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 Tue Sep 01, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2059521	2	103	0,1	sleep7	2059522	-21	kthreadcore	23:44:55	7
1441041	2	68	57,7	sleep4	0	-21	swapper/4	19:05:51	4
1441314	2	57	46,8	sleep5	0	-21	swapper/5	19:09:37	5
1432041	2	53	19,29	sleep7	0	-21	swapper/7	19:04:41	7
1441639	99	52	47,4	cyclictest	1861797	-21	latency_hist	22:24:38	7
1441635	99	43	41,2	cyclictest	1862183	-21	kworker/u16:1+flush-8:0	22:34:38	6
1441635	99	43	41,2	cyclictest	1862183	-21	kworker/u16:1+flush-8:0	22:34:38	6
1441635	99	40	38,2	cyclictest	1862183	-21	kworker/u16:1+flush-8:0	22:59:39	6
1441627	99	38	35,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:14:54	4
1441627	99	37	35,2	cyclictest	2033114	-21	kworker/u16:5+events_unbound	23:35:36	4
1441627	99	37	35,2	cyclictest	1862183	-21	kworker/u16:1+events_unbound	23:07:00	4
1441627	99	37	35,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:54:20	4
1441627	99	37	35,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:54:20	4
1441627	99	36	34,2	cyclictest	1862183	-21	kworker/u16:1+events_unbound	22:56:00	4
1441627	99	36	34,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	21:27:57	4
1441627	99	35	33,2	cyclictest	2033114	-21	kworker/u16:5+events_unbound	00:25:03	4
1441627	99	35	33,2	cyclictest	1862183	-21	kworker/u16:1+events_unbound	22:31:24	4
1441627	99	35	33,2	cyclictest	1862183	-21	kworker/u16:1+events_unbound	22:31:24	4
1441627	99	35	33,2	cyclictest	1739741	-21	kworker/u16:2+events_unbound	22:25:40	4
1441627	99	35	33,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:42:13	4
1441627	99	35	33,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:11:40	4
1441627	99	34	32,2	cyclictest	2008569	-21	kworker/u16:4+events_unbound	00:22:11	4
1441627	99	34	32,2	cyclictest	1947487	-21	kworker/u16:0+events_unbound	23:22:13	4
1944234	2	33	0,1	chrt	1944236	-21	missed_timers	22:55:03	7
1441627	99	33	31,2	cyclictest	1800853	-21	kworker/u16:4+events_unbound	22:43:02	4
1441627	99	33	31,2	cyclictest	1800853	-21	kworker/u16:4+events_unbound	22:18:19	4
1441627	99	33	31,2	cyclictest	1800852	-21	kworker/u16:3+events_unbound	22:08:13	4
1441627	99	33	31,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	22:03:41	4
2158966	2	32	0,1	chrt	2158967	-21	cstates	00:29:51	7
1441627	99	32	30,2	cyclictest	2008569	-21	kworker/u16:4+events_unbound	23:58:57	4
1441627	99	32	30,2	cyclictest	1973253	-21	kworker/u16:2+events_unbound	00:06:23	4
1441627	99	32	30,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	22:12:05	4
1441285	2	32	21,8	sleep6	0	-21	swapper/6	19:09:14	6
1441639	99	31	30,0	cyclictest	0	-21	swapper/7	00:06:04	7
1441635	99	31	29,2	cyclictest	1431764	-21	kworker/u16:0+flush-8:0	19:25:10	6
1441627	99	31	29,2	cyclictest	1973253	-21	kworker/u16:2+events_unbound	23:32:03	4
1441627	99	31	29,2	cyclictest	1973253	-21	kworker/u16:2+events_unbound	23:26:39	4
1441627	99	31	29,2	cyclictest	1800853	-21	kworker/u16:4+events_unbound	22:22:44	4
1441627	99	30	28,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:47:12	4
1441627	99	30	28,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	20:59:37	4
1441627	99	30	28,2	cyclictest	1524210	-21	kworker/u16:0+events_unbound	20:29:41	4
1441627	99	30	28,2	cyclictest	1431764	-21	kworker/u16:0+events_unbound	19:28:05	4
1441635	99	29	27,2	cyclictest	2008569	-21	kworker/u16:4+flush-8:0	00:29:56	6
1441635	99	29	25,3	cyclictest	2033114	-21	kworker/u16:5+events_unbound	23:34:53	6
1441627	99	29	27,2	cyclictest	2146064	-21	kworker/u16:2+events_unbound	00:37:35	4
1441627	99	29	27,2	cyclictest	2008569	-21	kworker/u16:4+events_unbound	00:31:35	4
1441627	99	29	27,2	cyclictest	1959800	-21	kworker/u16:3+events_unbound	23:16:54	4
1441627	99	29	27,2	cyclictest	1862183	-21	kworker/u16:1+events_unbound	23:03:51	4
1441627	99	29	27,2	cyclictest	1800853	-21	kworker/u16:4+events_unbound	22:52:19	4
1441627	99	29	27,2	cyclictest	1800853	-21	kworker/u16:4+events_unbound	22:38:07	4
