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 <stefa...@linux.vnet.ibm.com> --- test-coroutine.c | 30 ++++++++++++++++++++++++++++++ 1 files changed, 30 insertions(+), 0 deletions(-) diff --git a/test-coroutine.c b/test-coroutine.c index 9e9d3c9..bf9f3e9 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(); } -- 1.7.5.4