since testing is a bottleneck where can I download Sage 5.0 (alpha)? Is there a Linux 64bit binary available? I wouldn't mind testing.
On Wed, Mar 7, 2012 at 4:06 AM, Jonathan Bober <jwbo...@gmail.com> wrote: > I think I remembered the problems wrong. I think maybe it isn't an issue > with the version of VirtualBox, but an issue with the kernel that mod.math > is running. Performance with multiple cores seems to be much worse than > single core performance. An example I just tried: > > with a single core in the VM, time to compile gnutls: > > real 7m46.024s > user 1m23.073s > sys 4m48.342s > > with 4 cores in the VM, time to compile gnutls (using a single process): > > real 13m20.065s > user 4m50.114s > sys 15m43.147s > > (mod.math is heavily loaded right now, so maybe this isn't a completely > conclusive test, but I think it is reliable.) I think that things are > actually much worse than it seems with the above timings. Multicore > VirtualBox seems to be basically unusable on mod.math. (I've tried this > before, and had a similar experience.) > > It is hard for me to find reliable information from google, given the age > of the OS, but there is some reference to problems here: > https://www.virtualbox.org/ticket/5501. On the bug discussion, there's > basically no identification of the problem other than "it goes away with a > newer kernel," though. > > > On Tue, Mar 6, 2012 at 12:20 PM, William Stein <wst...@gmail.com> wrote: > >> On Tue, Mar 6, 2012 at 12:11 PM, Jonathan Bober <jwbo...@gmail.com> >> wrote: >> > I am going to be building a VM on sage.math for other purposes soon, so >> I'll >> > try to make one for this as well. I suppose we would want something like >> > Ubuntu 11.10 32-bit desktop edition? >> > >> > (Unfortunately, virtualbox on the *.math machines is really old, or at >> least >> > it was last time I checked, so using more than one cpu, for example, >> doesn't >> > work. It might be nice if it could be upgraded somehow, but I imagine >> that >> > might be rather difficult without upgrading the OS.) >> >> Use mod.math instead of boxen.math. On mod.math there is a newer >> virtualbox. >> >> > >> > >> > On Tue, Mar 6, 2012 at 6:23 AM, Jeroen Demeyer <jdeme...@cage.ugent.be> >> > wrote: >> >> >> >> On 2012-03-06 15:17, Georg S. Weber wrote: >> >> > I would expect that a "Linux i386" machine >> >> > is mainly tested as a virtualized image (with a special "32bit" >> setup, >> >> > of course, maybe even using SAGE_ATLAS and such). >> >> This has been suggested regularly, it just needs to be done. If you >> are >> >> able to do this, please do it! >> >> >> >> -- >> >> To post to this group, send an email to sage-devel@googlegroups.com >> >> To unsubscribe from this group, send an email to >> >> sage-devel+unsubscr...@googlegroups.com >> >> For more options, visit this group at >> >> http://groups.google.com/group/sage-devel >> >> URL: http://www.sagemath.org >> > >> > >> > -- >> > To post to this group, send an email to sage-devel@googlegroups.com >> > To unsubscribe from this group, send an email to >> > sage-devel+unsubscr...@googlegroups.com >> > For more options, visit this group at >> > http://groups.google.com/group/sage-devel >> > URL: http://www.sagemath.org >> >> >> >> -- >> William Stein >> Professor of Mathematics >> University of Washington >> http://wstein.org >> >> -- >> To post to this group, send an email to sage-devel@googlegroups.com >> To unsubscribe from this group, send an email to >> sage-devel+unsubscr...@googlegroups.com >> For more options, visit this group at >> http://groups.google.com/group/sage-devel >> URL: http://www.sagemath.org >> > > -- > To post to this group, send an email to sage-devel@googlegroups.com > To unsubscribe from this group, send an email to > sage-devel+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/sage-devel > URL: http://www.sagemath.org > -- --- Get your facts first, then you can distort them as you please.-- -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
