@@ -23,6 +23,8 @@ _metric_tables = []
_sys_metric_tables = []
# Mapping between sys event table names and sys metric table names.
_sys_event_table_to_metric_table_mapping = {}
+# List of regular PMU counter layout tables.
+_pmu_layouts_tables = []
# Map from an event name to an architecture standard
# JsonEvent. Architecture standard events are in json files in the top
# f'{_args.starting_dir}/{_args.arch}' directory.
@@ -31,6 +33,9 @@ _arch_std_events = {}
_pending_events = []
# Name of events table to be written out
_pending_events_tblname = None
+# PMU counter layout to write out when the table is closed
+_pending_pmu_counts = [] # Name of PMU counter layout table to be written out
+_pending_pmu_counts_tblname = None
# Metrics to write out when the table is closed
_pending_metrics = []
# Name of metrics table to be written out
@@ -47,10 +52,17 @@ _json_event_attributes = [
'event',
# Short things in alphabetical order.
'compat', 'deprecated', 'perpkg', 'unit',
+ # Counter this event could use
+ 'counter',
# Longer things (the last won't be iterated over during decompress).
'long_desc'
]
+# Attributes that are in pmu_unit_layout.
+_json_layout_attributes = [
+ 'pmu', 'desc', 'size', 'fixed_size'
+]
+
# Attributes that are in pmu_metric rather than pmu_event.
_json_metric_attributes = [
'metric_name', 'metric_group', 'metric_expr', 'metric_threshold',
@@ -58,7 +70,9 @@ _json_metric_attributes = [
'default_metricgroup_name', 'aggr_mode', 'event_grouping'
]
# Attributes that are bools or enum int values, encoded as '0', '1',...
-_json_enum_attributes = ['aggr_mode', 'deprecated', 'event_grouping', 'perpkg']
+_json_enum_attributes = ['aggr_mode', 'deprecated', 'event_grouping', 'perpkg',
+ 'size', 'fixed_size'
+]
def removesuffix(s: str, suffix: str) -> str:
"""Remove the suffix from a string
@@ -317,6 +331,9 @@ class JsonEvent:
if 'Errata' in jd:
extra_desc += ' Spec update: ' + jd['Errata']
self.pmu = unit_to_pmu(jd.get('Unit'))
+ self.counter = jd.get('Counter')
+ self.size = jd.get('Size')
+ self.fixed_size = jd.get('FixedSize')
filter = jd.get('Filter')
self.unit = jd.get('ScaleUnit')
self.perpkg = jd.get('PerPkg')
@@ -388,8 +405,16 @@ class JsonEvent:
s += f'\t{attr} = {value},\n'
return s + '}'
- def build_c_string(self, metric: bool) -> str:
+ def build_c_string(self, metric: bool, layout: bool = False) -> str:
s = ''
+ if layout:
+ for attr in _json_layout_attributes:
+ x = getattr(self, attr)
+ if attr in _json_enum_attributes:
+ s += x if x else '0'
+ else:
+ s += f'{x}\\000' if x else '\\000'
+ return s
for attr in _json_metric_attributes if metric else _json_event_attributes:
x = getattr(self, attr)
if metric and x and attr == 'metric_expr':
@@ -404,10 +429,10 @@ class JsonEvent:
s += f'{x}\\000' if x else '\\000'
return s
- def to_c_string(self, metric: bool) -> str:
+ def to_c_string(self, metric: bool, layout: bool = False) -> str:
"""Representation of the event as a C struct initializer."""
