Report inference, forward, and network RPS separately #358
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borzunov
commented
Jul 16, 2023
| @@ -16,7 +16,7 @@ async def ping( | |||
| _dht: hivemind.DHT, | |||
| node: hivemind.dht.DHTNode, | |||
| *, | |||
| wait_timeout: float = 1, | |||
| wait_timeout: float = 5, | |||
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Peers that use relay may yield large first ping, but it'll be smoothed in future.
borzunov
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Jul 18, 2023
This PR: 1. **Adds shortest path routing for inference.** We build a graph with client-server and server-server latencies and compute costs, as well as empirically measured overheads. For client-server latencies, we ping possible first and last servers in a sequence in `SequenceManager.update()`. We penalize servers who may not have enough cache for our request. This uses info added to DHT in #355, #356, #358. 2. **Makes a server ping neighboring servers in addition to next ones.** This is to get an opportunity to change the server even before we use all its blocks (e.g., because a neighboring server is faster). This feature is not enabled though, since it increases graph size for N servers to O(N^2) - but we may enable it if needed. 3. **Fixes a `SequenceManager` bug with the first `update()`.** Previously, this update was likely to produce incorrect information and cause to `MissingBlocksErrors` until the next update happens.
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Inference RPS may be very different from forward RPS. E.g., currently bnb uses a completely different algorithm for NF4 inference. We report detailed RPS info that can be then used for shortest-path routing for inference.