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Message-ID: <fb6c23a4-628d-4777-4863-b8b49e1d20cc@linux.ibm.com>
Date: Tue, 26 Oct 2021 13:40:48 +0530
From: kajoljain <kjain@...ux.ibm.com>
To: Ian Rogers <irogers@...gle.com>, Andi Kleen <ak@...ux.intel.com>,
Jiri Olsa <jolsa@...hat.com>,
Jin Yao <yao.jin@...ux.intel.com>,
Namhyung Kim <namhyung@...nel.org>,
John Garry <john.garry@...wei.com>,
"Paul A . Clarke" <pc@...ibm.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Riccardo Mancini <rickyman7@...il.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Kees Cook <keescook@...omium.org>,
Sami Tolvanen <samitolvanen@...gle.com>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Jacob Keller <jacob.e.keller@...el.com>,
Zhen Lei <thunder.leizhen@...wei.com>,
ToastC <mrtoastcheng@...il.com>,
Joakim Zhang <qiangqing.zhang@....com>,
Felix Fietkau <nbd@....name>,
Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
Song Liu <songliubraving@...com>, Fabian Hemmer <copy@...y.sh>,
Alexander Antonov <alexander.antonov@...ux.intel.com>,
Nicholas Fraser <nfraser@...eweavers.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Denys Zagorui <dzagorui@...co.com>,
Wan Jiabing <wanjiabing@...o.com>,
Thomas Richter <tmricht@...ux.ibm.com>,
Sumanth Korikkar <sumanthk@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Changbin Du <changbin.du@...el.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
Andrew Kilroy <andrew.kilroy@....com>
Cc: Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 05/21] perf metric: Move runtime value to the expr
context
On 10/15/21 10:51 PM, Ian Rogers wrote:
> The runtime value is needed when recursively parsing metrics, currently
> a value of 1 is passed which is incorrect. Rather than add more
> arguments to the bison parser, add runtime to the context. Fix call
> sites not to pass a value. The runtime value is defaulted to 0, which is
> arbitrary. In some places this replaces a value of 1, which was also
> arbitrary. This shouldn't affect anything other than PPC. The use of
> 0 or 1 shouldn't matter as a proper runtime value would be needed in a
> case that it did matter.
>
> Acked-by: Andi Kleen <ak@...ux.intel.com>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
Patch looks good to me.
Reviewed-by: Kajol Jain<kjain@...ux.ibm.com>
Thanks,
Kajol Jain
> ---
> tools/perf/tests/expr.c | 15 ++++++++-------
> tools/perf/tests/pmu-events.c | 10 +++++-----
> tools/perf/util/expr.c | 15 ++++++++-------
> tools/perf/util/expr.h | 5 +++--
> tools/perf/util/metricgroup.c | 7 +++----
> tools/perf/util/stat-shadow.c | 7 ++++---
> 6 files changed, 31 insertions(+), 28 deletions(-)
>
> diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
> index f1d8411fce12..3c16f3df1980 100644
> --- a/tools/perf/tests/expr.c
> +++ b/tools/perf/tests/expr.c
> @@ -56,7 +56,7 @@ static int test(struct expr_parse_ctx *ctx, const char *e, double val2)
> {
> double val;
>
> - if (expr__parse(&val, ctx, e, 1))
> + if (expr__parse(&val, ctx, e))
> TEST_ASSERT_VAL("parse test failed", 0);
> TEST_ASSERT_VAL("unexpected value", val == val2);
> return 0;
> @@ -104,17 +104,17 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
> }
>
> p = "FOO/0";
> - ret = expr__parse(&val, ctx, p, 1);
> + ret = expr__parse(&val, ctx, p);
> TEST_ASSERT_VAL("division by zero", ret == -1);
>
> p = "BAR/";
> - ret = expr__parse(&val, ctx, p, 1);
> + ret = expr__parse(&val, ctx, p);
> TEST_ASSERT_VAL("missing operand", ret == -1);
>
> expr__ctx_clear(ctx);
> TEST_ASSERT_VAL("find ids",
> expr__find_ids("FOO + BAR + BAZ + BOZO", "FOO",
> - ctx, 1) == 0);
> + ctx) == 0);
> TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 3);
> TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "BAR",
> (void **)&val_ptr));
> @@ -124,9 +124,10 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
> (void **)&val_ptr));
>
> expr__ctx_clear(ctx);
> + ctx->runtime = 3;
