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 Wed Apr 08, 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
3913449	2	64	54,7	sleep6	0	-21	swapper/6	07:01:23	6
3913786	99	56	54,2	cyclictest	4022781	-21	kworker/u16:0+events_unbound	08:09:42	5
3913788	99	52	49,2	cyclictest	122214	-21	kworker/u16:3+flush-8:0	10:47:36	6
3913786	99	51	49,2	cyclictest	360799	-21	kworker/u16:2+events_unbound	12:17:40	5
3913786	99	51	49,2	cyclictest	14315	-21	kworker/u16:1+events_unbound	10:27:41	5
3913786	99	47	45,2	cyclictest	360799	-21	kworker/u16:2+events_unbound	12:22:43	5
3913786	99	47	45,2	cyclictest	263893	-21	kworker/u16:3+events_unbound	11:12:38	5
3913786	99	46	44,2	cyclictest	263893	-21	kworker/u16:3+events_unbound	11:22:42	5
3913786	99	46	44,2	cyclictest	217789	-21	kworker/u16:0+flush-8:0	10:52:39	5
3913438	2	46	36,7	sleep4	0	-21	swapper/4	07:01:13	4
3913792	99	44	38,5	cyclictest	158173	-21	latency_hist	10:27:10	7
3913786	99	44	42,2	cyclictest	348012	-21	kworker/u16:1+events_unbound	11:48:12	5
3913786	99	44	42,2	cyclictest	348012	-21	kworker/u16:1+events_unbound	11:48:12	5
3913786	99	44	42,2	cyclictest	122214	-21	kworker/u16:3+events_unbound	10:47:41	5
3913343	2	44	34,7	sleep5	0	-21	swapper/5	06:59:53	5
3913786	99	43	41,2	cyclictest	37633	-21	kworker/u16:2+events_unbound	10:44:57	5
3913786	99	43	41,2	cyclictest	360799	-21	kworker/u16:2+events_unbound	11:56:40	5
3913786	99	43	41,2	cyclictest	182569	-21	kworker/u16:4+events_unbound	10:41:12	5
3913792	99	42	0,40	cyclictest	242227	-21	latency_hist	11:02:11	7
3913786	99	42	40,2	cyclictest	433991	-21	kworker/u16:0+events_unbound	12:30:05	5
3913786	99	41	39,2	cyclictest	325489	-21	kworker/u16:0+events_unbound	11:42:40	5
3913786	99	41	39,2	cyclictest	182569	-21	kworker/u16:4+events_unbound	12:14:05	5
3913786	99	40	38,2	cyclictest	360799	-21	kworker/u16:2+flush-8:0	12:07:36	5
3913781	99	40	38,2	cyclictest	3894835	-21	kworker/u16:3+events_unbound	07:02:25	4
3913213	2	40	4,31	sleep7	0	-21	swapper/7	06:58:03	7
3913786	99	38	36,2	cyclictest	4168910	-21	kworker/u16:4+events_unbound	09:31:08	5
3913786	99	38	36,2	cyclictest	360799	-21	kworker/u16:2+events_unbound	12:03:44	5
3913786	99	38	36,2	cyclictest	263892	-21	kworker/u16:2+events_unbound	11:21:33	5
3913792	99	37	31,5	cyclictest	4099325	-21	latency_hist	08:37:11	7
3913786	99	37	35,2	cyclictest	59581	-21	kworker/u16:4+events_unbound	10:03:48	5
3913786	99	37	35,2	cyclictest	59581	-21	kworker/u16:4+events_unbound	09:50:00	5
3913786	99	37	35,2	cyclictest	59581	-21	kworker/u16:4+events_unbound	09:50:00	5
3913786	99	37	35,2	cyclictest	2443238	-21	kworker/u16:2+events_unbound	07:22:35	5
3913786	99	37	35,2	cyclictest	217789	-21	kworker/u16:0+events_unbound	11:05:41	5
3913786	99	36	34,2	cyclictest	182569	-21	kworker/u16:4+flush-8:0	11:37:45	5
3913792	99	35	34,0	cyclictest	0	-21	swapper/7	07:57:24	7
3913786	99	35	33,2	cyclictest	37633	-21	kworker/u16:2+events_unbound	10:26:42	5
3913786	99	35	33,2	cyclictest	182569	-21	kworker/u16:4+events_unbound	11:28:26	5
3913792	99	34	33,0	cyclictest	0	-21	swapper/7	07:37:24	7
3913786	99	34	32,2	cyclictest	4109280	-21	kworker/u16:2+events_unbound	09:21:26	5
3913786	99	34	32,2	cyclictest	3994343	-21	kworker/u16:1+events_unbound	08:50:12	5
3913786	99	34	32,2	cyclictest	263893	-21	kworker/u16:3+events_unbound	11:10:23	5
3913786	99	34	32,2	cyclictest	263893	-21	kworker/u16:3+events_unbound	11:10:23	5
3913786	99	34	32,2	cyclictest	14315	-21	kworker/u16:1+events_unbound	10:20:19	5
3913786	99	34	32,2	cyclictest	119854	-21	kworker/u16:0+events_unbound	10:16:52	5
3913792	99	33	32,0	cyclictest	0	-21	swapper/7	10:17:25	7
3913786	99	33	31,2	cyclictest	59581	-21	kworker/u16:4+events_unbound	09:45:20	5
3913786	99	33	31,2	cyclictest	4109280	-21	kworker/u16:2+events_unbound	09:23:05	5
3913786	99	33	31,2	cyclictest	263893	-21	kworker/u16:3+events_unbound	11:32:34	5
3913786	99	33	31,2	cyclictest	119854	-21	kworker/u16:0+events_unbound	10:33:46	5
