On 24 Mrz., 13:23, William Stein <wst...@gmail.com> wrote: > On Mar 23, 2012 4:32 PM, "leif" <not.rea...@online.de> wrote: > > On 23 Mrz., 19:08, Dima Pasechnik <dimp...@gmail.com> wrote: > > > Currently Sage ships only single-threaded Atlas libraries. > > > (i.e. no ptcblas and ptf77blas) > > > I actually thought our ATLAS libs /were/ multithreaded, i.e. ATLAS did > > automatically build multithreaded libs if POSIX threads are available. > > Do you have any evidence for this assertion?
Nope, not really what I'd call evidence (and I didn't assert it ;-) ), but as mentioned in my previous post (see below), our ATLAS library is linked against libpthread and also *uses* it, which led to the problems with apparently incompatible POSIX threads libs, but only for *large* matrices. (The Ubuntu 10.04 x86_64 bdists are built on redhawk, which a while ago still had the obsolete 10.04.1 LTS version IIRC, with an outdated version of libpthread, which caused the failures -- segfaults -- on machines with a newer Ubuntu release.) > > There are just no special libs with the pt prefix. > > > Trouble we had with bdists and incompatible libpthread libs btw. > > indicates the same; whether ATLAS uses multiple threads just depends > > on the "problem" size, IMHO. -leif -- 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
