CGS vs MGS

1
CGS vs MGS

• Scalability of MGS and CGS on two different
  clusters for matrices of size
• mmloc.(procs) where mloc500 1000 2000 4000
• n 100

• over Myrinet (mpich-mx) using Goto BLAS, Intel
  Xeon 3.2 GHz

• over Ethernet (mpich) using
• Goto BLAS, Intel Xeon 3.2 GHz

CGS qi (I-Qi-1 Qi-1T) qi qi qi / qi
MGS qi (I-q1 q1T) (I-qi-1 qi-1T) qi qi
qi / qi
2
A simple experiments