Photonic Interconnection Networks for Multicore Architectures
HPL-2010-204 Photonic Interconnection Networks for Multicore Architectures - Binkert, Nathan; Fiorentino, Marco Keyword(s): Nanophotonic Architecture, Networking, Optics Abstract: Silicon nanophotonics provides computer architects with the ability to solve pin bandwidth and cross-chip communication problems. Furthermore, ring resonators can be used to create simple optical circuits to implement low-latency global arbitration. ... Full Report
Hi ,
could someone suggest best reference for core file understanding , analysis , debugging for different architectures
like what registers represent what in a architecture specific core ..
how to get maximum information out of corrupted core
different tools and how they work and how to... (1 Reply)
Hi all,
Using shell script, how to assign tasks to individual processors in a multicore processor ? For example: If I have 4 processors, I want to give one job to each of the processors. (When I give multiple jobs, it's assigning all the load to a single processor. )
Thanks
R (5 Replies)
I'm fairly new to HP-UX, and I need to know how to identify the number of cores on a PA-8800 processor from the command line. Any help here would be appreciated. (11 Replies)
Everyone seemed to be a little stumped by the multicore question I asked earlier this week, so I decided I'd try a different angle.
Turns out that on a multicore system HP-UX reports every core as a seperate processor. All the usual commands (ioscan, top, etc.) report two processors for every... (7 Replies)
MPB-DATA(1) MIT Photonic-Bands Package MPB-DATA(1)NAME
mpb-data - transformations of HDF5 files output by MPB
SYNOPSIS
mpb-data [OPTION]... [HDF5FILE]...
DESCRIPTION
mpb-data is a utility to perform additional processing and transformations of HDF5 files output by MPB, the MIT Photonic-Bands program. In
particular, it is designed to make the output more amenable to visualization by reformatting it into a rectangular grid, extending it to
multiple periods, and rescaling the data.
MIT Photonic Bands (MPB) is a free program to compute the band structures (dispersion relations) and electromagnetic modes of periodic
dielectric structures.
HDF5 is a free, portable binary format and supporting library developed by the National Center for Supercomputing Applications at the Uni-
versity of Illinois in Urbana-Champaign. A single h5 file can contain multiple data sets; by default, mpb-data operates on all of the MPB-
produced datasets in the file, but this can be changed via the -d option, or by using the syntax HDF5FILE:DATASET.
mpb-data writes its output datasets as additional datasets in the input file(s), with "-new" appended to the dataset names. Alternatively,
it can write its output to a separate file, specified by the -o option.
Note also that, by default, the output datasets are identical to the input datasets; you must use one or more of the options below to spec-
ify a transformation (e.g. the -r/-e and -n options are very useful).
OPTIONS -h Display help on the command-line options and usage.
-V Print the version number and copyright info for mpb-data.
-v Verbose output.
-o file
Write output datasets to file (for the first input file only) rather than as additional datasets in the input file(s) (the default).
-r Output a rectangular cell with the same volume as the cell of the input data. This option is particularly useful for visualizing
data from non-orthogonal unit cells (e.g. a triangular lattice), as otherwise the data will appear skewed or warped in most graphics
programs. This option should almost always be accompanied by the -n option to ensure a uniform resolution.
-e x,y,z
As the -r option, but also make the first axis of the output along the x,y,z direction (in Cartesian coordinates) instead of along
the first lattice vector as for -r.
-n n Output n grid points per lattice unit ("a"). This is useful not only for interpolating to finer (or coarser) resolutions, but also
to ensure that the resolution is uniform in each direction (to prevent the data from looking distorted when you visualize it).
-x mx, -y my, -z mz
This tells mpb-data to output multiple periods in the corresponding lattice directions. to use a particular slice of a two- or
three-dimensional dataset. e.g. -x 3.2 causes the output of 3.2 periods in the first lattice direction. The default is to output
only a single period.
-m s Output s periods in each lattice direction; equivalent to: -x s -y s -z s.
-T The output has the first two dimensions (x and y) transposed. This is useful in conjunction with the parallel (MPI) version of MPB,
which for performance reasons outputs all arrays with the first two dimensions transposed. -T can undo this transposition.
-p Pixellized output. Normally, the input data is linearly interpolated to the output grid, but the -p option causes it to instead use
the nearest grid point in the input data. This is useful, for example, if you want to study the discretization of the dielectric-
function representation.
-d name
Use dataset name from the input files; otherwise, the first dataset from each file is used. Alternatively, use the syntax
HDF5FILE:DATASET, which allows you to specify a different dataset for each file. You can use the h5ls command (included with hdf5)
to find the names of datasets within a file.
BUGS
Send bug reports to S. G. Johnson, stevenj@alum.mit.edu.
AUTHORS
Written by Steven G. Johnson. Copyright (c) 1999, 2000, 2001, 2002 by the Massachusetts Institute of Technology.
SEE ALSO mpb(1)MPB January 27, 2000 MPB-DATA(1)
