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 Thu Mar 26, 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
1478121	2	59	48,8	sleep5	0	-21	swapper/5	19:00:01	5
1478338	2	48	25,7	sleep4	0	-21	swapper/4	19:03:05	4
1478630	99	45	42,2	cyclictest	1701937	-21	kworker/u16:2+flush-8:0	22:18:19	6
1478630	99	43	41,2	cyclictest	2095205	-21	kworker/u16:3+events_unbound	00:03:36	6
1478630	99	43	41,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:33:29	6
1478630	99	42	40,2	cyclictest	2155586	-21	kworker/u16:5+events_unbound	00:10:29	6
1478630	99	42	40,2	cyclictest	2155586	-21	kworker/u16:5+events_unbound	00:10:29	6
1478630	99	42	40,2	cyclictest	1890294	-21	kworker/u16:3+events_unbound	22:27:49	6
1478630	99	41	39,2	cyclictest	2121780	-21	kworker/u16:4+events_unbound	00:20:29	6
1478630	99	41	39,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:40:03	6
1478630	99	41	39,2	cyclictest	1431217	-21	kworker/u16:4+flush-8:0	20:08:33	6
1478630	99	39	37,2	cyclictest	2095205	-21	kworker/u16:3+events_unbound	00:01:02	6
1478630	99	39	37,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:28:35	6
1478630	99	39	37,2	cyclictest	1963280	-21	kworker/u16:1+events_unbound	23:19:11	6
1478630	99	39	37,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:50:41	6
1478630	99	39	37,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:40:54	6
1478630	99	39	37,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:37:27	6
1478630	99	39	37,2	cyclictest	1760415	-21	kworker/u16:0+events_unbound	22:17:23	6
1478630	99	39	37,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:47:10	6
1478621	99	39	37,2	cyclictest	1963280	-21	kworker/u16:1+flush-8:0	23:38:21	4
1478273	2	39	3,31	sleep7	0	-21	swapper/7	19:02:12	7
1478630	99	38	36,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:26:19	6
1478630	99	38	36,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:15:12	6
1478630	99	38	36,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:48:02	6
1478630	99	38	36,2	cyclictest	1890294	-21	kworker/u16:3+events_unbound	22:30:54	6
1478630	99	38	36,2	cyclictest	1760415	-21	kworker/u16:0+events_unbound	21:51:59	6
1478630	99	38	36,2	cyclictest	1735898	-21	kworker/u16:3+flush-8:0	21:18:49	6
1478630	99	38	36,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	22:01:06	6
1478630	99	38	36,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	21:17:14	6
1478630	99	38	35,2	cyclictest	1950438	-21	kworker/u16:6+flush-8:0	23:08:04	6
1478621	99	38	36,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:48:32	4
1478630	99	37	35,2	cyclictest	2121780	-21	kworker/u16:4+events_unbound	23:55:30	6
1478630	99	37	35,2	cyclictest	2061435	-21	kworker/u16:2+events_unbound	23:47:07	6
1478630	99	37	35,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:11:35	6
1478630	99	37	35,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:59:22	6
1478630	99	37	35,2	cyclictest	1820292	-21	kworker/u16:1+events_unbound	22:07:02	6
1478630	99	37	35,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	21:26:03	6
1478621	99	37	35,2	cyclictest	1431217	-21	kworker/u16:4+flush-8:0	19:18:26	4
1478621	99	37	34,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:18:35	4
1478328	2	37	27,7	sleep6	0	-21	swapper/6	19:02:59	6
1478635	99	36	30,5	cyclictest	1832280	-21	latency_hist	21:53:05	7
1478630	99	36	34,2	cyclictest	2169673	-21	kworker/u16:2+events_unbound	00:29:38	6
1478630	99	36	34,2	cyclictest	2095205	-21	kworker/u16:3+flush-8:0	00:13:45	6
1478630	99	36	34,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:53:31	6
1478630	99	36	34,2	cyclictest	1735898	-21	kworker/u16:3+events_unbound	21:35:26	6
1478630	99	36	34,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:30:19	6
1478630	99	36	34,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:10:31	6
1478635	99	35	0,34	cyclictest	2159429	-21	sed	00:08:21	7
1478635	99	35	0,34	cyclictest	2159429	-21	sed	00:08:21	7
1478629	99	35	32,2	cyclictest	1431217	-21	kworker/u16:4+flush-8:0	19:18:19	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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