Algebraic-Programming / ALP

Home of ALP/GraphBLAS and ALP/Pregel, featuring shared- and distributed-memory auto-parallelisation of linear algebraic and vertex-centric programs. Soon with more to come!
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GMRES has odd performance characteristics #337

Open anyzelman opened 5 months ago

anyzelman commented 5 months ago

The time-per-iteration seems to decrease with max_iterations, more so than would be explained by initialisation and post-processing overhead.

This happens for both nonblocking and reference_omp (and likely reference also, but not confirmed).

The smoke tests, however, pass-- indicating this is likely some sort of performance bug.