[Bug 1117335] Re: libblas.so.3 illegal instruction on AMD E-450

2013-02-12 Thread Dave Gilbert
Hi Sylvestre, Can you explain your comment a bit; libblas for me is not a symlink; and as for the low performance compilation; it seems to the opposite problem in this case - it's trying to run a barcelona optimised version of the code that is using an instruction not available on this cpu. D

[Bug 1117335] Re: libblas.so.3 illegal instruction on AMD E-450

2013-02-11 Thread Sylvestre Ledru
It is not about blas but atlas (libblas is just a symlink). You should rebuild atlas for your system. By default, Debian (and therefor Ubuntu) are shipping a low performance compilation of atlas. You will find the information in the README.Debian file. ** Package changed: blas (Ubuntu) => atlas

[Bug 1117335] Re: libblas.so.3 illegal instruction on AMD E-450

2013-02-11 Thread Nghia
It must be the same bug as reported there. I executed your commands and it says "femms". This is the output from /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 20 model : 2 model name : AMD E-450 APU with Radeon(tm) HD Graphics stepping:

[Bug 1117335] Re: libblas.so.3 illegal instruction on AMD E-450

2013-02-11 Thread Dave Gilbert
Interesting, I noticed bug 1122030 today - not sure if it's related. Since you have it at a gdb, could you do: x/i $pc at the point it fails (possibly the disassemble command may work) to see what the instruction is. Also can you post the output of cat /proc/cpuinfo on your machine to see wha