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annotate mod_statistics/stats.lib.lua @ 1081:3e2c4f424797

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mod_statistics: Remove expensive and non-portable /proc-based memory stats
author Matthew Wild <mwild1@gmail.com>
date Sat, 15 Jun 2013 22:07:35 +0100
parents 3af947e2e6d4
children 2733cb8c82a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local it = require "util.iterators";
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2 local log = require "util.logger".init("stats");
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3 local has_pposix, pposix = pcall(require, "util.pposix");
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4 local human;
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5 do
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6 local tostring = tostring;
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7 local s_format = string.format;
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8 local m_floor = math.floor;
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9 local m_max = math.max;
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10 local prefixes = "kMGTPEZY";
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11 local multiplier = 1024;
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12
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13 function human(num)
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14 num = tonumber(num) or 0;
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15 local m = 0;
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16 while num >= multiplier and m < #prefixes do
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17 num = num / multiplier;
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18 m = m + 1;
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19 end
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20
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21 return s_format("%0."..m_max(0,3-#tostring(m_floor(num))).."f%sB",
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22 num, m > 0 and (prefixes:sub(m,m) .. "i") or "");
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23 end
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24 end
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25
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26 local last_cpu_wall, last_cpu_clock;
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27 local get_time = require "socket".gettime;
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28
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29 local active_sessions, active_jids = {}, {};
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30 local c2s_sessions, s2s_sessions;
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31 if prosody and prosody.arg then
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32 c2s_sessions, s2s_sessions = module:shared("/*/c2s/sessions", "/*/s2s/sessions");
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33 end
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34
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35 local stats = {
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36 total_users = {
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37 get = function () return it.count(it.keys(bare_sessions)); end
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38 };
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39 total_c2s = {
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40 get = function () return it.count(it.keys(full_sessions)); end
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41 };
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42 total_s2sin = {
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43 get = function () local i = 0; for conn,sess in next,s2s_sessions do if sess.direction == "incoming" then i = i + 1 end end return i end
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44 };
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45 total_s2sout = {
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46 get = function () local i = 0; for conn,sess in next,s2s_sessions do if sess.direction == "outgoing" then i = i + 1 end end return i end
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47 };
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48 total_s2s = {
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49 get = function () return it.count(it.keys(s2s_sessions)); end
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50 };
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51 total_component = {
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52 get = function ()
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53 local count = 0;
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54 for host, host_session in pairs(hosts) do
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55 if host_session.type == "component" then
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56 local c = host_session.modules.component;
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57 if c and c.connected then -- 0.9 only
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58 count = count + 1;
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59 end
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60 end
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61 end
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62 return count;
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63 end
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64 };
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65 up_since = {
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66 get = function () return prosody.start_time; end;
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67 tostring = function (up_since)
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68 return tostring(os.time()-up_since).."s";
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69 end;
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70 };
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71 memory_lua = {
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72 get = function () return math.ceil(collectgarbage("count")*1024); end;
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73 tostring = human;
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74 };
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75 time = {
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76 tostring = function () return os.date("%T"); end;
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77 };
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78 cpu = {
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79 get = function ()
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80 local new_wall, new_clock = get_time(), os.clock();
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81 local pc = 0;
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82 if last_cpu_wall then
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83 pc = 100/((new_wall-last_cpu_wall)/(new_clock-last_cpu_clock));
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84 end
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85 last_cpu_wall, last_cpu_clock = new_wall, new_clock;
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86 return math.ceil(pc);
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87 end;
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88 tostring = "%s%%";
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89 };
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90 };
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91
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92 if has_pposix and pposix.meminfo then
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93 stats.memory_allocated = {
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94 get = function () return math.ceil(pposix.meminfo().allocated); end;
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95 tostring = human;
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96 }
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97 stats.memory_used = {
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98 get = function () return math.ceil(pposix.meminfo().used); end;
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99 tostring = human;
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100 }
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101 stats.memory_unused = {
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102 get = function () return math.ceil(pposix.meminfo().unused); end;
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103 tostring = human;
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104 }
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105 stats.memory_returnable = {
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106 get = function () return math.ceil(pposix.meminfo().returnable); end;
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107 tostring = human;
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108 }
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109 end
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110
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111 local add_statistics_filter; -- forward decl
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112 if prosody and prosody.arg then -- ensures we aren't in prosodyctl
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113 setmetatable(active_sessions, {
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114 __index = function ( t, k )
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115 local v = {
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116 bytes_in = 0, bytes_out = 0;
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117 stanzas_in = {
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118 message = 0, presence = 0, iq = 0;
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119 };
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120 stanzas_out = {
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121 message = 0, presence = 0, iq = 0;
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122 };
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123 }
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124 rawset(t, k, v);
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125 return v;
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126 end
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127 });
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128 local filters = require "util.filters";
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129 local function handle_stanza_in(stanza, session)
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130 local s = active_sessions[session].stanzas_in;
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131 local n = s[stanza.name];
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132 if n then
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133 s[stanza.name] = n + 1;
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134 end
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135 return stanza;
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136 end
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137 local function handle_stanza_out(stanza, session)
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138 local s = active_sessions[session].stanzas_out;
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139 local n = s[stanza.name];
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140 if n then
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141 s[stanza.name] = n + 1;
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142 end
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143 return stanza;
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144 end
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145 local function handle_bytes_in(bytes, session)
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146 local s = active_sessions[session];
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147 s.bytes_in = s.bytes_in + #bytes;
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148 return bytes;
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149 end
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150 local function handle_bytes_out(bytes, session)
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151 local s = active_sessions[session];
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152 s.bytes_out = s.bytes_out + #bytes;
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153 return bytes;
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154 end
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155 function add_statistics_filter(session)
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156 filters.add_filter(session, "stanzas/in", handle_stanza_in);
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157 filters.add_filter(session, "stanzas/out", handle_stanza_out);
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158 filters.add_filter(session, "bytes/in", handle_bytes_in);
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159 filters.add_filter(session, "bytes/out", handle_bytes_out);
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160 end
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161 end
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162
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163 return {
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164 stats = stats;
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165 active_sessions = active_sessions;
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166 filter_hook = add_statistics_filter;
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167 };