Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1689875

Re: [RFC 0/4] perf script python: Provide perf_sample dict to all handlers

Show all headers | View raw

On Mon, Jul 17, 2017 at 03:10:36PM -0700, Arun Kalyanasundaram wrote:
> The process_event python hook receives a dict with all perf_sample entries.
> 
> Other handlers (e.g. trace_unhandled, python_process_tracepoint) predate the introduction of this dict and do not receive it. This patch series adds the dict to all handlers, aiming to unify the information passed to them.
> 
> This change adds an additional argument to the affected handlers. To keep backwards compatibility (and avoid unnecessary work), do not pass the aforementioned dict if the number of arguments signals that handler version predates this change.
> 
> Initial Discussion: https://lkml.org/lkml/2017/7/1/108
> 
> Arun Kalyanasundaram (4):
>   perf script python: Allocate memory only if handler exists
>   perf script python: Refactor creation of perf sample dict
>   perf script python: Add perf_sample dict to tracepoint handlers
>   perf script python: Generate hooks with additional argument
> 
>  .../util/scripting-engines/trace-event-python.c    | 189 ++++++++++++++-------
>  1 file changed, 128 insertions(+), 61 deletions(-)

looks good, but any idea the perf-script.py output gives
some trash at the end of 'comm' args? like:

sched__sched_stat_runtime     1 199971.010182869    21999 perf                  comm=perf^@^@-x86_64-l^@, pid=21999


thanks,
jirka

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC 0/4] perf script python: Provide perf_sample dict to all handlers Arun Kalyanasundaram <arunkaly@google.com> - 2017-07-18 00:20 +0200
  [RFC 4/4] perf script python: Generate hooks with additional argument Arun Kalyanasundaram <arunkaly@google.com> - 2017-07-18 00:20 +0200
  [RFC 2/4] perf script python: Refactor creation of perf sample dict Arun Kalyanasundaram <arunkaly@google.com> - 2017-07-18 00:20 +0200
  [RFC 1/4] perf script python: Allocate memory only if handler exists Arun Kalyanasundaram <arunkaly@google.com> - 2017-07-18 00:20 +0200
  [RFC 3/4] perf script python: Add perf_sample dict to tracepoint handlers Arun Kalyanasundaram <arunkaly@google.com> - 2017-07-18 00:20 +0200
  Re: [RFC 0/4] perf script python: Provide perf_sample dict to all  handlers Jiri Olsa <jolsa@redhat.com> - 2017-07-18 10:40 +0200
    Re: [RFC 0/4] perf script python: Provide perf_sample dict to all handlers Arun Kalyanasundaram <arunkaly@google.com> - 2017-07-18 20:20 +0200

csiph-web