- s = self.build_c_string(metric)
+ s = self.build_c_string(metric, layout)
return f'{{ { _bcs.offsets[s] } }}, /* {s} */\n'
@@ -444,6 +469,8 @@ def preprocess_arch_std_files(archpath: str) -> None:
_arch_std_events[event.name.lower()] = event
if event.metric_name:
_arch_std_events[event.metric_name.lower()] = event
+ if event.size:
+ _arch_std_events[event.pmu.lower()] = event
def add_events_table_entries(item: os.DirEntry, topic: str) -> None:
@@ -453,6 +480,8 @@ def add_events_table_entries(item: os.DirEntry, topic: str) -> None:
_pending_events.append(e)
if e.metric_name:
_pending_metrics.append(e)
+ if e.size:
+ _pending_pmu_counts.append(e)
def print_pending_events() -> None:
@@ -566,6 +595,33 @@ const struct pmu_table_entry {_pending_metrics_tblname}[] = {{
""")
_args.output_file.write('};\n\n')
+def print_pending_pmu_counts() -> None:
+
+ def pmu_counts_cmp_key(j: JsonEvent) -> Tuple[bool, str, str]:
+ def fix_none(s: Optional[str]) -> str:
+ if s is None:
+ return ''
+ return s
+
+ return (j.desc is not None, fix_none(j.pmu), fix_none(j.size))
+
+ global _pending_pmu_counts
+ if not _pending_pmu_counts:
+ return
+
+ global _pending_pmu_counts_tblname
+ global pmu_layouts_tables
+ _pmu_layouts_tables.append(_pending_pmu_counts_tblname)
+
+ _args.output_file.write(
+ f'static const struct compact_pmu_event {_pending_pmu_counts_tblname}[] = {{\n')
+
+ for pmu_layout in sorted(_pending_pmu_counts, key=pmu_counts_cmp_key):
+ _args.output_file.write(pmu_layout.to_c_string(metric=False, layout=True))
+ _pending_pmu_counts = []
+
+ _args.output_file.write('};\n\n')
+
def get_topic(topic: str) -> str:
if topic.endswith('metrics.json'):
return 'metrics'
@@ -606,6 +662,8 @@ def preprocess_one_file(parents: Sequence[str], item: os.DirEntry) -> None:
if event.metric_name:
_bcs.add(pmu_name, metric=True)
_bcs.add(event.build_c_string(metric=True), metric=True)
+ if event.size:
+ _bcs.add(event.build_c_string(metric=False, layout=True), metric=False)
def process_one_file(parents: Sequence[str], item: os.DirEntry) -> None:
"""Process a JSON file during the main walk."""
@@ -619,11 +677,14 @@ def process_one_file(parents: Sequence[str], item: os.DirEntry) -> None:
if item.is_dir() and is_leaf_dir(item.path):
print_pending_events()
print_pending_metrics()
+ print_pending_pmu_counts()
global _pending_events_tblname
_pending_events_tblname = file_name_to_table_name('pmu_events_', parents, item.name)
global _pending_metrics_tblname
_pending_metrics_tblname = file_name_to_table_name('pmu_metrics_', parents, item.name)
+ global _pending_pmu_counts_tblname
+ _pending_pmu_counts_tblname = file_name_to_table_name('pmu_layouts_', parents, item.name)
if item.name == 'sys':
_sys_event_table_to_metric_table_mapping[_pending_events_tblname] = _pending_metrics_tblname
@@ -657,6 +718,12 @@ struct pmu_metrics_table {
uint32_t num_pmus;
};
+/* Struct used to make the PMU counter layout table implementation opaque to callers. */
+struct pmu_layouts_table {
+ const struct compact_pmu_event *entries;
+ size_t length;
+};
+
/*
* Map a CPU to its table of PMU events. The CPU is identified by the
* cpuid field, which is an arch-specific identifier for the CPU.
