Hi,<div><br></div><div>I have been testing PETSc's scalability on clusters for matrices of sizes 2000, 10,000, uptill 60,000.</div><div><br></div><div>All I did was try to solve Ax=b for these matrices. I found that the solution time dips if I use upto 16 or 32 processors. However for a larger number of processors however the solution time seems to go up rather than down. IS there anyway I can make my code strongly scalable ?</div>
<div><br></div><div>I am measuring the total time (sec) and KSP_SOLVE time in the -log_summary output. Both times show the same behaviour described above. </div><div><br></div><div>Gaurish</div><div><br></div>