This patch does:
- Remove outdated comments (which someday I marked with "?").
- Reassemble instructions to fit them in fewer bundles.
- If McKinley Errata 9 workaround is not needed, the workaround
bundles will be patched out with NOPs. However it also not
needed to have a totally NOP bundle (nop * 3) before branch.
As a result, this makes the code path 3 (or 2) bundles shorter
(and remove 1 unnecessary stop bit). It seems to be 1% faster.
(10sec loop test, with nojitter @ Madison 1.5GHz x 4)
Before:
CPU 0: 0.14 (usecs) (0 errors / 69598875 iterations)
CPU 1: 0.14 (usecs) (0 errors / 69630721 iterations)
CPU 2: 0.14 (usecs) (0 errors / 69607850 iterations)
CPU 3: 0.14 (usecs) (0 errors / 69619832 iterations)
After:
CPU 0: 0.14 (usecs) (0 errors / 70257728 iterations)
CPU 1: 0.14 (usecs) (0 errors / 70309498 iterations)
CPU 2: 0.14 (usecs) (0 errors / 70280639 iterations)
CPU 3: 0.14 (usecs) (0 errors / 70260682 iterations)
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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