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111 lines
4 KiB
Markdown
111 lines
4 KiB
Markdown
# TODO
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* readme
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* document privilege dropping and cpu pinning
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* document access list log output levels and that it exits program
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on start if parsing fails
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* config
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* add flag to print parsed config when starting
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* fail on unrecognized keys
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* implement socket_recv_size and ipv6_only in glommio implementations
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* CI
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* file transfer CI for all implementations
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* test access lists?
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* cargo-deny
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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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* notes
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* load testing shows that with sharded state, mio reaches 1.4M responses per second
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with 6 socket and 4 request workers. performance is great overall and faster than
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without sharding. io_uring impl is a lot behind mio impl with new load tester
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* aquatic_http:
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* clean out connections regularly
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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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* 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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* use futures-rustls for load test
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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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* aquatic_ws
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* glommio
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* fix memory leak / huge growth
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## Less important
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* extract response peers: extract "one extra" to compensate for removal,
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of sender if present in selection? maybe make criterion benchmark,
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optimize
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## aquatic_http_load_test
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* how handle large number of peers for "popular" torrents in keepalive mode?
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maybe it is ok
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## aquatic_http
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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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* compact=0 should result in error response
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## aquatic_ws_load_test
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* very small amount of connections means very small number of peers per
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torrents, so tracker handling of large number is not really assessed
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## aquatic_udp
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* use key from request as part of peer map key like in aquatic_http? need to
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check protocol specification
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# Not important
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## General
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* have main thread wait for any of the threads returning, quit
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if that is the since since it means a panic occured
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## aquatic_ws
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* write new version of extract_response_peers which checks for equality with
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peer sending request? It could return an arrayvec or smallvec by the way
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(but then the size needs to be adjusted together with the corresponding
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config var, or the config var needs to be removed)
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## aquatic_udp
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* Does it really make sense to include peer address in peer map key? I have
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to think about why I included it in the first place.
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## aquatic_udp_protocol
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* Don't do endian conversion where unnecessary, such as for connection id and
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transaction id?
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## aquatic_cli_helpers
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* Include config field comments in exported toml (likely quite a bit of work)
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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 work on Vec etc
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