Bug 322488

Summary:	Use a single timer to monitor directory changes
Product:	[Applications] konsole	Reporter:	Christoph Feck <cfeck>
Component:	general	Assignee:	Konsole Bugs <konsole-bugs-null>
Status:	RESOLVED FIXED
Severity:	wishlist	CC:	a.samirh78, cpigat242, khindenburg
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Christoph Feck 2013-07-17 14:13:42 UTC

Konsole currently uses a QTimer for each tab to monitor directory changes. It could use a single QTimer for all open tabs to reduce wake-ups.

To reproduce:
- open root Konsole
- run powertop for this single tab for a while
- open 10 additional tabs
- watch powertop on first tab for a while

Actual results:
- for a single tab, Konsole wakes up 0.5 times per second
- for 11 tabs, Konsole wakes up 5.5 times per second

Expected results:
- for 11 tabs, Konsole wakes up 0.5 times per second

Comment 1 Kurt Hindenburg 2013-08-03 21:46:33 UTC

Yes, the SessionController::snapshot is called every .5 seconds per tab

Comment 2 Ahmad Samir 2018-03-20 14:51:22 UTC

Is this still valid? (if so how to detect the wakes-up per second? :)).

Comment 3 Christoph Feck 2018-03-21 00:22:45 UTC

Comment #0 says I used "powertop" to measure wakeups.

Comment 4 Ahmad Samir 2018-03-24 18:52:12 UTC

I tested and I don't see a difference; I think it's probably due to the fact that I am using a PC, I don't have access to a laptop. Sorry for the noise.

Comment 5 Christoph Feck 2025-07-25 21:13:53 UTC

Testing a recent version, there are 0.15 wakeups per second, for 1 tab and for 11 tabs.