perf tools: Add event_update event unit type

Adding unit type 'event update' event, that stores/transfer events unit
name. The unit name is part of the perf stat output data.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-22-git-send-email-jolsa@kernel.org
[ Rename __alloc() to __new() for consistency ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index fc02931..614899b 100644 (file)
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -36,6 +36,7 @@ perf-y += bpf.o
 perf-y += topology.o
 perf-y += cpumap.o
 perf-y += stat.o
+perf-y += event_update.o
 
 $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
        $(call rule_mkdir)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 6a35198..f2b1dca 100644 (file)
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -200,6 +200,10 @@ static struct test generic_tests[] = {
                .func = test__synthesize_stat_round,
        },
        {
+               .desc = "Test attr update synthesize",
+               .func = test__event_update,
+       },
+       {
                .func = NULL,
        },
 };

diff --git a/tools/perf/tests/event_update.c b/tools/perf/tests/event_update.c
new file mode 100644 (file)
index 0000000..9cdf4c9
--- /dev/null
+++ b/tools/perf/tests/event_update.c
@@ -0,0 +1,42 @@
+#include <linux/compiler.h>
+#include "evlist.h"
+#include "evsel.h"
+#include "machine.h"
+#include "tests.h"
+#include "debug.h"
+
+static int process_event_unit(struct perf_tool *tool __maybe_unused,
+                             union perf_event *event,
+                             struct perf_sample *sample __maybe_unused,
+                             struct machine *machine __maybe_unused)
+{
+       struct event_update_event *ev = (struct event_update_event *) event;
+
+       TEST_ASSERT_VAL("wrong id", ev->id == 123);
+       TEST_ASSERT_VAL("wrong id", ev->type == PERF_EVENT_UPDATE__UNIT);
+       TEST_ASSERT_VAL("wrong unit", !strcmp(ev->data, "KRAVA"));
+       return 0;
+}
+
+int test__event_update(int subtest __maybe_unused)
+{
+       struct perf_evlist *evlist;
+       struct perf_evsel *evsel;
+
+       evlist = perf_evlist__new_default();
+       TEST_ASSERT_VAL("failed to get evlist", evlist);
+
+       evsel = perf_evlist__first(evlist);
+
+       TEST_ASSERT_VAL("failed to allos ids",
+                       !perf_evsel__alloc_id(evsel, 1, 1));
+
+       perf_evlist__id_add(evlist, evsel, 0, 0, 123);
+
+       evsel->unit = strdup("KRAVA");
+
+       TEST_ASSERT_VAL("failed to synthesize attr update unit",
+                       !perf_event__synthesize_event_update_unit(NULL, evsel, process_event_unit));
+
+       return 0;
+}

diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index a82ab9c..82b2b5e 100644 (file)
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -84,6 +84,7 @@ int test__cpu_map_synthesize(int subtest);
 int test__synthesize_stat_config(int subtest);
 int test__synthesize_stat(int subtest);
 int test__synthesize_stat_round(int subtest);
+int test__event_update(int subtest);
 
 #if defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWARF_UNWIND_SUPPORT

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 6966a4b..64c4cdf 100644 (file)
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -308,6 +308,10 @@ struct attr_event {
        u64 id[];
 };
 
+enum {
+       PERF_EVENT_UPDATE__UNIT  = 0,
+};
+
 struct event_update_event {
        struct perf_event_header header;
        u64 type;

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 6b4e002..5759ebf 100644 (file)
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2686,6 +2686,43 @@ int perf_event__synthesize_attr(struct perf_tool *tool,
        return err;
 }
 
+static struct event_update_event *
+event_update_event__new(size_t size, u64 type, u64 id)
+{
+       struct event_update_event *ev;
+
+       size += sizeof(*ev);
+       size  = PERF_ALIGN(size, sizeof(u64));
+
+       ev = zalloc(size);
+       if (ev) {
+               ev->header.type = PERF_RECORD_EVENT_UPDATE;
+               ev->header.size = (u16)size;
+               ev->type = type;
+               ev->id = id;
+       }
+       return ev;
+}
+
+int
+perf_event__synthesize_event_update_unit(struct perf_tool *tool,
+                                        struct perf_evsel *evsel,
+                                        perf_event__handler_t process)
+{
+       struct event_update_event *ev;
+       size_t size = strlen(evsel->unit);
+       int err;
+
+       ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]);
+       if (ev == NULL)
+               return -ENOMEM;
+
+       strncpy(ev->data, evsel->unit, size);
+       err = process(tool, (union perf_event *)ev, NULL, NULL);
+       free(ev);
+       return err;
+}
+
 int perf_event__synthesize_attrs(struct perf_tool *tool,
                                   struct perf_session *session,
                                   perf_event__handler_t process)
@@ -2762,6 +2799,13 @@ int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
        if (evsel == NULL)
                return -EINVAL;
 
+       switch (ev->type) {
+       case PERF_EVENT_UPDATE__UNIT:
+               evsel->unit = strdup(ev->data);
+       default:
+               break;
+       }
+
        return 0;
 }
 

diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 1e843c6..6aa2b92 100644 (file)
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -105,6 +105,9 @@ int perf_event__synthesize_attr(struct perf_tool *tool,
 int perf_event__synthesize_attrs(struct perf_tool *tool,
                                 struct perf_session *session,
                                 perf_event__handler_t process);
+int perf_event__synthesize_event_update_unit(struct perf_tool *tool,
+                                            struct perf_evsel *evsel,
+                                            perf_event__handler_t process);
 int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
                             struct perf_evlist **pevlist);
 int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,