[PATCHv3 00/19] perf metric: Add support to reuse metric

[Jiri Olsa]

hi,
this patchset is adding the support to reused metric in
another metric.

For example, to define IPC by using CPI with change like:

     {
         "BriefDescription": "Instructions Per Cycle (per Logical Processor)",
-        "MetricExpr": "INST_RETIRED.ANY / CPU_CLK_UNHALTED.THREAD",
+        "MetricExpr": "1/CPI",
         "MetricGroup": "TopDownL1",
         "MetricName": "IPC"
     },

I won't be able to find all the possible places we could
use this at, so I wonder you guys (who was asking for this)
would try it and come up with comments if there's something
missing or we could already use it at some places.

It's based on Arnaldo's tmp.perf/core.

v3 changes:
  - added some acks
  - some patches got merged
  - added missing zalloc include [John Garry]
  - added ids array outside the egroup object [Ian]
  - removed wrong m->has_constraint assignment [Ian]
  - renamed 'list' to 'metric_list' [Ian]
  - fixed group metric and added test for it [Paul A. Clarke]
  - fixed memory leak [Arnaldo]
  - using lowercase keys for metrics in hashmap, because jevents
    converts metric_expr to lowercase

Also available in here:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  perf/metric

thanks,
jirka


---
Jiri Olsa (19):
      perf metric: Fix memory leak in expr__add_id function
      perf metric: Add expr__add_id function
      perf metric: Change expr__get_id to return struct expr_id_data
      perf metric: Add expr__del_id function
      perf metric: Add macros for iterating map events
      perf metric: Add add_metric function
      perf metric: Rename __metricgroup__add_metric to __add_metric
      perf metric: Collect referenced metrics in struct metric_ref_node
      perf metric: Collect referenced metrics in struct metric_expr
      perf metric: Add referenced metrics to hash data
      perf metric: Compute referenced metrics
      perf metric: Add events for the current list
      perf metric: Add cache_miss_cycles to metric parse test
      perf metric: Add DCache_L2 to metric parse test
      perf metric: Add recursion check when processing nested metrics
      perf metric: Make compute_single function more precise
      perf metric: Add metric group test
      perf metric: Rename struct egroup to metric
      perf metric: Rename group_list to metric_list

 tools/perf/tests/parse-metric.c | 206 +++++++++++++++++++++++++++++++++++++++++++++++++----
 tools/perf/util/expr.c          | 143 ++++++++++++++++++++++++++++++++-----
 tools/perf/util/expr.h          |  30 +++++++-
 tools/perf/util/expr.y          |  16 +++--
 tools/perf/util/metricgroup.c   | 466 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------
 tools/perf/util/metricgroup.h   |   6 ++
 tools/perf/util/stat-shadow.c   |  20 ++++--
 7 files changed, 751 insertions(+), 136 deletions(-)