[PATCH v2 4/6] perf list: Give more details about raw event encodings
From: Ian Rogers
Date: Thu Mar 07 2024 - 12:41:32 EST
List all the PMUs, not just the first core one, and list real format
specifiers with value ranges.
Before:
```
$ perf list
..
rNNN [Raw hardware event descriptor]
cpu/t1=v1[,t2=v2,t3 ...]/modifier [Raw hardware event descriptor]
[(see 'man perf-list' on how to encode it)]
mem:<addr>[/len][:access] [Hardware breakpoint]
..
```
After:
```
$ perf list
..
rNNN [Raw event descriptor]
cpu/event=0..255,pc,edge,.../modifier [Raw event descriptor]
[(see 'man perf-list' or 'man perf-record' on how to encode it)]
breakpoint//modifier [Raw event descriptor]
cstate_core/event=0..0xffffffffffffffff/modifier [Raw event descriptor]
cstate_pkg/event=0..0xffffffffffffffff/modifier [Raw event descriptor]
i915/i915_eventid=0..0x1fffff/modifier [Raw event descriptor]
intel_bts//modifier [Raw event descriptor]
intel_pt/ptw,event,cyc_thresh=0..15,.../modifier [Raw event descriptor]
kprobe/retprobe/modifier [Raw event descriptor]
msr/event=0..0xffffffffffffffff/modifier [Raw event descriptor]
power/event=0..255/modifier [Raw event descriptor]
software//modifier [Raw event descriptor]
tracepoint//modifier [Raw event descriptor]
uncore_arb/event=0..255,edge,inv,.../modifier [Raw event descriptor]
uncore_cbox/event=0..255,edge,inv,.../modifier [Raw event descriptor]
uncore_clock/event=0..255/modifier [Raw event descriptor]
uncore_imc_free_running/event=0..255,umask=0..255/modifier[Raw event descriptor]
uprobe/ref_ctr_offset=0..0xffffffff,retprobe/modifier[Raw event descriptor]
mem:<addr>[/len][:access] [Hardware breakpoint]
..
```
With '--details' provide more details on the formats encoding:
```
cpu/event=0..255,pc,edge,.../modifier [Raw event descriptor]
[(see 'man perf-list' or 'man perf-record' on how to encode it)]
cpu/event=0..255,pc,edge,offcore_rsp=0..0xffffffffffffffff,ldlat=0..0xffff,inv,
umask=0..255,frontend=0..0xffffff,cmask=0..255,config=0..0xffffffffffffffff,
config1=0..0xffffffffffffffff,config2=0..0xffffffffffffffff,config3=0..0xffffffffffffffff,
name=string,period=number,freq=number,branch_type=(u|k|hv|any|...),time,
call-graph=(fp|dwarf|lbr),stack-size=number,max-stack=number,nr=number,inherit,no-inherit,
overwrite,no-overwrite,percore,aux-output,aux-sample-size=number/modifier
breakpoint//modifier [Raw event descriptor]
breakpoint//modifier
cstate_core/event=0..0xffffffffffffffff/modifier [Raw event descriptor]
cstate_core/event=0..0xffffffffffffffff/modifier
cstate_pkg/event=0..0xffffffffffffffff/modifier [Raw event descriptor]
cstate_pkg/event=0..0xffffffffffffffff/modifier
i915/i915_eventid=0..0x1fffff/modifier [Raw event descriptor]
i915/i915_eventid=0..0x1fffff/modifier
intel_bts//modifier [Raw event descriptor]
intel_bts//modifier
intel_pt/ptw,event,cyc_thresh=0..15,.../modifier [Raw event descriptor]
intel_pt/ptw,event,cyc_thresh=0..15,pt,notnt,branch,tsc,pwr_evt,fup_on_ptw,cyc,noretcomp,
mtc,psb_period=0..15,mtc_period=0..15/modifier
kprobe/retprobe/modifier [Raw event descriptor]
kprobe/retprobe/modifier
msr/event=0..0xffffffffffffffff/modifier [Raw event descriptor]
msr/event=0..0xffffffffffffffff/modifier
power/event=0..255/modifier [Raw event descriptor]
power/event=0..255/modifier
software//modifier [Raw event descriptor]
software//modifier
tracepoint//modifier [Raw event descriptor]
