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 Nov 30, 2025 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1428807	99	57	50,5	cyclictest	2068332	-21	latency_hist	20:37:59	7
1428346	2	53	43,7	sleep6	0	-21	swapper/6	15:21:54	6
1428807	99	48	40,7	cyclictest	589235	-21	systemd-journal	18:29:45	7
1428806	99	47	44,2	cyclictest	727396	-21	kworker/u16:4+flush-8:0	16:22:59	6
1428336	2	46	36,7	sleep5	0	-21	swapper/5	15:21:45	5
1428803	99	45	43,2	cyclictest	1976468	-21	kworker/u16:5+flush-8:0	19:51:14	5
1428807	99	44	39,4	cyclictest	1755420	-21	latency_hist	18:02:59	7
1428803	99	44	42,2	cyclictest	1786017	-21	kworker/u16:2+events_unbound	18:46:15	5
1428803	99	44	42,2	cyclictest	1705128	-21	kworker/u16:4+events_unbound	18:08:42	5
1428803	99	44	42,2	cyclictest	1504373	-21	kworker/u16:3+events_unbound	16:06:14	5
1428801	99	44	42,2	cyclictest	1926738	-21	kworker/u16:2+events_unbound	19:52:13	4
1428803	99	43	41,2	cyclictest	1936843	-21	kworker/u16:4+events_unbound	19:42:13	5
1419613	2	43	3,30	sleep7	0	-21	swapper/7	15:18:18	7
1428803	99	42	39,2	cyclictest	1583930	-21	kworker/u16:1+flush-8:0	16:48:25	5
1428384	2	42	32,7	sleep4	0	-21	swapper/4	15:22:24	4
1428803	99	41	39,2	cyclictest	727396	-21	kworker/u16:4+flush-8:0	15:43:26	5
1428803	99	41	39,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	19:25:13	5
1428803	99	41	39,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	19:25:13	5
1428803	99	41	39,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	17:56:14	5
1428803	99	41	39,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	17:56:14	5
1428803	99	41	38,2	cyclictest	1786017	-21	kworker/u16:2+flush-8:0	19:18:05	5
1428803	99	40	38,2	cyclictest	1624626	-21	kworker/u16:5+flush-8:0	17:02:14	5
1428803	99	39	37,2	cyclictest	1786017	-21	kworker/u16:2+events_unbound	18:59:13	5
1428806	99	38	36,2	cyclictest	727396	-21	kworker/u16:4+events_unbound	15:43:28	6
1428803	99	38	36,2	cyclictest	1926738	-21	kworker/u16:2+flush-8:0	20:03:22	5
1428803	99	38	36,2	cyclictest	1905829	-21	kworker/u16:1+events_unbound	19:57:14	5
1428803	99	38	36,2	cyclictest	1624626	-21	kworker/u16:5+events_unbound	17:09:14	5
1428807	99	37	0,35	cyclictest	1987517	-21	latency_hist	19:57:58	7
1428806	99	37	35,2	cyclictest	1877446	-21	kworker/u16:3+events_unbound	19:12:13	6
1428806	99	37	35,2	cyclictest	1705128	-21	kworker/u16:4+events_unbound	17:58:28	6
1428803	99	37	35,2	cyclictest	727396	-21	kworker/u16:4+events_unbound	16:09:14	5
1428803	99	37	35,2	cyclictest	2037010	-21	kworker/u16:5+events_unbound	20:22:13	5
1428803	99	37	35,2	cyclictest	1452712	-21	kworker/u16:2+events_unbound	15:33:14	5
1428801	99	37	35,2	cyclictest	727396	-21	kworker/u16:4+flush-8:0	16:21:14	4
1428806	99	36	34,2	cyclictest	1976468	-21	kworker/u16:5+events_unbound	20:03:25	6
1428806	99	36	34,2	cyclictest	1877446	-21	kworker/u16:3+flush-8:0	19:28:25	6
1428803	99	36	35,1	cyclictest	1815647	-21	kworker/u16:4+flush-8:0	18:38:29	5
1428803	99	36	35,1	cyclictest	1815647	-21	kworker/u16:4+flush-8:0	18:38:29	5
1428803	99	36	34,2	cyclictest	2077505	-21	kworker/u16:1+flush-8:0	20:47:53	5
1428803	99	36	34,2	cyclictest	2016814	-21	kworker/u16:3+flush-8:0	20:13:59	5
1428801	99	36	34,2	cyclictest	1705128	-21	kworker/u16:4+flush-8:0	17:43:14	4
1428806	99	35	33,2	cyclictest	1705128	-21	kworker/u16:4+events_unbound	18:11:09	6
1428806	99	35	33,2	cyclictest	1462926	-21	kworker/u16:1+events_unbound	15:39:18	6
1428806	99	35	32,2	cyclictest	727396	-21	kworker/u16:4+events_unbound	16:43:02	6
1428803	99	35	33,2	cyclictest	1504373	-21	kworker/u16:3+flush-8:0	16:33:24	5
1428807	99	34	29,4	cyclictest	1563695	-21	latency_hist	16:27:59	7
1428806	99	34	32,2	cyclictest	1418253	-21	kworker/u16:0+events_unbound	15:52:14	6
1428806	99	34	31,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	17:38:09	6
1428801	99	34	32,2	cyclictest	727396	-21	kworker/u16:4+events_unbound	16:00:14	4
1428801	99	34	32,2	cyclictest	1926738	-21	kworker/u16:2+flush-8:0	20:01:13	4
1428801	99	34	32,2	cyclictest	1418253	-21	kworker/u16:0+flush-8:0	15:46:13	4
