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Add high performance threaded webserver example
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Justine Tunney
parent
80b211e314
commit
178a6da4b9
2 changed files with 284 additions and 4 deletions
284
examples/greenbean.c
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284
examples/greenbean.c
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/sigbits.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/calls/struct/timespec.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/log/check.h"
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#include "libc/log/log.h"
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#include "libc/mem/mem.h"
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#include "libc/sock/goodsocket.internal.h"
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#include "libc/sock/sock.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/af.h"
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#include "libc/sysv/consts/clock.h"
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#include "libc/sysv/consts/clone.h"
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#include "libc/sysv/consts/ipproto.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/sysv/consts/rlimit.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/consts/so.h"
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#include "libc/sysv/consts/sock.h"
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#include "libc/sysv/consts/sol.h"
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#include "libc/sysv/consts/tcp.h"
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#include "libc/time/struct/tm.h"
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#include "libc/time/time.h"
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#include "net/http/http.h"
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#include "net/http/url.h"
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/**
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* @fileoverview greenbean lightweighht threaded web server
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*
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* $ make -j8 o//tool/net/greenbean.com
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* $ o//tool/net/greenbean.com &
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* $ printf 'GET /\n\n' | nc 127.0.0.1 8080
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* HTTP/1.1 200 OK
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* Server: greenbean/1.o
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* Referrer-Policy: origin
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* Cache-Control: private; max-age=0
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* Content-Type: text/html; charset=utf-8
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* Date: Sat, 14 May 2022 14:13:07 GMT
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* Content-Length: 118
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*
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* <!doctype html>
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* <title>hello world</title>
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* <h1>hello world</h1>
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* <p>this is a fun webpage
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* <p>hosted by greenbean
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*
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* Like redbean, greenbean has superior performance too, with an
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* advantage on benchmarks biased towards high connection counts
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*
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* $ sudo wrk -c 300 -t 32 --latency http://127.0.0.1:8080/
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* Running 10s test @ http://127.0.0.1:8080/
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* 32 threads and 300 connections
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* Thread Stats Avg Stdev Max +/- Stdev
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* Latency 36.21us 133.39us 8.10ms 98.52%
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* Req/Sec 73.24k 28.92k 131.06k 47.49%
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* Latency Distribution
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* 50% 22.00us
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* 75% 29.00us
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* 90% 40.00us
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* 99% 333.00us
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* 4356560 requests in 4.62s, 1.29GB read
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* Requests/sec: 942663.73
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* Transfer/sec: 284.98MB
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*
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*/
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#define THREADS 32
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#define HEARTBEAT 500
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#define KEEPALIVE 5000
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#define LOGGING 0
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#define STANDARD_RESPONSE_HEADERS \
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"Server: greenbean/1.o\r\n" \
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"Referrer-Policy: origin\r\n" \
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"Cache-Control: private; max-age=0\r\n"
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int workers;
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int barrier;
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int closingtime;
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int Worker(void *id) {
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int server, itsover, ready, yes = 1;
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// announce to the main process this has spawned
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kprintf(" #%.2ld", (intptr_t)id);
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__atomic_add_fetch(&workers, 1, __ATOMIC_SEQ_CST);
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// wait for all threads to spawn before we proceed
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for (;;) {
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__atomic_load(&barrier, &ready, __ATOMIC_SEQ_CST);
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if (ready) break;
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__builtin_ia32_pause();
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}
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// load balance incoming connections for port 8080 across all threads
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// hangup on any browser clients that lag for more than a few seconds
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struct timeval timeo = {KEEPALIVE / 1000, KEEPALIVE % 1000};
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struct sockaddr_in addr = {.sin_family = AF_INET, .sin_port = htons(8080)};
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CHECK_NE(-1, (server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)));
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setsockopt(server, SOL_SOCKET, SO_RCVTIMEO, &timeo, sizeof(timeo));
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setsockopt(server, SOL_SOCKET, SO_SNDTIMEO, &timeo, sizeof(timeo));
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setsockopt(server, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
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setsockopt(server, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes));
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setsockopt(server, SOL_TCP, TCP_FASTOPEN, &yes, sizeof(yes));
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setsockopt(server, SOL_TCP, TCP_QUICKACK, &yes, sizeof(yes));
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CHECK_EQ(0, bind(server, &addr, sizeof(addr)));
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CHECK_EQ(0, listen(server, 10));
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// connection loop
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for (;;) {
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struct tm tm;
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int64_t unixts;
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struct Url url;
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ssize_t got, sent;
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struct timespec ts;
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struct HttpMessage msg;
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uint32_t clientaddrsize;
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struct sockaddr_in clientaddr;
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char inbuf[1500], outbuf[512], *p, *q;
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int clientip, client, inmsglen, outmsglen;
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// wait for client connection
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clientaddrsize = sizeof(clientaddr);
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client = accept(server, &clientaddr, &clientaddrsize);
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// accept() can raise a very diverse number of errors but none of
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// them are really true showstoppers that would necessitate us to
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// panic and abort the entire server, so we can just ignore these
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if (client == -1) {
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// we used SO_RCVTIMEO and SO_SNDTIMEO because those settings are
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// inherited by the accepted sockets, but using them also has the
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// side-effect that the listening socket fails with EAGAIN, every
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// several seconds. we can use that to our advantage to check for
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// the ctrl-c shutdown event; otherwise, we retry the accept call
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__atomic_load(&closingtime, &itsover, __ATOMIC_SEQ_CST);