tracepoint//modifier
uncore_arb/event=0..255,edge,inv,.../modifier [Raw event descriptor]
uncore_arb/event=0..255,edge,inv,umask=0..255,cmask=0..31/modifier
uncore_cbox/event=0..255,edge,inv,.../modifier [Raw event descriptor]
uncore_cbox/event=0..255,edge,inv,umask=0..255,cmask=0..31/modifier
uncore_clock/event=0..255/modifier [Raw event descriptor]
uncore_clock/event=0..255/modifier
uncore_imc_free_running/event=0..255,umask=0..255/modifier[Raw event descriptor]
uncore_imc_free_running/event=0..255,umask=0..255/modifier
uprobe/ref_ctr_offset=0..0xffffffff,retprobe/modifier[Raw event descriptor]
uprobe/ref_ctr_offset=0..0xffffffff,retprobe/modifier
```
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/util/pmu.c | 61 +++++++++++++++++++++-
tools/perf/util/pmu.h | 3 ++
tools/perf/util/pmus.c | 94 ++++++++++++++++++++++++++++++++++
tools/perf/util/pmus.h | 1 +
tools/perf/util/print-events.c | 20 +-------
5 files changed, 160 insertions(+), 19 deletions(-)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 24be587e3537..e24bc3b8f696 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1603,6 +1603,61 @@ bool perf_pmu__has_format(const struct perf_pmu *pmu, const char *name)
return false;
}
+int perf_pmu__for_each_format(struct perf_pmu *pmu, void *state, pmu_format_callback cb)
+{
+ static const char *const terms[] = {
+ "config=0..0xffffffffffffffff",
+ "config1=0..0xffffffffffffffff",
+ "config2=0..0xffffffffffffffff",
+ "config3=0..0xffffffffffffffff",
+ "name=string",
+ "period=number",
+ "freq=number",
+ "branch_type=(u|k|hv|any|...)",
+ "time",
+ "call-graph=(fp|dwarf|lbr)",
+ "stack-size=number",
+ "max-stack=number",
+ "nr=number",
+ "inherit",
+ "no-inherit",
+ "overwrite",
+ "no-overwrite",
+ "percore",
+ "aux-output",
+ "aux-sample-size=number",
+ };
+ struct perf_pmu_format *format;
+ int ret;
+
+ /*
+ * max-events and driver-config are missing above as are the internal
+ * types user, metric-id, raw, legacy cache and hardware. Assert against
+ * the enum parse_events__term_type so they are kept in sync.
+ */
+ _Static_assert(ARRAY_SIZE(terms) == __PARSE_EVENTS__TERM_TYPE_NR - 6);
+ list_for_each_entry(format, &pmu->format, list) {
+ perf_pmu_format__load(pmu, format);
+ ret = cb(state, format->name, (int)format->value, format->bits);
+ if (ret)
+ return ret;
+ }
+ if (!pmu->is_core)
+ return 0;
+
+ for (size_t i = 0; i < ARRAY_SIZE(terms); i++) {
+ int config = PERF_PMU_FORMAT_VALUE_CONFIG;
+
+ if (i < PERF_PMU_FORMAT_VALUE_CONFIG_END)
+ config = i;
+
+ ret = cb(state, terms[i], config, /*bits=*/NULL);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
bool is_pmu_core(const char *name)
{
return !strcmp(name, "cpu") || !strcmp(name, "cpum_cf") || is_sysfs_pmu_core(name);
@@ -1697,8 +1752,12 @@ int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus,
pmu_add_cpu_aliases(pmu);
list_for_each_entry(event, &pmu->aliases, list) {
size_t buf_used;
+ int pmu_name_len;
info.pmu_name = event->pmu_name ?: pmu->name;
+ pmu_name_len = skip_duplicate_pmus
+ ? pmu_name_len_no_suffix(info.pmu_name, /*num=*/NULL)
+ : (int)strlen(info.pmu_name);
info.alias = NULL;
if (event->desc) {
info.name = event->name;
@@ -1723,7 +1782,7 @@ int perf_pmu__for_each_event(struct perf_pmu *pmu, bool skip_duplicate_pmus,
info.encoding_desc = buf + buf_used;
parse_events_terms__to_strbuf(&event->terms, &sb);
