On Dec 26, 4:39 pm, "William Stein" <[EMAIL PROTECTED]> wrote:
> Hi Michael,
Hi,
> I just attempted to build Sage on some fancy new 16-core 32GB RAM
> opteron box running Ubuntu at Harvard,
> and it fails in building Sage. The machine is completely unloaded,
> but ATLAS fails to build every time with
> tolerance errors. I put the log file here:
>
> http://sage.math.washington.edu/home/was/build/install-atlas_fail.log
>
> Thoughts?
To summarize some IRC and off-list email exchanges. It is in all
likelihood a power management issue, see the low frequency and
bogomips below. The FAQ answers how to fix that :)
Otherwise the kernel might be misconfigured for such a large box.
Cheers,
Michael
> [EMAIL PROTECTED]:~/sage$ uname -a
> Linux newserver 2.6.22-14-server #1 SMP Sun Oct 14 22:09:15 GMT 2007
> x86_64 GNU/Linux
> [EMAIL PROTECTED]:~/sage$ cat /etc/issue
> Ubuntu 7.10 \n \l
>
> [EMAIL PROTECTED]:~/sage$ free
> total used free shared buffers cached
> Mem: 32506144 1719772 30786372 0 226088 921984
> -/+ buffers/cache: 571700 31934444
> Swap: 7815612 0 7815612
>
> $ cat /proc/cpuinfo
> ...
> processor : 15
> vendor_id : AuthenticAMD
> cpu family : 15
> model : 65
> model name : Dual-Core AMD Opteron(tm) Processor 8218
> stepping : 2
> cpu MHz : 1000.000
> cache size : 1024 KB
> physical id : 7
> siblings : 2
> core id : 1
> cpu cores : 2
> fpu : yes
> fpu_exception : yes
> cpuid level : 1
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext
> fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm
> extapic cr8_legacy
> bogomips : 1999.92
> TLB size : 1024 4K pages
> clflush size : 64
> cache_alignment : 64
> address sizes : 40 bits physical, 48 bits virtual
> power management: ts fid vid ttp tm stc
>
> --
> William Stein
> Associate Professor of Mathematics
> University of Washingtonhttp://wstein.org
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