Simon Riggs <simon@2ndquadrant.com> writes:
> On 5 September 2017 at 21:23, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> Moreover, it matters which primitive you're testing, on which platform,
>> with which compiler, because we have a couple of layers of atomic ops
>> implementations.
> If there is no gain on 2-socket, at least there is no loss either.
The point I'm trying to make is that if tweaking generic.h improves
performance then it's an indicator of missed cases in the less-generic
atomics code, and the latter is where our attention should be focused.
I think basically all of the improvement Sokolov got was from upgrading
the coverage of generic-gcc.h.
regards, tom lane
