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.
--- 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();
--- a/teal-src/plugins/mod_cron.tl Fri Jan 14 17:00:13 2022 +0000
+++ b/teal-src/plugins/mod_cron.tl Sat Jan 15 09:09:24 2022 +0100
@@ -78,7 +78,7 @@
end
local function should_run(when : frequency, last : integer) : boolean
- return not last or last + periods[when] <= os.time();
+ return not last or last + periods[when]*0.995 <= os.time();
end
local function run_task(task : task_spec)