The following table summarises a systematic comparison. Given a test with eieio (e.g. 2+2W+eieio+lwsync) we produce a new test by replacing all occurences of eieio by lwsync (e.g. 2+2W+lwsync+lwsync, that is, 2+2W+lwsyncs). We then compare the verdicts of both tests for Power G5, Power 6 and Power 7. The verdict for lwsync tests is extracted from previous experiments and the verdict for eieio tests from the present experiments.
We found no difference on Power 6 or on Power 7. A few differences appear on Power G5 — they are highlighted in red below. Those do not look very significant. Nevertheless,at the time being, we are still running the tests on our Power G5 machine.