Mercurial > hg > nginx
view src/event/quic/ngx_event_quic_migration.h @ 8946:56dec0d4e5b1 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> |
---|---|
date | Fri, 24 Dec 2021 18:13:51 +0300 |
parents | ddd5e5c0f87d |
children | 1e2f4e9c8195 |
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/* * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_ #define _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #define NGX_QUIC_PATH_RETRIES 3 #define NGX_QUIC_PATH_NEW 0 #define NGX_QUIC_PATH_VALIDATING 1 #define NGX_QUIC_PATH_VALIDATED 2 #define ngx_quic_path_state_str(p) \ ((p)->state == NGX_QUIC_PATH_NEW) ? "new" : \ (((p)->state == NGX_QUIC_PATH_VALIDATED) ? "validated" : "validating") ngx_int_t ngx_quic_handle_path_challenge_frame(ngx_connection_t *c, ngx_quic_path_challenge_frame_t *f); ngx_int_t ngx_quic_handle_path_response_frame(ngx_connection_t *c, ngx_quic_path_challenge_frame_t *f); ngx_quic_path_t *ngx_quic_find_path(ngx_connection_t *c, struct sockaddr *sockaddr, socklen_t socklen); ngx_quic_path_t *ngx_quic_add_path(ngx_connection_t *c, struct sockaddr *sockaddr, socklen_t socklen); ngx_int_t ngx_quic_update_paths(ngx_connection_t *c, ngx_quic_header_t *pkt); ngx_int_t ngx_quic_handle_migration(ngx_connection_t *c, ngx_quic_header_t *pkt); void ngx_quic_path_validation_handler(ngx_event_t *ev); #endif /* _NGX_EVENT_QUIC_MIGRATION_H_INCLUDED_ */