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[Qemu-devel] [PULL 06/11] coroutine: add qemu_coroutine_yield benchmark
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL 06/11] coroutine: add qemu_coroutine_yield benchmark |
Date: |
Fri, 20 Sep 2013 19:42:06 +0200 |
From: Gabriel Kerneis <address@hidden>
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 <address@hidden>
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
tests/test-coroutine.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/tests/test-coroutine.c b/tests/test-coroutine.c
index 39be046..2792191 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();
}
--
1.8.3.1
- [Qemu-devel] [PULL 00/11] Block patches, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 01/11] libcacard: link against qemu-error.o for error_report(), Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 02/11] osdep: warn if open(O_DIRECT) on fails with EINVAL, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 03/11] qemu-timer: drop outdated signal safety comments, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 04/11] qemu-timer: make qemu_timer_mod_ns() and qemu_timer_del() thread-safe, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 05/11] qemu-timer: do not take the lock in timer_pending, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 06/11] coroutine: add qemu_coroutine_yield benchmark,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL 07/11] coroutine: fix /perf/nesting coroutine benchmark, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 08/11] qcow2: Correct snapshots size for overlap check, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 09/11] block: don't lose data from last incomplete sector, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 10/11] blockdev: do not default cache.no-flush to true, Stefan Hajnoczi, 2013/09/20
- [Qemu-devel] [PULL 11/11] virtio-blk: do not relay a previous driver's WCE configuration to the current, Stefan Hajnoczi, 2013/09/20