Messages in this thread | | | From | Adrian Hunter <> | Subject | [PATCH V2 0/6] perf intel-pt: Support itrace option flag d+e to log on error | Date | Mon, 5 Sep 2022 10:34:18 +0300 |
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Hi
Here are a few patches to add the ability to output the decoding debug log only when there are decoding errors.
This is motivated by the fact that a full log can be very large, so just getting interesting bits is useful for analyzing errors.
If necessary, the size of output on error is configurable via perf config, and perf_config_scan() was added in the 1st patch to make that simpler.
The 2nd patch adds the new option flag to auxtrace.
There are a couple of very minor and essentially unrelated changes in patches 3 and 4.
The main Intel PT change is in patch 5 and there is a small example in the commit message.
Changes in V2:
perf intel-pt: Support itrace option flag d+e to log on error Ensure log_buf is defined before use
perf intel-pt: Remove first line of log dumped on error Remove first line only if the buffer has wrapped
Adrian Hunter (6): perf tools: Add perf_config_scan() perf auxtrace: Add itrace option flag d+e to log on error perf intel-pt: Improve man page layout slightly perf intel-pt: Improve object code read error message perf intel-pt: Support itrace option flag d+e to log on error perf intel-pt: Remove first line of log dumped on error
tools/perf/Documentation/itrace.txt | 1 + tools/perf/Documentation/perf-config.txt | 7 ++ tools/perf/Documentation/perf-intel-pt.txt | 13 ++- tools/perf/util/auxtrace.c | 13 +++ tools/perf/util/auxtrace.h | 3 + tools/perf/util/config.c | 31 +++++++ tools/perf/util/config.h | 1 + tools/perf/util/intel-pt-decoder/intel-pt-log.c | 117 +++++++++++++++++++++++- tools/perf/util/intel-pt-decoder/intel-pt-log.h | 3 +- tools/perf/util/intel-pt.c | 23 ++++- 10 files changed, 206 insertions(+), 6 deletions(-)
Regards Adrian
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