perf jevents: Sort JSON files entries

Sort the JSON files entries on conversion to C. The sort order tries to
replicated cmp_sevent from pmu.c so that the input there is already
sorted except for sysfs events. Specifically, the sort order is given by
the tuple:

(not j.desc is None, fix_none(j.topic), fix_none(j.name), fix_none(j.pmu), fix_none(j.metric_name))

which is putting events with descriptions and topics before those
without, then sorting by name, then pmu and finally metric_name

Add the topic to JsonEvent on reading to simplify. Remove an unnecessary
lambda in the JSON reading.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20220812230949.683239-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2022-08-12 16:09:39 -07:00 committed by Arnaldo Carvalho de Melo
parent ee2ce6fdc8
commit 7b2f844c43

View File

@ -18,6 +18,8 @@ _sys_event_tables = []
_arch_std_events = {}
# Track whether an events table is currently being defined and needs closing.
_close_table = False
# Events to write out when the table is closed
_pending_events = []
def removesuffix(s: str, suffix: str) -> str:
@ -128,6 +130,7 @@ class JsonEvent:
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 = ''
self.compat = jd.get('Compat')
self.desc = fixdesc(jd.get('BriefDescription'))
self.long_desc = fixdesc(jd.get('PublicDescription'))
@ -200,7 +203,7 @@ class JsonEvent:
s += f'\t{attr} = {value},\n'
return s + '}'
def to_c_string(self, topic_local: str) -> str:
def to_c_string(self) -> str:
"""Representation of the event as a C struct initializer."""
def attr_string(attr: str, value: str) -> str:
@ -212,25 +215,27 @@ class JsonEvent:
return attr_string(attr, getattr(self, attr))
s = '{\n'
s += f'\t.topic = "{topic_local}",\n'
for attr in [
'aggr_mode', 'compat', 'deprecated', 'desc', 'event', 'long_desc',
'metric_constraint', 'metric_expr', 'metric_group', 'metric_name',
'name', 'perpkg', 'pmu', 'unit'
'name', 'perpkg', 'pmu', 'topic', 'unit'
]:
s += str_if_present(self, attr)
s += '},\n'
return s
def read_json_events(path: str) -> Sequence[JsonEvent]:
def read_json_events(path: str, topic: str) -> Sequence[JsonEvent]:
"""Read json events from the specified file."""
try:
return json.load(open(path), object_hook=lambda d: JsonEvent(d))
result = json.load(open(path), object_hook=JsonEvent)
except BaseException as err:
print(f"Exception processing {path}")
raise
for event in result:
event.topic = topic
return result
def preprocess_arch_std_files(archpath: str) -> None:
@ -238,7 +243,7 @@ def preprocess_arch_std_files(archpath: str) -> None:
global _arch_std_events
for item in os.scandir(archpath):
if item.is_file() and item.name.endswith('.json'):
for event in read_json_events(item.path):
for event in read_json_events(item.path, topic=''):
if event.name:
_arch_std_events[event.name.lower()] = event
@ -252,19 +257,36 @@ def print_events_table_prefix(tblname: str) -> None:
_close_table = True
def print_events_table_entries(item: os.DirEntry, topic: str) -> None:
"""Create contents of an events table."""
def add_events_table_entries(item: os.DirEntry, topic: str) -> None:
"""Add contents of file to _pending_events table."""
if not _close_table:
raise IOError('Table entries missing prefix')
for event in read_json_events(item.path):
_args.output_file.write(event.to_c_string(topic))
for e in read_json_events(item.path, topic):
_pending_events.append(e)
def print_events_table_suffix() -> None:
"""Optionally close events table."""
def event_cmp_key(j: JsonEvent):
def fix_none(s: str):
if s is None:
return ''
return s
return (not j.desc is None, fix_none(j.topic), fix_none(j.name), fix_none(j.pmu),
fix_none(j.metric_name))
global _close_table
if _close_table:
_args.output_file.write("""{
if not _close_table:
return
global _pending_events
for event in sorted(_pending_events, key=event_cmp_key):
_args.output_file.write(event.to_c_string())
_pending_events = []
_args.output_file.write("""{
\t.name = 0,
\t.event = 0,
\t.desc = 0,
@ -307,7 +329,7 @@ def process_one_file(parents: Sequence[str], item: os.DirEntry) -> None:
if not item.is_file() or not item.name.endswith('.json'):
return
print_events_table_entries(item, get_topic(item.name))
add_events_table_entries(item, get_topic(item.name))
def print_mapping_table(archs: Sequence[str]) -> None: