Tests: loggerd reduce iterations (#29713)

* reduce those iterations

* sleep time could be decreased too

* in case it's negative

system/loggerd/tests/test_loggerd.py

@@ -154,7 +154,6 @@ class TestLoggerd(unittest.TestCase):
       vipc_server.create_buffers_with_sizes(stream_type, 40, False, *(frame_spec))
     vipc_server.start_listener()
 
-    for _ in range(5):
     num_segs = random.randint(2, 5)
     length = random.randint(1, 3)
     os.environ["LOGGERD_SEGMENT_LENGTH"] = str(length)
@@ -164,6 +163,7 @@ class TestLoggerd(unittest.TestCase):
 
     fps = 20.0
     for n in range(1, int(num_segs*length*fps)+1):
+      time_start = time.monotonic()
       for stream_type, frame_spec, state in streams:
         dat = np.empty(frame_spec[2], dtype=np.uint8)
         vipc_server.send(stream_type, dat[:].flatten().tobytes(), n, n/fps, n/fps)
@@ -172,7 +172,7 @@ class TestLoggerd(unittest.TestCase):
         frame = getattr(camera_state, state)
         frame.frameId = n
         pm.send(state, camera_state)
-        time.sleep(1.0/fps)
+      time.sleep(max((1.0/fps) - (time.monotonic() - time_start), 0))
 
     managed_processes["loggerd"].stop()
     managed_processes["encoderd"].stop()