buf_used += snprintf(buf + buf_used, sizeof(buf) - buf_used,
- "%s/%s/", info.pmu_name, sb.buf) + 1;
+ "%.*s/%s/", pmu_name_len, info.pmu_name, sb.buf) + 1;
info.topic = event->topic;
info.str = sb.buf;
info.deprecated = event->deprecated;
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index e35d985206db..9f5284b29ecf 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -196,6 +196,8 @@ struct pmu_event_info {
};
typedef int (*pmu_event_callback)(void *state, struct pmu_event_info *info);
+typedef int (*pmu_format_callback)(void *state, const char *name, int config,
+ const unsigned long *bits);
void pmu_add_sys_aliases(struct perf_pmu *pmu);
int perf_pmu__config(struct perf_pmu *pmu, struct perf_event_attr *attr,
@@ -215,6 +217,7 @@ int perf_pmu__find_event(struct perf_pmu *pmu, const char *event, void *state, p
int perf_pmu__format_parse(struct perf_pmu *pmu, int dirfd, bool eager_load);
void perf_pmu_format__set_value(void *format, int config, unsigned long *bits);
bool perf_pmu__has_format(const struct perf_pmu *pmu, const char *name);
+int perf_pmu__for_each_format(struct perf_pmu *pmu, void *state, pmu_format_callback cb);
bool is_pmu_core(const char *name);
bool perf_pmu__supports_legacy_cache(const struct perf_pmu *pmu);
diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c
index 16505071d362..2fd369e45832 100644
--- a/tools/perf/util/pmus.c
+++ b/tools/perf/util/pmus.c
@@ -16,6 +16,7 @@
#include "pmus.h"
#include "pmu.h"
#include "print-events.h"
+#include "strbuf.h"
/*
* core_pmus: A PMU belongs to core_pmus if it's name is "cpu" or it's sysfs
@@ -503,6 +504,99 @@ void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *p
zfree(&aliases);
}
+struct build_format_string_args {
+ struct strbuf short_string;
+ struct strbuf long_string;
+ int num_formats;
+};
+
+static int build_format_string(void *state, const char *name, int config,
+ const unsigned long *bits)
+{
+ struct build_format_string_args *args = state;
+ unsigned int num_bits;
+ int ret1, ret2 = 0;
+
+ (void)config;
+ args->num_formats++;
+ if (args->num_formats > 1) {
+ strbuf_addch(&args->long_string, ',');
+ if (args->num_formats < 4)
+ strbuf_addch(&args->short_string, ',');
+ }
+ num_bits = bits ? bitmap_weight(bits, PERF_PMU_FORMAT_BITS) : 0;
+ if (num_bits <= 1) {
+ ret1 = strbuf_addf(&args->long_string, "%s", name);
+ if (args->num_formats < 4)
+ ret2 = strbuf_addf(&args->short_string, "%s", name);
+ } else if (num_bits > 8) {
+ ret1 = strbuf_addf(&args->long_string, "%s=0..0x%llx", name,
+ ULLONG_MAX >> (64 - num_bits));
+ if (args->num_formats < 4) {
+ ret2 = strbuf_addf(&args->short_string, "%s=0..0x%llx", name,
+ ULLONG_MAX >> (64 - num_bits));
+ }
+ } else {
+ ret1 = strbuf_addf(&args->long_string, "%s=0..%llu", name,
+ ULLONG_MAX >> (64 - num_bits));
+ if (args->num_formats < 4) {
+ ret2 = strbuf_addf(&args->short_string, "%s=0..%llu", name,
+ ULLONG_MAX >> (64 - num_bits));
+ }
+ }
+ return ret1 < 0 ? ret1 : (ret2 < 0 ? ret2 : 0);
+}
+
+void perf_pmus__print_raw_pmu_events(const struct print_callbacks *print_cb, void *print_state)
+{
+ bool skip_duplicate_pmus = print_cb->skip_duplicate_pmus(print_state);
+ struct perf_pmu *(*scan_fn)(struct perf_pmu *);
+ struct perf_pmu *pmu = NULL;
+
+ if (skip_duplicate_pmus)
+ scan_fn = perf_pmus__scan_skip_duplicates;
+ else
+ scan_fn = perf_pmus__scan;
+
