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 Mon Jul 13, 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
1961522	2	59	49,7	sleep5	0	-21	swapper/5	19:06:20	5
1961463	2	57	23,29	sleep7	0	-21	swapper/7	19:05:33	7
1962058	99	49	42,6	cyclictest	648	-21	systemd-journal	00:39:34	7
1961750	2	48	18,7	sleep4	0	-21	swapper/4	19:09:31	4
1962054	99	40	37,2	cyclictest	2189499	-21	kworker/u16:3+flush-8:0	23:39:35	6
1962048	99	39	37,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	22:58:22	4
1962048	99	39	36,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	00:19:36	4
1962058	99	38	0,36	cyclictest	2308797	-21	latency_hist	21:54:35	7
1962048	99	37	35,2	cyclictest	2674489	-21	kworker/u16:2+events_unbound	00:30:05	4
1962048	99	37	35,2	cyclictest	2528035	-21	kworker/u16:0+events_unbound	23:51:02	4
1962048	99	37	35,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	22:21:02	4
1962048	99	37	35,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:23:50	4
1962048	99	37	35,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:23:50	4
1962048	99	36	34,2	cyclictest	2528035	-21	kworker/u16:0+events_unbound	23:31:14	4
1962048	99	36	34,2	cyclictest	2528035	-21	kworker/u16:0+events_unbound	00:18:53	4
1962048	99	36	34,2	cyclictest	2503722	-21	kworker/u16:2+events_unbound	23:16:50	4
1962048	99	36	34,2	cyclictest	2331066	-21	kworker/u16:2+events_unbound	22:43:42	4
1962048	99	36	34,2	cyclictest	2331066	-21	kworker/u16:2+events_unbound	22:11:10	4
1962048	99	36	34,2	cyclictest	2279575	-21	kworker/u16:1+events_unbound	22:02:59	4
1962048	99	36	34,2	cyclictest	2279575	-21	kworker/u16:1+events_unbound	22:02:59	4
1962048	99	36	34,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	23:21:33	4
1962048	99	36	34,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	23:02:01	4
1962048	99	36	34,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	22:48:02	4
1962048	99	36	34,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	22:38:26	4
1962048	99	36	34,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:38:10	4
1962048	99	36	34,2	cyclictest	2140821	-21	kworker/u16:1+events_unbound	21:14:10	4
1962048	99	36	34,2	cyclictest	2062548	-21	kworker/u16:4+events_unbound	21:15:59	4
1962048	99	35	33,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	23:39:14	4
1962048	99	35	33,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	23:12:42	4
1962048	99	35	33,2	cyclictest	2279575	-21	kworker/u16:1+events_unbound	21:55:51	4
1962048	99	35	33,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	23:58:53	4
1962048	99	35	33,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:46:50	4
1962048	99	35	33,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	00:11:29	4
1962048	99	35	33,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	00:07:13	4
1962048	99	35	33,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	00:07:13	4
1962048	99	34	32,2	cyclictest	2528035	-21	kworker/u16:0+events_unbound	23:46:01	4
1962048	99	34	32,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	23:40:13	4
1962048	99	34	32,2	cyclictest	2331066	-21	kworker/u16:2+events_unbound	22:32:05	4
1962048	99	34	32,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:52:09	4
1962048	99	34	32,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:25:54	4
1961732	2	34	24,7	sleep6	0	-21	swapper/6	19:09:17	6
1962058	99	33	27,5	cyclictest	2131077	-21	latency_hist	20:34:35	7
1962048	99	33	31,2	cyclictest	2279575	-21	kworker/u16:1+events_unbound	22:05:30	4
1962048	99	32	31,1	cyclictest	2345805	-21	kworker/u16:0+events_unbound	22:25:42	4
1962048	99	32	30,2	cyclictest	2528035	-21	kworker/u16:0+events_unbound	00:26:42	4
1962048	99	32	30,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	23:06:21	4
1962048	99	32	30,2	cyclictest	2331066	-21	kworker/u16:2+events_unbound	22:15:10	4
1962048	99	32	30,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	22:52:10	4
1962048	99	32	30,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	21:33:41	4
1962048	99	32	30,2	cyclictest	2189499	-21	kworker/u16:3+events_unbound	00:02:10	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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