Yes, CVAR already reads env variables, and PETSc could use the MPI_T interface to set the value at any time.

Bill

William Gropp

Director, Parallel Computing Institute

Deputy Director for Research

Institute for Advanced Computing Applications and Technologies

Thomas M. Siebel Chair in Computer Science

University of Illinois Urbana-Champaign

On Feb 22, 2014, at 5:41 AM, Jeff Hammond wrote:

I'll look into a general setenv-like mechanism for CVARs rather than an abort-specific one-off. Might be there already through MPI_T interface (which is standard, unlike MPIX).

Jeff

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