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annotate mod_log_events_by_cpu_usage/mod_log_events_by_cpu_usage.lua @ 4764:a754f7e380b2

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mod_dnsupdate: Rewrite port config vs DNS comparison code I'm not sure if it was correct, which means it was hard to understand and thus needed to be simplified. Hope this accomplishes that.
author Kim Alvefur <zash@zash.se>
date Mon, 08 Nov 2021 23:03:14 +0100
parents c0bc97c0ba61
children
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5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased
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1 module:set_global();
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2
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c0bc97c0ba61 mod_log_events_by_cpu_usage: Log events where more than a certain amount of CPU time was spent
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3 local treshold = module:get_option_number("log_cpu_threshold", 0.01);
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4
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5 function event_wrapper(handlers, event_name, event_data)
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6 local cpu_before = os.clock();
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7 local ret = handlers(event_name, event_data);
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8 local cpu_after = os.clock();
c0bc97c0ba61 mod_log_events_by_cpu_usage: Log events where more than a certain amount of CPU time was spent
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9 if (cpu_after - cpu_before) > treshold then
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10 module:log("warn", "%g seconds of CPU usage while processing event '%s'", (cpu_after - cpu_before), event_name);
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11 end
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12 return ret;
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13 end
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15 local http_events = require "net.http.server"._events;
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16 module:wrap_object_event(http_events, false, event_wrapper);
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17
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18 module:wrap_event(false, event_wrapper);
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19 function module.add_host(module)
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20 module:wrap_event(false, event_wrapper);
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21 end