tests: Test that MPI can access view data

[cwpearson]

When a GPU backend is enabled, this serves as a basic GPU-aware MPI test.

On my misconfigured system, running the tests fails like this:

Test command: /usr/bin/mpiexec "-n" "2" "./test-main"
...
3: ./test-main (KokkosComm 0.2.0)
3: [==========] Running 121 tests from 34 test suites.
3: [----------] Global test environment set-up.
3: [----------] 6 tests from TestGtest
3: [ RUN      ] TestGtest.all_fail_nonfatal
3: [       OK ] TestGtest.all_fail_nonfatal (0 ms)
3: [ RUN      ] TestGtest.0_fail_nonfatal
3: [       OK ] TestGtest.0_fail_nonfatal (0 ms)
3: [ RUN      ] TestGtest.1_fail_nonfatal
3: [       OK ] TestGtest.1_fail_nonfatal (0 ms)
3: [ RUN      ] TestGtest.all_fail_fatal
3: [       OK ] TestGtest.all_fail_fatal (0 ms)
3: [ RUN      ] TestGtest.0_fail_fatal
3: [       OK ] TestGtest.0_fail_fatal (0 ms)
3: [ RUN      ] TestGtest.1_fail_fatal
3: [       OK ] TestGtest.1_fail_fatal (0 ms)
3: [----------] 6 tests from TestGtest (0 ms total)
3: 
3: [----------] 1 test from MpiViewAccess
3: [ RUN      ] MpiViewAccess.Basic
3: sending buffer is 0x302010080-0x302810080
3: recving buffer is 0x302010080-0x302810080
3: [s1099653:2904613] Read -1, expected 8388608, errno = 14
3: [s1099653:2904612] *** Process received signal ***
3: [s1099653:2904612] Signal: Segmentation fault (11)
3: [s1099653:2904612] Signal code: Invalid permissions (2)
3: [s1099653:2904612] Failing at address: 0x302010080
3: [s1099653:2904612] [ 0] /lib/x86_64-linux-gnu/libc.so.6(+0x42520)[0x75092be42520]
3: [s1099653:2904612] [ 1] /lib/x86_64-linux-gnu/libc.so.6(+0x1a67cd)[0x75092bfa67cd]
3: [s1099653:2904612] [ 2] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_btl_vader.so(+0x3244)[0x75092a83f244]
3: [s1099653:2904612] [ 3] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_pml_ob1.so(mca_pml_ob1_send_request_schedule_once+0x1b6)[0x75092a816556]
3: [s1099653:2904612] [ 4] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_pml_ob1.so(mca_pml_ob1_recv_frag_callback_ack+0x201)[0x75092a814811]
3: [s1099653:2904612] [ 5] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_btl_vader.so(mca_btl_vader_poll_handle_frag+0x95)[0x75092a843ae5]
3: [s1099653:2904612] [ 6] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_btl_vader.so(+0x7db1)[0x75092a843db1]
3: [s1099653:2904612] [ 7] /lib/x86_64-linux-gnu/libopen-pal.so.40(opal_progress+0x34)[0x75092c9d0714]
3: [s1099653:2904612] [ 8] /lib/x86_64-linux-gnu/libopen-pal.so.40(ompi_sync_wait_mt+0xbd)[0x75092c9dd38d]
3: [s1099653:2904612] [ 9] /usr/lib/x86_64-linux-gnu/openmpi/lib/openmpi3/mca_pml_ob1.so(mca_pml_ob1_send+0x9f8)[0x75092a813ee8]
3: [s1099653:2904612] [10] /lib/x86_64-linux-gnu/libmpi.so.40(PMPI_Send+0x123)[0x75092e925003]
3: [s1099653:2904612] [11] ./test-main(+0x30628)[0x5e74e8653628]
3: [s1099653:2904612] [12] ./test-main(+0x1d9c5f)[0x5e74e87fcc5f]
3: [s1099653:2904612] [13] ./test-main(+0x1c99e6)[0x5e74e87ec9e6]
3: [s1099653:2904612] [14] ./test-main(+0x1c9c75)[0x5e74e87ecc75]
3: [s1099653:2904612] [15] ./test-main(+0x1cc263)[0x5e74e87ef263]
3: [s1099653:2904612] [16] ./test-main(+0x1cf17c)[0x5e74e87f217c]
3: [s1099653:2904612] [17] ./test-main(+0x1da227)[0x5e74e87fd227]
3: [s1099653:2904612] [18] ./test-main(+0x1c9d60)[0x5e74e87ecd60]
3: [s1099653:2904612] [19] ./test-main(+0x21e3a)[0x5e74e8644e3a]
3: [s1099653:2904612] [20] /lib/x86_64-linux-gnu/libc.so.6(+0x29d90)[0x75092be29d90]
3: [s1099653:2904612] [21] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x80)[0x75092be29e40]
3: [s1099653:2904612] [22] ./test-main(+0x2c5c5)[0x5e74e864f5c5]
3: [s1099653:2904612] *** End of error message ***
3: --------------------------------------------------------------------------
3: Primary job  terminated normally, but 1 process returned
3: a non-zero exit code. Per user-direction, the job has been aborted.
3: --------------------------------------------------------------------------
3: --------------------------------------------------------------------------
3: mpiexec noticed that process rank 0 with PID 0 on node s1099653 exited on signal 11 (Segmentation fault).
3: --------------------------------------------------------------------------
3/3 Test #3: test-main ........................***Failed    1.91 sec

67% tests passed, 1 tests failed out of 3