|Machine type||RISC-based distributed memory multi-processor.|
|Models||C-DAC PARAM Padma.|
|Operating system||AIX (IBM's Unix flavour), Linux|
|Connection structure||Clos network.|
|Compilers||Fortran 77/90, C, C++|
|Vendors information Web page||http://www.cdacindia.com/html/parampma.asp|
|Year of introduction||2003.|
|Model||C-DAC PARAM Padma|
|Clock cycle||1 GHz|
|Theor. peak performance|
|Per Proc. (Gflop/s)||4|
|No. of processors||248|
The PARAM Padma is the newest systems made by the Indian C-DAC. It is built
somewhat asymmetrically from 54 4-processor SMPs and 1 32-processor node. All
nodes employ 1 GHz IBM POWER4 processors. As an interconnection network C-DACs
own PARAMnet-II is used for which a peak bandwidth of 2.5 Gb/s (312 MB/s) is
given with a latency for short messages of ≅ 10 µs. The network is
build from 16-port PARAMnet-II switches and has a Clos64 topology, very similar
to the structure used by Myrinet. No MPI results over
this network are available.
C-DAC has already a long tradition of building parallel machines and it has always provided its own software to go with them. Therefore, the Padma comes with Fortran 90, C(++), MPI, and a Parallel Files System.
The Padma performs at 532 Gflop/s with the HPC Linpack Benchmark (see ) for a linear system of size N = 224,000 on a 62-node machine with a theoretical peak of 992 Gflop/s. That amounts to an efficiency of 53.6% for this benchmark.
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