Ensure things happen in consistent order #151
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Looking good! Made some inline comments, and this needs a changelog.
It would also be nice if there was a test, but I have to admit I am struggling to think of a test that isn't trivial ... do you think this will end up getting tested in #70?
nengo_loihi/loihi_cx.py
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| @@ -1164,12 +1166,12 @@ def receive(self, t, x): | |||
| class ChipReceiveNode(nengo.Node): | |||
| """For receiving host->chip messages""" | |||
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| def __init__(self, dimensions, size_out): | |||
| def __init__(self, dimensions, size_out, **kwargs): | |||
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I think **kwargs is confusing here; for me, I don't really remember what other parameters there are to Node. If I look it up and see size_in, I'll get a TypeError if I try to specify it. I think we should bite the bullet and expose label and seed (or just label if seeds are irrelevant here).
nengo_loihi/loihi_cx.py
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| @@ -1190,6 +1192,7 @@ def collect_spikes(self): | |||
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| class ChipReceiveNeurons(ChipReceiveNode): | |||
| """Passes spikes directly (no on-off neuron encoding)""" | |||
| def __init__(self, dimensions, neuron_type=None): | |||
| def __init__(self, dimensions, neuron_type=None, **kwargs): | |||
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Here also, explicitly include label and (perhaps) seed.
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From the review: we should add a test that splits a model multiple times and ensures that their order in the split networks is the same. |
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I will write this test. |
hunse
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Ok, I've added a test. I've tested that it can distinguish between before this PR and after it. |
- Splitter preserves object order from original network. - Host/chip receivers are always called in same order. Also added optional labels to ChipReceiveNodes and their CxSpikeInputs.
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This makes sure that seeds are always set the same as well. Right now, setting a seed on a network does not actually guarantee it will be the same from one run to the next, because the splitter dictionaries change the order that everything gets built in in a non-deterministic way.