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HISKP-LQCD / sLapH-contractions

Stochastic LapH contraction program
GNU General Public License v3.0
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(Compiler) switch to use runtime optimization #77

Closed maowerner closed 5 years ago

maowerner commented 6 years ago

In the DilutedTraceFactory we implicitly use knowledge about how many gamma structures are usually needed at each vertex to decide in which order the multiplication is more efficient. This is done by caching intermediate results in L1, L2. This may use a lot of RAM and is thus limiting how many operators we can calculate on a given machine. For the rho, it was necessary to delete this optimization and compile again.

It would be useful to decide at runtime which diagrams to optimize and which not. Alternatively coding this in the DiagramSpecs would at least make it more feasible to use the code in edge cases without intensive knowledge how it works internally.

martin-ueding commented 5 years ago

We have changed the parallelization direction, therefore memory is not an issue any more.