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 100 highest latencies:

System rack0slot2.osadl.org (updated Thu Jun 11, 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
3885728	2	92	0,1	sleep7	0	-21	swapper/7	11:01:30	7
3367602	99	55	53,2	cyclictest	3399521	-21	kworker/u16:2+flush-8:0	08:11:36	4
3367602	99	51	48,2	cyclictest	3399521	-21	kworker/u16:2+flush-8:0	07:21:36	4
3367093	2	47	37,7	sleep4	0	-21	swapper/4	07:02:48	4
3367602	99	43	40,2	cyclictest	3638403	-21	kworker/u16:2+events_unbound	09:36:13	4
3367150	2	43	33,7	sleep5	0	-21	swapper/5	07:03:37	5
3367602	99	40	38,2	cyclictest	3582918	-21	kworker/u16:3+events_unbound	10:21:12	4
3367067	2	39	3,31	sleep7	0	-21	swapper/7	07:02:27	7
3367607	99	37	34,2	cyclictest	3795707	-21	kworker/u16:1+events_unbound	12:16:24	6
3367602	99	37	34,2	cyclictest	3582918	-21	kworker/u16:3+flush-8:0	10:05:36	4
3367602	99	36	34,2	cyclictest	3592228	-21	kworker/u16:4+flush-8:0	09:56:56	4
3367602	99	35	33,2	cyclictest	3795707	-21	kworker/u16:1+events_unbound	10:53:52	4
3367602	99	35	33,2	cyclictest	3722883	-21	kworker/u16:0+events_unbound	10:10:21	4
3367602	99	35	33,2	cyclictest	3638403	-21	kworker/u16:2+flush-8:0	09:21:44	4
3367602	99	35	33,2	cyclictest	3399521	-21	kworker/u16:2+events_unbound	08:06:11	4
3367602	99	35	32,2	cyclictest	3592228	-21	kworker/u16:4+events_unbound	09:11:49	4
3367602	99	35	32,2	cyclictest	3592228	-21	kworker/u16:4+events_unbound	09:11:49	4
3367608	99	34	29,4	cyclictest	3795274	-21	latency_hist	10:26:10	7
3367602	99	34	32,2	cyclictest	3638403	-21	kworker/u16:2+events_unbound	10:39:32	4
3367602	99	32	30,2	cyclictest	3795707	-21	kworker/u16:1+events_unbound	12:00:52	4
3367602	99	32	30,2	cyclictest	3795707	-21	kworker/u16:1+events_unbound	11:44:43	4
3367602	99	32	30,2	cyclictest	3638403	-21	kworker/u16:2+events_unbound	10:20:56	4
3817142	2	31	0,1	chrt	3817140	-21	ssh	10:31:57	7
3367602	99	31	29,2	cyclictest	3988460	-21	kworker/u16:2+events_unbound	12:18:51	4
3367602	99	31	29,2	cyclictest	3988460	-21	kworker/u16:2+events_unbound	12:02:32	4
3367602	99	31	29,2	cyclictest	3582918	-21	kworker/u16:3+flush-8:0	09:47:08	4
3367602	99	31	29,2	cyclictest	3582918	-21	kworker/u16:3+flush-8:0	09:47:08	4
3367602	99	31	27,3	cyclictest	3843942	-21	kworker/u16:0+flush-8:0	10:56:25	4
3367265	2	31	21,7	sleep6	0	-21	swapper/6	07:05:14	6
3367606	99	30	28,2	cyclictest	3592228	-21	kworker/u16:4+events_unbound	10:16:36	5
3367602	99	30	28,2	cyclictest	3913479	-21	kworker/u16:0+events_unbound	11:39:40	4
3367602	99	30	28,2	cyclictest	3795707	-21	kworker/u16:1+flush-8:0	12:13:56	4
3367602	99	30	28,2	cyclictest	3795707	-21	kworker/u16:1+flush-8:0	10:47:55	4
3367602	99	30	28,2	cyclictest	3638403	-21	kworker/u16:2+events_unbound	10:31:00	4
3367602	99	30	28,2	cyclictest	3582918	-21	kworker/u16:3+flush-8:0	11:05:40	4
3367602	99	30	27,2	cyclictest	3638403	-21	kworker/u16:2+flush-8:0	10:41:11	4
3367602	99	30	27,2	cyclictest	3582918	-21	kworker/u16:3+flush-8:0	09:51:16	4
3367608	99	29	28,0	cyclictest	0	-21	swapper/7	09:06:25	7
3367602	99	29	27,2	cyclictest	3988460	-21	kworker/u16:2+flush-8:0	12:26:51	4
3367602	99	29	27,2	cyclictest	3913479	-21	kworker/u16:0+flush-8:0	11:20:00	4
3367602	99	29	27,2	cyclictest	3795707	-21	kworker/u16:1+flush-8:0	11:13:11	4
3367602	99	29	27,2	cyclictest	3795707	-21	kworker/u16:1+flush-8:0	10:35:07	4
3367602	99	29	27,2	cyclictest	3795707	-21	kworker/u16:1+events_unbound	11:33:32	4
3367602	99	29	27,2	cyclictest	3614159	-21	kworker/u16:1+events_unbound	09:20:04	4
3367602	99	29	27,2	cyclictest	3582918	-21	kworker/u16:3+events_unbound	11:53:32	4
3367602	99	29	27,2	cyclictest	3582918	-21	kworker/u16:3+events_unbound	11:53:32	4
3367602	99	29	27,2	cyclictest	3582918	-21	kworker/u16:3+events_unbound	09:27:41	4
3367602	99	29	26,2	cyclictest	3988460	-21	kworker/u16:2+events_unbound	12:06:20	4
