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20aa39708a
linux/tools/perf/util/intel-pt-decoder
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Adrian Hunter 20aa39708a perf intel-pt: Fix premature IPC 
The code assumed a change in cycle count means accurate IPC. That is not
correct, for example when sampling both branches and instructions, or at
a FUP packet (which is not CYC-eligible) address. Fix by using an explicit
flag to indicate when IPC can be sampled.

Fixes: 5b1dc0fd1d ("perf intel-pt: Add support for samples to contain IPC ratio")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: linux-kernel@vger.kernel.org
Link: https://lore.kernel.org/r/20210205175350.23817-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2021-02-18 16:03:37 -03:00
..
Build perf intel-pt: Use shared x86 insn decoder 2019-08-31 22:27:52 -03:00
intel-pt-decoder.c perf intel-pt: Fix premature IPC 2021-02-18 16:03:37 -03:00
intel-pt-decoder.h perf intel-pt: Fix premature IPC 2021-02-18 16:03:37 -03:00
intel-pt-insn-decoder.c perf intel-pt: Use shared x86 insn decoder 2019-08-31 22:27:52 -03:00
intel-pt-insn-decoder.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
intel-pt-log.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
intel-pt-log.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
intel-pt-pkt-decoder.c perf tools: Remove unneeded semicolons 2020-04-30 10:48:32 -03:00
intel-pt-pkt-decoder.h perf intel-pt: Add new packets for PEBS via PT 2019-06-17 15:57:17 -03:00