On 25/4/24 00:57, Richard Henderson wrote:
Benchmark each acceleration function vs an aligned buffer of zeros.
Signed-off-by: Richard Henderson <richard.hender...@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
+static void test(const void *opaque)
+{
+ size_t max = 64 * KiB;
+ void *buf = g_malloc0(max);
+ int accel_index = 0;
Nitpicking, accel_index could be unsigned like in util/bufferiszero.c.
+
+ 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,
Thus "buffer_is_zero #%u:..."
Regardless,
Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org>
+ total / g_test_timer_last());
+ }
+ accel_index++;
+ } while (test_buffer_is_zero_next_accel());
+
+ g_free(buf);
+}
