/usr/share/psychtoolbox-3/PsychTests/SimpleTimingTest.m is in psychtoolbox-3-common 3.0.12.20160126.dfsg1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | function SimpleTimingTest(withUpdateRunning)
t=zeros(1, 200 * 64);
% Switch to realtime scheduling:
Priority(9);
if withUpdateRunning > 0
StartUpdateProcess;
end;
running = IsUpdateRunning
WaitSecs(2);
tstart = GetSecs;
tend = tstart + 62;
count = 1;
t(1)=GetSecs;
while t(count) < tend
count = count + 1;
t(count)=GetSecs;
WaitSecs(0.005);
end;
Priority(0);
plot(t(2:count) - t(1:count-1));
return;
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