Which exact vectorization you used and how much slower rendering became? Do you mind doing tests for new versions of OIIO/OSL?
I'll do tests on Linux, but from quick tests i did last week i didn't notice slowdown actually. On Fri, Jan 8, 2016 at 1:49 AM, Thomas Dinges <[email protected]> wrote: > Hi, > answers inline. > > Am 07.01.16 um 16:27 schrieb Sergey Sharybin: > > Hey, > > > > This mail is mainly to the platform maintainers, but might be interesting > > for other guys around as well. > > > > Proposal is to update the following libraries: > > > > - Boost to 1.60 (will bring some fixes required to make OpenVDB work, see > > some earlier discussion in the list) > > - OIIO to 1.6.9 (will bring fixes to such areas as alpha handling in > > Jpeg2000) > > - OSL to 1.6.9 (general improvements, fixes, optimizations etc) > Sounds good to me. > > > > it also seems a good idea to set USE_SIMD to sse2 for both OIIO and OSL, > > this should give some additional improvements. (Unfortunately, we can't > go > > higher than SSE2 because OIIO/OSL does nto do runtime checks and our > > current requirement is SSE2 CPUs, using higher optimization will make > > Blender unusable). > I actually did some tests here on Windows already (with OIIO/OSL master > snapshots from some months ago), and back then it gave me 0% speedup, on > the contrary, it seemed slower. Not sure why this happened, but we > should carefully benchmark this and definitely build the libs once with > and once without SIMD first locally on our machines and run some > benchmarks. > > > > LLVM we can't really update yet, OSL requires it to be compiled with > C++11 > > when using LLVM newer than 3.4 series. So will propose to keep LLVM > version > > unchanged for now. > > > Best regards, > Thomas > _______________________________________________ > Bf-committers mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-committers > -- With best regards, Sergey Sharybin _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
