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 Sat Mar 07, 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
1982937	2	100	0,0	sleep4	0	-21	swapper/4	21:20:01	4
1704246	99	54	0,52	cyclictest	2238396	-21	latency_hist	23:09:20	7
1703685	2	52	42,7	sleep5	0	-21	swapper/5	19:00:29	5
1694858	2	50	39,7	sleep4	0	-21	swapper/4	18:59:23	4
1704240	99	48	44,3	cyclictest	1918165	-21	kworker/u16:4+flush-8:0	20:54:46	5
1704238	99	41	39,2	cyclictest	2346776	-21	kworker/u16:2+events_unbound	00:08:34	4
1704238	99	41	39,2	cyclictest	2153268	-21	kworker/u16:2+events_unbound	22:34:22	4
1704238	99	40	38,2	cyclictest	2298968	-21	kworker/u16:3+events_unbound	23:48:26	4
1704238	99	40	38,2	cyclictest	1938870	-21	kworker/u16:2+flush-8:0	21:44:44	4
1704238	99	39	37,2	cyclictest	2176002	-21	kworker/u16:0+events_unbound	23:57:02	4
1704238	99	39	37,2	cyclictest	2067552	-21	kworker/u16:5+events_unbound	22:12:03	4
1703687	2	39	3,31	sleep7	0	-21	swapper/7	19:00:31	7
1704238	99	38	36,2	cyclictest	2347158	-21	kworker/u16:4+events_unbound	00:15:46	4
1704238	99	38	36,2	cyclictest	2176002	-21	kworker/u16:0+events_unbound	23:21:34	4
1704238	99	38	36,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	22:25:03	4
1704238	99	38	36,2	cyclictest	2019131	-21	kworker/u16:0+events_unbound	21:39:02	4
1704238	99	37	35,2	cyclictest	2323271	-21	kworker/u16:1+events_unbound	00:21:26	4
1704238	99	37	35,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	22:33:02	4
1704238	99	37	35,2	cyclictest	2067552	-21	kworker/u16:5+events_unbound	22:19:02	4
1704238	99	37	35,2	cyclictest	2045684	-21	kworker/u16:3+events_unbound	22:07:59	4
1704238	99	36	34,2	cyclictest	2382829	-21	kworker/u16:3+flush-8:0	00:29:49	4
1704238	99	36	34,2	cyclictest	2189273	-21	kworker/u16:2+events_unbound	23:25:58	4
1704238	99	36	34,2	cyclictest	2176002	-21	kworker/u16:0+events_unbound	23:31:10	4
1704238	99	36	34,2	cyclictest	2176002	-21	kworker/u16:0+events_unbound	23:12:13	4
1704238	99	36	34,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	23:06:54	4
1704238	99	36	34,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	22:42:21	4
1704238	99	36	34,2	cyclictest	2019131	-21	kworker/u16:0+events_unbound	22:23:53	4
1704238	99	36	34,2	cyclictest	2019131	-21	kworker/u16:0+events_unbound	22:23:53	4
1704238	99	36	34,2	cyclictest	1918165	-21	kworker/u16:4+events_unbound	21:12:23	4
1704238	99	36	33,2	cyclictest	2298968	-21	kworker/u16:3+events_unbound	23:49:21	4
1704238	99	36	33,2	cyclictest	2045684	-21	kworker/u16:3+events_unbound	21:54:22	4
1704238	99	35	33,2	cyclictest	2382829	-21	kworker/u16:3+events_unbound	00:26:58	4
1704238	99	35	33,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	23:18:30	4
1704238	99	35	33,2	cyclictest	2067552	-21	kworker/u16:5+events_unbound	22:02:07	4
1704238	99	35	33,2	cyclictest	1938870	-21	kworker/u16:2+events_unbound	21:44:09	4
1704238	99	35	33,2	cyclictest	1938870	-21	kworker/u16:2+events_unbound	21:44:09	4
1704238	99	35	33,2	cyclictest	1918165	-21	kworker/u16:4+events_unbound	21:51:58	4
1704238	99	35	33,2	cyclictest	1918165	-21	kworker/u16:4+events_unbound	21:09:10	4
1704238	99	35	33,2	cyclictest	1812718	-21	kworker/u16:1+events_unbound	21:18:38	4
1704238	99	34	32,2	cyclictest	2323271	-21	kworker/u16:1+events_unbound	00:13:41	4
1704238	99	34	32,2	cyclictest	2189273	-21	kworker/u16:2+events_unbound	23:42:25	4
1704238	99	34	32,2	cyclictest	2189273	-21	kworker/u16:2+events_unbound	23:42:25	4
1704238	99	34	32,2	cyclictest	2176002	-21	kworker/u16:0+events_unbound	23:35:50	4
1704238	99	34	32,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	22:59:29	4
1704238	99	34	32,2	cyclictest	2127458	-21	kworker/u16:1+events_unbound	22:59:29	4
1704238	99	34	32,2	cyclictest	1985395	-21	kworker/u16:3+events_unbound	21:30:22	4
1704243	99	33	31,2	cyclictest	2176002	-21	kworker/u16:0+flush-8:0	23:04:19	6
1704243	99	33	31,2	cyclictest	2176002	-21	kworker/u16:0+flush-8:0	23:04:19	6
1704243	99	33	31,2	cyclictest	2067552	-21	kworker/u16:5+flush-8:0	22:14:38	6
1704240	99	33	31,2	cyclictest	2298968	-21	kworker/u16:3+events_unbound	23:49:33	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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