From d9e0b6870201d9200b3c225903b43b850475600b Mon Sep 17 00:00:00 2001 From: eunhhu Date: Wed, 30 Sep 2026 03:32:07 +0100 Subject: Hold a window of each output's sends in its transport, not the outbox A link's ring and a wire's queue took every saved send of their output and kept it until delivered: with the receiver down they held the outbox a second time, 178 B and 313 B more a send (104). Each outlet now holds a window, --window bytes (4 MiB) and 65,536 sends past what its receiver has, at least one; the outbox keeps the rest. The owner remembers each outlet's place in the outbox and looks on from there after a save and after its transports deliver. Places move back by the sends that left the outbox since (PureApp.sends_gone), so a trim before a place skips nothing, and sends queued before are not looked at again however many wait. pure_app_sent reads a send by its place (the newest-first visit it replaces is gone); pure_link_held and pure_wire_held say what a transport holds. With the receiver down a node now grows by the outbox alone once the window is full: 219 and 218 B a send over the link and HTTP (399 and 534 B before). check.py server_windows keeps the receivers of a sender's two outputs, one linked and one over HTTP, down through 300 buys with a 2,000-byte window, then starts them: each applies all 300 once. Without the refill after deliveries the link stops at 117. --- link/link.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'link/link.h') diff --git a/link/link.h b/link/link.h index 3390a82..64846ce 100644 --- a/link/link.h +++ b/link/link.h @@ -22,6 +22,8 @@ bool pure_link_queue(PureLink *, uint64_t seq, const unsigned char *bytes, size_ uint64_t pure_link_queued(PureLink *); /* The last number the receiver saved; any thread. */ uint64_t pure_link_delivered(PureLink *); +/* The bytes of the sends queued and not yet saved; any thread. */ +size_t pure_link_held(PureLink *); /* Packets go in bursts with UDP GSO where the system has it (at first); * off, each in a call of its own: for a path whose queues take a burst as * one packet (netem does). Before pure_link_start. */ -- cgit v1.2.3