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 Apr 09, 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
1047734	2	55	45,7	sleep6	0	-21	swapper/6	07:01:31	6
1048071	99	49	46,2	cyclictest	1038683	-21	kworker/u16:1+events_unbound	09:02:07	4
1047687	2	48	38,7	sleep5	0	-21	swapper/5	07:00:49	5
1038680	2	48	34,9	sleep4	0	-21	swapper/4	06:57:11	4
1048075	99	47	45,2	cyclictest	1488252	-21	kworker/u16:1+events_unbound	10:32:09	5
1048075	99	47	45,2	cyclictest	1038683	-21	kworker/u16:1+events_unbound	07:24:09	5
1048075	99	46	43,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:17:25	5
1048082	99	45	39,5	cyclictest	1166793	-21	latency_hist	08:02:07	7
1048075	99	44	42,2	cyclictest	1318249	-21	kworker/u16:0+flush-8:0	10:52:37	5
1048075	99	44	42,2	cyclictest	1318249	-21	kworker/u16:0+flush-8:0	10:52:37	5
1048082	99	42	34,6	cyclictest	650	-21	systemd-journal	07:42:07	7
1048071	99	42	40,2	cyclictest	1748167	-21	kworker/u16:1+events_unbound	12:17:07	4
1048071	99	42	39,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	12:07:09	4
1048071	99	42	39,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	12:07:09	4
1048082	99	41	35,5	cyclictest	1185893	-21	latency_hist	08:12:07	7
1048075	99	41	39,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:23:25	5
1048075	99	40	38,2	cyclictest	1694327	-21	kworker/u16:2+events_unbound	11:59:38	5
1048071	99	40	38,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	10:32:07	4
1038684	2	40	4,31	sleep7	0	-21	swapper/7	06:57:14	7
1048075	99	39	37,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:43:41	5
1048075	99	39	37,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:32:09	5
1048075	99	39	37,2	cyclictest	1038683	-21	kworker/u16:1+events_unbound	09:14:51	5
1048075	99	39	36,2	cyclictest	1748167	-21	kworker/u16:1+events_unbound	12:17:09	5
1048075	99	38	36,2	cyclictest	1764677	-21	kworker/u16:0+events_unbound	12:24:12	5
1048075	99	38	36,2	cyclictest	1413818	-21	kworker/u16:2+events_unbound	09:58:14	5
1048075	99	37	35,2	cyclictest	1620661	-21	kworker/u16:1+events_unbound	11:45:38	5
1048075	99	37	35,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:42:05	5
1048075	99	37	35,2	cyclictest	1303436	-21	kworker/u16:2+events_unbound	09:38:59	5
1048075	99	37	35,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:52:07	5
1048075	99	36	34,2	cyclictest	1764677	-21	kworker/u16:0+events_unbound	12:30:17	5
1048075	99	36	34,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	10:47:25	5
1048075	99	36	34,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	10:47:25	5
1048075	99	36	34,2	cyclictest	1461645	-21	kworker/u16:3+events_unbound	10:15:54	5
1048075	99	36	34,2	cyclictest	1427865	-21	kworker/u16:1+events_unbound	10:06:54	5
1048075	99	36	34,2	cyclictest	1318249	-21	kworker/u16:0+flush-8:0	09:18:09	5
1048075	99	36	34,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	12:10:54	5
1048075	99	36	34,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	12:10:54	5
1048075	99	35	33,2	cyclictest	1119031	-21	kworker/u16:0+events_unbound	07:52:03	5
1048071	99	35	33,2	cyclictest	1548731	-21	kworker/u16:2+events_unbound	11:12:09	4
1048071	99	35	33,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:21:06	4
1048082	99	34	33,0	cyclictest	0	-21	swapper/7	07:22:22	7
1048082	99	34	0,32	cyclictest	1195575	-21	cat	08:17:07	7
1048078	99	34	31,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:17:20	6
1048075	99	34	32,2	cyclictest	1730652	-21	kworker/u16:4+events_unbound	12:13:23	5
1048075	99	34	32,2	cyclictest	1548731	-21	kworker/u16:2+events_unbound	11:00:54	5
1048075	99	34	32,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	10:31:10	5
1048075	99	34	32,2	cyclictest	1342369	-21	kworker/u16:1+events_unbound	09:53:06	5
1048071	99	34	31,2	cyclictest	1303436	-21	kworker/u16:2+events_unbound	09:09:11	4
1048082	99	33	32,0	cyclictest	0	-21	swapper/7	09:42:33	7
1048075	99	33	31,2	cyclictest	1694327	-21	kworker/u16:2+events_unbound	11:56:09	5
