stress-ng memory test tries to run lockbus stressor on ppc64le. lockbus is not supported on ppc64le

[Mike Rushton]

The certification memory test from checkbox running stress-ng tries to run the lockbus stressor on ppc64le when lockbus is not supported on ppc64le.

We might need an exclusion in the script for ppc64le for this test.

Running stress-ng lockbus stressor for 3 seconds....
stress-ng: unrecognized option '--lockbus'
Try 'stress-ng --help' for more information.
return_code is 1
*****************************************************************
** Error 1 reported on stressor lockbus!)
*****************************************************************

[Jeff Lane  (bladernr)]

waiting for colin to let me know if this is even valid

[Colin Ian King (colin-king)]

The manual does clearly describe the arch specific nature of this option:

       --lockbus N
              start N workers that rapidly lock and increment 64 bytes of ran‐
              domly chosen memory from a 16MB mmap'd region (Intel x86 CPUs
              only). This will cause cacheline misses and stalling of CPUs.