Brad Fitzpatrick 30f5d94808 derp/derpserver: pool per-client send queue buffers ...

Each connected client held two buffered channels of 32 pkts each (its
regular and disco send queues), about 5.5 KB per client for the
lifetime of the connection, even though almost all clients are idle at
any given moment.

Replace the channels with pktQueue, a mutex-guarded ring buffer whose
backing array comes from a per-server sync.Pool on first enqueue and
goes back when the queue drains empty, so an idle client holds no
queue memory at all. Enqueuers wake the client's sendLoop through a
one-slot channel.

Updates #21064

Change-Id: I2d7e8f4a1b6c3950e2a7d4b8f1c5e3a9d6b0c2e4
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

2026-09-15 12:10:16 -07:00

..

testdata

derp/derpserver: split off derp.Server out of derp into its own package

2025-09-24 09:19:01 -07:00

derpserver_default.go

all: remove AUTHORS file and references to it

2026-01-23 15:49:45 -08:00

derpserver_linux.go

derp/derpserver: serve hijacked connections on their own goroutine

2026-09-08 11:26:05 -07:00

derpserver_test.go

derp/derpserver: pool per-client send queue buffers

2026-09-15 12:10:16 -07:00

derpserver.go

derp/derpserver: pool per-client send queue buffers

2026-09-15 12:10:16 -07:00

fortest.go

derp, wgengine: let clients advertise an opaque app name to DERP servers

2026-07-20 07:33:44 -07:00

handler_test.go

derp/derpserver: serve hijacked connections on their own goroutine

2026-09-08 11:26:05 -07:00

handler.go

derp/derpserver: serve hijacked connections on their own goroutine

2026-09-08 11:26:05 -07:00

websocket.go

tstest/integration/jswasmtest: add headless-Chromium tests for @tailscale/connect

2026-05-20 10:48:29 -07:00