Software / code / prosody-modules
Changeset
3616:c0bc97c0ba61
mod_log_events_by_cpu_usage: Log events where more than a certain amount of CPU time was spent
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Mon, 10 Jun 2019 15:23:52 +0200 |
| parents | 3615:5fe34e5f9829 |
| children | 3617:61b9c89db212 |
| files | mod_log_events_by_cpu_usage/README.markdown mod_log_events_by_cpu_usage/mod_log_events_by_cpu_usage.lua |
| diffstat | 2 files changed, 31 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_log_events_by_cpu_usage/README.markdown Mon Jun 10 15:23:52 2019 +0200 @@ -0,0 +1,10 @@ +This module logs events where more than a certain amount of CPU time was +spent. + +``` lua +log_cpu_threshold = 0.01 -- in seconds, so this is 10 milliseconds +``` + +Uses the Lua +[`os.clock()`](http://www.lua.org/manual/5.2/manual.html#pdf-os.clock) +function to estimate CPU usage.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_log_events_by_cpu_usage/mod_log_events_by_cpu_usage.lua Mon Jun 10 15:23:52 2019 +0200 @@ -0,0 +1,21 @@ +module:set_global(); + +local treshold = module:get_option_number("log_cpu_threshold", 0.01); + +function event_wrapper(handlers, event_name, event_data) + local cpu_before = os.clock(); + local ret = handlers(event_name, event_data); + local cpu_after = os.clock(); + if (cpu_after - cpu_before) > treshold then + module:log("warn", "%g seconds of CPU usage while processing event '%s'", (cpu_after - cpu_before), event_name); + end + return ret; +end + +local http_events = require "net.http.server"._events; +module:wrap_object_event(http_events, false, event_wrapper); + +module:wrap_event(false, event_wrapper); +function module.add_host(module) + module:wrap_event(false, event_wrapper); +end
