tools/perf: Add required memory barriers

[~andy/linux] / tools / perf / util / evlist.h

diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 880d7139d2fb3fce78d75b8e701251827045588e..ecaa582f40e265b5022c35075da162464df538d2 100644 (file)
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -21,7 +21,7 @@ struct perf_mmap {
        void             *base;
        int              mask;
        unsigned int     prev;
-       union perf_event event_copy;
+       char             event_copy[PERF_SAMPLE_MAX_SIZE];
 };
 
 struct perf_evlist {
@@ -31,7 +31,7 @@ struct perf_evlist {
        int              nr_groups;
        int              nr_fds;
        int              nr_mmaps;
-       int              mmap_len;
+       size_t           mmap_len;
        int              id_pos;
        int              is_pos;
        u64              combined_sample_type;
@@ -53,6 +53,7 @@ struct perf_evsel_str_handler {
 };
 
 struct perf_evlist *perf_evlist__new(void);
+struct perf_evlist *perf_evlist__new_default(void);
 void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus,
                       struct thread_map *threads);
 void perf_evlist__exit(struct perf_evlist *evlist);
@@ -87,7 +88,9 @@ struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);
 
 struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
 
-union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);
+union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx);
+
+void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx);
 
 int perf_evlist__open(struct perf_evlist *evlist);
 void perf_evlist__close(struct perf_evlist *evlist);
@@ -96,6 +99,7 @@ void perf_evlist__set_id_pos(struct perf_evlist *evlist);
 bool perf_can_sample_identifier(void);
 void perf_evlist__config(struct perf_evlist *evlist,
                         struct perf_record_opts *opts);
+int perf_record_opts__config(struct perf_record_opts *opts);
 
 int perf_evlist__prepare_workload(struct perf_evlist *evlist,
                                  struct perf_target *target,
@@ -103,6 +107,10 @@ int perf_evlist__prepare_workload(struct perf_evlist *evlist,
                                  bool want_signal);
 int perf_evlist__start_workload(struct perf_evlist *evlist);
 
+int perf_evlist__parse_mmap_pages(const struct option *opt,
+                                 const char *str,
+                                 int unset);
+
 int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
                      bool overwrite);
 void perf_evlist__munmap(struct perf_evlist *evlist);
@@ -163,10 +171,13 @@ static inline struct perf_evsel *perf_evlist__last(struct perf_evlist *evlist)
 
 size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp);
 
+int perf_evlist__strerror_tp(struct perf_evlist *evlist, int err, char *buf, size_t size);
+int perf_evlist__strerror_open(struct perf_evlist *evlist, int err, char *buf, size_t size);
+
 static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
 {
        struct perf_event_mmap_page *pc = mm->base;
-       int head = pc->data_head;
+       int head = ACCESS_ONCE(pc->data_head);
        rmb();
        return head;
 }
@@ -179,7 +190,7 @@ static inline void perf_mmap__write_tail(struct perf_mmap *md,
        /*
         * ensure all reads are done before we write the tail out.
         */
-       /* mb(); */
+       mb();
        pc->data_tail = tail;
 }