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benchmarks/gem_latency: Measure whole execution throughput

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Knowing how long it takes to execute the workload (and how that scales)
is interesting to put the latency figures into perspective.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-12-19 10:46:06 +00:00
parent 2f74892ebd
commit 6dbe0a3012
1 changed files with 19 additions and 12 deletions
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31
benchmarks/gem_latency.c
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@ -50,7 +50,7 @@ struct consumer {
int wait;
igt_stats_t stats;
igt_stats_t latency;
struct producer *producer;
};
@ -65,7 +65,7 @@ struct producer {
uint32_t *last_timestamp;
int wait;
int complete;
igt_stats_t stats;
igt_stats_t latency, throughput;
int nconsumers;
struct consumer *consumers;
@ -152,10 +152,10 @@ static void setup_batch(struct producer *p, int gen, uint32_t scratch)
map[i++] = MI_BATCH_BUFFER_END;
}
#define READ(x) *(volatile uint32_t *)((volatile char *)igt_global_mmio + x)
static void measure_latency(struct producer *p, igt_stats_t *stats)
{
gem_sync(fd, p->exec[1].handle);
#define READ(x) *(volatile uint32_t *)((volatile char *)igt_global_mmio + x)
igt_stats_push(stats, READ(BCS_TIMESTAMP) - *p->last_timestamp);
}
@ -172,6 +172,7 @@ static void *producer(void *arg)
execbuf.rsvd1 = p->ctx;
while (!done) {
uint32_t start = READ(BCS_TIMESTAMP);
int batches = 10;
while (batches--)
gem_execbuf(fd, &execbuf);
@ -183,7 +184,8 @@ static void *producer(void *arg)
pthread_cond_broadcast(&p->c_cond);
pthread_mutex_unlock(&p->lock);
measure_latency(p, &p->stats);
measure_latency(p, &p->latency);
igt_stats_push(&p->throughput, *p->last_timestamp - start);
pthread_mutex_lock(&p->lock);
while (p->wait)
@ -210,7 +212,7 @@ static void *consumer(void *arg)
c->wait = 0;
pthread_mutex_unlock(&p->lock);
measure_latency(p, &c->stats);
measure_latency(p, &c->latency);
}
return NULL;
@ -230,7 +232,7 @@ static double l_estimate(igt_stats_t *stats)
static int run(int nproducers, int nconsumers, unsigned flags)
{
struct producer *p;
igt_stats_t stats;
igt_stats_t latency, throughput;
uint32_t handle;
int gen, n, m;
int complete;
@ -255,13 +257,14 @@ static int run(int nproducers, int nconsumers, unsigned flags)
pthread_cond_init(&p[n].p_cond, NULL);
pthread_cond_init(&p[n].c_cond, NULL);
igt_stats_init(&p[n].stats);
igt_stats_init(&p[n].latency);
igt_stats_init(&p[n].throughput);
p[n].wait = nconsumers;
p[n].nconsumers = nconsumers;
p[n].consumers = calloc(nconsumers, sizeof(struct consumer));
for (m = 0; m < nconsumers; m++) {
p[n].consumers[m].producer = &p[n];
igt_stats_init(&p[n].consumers[m].stats);
igt_stats_init(&p[n].consumers[m].latency);
pthread_create(&p[n].consumers[m].thread, NULL,
consumer, &p[n].consumers[m]);
}
@ -274,7 +277,8 @@ static int run(int nproducers, int nconsumers, unsigned flags)
done = true;
nrun = complete = 0;
igt_stats_init_with_size(&stats, nconsumers*nproducers);
igt_stats_init_with_size(&throughput, nproducers);
igt_stats_init_with_size(&latency, nconsumers*nproducers);
for (n = 0; n < nproducers; n++) {
pthread_cancel(p[n].thread);
pthread_join(p[n].thread, NULL);
@ -284,15 +288,18 @@ static int run(int nproducers, int nconsumers, unsigned flags)
nrun++;
complete += p[n].complete;
igt_stats_push_float(&stats, l_estimate(&p[n].stats));
igt_stats_push_float(&latency, l_estimate(&p[n].latency));
igt_stats_push_float(&throughput, l_estimate(&p[n].throughput));
for (m = 0; m < nconsumers; m++) {
pthread_cancel(p[n].consumers[m].thread);
pthread_join(p[n].consumers[m].thread, NULL);
igt_stats_push_float(&stats, l_estimate(&p[n].consumers[m].stats));
igt_stats_push_float(&latency, l_estimate(&p[n].consumers[m].latency));
}
}
printf("%d/%d: %7.3fus\n", complete, nrun, 80/1000.*l_estimate(&stats));
printf("%d/%d: %7.3fus %7.3fus\n", complete, nrun,
80/1000.*l_estimate(&throughput),
80/1000.*l_estimate(&latency));
return 0;
}