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Message-Id: <20241114230713.330701-3-irogers@google.com>
Date: Thu, 14 Nov 2024 15:07:12 -0800
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, Andi Kleen <ak@...ux.intel.com>,
"Ahelenia Ziemiańska" <nabijaczleweli@...ijaczleweli.xyz>, Chen Ni <nichen@...as.ac.cn>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/3] perf values: Use evsel rather than evsel->idx
An evsel idx may not be stable due to sorting, evlist removal,
etc. Avoid use of the idx where the evsel itself can be used to avoid
these problems. This removed 1 values array and duplicated evsel name
strings.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/builtin-report.c | 4 +-
tools/perf/util/values.c | 106 +++++++++++++++---------------------
tools/perf/util/values.h | 9 +--
3 files changed, 51 insertions(+), 68 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 048c91960ba9..e5478082845c 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -348,11 +348,9 @@ static int process_read_event(const struct perf_tool *tool,
struct report *rep = container_of(tool, struct report, tool);
if (rep->show_threads) {
- const char *name = evsel__name(evsel);
int err = perf_read_values_add_value(&rep->show_threads_values,
event->read.pid, event->read.tid,
- evsel->core.idx,
- name,
+ evsel,
event->read.value);
if (err)
diff --git a/tools/perf/util/values.c b/tools/perf/util/values.c
index b9823f414f10..ec72d29f3d58 100644
--- a/tools/perf/util/values.c
+++ b/tools/perf/util/values.c
@@ -8,6 +8,7 @@
#include "values.h"
#include "debug.h"
+#include "evsel.h"
int perf_read_values_init(struct perf_read_values *values)
{
@@ -22,21 +23,17 @@ int perf_read_values_init(struct perf_read_values *values)
values->threads = 0;
values->counters_max = 16;
- values->counterrawid = malloc(values->counters_max
- * sizeof(*values->counterrawid));
- values->countername = malloc(values->counters_max
- * sizeof(*values->countername));
- if (!values->counterrawid || !values->countername) {
- pr_debug("failed to allocate read_values counters arrays");
+ values->counters = malloc(values->counters_max * sizeof(*values->counters));
+ if (!values->counters) {
+ pr_debug("failed to allocate read_values counters array");
goto out_free_counter;
}
- values->counters = 0;
+ values->num_counters = 0;
return 0;
out_free_counter:
- zfree(&values->counterrawid);
- zfree(&values->countername);
+ zfree(&values->counters);
out_free_pid:
zfree(&values->pid);
zfree(&values->tid);
@@ -56,10 +53,7 @@ void perf_read_values_destroy(struct perf_read_values *values)
zfree(&values->value);
zfree(&values->pid);
zfree(&values->tid);
- zfree(&values->counterrawid);
- for (i = 0; i < values->counters; i++)
- zfree(&values->countername[i]);
- zfree(&values->countername);
+ zfree(&values->counters);
}
static int perf_read_values__enlarge_threads(struct perf_read_values *values)
@@ -116,81 +110,71 @@ static int perf_read_values__findnew_thread(struct perf_read_values *values,
static int perf_read_values__enlarge_counters(struct perf_read_values *values)
{
- char **countername;
- int i, counters_max = values->counters_max * 2;
- u64 *counterrawid = realloc(values->counterrawid, counters_max * sizeof(*values->counterrawid));
+ int counters_max = values->counters_max * 2;
+ struct evsel **new_counters = realloc(values->counters,
+ counters_max * sizeof(*values->counters));
- if (!counterrawid) {
- pr_debug("failed to enlarge read_values rawid array");
+ if (!new_counters) {
+ pr_debug("failed to enlarge read_values counters array");
goto out_enomem;
}
- countername = realloc(values->countername, counters_max * sizeof(*values->countername));
- if (!countername) {
- pr_debug("failed to enlarge read_values rawid array");
- goto out_free_rawid;
- }
-
- for (i = 0; i < values->threads; i++) {
+ for (int i = 0; i < values->threads; i++) {
u64 *value = realloc(values->value[i], counters_max * sizeof(**values->value));
- int j;
if (!value) {
pr_debug("failed to enlarge read_values ->values array");
- goto out_free_name;
+ goto out_free_counters;
}
- for (j = values->counters_max; j < counters_max; j++)
+ for (int j = values->counters_max; j < counters_max; j++)
value[j] = 0;
values->value[i] = value;
}
values->counters_max = counters_max;
- values->counterrawid = counterrawid;
- values->countername = countername;
+ values->counters = new_counters;
return 0;
-out_free_name:
- free(countername);
-out_free_rawid:
- free(counterrawid);
+out_free_counters:
+ free(new_counters);
out_enomem:
return -ENOMEM;
}
static int perf_read_values__findnew_counter(struct perf_read_values *values,
- u64 rawid, const char *name)
+ struct evsel *evsel)
{
int i;
- for (i = 0; i < values->counters; i++)
- if (values->counterrawid[i] == rawid)
+ for (i = 0; i < values->num_counters; i++)
