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 Dec 11, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1608128	99	56	51,4	cyclictest	2055914	-21	latency_hist	19:02:15	7
1607645	2	54	43,8	sleep4	0	-21	swapper/4	15:20:20	4
1607628	2	53	43,7	sleep6	0	-21	swapper/6	15:20:06	6
1608128	99	49	44,4	cyclictest	2015561	-21	latency_hist	18:42:15	7
1607646	2	47	37,7	sleep5	0	-21	swapper/5	15:20:21	5
1608120	99	46	44,2	cyclictest	2096251	-21	kworker/u16:1+events_unbound	19:43:47	6
1608119	99	45	41,3	cyclictest	1702649	-21	kworker/u16:0+flush-8:0	16:57:15	5
1608119	99	45	41,3	cyclictest	1702649	-21	kworker/u16:0+flush-8:0	16:57:15	5
1608128	99	42	0,40	cyclictest	1874293	-21	latency_hist	17:32:15	7
1608120	99	42	40,2	cyclictest	2178095	-21	kworker/u16:1+events_unbound	20:44:46	6
1608112	99	42	39,2	cyclictest	2095830	-21	kworker/u16:0+flush-8:0	19:27:15	4
1608120	99	41	39,2	cyclictest	2015778	-21	kworker/u16:3+events_unbound	19:20:26	6
1608128	99	40	35,4	cyclictest	1702830	-21	latency_hist	16:07:15	7
1608120	99	40	38,2	cyclictest	2196815	-21	kworker/u16:0+events_unbound	20:35:46	6
1608120	99	40	38,2	cyclictest	1702799	-21	kworker/u16:4+flush-8:0	19:09:46	6
1608120	99	40	38,2	cyclictest	1702799	-21	kworker/u16:4+flush-8:0	19:09:46	6
1608119	99	40	38,2	cyclictest	2196815	-21	kworker/u16:0+events_unbound	20:36:45	5
1608119	99	40	37,3	cyclictest	2223216	-21	kworker/u16:2+flush-8:0	20:27:41	5
1598201	2	40	3,31	sleep7	0	-21	swapper/7	15:17:26	7
1608120	99	39	37,2	cyclictest	2178095	-21	kworker/u16:1+flush-8:0	20:37:50	6
1608120	99	39	37,2	cyclictest	2178095	-21	kworker/u16:1+flush-8:0	20:37:50	6
1608120	99	39	37,2	cyclictest	1929364	-21	kworker/u16:2+flush-8:0	18:08:03	6
1608120	99	39	37,2	cyclictest	1602630	-21	kworker/u16:0+flush-8:0	15:42:39	6
1608119	99	39	37,2	cyclictest	1702649	-21	kworker/u16:0+flush-8:0	16:07:42	5
1608119	99	39	37,2	cyclictest	1702649	-21	kworker/u16:0+flush-8:0	16:07:42	5
1608119	99	39	37,2	cyclictest	1557045	-21	kworker/u16:3+flush-8:0	15:22:45	5
1608119	99	39	37,2	cyclictest	1557045	-21	kworker/u16:3+flush-8:0	15:22:45	5
1608120	99	38	36,2	cyclictest	2186723	-21	kworker/u16:3+events_unbound	20:10:26	6
1608120	99	38	36,2	cyclictest	1602630	-21	kworker/u16:0+events_unbound	15:42:16	6
1608119	99	38	36,2	cyclictest	1631907	-21	kworker/u16:1+flush-8:0	15:42:46	5
1608120	99	37	35,2	cyclictest	2249164	-21	kworker/u16:2+events_unbound	20:48:25	6
1608120	99	37	35,2	cyclictest	2096251	-21	kworker/u16:1+flush-8:0	19:32:44	6
1608120	99	37	35,2	cyclictest	1702799	-21	kworker/u16:4+flush-8:0	19:37:57	6
1608119	99	37	35,2	cyclictest	1929364	-21	kworker/u16:2+events_unbound	18:23:44	5
1608119	99	37	35,2	cyclictest	1929364	-21	kworker/u16:2+events_unbound	18:23:44	5
1608120	99	36	34,2	cyclictest	1904215	-21	kworker/u16:0+events_unbound	18:44:46	6
1608120	99	36	34,2	cyclictest	1702649	-21	kworker/u16:0+flush-8:0	16:25:46	6
1608119	99	36	34,2	cyclictest	1929364	-21	kworker/u16:2+events_unbound	18:44:44	5
1608119	99	36	34,2	cyclictest	1642057	-21	kworker/u16:3+events_unbound	15:54:27	5
1608128	99	35	30,4	cyclictest	1823812	-21	latency_hist	17:07:16	7
1608120	99	35	33,2	cyclictest	2166769	-21	kworker/u16:2+flush-8:0	20:02:15	6
1608120	99	35	33,2	cyclictest	2096252	-21	kworker/u16:5+events_unbound	19:27:52	6
1608120	99	35	33,2	cyclictest	1702649	-21	kworker/u16:0+events_unbound	16:07:43	6
1608120	99	35	33,2	cyclictest	1702649	-21	kworker/u16:0+events_unbound	16:07:43	6
1608120	99	35	33,2	cyclictest	1607829	-21	kworker/u16:2+flush-8:0	16:12:41	6
1608119	99	35	33,2	cyclictest	2035811	-21	kworker/u16:1+flush-8:0	18:54:14	5
1608119	99	35	33,2	cyclictest	1904215	-21	kworker/u16:0+events_unbound	18:12:14	5
1608119	99	35	32,2	cyclictest	1702799	-21	kworker/u16:4+events_unbound	17:07:19	5
1608120	99	34	32,2	cyclictest	2207085	-21	kworker/u16:4+events_unbound	20:16:49	6
1608120	99	34	32,2	cyclictest	1965133	-21	kworker/u16:1+events_unbound	18:26:44	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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