linux-kernel - [PATCH v7 4/8] perf jevents: Support more event fields

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Date:   Mon, 21 Aug 2023 16:36:13 +0800
From:   Jing Zhang <renyu.zj@...ux.alibaba.com>
To:     John Garry <john.g.garry@...cle.com>,
        Ian Rogers <irogers@...gle.com>
Cc:     Will Deacon <will@...nel.org>, James Clark <james.clark@....com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-doc@...r.kernel.org,
        Zhuo Song <zhuo.song@...ux.alibaba.com>,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        Shuai Xue <xueshuai@...ux.alibaba.com>
Subject: [PATCH v7 4/8] perf jevents: Support more event fields

The previous code assumes an event has either an "event=" or "config"
field at the beginning. For CMN neither of these may be present, as an
event is typically "type=xx,eventid=xxx".

If EventCode and ConfigCode is not added in the alias JSON file, the
event description will add "event=0" by default. So, even if the event
field is added "eventid=xxx" and "type=xxx", the CMN events final
parsing result will be "event=0, eventid=xxx, type=xxx".

Therefore, when EventCode and ConfigCode are missing in JSON, "event=0"
is no longer added by default. And add EventIdCode and Type to the event
field.

I compared pmu_event.c before and after compiling with JEVENT_ARCH=all,
they are consistent.

Signed-off-by: Jing Zhang <renyu.zj@...ux.alibaba.com>
---
 tools/perf/pmu-events/jevents.py | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index f57a8f2..369c8bf 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -275,11 +275,14 @@ class JsonEvent:
       }
       return table[unit] if unit in table else f'uncore_{unit.lower()}'
 
-    eventcode = 0
+    eventcode = None
     if 'EventCode' in jd:
       eventcode = int(jd['EventCode'].split(',', 1)[0], 0)
     if 'ExtSel' in jd:
-      eventcode |= int(jd['ExtSel']) << 8
+      if eventcode is None:
+        eventcode = int(jd['ExtSel']) << 8
+      else:
+        eventcode |= int(jd['ExtSel']) << 8
     configcode = int(jd['ConfigCode'], 0) if 'ConfigCode' in jd else None
     self.name = jd['EventName'].lower() if 'EventName' in jd else None
     self.topic = ''
@@ -317,7 +320,11 @@ class JsonEvent:
     if precise and self.desc and '(Precise Event)' not in self.desc:
       extra_desc += ' (Must be precise)' if precise == '2' else (' (Precise '
                                                                  'event)')
-    event = f'config={llx(configcode)}' if configcode is not None else f'event={llx(eventcode)}'
+    event = None
+    if eventcode is not None:
+      event = f'event={llx(eventcode)}'
+    elif configcode is not None:
+      event = f'config={llx(configcode)}'
     event_fields = [
         ('AnyThread', 'any='),
         ('PortMask', 'ch_mask='),
@@ -327,10 +334,15 @@ class JsonEvent:
         ('Invert', 'inv='),
         ('SampleAfterValue', 'period='),
         ('UMask', 'umask='),
+        ('NodeType', 'type='),
+        ('EventIdCode', 'eventid='),
     ]
     for key, value in event_fields:
       if key in jd and jd[key] != '0':
-        event += ',' + value + jd[key]
+        if event:
+          event += ',' + value + jd[key]
+        else:
+          event = value + jd[key]
     if filter:
       event += f',{filter}'
     if msr:
-- 
1.8.3.1