Mercurial > prosody-modules
annotate mod_statistics_mem/mod_statistics_mem.lua @ 4838:fd2e48d4ac94
mod_bookmarks2: Advertise XEP-0049 support
In the case mod_private isn’t loaded, some clients (like poezio) won’t even
attempt to use Private XML Storage unless this feature is advertised. This is
on the domain JID and not on the account JID!
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Sun, 26 Dec 2021 14:51:35 +0100 |
parents | 403d5cd924eb |
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mod_statistics_mem: Module that collects memory usage stats from /proc
Kim Alvefur <zash@zash.se>
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1 -- Probably Linux-specific memory statistics |
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2 |
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3 module:set_global(); |
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4 |
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mod_statistics_mem: Module that collects memory usage stats from /proc
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5 local human; |
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6 do |
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7 local tostring = tostring; |
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8 local s_format = string.format; |
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9 local m_floor = math.floor; |
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10 local m_max = math.max; |
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11 local prefixes = "kMGTPEZY"; |
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12 local multiplier = 1024; |
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13 |
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14 function human(num) |
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15 num = tonumber(num) or 0; |
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16 local m = 0; |
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17 while num >= multiplier and m < #prefixes do |
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18 num = num / multiplier; |
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19 m = m + 1; |
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20 end |
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21 |
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22 return s_format("%0."..m_max(0,3-#tostring(m_floor(num))).."f%sB", |
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23 num, m > 0 and (prefixes:sub(m,m) .. "i") or ""); |
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24 end |
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25 end |
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26 |
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27 |
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28 local pagesize = 4096; -- according to getpagesize() |
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29 module:provides("statistics", { |
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30 statistics = { |
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31 memory_total = { -- virtual memory |
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32 get = function () |
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33 local statm, err = io.open"/proc/self/statm"; |
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34 if statm then |
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35 local total = statm:read"*n"; |
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36 statm:close(); |
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37 return total * pagesize; |
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38 else |
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39 module:log("debug", err); |
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40 end |
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41 end; |
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42 tostring = human; |
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43 }; |
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44 memory_rss = { -- actual in-memory data size |
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45 get = function () |
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46 local statm, err = io.open"/proc/self/statm"; |
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47 if statm then |
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48 statm:read"*n"; -- Total size, ignore |
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49 local rss = statm:read"*n"; |
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50 statm:close(); |
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51 return rss * pagesize; |
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52 else |
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53 module:log("debug", err); |
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54 end |
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55 end; |
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56 tostring = human; |
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57 }; |
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58 } |
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59 }); |