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 Sun Aug 09, 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
527226	2	101	0,1	sleep7	527228	-21	tr	12:03:41	7
294055	2	93	0,1	sleep4	0	-21	swapper/4	10:28:41	4
4046972	2	55	21,29	sleep7	0	-21	swapper/7	07:07:56	7
4047283	99	54	52,2	cyclictest	4148509	-21	kworker/u16:2+flush-8:0	07:58:43	6
4046969	2	50	39,7	sleep4	0	-21	swapper/4	07:07:53	4
4047287	99	49	0,47	cyclictest	359950	-21	latency_hist	10:58:16	7
4047278	99	49	46,2	cyclictest	295287	-21	kworker/u16:4+flush-8:0	10:38:39	5
4047278	99	48	46,2	cyclictest	81925	-21	kworker/u16:1+events_unbound	09:13:44	5
4046952	2	48	38,7	sleep5	0	-21	swapper/5	07:07:38	5
6324	89	44	0,37	rtkit-daemon	0	-21	swapper/6	07:05:58	6
4047283	99	43	41,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:13:39	6
4047278	99	43	40,2	cyclictest	215716	-21	kworker/u16:0+flush-8:0	10:13:32	5
4047278	99	42	40,2	cyclictest	4080323	-21	kworker/u16:4+events_unbound	09:08:50	5
4047278	99	42	40,2	cyclictest	295287	-21	kworker/u16:4+events_unbound	10:48:44	5
4047278	99	42	40,2	cyclictest	152877	-21	kworker/u16:3+events_unbound	10:23:49	5
4047287	99	40	35,4	cyclictest	384315	-21	latency_hist	11:08:16	7
4047283	99	40	38,2	cyclictest	152877	-21	kworker/u16:3+events_unbound	09:38:52	6
4047278	99	39	37,2	cyclictest	542849	-21	kworker/u16:1+events_unbound	12:28:48	5
4047278	99	39	36,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	10:33:30	5
4047283	99	38	36,2	cyclictest	382041	-21	kworker/u16:3+events_unbound	11:38:50	6
4047283	99	38	36,2	cyclictest	152877	-21	kworker/u16:3+events_unbound	09:57:48	6
4047278	99	38	36,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:15:15	5
4047283	99	37	34,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:33:31	6
4047278	99	37	35,2	cyclictest	470075	-21	kworker/u16:0+events_unbound	12:06:47	5
4047278	99	37	35,2	cyclictest	369734	-21	kworker/u16:2+events_unbound	11:23:53	5
4047278	99	37	35,2	cyclictest	215716	-21	kworker/u16:0+flush-8:0	10:53:37	5
4047283	99	36	33,2	cyclictest	81925	-21	kworker/u16:1+events_unbound	09:28:19	6
4047278	99	36	34,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:23:14	5
4047278	99	36	34,2	cyclictest	470075	-21	kworker/u16:0+events_unbound	11:53:41	5
4047278	99	36	34,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	10:04:11	5
4047278	99	36	34,2	cyclictest	140674	-21	kworker/u16:2+events_unbound	09:57:20	5
4047278	99	36	33,2	cyclictest	4080323	-21	kworker/u16:4+events_unbound	07:48:19	5
4047278	99	35	33,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:34:30	5
4047278	99	35	33,2	cyclictest	470075	-21	kworker/u16:0+flush-8:0	11:52:14	5
4047278	99	35	33,2	cyclictest	445075	-21	kworker/u16:1+events_unbound	11:35:40	5
4047278	99	35	33,2	cyclictest	4080323	-21	kworker/u16:4+events_unbound	09:41:19	5
4047278	99	35	33,2	cyclictest	140674	-21	kworker/u16:2+events_unbound	09:51:19	5
4047278	99	35	32,2	cyclictest	41758	-21	kworker/u16:3+events_unbound	08:58:33	5
4047278	99	35	32,2	cyclictest	140674	-21	kworker/u16:2+events_unbound	09:43:18	5
4047283	99	34	32,2	cyclictest	140674	-21	kworker/u16:2+flush-8:0	09:46:07	6
4047278	99	34	32,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:27:30	5
4047278	99	34	32,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:27:30	5
4047278	99	34	32,2	cyclictest	4129255	-21	kworker/u16:1+events_unbound	07:58:51	5
4047278	99	34	32,2	cyclictest	369734	-21	kworker/u16:2+events_unbound	11:33:06	5
4047278	99	34	32,2	cyclictest	215716	-21	kworker/u16:0+flush-8:0	11:04:14	5
4047278	99	34	32,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	11:14:50	5
4047283	99	33	30,2	cyclictest	382041	-21	kworker/u16:3+flush-8:0	11:28:34	6
4047278	99	33	31,2	cyclictest	470075	-21	kworker/u16:0+events_unbound	12:09:35	5
4047278	99	33	31,2	cyclictest	382041	-21	kworker/u16:3+events_unbound	11:10:08	5
4047278	99	33	31,2	cyclictest	295287	-21	kworker/u16:4+events_unbound	10:47:59	5
