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[Qemu-devel] [PATCH] qemu_coroutine_yield benchmark
From: |
Gabriel Kerneis |
Subject: |
[Qemu-devel] [PATCH] qemu_coroutine_yield benchmark |
Date: |
Tue, 17 Sep 2013 17:09:39 +0200 |
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>
---
tests/test-coroutine.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
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();
}
--
1.8.4.rc3
- [Qemu-devel] [PATCH] qemu_coroutine_yield benchmark,
Gabriel Kerneis <=