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[PATCH v7 10/10] tests/bench: Add bufferiszero-bench
From: |
Richard Henderson |
Subject: |
[PATCH v7 10/10] tests/bench: Add bufferiszero-bench |
Date: |
Tue, 30 Apr 2024 12:42:53 -0700 |
Benchmark each acceleration function vs an aligned buffer of zeros.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tests/bench/bufferiszero-bench.c | 47 ++++++++++++++++++++++++++++++++
tests/bench/meson.build | 1 +
2 files changed, 48 insertions(+)
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..222695c1fa
--- /dev/null
+++ b/tests/bench/bufferiszero-bench.c
@@ -0,0 +1,47 @@
+/*
+ * 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 max = 64 * KiB;
+ void *buf = g_malloc0(max);
+ int accel_index = 0;
+
+ do {
+ if (accel_index != 0) {
+ g_test_message("%s", ""); /* gnu_printf Werror for simple "" */
+ }
+ for (size_t len = 1 * KiB; len <= max; len *= 4) {
+ double total = 0.0;
+
+ g_test_timer_start();
+ do {
+ buffer_is_zero_ge256(buf, len);
+ total += len;
+ } while (g_test_timer_elapsed() < 0.5);
+
+ total /= MiB;
+ g_test_message("buffer_is_zero #%d: %2zuKB %8.0f MB/sec",
+ accel_index, len / (size_t)KiB,
+ 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..4cd7a2f6b5 100644
--- a/tests/bench/meson.build
+++ b/tests/bench/meson.build
@@ -21,6 +21,7 @@ benchs = {}
if have_block
benchs += {
+ 'bufferiszero-bench': [],
'benchmark-crypto-hash': [crypto],
'benchmark-crypto-hmac': [crypto],
'benchmark-crypto-cipher': [crypto],
--
2.34.1
- [PATCH v7 01/10] util/bufferiszero: Remove SSE4.1 variant, (continued)
- [PATCH v7 01/10] util/bufferiszero: Remove SSE4.1 variant, Richard Henderson, 2024/04/30
- [PATCH v7 04/10] util/bufferiszero: Remove useless prefetches, Richard Henderson, 2024/04/30
- [PATCH v7 03/10] util/bufferiszero: Reorganize for early test for acceleration, Richard Henderson, 2024/04/30
- [PATCH v7 05/10] util/bufferiszero: Optimize SSE2 and AVX2 variants, Richard Henderson, 2024/04/30
- [PATCH v7 06/10] util/bufferiszero: Improve scalar variant, Richard Henderson, 2024/04/30
- [PATCH v7 08/10] util/bufferiszero: Simplify test_buffer_is_zero_next_accel, Richard Henderson, 2024/04/30
- [PATCH v7 07/10] util/bufferiszero: Introduce biz_accel_fn typedef, Richard Henderson, 2024/04/30
- [PATCH v7 09/10] util/bufferiszero: Add simd acceleration for aarch64, Richard Henderson, 2024/04/30
- [PATCH v7 02/10] util/bufferiszero: Remove AVX512 variant, Richard Henderson, 2024/04/30
- [PATCH v7 10/10] tests/bench: Add bufferiszero-bench,
Richard Henderson <=