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BirchWoodGodandClaude Opus 5.5
313a1d63c8
display.latency_meter (HALO_LATENCY_METER, default false) shows this
machine's round trip to the host at the screen's top right while a network
game is played: "Ping 45 ms" with four bars drawn as quads, green below
80 ms, yellow below 150, red from 150. The host shows "Max ping", its
slowest client's. A client that has heard nothing from the host for two
seconds shows "Connection problem", pulsing; the host logs a client silent
as long. It is not drawn in the menus, after the game, over a co-op
cutscene (but a connection problem), or when the host plays alone. It is a
setting, off, because the stock HUD has no such meter; only in config.toml.
Nothing more is sent, so the network version stays 29. The meter reuses
the round trips the distributed netcode already takes: the host each
client's from the host tick its input names, a client its own from the
client tick the host's state of its player (or, driving, its vehicle)
names. Those are counted in ticks; the meter times the same echoes in
milliseconds by when this machine sent the tick they name (the last 64
ticks' send times kept), smoothed as TCP smooths its own. A client also
notes when the host's latest message came. All machines, system link,
internet play's tunnel and a browser's WebRTC channel alike, carry these
messages, so the meter reads the same over each. What is shown is
refreshed in the tick twice a second, and only with the setting on;
halo.log then has the round trips every ten seconds ("latency: ...") and
each connection problem as it starts and ends.
Ported from the Halo CE for PS Vita port (BirchWoodGod, contributed under
CC0), where it is on by default.
Checked: Linux debug and release, web and Android debug and release
build; tools/network_format.py: the wire format is the one recorded. A
system link host and joiner in a network namespace with netem's 40 ms each
way: the meter read 89-123 ms on the joiner and 94-128 ms on the host (80
ms of network and each machine's wait for its next tick); all traffic
dropped for 5 s: "Connection problem" on the joiner after
2247 ms, the host "Max ping 2980 ms" in red and its log "machine 1 silent
for 2190 ms", both heard again after the blackout. On loopback with no
delay: 25-35 ms. With the setting off, the game logs the same lines as
origin/main (numbers apart) and config.toml differs only by the new
setting.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011ucYZ9cvWn3nrnk7kK3S5X