All optimizations done to routines in accordance with HPCC rules
Customized G-RandomAccess and EP-RandomAccess: Uses IBM hardware support.
Customized G-PTRANS: Bypasses MPI and uses IBM Hub Chip interconnect
Customized G-FFT: Uses IBM Hub Chip interconnect during transpose phase
Customized EP-Stream: Uses pthreads explicit paralleization
Customized G-HPL: Uses OpenMP during LASWP phase
G-HPL: adopted pipelined broadcast communication and promoted fine-grain overlapped data transfer
G-RandomAccess: replaced MPI function calls with RDMA function calls, overlapped data transfer with data sorting, transformed data-sorting loop to use conditional move CPU instructions and applied loop distribution to table-updating loop
S&EP-RandomAccess: applied loop distribution to table-updating loop and increased iterations of inner loops
G-FFT: used the latest version of FFTE library
EP-STREAM: inserted compiler directives to use a CPU feature of fast cache line allocation
G-HPL: adopted pipelined broadcast communication and promoted fine-grain overlapped data transfer
G-RandomAccess: replaced MPI function calls with RDMA function calls and overlapped data transfer with data sorting
G-FFT: used the latest version of FFTE library
EP-STREAM: inserted compiler directives to use a CPU feature of fast cache line allocation
Extend loop length(SN/EP-RA), vectorization(G-RA), Use ASL(SN/EP-FFT), Use FFTE 4.0 vector algorithm and ASL(G-FFT)
Extend loop length (SN/EP-RA), vectorization (G-RA), Use ASL(SN/EP-FFT), Use FFTE 4.0 vector algorithm and ASL (G-FFT)
Extend loop length (SN/EP-RA), vectorization (G-RA), Use ASL(SN/EP-FFT), Use FFTE 4.0 vector algorithm and ASL (G-FFT)
HPL, FFT and Random Access were modified to utilize Blue Gene specific intrinics, OpenMP, and custom algorithm for RA to take advantage to the network topology of the system.
No optimizations other than those included in the ESSL math libraries were used.
Extend loop length (SN/EP-RA), vectorization (G-RA), Use ASL(SN/EP-FFT), Use FFTE 4.0 vector algorithm and ASL (G-FFT)
hpcc-1.0.0 using Sandia's MPIRandomAccess_opt.c
Modified HPL broadcast algorithms
Modified communication phase of Sandia's AnyNodesMPIRandomAccessUpdate to coordinate updates between ranks on-node, using MPI. No changes were made to lookahead, nor to the generation or application of updates.
Modified HPL broadcast algorithms
Used intercept routines for fftw_create_plan, fftw_one, fftw_mpi_create_plan, fftw_mpi_local_sizes, fftw_mpi_destroy_plan, fftw_mpi to interface with Cray-modified FFTW 3.2alpha3
Modified communication phase of Sandia's AnyNodesMPIRandomAccessUpdate to coordinate updates between ranks on-node, using MPI. No changes were made to lookahead, nor to the generation or application of updates.
Modified HPL broadcast algorithms
Used intercept routines for fftw_create_plan, fftw_one, fftw_mpi_create_plan, fftw_mpi_local_sizes, fftw_mpi_destroy_plan, fftw_mpi to interface with Cray-modified FFTW 3.2alpha3 (enhancements to FFTW's Alltoall algorithms)