4047278	99	33	31,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	10:00:55	5
4047278	99	33	30,2	cyclictest	382041	-21	kworker/u16:3+events_unbound	11:43:41	5
4047278	99	33	30,2	cyclictest	382041	-21	kworker/u16:3+events_unbound	11:43:41	5
201264	2	33	0,1	chrt	0	-21	swapper/6	09:53:16	6
4047287	99	32	27,4	cyclictest	250020	-21	latency_hist	10:13:17	7
4047283	99	32	30,2	cyclictest	152877	-21	kworker/u16:3+events_unbound	10:25:52	6
4047278	99	32	30,2	cyclictest	52131	-21	kworker/u16:0+events_unbound	09:33:04	5
4047278	99	32	30,2	cyclictest	295287	-21	kworker/u16:4+events_unbound	10:31:07	5
4047278	99	32	30,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	11:22:31	5
4047278	99	32	30,2	cyclictest	140674	-21	kworker/u16:2+events_unbound	09:35:31	5
4047283	99	31	29,2	cyclictest	4080323	-21	kworker/u16:4+events_unbound	09:23:44	6
4047278	99	31	29,2	cyclictest	152877	-21	kworker/u16:3+flush-8:0	10:12:55	5
4047283	99	30	28,2	cyclictest	4080323	-21	kworker/u16:4+events_unbound	09:03:46	6
4047283	99	30	27,2	cyclictest	445075	-21	kworker/u16:1+events_unbound	12:03:18	6
4047278	99	30	28,2	cyclictest	52131	-21	kworker/u16:0+events_unbound	09:22:31	5
4047278	99	30	28,2	cyclictest	382041	-21	kworker/u16:3+events_unbound	11:41:44	5
4047287	99	29	23,5	cyclictest	125	-21	kswapd0	12:26:50	7
4047287	99	29	23,5	cyclictest	125	-21	kswapd0	12:26:50	7
4047283	99	29	27,2	cyclictest	482321	-21	kworker/u16:4+flush-8:0	12:29:14	6
4047278	99	29	27,2	cyclictest	482321	-21	kworker/u16:4+events_unbound	12:00:14	5
4047275	99	29	26,2	cyclictest	369734	-21	kworker/u16:2+flush-8:0	11:13:34	4
4047278	99	28	26,2	cyclictest	81925	-21	kworker/u16:1+flush-8:0	09:03:35	5
4047278	99	28	26,2	cyclictest	81925	-21	kworker/u16:1+events_unbound	09:27:24	5
4047278	99	28	26,2	cyclictest	4177985	-21	kworker/u16:2+flush-8:0	08:28:18	5
4047275	99	28	25,2	cyclictest	3992253	-21	kworker/u16:0+flush-8:0	07:18:33	4
4047275	99	28	24,3	cyclictest	286765	-21	kworker/u16:1+flush-8:0	10:48:23	4
4047283	99	27	25,2	cyclictest	542849	-21	kworker/u16:1+events_unbound	12:23:45	6
4047283	99	27	25,2	cyclictest	542849	-21	kworker/u16:1+events_unbound	12:23:45	6
4047283	99	27	25,2	cyclictest	286765	-21	kworker/u16:1+flush-8:0	10:33:47	6
4047283	99	27	25,2	cyclictest	286765	-21	kworker/u16:1+events_unbound	10:50:00	6
4047278	99	27	25,2	cyclictest	4026758	-21	kworker/u16:1+events_unbound	07:09:32	5
4047278	99	27	25,2	cyclictest	3992253	-21	kworker/u16:0+events_unbound	07:13:19	5
4047278	99	26	24,2	cyclictest	215716	-21	kworker/u16:0+flush-8:0	10:22:08	5
4047278	99	26	24,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	11:02:11	5
4047283	99	25	23,2	cyclictest	52131	-21	kworker/u16:0+events_unbound	09:13:30	6
4047283	99	25	23,2	cyclictest	382041	-21	kworker/u16:3+flush-8:0	11:04:20	6
4047283	99	25	23,2	cyclictest	369734	-21	kworker/u16:2+events_unbound	11:28:15	6
4047283	99	25	23,2	cyclictest	369734	-21	kworker/u16:2+events_unbound	11:18:40	6
4047275	99	25	22,2	cyclictest	470075	-21	kworker/u16:0+flush-8:0	12:08:38	4
182569	2	25	0,0	chrt	182570	-21	kthreadcore	09:43:40	7
4047283	99	24	22,2	cyclictest	41758	-21	kworker/u16:3+flush-8:0	08:48:17	6
4047283	99	24	22,2	cyclictest	215716	-21	kworker/u16:0+flush-8:0	09:58:54	6
4047283	99	24	22,2	cyclictest	215716	-21	kworker/u16:0+events_unbound	11:17:55	6
4047278	99	24	22,2	cyclictest	4080323	-21	kworker/u16:4+flush-8:0	08:11:35	5
4047278	99	24	22,2	cyclictest	3992254	-21	kworker/u16:2+events_unbound	07:43:03	5
4047275	99	24	22,2	cyclictest	152877	-21	kworker/u16:3+flush-8:0	10:23:59	4
4047275	99	24	21,3	cyclictest	152877	-21	kworker/u16:3+flush-8:0	09:57:52	4
216733	2	24	0,1	chrt	216734	-21	kthreadcore	09:58:38	7
4047283	99	23	21,2	cyclictest	152877	-21	kworker/u16:3+events_unbound	10:07:42	6
4047278	99	23	21,2	cyclictest	3992254	-21	kworker/u16:2+flush-8:0	07:48:12	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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