1428806	99	33	31,2	cyclictest	2059429	-21	kworker/u16:0+events_unbound	20:50:08	6
1428806	99	33	31,2	cyclictest	2037010	-21	kworker/u16:5+flush-8:0	20:22:58	6
1428806	99	33	31,2	cyclictest	1885644	-21	kworker/u16:4+flush-8:0	19:06:14	6
1428806	99	33	31,2	cyclictest	1428358	-21	kworker/u16:3+flush-8:0	15:23:10	6
1428803	99	33	31,2	cyclictest	2059429	-21	kworker/u16:0+events_unbound	20:50:15	5
1428801	99	33	31,2	cyclictest	727396	-21	kworker/u16:4+flush-8:0	17:23:26	4
1428801	99	33	31,2	cyclictest	1786017	-21	kworker/u16:2+events_unbound	18:50:10	4
1428801	99	33	31,2	cyclictest	1705128	-21	kworker/u16:4+flush-8:0	17:58:27	4
1428801	99	33	31,2	cyclictest	1502859	-21	kworker/u16:2+events_unbound	15:54:09	4
1428807	99	32	27,4	cyclictest	1553618	-21	latency_hist	16:22:59	7
1428806	99	32	30,2	cyclictest	1786017	-21	kworker/u16:2+flush-8:0	19:13:51	6
1428806	99	32	30,2	cyclictest	1418253	-21	kworker/u16:0+flush-8:0	15:31:02	6
1428803	99	32	30,2	cyclictest	1936843	-21	kworker/u16:4+flush-8:0	19:37:14	5
1428803	99	32	30,2	cyclictest	1786017	-21	kworker/u16:2+events_unbound	19:12:58	5
1428801	99	32	30,2	cyclictest	1926738	-21	kworker/u16:2+events_unbound	19:55:22	4
1428801	99	32	30,2	cyclictest	1877446	-21	kworker/u16:3+flush-8:0	19:28:25	4
1428801	99	32	30,2	cyclictest	1644873	-21	kworker/u16:2+events_unbound	17:12:58	4
1428806	99	31	29,2	cyclictest	2027963	-21	kworker/u16:4+events_unbound	20:29:09	6
1428806	99	31	29,2	cyclictest	1705128	-21	kworker/u16:4+flush-8:0	18:13:34	6
1428806	99	31	29,2	cyclictest	1680077	-21	kworker/u16:0+flush-8:0	19:00:02	6
1428803	99	31	29,2	cyclictest	1502859	-21	kworker/u16:2+events_unbound	16:30:14	5
1428801	99	31	29,2	cyclictest	2016814	-21	kworker/u16:3+events_unbound	20:49:54	4
1428801	99	31	29,2	cyclictest	1705128	-21	kworker/u16:4+events_unbound	18:17:10	4
1428801	99	31	29,2	cyclictest	1624626	-21	kworker/u16:5+events_unbound	17:29:58	4
1428807	99	30	28,1	cyclictest	0	-21	swapper/7	20:18:24	7
1428807	99	30	25,4	cyclictest	589235	-21	systemd-journal	17:42:59	7
1428806	99	30	28,2	cyclictest	1734488	-21	kworker/u16:1+events_unbound	17:54:22	6
1428806	99	30	28,2	cyclictest	1734488	-21	kworker/u16:1+events_unbound	17:54:22	6
1428806	99	30	28,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	19:49:58	6
1428806	99	30	28,2	cyclictest	1644153	-21	kworker/u16:1+flush-8:0	17:05:18	6
1428806	99	30	28,2	cyclictest	1452712	-21	kworker/u16:2+flush-8:0	15:34:03	6
1428806	99	30	27,2	cyclictest	1926738	-21	kworker/u16:2+flush-8:0	19:58:09	6
1428803	99	30	28,2	cyclictest	1452712	-21	kworker/u16:2+flush-8:0	15:32:54	5
1428803	99	30	26,3	cyclictest	1815621	-21	packagekitd	18:29:29	5
1428801	99	30	28,2	cyclictest	727396	-21	kworker/u16:4+events_unbound	15:32:18	4
1428801	99	30	28,2	cyclictest	2016814	-21	kworker/u16:3+events_unbound	20:19:25	4
1428801	99	30	28,2	cyclictest	1936843	-21	kworker/u16:4+flush-8:0	19:38:14	4
1428801	99	30	28,2	cyclictest	1877446	-21	kworker/u16:3+events_unbound	19:27:02	4
1428801	99	30	28,2	cyclictest	1877446	-21	kworker/u16:3+events_unbound	19:27:02	4
1428801	99	30	28,2	cyclictest	1705128	-21	kworker/u16:4+events_unbound	17:41:50	4
1428801	99	30	28,2	cyclictest	1502859	-21	kworker/u16:2+flush-8:0	16:12:10	4
1428801	99	30	28,2	cyclictest	1462926	-21	kworker/u16:1+flush-8:0	15:39:10	4
1428801	99	30	27,2	cyclictest	1504373	-21	kworker/u16:3+flush-8:0	16:03:15	4
1428806	99	29	27,2	cyclictest	2037010	-21	kworker/u16:5+flush-8:0	20:43:45	6
1428806	99	29	27,2	cyclictest	1905829	-21	kworker/u16:1+events_unbound	19:57:10	6
1428806	99	29	27,2	cyclictest	1905829	-21	kworker/u16:1+events_unbound	19:45:17	6
1428806	99	29	27,2	cyclictest	1680077	-21	kworker/u16:0+events_unbound	18:22:42	6
1428806	99	29	27,2	cyclictest	1624626	-21	kworker/u16:5+flush-8:0	17:09:30	6
1428806	99	29	26,2	cyclictest	1418253	-21	kworker/u16:0+flush-8:0	16:03:00	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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