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Pgrapher not deterministic. #241

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brettviren opened this issue Sep 6, 2023 · 0 comments
Open

Pgrapher not deterministic. #241

brettviren opened this issue Sep 6, 2023 · 0 comments

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@brettviren
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@HaiwangYu discovered that Pgrapher's use of a std::unordered_map with a pointer key leads to non-deterministic order of node execution between two otherwise identical jobs (same random seed).

This is probably the neighborhood of the problem:

https://github.com/WireCell/wire-cell-toolkit/blob/master/pgraph/src/Graph.cxx#L57

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