mod_cron: Allow for a small amount of timer drift If the timer activates a bit early then a task might be just a few seconds short of being allowed to run. This would run such a task rather than wait another hour. The value 0.5% chosen so that a weekly task does not run an entire hour earlier than last time.

author: Kim Alvefur <zash@zash.se>
date: Sat, 15 Jan 2022 09:09:24 +0100
parent: 12009:f6fff0658108
child: 12489:8b42575738f0
--- a/plugins/mod_cron.lua	Fri Jan 14 17:00:13 2022 +0000
+++ b/plugins/mod_cron.lua	Sat Jan 15 09:09:24 2022 +0100
@@ -40,7 +40,7 @@
 	function host_module.unload() active_hosts[host_module.host] = nil; end
 end
 
-local function should_run(when, last) return not last or last + periods[when] <= os.time() end
+local function should_run(when, last) return not last or last + periods[when] * 0.995 <= os.time() end
 
 local function run_task(task)
 	local started_at = os.time();