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Hi, I am trying to build R 2.2.1 with Kazushige Goto's BLAS library (libgoto) and encountered a problem: I have two computers with the almost identical hardware (P4 Northwood CPU, i875 chipset, 2GB DDR400 RAM) and identical Linux OS. I have the latest version of libgoto for this CPU installed on both boxes (libgoto_northwood32p-r1.00.so) and I am using gcc compiler flag...

Dear all, I am currently trying to link R 2.1.0 to the GOTO BLAS 0.99.3 library on a box running Fedora Core 3 , basically following the steps indicated in the R-Admin document: 1: I downloaded the current libgoto.xxx.so from http://www.cs.utexas.edu/users/kgoto/libraries/libgoto_prescott-32-r0.99-3.so.gz, a version suitable for our XEON machine (Nocona core), unpacked it to /usr/lib and created a symlink libgoto.so pointing to the library. 2: Then, I got ready to re-configure and re-compile R (2.1.0) using...

...for Opteron (see below). The result looks like: > mm = matrix(rnorm(1e6), nc = 1e3) > system.time(crossprod(mm)) [1] 0.5 0.0 0.5 0.0 0.0 > system.time(crossprod(mm)) [1] 0.39 0.00 0.39 0.00 0.00 > system.time(crossprod(mm)) [1] 0.39 0.01 0.39 0.00 0.00 On the dual 2.4GHz Xeon (using libgoto_p3_512-r0.6.so), I get: > mm = matrix(rnorm(1e6), nc=1e3) > system.time(crossprod(mm)) [1] 0.91 0.01 0.93 0.00 0.00 > system.time(crossprod(mm)) [1] 0.82 0.02 0.84 0.00 0.00 > system.time(crossprod(mm)) [1] 0.83 0.02 0.85 0.00 0.00 We have not found the Opteron to be faster than the X...