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 Wed Jun 24, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1275345	2	59	48,8	sleep4	0	-21	swapper/4	19:07:29	4
1275765	99	47	45,2	cyclictest	1865779	-21	kworker/u16:3+events_unbound	00:09:33	4
1275765	99	44	42,2	cyclictest	1806918	-21	kworker/u16:0+events_unbound	23:09:32	4
1275292	2	43	6,31	sleep7	0	-21	swapper/7	19:06:43	7
1275765	99	41	39,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	21:24:33	4
1275765	99	40	37,2	cyclictest	1237065	-21	kworker/u16:2+events_unbound	19:14:37	4
1275364	2	40	30,7	sleep5	0	-21	swapper/5	19:07:46	5
1275766	99	34	32,2	cyclictest	1525513	-21	kworker/u16:4+flush-8:0	21:49:48	5
1275766	99	34	32,2	cyclictest	1525513	-21	kworker/u16:4+flush-8:0	21:49:48	5
1275765	99	34	32,2	cyclictest	536606	-21	kworker/u16:1+events_unbound	22:05:49	4
1275765	99	34	32,2	cyclictest	1721466	-21	kworker/u16:3+events_unbound	22:49:12	4
1275195	2	34	9,8	sleep6	0	-21	swapper/6	19:05:22	6
1275765	99	33	31,2	cyclictest	1807325	-21	kworker/u16:4+events_unbound	23:56:32	4
1275765	99	33	31,2	cyclictest	1709300	-21	kworker/u16:2+flush-8:0	22:40:17	4
1275765	99	33	31,2	cyclictest	1660382	-21	kworker/u16:0+events_unbound	22:59:24	4
1275765	99	32	30,2	cyclictest	1525514	-21	kworker/u16:5+events_unbound	22:25:29	4
1275765	99	31	29,2	cyclictest	536606	-21	kworker/u16:1+events_unbound	21:46:48	4
1275765	99	31	29,2	cyclictest	1929921	-21	kworker/u16:0+events_unbound	00:18:17	4
1275765	99	31	29,2	cyclictest	1865779	-21	kworker/u16:3+events_unbound	00:04:28	4
1275765	99	31	29,2	cyclictest	1792448	-21	kworker/u16:1+events_unbound	23:29:16	4
1275765	99	31	29,2	cyclictest	1525513	-21	kworker/u16:4+events_unbound	22:18:53	4
1275765	99	31	29,2	cyclictest	1517412	-21	kworker/u16:3+events_unbound	21:13:30	4
1608756	2	30	0,0	chrt	1608754	-21	ssh	21:45:32	7
1275765	99	30	28,2	cyclictest	1525513	-21	kworker/u16:4+events_unbound	22:01:29	4
1275765	99	30	28,2	cyclictest	1405199	-21	kworker/u16:3+events_unbound	20:20:09	4
1275775	99	29	0,27	cyclictest	1721232	-21	latency_hist	22:34:33	7
1275775	99	29	0,27	cyclictest	1721232	-21	latency_hist	22:34:33	7
1275765	99	29	27,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	21:30:09	4
1275765	99	29	27,2	cyclictest	1721466	-21	kworker/u16:3+events_unbound	23:15:37	4
1275775	99	28	27,0	cyclictest	0	-21	swapper/7	21:42:10	7
1275765	99	28	27,1	cyclictest	1865779	-21	kworker/u16:3+events_unbound	23:39:08	4
1275765	99	28	26,2	cyclictest	2003056	-21	kworker/u16:1+events_unbound	00:33:20	4
1275765	99	28	26,2	cyclictest	1929921	-21	kworker/u16:0+events_unbound	00:28:21	4
1275765	99	28	26,2	cyclictest	1807325	-21	kworker/u16:4+events_unbound	23:41:25	4
1275765	99	28	26,2	cyclictest	1792448	-21	kworker/u16:1+events_unbound	23:31:17	4
1275765	99	28	26,2	cyclictest	1525513	-21	kworker/u16:4+flush-8:0	21:58:41	4
1275765	99	28	26,2	cyclictest	1525513	-21	kworker/u16:4+events_unbound	21:27:33	4
1275775	99	27	22,4	cyclictest	650	-21	systemd-journal	19:14:39	7
1275765	99	27	25,2	cyclictest	1865779	-21	kworker/u16:3+events_unbound	00:35:29	4
1275765	99	27	25,2	cyclictest	1721466	-21	kworker/u16:3+events_unbound	23:12:08	4
1275765	99	27	25,2	cyclictest	1709300	-21	kworker/u16:2+events_unbound	22:51:33	4
1275765	99	27	25,2	cyclictest	1660382	-21	kworker/u16:0+events_unbound	22:11:04	4
1275765	99	27	24,2	cyclictest	1328354	-21	kworker/u16:0+events_unbound	21:14:41	4
1275775	99	26	25,0	cyclictest	0	-21	swapper/7	23:20:20	7
1275770	99	26	24,2	cyclictest	536606	-21	kworker/u16:1+events_unbound	19:29:48	6
1275766	99	26	24,2	cyclictest	1525514	-21	kworker/u16:5+events_unbound	22:19:49	5
1275765	99	26	24,2	cyclictest	1929921	-21	kworker/u16:0+events_unbound	00:21:44	4
1275765	99	26	24,2	cyclictest	1792448	-21	kworker/u16:1+flush-8:0	23:20:21	4
