Mercurial > hg > nginx
annotate src/os/unix/ngx_alloc.h @ 9143:48691bab4474
QUIC: fixed probe-congestion deadlock.
When probe timeout expired while congestion window was exhausted, probe PINGs
could not be sent. As a result, lost packets could not be declared lost and
congestion window could not be freed for new packets. This deadlock
continued until connection idle timeout expiration.
Now PINGs are sent separately from the frame queue without congestion control,
as specified by RFC 9002, Section 7:
An endpoint MUST NOT send a packet if it would cause bytes_in_flight
(see Appendix B.2) to be larger than the congestion window, unless the
packet is sent on a PTO timer expiration (see Section 6.2) or when entering
recovery (see Section 7.3.2).
author | Roman Arutyunyan <arut@nginx.com> |
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date | Mon, 14 Aug 2023 08:28:30 +0400 |
parents | d620f497c50f |
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rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #ifndef _NGX_ALLOC_H_INCLUDED_ |
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9 #define _NGX_ALLOC_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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13 #include <ngx_core.h> |
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16 void *ngx_alloc(size_t size, ngx_log_t *log); |
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17 void *ngx_calloc(size_t size, ngx_log_t *log); |
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18 |
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19 #define ngx_free free |
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22 /* |
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23 * Linux has memalign() or posix_memalign() |
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24 * Solaris has memalign() |
2129 | 25 * FreeBSD 7.0 has posix_memalign(), besides, early version's malloc() |
26 * aligns allocations bigger than page size at the page boundary | |
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27 */ |
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469 | 29 #if (NGX_HAVE_POSIX_MEMALIGN || NGX_HAVE_MEMALIGN) |
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31 void *ngx_memalign(size_t alignment, size_t size, ngx_log_t *log); |
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33 #else |
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35 #define ngx_memalign(alignment, size, log) ngx_alloc(size, log) |
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37 #endif |
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40 extern ngx_uint_t ngx_pagesize; |
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41 extern ngx_uint_t ngx_pagesize_shift; |
589 | 42 extern ngx_uint_t ngx_cacheline_size; |
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45 #endif /* _NGX_ALLOC_H_INCLUDED_ */ |