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authorStefan Hajnoczi <stefanha@linux.vnet.ibm.com>2011-05-12 08:27:39 +0100
committerKevin Wolf <kwolf@redhat.com>2011-08-02 15:53:40 +0200
commit5e3840ce24040cbd1957008489cbc136c43ca391 (patch)
tree22ee331833fc285b99da325790c0edc418ab0aa7 /test-coroutine.c
parentaa7ee42ed3b2c196de9f390fc9a5e339dd7417e3 (diff)
coroutine: add test-coroutine --benchmark-lifecycle
Add a microbenchmark for coroutine create, enter, and return (aka lifecycle). This is a useful benchmark because users are expected to create many coroutines, one per I/O request for example, and we therefore need to provide good performance in that scenario. To run: make test-coroutine ./test-coroutine --benchmark-lifecycle 20000000 This will do 20,000,000 coroutine create, enter, return iterations and print the resulting time. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Diffstat (limited to 'test-coroutine.c')
-rw-r--r--test-coroutine.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/test-coroutine.c b/test-coroutine.c
index 9e9d3c95bc..bf9f3e91b5 100644
--- a/test-coroutine.c
+++ b/test-coroutine.c
@@ -150,6 +150,33 @@ static void test_lifecycle(void)
g_assert(done); /* expect done to be true (second time) */
}
+/*
+ * Lifecycle benchmark
+ */
+
+static void coroutine_fn empty_coroutine(void *opaque)
+{
+ /* Do nothing */
+}
+
+static void perf_lifecycle(void)
+{
+ Coroutine *coroutine;
+ unsigned int i, max;
+ double duration;
+
+ max = 1000000;
+
+ g_test_timer_start();
+ for (i = 0; i < max; i++) {
+ coroutine = qemu_coroutine_create(empty_coroutine);
+ qemu_coroutine_enter(coroutine, NULL);
+ }
+ duration = g_test_timer_elapsed();
+
+ g_test_message("Lifecycle %u iterations: %f s\n", max, duration);
+}
+
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
@@ -158,5 +185,8 @@ int main(int argc, char **argv)
g_test_add_func("/basic/nesting", test_nesting);
g_test_add_func("/basic/self", test_self);
g_test_add_func("/basic/in_coroutine", test_in_coroutine);
+ if (g_test_perf()) {
+ g_test_add_func("/perf/lifecycle", perf_lifecycle);
+ }
return g_test_run();
}