Robert Myers
2010-07-18 22:02:49 UTC
I have lamented, at length, the proliferation of flops at the expense of
bytes-per-flop in what are now currently styled as supercomputers.
This subject came up recently on the Fedora User's Mailing List when
someone claimed that GPU's are just what the doctor ordered to make
high-end computation pervasively available. Even I have fallen into
that trap, in this forum, and I was quickly corrected. In the most
general circumstance, GPU's seem practically to have been invented to
expose bandwidth starvation.
At least one person on the Fedora list got it and says that he has
encountered similar issues in his own work (what is in short supply is
not flops, but bytes per flop). He also seems to understand that the
problem is fundamental and cannot be made to go away with an endless
proliferation of press releases, photographs of "supercomputers," and an
endless procession of often meaningless color plots.
Since the issue is only tangentially related to the list, he suggested a
private mailing list to pursue the issue further without annoying others
with a topic that most are manifestly not interested in.
The subject is really a mix of micro and macro computer architecture,
the physical limitations of hardware, the realities of what is ever
likely to be funded, and the grubby details of computational mathematics.
Since I have talked most about the subject here and gotten the most
valuable feedback here, I thought to solicit advice as to what kind of
forum would seem most plausible/attractive to pursue such a subject. I
could probably host a mailing list myself, but would that be the way to
go about it and would anyone else be interested?
Email me privately if you don't care to respond publicly.
Thanks.
Robert.
bytes-per-flop in what are now currently styled as supercomputers.
This subject came up recently on the Fedora User's Mailing List when
someone claimed that GPU's are just what the doctor ordered to make
high-end computation pervasively available. Even I have fallen into
that trap, in this forum, and I was quickly corrected. In the most
general circumstance, GPU's seem practically to have been invented to
expose bandwidth starvation.
At least one person on the Fedora list got it and says that he has
encountered similar issues in his own work (what is in short supply is
not flops, but bytes per flop). He also seems to understand that the
problem is fundamental and cannot be made to go away with an endless
proliferation of press releases, photographs of "supercomputers," and an
endless procession of often meaningless color plots.
Since the issue is only tangentially related to the list, he suggested a
private mailing list to pursue the issue further without annoying others
with a topic that most are manifestly not interested in.
The subject is really a mix of micro and macro computer architecture,
the physical limitations of hardware, the realities of what is ever
likely to be funded, and the grubby details of computational mathematics.
Since I have talked most about the subject here and gotten the most
valuable feedback here, I thought to solicit advice as to what kind of
forum would seem most plausible/attractive to pursue such a subject. I
could probably host a mailing list myself, but would that be the way to
go about it and would anyone else be interested?
Email me privately if you don't care to respond publicly.
Thanks.
Robert.