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.). :) 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 > > > > > > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
