libperf: Add perf_evlist__set_maps() function

Move the evlist__set_maps() function from tools/perf to libperf.

Committer notes:

Fix up reject due to earlier inversion in calling perf_evlist__init().

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-57-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

14 files changed, 83 insertions, 67 deletions

diff --git a/tools/perf/arch/x86/tests/perf-time-to-tsc.c b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
index 261bdd680651..582182d98a7f 100644
--- a/tools/perf/arch/x86/tests/perf-time-to-tsc.c
+++ b/tools/perf/arch/x86/tests/perf-time-to-tsc.c
@@ -6,6 +6,7 @@
 #include <linux/types.h>
 #include <sys/prctl.h>
 #include <perf/cpumap.h>
+#include <perf/evlist.h>
 
 #include "parse-events.h"
 #include "evlist.h"
@@ -72,7 +73,7 @@ int test__perf_time_to_tsc(struct test *test __maybe_unused, int subtest __maybe
         evlist = evlist__new();
         CHECK_NOT_NULL__(evlist);
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         CHECK__(parse_events(evlist, "cycles:u", NULL));
 
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index a787c5cb1331..46fadbbe1c3e 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -48,6 +48,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <subcmd/pager.h>
+#include <perf/evlist.h>
 
 #include <linux/ctype.h>
 
@@ -3264,7 +3265,7 @@ static int set_maps(struct perf_script *script)
         if (WARN_ONCE(script->allocated, "stats double allocation\n"))
                 return -EINVAL;
 
-        perf_evlist__set_maps(evlist, script->cpus, script->threads);
+        perf_evlist__set_maps(&evlist->core, script->cpus, script->threads);
 
         if (perf_evlist__alloc_stats(evlist, true))
                 return -ENOMEM;
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 4a94ca131d56..14e4c970d16a 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -83,6 +83,7 @@
 #include <sys/resource.h>
 
 #include <linux/ctype.h>
+#include <perf/evlist.h>
 
 #define DEFAULT_SEPARATOR       " "
 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
@@ -1517,7 +1518,7 @@ static int set_maps(struct perf_stat *st)
         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
                 return -EINVAL;
 
-        perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
+        perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
 
         if (perf_evlist__alloc_stats(evsel_list, true))
                 return -ENOMEM;
diff --git a/tools/perf/lib/evlist.c b/tools/perf/lib/evlist.c
index 087ef76ea8fd..6a2308ef9868 100644
--- a/tools/perf/lib/evlist.c
+++ b/tools/perf/lib/evlist.c
@@ -5,6 +5,8 @@
 #include <internal/evsel.h>
 #include <linux/zalloc.h>
 #include <stdlib.h>
+#include <perf/cpumap.h>
+#include <perf/threadmap.h>
 
 void perf_evlist__init(struct perf_evlist *evlist)
 {
@@ -12,11 +14,39 @@ void perf_evlist__init(struct perf_evlist *evlist)
         evlist->nr_entries = 0;
 }
 
+static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
+                                          struct perf_evsel *evsel)
+{
+        /*
+         * We already have cpus for evsel (via PMU sysfs) so
+         * keep it, if there's no target cpu list defined.
+         */
+        if (!evsel->own_cpus || evlist->has_user_cpus) {
+                perf_cpu_map__put(evsel->cpus);
+                evsel->cpus = perf_cpu_map__get(evlist->cpus);
+        } else if (evsel->cpus != evsel->own_cpus) {
+                perf_cpu_map__put(evsel->cpus);
+                evsel->cpus = perf_cpu_map__get(evsel->own_cpus);
+        }
+
+        perf_thread_map__put(evsel->threads);
+        evsel->threads = perf_thread_map__get(evlist->threads);
+}
+
+static void perf_evlist__propagate_maps(struct perf_evlist *evlist)
+{
+        struct perf_evsel *evsel;
+
+        perf_evlist__for_each_evsel(evlist, evsel)
+                __perf_evlist__propagate_maps(evlist, evsel);
+}
+
 void perf_evlist__add(struct perf_evlist *evlist,
                       struct perf_evsel *evsel)
 {
         list_add_tail(&evsel->node, &evlist->entries);
         evlist->nr_entries += 1;
+        __perf_evlist__propagate_maps(evlist, evsel);
 }
 
 void perf_evlist__remove(struct perf_evlist *evlist,
@@ -60,3 +90,27 @@ void perf_evlist__delete(struct perf_evlist *evlist)
 {
         free(evlist);
 }
+
+void perf_evlist__set_maps(struct perf_evlist *evlist,
+                           struct perf_cpu_map *cpus,
+                           struct perf_thread_map *threads)
+{
+        /*
+         * Allow for the possibility that one or another of the maps isn't being
+         * changed i.e. don't put it.  Note we are assuming the maps that are
+         * being applied are brand new and evlist is taking ownership of the
+         * original reference count of 1.  If that is not the case it is up to
+         * the caller to increase the reference count.
+         */
+        if (cpus != evlist->cpus) {
+                perf_cpu_map__put(evlist->cpus);
+                evlist->cpus = perf_cpu_map__get(cpus);
+        }
+
+        if (threads != evlist->threads) {
+                perf_thread_map__put(evlist->threads);
+                evlist->threads = perf_thread_map__get(threads);
+        }
+
+        perf_evlist__propagate_maps(evlist);
+}
diff --git a/tools/perf/lib/include/perf/evlist.h b/tools/perf/lib/include/perf/evlist.h
index 9a126fd0773c..b1d8dee018d6 100644
--- a/tools/perf/lib/include/perf/evlist.h
+++ b/tools/perf/lib/include/perf/evlist.h
@@ -6,6 +6,8 @@
 
 struct perf_evlist;
 struct perf_evsel;
+struct perf_cpu_map;
+struct perf_thread_map;
 
