kernel/tools/perf/util/intel-pt-decoder/intel-pt-decoder.h, branch linux-4.3.y

perf tools: Add Intel PT support for decoding MTC packets

2015-08-24T20:46:56Z

MTC packets provide finer grain timestamp information than TSC packets. MTC packets record time using the hardware crystal clock (CTC) which is related to TSC packets using a TMA packet. This patch just adds decoder support. Support for a default value and validation of values is provided by a later patch. Also documentation is updated in a separate patch. For details refer to the June 2015 or later Intel 64 and IA-32 Architectures SDM Chapter 36 Intel Processor Trace. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1437150840-31811-21-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Pass Intel PT information for decoding MTC and CYC

2015-08-24T20:46:43Z

Record additional information in the AUXTRACE_INFO event in preparation for decoding MTC and CYC packets. Pass the information to the decoder. The AUXTRACE_INFO record can be extended by using the size to indicate the presence of new members. The additional information includes PMU config bit positions and the TSC to CTC (hardware crystal clock) ratio needed to decode MTC packets. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1437150840-31811-20-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix Intel PT 'instructions' sample period

2015-08-24T20:42:26Z

The period on synthesized 'instructions' samples was being set to a fixed value, whereas the correct value is the number of instructions since the last sample, which is a value that the decoder can provide. So do it that way. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1437150840-31811-14-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add Intel PT decoder

2015-08-17T14:11:36Z

Add support for decoding an Intel Processor Trace. Intel PT trace data must be 'decoded' which involves walking the object code and matching the trace data packets. The decoder requests a buffer of binary data via a get_trace() call-back, which it decodes using instruction information which it gets via another call-back walk_insn(). Signed-off-by: Adrian Hunter Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1437150840-31811-6-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo