Messages in this thread | | | From | Adrian Hunter <> | Subject | [PATCH V3 0/6] perf dlfilter: Add dlfilter-show-cycles | Date | Wed, 27 Oct 2021 11:03:28 +0300 |
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Hi
The issue with V1 was that the IPC information used to accumulate cycle counts has a lower granularity because it is output only when the cycle count correlates to the IP of the event i.e. only when the IPC is exactly correct.
To enable more frequent updates to the cycle count, itrace option 'A' is added, which specifies that IPC information can be approximate.
In addition there are some new miscellaneous patches.
Changes in V3:
perf intel-pt: Support itrace A option to approximate IPC Expanded explanation of the loss of accuracy of IPC with 'A' option.
Added Reviewed-by: Andi Kleen <ak@linux.intel.com>
Changes in V2:
perf dlfilter: Add dlfilter-show-cycles Separate counts for branches, instructions or other events.
New patches: perf auxtrace: Add missing Z option to ITRACE_HELP perf auxtrace: Add itrace A option to approximate IPC perf intel-pt: Support itrace A option to approximate IPC perf auxtrace: Add itrace d+o option to direct debug log to stdout perf intel-pt: Support itrace d+o option to direct debug log to stdout
Adrian Hunter (6): perf auxtrace: Add missing Z option to ITRACE_HELP perf auxtrace: Add itrace A option to approximate IPC perf intel-pt: Support itrace A option to approximate IPC perf dlfilter: Add dlfilter-show-cycles perf auxtrace: Add itrace d+o option to direct debug log to stdout perf intel-pt: Support itrace d+o option to direct debug log to stdout
tools/perf/Documentation/itrace.txt | 2 + tools/perf/Documentation/perf-intel-pt.txt | 28 ++++ tools/perf/Makefile.perf | 2 +- tools/perf/dlfilters/dlfilter-show-cycles.c | 144 +++++++++++++++++++++ tools/perf/util/auxtrace.c | 3 + tools/perf/util/auxtrace.h | 6 + .../perf/util/intel-pt-decoder/intel-pt-decoder.c | 1 + .../perf/util/intel-pt-decoder/intel-pt-decoder.h | 1 + tools/perf/util/intel-pt-decoder/intel-pt-log.c | 8 +- tools/perf/util/intel-pt.c | 21 ++- 10 files changed, 205 insertions(+), 11 deletions(-) create mode 100644 tools/perf/dlfilters/dlfilter-show-cycles.c
Regards Adrian
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