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 Sun Jun 21, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2830700	2	94	0,1	sleep5	0	-21	swapper/5	08:30:00	5
2669281	2	55	19,31	sleep7	0	-21	swapper/7	07:07:59	7
2660133	2	54	43,7	sleep4	0	-21	swapper/4	07:04:51	4
2669279	2	44	34,7	sleep5	0	-21	swapper/5	07:07:57	5
2669691	99	39	37,1	cyclictest	0	-21	swapper/7	10:10:06	7
2669691	99	36	32,3	cyclictest	2678941	-21	vmstat	07:10:15	7
2669685	99	30	25,4	cyclictest	3105006	-21	latency_hist	10:29:43	5
2660946	2	30	10,16	sleep6	0	-21	swapper/6	07:05:01	6
2669691	99	29	28,0	cyclictest	0	-21	swapper/7	11:25:33	7
2669691	99	29	28,0	cyclictest	0	-21	swapper/7	09:19:22	7
2669691	99	27	26,0	cyclictest	0	-21	swapper/7	10:05:06	7
2669691	99	27	26,0	cyclictest	0	-21	swapper/7	07:25:02	7
3176325	2	25	0,1	chrt	0	-21	swapper/4	10:55:12	4
3176325	2	25	0,1	chrt	0	-21	swapper/4	10:55:12	4
2669685	99	25	23,2	cyclictest	3179464	-21	kworker/u16:1+events_unbound	11:14:50	5
2669685	99	25	23,2	cyclictest	3130078	-21	kworker/u16:5+events_unbound	10:54:54	5
2669685	99	25	23,2	cyclictest	3130078	-21	kworker/u16:5+events_unbound	10:54:54	5
2669682	99	25	24,1	cyclictest	3179464	-21	kworker/u16:1+events_unbound	11:10:02	4
2669682	99	25	20,4	cyclictest	3315376	-21	awk	11:54:43	4
2669691	99	24	22,1	cyclictest	3337537	-21	ssh	12:00:22	7
2669691	99	24	22,1	cyclictest	0	-21	swapper/7	09:54:53	7
2669685	99	24	22,2	cyclictest	2820575	-21	kworker/u16:2+events_unbound	09:33:18	5
2669682	99	24	23,1	cyclictest	3179464	-21	kworker/u16:1+events_unbound	11:18:25	4
2669691	99	23	22,0	cyclictest	0	-21	swapper/7	09:50:22	7
2669691	99	23	20,2	cyclictest	3215801	-21	ssh	11:13:53	7
2669685	99	23	21,2	cyclictest	3277159	-21	kworker/u16:1+events_unbound	11:54:38	5
2669685	99	23	21,2	cyclictest	2800031	-21	kworker/u16:0+events_unbound	08:20:42	5
2669685	99	23	21,2	cyclictest	2789262	-21	kworker/u16:3+events_unbound	08:17:46	5
2669691	99	22	21,0	cyclictest	0	-21	swapper/7	08:29:57	7
2669691	99	22	21,0	cyclictest	0	-21	swapper/7	07:55:08	7
2669685	99	22	20,2	cyclictest	3253778	-21	kworker/u16:2+flush-8:0	12:00:01	5
2669685	99	22	20,2	cyclictest	2867202	-21	kworker/u16:0+flush-8:0	09:00:58	5
2669685	99	22	20,2	cyclictest	2842910	-21	kworker/u16:1+events_unbound	08:51:42	5
2669685	99	22	20,2	cyclictest	2711574	-21	kworker/u16:1+events_unbound	07:38:57	5
2669691	99	21	20,0	cyclictest	0	-21	swapper/7	08:05:03	7
2669691	99	21	18,2	cyclictest	3154470	-21	ssh	10:49:43	7
2669691	99	21	17,3	cyclictest	3352837	-21	sh	12:09:53	7
2669691	99	21	0,19	cyclictest	6794	-21	sshd	09:10:30	7
2669685	99	21	19,2	cyclictest	3055866	-21	kworker/u16:1+events_unbound	10:14:54	5
2669685	99	21	19,2	cyclictest	2867202	-21	kworker/u16:0+events_unbound	09:06:43	5
2669685	99	21	19,2	cyclictest	2659875	-21	kworker/u16:3+events_unbound	07:12:06	5
2669691	99	20	19,0	cyclictest	0	-21	swapper/7	11:30:26	7
2669691	99	20	19,0	cyclictest	0	-21	swapper/7	08:29:43	7
2669691	99	20	19,0	cyclictest	0	-21	swapper/7	08:20:09	7
2669691	99	20	18,1	cyclictest	0	-21	swapper/7	10:40:53	7
2669691	99	20	0,19	cyclictest	3375262	-21	ssh	12:16:33	7
2669691	99	20	0,18	cyclictest	3165589	-21	ssh	10:52:33	7
2669685	99	20	18,2	cyclictest	3303224	-21	kworker/u16:0+events_unbound	11:55:11	5
2669685	99	20	18,2	cyclictest	3130078	-21	kworker/u16:5+events_unbound	10:49:51	5
2669685	99	20	18,2	cyclictest	3117722	-21	kworker/u16:4+flush-8:0	11:00:09	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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