├── .gitignore ├── LICENSE ├── README.md ├── conf └── nginx.conf └── lua └── perf.lua /.gitignore: -------------------------------------------------------------------------------- 1 | logs/* 2 | *__temp/ 3 | 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # lua-performance-demo 2 | A demo using WRK and flame graph to locate OpenResty performance issues 3 | 4 | # using WRK for benchmark 5 | ```bash 6 | wrk -c100 -t10 -d20s http://127.0.0.1:8080 7 | ``` 8 | 9 | # using systemtap and stapxx to get flamegraph 10 | ```bash 11 | export PATH=/media/psf/Home/work/stapxx:/media/psf/Home/work/FlameGraph:/media/psf/Home/work/openresty-systemtap-toolkit:$PATH 12 | 13 | ./samples/lj-lua-stacks.sxx --arg time=5 --skip-badvars -x 4959 > a.bt 14 | 15 | stackcollapse-stap.pl a.bt > a.cbt 16 | 17 | flamegraph.pl --encoding="ISO-8859-1" \ 18 | --title="Lua-land on-CPU flamegraph" \ 19 | a.cbt > a.svg 20 | ``` 21 | -------------------------------------------------------------------------------- /conf/nginx.conf: -------------------------------------------------------------------------------- 1 | daemon on; 2 | master_process on; 3 | worker_processes 1; 4 | error_log logs/error.log warn; 5 | pid logs/nginx.pid; 6 | 7 | events { 8 | accept_mutex off; 9 | } 10 | 11 | http { 12 | lua_package_path "$prefix/lua/?.lua;;"; 13 | 14 | init_by_lua_block { 15 | require "perf".init() 16 | } 17 | 18 | server { 19 | listen 8080; 20 | 21 | location / { 22 | rewrite_by_lua_block { 23 | require "perf".run() 24 | } 25 | } 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /lua/perf.lua: -------------------------------------------------------------------------------- 1 | local math_random = math.random 2 | local table_concat = table.concat 3 | local new_tab = require "table.new" 4 | 5 | -- uri_charset 6 | local uri_charset = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ._~:/@!,;=+*-" 7 | local uri_charset_length = #uri_charset 8 | local uri_random_charset = {} 9 | 10 | for i = 1, uri_charset_length do 11 | uri_random_charset[i] = string.sub(uri_charset, i, i) 12 | end 13 | 14 | local _M = {} 15 | 16 | local function init() 17 | local seed = 0 18 | 19 | local frandom, err = io.open("/dev/urandom", "rb") 20 | if not frandom then 21 | ngx.log(ngx.WARN, 'failed to open /dev/urandom: ', err) 22 | else 23 | local str = frandom:read(4) 24 | frandom:close() 25 | if not str then 26 | ngx.log(ngx.WARN, 'failed to read data from /dev/urandom') 27 | else 28 | for i = 1, 4 do 29 | seed = 256 * seed + str:byte(i) 30 | end 31 | end 32 | end 33 | 34 | if seed == 0 then 35 | ngx.log(ngx.WARN, 'failed to get seed from urandom') 36 | seed = ngx.now() * 1000 + ngx.worker.pid() 37 | end 38 | 39 | math.randomseed(seed) 40 | end 41 | 42 | local function gen_uri_comp(body, len) 43 | local n = math_random(20) -- between 1 and 20 44 | for i = 1, n do 45 | len = len + 1 46 | body[len] = uri_random_charset[math_random(uri_charset_length)] 47 | end 48 | return len 49 | end 50 | 51 | local gen_body 52 | do 53 | local body = new_tab(1000 * 20, 0) 54 | 55 | function gen_body() 56 | local len = 0 57 | local n = math_random(1000) 58 | 59 | for i = 1, n do 60 | len = gen_uri_comp(body, len) 61 | len = len + 1 62 | body[len] = "=" 63 | len = gen_uri_comp(body, len) 64 | if i < n then 65 | len = len + 1 66 | body[len] = "&" 67 | end 68 | end 69 | return table_concat(body, "", 1, len) 70 | end 71 | 72 | end --do 73 | 74 | local function run() 75 | local response = gen_body() 76 | ngx.say(response) 77 | end 78 | 79 | _M.init = init 80 | _M.run = run 81 | return _M 82 | --------------------------------------------------------------------------------