Relaxed tolerance for cumultivae_logsumexp closed form test

Author: oleksandr-pavlyk

dpctl/tests/test_tensor_accumulation.py

@@ -408,5 +408,5 @@ def test_cumulative_logsumexp_closed_form(fpdt):
     r = dpt.cumulative_logsumexp(dpt.arange(-n, 0, dtype=fpdt, device=q))
     expected = geometric_series_closed_form(n, dtype=fpdt, device=q)
 
-    tol = 4 * dpt.finfo(fpdt).eps
+    tol = 16 * dpt.finfo(fpdt).eps
     assert dpt.allclose(r, expected, atol=tol, rtol=tol)