ring-buffer: Add multiple iterations between benchmark timestamps

[net-next-2.6.git] / kernel / trace / ring_buffer_benchmark.c

diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index 573d3cc762c3ece15d74558691d8e018070c5c99..70df73e4ff212ffaf4c4a9c92ad7540369c2ff31 100644 (file)
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -35,6 +35,10 @@ static int disable_reader;
 module_param(disable_reader, uint, 0644);
 MODULE_PARM_DESC(disable_reader, "only run producer");
 
+static int write_iteration = 50;
+module_param(write_iteration, uint, 0644);
+MODULE_PARM_DESC(write_iteration, "# of writes between timestamp readings");
+
 static int read_events;
 
 static int kill_test;
@@ -208,15 +212,18 @@ static void ring_buffer_producer(void)
        do {
                struct ring_buffer_event *event;
                int *entry;
-
-               event = ring_buffer_lock_reserve(buffer, 10);
-               if (!event) {
-                       missed++;
-               } else {
-                       hit++;
-                       entry = ring_buffer_event_data(event);
-                       *entry = smp_processor_id();
-                       ring_buffer_unlock_commit(buffer, event);
+               int i;
+
+               for (i = 0; i < write_iteration; i++) {
+                       event = ring_buffer_lock_reserve(buffer, 10);
+                       if (!event) {
+                               missed++;
+                       } else {
+                               hit++;
+                               entry = ring_buffer_event_data(event);
+                               *entry = smp_processor_id();
+                               ring_buffer_unlock_commit(buffer, event);
+                       }
                }
                do_gettimeofday(&end_tv);