Dear All, I am using a developer version of PETSc code to test a solver code. The code loads a matrix, and solves the matrix by method A first and then method B. In each method of A and B, I setup KSP, solve, and then destroy KSP. So in this process, I set up KSP twice and destroy the KSP object twice. I am using the PreLoadxxx to do the profiling but seems like part of the profiling information is missing. PreLoadBegin(PETSC_TRUE, "A"), PreLoadStage((PETSC_TRUE, "B"), PreLoadEnd() The missing part is: Event Count Time (sec) Flops --- Global --- --- Stage --- Total Max Ratio Max Ratio Max Ratio Mess Avg len Reduct %T %F %M %L %R %T %F %M %L %R Mflop/s ------------------------------------------------------------------------------------------------------------------------ --- Event Stage 0: Main Stage --- Event Stage 1: A --- Event Stage 2: B ------------------------------------------------------------------------------------------------------------------------ Is there any way to workaround this? Many thanks, Yan