On Mon, 27 Mar 2006, Jussi T Lindgren wrote: > On Mon, 27 Mar 2006, Prof Brian Ripley wrote: > >> Not reproducible for me (and do you really think that something as simple as >> this would not have been found on x86_64 long before now?) >> This is almost certainly caused by your use of an inappropriate external >> BLAS. >> Something has probably been compiled for a different processor than the one >> you are using, since illegal instructions are a compiler (not R) issue that I >> have seen quite often on ix86 systems when this happened. >> Use --without-blas when recompiling R and see if it then works. > > Thank you for the prompt reply. Disabling the external BLAS fixed > the problem as you suspected. > > (As a minor curiosity, the problem was not caught by any tests > ran by make check or make check-all -- but I do not presume here > to speculate or guess whether the tests try out any such matrix > calculations or not.). :)
They do. What the BLAS does will depend on the exact dimensions, so there will be very many paths through its code. > > > Thanks again, > J. > > >> >> On Mon, 27 Mar 2006, [EMAIL PROTECTED] wrote: >> >>> >>> Matrix inner product seems to crash R2.2.1 on a 64bit arch. >>> More precisely, the crash happens atleast if the matrix is >>> non-square. The bug can be reproduced (atleast here) with >>> >>> bash$ bin/R >>>> X<-matrix(data=0,nrow=100,ncol=10); >>>> mat<-X%*%t(X); >>> Illegal instruction >>> bash$ >>> >>> The crash doesnt happen if the matrix is specified square, >>> e.g. 10x10. The underlying OS was >>> >>> Linux version 2.6.12-xeon-csl3 ([EMAIL PROTECTED]) (gcc version 3.4.5 >>> 20050809 >>> (prerelease) (Ubuntu 3.4.4-6ubuntu8)) #1 SMP Wed Feb 22 18:34:17 EET 2006 >>> >>> and its running on Intel(R) Xeon(TM) MP CPU 3.66GHz. >>> >>> I configured R from the source tar.gz myself; each phase of >>> "./configure --with-x=no ; make ; make install" >>> passed without aborting on any errors. >>> >>> >>> Cheers, >>> J. >>> >>> --please do not edit the information below-- >>> >>> Version: >>> platform = x86_64-unknown-linux-gnu >>> arch = x86_64 >>> os = linux-gnu >>> system = x86_64, linux-gnu >>> status = >>> major = 2 >>> minor = 2.1 >>> year = 2005 >>> month = 12 >>> day = 20 >>> svn rev = 36812 >>> language = R >>> >>> Locale: >>> [EMAIL PROTECTED];LC_NUMERIC=C;LC_TIME=en_US.ISO-8859-15;LC_COLLATE=en_US.IS >>> O-8859-15;[EMAIL PROTECTED];LC_MESSAGES=en_US.ISO-8859-15;LC_PAPER=C;LC_N >>> AME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=C;LC_IDENTIFICATION=C >>> >>> Search Path: >>> .GlobalEnv, package:methods, package:stats, package:graphics, >>> package:grDevices, package:utils, package:datasets, Autoloads, package:base >>> >>> ______________________________________________ >>> R-devel@r-project.org mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-devel >>> >>> >> >> > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
