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 Tue Apr 21, 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
1635345	2	94	0,1	sleep5	0	-21	swapper/5	20:19:56	5
1492695	2	94	0,0	sleep5	0	-21	swapper/5	19:09:53	5
1490393	2	58	48,7	sleep4	0	-21	swapper/4	19:08:09	4
1490335	2	50	25,7	sleep5	0	-21	swapper/5	19:07:22	5
1481878	2	44	6,32	sleep7	0	-21	swapper/7	19:04:51	7
1490801	99	38	35,2	cyclictest	2051408	-21	kworker/u16:3+events_unbound	23:26:01	5
1490805	99	35	33,2	cyclictest	1580868	-21	kworker/u16:3+events_unbound	20:09:36	6
1490805	99	34	32,2	cyclictest	2015460	-21	kworker/u16:1+flush-8:0	23:27:49	6
1490801	99	34	32,2	cyclictest	1989149	-21	kworker/u16:2+flush-8:0	23:06:29	5
1490801	99	34	32,2	cyclictest	1989149	-21	kworker/u16:2+events_unbound	23:43:14	5
1490801	99	34	32,2	cyclictest	1878855	-21	kworker/u16:0+events_unbound	23:13:22	5
1490801	99	34	32,2	cyclictest	1724657	-21	kworker/u16:2+events_unbound	21:17:11	5
1490801	99	34	31,2	cyclictest	2051408	-21	kworker/u16:3+events_unbound	23:49:39	5
1490805	99	33	31,2	cyclictest	2100208	-21	kworker/u16:1+events_unbound	00:18:45	6
1490805	99	33	31,2	cyclictest	1866582	-21	kworker/u16:1+events_unbound	22:19:38	6
1490805	99	33	31,2	cyclictest	1784540	-21	kworker/u16:0+events_unbound	21:50:46	6
1490805	99	33	31,2	cyclictest	1784540	-21	kworker/u16:0+events_unbound	21:50:46	6
1490801	99	33	31,2	cyclictest	2073133	-21	kworker/u16:0+events_unbound	23:47:21	5
1490801	99	33	31,2	cyclictest	1989149	-21	kworker/u16:2+flush-8:0	00:24:45	5
1490801	99	33	31,2	cyclictest	1878855	-21	kworker/u16:0+events_unbound	22:22:30	5
1490801	99	32	30,2	cyclictest	2100208	-21	kworker/u16:1+events_unbound	00:13:42	5
1490801	99	32	30,2	cyclictest	1989149	-21	kworker/u16:2+flush-8:0	23:36:42	5
1490801	99	32	30,2	cyclictest	1989149	-21	kworker/u16:2+flush-8:0	23:32:46	5
1490801	99	32	30,2	cyclictest	1989149	-21	kworker/u16:2+events_unbound	00:19:06	5
1490801	99	32	30,2	cyclictest	1878855	-21	kworker/u16:0+events_unbound	23:18:41	5
1490801	99	32	30,2	cyclictest	1878855	-21	kworker/u16:0+events_unbound	23:18:41	5
1490801	99	32	30,2	cyclictest	1878855	-21	kworker/u16:0+events_unbound	22:36:26	5
1490801	99	32	30,2	cyclictest	1866582	-21	kworker/u16:1+flush-8:0	22:31:10	5
1490801	99	32	30,2	cyclictest	1733716	-21	kworker/u16:4+events_unbound	21:57:41	5
1490801	99	32	30,2	cyclictest	1695369	-21	kworker/u16:3+events_unbound	22:18:10	5
1490805	99	31	29,2	cyclictest	1695369	-21	kworker/u16:3+flush-8:0	21:29:35	6
1490801	99	31	29,2	cyclictest	2073133	-21	kworker/u16:0+events_unbound	00:03:55	5
1490801	99	31	29,2	cyclictest	1989149	-21	kworker/u16:2+flush-8:0	22:59:09	5
1490801	99	31	29,2	cyclictest	1906053	-21	kworker/u16:4+events_unbound	22:29:26	5
1490801	99	31	29,2	cyclictest	1878855	-21	kworker/u16:0+events_unbound	23:03:38	5
1490801	99	31	29,2	cyclictest	1845635	-21	kworker/u16:0+events_unbound	22:01:57	5
1490801	99	31	29,2	cyclictest	1757895	-21	kworker/u16:1+events_unbound	21:27:02	5
1490801	99	31	29,2	cyclictest	1628388	-21	kworker/u16:0+events_unbound	20:57:53	5
1490801	99	31	28,2	cyclictest	2073133	-21	kworker/u16:0+flush-8:0	00:04:37	5
1490796	99	31	28,2	cyclictest	1866582	-21	kworker/u16:1+flush-8:0	22:14:35	4
1490451	2	31	20,8	sleep6	0	-21	swapper/6	19:08:59	6
1490805	99	30	28,2	cyclictest	1906053	-21	kworker/u16:4+events_unbound	22:35:30	6
1490805	99	30	27,2	cyclictest	1695369	-21	kworker/u16:3+events_unbound	21:14:57	6
1490801	99	30	28,2	cyclictest	1989149	-21	kworker/u16:2+events_unbound	23:58:25	5
1490801	99	30	28,2	cyclictest	1989149	-21	kworker/u16:2+events_unbound	00:24:13	5
1490801	99	30	28,2	cyclictest	1866582	-21	kworker/u16:1+events_unbound	22:06:09	5
1490801	99	30	28,2	cyclictest	1757895	-21	kworker/u16:1+events_unbound	21:21:14	5
1490801	99	30	28,2	cyclictest	1695369	-21	kworker/u16:3+flush-8:0	21:52:25	5
1490801	99	30	28,2	cyclictest	1695369	-21	kworker/u16:3+flush-8:0	21:52:25	5
1490805	99	29	27,2	cyclictest	1989149	-21	kworker/u16:2+events_unbound	23:17:29	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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