1275765	99	26	24,2	cyclictest	1721466	-21	kworker/u16:3+events_unbound	23:02:08	4
1275765	99	26	24,2	cyclictest	1525513	-21	kworker/u16:4+events_unbound	21:50:07	4
1275765	99	26	24,2	cyclictest	1525513	-21	kworker/u16:4+events_unbound	21:50:07	4
1275765	99	26	23,2	cyclictest	1880648	-21	kworker/u16:5+events_unbound	23:49:37	4
1275765	99	26	23,2	cyclictest	1265933	-21	kworker/u16:4+events_unbound	19:09:36	4
1275775	99	25	24,0	cyclictest	0	-21	swapper/7	21:53:50	7
1275775	99	25	24,0	cyclictest	0	-21	swapper/7	21:53:50	7
1275766	99	25	23,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	20:44:49	5
1275766	99	25	23,2	cyclictest	1660382	-21	kworker/u16:0+flush-8:0	22:34:38	5
1275765	99	25	23,2	cyclictest	536606	-21	kworker/u16:1+events_unbound	21:38:33	4
1275765	99	25	23,2	cyclictest	1792448	-21	kworker/u16:1+events_unbound	23:46:53	4
1275765	99	25	23,2	cyclictest	1721466	-21	kworker/u16:3+events_unbound	22:35:25	4
1275765	99	25	23,2	cyclictest	1660382	-21	kworker/u16:0+events_unbound	22:22:53	4
1275765	99	25	23,2	cyclictest	1525514	-21	kworker/u16:5+flush-8:0	22:32:32	4
1275765	99	25	23,2	cyclictest	1525514	-21	kworker/u16:5+flush-8:0	22:32:32	4
1275775	99	24	23,0	cyclictest	0	-21	swapper/7	23:48:19	7
1275775	99	24	23,0	cyclictest	0	-21	swapper/7	19:59:22	7
1275766	99	24	22,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	22:29:48	5
1275766	99	24	22,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	22:29:48	5
1275766	99	24	22,2	cyclictest	1347684	-21	kworker/u16:4+events_unbound	20:09:48	5
1275765	99	24	22,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	21:41:57	4
1275775	99	23	22,0	cyclictest	0	-21	swapper/7	23:39:41	7
1275770	99	23	21,2	cyclictest	2003056	-21	kworker/u16:1+events_unbound	00:34:48	6
1275766	99	23	21,2	cyclictest	1880648	-21	kworker/u16:5+flush-8:0	23:44:57	5
1275766	99	23	21,2	cyclictest	1721466	-21	kworker/u16:3+flush-8:0	22:39:52	5
1275766	99	23	20,2	cyclictest	1328354	-21	kworker/u16:0+flush-8:0	21:14:56	5
1275765	99	23	21,2	cyclictest	1929973	-21	kworker/u16:1+events_unbound	00:12:12	4
1275765	99	23	21,2	cyclictest	1347684	-21	kworker/u16:4+flush-8:0	19:49:54	4
1275765	99	23	20,3	cyclictest	1328354	-21	kworker/u16:0+events_unbound	19:44:57	4
1275775	99	22	21,0	cyclictest	0	-21	swapper/7	21:05:53	7
1275775	99	22	21,0	cyclictest	0	-21	swapper/7	21:05:53	7
1275775	99	22	20,1	cyclictest	1721708	-21	ssh	22:34:44	7
1275766	99	22	20,2	cyclictest	1347684	-21	kworker/u16:4+events_unbound	19:54:53	5
1275775	99	21	20,0	cyclictest	0	-21	swapper/7	22:25:22	7
1275775	99	21	20,0	cyclictest	0	-21	swapper/7	20:18:53	7
1275775	99	21	20,0	cyclictest	0	-21	swapper/7	19:41:02	7
1275775	99	21	20,0	cyclictest	0	-21	swapper/7	19:39:09	7
1275775	99	21	20,0	cyclictest	0	-21	swapper/7	19:39:09	7
1275775	99	21	15,5	cyclictest	1285357	-21	latency_hist	19:14:34	7
1275766	99	21	19,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	21:34:49	5
1275766	99	21	19,2	cyclictest	1598050	-21	kworker/u16:0+flush-8:0	21:45:02	5
1275775	99	20	19,0	cyclictest	0	-21	swapper/7	21:02:06	7
1275775	99	20	19,0	cyclictest	0	-21	swapper/7	20:22:01	7
1275775	99	20	19,0	cyclictest	0	-21	swapper/7	19:33:09	7
1275775	99	20	19,0	cyclictest	0	-21	swapper/7	00:29:45	7
1275775	99	20	18,1	cyclictest	0	-21	swapper/7	20:29:52	7
1275766	99	20	18,2	cyclictest	536606	-21	kworker/u16:1+events_unbound	20:39:48	5
1275766	99	20	18,2	cyclictest	1464633	-21	kworker/u16:2+flush-8:0	20:54:49	5
1275766	99	20	18,2	cyclictest	1347684	-21	kworker/u16:4+flush-8:0	20:04:49	5
1275765	99	20	18,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	19:35:07	4
1275765	99	20	18,2	cyclictest	536606	-21	kworker/u16:1+flush-8:0	19:35:07	4
1275775	99	19	18,0	cyclictest	0	-21	swapper/7	20:34:41	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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