Mercurial > hg > nginx
annotate auto/os/darwin @ 9138:a90f79792b5d
QUIC: optimized ACK delay.
Previously ACK was not generated if max_ack_delay was not yet expired and the
number of unacknowledged ack-eliciting packets was less than two, as allowed by
RFC 9000 13.2.1-13.2.2. However this only makes sense to avoid sending ACK-only
packets, as explained by the RFC:
On the other hand, reducing the frequency of packets that carry only
acknowledgments reduces packet transmission and processing cost at both
endpoints.
Now ACK is delayed only if output frame queue is empty. Otherwise ACK is sent
immediately, which significantly improves QUIC performance with certain tests.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Thu, 27 Jul 2023 16:37:17 +0400 |
parents | 9fb994513776 |
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1 |
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2 # Copyright (C) Igor Sysoev |
4412 | 3 # Copyright (C) Nginx, Inc. |
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4 |
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5 |
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6 have=NGX_DARWIN . auto/have_headers |
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7 |
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8 CORE_INCS="$UNIX_INCS" |
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9 CORE_DEPS="$UNIX_DEPS $DARWIN_DEPS" |
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10 CORE_SRCS="$UNIX_SRCS $DARWIN_SRCS" |
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11 |
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12 |
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13 |
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14 ngx_spacer=' |
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15 ' |
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16 |
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18 MODULE_LINK="-shared -Wl,-undefined,dynamic_lookup" | |
19 | |
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20 CC_AUX_FLAGS="$CC_AUX_FLAGS -D__APPLE_USE_RFC_3542" |
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21 |
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22 |
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23 # kqueue |
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24 |
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25 echo " + kqueue found" |
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26 have=NGX_HAVE_KQUEUE . auto/have |
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27 have=NGX_HAVE_CLEAR_EVENT . auto/have |
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28 EVENT_MODULES="$EVENT_MODULES $KQUEUE_MODULE" |
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29 CORE_SRCS="$CORE_SRCS $KQUEUE_SRCS" |
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30 EVENT_FOUND=YES |
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31 NGX_KQUEUE_CHECKED=YES |
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32 |
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33 ngx_feature="kqueue's EVFILT_TIMER" |
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34 ngx_feature_name="NGX_HAVE_TIMER_EVENT" |
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35 ngx_feature_run=yes |
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36 ngx_feature_incs="#include <sys/event.h> |
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37 #include <sys/time.h>" |
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38 ngx_feature_path= |
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39 ngx_feature_libs= |
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40 ngx_feature_test="int kq; |
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41 struct kevent kev; |
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42 struct timespec ts; |
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43 |
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44 if ((kq = kqueue()) == -1) return 1; |
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45 |
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46 kev.ident = 0; |
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47 kev.filter = EVFILT_TIMER; |
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48 kev.flags = EV_ADD|EV_ENABLE; |
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49 kev.fflags = 0; |
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50 kev.data = 1000; |
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51 kev.udata = 0; |
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52 |
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53 ts.tv_sec = 0; |
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54 ts.tv_nsec = 0; |
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55 |
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56 if (kevent(kq, &kev, 1, &kev, 1, &ts) == -1) return 1; |
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57 |
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58 if (kev.flags & EV_ERROR) return 1;" |
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59 |
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60 . auto/feature |
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61 |
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62 |
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63 ngx_feature="Darwin 64-bit kqueue millisecond timeout bug" |
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64 ngx_feature_name=NGX_DARWIN_KEVENT_BUG |
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65 ngx_feature_run=bug |
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66 ngx_feature_incs="#include <sys/event.h> |
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67 #include <sys/time.h>" |
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68 ngx_feature_path= |
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69 ngx_feature_libs= |
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70 ngx_feature_test="int kq; |
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71 struct kevent kev; |
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72 struct timespec ts; |
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73 struct timeval tv, tv0; |
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74 |
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75 kq = kqueue(); |
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76 |
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77 ts.tv_sec = 0; |
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78 ts.tv_nsec = 999000000; |
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79 |
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80 gettimeofday(&tv, 0); |
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81 kevent(kq, NULL, 0, &kev, 1, &ts); |
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82 gettimeofday(&tv0, 0); |
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83 timersub(&tv0, &tv, &tv); |
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84 |
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85 if (tv.tv_sec * 1000000 + tv.tv_usec < 900000) return 1;" |
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86 |
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87 . auto/feature |
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88 |
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89 |
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90 # sendfile() |
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91 |
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92 ngx_feature="sendfile()" |
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93 ngx_feature_name="NGX_HAVE_SENDFILE" |
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94 ngx_feature_run=yes |
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95 ngx_feature_incs="#include <sys/types.h> |
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96 #include <sys/socket.h> |
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97 #include <sys/uio.h> |
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98 #include <sys/errno.h>" |
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99 ngx_feature_path= |
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100 ngx_feature_libs= |
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101 ngx_feature_test="int s = 0, fd = 1; |
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102 off_t n; off_t off = 0; |
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103 n = sendfile(s, fd, off, &n, NULL, 0); |
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104 if (n == -1 && errno == ENOSYS) return 1" |
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105 . auto/feature |
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106 |
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107 if [ $ngx_found = yes ]; then |
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108 CORE_SRCS="$CORE_SRCS $DARWIN_SENDFILE_SRCS" |
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109 fi |
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110 |
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111 |
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112 ngx_feature="atomic(3)" |
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113 ngx_feature_name=NGX_DARWIN_ATOMIC |
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114 ngx_feature_run=no |
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115 ngx_feature_incs="#include <libkern/OSAtomic.h>" |
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116 ngx_feature_path= |
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117 ngx_feature_libs= |
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118 ngx_feature_test="int32_t lock = 0; |
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119 if (!OSAtomicCompareAndSwap32Barrier(0, 1, &lock)) return 1" |
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120 . auto/feature |