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volume: make the benchmark more meaningfull

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MMX is about 6x faster, SSE around 15x on my machine.
This commit is contained in:
Wim Taymans 2009-08-14 15:19:26 +02:00
parent dcae9a3113
commit a1235446a7
2 changed files with 67 additions and 41 deletions
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55
src/pulsecore/svolume_sse.c
View file

@ -24,8 +24,7 @@
#include <config.h>
#endif
#include <alloca.h>
#include <pulse/timeval.h>
#include <pulsecore/random.h>
#include <pulsecore/macro.h>
#include <pulsecore/g711.h>
@ -459,7 +458,7 @@ pa_volume_s24_32re_sse (uint32_t *samples, int32_t *volumes, unsigned channels,
}
#endif
#undef RUN_TEST
#define RUN_TEST
#ifdef RUN_TEST
#define CHANNELS 2
@ -474,31 +473,45 @@ static void run_test (void) {
int32_t volumes[CHANNELS + PADDING];
int i, j, padding;
pa_do_volume_func_t func;
struct timeval start, stop;
func = pa_get_volume_func (PA_SAMPLE_S16RE);
func = pa_get_volume_func (PA_SAMPLE_S16NE);
printf ("checking SSE %d\n", sizeof (samples));
printf ("checking SSE %zd\n", sizeof (samples));
for (j = 0; j < TIMES; j++) {
pa_random (samples, sizeof (samples));
memcpy (samples_ref, samples, sizeof (samples));
memcpy (samples_orig, samples, sizeof (samples));
pa_random (samples, sizeof (samples));
memcpy (samples_ref, samples, sizeof (samples));
memcpy (samples_orig, samples, sizeof (samples));
for (i = 0; i < CHANNELS; i++)
volumes[i] = rand() >> 1;
for (padding = 0; padding < PADDING; padding++, i++)
volumes[i] = volumes[padding];
for (i = 0; i < CHANNELS; i++)
volumes[i] = rand() >> 1;
for (padding = 0; padding < PADDING; padding++, i++)
volumes[i] = volumes[padding];
pa_volume_s16re_sse (samples, volumes, CHANNELS, SAMPLES * sizeof (int16_t));
func (samples_ref, volumes, CHANNELS, SAMPLES * sizeof (int16_t));
for (i = 0; i < SAMPLES; i++) {
if (samples[i] != samples_ref[i]) {
printf ("%d: %04x != %04x (%04x * %04x)\n", i, samples[i], samples_ref[i],
samples_orig[i], volumes[i % CHANNELS]);
}
func (samples_ref, volumes, CHANNELS, sizeof (samples));
pa_volume_s16ne_sse (samples, volumes, CHANNELS, sizeof (samples));
for (i = 0; i < SAMPLES; i++) {
if (samples[i] != samples_ref[i]) {
printf ("%d: %04x != %04x (%04x * %04x)\n", i, samples[i], samples_ref[i],
samples_orig[i], volumes[i % CHANNELS]);
}
}
pa_gettimeofday(&start);
for (j = 0; j < TIMES; j++) {
memcpy (samples, samples_orig, sizeof (samples));
pa_volume_s16ne_sse (samples, volumes, CHANNELS, sizeof (samples));
}
pa_gettimeofday(&stop);
pa_log_info("SSE: %llu usec.", (long long unsigned int)pa_timeval_diff (&stop, &start));
pa_gettimeofday(&start);
for (j = 0; j < TIMES; j++) {
memcpy (samples_ref, samples_orig, sizeof (samples));
func (samples_ref, volumes, CHANNELS, sizeof (samples));
}
pa_gettimeofday(&stop);
pa_log_info("ref: %llu usec.", (long long unsigned int)pa_timeval_diff (&stop, &start));
}
#endif