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test/present: Catch FPE when notifies are broken

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If the Xserver reports 10 frames passed instantaneously, flag an error
rather than divide by zero.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2016-03-15 16:12:56 +00:00
parent 4e88e7dcc7
commit a0bf3c1f48
1 changed files with 14 additions and 0 deletions
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14
test/present-test.c
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@@ -248,6 +248,12 @@ static uint64_t msc_interval(Display *dpy, Window win, void *q)
free(ev);
} while (complete != 2);
printf("10 frame interval: msc=%lld, ust=%lld\n",
(long long)msc, (long long)ust);
XSync(dpy, True);
if (msc == 0)
return 0;
return (ust + msc/2) / msc;
}
@@ -466,6 +472,10 @@ static int test_future(Display *dpy, Window win, const char *phase, void *Q)
_x_error_occurred = 0;
interval = msc_interval(dpy, win, Q);
if (interval == 0) {
printf("Zero delay between frames\n");
return 1;
}
pixmap = XCreatePixmap(dpy, win, width, height, depth);
msc = flush_flips(dpy, win, pixmap, Q, &ust);
@@ -918,6 +928,10 @@ static int test_future_msc(Display *dpy, void *Q)
_x_error_occurred = 0;
interval = msc_interval(dpy, root, Q);
if (interval == 0) {
printf("Zero delay between frames\n");
return 1;
}
msc = check_msc(dpy, root, Q, 0, &ust);
for (n = 1; n <= 10; n++)