OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

Click here to display the system's profile data or here to proceed to next system.

Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rack0slot2.osadl.org (updated Wed Mar 18, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2389381	2	99	0,1	sleep7	0	-21	swapper/7	08:49:02	7
2175809	99	48	46,2	cyclictest	2673704	-21	kworker/u16:3+events_unbound	11:29:02	5
2175809	99	47	45,2	cyclictest	2457221	-21	kworker/u16:2+flush-8:0	12:18:52	5
2175809	99	47	45,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	12:26:08	5
2175809	99	47	45,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	12:26:08	5
2175809	99	47	44,2	cyclictest	2443177	-21	kworker/u16:0+events_unbound	10:08:37	5
2175809	99	46	44,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:25:17	5
2175809	99	46	44,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:25:17	5
2175809	99	44	42,2	cyclictest	2840512	-21	kworker/u16:3+events_unbound	12:29:02	5
2175809	99	44	42,2	cyclictest	2649986	-21	kworker/u16:1+events_unbound	11:12:08	5
2175809	99	44	42,2	cyclictest	2409475	-21	kworker/u16:4+events_unbound	09:11:09	5
2175809	99	43	40,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	11:26:16	5
2175809	99	42	40,2	cyclictest	2673704	-21	kworker/u16:3+events_unbound	11:16:57	5
2175809	99	42	40,2	cyclictest	2649986	-21	kworker/u16:1+events_unbound	10:56:37	5
2175809	99	42	40,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	12:11:17	5
2175809	99	42	40,2	cyclictest	2443177	-21	kworker/u16:0+events_unbound	10:15:41	5
2175809	99	42	40,2	cyclictest	2443177	-21	kworker/u16:0+events_unbound	09:56:49	5
2175809	99	42	40,2	cyclictest	2341765	-21	kworker/u16:3+flush-8:0	09:34:24	5
2175809	99	41	39,2	cyclictest	2840512	-21	kworker/u16:3+flush-8:0	12:14:03	5
2175809	99	41	39,2	cyclictest	2840512	-21	kworker/u16:3+events_unbound	12:08:17	5
2175809	99	41	39,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	11:21:17	5
2175809	99	41	39,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	11:01:09	5
2175809	99	41	39,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:03:10	5
2175809	99	41	38,2	cyclictest	2176019	-21	kworker/u16:2+flush-8:0	07:43:34	5
2175809	99	40	38,2	cyclictest	2649986	-21	kworker/u16:1+events_unbound	10:52:49	5
2175809	99	40	38,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	10:47:09	5
2175809	99	40	38,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	10:34:30	5
2175809	99	40	38,2	cyclictest	2443177	-21	kworker/u16:0+events_unbound	10:30:05	5
2175809	99	40	38,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	09:40:44	5
2175809	99	40	38,2	cyclictest	2284748	-21	kworker/u16:4+events_unbound	07:58:37	5
2175526	2	40	29,8	sleep6	0	-21	swapper/6	07:03:34	6
2175267	2	40	30,7	sleep4	0	-21	swapper/4	06:59:55	4
2175819	99	39	36,2	cyclictest	2853647	-21	dnf	12:08:21	7
2175809	99	39	37,2	cyclictest	2457221	-21	kworker/u16:2+flush-8:0	11:34:04	5
2175809	99	39	37,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	11:43:12	5
2175809	99	39	37,2	cyclictest	2443177	-21	kworker/u16:0+events_unbound	09:49:24	5
2175809	99	39	37,2	cyclictest	2443177	-21	kworker/u16:0+events_unbound	09:49:24	5
2175809	99	39	37,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:42:21	5
2175809	99	39	37,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:08:21	5
2175809	99	39	36,2	cyclictest	2649986	-21	kworker/u16:1+events_unbound	11:58:38	5
2175809	99	39	36,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	09:27:25	5
2175819	99	38	33,4	cyclictest	2841740	-21	latency_hist	12:03:34	7
2175809	99	38	36,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:21:58	5
2175809	99	38	36,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	10:21:58	5
2175809	99	38	36,2	cyclictest	2341765	-21	kworker/u16:3+events_unbound	09:32:24	5
2175809	99	38	36,2	cyclictest	2127761	-21	kworker/u16:1+events_unbound	07:28:59	5
2175805	99	38	36,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	10:23:57	4
2175805	99	38	36,2	cyclictest	2457221	-21	kworker/u16:2+events_unbound	10:23:57	4
2174309	2	38	3,30	sleep7	0	-21	swapper/7	06:59:01	7
2175809	99	37	35,2	cyclictest	2673704	-21	kworker/u16:3+events_unbound	11:48:17	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17