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 Jan 18, 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
1052418	2	58	48,7	sleep4	0	-21	swapper/4	19:05:55	4
1052838	99	42	37,4	cyclictest	1693386	-21	latency_hist	23:57:31	7
1051578	2	42	6,30	sleep7	0	-21	swapper/7	19:03:01	7
1043281	2	38	27,7	sleep5	0	-21	swapper/5	19:02:35	5
1052835	99	37	35,2	cyclictest	1763829	-21	kworker/u16:2+events_unbound	00:31:17	6
1052835	99	37	35,2	cyclictest	1669083	-21	kworker/u16:1+events_unbound	00:16:20	6
1052835	99	37	35,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	23:21:04	6
1052835	99	36	34,2	cyclictest	1631558	-21	kworker/u16:0+events_unbound	23:44:05	6
1052835	99	35	33,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	22:49:46	6
1052835	99	35	33,2	cyclictest	1377831	-21	kworker/u16:2+events_unbound	21:59:46	6
1052270	2	35	25,7	sleep6	0	-21	swapper/6	19:03:49	6
1052835	99	34	32,2	cyclictest	1669083	-21	kworker/u16:1+events_unbound	00:23:51	6
1052835	99	34	32,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	22:56:38	6
1052835	99	34	32,2	cyclictest	1472323	-21	kworker/u16:4+events_unbound	22:36:59	6
1052835	99	34	32,2	cyclictest	1260415	-21	kworker/u16:1+events_unbound	22:26:24	6
1052838	99	33	0,31	cyclictest	902	-21	dbus-daemon	19:37:32	7
1052835	99	33	31,2	cyclictest	1608573	-21	kworker/u16:4+events_unbound	23:30:40	6
1052835	99	33	31,2	cyclictest	1566482	-21	kworker/u16:3+events_unbound	23:05:26	6
1052835	99	33	31,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	23:15:27	6
1052835	99	33	31,2	cyclictest	1270510	-21	kworker/u16:3+events_unbound	21:30:54	6
1052835	99	33	31,2	cyclictest	1270510	-21	kworker/u16:3+events_unbound	21:27:17	6
1052835	99	33	31,2	cyclictest	1260415	-21	kworker/u16:1+events_unbound	21:54:10	6
1052835	99	32	30,2	cyclictest	1631558	-21	kworker/u16:0+events_unbound	00:22:06	6
1052835	99	32	30,2	cyclictest	1608573	-21	kworker/u16:4+flush-8:0	23:38:12	6
1052835	99	32	30,2	cyclictest	1535686	-21	kworker/u16:1+events_unbound	23:02:22	6
1052835	99	32	30,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	21:14:27	6
1052835	99	32	30,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	20:08:18	6
1052835	99	31	29,2	cyclictest	1763829	-21	kworker/u16:2+events_unbound	00:33:26	6
1052835	99	31	29,2	cyclictest	1669083	-21	kworker/u16:1+events_unbound	23:59:18	6
1052835	99	31	29,2	cyclictest	1631558	-21	kworker/u16:0+events_unbound	23:54:54	6
1052835	99	31	29,2	cyclictest	1608573	-21	kworker/u16:4+events_unbound	00:04:54	6
1052835	99	31	29,2	cyclictest	1608573	-21	kworker/u16:4+events_unbound	00:04:54	6
1052835	99	31	29,2	cyclictest	1584668	-21	kworker/u16:2+events_unbound	23:26:42	6
1052835	99	31	29,2	cyclictest	1584668	-21	kworker/u16:2+events_unbound	23:26:42	6
1052835	99	31	29,2	cyclictest	1400665	-21	kworker/u16:5+events_unbound	22:17:03	6
1052838	99	30	29,0	cyclictest	0	-21	swapper/7	20:02:50	7
1052835	99	30	28,2	cyclictest	1608573	-21	kworker/u16:4+events_unbound	23:33:54	6
1052835	99	30	28,2	cyclictest	1608573	-21	kworker/u16:4+events_unbound	00:09:55	6
1052835	99	30	28,2	cyclictest	1426443	-21	kworker/u16:2+flush-8:0	22:18:14	6
1052835	99	30	28,2	cyclictest	1400665	-21	kworker/u16:5+events_unbound	22:04:15	6
1052835	99	30	28,2	cyclictest	1400665	-21	kworker/u16:5+events_unbound	22:04:15	6
1052835	99	30	28,2	cyclictest	1270510	-21	kworker/u16:3+events_unbound	21:33:27	6
1052835	99	30	28,2	cyclictest	1260415	-21	kworker/u16:1+events_unbound	22:30:23	6
1052835	99	30	28,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	21:49:03	6
1052835	99	30	28,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	20:43:42	6
1052835	99	30	28,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	19:25:42	6
1052838	99	29	28,0	cyclictest	0	-21	swapper/7	23:42:53	7
1052835	99	29	27,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	22:44:27	6
1052835	99	29	27,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	22:44:27	6
