# [petsc-dev] TAOPDIPM

Pierre Jolivet pierre.jolivet at enseeiht.fr
Tue Aug 4 12:12:33 CDT 2020

```Hello,
If I comment line 89 and 90 of src/tao/constrained/tutorials/ex1.c from master, the example deadlocks with a single process.
Is this expected?

Thanks,
Pierre

\$  ./ex1 -tao_monitor
---- Constrained Problem -----
Solution should be f(1,1)=-2
0 TAO,  Function value: 8.,  Residual: 8.48528
1 TAO,  Function value: 1.28532,  Residual: 10.7411
2 TAO,  Function value: -2.56703,  Residual: 1.87847
3 TAO,  Function value: -2.03161,  Residual: 0.12881
4 TAO,  Function value: -1.99961,  Residual: 0.0450855
5 TAO,  Function value: -1.99993,  Residual: 0.000916939
6 TAO,  Function value: -1.99999,  Residual: 6.69184e-05
7 TAO,  Function value: -2.,  Residual: 7.15427e-06
8 TAO,  Function value: -2.,  Residual: 7.15779e-07
9 TAO,  Function value: -2.,  Residual: 7.15777e-08
10 TAO,  Function value: -2.,  Residual: 7.15777e-09
11 TAO,  Function value: -2.,  Residual: 7.15779e-10
12 TAO,  Function value: -2.,  Residual: 7.15775e-11
13 TAO,  Function value: -2.,  Residual: 7.1599e-12
14 TAO,  Function value: -2.,  Residual: 7.1599e-13
15 TAO,  Function value: -2.,  Residual: 7.22085e-14
16 TAO,  Function value: -2.,  Residual: 6.44626e-15
17 TAO,  Function value: -2.,  Residual: 1.00751e-15
18 TAO,  Function value: -2.,  Residual: 1.70295e-17
19 TAO,  Function value: -2.,  Residual: 1.70295e-18
20 TAO,  Function value: -2.,  Residual: 1.70295e-19
21 TAO,  Function value: -2.,  Residual: 1.70295e-20
22 TAO,  Function value: -2.,  Residual: 1.70295e-21
23 TAO,  Function value: -2.,  Residual: 1.70295e-22
24 TAO,  Function value: -2.,  Residual: 1.70295e-23
25 TAO,  Function value: -2.,  Residual: 1.70295e-24
26 TAO,  Function value: -2.,  Residual: 1.70295e-25
27 TAO,  Function value: -2.,  Residual: 1.70295e-26
28 TAO,  Function value: -2.,  Residual: 1.70295e-27
29 TAO,  Function value: -2.,  Residual: 1.70295e-28
30 TAO,  Function value: -2.,  Residual: 1.70295e-29
31 TAO,  Function value: -2.,  Residual: 1.70295e-30
32 TAO,  Function value: -2.,  Residual: 1.70295e-31
33 TAO,  Function value: -2.,  Residual: 1.70295e-32
34 TAO,  Function value: -2.,  Residual: 1.70295e-33
35 TAO,  Function value: -2.,  Residual: 1.70295e-34
36 TAO,  Function value: -2.,  Residual: 1.70295e-35
37 TAO,  Function value: -2.,  Residual: 1.70295e-36
38 TAO,  Function value: -2.,  Residual: 1.70295e-37
39 TAO,  Function value: -2.,  Residual: 1.70295e-38
40 TAO,  Function value: -2.,  Residual: 1.70295e-39
41 TAO,  Function value: -2.,  Residual: 1.70295e-40
42 TAO,  Function value: -2.,  Residual: 1.70295e-41
43 TAO,  Function value: -2.,  Residual: 1.70295e-42
44 TAO,  Function value: -2.,  Residual: 1.70295e-43
45 TAO,  Function value: -2.,  Residual: 1.70295e-44
46 TAO,  Function value: -2.,  Residual: 1.70295e-45
47 TAO,  Function value: -2.,  Residual: 1.70295e-46
48 TAO,  Function value: -2.,  Residual: 1.70295e-47
49 TAO,  Function value: -2.,  Residual: 1.70295e-48
50 TAO,  Function value: -2.,  Residual: 1.70295e-49
51 TAO,  Function value: -2.,  Residual: 1.70295e-50
52 TAO,  Function value: -2.,  Residual: 1.70295e-51
^C
```