Initial implementation of trace-cmd perf subcommand. It collects call traces
of a given PID and resolves collected addresses to function names. Still
work in progress.
What it has till now:
- Configures and runs perf to collect call traces of the given PID.
- Runs per CPU thread to read perf buffers and store traces in temp files.
- Resolves collected addresses to function names (well, at least tries to do
it). This includes also dynamic libraries, loaded runtime during the
trace.
What should be implemented:
- Store the results in a trace.dat file. Should think about how to extend
its format to hold these traces.
- Visualise the call stack from trace.dat file with trace-cmd report and
KernelShark.
Tzvetomir Stoyanov (VMware) (5):
trace-cmd: Internal refactoring of pid address map logic
trace-cmd: Make read_file_string() non static
trace-cmd: New internal APIs for reading ELF header
trace-cmd: Add a new option in trace.dat file for the address to
function name mapping
[WIP] trace-cmd: Add new subcomand "trace-cmd perf"
Makefile | 10 +
.../include/private/trace-cmd-private.h | 5 +
lib/trace-cmd/trace-input.c | 144 +++
tracecmd/Makefile | 2 +
tracecmd/include/trace-local.h | 46 +-
tracecmd/trace-cmd.c | 1 +
tracecmd/trace-dump.c | 9 +-
tracecmd/trace-obj-debug.c | 907 ++++++++++++++++++
tracecmd/trace-perf.c | 726 ++++++++++++++
tracecmd/trace-record.c | 107 +--
10 files changed, 1841 insertions(+), 116 deletions(-)
create mode 100644 tracecmd/trace-obj-debug.c
create mode 100644 tracecmd/trace-perf.c
--
2.28.0
|