Mercurial > hg > nginx-quic
view src/http/v3/ngx_http_v3_uni.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> |
|---|---|
| date | Fri, 24 Dec 2021 18:13:51 +0300 |
| parents | 18d23ed15eef |
| children |
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/* * Copyright (C) Roman Arutyunyan * Copyright (C) Nginx, Inc. */ #ifndef _NGX_HTTP_V3_UNI_H_INCLUDED_ #define _NGX_HTTP_V3_UNI_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> void ngx_http_v3_init_uni_stream(ngx_connection_t *c); ngx_int_t ngx_http_v3_register_uni_stream(ngx_connection_t *c, uint64_t type); ngx_connection_t *ngx_http_v3_create_push_stream(ngx_connection_t *c, uint64_t push_id); ngx_int_t ngx_http_v3_set_max_push_id(ngx_connection_t *c, uint64_t max_push_id); ngx_int_t ngx_http_v3_goaway(ngx_connection_t *c, uint64_t push_id); ngx_int_t ngx_http_v3_cancel_push(ngx_connection_t *c, uint64_t push_id); ngx_int_t ngx_http_v3_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id); ngx_int_t ngx_http_v3_send_settings(ngx_connection_t *c); ngx_int_t ngx_http_v3_send_goaway(ngx_connection_t *c, uint64_t id); ngx_int_t ngx_http_v3_send_ack_section(ngx_connection_t *c, ngx_uint_t stream_id); ngx_int_t ngx_http_v3_send_cancel_stream(ngx_connection_t *c, ngx_uint_t stream_id); ngx_int_t ngx_http_v3_send_inc_insert_count(ngx_connection_t *c, ngx_uint_t inc); #endif /* _NGX_HTTP_V3_UNI_H_INCLUDED_ */