> TEST_ASSERT_VAL("find ids",
> expr__find_ids("EVENT1\\,param\\=?@ + EVENT2\\,param\\=?@",
> - NULL, ctx, 3) == 0);
> + NULL, ctx) == 0);
> TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 2);
> TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids, "EVENT1,param=3/",
> (void **)&val_ptr));
> @@ -137,7 +138,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
> expr__ctx_clear(ctx);
> TEST_ASSERT_VAL("find ids",
> expr__find_ids("EVENT1 if #smt_on else EVENT2",
> - NULL, ctx, 0) == 0);
> + NULL, ctx) == 0);
> TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 1);
> TEST_ASSERT_VAL("find ids", hashmap__find(ctx->ids,
> smt_on() ? "EVENT1" : "EVENT2",
> @@ -147,7 +148,7 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
> expr__ctx_clear(ctx);
> TEST_ASSERT_VAL("find ids",
> expr__find_ids("1.0 if EVENT1 > 100.0 else 1.0",
> - NULL, ctx, 0) == 0);
> + NULL, ctx) == 0);
> TEST_ASSERT_VAL("find ids", hashmap__size(ctx->ids) == 0);
>
> expr__ctx_free(ctx);
> diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
> index cc5cea141beb..71b08c296410 100644
> --- a/tools/perf/tests/pmu-events.c
> +++ b/tools/perf/tests/pmu-events.c
> @@ -866,7 +866,7 @@ static int resolve_metric_simple(struct expr_parse_ctx *pctx,
> ref->metric_expr = pe->metric_expr;
> list_add_tail(&metric->list, compound_list);
>
> - rc = expr__find_ids(pe->metric_expr, NULL, pctx, 0);
> + rc = expr__find_ids(pe->metric_expr, NULL, pctx);
> if (rc)
> goto out_err;
> break; /* The hashmap has been modified, so restart */
> @@ -916,7 +916,7 @@ static int test_parsing(void)
> if (!pe->metric_expr)
> continue;
> expr__ctx_clear(ctx);
> - if (expr__find_ids(pe->metric_expr, NULL, ctx, 0) < 0) {
> + if (expr__find_ids(pe->metric_expr, NULL, ctx) < 0) {
> expr_failure("Parse find ids failed", map, pe);
> ret++;
> continue;
> @@ -949,7 +949,7 @@ static int test_parsing(void)
> free(metric);
> }
>
> - if (expr__parse(&result, ctx, pe->metric_expr, 0)) {
> + if (expr__parse(&result, ctx, pe->metric_expr)) {
> expr_failure("Parse failed", map, pe);
> ret++;
> }
> @@ -989,7 +989,7 @@ static int metric_parse_fake(const char *str)
> pr_debug("expr__ctx_new failed");
> return TEST_FAIL;
> }
> - if (expr__find_ids(str, NULL, ctx, 0) < 0) {
> + if (expr__find_ids(str, NULL, ctx) < 0) {
> pr_err("expr__find_ids failed\n");
> return -1;
> }
> @@ -1010,7 +1010,7 @@ static int metric_parse_fake(const char *str)
> }
> }
>
> - if (expr__parse(&result, ctx, str, 0))
> + if (expr__parse(&result, ctx, str))
> pr_err("expr__parse failed\n");
> else
> ret = 0;
> diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> index db2445677c8c..62fb39fd4d9d 100644
> --- a/tools/perf/util/expr.c
> +++ b/tools/perf/util/expr.c
> @@ -246,7 +246,7 @@ int expr__resolve_id(struct expr_parse_ctx *ctx, const char *id,
> data->ref.metric_name);
> pr_debug("processing metric: %s ENTRY\n", id);
> data->kind = EXPR_ID_DATA__REF_VALUE;
> - if (expr__parse(&data->ref.val, ctx, data->ref.metric_expr, 1)) {
> + if (expr__parse(&data->ref.val, ctx, data->ref.metric_expr)) {
> pr_debug("%s failed to count\n", id);
> return -1;
> }
> @@ -284,6 +284,7 @@ struct expr_parse_ctx *expr__ctx_new(void)
>
> ctx->ids = hashmap__new(key_hash, key_equal, NULL);
> ctx->parent = NULL;
> + ctx->runtime = 0;
> return ctx;
> }
>
> @@ -314,10 +315,10 @@ void expr__ctx_free(struct expr_parse_ctx *ctx)
>
> static int
> __expr__parse(double *val, struct expr_parse_ctx *ctx, const char *expr,
> - bool compute_ids, int runtime)
> + bool compute_ids)
> {
> struct expr_scanner_ctx scanner_ctx = {
> - .runtime = runtime,
> + .runtime = ctx->runtime,
> };
> YY_BUFFER_STATE buffer;
> void *scanner;
> @@ -345,15 +346,15 @@ __expr__parse(double *val, struct expr_parse_ctx *ctx, const char *expr,
> }
>
> int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
> - const char *expr, int runtime)
> + const char *expr)
> {
