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perf metric: Add metric new() and free() methods 

Metrics are complex enough that a new/free reduces the risk of memory
leaks. Move static functions used in new.

Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Antonov <alexander.antonov@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrew Kilroy <andrew.kilroy@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Changbin Du <changbin.du@intel.com>
Cc: Denys Zagorui <dzagorui@cisco.com>
Cc: Fabian Hemmer <copy@copy.sh>
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nicholas Fraser <nfraser@codeweavers.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: ShihCheng Tu <mrtoastcheng@gmail.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Wan Jiabing <wanjiabing@vivo.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20211015172132.1162559-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2021-10-15 10:21:18 -07:00 committed by Arnaldo Carvalho de Melo
parent 68074811df
commit 3d81d761a5
1 changed files with 75 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

137
tools/perf/util/metricgroup.c
View File

@ -127,6 +127,78 @@ struct metric {
bool has_constraint;
};
static void metricgroup___watchdog_constraint_hint(const char *name, bool foot)
{
static bool violate_nmi_constraint;
if (!foot) {
pr_warning("Splitting metric group %s into standalone metrics.\n", name);
violate_nmi_constraint = true;
return;
}
if (!violate_nmi_constraint)
return;
pr_warning("Try disabling the NMI watchdog to comply NO_NMI_WATCHDOG metric constraint:\n"
" echo 0 > /proc/sys/kernel/nmi_watchdog\n"
" perf stat ...\n"
" echo 1 > /proc/sys/kernel/nmi_watchdog\n");
}
static bool metricgroup__has_constraint(const struct pmu_event *pe)
{
if (!pe->metric_constraint)
return false;
if (!strcmp(pe->metric_constraint, "NO_NMI_WATCHDOG") &&
sysctl__nmi_watchdog_enabled()) {
metricgroup___watchdog_constraint_hint(pe->metric_name, false);
return true;
}
return false;
}
static struct metric *metric__new(const struct pmu_event *pe,
bool metric_no_group,
int runtime)
{
struct metric *m;
m = zalloc(sizeof(*m));
if (!m)
return NULL;
m->pctx = expr__ctx_new();
if (!m->pctx) {
free(m);
return NULL;
}
m->metric_name = pe->metric_name;
m->metric_expr = pe->metric_expr;
m->metric_unit = pe->unit;
m->pctx->runtime = runtime;
m->has_constraint = metric_no_group || metricgroup__has_constraint(pe);
INIT_LIST_HEAD(&m->metric_refs);
m->metric_refs_cnt = 0;
return m;
}
static void metric__free(struct metric *m)
{
struct metric_ref_node *ref, *tmp;
list_for_each_entry_safe(ref, tmp, &m->metric_refs, list) {
list_del(&ref->list);
free(ref);
}
expr__ctx_free(m->pctx);
free(m);
}
#define RECURSION_ID_MAX 1000
struct expr_ids {
@ -736,39 +808,6 @@ static void metricgroup__add_metric_non_group(struct strbuf *events,
}
}
static void metricgroup___watchdog_constraint_hint(const char *name, bool foot)
{
static bool violate_nmi_constraint;
if (!foot) {
pr_warning("Splitting metric group %s into standalone metrics.\n", name);
violate_nmi_constraint = true;
return;
}
if (!violate_nmi_constraint)
return;
pr_warning("Try disabling the NMI watchdog to comply NO_NMI_WATCHDOG metric constraint:\n"
" echo 0 > /proc/sys/kernel/nmi_watchdog\n"
" perf stat ...\n"
" echo 1 > /proc/sys/kernel/nmi_watchdog\n");
}
static bool metricgroup__has_constraint(const struct pmu_event *pe)
{
if (!pe->metric_constraint)
return false;
if (!strcmp(pe->metric_constraint, "NO_NMI_WATCHDOG") &&
sysctl__nmi_watchdog_enabled()) {
metricgroup___watchdog_constraint_hint(pe->metric_name, false);
return true;
}
return false;
}
int __weak arch_get_runtimeparam(const struct pmu_event *pe __maybe_unused)
{
return 1;
@ -813,23 +852,10 @@ static int __add_metric(struct list_head *metric_list,
* We got in here for the parent group,
* allocate it and put it on the list.
*/
m = zalloc(sizeof(*m));
m = metric__new(pe, metric_no_group, runtime);
if (!m)
return -ENOMEM;
m->pctx = expr__ctx_new();
if (!m->pctx) {
free(m);
return -ENOMEM;
}
m->metric_name = pe->metric_name;
m->metric_expr = pe->metric_expr;
m->metric_unit = pe->unit;
m->pctx->runtime = runtime;
m->has_constraint = metric_no_group || metricgroup__has_constraint(pe);
INIT_LIST_HEAD(&m->metric_refs);
m->metric_refs_cnt = 0;
parent = expr_ids__alloc(ids);
if (!parent) {
free(m);
@ -877,8 +903,7 @@ static int __add_metric(struct list_head *metric_list,
*/
if (expr__find_ids(pe->metric_expr, NULL, m->pctx) < 0) {
if (m->metric_refs_cnt == 0) {
expr__ctx_free(m->pctx);
free(m);
metric__free(m);
*mp = NULL;
}
return -EINVAL;
@ -1251,25 +1276,13 @@ static int metricgroup__add_metric_list(const char *list, bool metric_no_group,
return ret;
}
static void metric__free_refs(struct metric *metric)
{
struct metric_ref_node *ref, *tmp;
list_for_each_entry_safe(ref, tmp, &metric->metric_refs, list) {
list_del(&ref->list);
free(ref);
}
}
static void metricgroup__free_metrics(struct list_head *metric_list)
{
struct metric *m, *tmp;
list_for_each_entry_safe (m, tmp, metric_list, nd) {
metric__free_refs(m);
expr__ctx_free(m->pctx);
list_del_init(&m->nd);
free(m);
metric__free(m);
}
}