jiangzhuo

#!/usr/bin/env node
"use strict";

var debug = require('_debugger');
var c = new debug.Client();

function main() {
  console.log('requesting trace');
  c.reqBacktrace(function(err,trace) {
    if (!err) {

jiangzhuo

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel/kptr_restrict=0

perf record -i -g -e cycles:u -- ~/sources/node/node --perf-basic-prof script.js

perf script | egrep -v "( __libc_start| LazyCompile | v8::internal::| Builtin:| Stub:| LoadIC:|\[unknown\]| LoadPolymorphicIC:)" | sed 's/ LazyCompile:[*~]\?/ /' | ~/sources/FlameGraph/stackcollapse-perf.pl > out.perf-folded

jiangzhuo

// --- Compiling ---
$ wget http://download.redis.io/releases/redis-2.8.3.tar.gz
$ tar xzvf redis-2.8.3.tar.gz
$ cd redis-2.8.3
$ make
$ make install

// --- or using yum ---
$ rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
$ rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

jiangzhuo

#include <vector>
#include <assert.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>

typedef int32_t Score;
typedef int32_t UserId;
typedef int32_t Rank;
const Score kInvalidScore = -1;

jiangzhuo

var WebSocket = require('ws');
var Protocol = require('pomelo-protocol');
var Package = Protocol.Package;
var Message = Protocol.Message;
var EventEmitter = require('events').EventEmitter;
var protobuf = require('pomelo-protobuf');
var util = require('util');
var thunkify = require("thunkify");
var JS_WS_CLIENT_TYPE = 'js-websocket';
var JS_WS_CLIENT_VERSION = '0.0.1';