numTasks potential bug

[wadudmiah]

In the IOR documentation, it says:

numTasks - number of tasks that should participate in the test [0] NOTE: **0 denotes all tasks**

But when I set numTasks to 0, I get the following runtime error:

ior ERROR: too few tasks for testing, errno 12, Cannot allocate memory (ior.c:1573)

The source has the following line that produces this error:

if (test->numTasks <= 0)
                ERR("too few tasks for testing");

If I'm not mistaken, isn't this a bug?

[JulianKunkel]

It seems this is a bug: Updating documentation isn't a strongsuit, yet but work in progress.

[wadudmiah]

So I presume numTasks should be equal to or less than the number of MPI processes (as in mpirun -n <procs>)?

[JulianKunkel]

At the moment, yes. It seems sensible to set 0 to be as you state (this is the size in the MPI communicator)

[wadudmiah]

Hi Julian, I didn't realise you were based in Reading. I'm just up the road in Didcot!

[JulianKunkel]

It appears that if you set it to -1, then it uses numTasks. I added PR #330 to fix it. Cool. Let me know if you have any other questions.