util/Build | 6 + > tools/perf/util/auxtrace.c | 2 + > tools/perf/util/cs-etm-decoder/Build | 1 + > tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 513 ++++++++++++ > tools/perf/util/cs-etm-decoder/cs-etm-decoder.h | 105 +++ > tools/perf/util/cs-etm.c | 1023 > +++++++++++++++++++++++ > tools/perf/util/cs-etm.h | 18 + > 13 files changed, 1705 insertions(+), 4 deletions(-) > create mode 100644 tools/build/feature/test-libopencsd.c > create mode 100644 tools/perf/util/cs-etm-decoder/Build > create mode 100644 tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > create mode 100644 tools/perf/util/cs-etm-decoder/cs-etm-decoder.h > create mode 100644 tools/perf/util/cs-etm.c > > -- > 2.7.4 >
