Haakon, And thanks for correcting me. I had been surprised your question went unanswered so long as it did; I should always be suspicious that means I had superficially misconstrued the question. Peter
On Mon, Dec 21, 2009 at 4:05 AM, Håkon Bugge <[email protected]> wrote: > Peter, > > On Dec 19, 2009, at 22:20 , Peter St. John wrote: > > Haakon, > What I saw (in a recent Slashdot, which I ought to be able to find) was the > idea that an Intel compiler disables it's own highest levels of > optimizations if it detects that the host processor is not Intel. The > complaint is based on that I believe. > > FWIW, I imagine that if an automobile engine detected poor octane in the > fuel, it might throttle down the maximum speed of the car; but if it did so > after detecting a competitor's brand of gasoline, it could be considered > anti-competitive. But of course IMNAL or however we announce we ain't > lawyers so CGS (cum grano salis). > Peter > > > Intel's compiler generates code that will not run on AMD CPUs (i.e. non > GenuineIntel) if an instruction-set higher than SSE2 is selected. This issue > is covered by the referenced complaints elsewhere. I know this issue pretty > well, as I wrote a piece of software used by Scali/Platform MPI which > reverted the Intel compiler's check for GenuineIntel, which transparently > allowed MPI programs to run on AMD CPUs with SSE3/SSSE3 instruction set > enabled. > > Claim 20 in the complaints is not related to this, but _interoperability_ > between GPUs and Intel CPUs. That is what I tried to get a better > understanding of. I have received insightful comments around this issue > off-list. > > > Thanks anyway, Håkon > > On Thu, Dec 17, 2009 at 3:33 AM, Håkon Bugge <[email protected]> wrote: > >> In http://www.ftc.gov/os/adjpro/d9341/091216intelcmpt.pdf, there are >> allegations against Intel, such as "20. Intel’s efforts to deny >> interoperability between competitors’ (e.g., Nvidia, AMD, and Via) >> GPUs and Intel’s newest CPUs". >> >> I was unaware of this. Anyone know what kind of interoperability we are >> talking about here? >> >> >> Håkon >> >> >> _______________________________________________ >> Beowulf mailing list, [email protected] sponsored by Penguin Computing >> To change your subscription (digest mode or unsubscribe) visit >> http://www.beowulf.org/mailman/listinfo/beowulf >> > > > Mvh., > > Håkon Bugge > [email protected] > +47 924 84 514 > > > >
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