| Message ID | 1379430579-4739-1-git-send-email-gabriel@kerneis.info |
|---|---|
| State | New |
| Headers | show |
On Tue, Sep 17, 2013 at 05:09:39PM +0200, Gabriel Kerneis wrote: > Current coroutine performance benchmarks test only coroutine creation, > either directly or in a nested way. This patch adds a benchmark to > evaluate the performance of qemu_coroutine_yield. > > Signed-off-by: Gabriel Kerneis <gabriel@kerneis.info> > --- > tests/test-coroutine.c | 33 +++++++++++++++++++++++++++++++++ > 1 file changed, 33 insertions(+) scripts/checkpatch.pl picked up on the while( syntax. I added the space when merging the patch. Please run checkpatch.pl in the future. The easiest way is to enable it as a git-hook: http://blog.vmsplice.net/2011/03/how-to-automatically-run-checkpatchpl.html Thanks, applied to my block tree: https://github.com/stefanha/qemu/commits/block Stefan
diff --git a/tests/test-coroutine.c b/tests/test-coroutine.c index 39be046..f4f90ac 100644 --- a/tests/test-coroutine.c +++ b/tests/test-coroutine.c @@ -202,6 +202,38 @@ static void perf_nesting(void) maxcycles, maxnesting, duration); } +/* + * Yield benchmark + */ + +static void coroutine_fn yield_loop(void *opaque) +{ + unsigned int *counter = opaque; + + while((*counter) > 0) { + (*counter)--; + qemu_coroutine_yield(); + } +} + +static void perf_yield(void) +{ + unsigned int i, maxcycles; + double duration; + + maxcycles = 100000000; + i = maxcycles; + Coroutine *coroutine = qemu_coroutine_create(yield_loop); + + g_test_timer_start(); + while(i > 0) { + qemu_coroutine_enter(coroutine, &i); + } + duration = g_test_timer_elapsed(); + + g_test_message("Yield %u iterations: %f s\n", + maxcycles, duration); +} int main(int argc, char **argv) { @@ -214,6 +246,7 @@ int main(int argc, char **argv) if (g_test_perf()) { g_test_add_func("/perf/lifecycle", perf_lifecycle); g_test_add_func("/perf/nesting", perf_nesting); + g_test_add_func("/perf/yield", perf_yield); } return g_test_run(); }
Current coroutine performance benchmarks test only coroutine creation, either directly or in a nested way. This patch adds a benchmark to evaluate the performance of qemu_coroutine_yield. Signed-off-by: Gabriel Kerneis <gabriel@kerneis.info> --- tests/test-coroutine.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)