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 50 highest latencies:

System rack0slot2.osadl.org (updated Wed Sep 23, 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
1574056	2	100	0,1	sleep7	1574059	-21	cut	19:34:30	7
1519074	2	76	65,7	sleep5	0	-21	swapper/5	19:06:24	5
1519543	99	57	55,2	cyclictest	1842783	-21	kworker/u16:3+events_unbound	21:59:11	5
1519048	2	54	20,29	sleep7	0	-21	swapper/7	19:06:02	7
1519548	99	51	44,5	cyclictest	1630360	-21	latency_hist	20:04:11	7
1519545	99	50	48,2	cyclictest	2169366	-21	kworker/u16:5+events_unbound	00:09:44	6
1519545	99	46	43,2	cyclictest	1565486	-21	kworker/u16:0+events_unbound	19:34:28	6
1519543	99	46	44,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	22:29:28	5
1519543	99	45	43,2	cyclictest	1948514	-21	kworker/u16:1+flush-8:0	22:49:44	5
1519543	99	45	43,2	cyclictest	1948514	-21	kworker/u16:1+events_unbound	23:04:43	5
1519251	2	45	34,8	sleep4	0	-21	swapper/4	19:08:56	4
1519545	99	44	42,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	21:44:45	6
1519543	99	43	41,2	cyclictest	87876	-21	kworker/u16:5+flush-8:0	20:19:43	5
1519543	99	43	39,3	cyclictest	1690177	-21	kworker/u16:0+flush-8:0	21:34:36	5
1519545	99	41	39,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	22:19:48	6
1519543	99	41	39,2	cyclictest	1529152	-21	kworker/u16:3+flush-8:0	20:04:40	5
1519545	99	40	38,2	cyclictest	1746646	-21	kworker/u16:1+events_unbound	22:04:24	6
1519545	99	40	37,2	cyclictest	1746646	-21	kworker/u16:1+events_unbound	21:24:32	6
1519545	99	40	37,2	cyclictest	1565486	-21	kworker/u16:0+flush-8:0	20:04:36	6
1519543	99	40	38,2	cyclictest	2169366	-21	kworker/u16:5+flush-8:0	00:14:43	5
1519543	99	40	38,2	cyclictest	1842783	-21	kworker/u16:3+flush-8:0	21:54:45	5
1519543	99	40	38,2	cyclictest	1565486	-21	kworker/u16:0+flush-8:0	19:44:26	5
1607735	2	39	0,0	chrt	0	-21	swapper/4	19:49:33	4
1519545	99	38	36,2	cyclictest	1690177	-21	kworker/u16:0+flush-8:0	23:49:40	6
1519545	99	38	36,2	cyclictest	1690177	-21	kworker/u16:0+flush-8:0	23:49:40	6
1519545	99	38	36,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	21:49:11	6
1519545	99	38	36,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	21:49:11	6
1519543	99	38	36,2	cyclictest	1948514	-21	kworker/u16:1+events_unbound	22:44:43	5
1519543	99	38	36,2	cyclictest	1842783	-21	kworker/u16:3+events_unbound	21:47:29	5
1519543	99	38	36,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	23:44:08	5
1519543	99	38	36,2	cyclictest	1529152	-21	kworker/u16:3+events_unbound	19:29:41	5
1519545	99	37	35,2	cyclictest	1948514	-21	kworker/u16:1+flush-8:0	22:44:51	6
1519545	99	37	35,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	21:04:10	6
1519543	99	37	35,2	cyclictest	2217371	-21	kworker/u16:0+flush-8:0	00:24:55	5
1519543	99	37	35,2	cyclictest	1948514	-21	kworker/u16:1+events_unbound	22:34:39	5
1519543	99	37	35,2	cyclictest	1690177	-21	kworker/u16:0+flush-8:0	22:21:24	5
1519543	99	37	35,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	23:36:23	5
1519545	99	36	34,2	cyclictest	1756847	-21	kworker/u16:2+events_unbound	21:14:12	6
1519543	99	36	34,2	cyclictest	1948514	-21	kworker/u16:1+events_unbound	00:14:00	5
1519543	99	36	33,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	23:29:11	5
1519543	99	35	33,2	cyclictest	2085372	-21	kworker/u16:2+flush-8:0	23:58:00	5
1519543	99	35	33,2	cyclictest	1690177	-21	kworker/u16:0+flush-8:0	21:24:24	5
1519543	99	35	32,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	20:44:12	5
1519545	99	34	32,2	cyclictest	1948514	-21	kworker/u16:1+flush-8:0	23:29:43	6
1519545	99	34	32,2	cyclictest	1948514	-21	kworker/u16:1+flush-8:0	22:49:40	6
1519545	99	34	32,2	cyclictest	1948514	-21	kworker/u16:1+events_unbound	23:35:32	6
1519545	99	34	32,2	cyclictest	1902407	-21	kworker/u16:2+events_unbound	22:37:08	6
1519545	99	34	32,2	cyclictest	1842783	-21	kworker/u16:3+events_unbound	23:10:00	6
1519545	99	34	32,2	cyclictest	1756847	-21	kworker/u16:2+events_unbound	21:43:09	6
1519545	99	34	32,2	cyclictest	1690177	-21	kworker/u16:0+events_unbound	23:41:39	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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