3367608	99	28	27,0	cyclictest	0	-21	swapper/7	10:29:07	7
3367602	99	28	26,2	cyclictest	3928241	-21	kworker/u16:2+events_unbound	11:30:19	4
3367602	99	28	26,2	cyclictest	3928241	-21	kworker/u16:2+events_unbound	11:25:32	4
3367602	99	28	26,2	cyclictest	3879752	-21	kworker/u16:2+events_unbound	11:07:56	4
3367602	99	28	26,2	cyclictest	3879752	-21	kworker/u16:2+events_unbound	11:07:56	4
3367602	99	28	26,2	cyclictest	3592228	-21	kworker/u16:4+events_unbound	09:35:32	4
3367608	99	27	26,0	cyclictest	0	-21	swapper/7	07:46:33	7
3367608	99	27	24,2	cyclictest	3745777	-21	ssh	10:03:56	7
3367608	99	27	22,4	cyclictest	635	-21	systemd-journal	09:31:05	7
3367608	99	27	22,4	cyclictest	635	-21	systemd-journal	08:01:05	7
3367602	99	27	25,2	cyclictest	3602418	-21	kworker/u16:0+events_unbound	09:06:17	4
3367602	99	27	25,2	cyclictest	3582918	-21	kworker/u16:3+events_unbound	12:23:32	4
3367608	99	26	25,0	cyclictest	0	-21	swapper/7	10:36:30	7
3367608	99	26	25,0	cyclictest	0	-21	swapper/7	08:46:25	7
3367606	99	26	24,2	cyclictest	3377237	-21	kworker/u16:4+flush-8:0	07:36:33	5
3367602	99	26	25,1	cyclictest	3348584	-21	kworker/u16:1+events_unbound	07:16:00	4
3367602	99	26	24,2	cyclictest	3399521	-21	kworker/u16:2+events_unbound	09:06:05	4
3367602	99	25	23,2	cyclictest	3988460	-21	kworker/u16:2+flush-8:0	11:48:20	4
3367602	99	25	23,2	cyclictest	3988460	-21	kworker/u16:2+flush-8:0	11:48:20	4
3367602	99	25	23,2	cyclictest	3988460	-21	kworker/u16:2+events_unbound	12:31:43	4
3367602	99	25	23,2	cyclictest	3988460	-21	kworker/u16:2+events_unbound	12:31:43	4
3367602	99	25	23,2	cyclictest	3399521	-21	kworker/u16:2+flush-8:0	07:51:36	4
3367608	99	24	23,0	cyclictest	0	-21	swapper/7	12:32:32	7
3367608	99	24	23,0	cyclictest	0	-21	swapper/7	12:32:32	7
3367602	99	24	22,2	cyclictest	3722883	-21	kworker/u16:0+events_unbound	10:12:24	4
3367602	99	24	21,2	cyclictest	3468008	-21	kworker/u16:0+events_unbound	08:36:13	4
3367608	99	23	22,0	cyclictest	0	-21	swapper/7	08:06:31	7
3367608	99	23	21,1	cyclictest	3602178	-21	diskmemload	12:16:30	7
3367608	99	23	17,5	cyclictest	4096436	-21	latency_hist	12:31:09	7
3367606	99	23	19,3	cyclictest	3592228	-21	kworker/u16:4+events_unbound	09:56:27	5
3367602	99	23	21,2	cyclictest	3582918	-21	kworker/u16:3+events_unbound	09:42:19	4
3367602	99	23	21,2	cyclictest	3377237	-21	kworker/u16:4+flush-8:0	07:39:21	4
3367608	99	21	20,0	cyclictest	0	-21	swapper/7	10:16:25	7
3367602	99	21	19,2	cyclictest	3487232	-21	kworker/u16:1+flush-8:0	08:22:21	4
3367602	99	21	19,2	cyclictest	3487232	-21	kworker/u16:1+events_unbound	08:06:27	4
3367602	99	21	19,2	cyclictest	3377237	-21	kworker/u16:4+flush-8:0	07:46:26	4
3367608	99	20	19,0	cyclictest	0	-21	swapper/7	08:56:23	7
3367608	99	20	19,0	cyclictest	0	-21	swapper/7	08:21:30	7
3367608	99	20	19,0	cyclictest	0	-21	swapper/7	07:36:39	7
3367608	99	20	18,1	cyclictest	4045896	-21	ssh	12:06:44	7
3367608	99	20	18,1	cyclictest	4000046	-21	ssh	11:51:05	7
3367608	99	20	18,1	cyclictest	4000046	-21	ssh	11:51:05	7
3367608	99	20	17,2	cyclictest	3624197	-21	ssh	09:12:19	7
3367608	99	20	17,2	cyclictest	3624197	-21	ssh	09:12:19	7
3367608	99	20	0,18	cyclictest	3927816	-21	latency_hist	11:21:10	7
3367607	99	20	17,2	cyclictest	3582918	-21	kworker/u16:3+flush-8:0	10:06:40	6
3367606	99	20	18,2	cyclictest	3913479	-21	kworker/u16:0+events_unbound	11:36:36	5
3367602	99	20	18,2	cyclictest	3468008	-21	kworker/u16:0+events_unbound	08:19:21	4
3367608	99	19	18,0	cyclictest	0	-21	swapper/7	08:36:37	7
3367608	99	19	17,1	cyclictest	4035540	-21	ssh	12:04:56	7
3367608	99	19	17,1	cyclictest	3936991	-21	ssh	11:21:36	7
3367602	99	19	16,2	cyclictest	3348584	-21	kworker/u16:1+flush-8:0	07:06:25	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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