Allow user to set MPI ranks in test suite

[RonRahaman]

Currently, the parallel test cases in NekTests.py are always run with 4 MPI ranks. We should allow the user to set the number of MPI ranks.

[maxhutch]

Could we build this generally enough that a future test could be cross-validation vs number of ranks?

[RonRahaman]

That's a great idea. The user could provide a list of ranks and the test case would handle it accordingly.

This would actually simplify the interfaces to the tests considerably. Right now, each test case has four methods. For example:

• TurbChannel.test_PnPn_Serial (1 rank)
• TurbChannel.test_PnPn_Parallel (4 ranks)
• TurbChannel.test_PnPn2_Serial (1 rank)
• TurbChannel.test_PnPn2_Parallel (4 ranks)

If we allow the user to specify a list of ranks, then we can reduce the test case methods to:

• TurbChannel.test_PnPn
• TurbChanneln.test_PnPn2
  Each method would perform the cross-validation with the given list or ranks. Or, if the list is a single value, no cross-validation would occur.

[stgeke]

Do we also run serial tests w/o MPI?

[RonRahaman]

We don't, I will add that as a separate issue.

[RonRahaman]

Do we also run serial tests w/o MPI?

I added this issue to Nek5000/Nek5000#55

[fischer1]

Yes - I think this is important, since we advertise that we have this capability
and I use it regularly when debugging.

---

From: Ron Rahaman [notifications@github.com]
Sent: Tuesday, August 09, 2016 9:23 AM
To: Nek5000/NekExamples
Subject: Re: [Nek5000/NekExamples] Allow user to set MPI ranks in test suite (#15)

Do we also run serial tests w/o MPI?

I added this issue to Nek5000/Nek5000#55https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_Nek5000_Nek5000_issues_55&d=CwMCaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=bBKUKHeOUQYUUcfES2GnUlhzzfmhFc7KlYsosI2DIEU&m=IbsD84J6V2u_VNBY0jr_-Z3snBm8c0KVbjI6FdO52jw&s=6H3dxIzpKQ-nFF9jtkg1rrV4rr9yLwjwVAFBJeULWK0&e=

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly, view it on GitHubhttps://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_Nek5000_NekExamples_issues_15-23issuecomment-2D238569030&d=CwMCaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=bBKUKHeOUQYUUcfES2GnUlhzzfmhFc7KlYsosI2DIEU&m=IbsD84J6V2u_VNBY0jr_-Z3snBm8c0KVbjI6FdO52jw&s=jTMXlM1PvBffj6wxfX6BnB_h5PhNF55nWusvqOePpqQ&e=, or mute the threadhttps://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_notifications_unsubscribe-2Dauth_AKu-2DkXKbROy8-5FCXqDlBCzyCLUPwgO8hvks5qeI1jgaJpZM4JYaZU&d=CwMCaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=bBKUKHeOUQYUUcfES2GnUlhzzfmhFc7KlYsosI2DIEU&m=IbsD84J6V2u_VNBY0jr_-Z3snBm8c0KVbjI6FdO52jw&s=omYDCiQ-ai5GuUP4m9i6HuB8m2Omx7MxiVfiRbkzGho&e=.

[RonRahaman]

Closed in PR #20