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perf metric: Add referenced metrics to hash data

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Adding referenced metrics to the parsing context so they can be resolved
during the metric processing.

Adding expr__add_ref function to store referenced metrics into parse
context.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200719181320.785305-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2020-07-19 20:13:11 +02:00 committed by Arnaldo Carvalho de Melo
parent 4ea2896715
commit fc393839c1
3 changed files with 80 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
tools/perf/util/expr.c
View File

@ -4,10 +4,14 @@
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "metricgroup.h"
#include "debug.h"
#include "expr.h"
#include "expr-bison.h"
#include "expr-flex.h"
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <ctype.h>
#ifdef PARSER_DEBUG
extern int expr_debug;
@ -63,6 +67,7 @@ int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
if (!data_ptr)
return -ENOMEM;
data_ptr->val = val;
data_ptr->is_ref = false;
ret = hashmap__set(&ctx->ids, id, data_ptr,
(const void **)&old_key, (void **)&old_data);
@ -73,6 +78,55 @@ int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
return ret;
}
int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref)
{
struct expr_id_data *data_ptr = NULL, *old_data = NULL;
char *old_key = NULL;
char *name, *p;
int ret;
data_ptr = zalloc(sizeof(*data_ptr));
if (!data_ptr)
return -ENOMEM;
name = strdup(ref->metric_name);
if (!name) {
free(data_ptr);
return -ENOMEM;
}
/*
* The jevents tool converts all metric expressions
* to lowercase, including metric references, hence
* we need to add lowercase name for metric, so it's
* properly found.
*/
for (p = name; *p; p++)
*p = tolower(*p);
/*
* Intentionally passing just const char pointers,
* originally from 'struct pmu_event' object.
* We don't need to change them, so there's no
* need to create our own copy.
*/
data_ptr->ref.metric_name = ref->metric_name;
data_ptr->ref.metric_expr = ref->metric_expr;
data_ptr->is_ref = true;
ret = hashmap__set(&ctx->ids, name, data_ptr,
(const void **)&old_key, (void **)&old_data);
if (ret)
free(data_ptr);
pr_debug2("adding ref metric %s: %s\n",
ref->metric_name, ref->metric_expr);
free(old_key);
free(old_data);
return ret;
}
int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
struct expr_id_data **data)
{

13
tools/perf/util/expr.h
View File

@ -11,12 +11,22 @@
#include "util/hashmap.h"
//#endif
struct metric_ref;
struct expr_parse_ctx {
struct hashmap ids;
};
struct expr_id_data {
double val;
union {
double val;
struct {
const char *metric_name;
const char *metric_expr;
} ref;
};
bool is_ref;
};
struct expr_scanner_ctx {
@ -29,6 +39,7 @@ void expr__ctx_clear(struct expr_parse_ctx *ctx);
void expr__del_id(struct expr_parse_ctx *ctx, const char *id);
int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref);
int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
struct expr_id_data **data);
int expr__parse(double *final_val, struct expr_parse_ctx *ctx,

20
tools/perf/util/stat-shadow.c
View File

@ -731,13 +731,14 @@ static void print_smi_cost(struct perf_stat_config *config,
}
static int prepare_metric(struct evsel **metric_events,
struct metric_ref *metric_refs,
struct expr_parse_ctx *pctx,
int cpu,
struct runtime_stat *st)
{
double scale;
char *n, *pn;
int i;
int i, j, ret;
expr__ctx_init(pctx);
for (i = 0; metric_events[i]; i++) {
@ -778,12 +779,19 @@ static int prepare_metric(struct evsel **metric_events,
expr__add_id_val(pctx, n, avg_stats(stats)*scale);
}
for (j = 0; metric_refs && metric_refs[j].metric_name; j++) {
ret = expr__add_ref(pctx, &metric_refs[j]);
if (ret)
return ret;
}
return i;
}
static void generic_metric(struct perf_stat_config *config,
const char *metric_expr,
struct evsel **metric_events,
struct metric_ref *metric_refs,
char *name,
const char *metric_name,
const char *metric_unit,
@ -798,7 +806,7 @@ static void generic_metric(struct perf_stat_config *config,
int i;
void *ctxp = out->ctx;
i = prepare_metric(metric_events, &pctx, cpu, st);
i = prepare_metric(metric_events, metric_refs, &pctx, cpu, st);
if (i < 0)
return;
@ -847,7 +855,7 @@ double test_generic_metric(struct metric_expr *mexp, int cpu, struct runtime_sta
struct expr_parse_ctx pctx;
double ratio;
if (prepare_metric(mexp->metric_events, &pctx, cpu, st) < 0)
if (prepare_metric(mexp->metric_events, mexp->metric_refs, &pctx, cpu, st) < 0)
return 0.;
if (expr__parse(&ratio, &pctx, mexp->metric_expr, 1))
@ -1064,8 +1072,8 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
else
print_metric(config, ctxp, NULL, NULL, name, 0);
} else if (evsel->metric_expr) {
generic_metric(config, evsel->metric_expr, evsel->metric_events, evsel->name,
evsel->metric_name, NULL, 1, cpu, out, st);
generic_metric(config, evsel->metric_expr, evsel->metric_events, NULL,
evsel->name, evsel->metric_name, NULL, 1, cpu, out, st);
} else if (runtime_stat_n(st, STAT_NSECS, 0, cpu) != 0) {
char unit = 'M';
char unit_buf[10];
@ -1093,7 +1101,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
if (num++ > 0)
out->new_line(config, ctxp);
generic_metric(config, mexp->metric_expr, mexp->metric_events,
evsel->name, mexp->metric_name,
mexp->metric_refs, evsel->name, mexp->metric_name,
mexp->metric_unit, mexp->runtime, cpu, out, st);
}
}