+ while ((pmu = scan_fn(pmu)) != NULL) {
+ struct build_format_string_args format_args = {
+ .short_string = STRBUF_INIT,
+ .long_string = STRBUF_INIT,
+ .num_formats = 0,
+ };
+ int len = pmu_name_len_no_suffix(pmu->name, /*num=*/NULL);
+ const char *desc = "(see 'man perf-list' or 'man perf-record' on how to encode it)";
+
+ if (!pmu->is_core)
+ desc = NULL;
+
+ strbuf_addf(&format_args.short_string, "%.*s/", len, pmu->name);
+ strbuf_addf(&format_args.long_string, "%.*s/", len, pmu->name);
+ perf_pmu__for_each_format(pmu, &format_args, build_format_string);
+
+ if (format_args.num_formats > 3)
+ strbuf_addf(&format_args.short_string, ",.../modifier");
+ else
+ strbuf_addf(&format_args.short_string, "/modifier");
+
+ strbuf_addf(&format_args.long_string, "/modifier");
+ print_cb->print_event(print_state,
+ /*topic=*/NULL,
+ /*pmu_name=*/NULL,
+ format_args.short_string.buf,
+ /*event_alias=*/NULL,
+ /*scale_unit=*/NULL,
+ /*deprecated=*/false,
+ "Raw event descriptor",
+ desc,
+ /*long_desc=*/NULL,
+ format_args.long_string.buf);
+
+ strbuf_release(&format_args.short_string);
+ strbuf_release(&format_args.long_string);
+ }
+}
+
bool perf_pmus__have_event(const char *pname, const char *name)
{
struct perf_pmu *pmu = perf_pmus__find(pname);
diff --git a/tools/perf/util/pmus.h b/tools/perf/util/pmus.h
index 94d2a08d894b..eec599d8aebd 100644
--- a/tools/perf/util/pmus.h
+++ b/tools/perf/util/pmus.h
@@ -18,6 +18,7 @@ struct perf_pmu *perf_pmus__scan_core(struct perf_pmu *pmu);
const struct perf_pmu *perf_pmus__pmu_for_pmu_filter(const char *str);
void perf_pmus__print_pmu_events(const struct print_callbacks *print_cb, void *print_state);
+void perf_pmus__print_raw_pmu_events(const struct print_callbacks *print_cb, void *print_state);
bool perf_pmus__have_event(const char *pname, const char *name);
int perf_pmus__num_core_pmus(void);
bool perf_pmus__supports_extended_type(void);
diff --git a/tools/perf/util/print-events.c b/tools/perf/util/print-events.c
index e0d2b49bab66..3f38c27f0157 100644
--- a/tools/perf/util/print-events.c
+++ b/tools/perf/util/print-events.c
@@ -39,7 +39,7 @@ static const char * const event_type_descriptors[] = {
"Software event",
"Tracepoint event",
"Hardware cache event",
- "Raw hardware event descriptor",
+ "Raw event descriptor",
"Hardware breakpoint",
};
@@ -416,8 +416,6 @@ void print_symbol_events(const struct print_callbacks *print_cb, void *print_sta
*/
void print_events(const struct print_callbacks *print_cb, void *print_state)
{
- char *tmp;
-
print_symbol_events(print_cb, print_state, PERF_TYPE_HARDWARE,
event_symbols_hw, PERF_COUNT_HW_MAX);
print_symbol_events(print_cb, print_state, PERF_TYPE_SOFTWARE,
@@ -441,21 +439,7 @@ void print_events(const struct print_callbacks *print_cb, void *print_state)
/*long_desc=*/NULL,
/*encoding_desc=*/NULL);
- if (asprintf(&tmp, "%s/t1=v1[,t2=v2,t3 ...]/modifier",
- perf_pmus__scan_core(/*pmu=*/NULL)->name) > 0) {
- print_cb->print_event(print_state,
- /*topic=*/NULL,
- /*pmu_name=*/NULL,
- tmp,
- /*event_alias=*/NULL,
- /*scale_unit=*/NULL,
- /*deprecated=*/false,
- event_type_descriptors[PERF_TYPE_RAW],
- "(see 'man perf-list' on how to encode it)",
- /*long_desc=*/NULL,
- /*encoding_desc=*/NULL);
- free(tmp);
- }
+ perf_pmus__print_raw_pmu_events(print_cb, print_state);
print_cb->print_event(print_state,
/*topic=*/NULL,
--
2.44.0.278.ge034bb2e1d-goog