From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:50015) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QocAu-0001Jl-PU for qemu-devel@nongnu.org; Wed, 03 Aug 2011 10:12:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QocAt-0007lz-9A for qemu-devel@nongnu.org; Wed, 03 Aug 2011 10:11:56 -0400 Received: from mx1.redhat.com ([209.132.183.28]:11094) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QocAs-0007lZ-Pa for qemu-devel@nongnu.org; Wed, 03 Aug 2011 10:11:55 -0400 From: Kevin Wolf Date: Wed, 3 Aug 2011 16:14:14 +0200 Message-Id: <1312380864-15605-20-git-send-email-kwolf@redhat.com> In-Reply-To: <1312380864-15605-1-git-send-email-kwolf@redhat.com> References: <1312380864-15605-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH 19/29] coroutine: add test-coroutine --benchmark-lifecycle List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: anthony@codemonkey.ws Cc: kwolf@redhat.com, qemu-devel@nongnu.org From: Stefan Hajnoczi 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 --- 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(); } -- 1.7.6