3913781	99	33	31,2	cyclictest	4128227	-21	kworker/u16:3+events_unbound	08:52:26	4
3913792	99	32	31,0	cyclictest	0	-21	swapper/7	09:47:29	7
3913792	99	32	31,0	cyclictest	0	-21	swapper/7	09:47:29	7
3913792	99	32	26,5	cyclictest	650	-21	systemd-journal	12:22:11	7
3913786	99	32	30,2	cyclictest	4128227	-21	kworker/u16:3+events_unbound	09:13:43	5
3913786	99	32	30,2	cyclictest	4128227	-21	kworker/u16:3+events_unbound	09:10:55	5
3913786	99	32	30,2	cyclictest	4128227	-21	kworker/u16:3+events_unbound	09:10:55	5
3913786	99	32	30,2	cyclictest	3994343	-21	kworker/u16:1+events_unbound	09:06:48	5
3913786	99	32	30,2	cyclictest	360799	-21	kworker/u16:2+events_unbound	11:57:17	5
3913792	99	31	30,0	cyclictest	0	-21	swapper/7	09:22:26	7
3913786	99	31	29,2	cyclictest	4022781	-21	kworker/u16:0+events_unbound	08:28:22	5
3913786	99	31	29,2	cyclictest	3994343	-21	kworker/u16:1+flush-8:0	08:22:33	5
3913786	99	31	29,2	cyclictest	37633	-21	kworker/u16:2+flush-8:0	09:41:26	5
3913786	99	31	29,2	cyclictest	37633	-21	kworker/u16:2+events_unbound	10:00:27	5
3913786	99	31	29,2	cyclictest	182569	-21	kworker/u16:4+events_unbound	10:58:39	5
3913786	99	31	29,2	cyclictest	14315	-21	kworker/u16:1+events_unbound	09:53:39	5
3913786	99	31	29,2	cyclictest	14315	-21	kworker/u16:1+events_unbound	09:36:27	5
3913781	99	31	29,2	cyclictest	4182384	-21	kworker/u16:0+events_unbound	09:37:25	4
3913786	99	30	28,2	cyclictest	3936974	-21	kworker/u16:4+events_unbound	07:51:22	5
3913786	99	30	28,2	cyclictest	3936974	-21	kworker/u16:4+events_unbound	07:38:56	5
3913786	99	30	28,2	cyclictest	37633	-21	kworker/u16:2+events_unbound	10:10:35	5
3913786	99	29	27,2	cyclictest	3884084	-21	kworker/u16:1+events_unbound	07:07:02	5
3913786	99	29	27,2	cyclictest	2443238	-21	kworker/u16:2+events_unbound	08:01:22	5
3913781	99	29	27,2	cyclictest	37633	-21	kworker/u16:2+events_unbound	09:57:25	4
3913786	99	28	26,2	cyclictest	3936974	-21	kworker/u16:4+events_unbound	07:31:22	5
3913781	99	28	26,2	cyclictest	2443238	-21	kworker/u16:2+events_unbound	07:47:24	4
3913781	99	28	26,2	cyclictest	2443238	-21	kworker/u16:2+events_unbound	07:17:24	4
3913792	99	27	26,0	cyclictest	0	-21	swapper/7	08:47:37	7
3913786	99	27	25,2	cyclictest	4040891	-21	kworker/u16:3+events_unbound	08:21:22	5
3913781	99	27	25,2	cyclictest	360799	-21	kworker/u16:2+events_unbound	12:22:06	4
3913781	99	27	25,2	cyclictest	14315	-21	kworker/u16:1+events_unbound	10:12:28	4
3913792	99	26	25,0	cyclictest	0	-21	swapper/7	09:02:26	7
3913792	99	26	24,1	cyclictest	4147227	-21	diskmemload	09:42:38	7
3913786	99	26	24,2	cyclictest	4109280	-21	kworker/u16:2+events_unbound	08:45:56	5
3913786	99	26	23,2	cyclictest	4080230	-21	kworker/u16:4+flush-8:0	08:37:11	5
3913781	99	26	24,2	cyclictest	4168910	-21	kworker/u16:4+events_unbound	09:27:35	4
3913781	99	26	24,2	cyclictest	4040891	-21	kworker/u16:3+events_unbound	08:07:24	4
3913781	99	26	24,2	cyclictest	3894835	-21	kworker/u16:3+events_unbound	07:22:25	4
3913786	99	25	23,2	cyclictest	4128227	-21	kworker/u16:3+events_unbound	08:58:24	5
3913786	99	25	23,2	cyclictest	4109280	-21	kworker/u16:2+events_unbound	08:56:09	5
3913786	99	25	23,2	cyclictest	4022781	-21	kworker/u16:0+events_unbound	08:03:25	5
3913786	99	25	23,2	cyclictest	3894835	-21	kworker/u16:3+events_unbound	07:09:21	5
3913792	99	24	18,5	cyclictest	4022846	-21	latency_hist	07:57:11	7
3913786	99	24	22,2	cyclictest	4040891	-21	kworker/u16:3+events_unbound	08:15:17	5
3913786	99	24	22,2	cyclictest	3894835	-21	kworker/u16:3+events_unbound	07:35:42	5
3913786	99	24	22,2	cyclictest	3894835	-21	kworker/u16:3+events_unbound	07:19:52	5
3913781	99	24	22,2	cyclictest	4109280	-21	kworker/u16:2+flush-8:0	09:22:06	4
3913792	99	23	23,0	cyclictest	0	-21	swapper/7	11:32:06	7
3913786	99	23	21,2	cyclictest	4022781	-21	kworker/u16:0+events_unbound	08:37:57	5
3913786	99	23	21,2	cyclictest	2443238	-21	kworker/u16:2+flush-8:0	07:47:11	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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