 LIBPERF_API void perf_evlist__init(struct perf_evlist *evlist);
 LIBPERF_API void perf_evlist__add(struct perf_evlist *evlist,
@@ -22,4 +24,8 @@ LIBPERF_API struct perf_evsel* perf_evlist__next(struct perf_evlist *evlist,
              (pos) != NULL;                             \
              (pos) = perf_evlist__next((evlist), (pos)))
 
+LIBPERF_API void perf_evlist__set_maps(struct perf_evlist *evlist,
+                                       struct perf_cpu_map *cpus,
+                                       struct perf_thread_map *threads);
+
 #endif /* __LIBPERF_EVLIST_H */
diff --git a/tools/perf/lib/libperf.map b/tools/perf/lib/libperf.map
index 28ed04cbd223..9b6e8f165014 100644
--- a/tools/perf/lib/libperf.map
+++ b/tools/perf/lib/libperf.map
@@ -20,6 +20,7 @@ LIBPERF_0.0.1 {
                 perf_evlist__add;
                 perf_evlist__remove;
                 perf_evlist__next;
+                perf_evlist__set_maps;
         local:
                 *;
 };
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index bfaf22c2023c..e45df0736261 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -9,6 +9,7 @@
 #include <string.h>
 #include <sys/param.h>
 #include <perf/cpumap.h>
+#include <perf/evlist.h>
 
 #include "parse-events.h"
 #include "evlist.h"
@@ -629,7 +630,7 @@ static int do_test_code_reading(bool try_kcore)
                         goto out_put;
                 }
 
-                perf_evlist__set_maps(evlist, cpus, threads);
+                perf_evlist__set_maps(&evlist->core, cpus, threads);
 
                 str = do_determine_event(excl_kernel);
                 pr_debug("Parsing event '%s'\n", str);
@@ -658,7 +659,7 @@ static int do_test_code_reading(bool try_kcore)
                                  */
                                 perf_cpu_map__get(cpus);
                                 perf_thread_map__get(threads);
-                                perf_evlist__set_maps(evlist, NULL, NULL);
+                                perf_evlist__set_maps(&evlist->core, NULL, NULL);
                                 evlist__delete(evlist);
                                 evlist = NULL;
                                 continue;
diff --git a/tools/perf/tests/keep-tracking.c b/tools/perf/tests/keep-tracking.c
index 46478ba1ed16..0ce5ce33bac4 100644
--- a/tools/perf/tests/keep-tracking.c
+++ b/tools/perf/tests/keep-tracking.c
@@ -3,6 +3,7 @@
 #include <unistd.h>
 #include <sys/prctl.h>
 #include <perf/cpumap.h>
+#include <perf/evlist.h>
 
 #include "parse-events.h"
 #include "evlist.h"
@@ -82,7 +83,7 @@ int test__keep_tracking(struct test *test __maybe_unused, int subtest __maybe_un
         evlist = evlist__new();
         CHECK_NOT_NULL__(evlist);
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         CHECK__(parse_events(evlist, "dummy:u", NULL));
         CHECK__(parse_events(evlist, "cycles:u", NULL));
diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index aa792aebd7f0..7327694fbde0 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -12,6 +12,7 @@
 #include "tests.h"
 #include <linux/err.h>
 #include <linux/kernel.h>
+#include <perf/evlist.h>
 
 /*
  * This test will generate random numbers of calls to some getpid syscalls,
@@ -68,7 +69,7 @@ int test__basic_mmap(struct test *test __maybe_unused, int subtest __maybe_unuse
                 goto out_free_cpus;
         }
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         for (i = 0; i < nsyscalls; ++i) {
                 char name[64];
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 2decda2d4c17..c5f1a9f83380 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -11,6 +11,7 @@
 #include "util/evlist.h"
 #include "util/cpumap.h"
 #include "util/thread_map.h"
+#include <perf/evlist.h>
 
 #define NR_LOOPS  10000000
 
@@ -64,7 +65,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
                 goto out_free_maps;
         }
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         cpus    = NULL;
         threads = NULL;
diff --git a/tools/perf/tests/switch-tracking.c b/tools/perf/tests/switch-tracking.c
index 9e0bbea15005..e3cee69f6ea2 100644
--- a/tools/perf/tests/switch-tracking.c
+++ b/tools/perf/tests/switch-tracking.c
@@ -6,6 +6,7 @@
 #include <stdlib.h>
 #include <linux/zalloc.h>
 #include <perf/cpumap.h>
+#include <perf/evlist.h>
 
