[PATCH 0/4] perf c2c: Detect shared memory cachelines

[Michael Petlan <mpetlan@redhat.com>]

Hello.

Currently, perf-c2c tool has no means to discover a scenario when
there is a single cacheline in shared memory, which is mapped to
multiple different virtual addresses.

This patchset adds a mechanism to detect this. First, an "S" flag
suggests that such scenario may occur (a cacheline in shared memory
is captured). Additinally, another option is added (--detect-shm),
which zooms to the SHM cacheline and shows the physical addresses too.

Jiri Olsa has drafted this feature some time ago. I have rebased it
to current kernel repository shape and reworked several things in it
after some discussions with Joe Mario.

Thanks for thoughts and comments.

Michael


Michael Petlan (4):
  perf tools: Remove /SYSV from no_dso maps
  perf c2c: Add shared mem flag
  perf c2c: Add map name for cacheline
  perf c2c report: Add --detect-shm option

 tools/perf/builtin-c2c.c    | 178 +++++++++++++++++++++++++++++-------
 tools/perf/builtin-inject.c |   4 +-
 tools/perf/util/map.c       |   5 +-
 tools/perf/util/map.h       |   6 +-
 4 files changed, 154 insertions(+), 39 deletions(-)

-- 
2.47.3