1048075	99	33	31,2	cyclictest	1642640	-21	kworker/u16:3+events_unbound	12:03:46	5
1048075	99	33	31,2	cyclictest	1548731	-21	kworker/u16:2+events_unbound	11:36:46	5
1048075	99	33	31,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:18:26	5
1048075	99	33	31,2	cyclictest	1303436	-21	kworker/u16:2+events_unbound	09:25:09	5
1048075	99	33	31,2	cyclictest	1038683	-21	kworker/u16:1+events_unbound	09:08:09	5
1048075	99	33	30,2	cyclictest	1099342	-21	kworker/u16:5+flush-8:0	07:37:33	5
1048075	99	33	30,2	cyclictest	1028817	-21	kworker/u16:3+events_unbound	07:02:11	5
1048071	99	33	29,3	cyclictest	1099352	-21	PK-Backend	07:24:17	4
1048082	99	32	30,1	cyclictest	1557689	-21	strings	10:52:30	7
1048082	99	32	30,1	cyclictest	1557689	-21	strings	10:52:30	7
1048075	99	32	30,2	cyclictest	1303436	-21	kworker/u16:2+events_unbound	09:43:49	5
1048075	99	32	30,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:29:21	5
1048075	99	32	30,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:29:21	5
1048071	99	32	30,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	10:01:06	4
1048075	99	31	29,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	11:10:25	5
1048075	99	31	29,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:41:06	5
1048075	99	31	29,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:03:25	5
1048075	99	31	29,2	cyclictest	1243352	-21	kworker/u16:0+events_unbound	09:05:25	5
1048071	99	31	29,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:23:23	4
1048071	99	31	28,2	cyclictest	1642640	-21	kworker/u16:3+events_unbound	11:43:54	4
1048082	99	30	29,0	cyclictest	0	-21	swapper/7	11:27:25	7
1048082	99	30	29,0	cyclictest	0	-21	swapper/7	11:27:25	7
1048075	99	30	29,1	cyclictest	1620661	-21	kworker/u16:1+events_unbound	11:50:54	5
1048075	99	30	28,2	cyclictest	1548731	-21	kworker/u16:2+events_unbound	11:13:21	5
1048075	99	30	28,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:09:25	5
1048075	99	30	28,2	cyclictest	1243352	-21	kworker/u16:0+flush-8:0	08:52:02	5
1048071	99	30	28,2	cyclictest	1620661	-21	kworker/u16:1+events_unbound	11:22:42	4
1048071	99	30	28,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:40:06	4
1048071	99	30	28,2	cyclictest	1303436	-21	kworker/u16:2+events_unbound	09:33:29	4
1048082	99	29	0,27	cyclictest	1262439	-21	munin-plugin-st	08:52:07	7
1048075	99	29	27,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:31:57	5
1048075	99	29	27,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	11:31:57	5
1048071	99	29	27,2	cyclictest	1694327	-21	kworker/u16:2+events_unbound	12:00:09	4
1048082	99	28	26,1	cyclictest	0	-21	swapper/7	11:42:34	7
1048075	99	28	26,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	10:26:21	5
1048071	99	28	26,2	cyclictest	1488252	-21	kworker/u16:1+events_unbound	10:50:06	4
1048071	99	28	26,2	cyclictest	1488252	-21	kworker/u16:1+events_unbound	10:50:06	4
1048071	99	28	26,2	cyclictest	1427865	-21	kworker/u16:1+events_unbound	10:15:30	4
1048071	99	28	26,2	cyclictest	1427865	-21	kworker/u16:1+events_unbound	10:02:28	4
1048071	99	28	25,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	11:02:09	4
1048071	99	28	25,2	cyclictest	1195576	-21	kworker/u16:3+flush-8:0	08:47:33	4
1048071	99	27	25,2	cyclictest	1642640	-21	kworker/u16:3+events_unbound	11:33:33	4
1048071	99	27	25,2	cyclictest	1548731	-21	kworker/u16:2+events_unbound	10:54:06	4
1048071	99	27	25,2	cyclictest	1548731	-21	kworker/u16:2+events_unbound	10:54:06	4
1048071	99	27	25,2	cyclictest	1463918	-21	kworker/u16:4+events_unbound	10:33:23	4
1048071	99	27	25,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	09:49:09	4
1048071	99	27	25,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:30:06	4
1048071	99	27	25,2	cyclictest	1195576	-21	kworker/u16:3+events_unbound	09:30:06	4
1048082	99	26	0,25	cyclictest	1272083	-21	systemd-run	08:57:07	7
1048071	99	26	24,2	cyclictest	1318249	-21	kworker/u16:0+events_unbound	10:44:02	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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