+ if (values->counters[i] == evsel)
return i;
- if (values->counters == values->counters_max) {
- i = perf_read_values__enlarge_counters(values);
- if (i)
- return i;
+ if (values->num_counters == values->counters_max) {
+ int err = perf_read_values__enlarge_counters(values);
+
+ if (err)
+ return err;
}
- i = values->counters++;
- values->counterrawid[i] = rawid;
- values->countername[i] = strdup(name);
+ i = values->num_counters++;
+ values->counters[i] = evsel;
return i;
}
int perf_read_values_add_value(struct perf_read_values *values,
u32 pid, u32 tid,
- u64 rawid, const char *name, u64 value)
+ struct evsel *evsel, u64 value)
{
int tindex, cindex;
tindex = perf_read_values__findnew_thread(values, pid, tid);
if (tindex < 0)
return tindex;
- cindex = perf_read_values__findnew_counter(values, rawid, name);
+ cindex = perf_read_values__findnew_counter(values, evsel);
if (cindex < 0)
return cindex;
@@ -205,15 +189,15 @@ static void perf_read_values__display_pretty(FILE *fp,
int pidwidth, tidwidth;
int *counterwidth;
- counterwidth = malloc(values->counters * sizeof(*counterwidth));
+ counterwidth = malloc(values->num_counters * sizeof(*counterwidth));
if (!counterwidth) {
fprintf(fp, "INTERNAL ERROR: Failed to allocate counterwidth array\n");
return;
}
tidwidth = 3;
pidwidth = 3;
- for (j = 0; j < values->counters; j++)
- counterwidth[j] = strlen(values->countername[j]);
+ for (j = 0; j < values->num_counters; j++)
+ counterwidth[j] = strlen(evsel__name(values->counters[j]));
for (i = 0; i < values->threads; i++) {
int width;
@@ -223,7 +207,7 @@ static void perf_read_values__display_pretty(FILE *fp,
width = snprintf(NULL, 0, "%d", values->tid[i]);
if (width > tidwidth)
tidwidth = width;
- for (j = 0; j < values->counters; j++) {
+ for (j = 0; j < values->num_counters; j++) {
width = snprintf(NULL, 0, "%" PRIu64, values->value[i][j]);
if (width > counterwidth[j])
counterwidth[j] = width;
@@ -231,14 +215,14 @@ static void perf_read_values__display_pretty(FILE *fp,
}
fprintf(fp, "# %*s %*s", pidwidth, "PID", tidwidth, "TID");
- for (j = 0; j < values->counters; j++)
- fprintf(fp, " %*s", counterwidth[j], values->countername[j]);
+ for (j = 0; j < values->num_counters; j++)
+ fprintf(fp, " %*s", counterwidth[j], evsel__name(values->counters[j]));
fprintf(fp, "\n");
for (i = 0; i < values->threads; i++) {
fprintf(fp, " %*d %*d", pidwidth, values->pid[i],
tidwidth, values->tid[i]);
- for (j = 0; j < values->counters; j++)
+ for (j = 0; j < values->num_counters; j++)
fprintf(fp, " %*" PRIu64,
counterwidth[j], values->value[i][j]);
fprintf(fp, "\n");
@@ -266,16 +250,16 @@ static void perf_read_values__display_raw(FILE *fp,
if (width > tidwidth)
tidwidth = width;
}
- for (j = 0; j < values->counters; j++) {
- width = strlen(values->countername[j]);
+ for (j = 0; j < values->num_counters; j++) {
+ width = strlen(evsel__name(values->counters[j]));
if (width > namewidth)
namewidth = width;
- width = snprintf(NULL, 0, "%" PRIx64, values->counterrawid[j]);
+ width = snprintf(NULL, 0, "%x", values->counters[j]->core.idx);
if (width > rawwidth)
rawwidth = width;
}
for (i = 0; i < values->threads; i++) {
- for (j = 0; j < values->counters; j++) {
+ for (j = 0; j < values->num_counters; j++) {
width = snprintf(NULL, 0, "%" PRIu64, values->value[i][j]);
if (width > countwidth)
countwidth = width;
@@ -287,12 +271,12 @@ static void perf_read_values__display_raw(FILE *fp,
namewidth, "Name", rawwidth, "Raw",
countwidth, "Count");
for (i = 0; i < values->threads; i++)
- for (j = 0; j < values->counters; j++)
- fprintf(fp, " %*d %*d %*s %*" PRIx64 " %*" PRIu64,
+ for (j = 0; j < values->num_counters; j++)
+ fprintf(fp, " %*d %*d %*s %*x %*" PRIu64,
pidwidth, values->pid[i],
tidwidth, values->tid[i],
- namewidth, values->countername[j],
- rawwidth, values->counterrawid[j],
+ namewidth, evsel__name(values->counters[j]),
+ rawwidth, values->counters[j]->core.idx,
countwidth, values->value[i][j]);
}
diff --git a/tools/perf/util/values.h b/tools/perf/util/values.h
index 791c1ad606c2..bbca33daca19 100644
--- a/tools/perf/util/values.h
+++ b/tools/perf/util/values.h
@@ -5,14 +5,15 @@
#include <stdio.h>
#include <linux/types.h>
+struct evsel;
+
struct perf_read_values {
int threads;
int threads_max;
u32 *pid, *tid;
- int counters;
+ int num_counters;
int counters_max;
- u64 *counterrawid;
- char **countername;
+ struct evsel **counters;
u64 **value;
};
@@ -21,7 +22,7 @@ void perf_read_values_destroy(struct perf_read_values *values);
int perf_read_values_add_value(struct perf_read_values *values,
u32 pid, u32 tid,
- u64 rawid, const char *name, u64 value);
+ struct evsel *evsel, u64 value);
void perf_read_values_display(FILE *fp, struct perf_read_values *values,
int raw);
--
2.47.0.338.g60cca15819-goog
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