Sorry for not having expressed myself clearly, I meant the latest version of fedora to work fine (24 development). I always used the latest julia nightly available on the copr nalimilan repo. Right now that is: 0.5.0-dev+3292, Commit 9d527c5*, all use LLVM: libLLVM-3.7.1 (ORCJIT, haswell)
peakflops on all machines (hardware identical) is ~1.2..1.5e11. Fedora 22&23 with julia 0.5 is ~50% slower then 0.4, only on fedora 24 julia 0.5 is faster compared to julia 0.4. On Wednesday, March 16, 2016 at 7:34:28 PM UTC+1, Milan Bouchet-Valat wrote: > > Le mercredi 16 mars 2016 à 09:25 -0700, Johannes Wagner a écrit : > > just a little update. Tested some other fedoras: Fedora 22 with llvm > > 3.8 is also slow with julia 0.5, whereas a fedora 24 branch with llvm > > 3.7 is faster on julia 0.5 compared to julia 0.4, as it should be > > (speedup from inner loop parts translated into speedup to whole > > function). > > > > don't know if anyone cares about that... At least the latest version > > seems to work fine, hope it stays like this into the final fedora 24 > What's the "latest version"? git built from source or RPM nightlies? > With which LLVM version for each? > > If from the RPMs, I've switched them to LLVM 3.8 for a few days, and > went back to 3.7 because of a build failure. So that might explain the > difference. You can install the last version which built with LLVM 3.8 > manually from here: > > https://copr-be.cloud.fedoraproject.org/results/nalimilan/julia-nightlies/fedora-23-x86_64/00167549-julia/ > > > It would be interesting to compare it with the latest nightly with 3.7. > > > Regards > > > > > > hey guys, > > > I just experienced something weird. I have some code that runs fine > > > on 0.43, then I updated to 0.5dev to test the new Arrays, run same > > > code and noticed it got about ~50% slower. Then I downgraded back > > > to 0.43, ran the old code, but speed remained slow. I noticed while > > > reinstalling 0.43, openblas-threads didn't get isntalled along with > > > it. So I manually installed it, but no change. > > > Does anyone has an idea what could be going on? LLVM on fedora23 is > > > 3.7 > > > > > > Cheers, Johannes > > > >