> - return __expr__parse(final_val, ctx, expr, /*compute_ids=*/false, runtime) ? -1 : 0;
> + return __expr__parse(final_val, ctx, expr, /*compute_ids=*/false) ? -1 : 0;
> }
>
> int expr__find_ids(const char *expr, const char *one,
> - struct expr_parse_ctx *ctx, int runtime)
> + struct expr_parse_ctx *ctx)
> {
> - int ret = __expr__parse(NULL, ctx, expr, /*compute_ids=*/true, runtime);
> + int ret = __expr__parse(NULL, ctx, expr, /*compute_ids=*/true);
>
> if (one)
> expr__del_id(ctx, one);
> diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> index b20513f0ae59..124475a4f245 100644
> --- a/tools/perf/util/expr.h
> +++ b/tools/perf/util/expr.h
> @@ -21,6 +21,7 @@ struct expr_id {
> struct expr_parse_ctx {
> struct hashmap *ids;
> struct expr_id *parent;
> + int runtime;
> };
>
> struct expr_id_data;
> @@ -52,10 +53,10 @@ int expr__resolve_id(struct expr_parse_ctx *ctx, const char *id,
> struct expr_id_data **datap);
>
> int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
> - const char *expr, int runtime);
> + const char *expr);
>
> int expr__find_ids(const char *expr, const char *one,
> - struct expr_parse_ctx *ids, int runtime);
> + struct expr_parse_ctx *ids);
>
> double expr_id_data__value(const struct expr_id_data *data);
> struct expr_id *expr_id_data__parent(struct expr_id_data *data);
> diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
> index b60ccbbf0829..139f4a793f92 100644
> --- a/tools/perf/util/metricgroup.c
> +++ b/tools/perf/util/metricgroup.c
> @@ -124,7 +124,6 @@ struct metric {
> const char *metric_unit;
> struct list_head metric_refs;
> int metric_refs_cnt;
> - int runtime;
> bool has_constraint;
> };
>
> @@ -391,7 +390,7 @@ static int metricgroup__setup_events(struct list_head *groups,
> expr->metric_name = m->metric_name;
> expr->metric_unit = m->metric_unit;
> expr->metric_events = metric_events;
> - expr->runtime = m->runtime;
> + expr->runtime = m->pctx->runtime;
> list_add(&expr->nd, &me->head);
> }
>
> @@ -812,7 +811,7 @@ static int __add_metric(struct list_head *metric_list,
> m->metric_name = pe->metric_name;
> m->metric_expr = pe->metric_expr;
> m->metric_unit = pe->unit;
> - m->runtime = runtime;
> + 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;
> @@ -862,7 +861,7 @@ static int __add_metric(struct list_head *metric_list,
> * For both the parent and referenced metrics, we parse
> * all the metric's IDs and add it to the parent context.
> */
> - if (expr__find_ids(pe->metric_expr, NULL, m->pctx, runtime) < 0) {
> + if (expr__find_ids(pe->metric_expr, NULL, m->pctx) < 0) {
> if (m->metric_refs_cnt == 0) {
> expr__ctx_free(m->pctx);
> free(m);
> diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
> index 9bc841e09a0c..20f1b9d0f272 100644
> --- a/tools/perf/util/stat-shadow.c
> +++ b/tools/perf/util/stat-shadow.c
> @@ -394,7 +394,7 @@ void perf_stat__collect_metric_expr(struct evlist *evsel_list)
> if (!metric_events) {
> if (expr__find_ids(counter->metric_expr,
> counter->name,
> - ctx, 1) < 0)
> + ctx) < 0)
> continue;
>
> metric_events = calloc(sizeof(struct evsel *),
> @@ -894,13 +894,14 @@ static void generic_metric(struct perf_stat_config *config,
> if (!pctx)
> return;
>
> + pctx->runtime = runtime;
> i = prepare_metric(metric_events, metric_refs, pctx, cpu, st);
> if (i < 0) {
> expr__ctx_free(pctx);
> return;
> }
> if (!metric_events[i]) {
> - if (expr__parse(&ratio, pctx, metric_expr, runtime) == 0) {
> + if (expr__parse(&ratio, pctx, metric_expr) == 0) {
> char *unit;
> char metric_bf[64];
>
> @@ -951,7 +952,7 @@ double test_generic_metric(struct metric_expr *mexp, int cpu, struct runtime_sta
> if (prepare_metric(mexp->metric_events, mexp->metric_refs, pctx, cpu, st) < 0)
> goto out;
>
> - if (expr__parse(&ratio, pctx, mexp->metric_expr, 1))
> + if (expr__parse(&ratio, pctx, mexp->metric_expr))
> ratio = 0.0;
>
> out:
>
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