1441627	99	29	27,2	cyclictest	1524210	-21	kworker/u16:0+events_unbound	20:09:37	4
2180244	2	28	0,1	chrt	2180242	-21	ssh	00:35:20	7
1441627	99	28	26,2	cyclictest	2008569	-21	kworker/u16:4+events_unbound	00:16:54	4
1441627	99	28	26,2	cyclictest	1739741	-21	kworker/u16:2+events_unbound	21:38:32	4
1441627	99	28	25,2	cyclictest	1687620	-21	kworker/u16:5+flush-8:0	21:19:59	4
1441639	99	27	0,26	cyclictest	1739740	-21	cat	21:34:39	7
1441627	99	27	25,2	cyclictest	585456	-21	kworker/u16:3+events_unbound	19:59:06	4
1441627	99	27	25,2	cyclictest	2033114	-21	kworker/u16:5+flush-8:0	23:50:09	4
1441627	99	27	25,2	cyclictest	1723310	-21	kworker/u16:1+events_unbound	21:34:07	4
1441627	99	27	25,2	cyclictest	1650539	-21	kworker/u16:0+events_unbound	21:58:07	4
1441627	99	27	25,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	21:09:37	4
1441627	99	27	25,2	cyclictest	1431764	-21	kworker/u16:0+events_unbound	19:21:05	4
1441639	99	26	21,4	cyclictest	1996396	-21	latency_hist	23:19:38	7
1441630	99	26	25,1	cyclictest	1568612	-21	kworker/u16:4+flush-8:0	21:34:39	5
1441630	99	26	23,3	cyclictest	2103344	-21	kworker/u16:0+flush-8:0	00:01:13	5
1441627	99	26	24,2	cyclictest	1973253	-21	kworker/u16:2+events_unbound	23:40:43	4
1441627	99	26	24,2	cyclictest	1610606	-21	kworker/u16:2+events_unbound	20:38:46	4
1441627	99	26	24,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	20:54:05	4
1441627	99	26	24,2	cyclictest	1494214	-21	kworker/u16:2+events_unbound	19:45:17	4
1441627	99	25	23,2	cyclictest	2103344	-21	kworker/u16:0+events_unbound	00:11:14	4
1441627	99	25	23,2	cyclictest	2008569	-21	kworker/u16:4+events_unbound	23:46:27	4
1441627	99	25	23,2	cyclictest	2008569	-21	kworker/u16:4+events_unbound	00:01:38	4
1441627	99	25	23,2	cyclictest	1947487	-21	kworker/u16:0+events_unbound	23:13:10	4
1441627	99	25	23,2	cyclictest	1591376	-21	kworker/u16:1+flush-8:0	20:25:33	4
1441627	99	25	23,2	cyclictest	1591376	-21	kworker/u16:1+flush-8:0	20:25:33	4
1441627	99	25	23,2	cyclictest	1591376	-21	kworker/u16:1+events_unbound	20:41:17	4
1441627	99	25	23,2	cyclictest	1552295	-21	kworker/u16:2+events_unbound	20:17:22	4
1441627	99	25	23,2	cyclictest	1472502	-21	kworker/u16:1+events_unbound	20:01:21	4
1441627	99	25	23,2	cyclictest	1472502	-21	kworker/u16:1+events_unbound	19:37:09	4
1441639	99	24	22,1	cyclictest	0	-21	swapper/7	21:52:29	7
1441639	99	24	22,1	cyclictest	0	-21	swapper/7	21:52:29	7
1441639	99	24	18,5	cyclictest	1649346	-21	latency_hist	20:54:39	7
1441627	99	24	22,2	cyclictest	585456	-21	kworker/u16:3+events_unbound	19:52:21	4
1441627	99	24	22,2	cyclictest	585456	-21	kworker/u16:3+events_unbound	19:14:25	4
1441627	99	24	22,2	cyclictest	1800853	-21	kworker/u16:4+events_unbound	22:46:43	4
1441627	99	24	22,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	21:02:00	4
1441639	99	23	0,21	cyclictest	1776193	-21	latency_hist	21:49:38	7
1441627	99	23	21,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	20:21:56	4
1441627	99	23	21,2	cyclictest	1472502	-21	kworker/u16:1+events_unbound	19:41:01	4
1441627	99	23	21,2	cyclictest	1472502	-21	kworker/u16:1+events_unbound	19:41:01	4
1441627	99	23	21,2	cyclictest	1451191	-21	kworker/u16:2+events_unbound	19:16:14	4
1441635	99	22	19,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	20:39:53	6
1441639	99	21	15,5	cyclictest	1513282	-21	latency_hist	19:44:39	7
1441639	99	21	15,5	cyclictest	1513282	-21	latency_hist	19:44:39	7
1441630	99	21	1,13	cyclictest	0	-21	swapper/5	19:59:55	5
1441627	99	21	19,2	cyclictest	1568612	-21	kworker/u16:4+events_unbound	20:49:21	4
1441627	99	21	19,2	cyclictest	1524210	-21	kworker/u16:0+events_unbound	20:13:53	4
1441627	99	21	19,2	cyclictest	1472502	-21	kworker/u16:1+events_unbound	19:31:21	4
1441635	99	19	17,2	cyclictest	1723310	-21	kworker/u16:1+flush-8:0	21:40:09	6
1865656	2	18	0,0	sleep7	1865658	-21	tr	22:24:57	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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