@@ -670,6 +737,7 @@ struct pmu_events_map {
const char *cpuid;
struct pmu_events_table event_table;
struct pmu_metrics_table metric_table;
+ struct pmu_layouts_table layout_table;
};
/*
@@ -714,6 +782,12 @@ const struct pmu_events_map pmu_events_map[] = {
metric_size = '0'
if event_size == '0' and metric_size == '0':
continue
+ layout_tblname = file_name_to_table_name('pmu_layouts_', [], row[2].replace('/', '_'))
+ if layout_tblname in _pmu_layouts_tables:
+ layout_size = f'ARRAY_SIZE({layout_tblname})'
+ else:
+ layout_tblname = 'NULL'
+ layout_size = '0'
cpuid = row[0].replace('\\', '\\\\')
_args.output_file.write(f"""{{
\t.arch = "{arch}",
@@ -725,6 +799,10 @@ const struct pmu_events_map pmu_events_map[] = {
\t.metric_table = {{
\t\t.pmus = {metric_tblname},
\t\t.num_pmus = {metric_size}
+\t}},
+\t.layout_table = {{
+\t\t.entries = {layout_tblname},
+\t\t.length = {layout_size}
\t}}
}},
""")
@@ -735,6 +813,7 @@ const struct pmu_events_map pmu_events_map[] = {
\t.cpuid = 0,
\t.event_table = { 0, 0 },
\t.metric_table = { 0, 0 },
+\t.layout_table = { 0, 0 },
}
};
""")
@@ -823,6 +902,24 @@ static void decompress_metric(int offset, struct pmu_metric *pm)
_args.output_file.write('\twhile (*p++);')
_args.output_file.write("""}
+static void decompress_layout(int offset, struct pmu_layout *pm)
+{
+\tconst char *p = &big_c_string[offset];
+""")
+ for attr in _json_layout_attributes:
+ _args.output_file.write(f'\n\tpm->{attr} = ')
+ if attr in _json_enum_attributes:
+ _args.output_file.write("*p - '0';\n")
+ else:
+ _args.output_file.write("(*p == '\\0' ? NULL : p);\n")
+ if attr == _json_layout_attributes[-1]:
+ continue
+ if attr in _json_enum_attributes:
+ _args.output_file.write('\tp++;')
+ else:
+ _args.output_file.write('\twhile (*p++);')
+ _args.output_file.write("""}
+
static int pmu_events_table__for_each_event_pmu(const struct pmu_events_table *table,
const struct pmu_table_entry *pmu,
pmu_event_iter_fn fn,
@@ -978,6 +1075,21 @@ int pmu_metrics_table__for_each_metric(const struct pmu_metrics_table *table,
return 0;
}
+int pmu_layouts_table__for_each_layout(const struct pmu_layouts_table *table,
+ pmu_layout_iter_fn fn,
+ void *data) {
+ for (size_t i = 0; i < table->length; i++) {
+ struct pmu_layout pm;
+ int ret;
+
+ decompress_layout(table->entries[i].offset, &pm);
+ ret = fn(&pm, data);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
static const struct pmu_events_map *map_for_pmu(struct perf_pmu *pmu)
{
static struct {
@@ -1073,6 +1185,33 @@ const struct pmu_metrics_table *perf_pmu__find_metrics_table(struct perf_pmu *pm
return NULL;
}
+const struct pmu_layouts_table *perf_pmu__find_layouts_table(struct perf_pmu *pmu)
+{
+ const struct pmu_layouts_table *table = NULL;
+ char *cpuid = perf_pmu__getcpuid(pmu);
+ int i;
+
+ /* on some platforms which uses cpus map, cpuid can be NULL for
+ * PMUs other than CORE PMUs.
