Mercurial > hg > nginx
annotate src/os/unix/ngx_thread_id.c @ 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 | 466bd63b63d1 |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 * Copyright (C) Nginx, Inc. |
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_thread_pool.h> |
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11 |
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12 |
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13 #if (NGX_LINUX) |
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14 |
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15 /* |
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16 * Linux thread id is a pid of thread created by clone(2), |
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17 * glibc does not provide a wrapper for gettid(). |
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18 */ |
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19 |
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20 ngx_tid_t |
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21 ngx_thread_tid(void) |
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22 { |
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23 return syscall(SYS_gettid); |
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24 } |
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25 |
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26 #elif (NGX_FREEBSD) && (__FreeBSD_version >= 900031) |
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27 |
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28 #include <pthread_np.h> |
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29 |
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30 ngx_tid_t |
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31 ngx_thread_tid(void) |
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32 { |
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33 return pthread_getthreadid_np(); |
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34 } |
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35 |
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36 #elif (NGX_DARWIN) |
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37 |
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38 /* |
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39 * MacOSX thread has two thread ids: |
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40 * |
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41 * 1) MacOSX 10.6 (Snow Leoprad) has pthread_threadid_np() returning |
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42 * an uint64_t value, which is obtained using the __thread_selfid() |
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43 * syscall. It is a number above 300,000. |
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44 */ |
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45 |
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46 ngx_tid_t |
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47 ngx_thread_tid(void) |
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48 { |
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49 uint64_t tid; |
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50 |
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51 (void) pthread_threadid_np(NULL, &tid); |
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52 return tid; |
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53 } |
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54 |
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55 /* |
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56 * 2) Kernel thread mach_port_t returned by pthread_mach_thread_np(). |
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57 * It is a number in range 100-100,000. |
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58 * |
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59 * return pthread_mach_thread_np(pthread_self()); |
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60 */ |
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61 |
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62 #else |
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63 |
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64 ngx_tid_t |
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65 ngx_thread_tid(void) |
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66 { |
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67 return (uint64_t) (uintptr_t) pthread_self(); |
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68 } |
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69 |
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70 #endif |