Benchmark each acceleration function vs an aligned buffer of zeros.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
tests/bench/bufferiszero-bench.c | 42 ++++++++++++++++++++++++++++++++
tests/bench/meson.build | 4 ++-
2 files changed, 45 insertions(+), 1 deletion(-)
create mode 100644 tests/bench/bufferiszero-bench.c
diff --git a/tests/bench/bufferiszero-bench.c b/tests/bench/bufferiszero-bench.c
new file mode 100644
index 0000000000..1fa2eb6973
--- /dev/null
+++ b/tests/bench/bufferiszero-bench.c
@@ -0,0 +1,42 @@
+/*
+ * QEMU buffer_is_zero speed benchmark
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version. See the COPYING file in the
+ * top-level directory.
+ */
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qemu/units.h"
+
+static void test(const void *opaque)
+{
+ size_t len = 64 * KiB;
+ void *buf = g_malloc0(len);
+ int accel_index = 0;
+
+ do {
+ double total = 0.0;
+
+ g_test_timer_start();
+ do {
+ buffer_is_zero_ge256(buf, len);
+ total += len;
+ } while (g_test_timer_elapsed() < 5.0);
+
+ total /= MiB;
+ g_test_message("buffer_is_zero #%d: %.2f MB/sec",
+ accel_index, total / g_test_timer_last());
+
+ accel_index++;
+ } while (test_buffer_is_zero_next_accel());
+
+ g_free(buf);
+}
+
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+ g_test_add_data_func("/cutils/bufferiszero/speed", NULL, test);
+ return g_test_run();
+}
diff --git a/tests/bench/meson.build b/tests/bench/meson.build
index 7e76338a52..70d45ff400 100644
--- a/tests/bench/meson.build
+++ b/tests/bench/meson.build
@@ -17,7 +17,9 @@ executable('atomic64-bench',
dependencies: [qemuutil],
build_by_default: false)
-benchs = {}
+benchs = {
+ 'bufferiszero-bench': [],
+}
if have_block
benchs += {
--
2.34.1
