Commit 5e3840ce authored by Stefan Hajnoczi's avatar Stefan Hajnoczi Committed by Kevin Wolf
Browse files

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: default avatarStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
parent aa7ee42e

test-coroutine.c

+30 −0
Original line number Diff line number Diff line
@@ -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();

}