+ */
+ if (!cpuid)
+ return NULL;
+
+ i = 0;
+ for (;;) {
+ const struct pmu_events_map *map = &pmu_events_map[i++];
+ if (!map->arch)
+ break;
+
+ if (!strcmp_cpuid_str(map->cpuid, cpuid)) {
+ table = &map->layout_table;
+ break;
+ }
+ }
+ free(cpuid);
+ return table;
+}
+
const struct pmu_events_table *find_core_events_table(const char *arch, const char *cpuid)
{
for (const struct pmu_events_map *tables = &pmu_events_map[0];
@@ -1094,6 +1233,16 @@ const struct pmu_metrics_table *find_core_metrics_table(const char *arch, const
}
return NULL;
}
+const struct pmu_layouts_table *find_core_layouts_table(const char *arch, const char *cpuid)
+{
+ for (const struct pmu_events_map *tables = &pmu_events_map[0];
+ tables->arch;
+ tables++) {
+ if (!strcmp(tables->arch, arch) && !strcmp_cpuid_str(tables->cpuid, cpuid))
+ return &tables->layout_table;
+ }
+ return NULL;
+}
int pmu_for_each_core_event(pmu_event_iter_fn fn, void *data)
{
@@ -1122,6 +1271,19 @@ int pmu_for_each_core_metric(pmu_metric_iter_fn fn, void *data)
return 0;
}
+int pmu_for_each_core_layout(pmu_layout_iter_fn fn, void *data)
+{
+ for (const struct pmu_events_map *tables = &pmu_events_map[0];
+ tables->arch;
+ tables++) {
+ int ret = pmu_layouts_table__for_each_layout(&tables->layout_table, fn, data);
+
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
const struct pmu_events_table *find_sys_events_table(const char *name)
{
for (const struct pmu_sys_events *tables = &pmu_sys_event_tables[0];
@@ -1278,6 +1440,7 @@ struct pmu_table_entry {
ftw(arch_path, [], process_one_file)
print_pending_events()
print_pending_metrics()
+ print_pending_pmu_counts()
print_mapping_table(archs)
print_system_mapping_table()
@@ -45,6 +45,7 @@ struct pmu_event {
const char *desc;
const char *topic;
const char *long_desc;
+ const char *counter;
const char *pmu;
const char *unit;
bool perpkg;
@@ -67,8 +68,16 @@ struct pmu_metric {
enum metric_event_groups event_grouping;
};
+struct pmu_layout {
+ const char *pmu;
+ const char *desc;
+ int size;
+ int fixed_size;
+};
+
struct pmu_events_table;
struct pmu_metrics_table;
+struct pmu_layouts_table;
typedef int (*pmu_event_iter_fn)(const struct pmu_event *pe,
const struct pmu_events_table *table,
@@ -78,15 +87,20 @@ typedef int (*pmu_metric_iter_fn)(const struct pmu_metric *pm,
const struct pmu_metrics_table *table,
void *data);
+typedef int (*pmu_layout_iter_fn)(const struct pmu_layout *pm,
+ void *data);
+
int pmu_events_table__for_each_event(const struct pmu_events_table *table,
struct perf_pmu *pmu,
pmu_event_iter_fn fn,
void *data);
int pmu_events_table__find_event(const struct pmu_events_table *table,
- struct perf_pmu *pmu,
- const char *name,
- pmu_event_iter_fn fn,
- void *data);
+ struct perf_pmu *pmu,
+ const char *name,
+ pmu_event_iter_fn fn,
+ void *data);
+int pmu_layouts_table__for_each_layout(const struct pmu_layouts_table *table, pmu_layout_iter_fn fn,
+ void *data);
size_t pmu_events_table__num_events(const struct pmu_events_table *table,
struct perf_pmu *pmu);
@@ -95,10 +109,13 @@ int pmu_metrics_table__for_each_metric(const struct pmu_metrics_table *table, pm
const struct pmu_events_table *perf_pmu__find_events_table(struct perf_pmu *pmu);
const struct pmu_metrics_table *perf_pmu__find_metrics_table(struct perf_pmu *pmu);
+const struct pmu_layouts_table *perf_pmu__find_layouts_table(struct perf_pmu *pmu);
const struct pmu_events_table *find_core_events_table(const char *arch, const char *cpuid);
const struct pmu_metrics_table *find_core_metrics_table(const char *arch, const char *cpuid);
+const struct pmu_layouts_table *find_core_layouts_table(const char *arch, const char *cpuid);
int pmu_for_each_core_event(pmu_event_iter_fn fn, void *data);
int pmu_for_each_core_metric(pmu_metric_iter_fn fn, void *data);
+int pmu_for_each_core_layout(pmu_layout_iter_fn fn, void *data);
const struct pmu_events_table *find_sys_events_table(const char *name);
const struct pmu_metrics_table *find_sys_metrics_table(const char *name);