On Thu, Feb 24, 2022 at 6:53 PM Ian Rogers <irogers@xxxxxxxxxx> wrote: > > On Thu, Feb 24, 2022 at 8:37 AM Tzvetomir Stoyanov (VMware) > <tz.stoyanov@xxxxxxxxx> wrote: > > > > Two major functionalities are introduced by this patch set: > > - VMA <-> function name resolving, using bfd library. > > Just wanted to point out that perf is often not built against libbfd: > Please build perf against libbfd - > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911815 > > where long running addr2line is now the best performance solution: > https://lore.kernel.org/linux-perf-users/20210909112202.1947499-1-tonyg@xxxxxxxxxxxxxxxxxxx/ > > The comment from the bug: > perf can link against libbfd if available, but the result is > undistributable as they are licenced under GPL v2 and v3+ > respectively. > Hi Ian, thank you for this note. Trace-cruncher is a library licensed under LGPLv2.1, so it should not be a problem to use libbfd. Is my understanding correct, as I'm not an expert in all these licences ? > Thanks, > Ian > > > - Support for Linux kernel perf framework, using perf library. > > > > This is still a work in progress. Depends on this patch, not yet merged: > > https://lore.kernel.org/linux-perf-users/20220221102628.43904-1-tz.stoyanov@xxxxxxxxx/ > > > > Tzvetomir Stoyanov (VMware) (3): > > trace-cruncher: Logic for resolving address to function name > > trace-cruncher: Support for perf > > trace-cruncher: perf example > > > > examples/perf_sampling.py | 51 +++ > > setup.py | 9 +- > > src/perfpy-utils.c | 699 ++++++++++++++++++++++++++++++ > > src/perfpy-utils.h | 41 ++ > > src/perfpy.c | 141 ++++++ > > src/trace-obj-debug.c | 873 ++++++++++++++++++++++++++++++++++++++ > > src/trace-obj-debug.h | 52 +++ > > 7 files changed, 1865 insertions(+), 1 deletion(-) > > create mode 100755 examples/perf_sampling.py > > create mode 100644 src/perfpy-utils.c > > create mode 100644 src/perfpy-utils.h > > create mode 100644 src/perfpy.c > > create mode 100644 src/trace-obj-debug.c > > create mode 100644 src/trace-obj-debug.h > > > > -- > > 2.34.1 > > -- Tzvetomir (Ceco) Stoyanov VMware Open Source Technology Center
|