15 Mar
2017
15 Mar
'17
11:43 p.m.
On Wed, Mar 15, 2017 at 9:59 AM, Larry McVoy <lm(a)mcvoy.com> wrote:
On Wed, Mar 15, 2017 at 11:36:21AM -0400, Arthur
Krewat wrote:
Solbourne computer produced OS/MP, which was a SMPized version of
SunOS 4.1. It scaled to at least 16 CPUs. Userland was 100% compatible
with SunOS at the given revision level. My team (the OI group) was
part of Solbourne for a while, so we got much of that gear when we
were spun out to ParcPlace. Our main build server had 12 CPUs, and it
was nice being able to do make -j 16. cfront was, for its time, quite
the pig. Now it's lightyears faster than clang, though produces lousy
code... OS/MP ran on hardware that was 50MHz SuperSparc CPUs and could
be configured up to 14 CPUs and a whopping 256MB of RAM...
Warner
Off-topic: Anyone ever run SunOS on a Sparc-10 or
similar platform (670?)
with two processors? Was it my imagination or did it actually use both
processors?
Yeah, SunOS 4.1.4 had some MP work done to it. Pretty sure I posted
about it here and dragged Greg Limes into it. He was involved in that
work. I think it sort of worked up to 4 CPUs but as with all early
kernel threading stuff it worked better when it was a 4 cpus of
userland work, less so when it was 4 cpus of I/O.