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flip_test: count the number of flips and check we don't drop any

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In the basic case of just flipping between two buffers with no
additional work, we should neve drop a frame.
This commit is contained in:
Chris Wilson 2012-10-02 12:59:16 +01:00
parent 93ea0182c4
commit f509d40fa9
1 changed files with 25 additions and 1 deletions
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26
tests/flip_test.c
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@ -41,7 +41,7 @@
#include "intel_batchbuffer.h"
#include "intel_gpu_tools.h"
#define TEST_DPMS (1 << 0)
#define TEST_DPMS (1 << 0)
#define TEST_WITH_DUMMY_LOAD (1 << 1)
drmModeRes *resources;
@ -66,6 +66,7 @@ struct test_output {
drmModeConnector *connector;
int crtc;
int flags;
int count;
unsigned int current_fb_id;
unsigned int fb_ids[2];
struct kmstest_fb fb_info[2];
@ -151,6 +152,8 @@ static void page_flip_handler(int fd, unsigned int frame, unsigned int sec,
struct test_output *o = data;
unsigned int new_fb_id;
o->count++;
o->current_fb_id = !o->current_fb_id;
new_fb_id = o->fb_ids[o->current_fb_id];
@ -333,6 +336,7 @@ static void flip_mode(struct test_output *o, int crtc, int duration)
exit(4);
}
o->current_fb_id = 1;
o->count = 1; /* for the uncounted tail */
memset(&evctx, 0, sizeof evctx);
evctx.version = DRM_EVENT_CONTEXT_VERSION;
@ -373,6 +377,26 @@ static void flip_mode(struct test_output *o, int crtc, int duration)
evctx.page_flip_handler = NULL;
drmHandleEvent(drm_fd, &evctx);
/* Verify we drop no frames */
if (o->flags == 0) {
struct timeval now;
long us;
int expected;
gettimeofday(&now, NULL);
us = duration * 1000 * 1000;
us += (now.tv_sec - end.tv_sec) * 1000 * 1000;
us += now.tv_usec - end.tv_usec;
expected = us * o->mode.vrefresh / (1000 * 1000);
if (o->count < expected) {
fprintf(stderr, "dropped frames, expected %d, counted %d\n",
expected, o->count);
exit(3);
}
}
fprintf(stdout, "\npage flipping on crtc %d, connector %d: PASSED\n",
crtc, o->id);