<div dir="ltr">Hi,all<div><br></div><div>Recently I am using SLEPc to solve an sparse eigenvalue problem. I use krylov-shur and mumps as solvers.</div><div><br></div><div>My codes work well my corei5 dual core laptop. Compared to my old sequential solution ARPACK/UMFPACK, running with 2 process could give me 1.3x speedup. However when I install my code on another station with quad core CPU, the performance change significantly. My parallel code runs 2-3 times slower than sequential code.</div>
<div><br></div><div>Is there any one who knows what happened here?</div><div><br></div><div>Thanks a lot.</div></div>