minetest.git - modified minetest for gpcfs purposes

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--Minetest --Copyright (C) 2016 T4im -- --This program is free software; you can redistribute it and/or modify --it under the terms of the GNU Lesser General Public License as published by --the Free Software Foundation; either version 2.1 of the License, or --(at your option) any later version. -- --This program is distributed in the hope that it will be useful, --but WITHOUT ANY WARRANTY; without even the implied warranty of --MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --GNU Lesser General Public License for more details. -- --You should have received a copy of the GNU Lesser General Public License along --with this program; if not, write to the Free Software Foundation, Inc., --51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. local setmetatable = setmetatable local pairs, format = pairs, string.format local min, max, huge = math.min, math.max, math.huge local core = core local profiler = ... -- Split sampler and profile up, to possibly allow for rotation later. local sampler = {} local profile local stats_total local logged_time, logged_data local _stat_mt = { get_time_avg = function(self) return self.time_all/self.samples end, get_part_avg = function(self) if not self.part_all then return 100 -- Extra handling for "total" end return self.part_all/self.samples end, } _stat_mt.__index = _stat_mt function sampler.reset() -- Accumulated logged time since last sample. -- This helps determining, the relative time a mod used up. logged_time = 0 -- The measurements taken through instrumentation since last sample. logged_data = {} profile = { -- Current mod statistics (max/min over the entire mod lifespan) -- Mod specific instrumentation statistics are nested within. stats = {}, -- Current stats over all mods. stats_total = setmetatable({ samples = 0, time_min = huge, time_max = 0, time_all = 0, part_min = 100, part_max = 100 }, _stat_mt) } stats_total = profile.stats_total -- Provide access to the most recent profile. sampler.profile = profile end --- -- Log a measurement for the sampler to pick up later. -- Keep `log` and its often called functions lean. -- It will directly add to the instrumentation overhead. -- function sampler.log(modname, instrument_name, time_diff) if time_diff <= 0 then if time_diff < 0 then -- This **might** have happened on a semi-regular basis with huge mods, -- resulting in negative statistics (perhaps midnight time jumps or ntp corrections?). core.log("warning", format( "Time travel of %s::%s by %dµs.", modname, instrument_name, time_diff )) end -- Throwing these away is better, than having them mess with the overall result. return end local mod_data = logged_data[modname] if mod_data == nil then mod_data = {} logged_data[modname] = mod_data end mod_data[instrument_name] = (mod_data[instrument_name] or 0) + time_diff -- Update logged time since last sample. logged_time = logged_time + time_diff end --- -- Return a requested statistic. -- Initialize if necessary. -- local function get_statistic(stats_table, name) local statistic = stats_table[name] if statistic == nil then statistic = setmetatable({ samples = 0, time_min = huge, time_max = 0, time_all = 0, part_min = 100, part_max = 0, part_all = 0, }, _stat_mt) stats_table[name] = statistic end return statistic end --- -- Update a statistic table -- local function update_statistic(stats_table, time) stats_table.samples = stats_table.samples + 1 -- Update absolute time (µs) spend by the subject


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