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authorChris Wilson <chris@chris-wilson.co.uk>2015-12-20 15:18:56 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2015-12-20 21:22:35 +0000
commit3cc8f957f1c443f012b292dbb5d81acb59dffb25 (patch)
treec3bba42baccfef12351dc24678c547956d5a77d8 /benchmarks
parenta91ee853b1a1e733c0d4e291d8fc3008a9ac232f (diff)
benchmarks/gem_latency: Measure CPU usage
Try and gauge the amount of CPU time used for each dispatch/wait cycle. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'benchmarks')
-rw-r--r--benchmarks/gem_latency.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/benchmarks/gem_latency.c b/benchmarks/gem_latency.c
index 6108a9d6..65065b16 100644
--- a/benchmarks/gem_latency.c
+++ b/benchmarks/gem_latency.c
@@ -40,6 +40,7 @@
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/time.h>
+#include <sys/resource.h>
#include "drm.h"
static int done;
@@ -347,6 +348,12 @@ static double l_estimate(igt_stats_t *stats)
return igt_stats_get_mean(stats);
}
+static double cpu_time(const struct rusage *r)
+{
+ return 10e6*(r->ru_utime.tv_sec + r->ru_stime.tv_sec) +
+ (r->ru_utime.tv_usec + r->ru_stime.tv_usec);
+}
+
#define CONTEXT 1
#define REALTIME 2
static int run(int seconds,
@@ -359,6 +366,7 @@ static int run(int seconds,
pthread_attr_t attr;
struct producer *p;
igt_stats_t platency, latency, dispatch;
+ struct rusage rused;
uint32_t nop_batch;
uint32_t workload_batch;
uint32_t scratch;
@@ -458,12 +466,16 @@ static int run(int seconds,
}
}
+ getrusage(RUSAGE_SELF, &rused);
+
switch ((flags >> 8) & 0xf) {
default:
- printf("%d/%d: %7.3fus %7.3fus %7.3fus\n", complete, nrun,
+ printf("%d/%d: %7.3fus %7.3fus %7.3fus %7.3fus\n",
+ complete, nrun,
CYCLES_TO_US(l_estimate(&dispatch)),
CYCLES_TO_US(l_estimate(&latency)),
- CYCLES_TO_US(l_estimate(&platency)));
+ CYCLES_TO_US(l_estimate(&platency)),
+ cpu_time(&rused) / complete);
break;
case 1:
printf("%f\n", CYCLES_TO_US(l_estimate(&dispatch)));
@@ -474,6 +486,9 @@ static int run(int seconds,
case 3:
printf("%f\n", CYCLES_TO_US(l_estimate(&platency)));
break;
+ case 4:
+ printf("%f\n", cpu_time(&rused) / complete);
+ break;
}
return 0;