perf parse-events: Support event alias in form foo-bar-baz

Event aliasing for events whose name in the form foo-bar-baz is not
supported, while foo-bar, foo_bar_baz, and other combinations are, i.e.
two hyphens are not supported.

The HiSilicon D06 platform has events in such form:

  $ ./perf list sdir-home-migrate

  List of pre-defined events (to be used in -e):

  uncore hha:
    sdir-home-migrate
   [Unit: hisi_sccl,hha]

  $ sudo ./perf stat -e sdir-home-migrate
  event syntax error: 'sdir-home-migrate'
                          \___ parser error
  Run 'perf list' for a list of valid events

   Usage: perf stat [<options>] [<command>]

   -e, --event <event>event selector. use 'perf list' to list available events

To support, add an extra PMU event symbol type for "baz", and add a new
rule in the bison file.

Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qi Liu <liuqi115@huawei.com>
Cc: Shaokun Zhang <zhangshaokun@hisilicon.com>
Cc: linuxarm@huawei.com
Link: https://lore.kernel.org/r/1642432215-234089-2-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index acf20ce..879f606 100644 (file)
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -2098,8 +2098,17 @@ static void perf_pmu__parse_init(void)
        pmu = NULL;
        while ((pmu = perf_pmu__scan(pmu)) != NULL) {
                list_for_each_entry(alias, &pmu->aliases, list) {
-                       if (strchr(alias->name, '-'))
+                       char *tmp = strchr(alias->name, '-');
+
+                       if (tmp) {
+                               char *tmp2 = NULL;
+
+                               tmp2 = strchr(tmp + 1, '-');
                                len++;
+                               if (tmp2)
+                                       len++;
+                       }
+
                        len++;
                }
        }
@@ -2119,8 +2128,20 @@ static void perf_pmu__parse_init(void)
                list_for_each_entry(alias, &pmu->aliases, list) {
                        struct perf_pmu_event_symbol *p = perf_pmu_events_list + len;
                        char *tmp = strchr(alias->name, '-');
+                       char *tmp2 = NULL;
 
-                       if (tmp != NULL) {
+                       if (tmp)
+                               tmp2 = strchr(tmp + 1, '-');
+                       if (tmp2) {
+                               SET_SYMBOL(strndup(alias->name, tmp - alias->name),
+                                               PMU_EVENT_SYMBOL_PREFIX);
+                               p++;
+                               tmp++;
+                               SET_SYMBOL(strndup(tmp, tmp2 - tmp), PMU_EVENT_SYMBOL_SUFFIX);
+                               p++;
+                               SET_SYMBOL(strdup(++tmp2), PMU_EVENT_SYMBOL_SUFFIX2);
+                               len += 3;
+                       } else if (tmp) {
                                SET_SYMBOL(strndup(alias->name, tmp - alias->name),
                                                PMU_EVENT_SYMBOL_PREFIX);
                                p++;

diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index c7fc93f..a38b8b1 100644 (file)
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -53,6 +53,7 @@ enum perf_pmu_event_symbol_type {
        PMU_EVENT_SYMBOL,               /* normal style PMU event */
        PMU_EVENT_SYMBOL_PREFIX,        /* prefix of pre-suf style event */
        PMU_EVENT_SYMBOL_SUFFIX,        /* suffix of pre-suf style event */
+       PMU_EVENT_SYMBOL_SUFFIX2,       /* suffix of pre-suf2 style event */
 };
 
 struct perf_pmu_event_symbol {

diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 4efe987..5b6e4b5 100644 (file)
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -149,6 +149,8 @@ static int pmu_str_check(yyscan_t scanner, struct parse_events_state *parse_stat
                        return PE_PMU_EVENT_PRE;
                case PMU_EVENT_SYMBOL_SUFFIX:
                        return PE_PMU_EVENT_SUF;
+               case PMU_EVENT_SYMBOL_SUFFIX2:
+                       return PE_PMU_EVENT_SUF2;
                case PMU_EVENT_SYMBOL:
                        return parse_state->fake_pmu
                                ? PE_PMU_EVENT_FAKE : PE_KERNEL_PMU_EVENT;

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index 1741589..be8c517 100644 (file)
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -69,7 +69,7 @@ static void inc_group_count(struct list_head *list,
 %token PE_NAME_CACHE_TYPE PE_NAME_CACHE_OP_RESULT
 %token PE_PREFIX_MEM PE_PREFIX_RAW PE_PREFIX_GROUP
 %token PE_ERROR
-%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
+%token PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_PMU_EVENT_SUF2 PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
 %token PE_ARRAY_ALL PE_ARRAY_RANGE
 %token PE_DRV_CFG_TERM
 %type <num> PE_VALUE
@@ -87,7 +87,7 @@ static void inc_group_count(struct list_head *list,
 %type <str> PE_MODIFIER_EVENT
 %type <str> PE_MODIFIER_BP
 %type <str> PE_EVENT_NAME
-%type <str> PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
+%type <str> PE_PMU_EVENT_PRE PE_PMU_EVENT_SUF PE_PMU_EVENT_SUF2 PE_KERNEL_PMU_EVENT PE_PMU_EVENT_FAKE
 %type <str> PE_DRV_CFG_TERM
 %type <str> event_pmu_name
 %destructor { free ($$); } <str>
@@ -372,6 +372,19 @@ PE_KERNEL_PMU_EVENT opt_pmu_config
        $$ = list;
 }
 |
+PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF '-' PE_PMU_EVENT_SUF2 sep_dc
+{
+       struct list_head *list;
+       char pmu_name[128];
+       snprintf(pmu_name, sizeof(pmu_name), "%s-%s-%s", $1, $3, $5);
+       free($1);
+       free($3);
+       free($5);
+       if (parse_events_multi_pmu_add(_parse_state, pmu_name, NULL, &list) < 0)
+               YYABORT;
+       $$ = list;
+}
+|
 PE_PMU_EVENT_PRE '-' PE_PMU_EVENT_SUF sep_dc
 {
        struct list_head *list;