A
AirRaid Mach 2.5
PDF article: http://www.cs.berkeley.edu/~samw/projects/cell/CF06.pdf
web article: http://www.hpcwire.com/hpc/671376.html
web article: http://www.hpcwire.com/hpc/671376.html
AirRaid said:PDF article: http://www.cs.berkeley.edu/~samw/projects/cell/CF06.pdf
web article: http://www.hpcwire.com/hpc/671376.html
Jim Granville said:Interesting.
They state
" On average, Cell is eight times faster and at least eight times more
power efficient than current Opteron and Itanium processors, despite the
fact that Cell's peak double precision performance is fourteen times
slower than its peak single precision performance. If Cell were to
include at least one fully utilizable pipelined double precision floating
point unit, as proposed in their Cell+ implementation, these speedups
would easily double."
but rather than think about new HW, (which is vaporware), the Authors
could have also looked at ways of mixing the two precisions, for
Future work ?.
eg For that scientific SW that is convegence based, perhaps
a two step Software system, that uses the 14x faster 32 bit floats on
inner loops, and 64 bits on outer & final calculations, could also give
them the ~speed double ? - but on silicon they can actually get
-jg
Gayness said:Half the average Joe doesn't know what that means
Brenden said:by these numbers PS3 should be somewhere around 2-3x more powerful
than 360???
I agree with you on the speculation of the tweaked config. Eventually
at the end of the day, it all comes down to the programmer writing
code that takes advantage of the hardware.
Jim said:but rather than think about new HW, (which is vaporware), the Authors
could have also looked at ways of mixing the two precisions, for
Future work ?.
In comp.arch Jim Granville said:AirRaid Mach 2.5 wrote:
Interesting.
They state
" On average, Cell is eight times faster and at least eight times more
power efficient than current Opteron and Itanium processors, despite the
fact that Cell's peak double precision performance is fourteen times
slower than its peak single precision performance. If Cell were to
include at least one fully utilizable pipelined double precision
floating point unit, as proposed in their Cell+ implementation, these
speedups would easily double."
Rick said:What might that do to the power consumption of the thing?
Russell said:Practically no effect, from what the original paper says.