[HPGMG Forum] HPGMG release v0.1
jed at jedbrown.org
Sat Jun 7 22:39:02 UTC 2014
Barry Smith <bsmith at mcs.anl.gov> writes:
> The use of multicore processor == sockets as the independent
> variable in the plot of aggregate performance seems
> arbitrary. Though people should not use this kind of plot to
> compare machines they will. Now just change sockets to nodes and
> boom suddenly the machines compare very differently (since some
> systems have two sockets per node and some one).
This only changes the x axis, which is a fairly arbitrary measure of how
much machine is being used. The y axis is a figure of merit (probably
not The Metric).
> Should cores be used instead? Or hardware threads? Or cores scaled
> by their clock speed? Or hardware floating point units (scaled by
> clock speed?) ? Or number of instruction decorders?
These all have the same problem.
> Power usage?
I think power usage is a more useful normalization of machine size, but
number of nodes or number of sockets is the most common way that users
of a particular machine think about a partition size.
> Cost? etc etc. Maybe have a dynamic plot where one can switch the
> independent variable by selecting from a menu or moving the mouse
> over choices ….?
That would be cool, but my D3.js skills will have to improve to make
that interactive plot.
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