[PATCH v6 00/15] perf c2c: Support data source and display for Arm64

[Leo Yan]

Arm64 Neoverse CPUs supports data source in Arm SPE trace, this allows
us to detect cache line contention and transfers.

This patch set has been rebased on the acme/perf/core branch with the latest
commit b39c9e1b101d ("perf machine: Fix missing free of
machine->kallsyms_filename").

To make building success, a compilation fixing commit [1] has been sent
to LKML, this patch set is dependent on it.  This patch set has been verified
for both x86 perf memory events and Arm SPE events.

[1] https://lore.kernel.org/lkml/20220811044341.426796-1-leo.yan@xxxxxxxxxx/

Changes from v5:
* Removed the patch "perf: Add SNOOP_PEER flag to perf mem data struct"
  (Arnaldo);
* Removed the patch "perf arm-spe: Don't set data source if it's not a
  memory operation" which has been merged in the mainline kernel, so can
  dismiss merging conflict.
* Rebased on the latest acme perf/core branch, no any code change
  compared to previous version.

Changes from v4:
* Included Ali's patch set for adding data source in Arm SPE samples;
* Added Ian's ACK and Ali's review and test tags;
* Update document for the default peer dispaly for Arm64 (Ali).

Changes from v3:
* Changed to display remote and local peer accesses (Joe);
* Fixed the usage info for display types (Joe);
* Do not display HITM dimensions when use 'peer' display, and HITM
  display doesn't show any 'peer' dimensions (James);
* Split to smaller patches for adding dimensions of peer operations;
* Updated documentation to reflect the latest GUI and stdio.


Ali Saidi (2):
  perf tools: sync addition of PERF_MEM_SNOOPX_PEER
  perf arm-spe: Use SPE data source for neoverse cores

Leo Yan (13):
  perf mem: Print snoop peer flag
  perf mem: Add statistics for peer snooping
  perf c2c: Output statistics for peer snooping
  perf c2c: Add dimensions for peer load operations
  perf c2c: Add dimensions of peer metrics for cache line view
  perf c2c: Add mean dimensions for peer operations
  perf c2c: Use explicit names for display macros
  perf c2c: Rename dimension from 'percent_hitm' to
    'percent_costly_snoop'
  perf c2c: Refactor node header
  perf c2c: Refactor display string
  perf c2c: Sort on peer snooping for load operations
  perf c2c: Use 'peer' as default display for Arm64
  perf c2c: Update documentation for new display option 'peer'

 tools/include/uapi/linux/perf_event.h         |   2 +-
 tools/perf/Documentation/perf-c2c.txt         |  31 +-
 tools/perf/builtin-c2c.c                      | 454 ++++++++++++++----
 .../util/arm-spe-decoder/arm-spe-decoder.c    |   1 +
 .../util/arm-spe-decoder/arm-spe-decoder.h    |  12 +
 tools/perf/util/arm-spe.c                     | 130 ++++-
 tools/perf/util/mem-events.c                  |  46 +-
 tools/perf/util/mem-events.h                  |   3 +
 8 files changed, 547 insertions(+), 132 deletions(-)

-- 
2.34.1