[PATCH v1 0/2] perf report: Implement visual marker for macro fusion in annotate

From	Jin Yao <yao.jin@linux.intel.com>
Newsgroups	linux.kernel
Subject	[PATCH v1 0/2] perf report: Implement visual marker for macro fusion in annotate
Date	2017-06-14 05:00 +0200
Message-ID	<tS6Hf-7QQ-7@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Macro fusion merges two instructions to a single micro-op. Intel
core platform performs this hardware optimization under limited
circumstances. For example, CMP + JCC can be "fused" and executed
/retired together. While with sampling this can result in the
sample sometimes being on the JCC and sometimes on the CMP.
So for the fused instruction pair, they could be considered
together.

In general, the fused instruction pairs are:

cmp/test/add/sub/and/inc/dec + jcc.

This patch series marks the case clearly by joining the fused
instruction pair in the arrow of the jump.

For example:

       │   ┌──cmpl   $0x0,argp_program_version_hook
 81.93 │   │──je     20
       │   │  lock   cmpxchg %esi,0x38a9a4(%rip)
       │   │↓ jne    29
       │   │↓ jmp    43
 11.47 │20:└─→cmpxch %esi,0x38a999(%rip)

Jin Yao (2):
  perf report: Check for fused instruction pair
  perf report: Implement visual marker for macro fusion in annotate

 tools/perf/arch/x86/util/Build    |  1 +
 tools/perf/arch/x86/util/fused.c  | 20 ++++++++++++++++++++
 tools/perf/ui/browser.c           | 27 +++++++++++++++++++++++++++
 tools/perf/ui/browser.h           |  2 ++
 tools/perf/ui/browsers/annotate.c | 30 ++++++++++++++++++++++++++++++
 tools/perf/util/Build             |  1 +
 tools/perf/util/annotate.c        |  5 +++++
 tools/perf/util/annotate.h        |  1 +
 tools/perf/util/fused.c           | 11 +++++++++++
 tools/perf/util/fused.h           |  8 ++++++++
 10 files changed, 106 insertions(+)
 create mode 100644 tools/perf/arch/x86/util/fused.c
 create mode 100644 tools/perf/util/fused.c
 create mode 100644 tools/perf/util/fused.h

-- 
2.7.4

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[PATCH v1 0/2] perf report: Implement visual marker for macro fusion in annotate Jin Yao <yao.jin@linux.intel.com> - 2017-06-14 05:00 +0200
  Re: [PATCH v1 0/2] perf report: Implement visual marker for macro  fusion in annotate Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-06-16 18:20 +0200
  Re: [PATCH v1 0/2] perf report: Implement visual marker for macro  fusion in annotate Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-06-16 18:20 +0200

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