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98 lines
3.7 KiB
Markdown
98 lines
3.7 KiB
Markdown
# TODO
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## High priority
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## Medium priority
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* newer glommio versions might use SIGUSR1 internally, see glommio fe33e30
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* quit whole program if any thread panics
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* implement socket_recv_size and ipv6_only in glommio implementations
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* config: fail on unrecognized keys?
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* Run cargo-deny in CI
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* aquatic_http:
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* clean out connections regularly
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* handle like in aquatic_ws
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* Rc<RefCell<ValidUntil>> which get set on successful request parsing and
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successful response sending. Clone kept in connection slab which gets cleaned
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periodically (= cancel tasks). Means that task handle will need to be stored in slab.
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Config vars kill_idle_connections: bool, max_idle_connection_time. Remove keepalive.
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* handle panicked/cancelled tasks?
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* aquatic_ws
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* remove mio implementation when glommio issues fixed
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* glommio
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* RES memory still high after traffic stops, even if torrent maps and connection slabs go down to 0 len and capacity
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* replacing indexmap_amortized / simd_json with equivalents doesn't help
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* SinkExt::send maybe doesn't wake up properly?
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* related to https://github.com/sdroege/async-tungstenite/blob/master/src/compat.rs#L18 ?
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* extract_response_peers
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* don't assume requesting peer is in list?
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## Low priority
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* config
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* add flag to print parsed config when starting
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* aquatic_udp
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* look at proper cpu pinning (check that one thread gets bound per core)
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* then consider so_attach_reuseport_cbpf
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* what poll event capacity is actually needed?
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* stagger connection cleaning intervals?
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* load test
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* move additional request sending to for each received response, maybe
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with probability 0.2
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* aquatic_ws
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* glommio
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* proper cpu set pinning
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* general
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* large amount of temporary allocations in serialize_20_bytes, pretty many in deserialize_20_bytes
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* extract response peers: extract "one extra" to compensate for removal,
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of sender if present in selection?
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# Not important
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* aquatic_http:
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* optimize?
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* get_peer_addr only once (takes 1.2% of runtime)
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* queue response: allocating takes 2.8% of runtime
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* consider better error type for request parsing, so that better error
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messages can be sent back (e.g., "full scrapes are not supported")
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* test torrent transfer with real clients
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* scrape: does it work (serialization etc), and with multiple hashes?
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* 'left' optional in magnet requests? Probably not. Transmission sends huge
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positive number.
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* aquatic_ws
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* mio
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* shard torrent state. this could decrease dropped messages too, since
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request handlers won't send large batches of them
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* connection cleaning interval
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* use access list cache
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* use write event interest for handshakes too
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* deregistering before closing is required by mio, but it hurts performance
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* blocked on https://github.com/snapview/tungstenite-rs/issues/51
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* connection closing: send tls close message etc?
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* write new version of extract_response_peers which checks for equality with
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peer sending request???
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# Don't do
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* general: PGO didn't seem to help way back
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## aquatic_http
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* request from path:
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* deserialize 20 bytes: possibly rewrite (just check length of underlying
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bytes == 20 and then copy them), also maybe remove String from map for
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these cases too. doesn't really improve performance
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* crazy http parsing: check for newline with memchr, take slice until
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there. then iter over space newlines/just take relevant data. Not faster
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than httparse and a lot worse
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## aquatic_udp_protocol
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* Use `bytes` crate: seems to worsen performance somewhat
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* Zerocopy (https://docs.rs/zerocopy/0.3.0/zerocopy/index.html) for requests
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and responses. Doesn't improve performance
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