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 Fri Mar 13, 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
1209999	2	59	48,8	sleep4	0	-21	swapper/4	19:00:12	4
1210011	2	58	48,7	sleep5	0	-21	swapper/5	19:00:21	5
1210238	2	50	40,7	sleep6	0	-21	swapper/6	19:03:35	6
1210542	99	44	42,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	21:32:03	5
1210542	99	42	40,2	cyclictest	1753092	-21	kworker/u16:2+events_unbound	23:41:26	5
1210542	99	42	40,2	cyclictest	1539264	-21	kworker/u16:2+events_unbound	22:22:58	5
1210548	99	40	0,38	cyclictest	1801004	-21	latency_hist	23:33:56	7
1210542	99	40	38,2	cyclictest	1517252	-21	kworker/u16:1+events_unbound	22:31:42	5
1210547	99	39	37,2	cyclictest	1848978	-21	kworker/u16:5+events_unbound	00:16:29	6
1210542	99	39	37,2	cyclictest	1848978	-21	kworker/u16:5+events_unbound	00:13:33	5
1210542	99	39	36,2	cyclictest	1738366	-21	kworker/u16:0+events_unbound	23:25:26	5
1210542	99	39	36,2	cyclictest	1262098	-21	kworker/u16:2+events_unbound	21:24:05	5
1210542	99	39	35,3	cyclictest	1394655	-21	kworker/u16:3+flush-8:0	21:19:01	5
1210539	99	39	37,2	cyclictest	1738366	-21	kworker/u16:0+flush-8:0	23:33:56	4
1210049	2	39	5,30	sleep7	0	-21	swapper/7	19:00:55	7
1210547	99	38	36,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	21:48:50	6
1210542	99	38	36,2	cyclictest	1778863	-21	kworker/u16:1+events_unbound	00:00:21	5
1210547	99	37	35,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	23:19:38	6
1210542	99	37	35,2	cyclictest	1753092	-21	kworker/u16:2+events_unbound	23:35:09	5
1210542	99	37	35,2	cyclictest	1694275	-21	kworker/u16:1+events_unbound	23:08:26	5
1210542	99	37	35,2	cyclictest	1658449	-21	kworker/u16:3+events_unbound	23:00:49	5
1210542	99	37	35,2	cyclictest	1658449	-21	kworker/u16:3+events_unbound	22:46:21	5
1210542	99	37	35,2	cyclictest	1539264	-21	kworker/u16:2+events_unbound	22:25:54	5
1210542	99	37	35,2	cyclictest	1517252	-21	kworker/u16:1+events_unbound	21:41:50	5
1210542	99	37	35,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	23:15:13	5
1210542	99	37	35,2	cyclictest	1262098	-21	kworker/u16:2+events_unbound	21:15:11	5
1210542	99	36	34,2	cyclictest	1848978	-21	kworker/u16:5+events_unbound	00:27:53	5
1210542	99	36	34,2	cyclictest	1694275	-21	kworker/u16:1+events_unbound	23:12:46	5
1210542	99	36	34,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	21:46:27	5
1210542	99	36	34,2	cyclictest	1262098	-21	kworker/u16:2+events_unbound	21:04:59	5
1210542	99	36	34,2	cyclictest	1262098	-21	kworker/u16:2+events_unbound	21:04:59	5
1210542	99	36	33,2	cyclictest	1848978	-21	kworker/u16:5+events_unbound	00:19:09	5
1210542	99	35	33,2	cyclictest	1738366	-21	kworker/u16:0+events_unbound	23:32:05	5
1514852	2	34	0,0	sleep7	1514853	-21	sh	21:33:35	7
1210547	99	34	32,2	cyclictest	1738366	-21	kworker/u16:0+events_unbound	23:07:45	6
1210547	99	34	32,2	cyclictest	1539264	-21	kworker/u16:2+events_unbound	22:09:33	6
1210542	99	34	32,2	cyclictest	1846322	-21	kworker/u16:3+events_unbound	23:51:08	5
1210542	99	34	32,2	cyclictest	1846322	-21	kworker/u16:3+events_unbound	23:51:08	5
1210542	99	34	32,2	cyclictest	1753092	-21	kworker/u16:2+events_unbound	23:57:53	5
1210542	99	34	32,2	cyclictest	1753092	-21	kworker/u16:2+events_unbound	23:23:27	5
1210542	99	34	32,2	cyclictest	1658404	-21	kworker/u16:0+events_unbound	22:42:13	5
1210542	99	34	32,2	cyclictest	1517252	-21	kworker/u16:1+events_unbound	21:52:17	5
1210542	99	34	32,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	22:16:51	5
1210542	99	34	32,2	cyclictest	1488844	-21	kworker/u16:5+events_unbound	21:36:53	5
1210547	99	33	31,2	cyclictest	1517252	-21	kworker/u16:1+events_unbound	22:23:37	6
1210542	99	33	31,2	cyclictest	1778863	-21	kworker/u16:1+events_unbound	23:47:53	5
1210542	99	33	31,2	cyclictest	1658449	-21	kworker/u16:3+events_unbound	22:49:42	5
1210542	99	33	31,2	cyclictest	1517252	-21	kworker/u16:1+events_unbound	22:08:15	5
1210539	99	33	30,2	cyclictest	1738366	-21	kworker/u16:0+flush-8:0	23:23:56	4
1210547	99	32	30,2	cyclictest	1488844	-21	kworker/u16:5+flush-8:0	21:29:35	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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