Mercurial > hg > nginx-quic
view src/event/ngx_event_udp.h @ 8759:56dec0d4e5b1 quic
QUIC: avoid excessive buffer allocations in stream output.
Previously, when a few bytes were send to a QUIC stream by the application, a
4K buffer was allocated for these bytes. Then a STREAM frame was created and
that entire buffer was used as data for that frame. The frame with the buffer
were in use up until the frame was acked by client. Meanwhile, when more
bytes were send to the stream, more buffers were allocated and assigned as
data to newer STREAM frames. In this scenario most buffer memory is unused.
Now the unused part of the stream output buffer is available for further
stream output while earlier parts of the buffer are waiting to be acked.
This is achieved by splitting the output buffer.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Fri, 24 Dec 2021 18:13:51 +0300 |
parents | e7a2d3914877 |
children | ce6d9cf0f567 |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_UDP_H_INCLUDED_ #define _NGX_EVENT_UDP_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #if !(NGX_WIN32) #if ((NGX_HAVE_MSGHDR_MSG_CONTROL) \ && (NGX_HAVE_IP_SENDSRCADDR || NGX_HAVE_IP_RECVDSTADDR \ || NGX_HAVE_IP_PKTINFO \ || (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO))) #define NGX_HAVE_ADDRINFO_CMSG 1 #endif typedef struct { ngx_buf_t *buffer; struct sockaddr *sockaddr; socklen_t socklen; } ngx_udp_dgram_t; struct ngx_udp_connection_s { ngx_rbtree_node_t node; ngx_connection_t *connection; ngx_str_t key; ngx_udp_dgram_t *dgram; }; #if (NGX_HAVE_ADDRINFO_CMSG) typedef union { #if (NGX_HAVE_IP_SENDSRCADDR || NGX_HAVE_IP_RECVDSTADDR) struct in_addr addr; #endif #if (NGX_HAVE_IP_PKTINFO) struct in_pktinfo pkt; #endif #if (NGX_HAVE_INET6 && NGX_HAVE_IPV6_RECVPKTINFO) struct in6_pktinfo pkt6; #endif } ngx_addrinfo_t; size_t ngx_set_srcaddr_cmsg(struct cmsghdr *cmsg, struct sockaddr *local_sockaddr); ngx_int_t ngx_get_srcaddr_cmsg(struct cmsghdr *cmsg, struct sockaddr *local_sockaddr); #endif void ngx_event_recvmsg(ngx_event_t *ev); ssize_t ngx_sendmsg(ngx_connection_t *c, struct msghdr *msg, int flags); void ngx_udp_rbtree_insert_value(ngx_rbtree_node_t *temp, ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel); void ngx_insert_udp_connection(ngx_connection_t *c, ngx_udp_connection_t *udp, ngx_str_t *key); #endif void ngx_delete_udp_connection(void *data); #endif /* _NGX_EVENT_UDP_H_INCLUDED_ */