 #include "parse-events.h"
 #include "evlist.h"
@@ -354,7 +355,7 @@ int test__switch_tracking(struct test *test __maybe_unused, int subtest __maybe_
                 goto out_err;
         }
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         /* First event */
         err = parse_events(evlist, "cpu-clock:u", NULL);
diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index b0192ea636a7..4ca38fd0379a 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -7,6 +7,7 @@
 
 #include <errno.h>
 #include <signal.h>
+#include <perf/evlist.h>
 
 static int exited;
 static int nr_exit;
@@ -71,7 +72,7 @@ int test__task_exit(struct test *test __maybe_unused, int subtest __maybe_unused
                 goto out_free_maps;
         }
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         cpus    = NULL;
         threads = NULL;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 1a6f877ebb03..4433b656cfb7 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -51,7 +51,7 @@ void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus,
         for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
                 INIT_HLIST_HEAD(&evlist->heads[i]);
         perf_evlist__init(&evlist->core);
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
         fdarray__init(&evlist->pollfd, 64);
         evlist->workload.pid = -1;
         evlist->bkw_mmap_state = BKW_MMAP_NOTREADY;
@@ -152,33 +152,6 @@ void evlist__delete(struct evlist *evlist)
         free(evlist);
 }
 
-static void __perf_evlist__propagate_maps(struct evlist *evlist,
-                                          struct evsel *evsel)
-{
-        /*
-         * We already have cpus for evsel (via PMU sysfs) so
-         * keep it, if there's no target cpu list defined.
-         */
-        if (!evsel->core.own_cpus || evlist->core.has_user_cpus) {
-                perf_cpu_map__put(evsel->core.cpus);
-                evsel->core.cpus = perf_cpu_map__get(evlist->core.cpus);
-        } else if (evsel->core.cpus != evsel->core.own_cpus) {
-                perf_cpu_map__put(evsel->core.cpus);
-                evsel->core.cpus = perf_cpu_map__get(evsel->core.own_cpus);
-        }
-
-        perf_thread_map__put(evsel->core.threads);
-        evsel->core.threads = perf_thread_map__get(evlist->core.threads);
-}
-
-static void perf_evlist__propagate_maps(struct evlist *evlist)
-{
-        struct evsel *evsel;
-
-        evlist__for_each_entry(evlist, evsel)
-                __perf_evlist__propagate_maps(evlist, evsel);
-}
-
 void evlist__add(struct evlist *evlist, struct evsel *entry)
 {
         entry->evlist = evlist;
@@ -189,8 +162,6 @@ void evlist__add(struct evlist *evlist, struct evsel *entry)
 
         if (evlist->core.nr_entries == 1)
                 perf_evlist__set_id_pos(evlist);
-
-        __perf_evlist__propagate_maps(evlist, entry);
 }
 
 void evlist__remove(struct evlist *evlist, struct evsel *evsel)
@@ -1097,7 +1068,7 @@ int perf_evlist__create_maps(struct evlist *evlist, struct target *target)
 
         evlist->core.has_user_cpus = !!target->cpu_list;
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 
         return 0;
 
@@ -1106,29 +1077,6 @@ out_delete_threads:
         return -1;
 }
 
-void perf_evlist__set_maps(struct evlist *evlist, struct perf_cpu_map *cpus,
-                           struct perf_thread_map *threads)
-{
-        /*
-         * Allow for the possibility that one or another of the maps isn't being
-         * changed i.e. don't put it.  Note we are assuming the maps that are
-         * being applied are brand new and evlist is taking ownership of the
-         * original reference count of 1.  If that is not the case it is up to
-         * the caller to increase the reference count.
-         */
-        if (cpus != evlist->core.cpus) {
-                perf_cpu_map__put(evlist->core.cpus);
-                evlist->core.cpus = perf_cpu_map__get(cpus);
-        }
-
-        if (threads != evlist->core.threads) {
-                perf_thread_map__put(evlist->core.threads);
-                evlist->core.threads = perf_thread_map__get(threads);
-        }
-
-        perf_evlist__propagate_maps(evlist);
-}
-
 void __perf_evlist__set_sample_bit(struct evlist *evlist,
                                    enum perf_event_sample_format bit)
 {
@@ -1381,7 +1329,7 @@ static int perf_evlist__create_syswide_maps(struct evlist *evlist)
         if (!threads)
                 goto out_put;
 
-        perf_evlist__set_maps(evlist, cpus, threads);
+        perf_evlist__set_maps(&evlist->core, cpus, threads);
 out:
         return err;
 out_put:
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index de2025d198d4..e31ddcc058f2 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -191,8 +191,6 @@ int perf_evlist__enable_event_idx(struct evlist *evlist,
 void perf_evlist__set_selected(struct evlist *evlist,
                                struct evsel *evsel);
 
-void perf_evlist__set_maps(struct evlist *evlist, struct perf_cpu_map *cpus,
-                           struct perf_thread_map *threads);
 int perf_evlist__create_maps(struct evlist *evlist, struct target *target);
 int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel);