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 Sat Sep 12, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2916597	2	95	0,1	sleep5	0	-21	swapper/5	11:30:07	5
3002002	2	94	0,1	sleep4	0	-21	swapper/4	12:04:44	4
2331925	2	47	37,7	sleep5	0	-21	swapper/5	07:08:04	5
2332353	99	46	41,4	cyclictest	2680812	-21	latency_hist	09:54:52	7
2332343	99	46	44,2	cyclictest	2618296	-21	kworker/u16:3+flush-8:0	09:30:11	4
2332343	99	41	39,2	cyclictest	2841492	-21	kworker/u16:5+events_unbound	11:50:23	4
2332343	99	41	39,2	cyclictest	2594159	-21	kworker/u16:1+events_unbound	09:44:55	4
2332343	99	41	38,2	cyclictest	2719192	-21	kworker/u16:2+events_unbound	10:44:55	4
2332343	99	40	38,2	cyclictest	2754983	-21	kworker/u16:3+events_unbound	11:26:52	4
2332343	99	40	38,2	cyclictest	2754983	-21	kworker/u16:3+events_unbound	11:26:52	4
2332343	99	40	37,2	cyclictest	2594159	-21	kworker/u16:1+events_unbound	10:41:55	4
2332022	2	40	30,7	sleep4	0	-21	swapper/4	07:09:23	4
2322772	2	40	4,31	sleep7	0	-21	swapper/7	07:05:01	7
2332353	99	39	33,5	cyclictest	2481913	-21	latency_hist	08:24:52	7
2332343	99	39	37,2	cyclictest	2754983	-21	kworker/u16:3+events_unbound	11:02:07	4
2332343	99	39	36,2	cyclictest	3051380	-21	kworker/u16:3+events_unbound	12:30:07	4
2332343	99	39	36,2	cyclictest	2462170	-21	kworker/u16:2+events_unbound	09:53:00	4
2332343	99	38	36,2	cyclictest	2841492	-21	kworker/u16:5+events_unbound	11:47:55	4
2332343	99	38	36,2	cyclictest	2841492	-21	kworker/u16:5+events_unbound	11:13:56	4
2332343	99	38	36,2	cyclictest	2754983	-21	kworker/u16:3+events_unbound	10:53:11	4
2332343	99	38	36,2	cyclictest	2719192	-21	kworker/u16:2+events_unbound	10:34:51	4
2332343	99	38	36,2	cyclictest	2462170	-21	kworker/u16:2+events_unbound	09:39:15	4
2332343	99	37	35,2	cyclictest	2472460	-21	kworker/u16:3+events_unbound	09:14:36	4
2332343	99	36	34,2	cyclictest	2841492	-21	kworker/u16:5+events_unbound	11:17:47	4
2332343	99	36	34,2	cyclictest	2689731	-21	kworker/u16:3+events_unbound	09:56:31	4
2332343	99	36	34,2	cyclictest	2462170	-21	kworker/u16:2+events_unbound	09:43:39	4
2332343	99	36	34,2	cyclictest	2312779	-21	kworker/u16:1+flush-8:0	08:10:23	4
2332343	99	35	33,2	cyclictest	3073679	-21	kworker/u16:2+events_unbound	12:37:19	4
2332343	99	35	33,2	cyclictest	2977409	-21	kworker/u16:3+events_unbound	12:06:32	4
2332343	99	35	33,2	cyclictest	2977409	-21	kworker/u16:3+events_unbound	12:06:32	4
2332343	99	35	33,2	cyclictest	2870788	-21	kworker/u16:0+events_unbound	11:36:40	4
2332343	99	35	33,2	cyclictest	2816004	-21	kworker/u16:0+events_unbound	10:56:35	4
2332343	99	35	33,2	cyclictest	2719192	-21	kworker/u16:2+events_unbound	10:39:11	4
2332343	99	35	33,2	cyclictest	2618296	-21	kworker/u16:3+events_unbound	09:29:35	4
2332343	99	35	33,2	cyclictest	2594159	-21	kworker/u16:1+events_unbound	10:29:15	4
2332343	99	35	33,2	cyclictest	2462170	-21	kworker/u16:2+flush-8:0	09:20:07	4
2332343	99	35	33,2	cyclictest	2462170	-21	kworker/u16:2+flush-8:0	09:20:07	4
2332343	99	35	33,2	cyclictest	2283551	-21	kworker/u16:0+events_unbound	07:14:56	4
2332343	99	34	32,2	cyclictest	3014471	-21	kworker/u16:1+events_unbound	12:21:43	4
2332343	99	34	32,2	cyclictest	2916661	-21	kworker/u16:4+events_unbound	11:43:39	4
2332343	99	34	32,2	cyclictest	2870788	-21	kworker/u16:0+events_unbound	12:28:00	4
2332343	99	34	32,2	cyclictest	2641215	-21	kworker/u16:0+events_unbound	10:04:00	4
2332343	99	34	32,2	cyclictest	2641215	-21	kworker/u16:0+events_unbound	10:04:00	4
2332343	99	34	32,2	cyclictest	2594159	-21	kworker/u16:1+events_unbound	10:09:11	4
2332343	99	34	32,2	cyclictest	2594159	-21	kworker/u16:1+events_unbound	10:09:11	4
2765618	2	33	0,1	chrt	2765617	-21	ssh	10:26:54	7
2332343	99	33	31,2	cyclictest	3014471	-21	kworker/u16:1+flush-8:0	12:15:26	4
2332343	99	33	31,2	cyclictest	2870788	-21	kworker/u16:0+events_unbound	11:58:00	4
2332343	99	33	31,2	cyclictest	2870788	-21	kworker/u16:0+events_unbound	11:20:51	4
2332343	99	33	31,2	cyclictest	2641215	-21	kworker/u16:0+events_unbound	10:16:11	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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