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if (itsover) break;
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continue;
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}
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// message loop
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do {
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// parse the incoming http message
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InitHttpMessage(&msg, kHttpRequest);
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// we're not terrible concerned when errors happen here
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if ((got = read(client, inbuf, sizeof(inbuf))) <= 0) break;
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// check that client message wasn't fragmented into more reads
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if (!(inmsglen = ParseHttpMessage(&msg, inbuf, got))) break;
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#if LOGGING
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// log the incoming http message
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clientip = ntohl(clientaddr.sin_addr.s_addr);
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kprintf("#%.2ld get some %d.%d.%d.%d:%d %#.*s\n", (intptr_t)id,
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(clientip & 0xff000000) >> 030, (clientip & 0x00ff0000) >> 020,
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(clientip & 0x0000ff00) >> 010, (clientip & 0x000000ff) >> 000,
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ntohs(clientaddr.sin_port), msg.uri.b - msg.uri.a,
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inbuf + msg.uri.a);
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#endif
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// display hello world html page for http://127.0.0.1:8080/
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if (msg.method == kHttpGet &&
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(msg.uri.b - msg.uri.a == 1 && inbuf[msg.uri.a + 0] == '/')) {
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q = "<!doctype html>\r\n"
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"<title>hello world</title>\r\n"
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"<h1>hello world</h1>\r\n"
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"<p>this is a fun webpage\r\n"
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"<p>hosted by greenbean\r\n";
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p = stpcpy(outbuf, "HTTP/1.1 200 OK\r\n" STANDARD_RESPONSE_HEADERS
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"Content-Type: text/html; charset=utf-8\r\n"
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"Date: ");
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clock_gettime(CLOCK_REALTIME, &ts), unixts = ts.tv_sec;
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p = FormatHttpDateTime(p, gmtime_r(&unixts, &tm));
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p = stpcpy(p, "\r\nContent-Length: ");
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p = FormatInt32(p, strlen(q));
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p = stpcpy(p, "\r\n\r\n");
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p = stpcpy(p, q);
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outmsglen = p - outbuf;
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sent = write(client, outbuf, outmsglen);
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} else {
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// display 404 not found error page for every thing else
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q = "<!doctype html>\r\n"
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"<title>404 not found</title>\r\n"
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"<h1>404 not found</h1>\r\n";
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p = stpcpy(outbuf,
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"HTTP/1.1 404 Not Found\r\n" STANDARD_RESPONSE_HEADERS
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"Content-Type: text/html; charset=utf-8\r\n"
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"Date: ");
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clock_gettime(CLOCK_REALTIME, &ts), unixts = ts.tv_sec;
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p = FormatHttpDateTime(p, gmtime_r(&unixts, &tm));
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p = stpcpy(p, "\r\nContent-Length: ");
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p = FormatInt32(p, strlen(q));
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p = stpcpy(p, "\r\n\r\n");
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p = stpcpy(p, q);
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outmsglen = p - outbuf;
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sent = write(client, outbuf, p - outbuf);
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}
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// if the client isn't pipelining and write() wrote the full
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// amount, then since we sent the content length and checked
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// that the client didn't attach a payload, we are so synced
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// thus we can safely process more messages
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} while (got == inmsglen && sent == outmsglen &&
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!msg.headers[kHttpContentLength].a &&
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!msg.headers[kHttpTransferEncoding].a &&
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(msg.method == kHttpGet || msg.method == kHttpHead));
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DestroyHttpMessage(&msg);
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close(client);
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}
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// inform the parent that this clone has finished
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close(server);
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kprintf(" #%.2ld", (intptr_t)id);
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__atomic_sub_fetch(&workers, 1, __ATOMIC_SEQ_CST);
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return 0;
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}
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void OnCtrlC(int sig) {
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closingtime = true;
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}
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int main(int argc, char *argv[]) {
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int64_t loadtzdbearly;
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int i, gotsome, haveleft, ready = 1;
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ShowCrashReports();
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kprintf("welcome to greenbean\n");
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gmtime(&loadtzdbearly);
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// spawn a bunch of threads
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for (i = 0; i < THREADS; ++i) {
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void *stack = mmap(0, 65536, PROT_READ | PROT_WRITE,
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MAP_STACK | MAP_ANONYMOUS, -1, 0);
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clone(Worker, stack, 65536,
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CLONE_THREAD | CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND,
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(void *)(intptr_t)i, 0, 0, 0, 0);
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}
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// wait for all threads to spawn
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for (;;) {
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__atomic_load(&workers, &gotsome, __ATOMIC_SEQ_CST);
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if (workers == THREADS) break;
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__builtin_ia32_pause();
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}
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// all threads are spawned so unleash the barrier
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kprintf("\ngreenbean is ready to go\n");
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sigaction(SIGINT, &(struct sigaction){.sa_handler = OnCtrlC}, 0);
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__atomic_store(&barrier, &ready, __ATOMIC_SEQ_CST);
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// main process does nothing until it's closing time
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for (;;) {
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__atomic_load(&workers, &haveleft, __ATOMIC_SEQ_CST);
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if (!haveleft) break;
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__builtin_ia32_pause();
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if (usleep(HEARTBEAT * 1000) == -1 && closingtime) {
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kprintf("\rgreenbean is shutting down...\n");
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}
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}
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kprintf("\n");
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kprintf("thank you for flying greenbean\n");
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}
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@ -110,10 +110,6 @@ TEST(rand64, testThreadSafety_doesntProduceIdenticalValues) {
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EXPECT_NE(A[i], A[j], "i=%d j=%d", i, j);
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}
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}
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for (i = 0; i < THREADS; ++i) {
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tkill(tid[i], SIGKILL);
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errno = 0;
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}
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for (i = 0; i < THREADS; ++i) {
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EXPECT_SYS(0, 0, munmap(stacks[i], GetStackSize()));
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}
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