perf tools: Add report.queue-size config file option

Adding report.queue-size config file option to setup the maximum
allocation size for session's struct ordered_events object.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-lm42mbpu0cwljpyy8vw5y26n@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 18 insertions, 1 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index c72cc5a12144..041e93da13e4 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -58,17 +58,19 @@ struct report {
         const char              *symbol_filter_str;
         float                   min_percent;
         u64                     nr_entries;
+        u64                     queue_size;
         DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
 };
 
 static int report__config(const char *var, const char *value, void *cb)
 {
+        struct report *rep = cb;
+
         if (!strcmp(var, "report.group")) {
                 symbol_conf.event_group = perf_config_bool(var, value);
                 return 0;
         }
         if (!strcmp(var, "report.percent-limit")) {
-                struct report *rep = cb;
                 rep->min_percent = strtof(value, NULL);
                 return 0;
         }
@@ -76,6 +78,10 @@ static int report__config(const char *var, const char *value, void *cb)
                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
                 return 0;
         }
+        if (!strcmp(var, "report.queue-size")) {
+                rep->queue_size = perf_config_u64(var, value);
+                return 0;
+        }
 
         return perf_default_config(var, value, cb);
 }
@@ -714,6 +720,11 @@ repeat:
         if (session == NULL)
                 return -ENOMEM;
 
+        if (report.queue_size) {
+                ordered_events__set_alloc_size(&session->ordered_events,
+                                               report.queue_size);
+        }
+
         report.session = session;
 
         has_br_stack = perf_header__has_feat(&session->header,
diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
index 6036bd657073..2ce847fb48a5 100644
--- a/tools/perf/util/ordered-events.h
+++ b/tools/perf/util/ordered-events.h
@@ -40,4 +40,10 @@ int ordered_events__flush(struct perf_session *s, struct perf_tool *tool,
                           enum oe_flush how);
 void ordered_events__init(struct ordered_events *oe);
 void ordered_events__free(struct ordered_events *oe);
+
+static inline
+void ordered_events__set_alloc_size(struct ordered_events *oe, u64 size)
+{
+        oe->max_alloc_size = size;
+}
 #endif /* __ORDERED_EVENTS_H */