RFR(M): 8154736: enhancement of cmpxchg and copy_to_survivor for ppc64

John Paul Adrian Glaubitz glaubitz at physik.fu-berlin.de
Tue Apr 24 14:42:26 UTC 2018


On 04/24/2018 04:20 PM, Doerr, Martin wrote:
> I think 6% performance gain is really worth doing this change.

Quick question: Does this pose any assumptions on the instruction set baseline
on ppc64? I haven't build-tested this yet, but I want to avoid it doesn't break
on POWER5, for example, which is used in Debian's big-endian ppc64 port.


  .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz at debian.org
`. `'   Freie Universitaet Berlin - glaubitz at physik.fu-berlin.de
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