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 100 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
1962048	99	32	29,2	cyclictest	1888092	-21	kworker/u16:3+events_unbound	19:59:37	4
1962058	99	31	25,5	cyclictest	2381959	-21	latency_hist	22:24:35	7
1962048	99	31	29,2	cyclictest	2674489	-21	kworker/u16:2+events_unbound	00:36:53	4
1962048	99	31	29,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	23:25:49	4
1962048	99	31	29,2	cyclictest	2439583	-21	kworker/u16:5+events_unbound	23:25:49	4
1962048	99	31	29,2	cyclictest	2279575	-21	kworker/u16:1+events_unbound	21:40:33	4
1962048	99	31	28,2	cyclictest	2014551	-21	kworker/u16:4+events_unbound	19:34:38	4
1962048	99	30	28,2	cyclictest	2062548	-21	kworker/u16:4+events_unbound	20:47:10	4
1962058	99	27	24,2	cyclictest	2601348	-21	ssh	23:54:37	7
1962058	99	27	22,4	cyclictest	2406206	-21	latency_hist	22:34:34	7
1962048	99	27	25,2	cyclictest	2043860	-21	kworker/u16:0+events_unbound	19:50:06	4
1962048	99	27	25,2	cyclictest	2043860	-21	kworker/u16:0+events_unbound	19:50:06	4
1962048	99	26	23,2	cyclictest	1695752	-21	kworker/u16:2+events_unbound	20:19:46	4
1962058	99	25	20,4	cyclictest	648	-21	systemd-journal	21:19:29	7
1962058	99	25	0,23	cyclictest	2674067	-21	latency_hist	00:24:35	7
1962054	99	25	23,2	cyclictest	2140821	-21	kworker/u16:1+flush-8:0	21:19:35	6
1962052	99	25	24,1	cyclictest	2528035	-21	kworker/u16:0+events_unbound	00:01:45	5
1962048	99	25	23,2	cyclictest	1961802	-21	kworker/u16:0+events_unbound	19:12:35	4
2659610	2	24	0,1	chrt	2659608	-21	ssh	00:15:20	7
1962048	99	24	22,2	cyclictest	2140821	-21	kworker/u16:1+events_unbound	20:50:45	4
1962048	99	24	22,2	cyclictest	2043860	-21	kworker/u16:0+events_unbound	20:32:46	4
1962048	99	24	21,2	cyclictest	2083526	-21	kworker/u16:3+events_unbound	20:39:38	4
1962048	99	23	21,2	cyclictest	1932760	-21	kworker/u16:1+events_unbound	19:45:46	4
1962048	99	23	20,2	cyclictest	2083526	-21	kworker/u16:3+events_unbound	20:34:43	4
1962058	99	22	21,0	cyclictest	0	-21	swapper/7	23:09:30	7
1962058	99	22	21,0	cyclictest	0	-21	swapper/7	22:11:45	7
1962058	99	22	17,4	cyclictest	2235718	-21	latency_hist	21:24:35	7
1962058	99	22	17,4	cyclictest	2235718	-21	latency_hist	21:24:35	7
1962054	99	22	20,2	cyclictest	2439583	-21	kworker/u16:5+flush-8:0	00:00:06	6
1962048	99	22	20,2	cyclictest	2140821	-21	kworker/u16:1+events_unbound	20:54:57	4
1962048	99	22	19,2	cyclictest	1932760	-21	kworker/u16:1+events_unbound	19:19:37	4
1962058	99	21	20,0	cyclictest	0	-21	swapper/7	19:09:41	7
1962048	99	21	19,2	cyclictest	1888092	-21	kworker/u16:3+events_unbound	19:54:53	4
1962048	99	21	19,2	cyclictest	1695752	-21	kworker/u16:2+events_unbound	20:07:10	4
1962054	99	20	16,3	cyclictest	2236139	-21	kworker/u16:2+flush-8:0	21:24:52	6
1962048	99	20	18,2	cyclictest	2062548	-21	kworker/u16:4+events_unbound	20:18:46	4
1962048	99	20	18,2	cyclictest	1888092	-21	kworker/u16:3+events_unbound	19:15:46	4
1962048	99	20	17,2	cyclictest	1932760	-21	kworker/u16:1+events_unbound	19:39:48	4
1962058	99	19	18,0	cyclictest	0	-21	swapper/7	20:14:30	7
1962058	99	18	17,0	cyclictest	0	-21	swapper/7	22:27:58	7
1962058	99	18	16,1	cyclictest	0	-21	swapper/7	23:19:22	7
1962058	99	18	16,1	cyclictest	0	-21	swapper/7	23:03:50	7
1962058	99	17	16,0	cyclictest	0	-21	swapper/7	21:26:13	7
1962058	99	17	16,0	cyclictest	0	-21	swapper/7	00:32:18	7
1962058	99	17	15,1	cyclictest	0	-21	swapper/7	22:48:06	7
1962048	99	17	15,2	cyclictest	2083526	-21	kworker/u16:3+events_unbound	20:25:05	4
1962058	99	16	15,0	cyclictest	0	-21	swapper/7	23:43:17	7
1962058	99	16	15,0	cyclictest	0	-21	swapper/7	23:09:38	7
1962058	99	16	15,0	cyclictest	0	-21	swapper/7	22:15:46	7
1962058	99	16	15,0	cyclictest	0	-21	swapper/7	21:59:34	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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