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bench: add continuous stress test

Useful in tracking down or at least demonstrating memory leaks.
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1 parent 4e84dfa commit 12a90e98bfc347d78e622f0839898c065ed31dc1 @bnoordhuis bnoordhuis committed Apr 27, 2012
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  1. +127 −0 benchmark/http_bench.js
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127 benchmark/http_bench.js
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+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var spawn = require('child_process').spawn;
+var cluster = require('cluster');
+var http = require('http');
+
+var options = {
+ mode: 'master',
+ host: '127.0.0.1',
+ port: 22344,
+ path: '/',
+ servers: 1,
+ clients: 1
+};
+
+for (var i = 2; i < process.argv.length; ++i) {
+ var args = process.argv[i].split('=', 2);
+ var key = args[0];
+ var val = args[1];
+ options[key] = val;
+}
+
+switch (options.mode) {
+case 'master': startMaster(); break;
+case 'server': startServer(); break;
+case 'client': startClient(); break;
+default: throw new Error('Bad mode: ' + options.mode);
+}
+
+process.title = 'http_bench[' + options.mode + ']';
+
+// monkey-patch the log functions so they include name + pid
+console.log = patch(console.log);
+console.trace = patch(console.trace);
+console.error = patch(console.error);
+
+function patch(fun) {
+ var prefix = process.title + '[' + process.pid + '] ';
+ return function() {
+ var args = Array.prototype.slice.call(arguments);
+ args[0] = prefix + args[0];
+ return fun.apply(console, args);
+ };
+}
+
+function startMaster() {
+ if (!cluster.isMaster) return startServer();
+
+ for (var i = ~~options.servers; i > 0; --i) cluster.fork();
+
+ for (var i = ~~options.clients; i > 0; --i) {
+ var cp = spawn(process.execPath, [__filename, 'mode=client']);
+ cp.stdout.pipe(process.stdout);
+ cp.stderr.pipe(process.stderr);
+ }
+}
+
+function startServer() {
+ http.createServer(onRequest).listen(options.port, options.host);
+
+ var body = Array(1024).join('x');
+ var headers = {'Content-Length': '' + body.length};
+
+ function onRequest(req, res) {
+ req.on('error', onError);
+ res.on('error', onError);
+ res.writeHead(200, headers);
+ res.end(body);
+ }
+
+ function onError(err) {
+ console.error(err.stack);
+ }
+}
+
+function startClient() {
+ // send off a bunch of concurrent requests
+ // TODO make configurable
+ sendRequest();
+ sendRequest();
+
+ function sendRequest() {
+ var req = http.request(options, onConnection);
+ req.on('error', onError);
+ req.end();
+ }
+
+ // add a little back-off to prevent EADDRNOTAVAIL errors, it's pretty easy
+ // to exhaust the available port range
+ function relaxedSendRequest() {
+ setTimeout(sendRequest, 1);
+ }
+
+ function onConnection(res) {
+ res.on('error', onError);
+ res.on('data', onData);
+ res.on('end', relaxedSendRequest);
+ }
+
+ function onError(err) {
+ console.error(err.stack);
+ relaxedSendRequest();
+ }
+
+ function onData(data) {
+ // this space intentionally left blank
+ }
+}

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