[Numpy-discussion] Different results from repeated calculation

Charles R Harris charlesr.harris at gmail.com
Sat Jan 27 17:19:03 CST 2007


On 1/27/07, Fernando Perez <fperez.net at gmail.com> wrote:
>
> On 1/27/07, Fernando Perez <fperez.net at gmail.com> wrote:
> > On 1/27/07, Charles R Harris <charlesr.harris at gmail.com> wrote:
> >
> > > Hmmm, and your problem machine is running smp linux. As is mine;
> fedora uses
> > > smp even on single processor machines these days. I think we could use
> more
> > > data here comparing
> > >
> > > OSX
> > > Linux (single, smp)
>
> Sorry, I forgot to add:
>
> tlon[~/Desktop]> uname -a
> Linux tlon 2.6.17-10-generic #2 SMP Tue Dec 5 22:28:26 UTC 2006 i686
> GNU/Linux
> tlon[~/Desktop]> python -V
> Python 2.4.4c1
> tlon[~/Desktop]> cat /proc/cpuinfo
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 15
> model           : 35
> model name      : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+
>
> This box runs up to date Ubuntu Edgy.


Yep, I am thinking a race condition in the linux  smp kernel.

Chuck
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