julianknodt fe54721e31 derp: add pkt queue latency timer ...

It would be useful to know the time that packets spend inside of a queue before they are sent
off, as that can be indicative of the load the server is handling (and there was also an
existing TODO). This adds a simple exponential moving average metric to track the average packet
queue duration.
Changes during review:
Add CAS loop for recording queue timing w/ expvar.Func, rm snake_case, annotate in milliseconds,
convert

Signed-off-by: julianknodt <julianknodt@gmail.com>

2021-06-11 09:41:06 -07:00

..

derphttp

derp{,/derphttp},magicsock: tell DERP server when ping acks can be expected

2021-03-12 09:55:02 -08:00

derpmap

derp/derpmap: add São Paulo (derp11)

2021-04-21 11:04:47 -07:00

derp_client.go

derp: return keep-alive message up to callers

2021-03-15 10:43:48 -07:00

derp_server.go

derp: add pkt queue latency timer

2021-06-11 09:41:06 -07:00

derp_test.go

derp: handle net.ErrClosed in TestSendFreeze

2021-04-12 15:23:36 -07:00

derp.go

wgengine/magicsock, derp, derp/derphttp: respond to DERP server->client pings

2021-03-09 13:56:13 -08:00