1052835	99	29	27,2	cyclictest	1270510	-21	kworker/u16:3+events_unbound	21:11:59	6
1052835	99	29	27,2	cyclictest	1260415	-21	kworker/u16:1+events_unbound	21:46:58	6
1052835	99	29	27,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	19:58:18	6
1052835	99	29	27,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	19:58:18	6
1052838	99	28	27,0	cyclictest	0	-21	swapper/7	21:22:55	7
1052838	99	28	1,26	cyclictest	1729930	-21	date	00:12:31	7
1052835	99	28	26,2	cyclictest	1499148	-21	kworker/u16:0+events_unbound	22:41:02	6
1052835	99	28	26,2	cyclictest	1270510	-21	kworker/u16:3+flush-8:0	21:39:23	6
1052838	99	27	26,0	cyclictest	0	-21	swapper/7	20:42:54	7
1052835	99	27	25,2	cyclictest	979691	-21	kworker/u16:0+events_unbound	19:17:22	6
1052835	99	27	25,2	cyclictest	979691	-21	kworker/u16:0+events_unbound	19:17:22	6
1052835	99	27	25,2	cyclictest	1669083	-21	kworker/u16:1+events_unbound	23:49:22	6
1052835	99	27	25,2	cyclictest	1535686	-21	kworker/u16:1+events_unbound	23:10:54	6
1052835	99	27	25,2	cyclictest	1062453	-21	kworker/u16:1+events_unbound	19:44:37	6
1052835	99	27	25,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	19:52:17	6
1052835	99	27	25,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	19:42:17	6
1052835	99	27	24,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	20:02:34	6
1052821	99	27	26,1	cyclictest	1270510	-21	kworker/u16:3+events_unbound	21:10:48	4
1413614	2	26	0,1	chrt	1413612	-21	ssh	22:02:01	7
1052838	99	26	24,1	cyclictest	1474765	-21	awk	22:27:31	7
1052838	99	26	17,8	cyclictest	1499105	-21	latency_hist	22:37:31	7
1052835	99	26	24,2	cyclictest	979691	-21	kworker/u16:0+flush-8:0	19:08:41	6
1052835	99	26	24,2	cyclictest	1241755	-21	kworker/u16:2+events_unbound	20:49:46	6
1052835	99	26	24,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	20:28:40	6
1052838	99	25	24,0	cyclictest	0	-21	swapper/7	20:17:47	7
1052838	99	25	23,1	cyclictest	1569009	-21	ssh	23:02:55	7
1052838	99	25	21,2	cyclictest	1060	-21	runrttasks	00:22:53	7
1052838	99	25	19,5	cyclictest	1134152	-21	latency_hist	19:47:31	7
1052838	99	25	0,24	cyclictest	902	-21	dbus-daemon	23:52:31	7
1052835	99	25	23,2	cyclictest	1400665	-21	kworker/u16:5+events_unbound	22:08:39	6
1052835	99	25	23,2	cyclictest	1270510	-21	kworker/u16:3+flush-8:0	21:19:40	6
1052835	99	25	23,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	20:54:02	6
1052835	99	25	23,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	20:40:33	6
1052835	99	25	23,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	20:24:57	6
1052838	99	24	0,23	cyclictest	1211546	-21	latency_hist	20:27:32	7
1052835	99	24	22,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	20:35:22	6
1052835	99	24	22,2	cyclictest	1144174	-21	kworker/u16:0+events_unbound	19:56:58	6
1052835	99	24	22,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	19:20:45	6
1052835	99	24	21,2	cyclictest	1260415	-21	kworker/u16:1+events_unbound	21:00:37	6
1052838	99	23	22,0	cyclictest	0	-21	swapper/7	23:17:54	7
1052838	99	23	22,0	cyclictest	0	-21	swapper/7	20:47:53	7
1052838	99	23	20,2	cyclictest	1698425	-21	ssh	23:57:49	7
1052835	99	23	21,2	cyclictest	1241755	-21	kworker/u16:2+events_unbound	21:05:14	6
1052835	99	23	21,2	cyclictest	1062453	-21	kworker/u16:1+flush-8:0	19:37:01	6
1052835	99	23	21,2	cyclictest	1051156	-21	kworker/u16:5+events_unbound	20:21:18	6
1052821	99	23	21,2	cyclictest	1062453	-21	kworker/u16:1+flush-8:0	19:37:46	4
1052838	99	22	21,0	cyclictest	0	-21	swapper/7	23:37:37	7
1052835	99	21	19,2	cyclictest	1095566	-21	kworker/u16:3+events_unbound	19:29:09	6
1052838	99	19	0,18	cyclictest	1377410	-21	latency_hist	21:47:32	7
1052835	99	18	16,2	cyclictest	1182212	-21	kworker/u16:1+flush-8:0	20:15:46	6
1052838	99	17	9,7	cyclictest	0	-21	swapper/7	22:22:31	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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