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test/present: Synchronize MSC notifiy modulus test to the vblank

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As the test presumes we can queue all the modulus queries within the
same vblank, we can improve matters by synchronizing to the next vblank
first.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2015-04-06 14:00:44 +01:00
parent e74ff58144
commit c47fd1dcad
1 changed files with 36 additions and 3 deletions
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39
test/present-test.c
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@@ -178,6 +178,39 @@ static uint64_t check_msc(Display *dpy, Window win, void *q, uint64_t last_msc,
return msc;
}
static uint64_t wait_vblank(Display *dpy, Window win, void *q)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
static uint32_t serial = 1;
uint64_t msc = 0;
int complete = 0;
xcb_present_notify_msc(c, win, serial ^ 0xdeadbeef, 0, 1, 0);
xcb_flush(c);
do {
xcb_present_complete_notify_event_t *ce;
xcb_generic_event_t *ev;
ev = xcb_wait_for_special_event(c, q);
if (ev == NULL)
break;
ce = (xcb_present_complete_notify_event_t *)ev;
if (ce->kind == XCB_PRESENT_COMPLETE_KIND_NOTIFY_MSC &&
ce->serial == (serial ^ 0xdeadbeef)) {
msc = ce->msc;
complete = 1;
}
free(ev);
} while (!complete);
if (++serial == 0)
serial = 1;
return msc;
}
static uint64_t msc_interval(Display *dpy, Window win, void *q)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
@@ -1095,13 +1128,12 @@ static int test_modulus_msc(Display *dpy, void *Q)
printf("Testing notify modulus\n");
_x_error_occurred = 0;
target = check_msc(dpy, root, Q, 0, NULL);
target = wait_vblank(dpy, root, Q);
xcb_present_notify_msc(c, root, 0, 0, 0, 0);
for (x = 1; x <= 19; x++) {
for (y = 0; y < x; y++) {
for (y = 0; y < x; y++)
xcb_present_notify_msc(c, root, y << 16 | x, 0, x, y);
}
}
xcb_present_notify_msc(c, root, 0xdeadbeef, target + 2*x, 0, 0);
xcb_flush(c);
@@ -1111,6 +1143,7 @@ static int test_modulus_msc(Display *dpy, void *Q)
ce = (xcb_present_complete_notify_event_t *)ev;
assert(ce->kind == XCB_PRESENT_COMPLETE_KIND_NOTIFY_MSC);
assert(ce->serial == 0);
assert(target == ce->msc);
target = ce->msc;
}