An 8 "core" machine, i.e. fake intel count number
$ grep -m1 '^model name' /proc/cpuinfo
model name : Intel(R) Core(TM) i7-4810MQ CPU @ 2.80GHz
in debian rules file:
SSE = --enable-simd=avx --enable-simd=sse2 --enable-threads -with-gtk
compiled with gcc (Ubuntu 8.3.0-6ubuntu1) 8.3.0 -O3
position id: 4NvBGECYr8ELAA:MBngAAAAIAAE
rollout cube action:
So make this sse2.
8 threads: 93 seconds
4 threads: 100 seconds On stock debian: 111 seconds
2 threads: 172 seconds
1 thread: 312
with avx, 8 threads: 81 seconds and 99 seconds with 4 threads, so maybe a small improvement, maybe not.
On Wed, 4 Dec 2019 at 20:29, Ralph Corderoy <address@hidden> wrote:
> Hi Joseph,
> > What we really need is someone with access to some computing power
> > (aka grid) to run a set of reference positions - 0-ply cube decisions
> > vs 2-ply, and see what the difference is. That would give a hint as to
> > what to do.
> How about reporting your
> grep -m1 '^model name' /proc/cpuinfo
> along with the stock Ubuntu package version's time on a reference
> position when given 1, 2, ... threads. And then you're self-compiled
> version for comparison, noting what you changed in debian/rules.
> It would be a start, and also offer some precision so if something is
> awry then others on the list may have data to judge by.
> Cheers, Ralph.