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 Sun Feb 22, 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
2281577	2	98	0,1	sleep7	2281579	-21	sed	23:40:38	7
1666129	99	58	56,2	cyclictest	2092332	-21	kworker/u16:3+flush-8:0	23:35:42	4
1665754	2	57	47,7	sleep6	0	-21	swapper/6	19:03:52	6
1666133	99	55	53,2	cyclictest	2007903	-21	kworker/u16:2+events_unbound	21:55:42	5
1666129	99	54	52,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:30:45	4
1666133	99	52	49,2	cyclictest	2164446	-21	kworker/u16:1+events_unbound	23:50:27	5
1666133	99	50	48,2	cyclictest	1813548	-21	kworker/u16:0+flush-8:0	23:10:27	5
1666129	99	50	47,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:25:26	4
1666129	99	50	47,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:05:26	4
1666133	99	49	47,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	21:40:39	5
1666133	99	49	47,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	21:40:39	5
1666129	99	49	47,2	cyclictest	2390946	-21	kworker/u16:0+events_unbound	00:30:41	4
1666129	99	47	45,2	cyclictest	1959372	-21	kworker/u16:3+events_unbound	21:35:29	4
1666129	99	47	45,2	cyclictest	1698832	-21	kworker/u16:1+events_unbound	19:45:37	4
1665770	2	47	37,7	sleep4	0	-21	swapper/4	19:04:06	4
1666143	99	45	42,2	cyclictest	2185402	-21	sh	23:00:39	7
1666133	99	45	43,2	cyclictest	1813548	-21	kworker/u16:0+flush-8:0	21:25:27	5
1666129	99	45	43,2	cyclictest	2164446	-21	kworker/u16:1+flush-8:0	23:20:27	4
1666129	99	44	42,2	cyclictest	1959372	-21	kworker/u16:3+events_unbound	21:45:40	4
1666133	99	43	41,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:26:21	5
1666133	99	43	41,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:55:42	5
1666133	99	43	40,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:50:39	5
1665733	2	43	33,7	sleep5	0	-21	swapper/5	19:03:35	5
1666133	99	42	40,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:28:09	5
1666133	99	42	40,2	cyclictest	2007903	-21	kworker/u16:2+events_unbound	22:08:38	5
1666138	99	41	39,2	cyclictest	2164446	-21	kworker/u16:1+events_unbound	23:30:41	6
1666138	99	41	39,2	cyclictest	1959372	-21	kworker/u16:3+flush-8:0	21:45:27	6
1666133	99	41	39,2	cyclictest	2403938	-21	kworker/u16:5+events_unbound	00:34:41	5
1666133	99	41	39,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	23:01:18	5
1666133	99	41	39,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:17:39	5
1666129	99	41	39,2	cyclictest	2308921	-21	kworker/u16:5+events_unbound	23:55:34	4
1666143	99	40	35,4	cyclictest	2079825	-21	latency_hist	22:20:12	7
1666129	99	40	38,2	cyclictest	2164446	-21	kworker/u16:1+flush-8:0	23:45:46	4
1666129	99	40	38,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:29:42	4
1666129	99	40	37,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	23:15:26	4
1666133	99	39	37,2	cyclictest	2307870	-21	kworker/u16:3+events_unbound	23:55:14	5
1666133	99	39	37,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:04:10	5
1666133	99	39	37,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:40:39	5
1666133	99	39	37,2	cyclictest	1813548	-21	kworker/u16:0+flush-8:0	21:30:42	5
1666129	99	39	37,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	23:42:22	4
1666129	99	39	37,2	cyclictest	2164446	-21	kworker/u16:1+events_unbound	23:50:29	4
1665657	2	39	4,31	sleep7	0	-21	swapper/7	19:02:32	7
1666133	99	38	36,2	cyclictest	2294451	-21	kworker/u16:0+events_unbound	23:48:26	5
1666133	99	38	36,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:31:55	5
1666133	99	38	36,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:35:40	5
1666133	99	38	36,2	cyclictest	1981180	-21	kworker/u16:1+events_unbound	21:53:33	5
1666133	99	38	36,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	23:08:26	5
1666133	99	38	36,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	23:08:26	5
1666133	99	38	36,2	cyclictest	1776491	-21	kworker/u16:4+events_unbound	20:40:43	5
1666129	99	38	36,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:03:41	4
1666129	99	38	36,2	cyclictest	1813548	-21	kworker/u16:0+flush-8:0	21:25:31	4
1666133	99	37	35,2	cyclictest	2353892	-21	kworker/u16:3+events_unbound	00:18:22	5
1666133	99	37	35,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	23:22:21	5
1666133	99	37	35,2	cyclictest	2164446	-21	kworker/u16:1+events_unbound	23:38:30	5
1666133	99	37	34,2	cyclictest	2164446	-21	kworker/u16:1+flush-8:0	23:15:27	5
1666133	99	37	34,2	cyclictest	1944992	-21	kworker/u16:2+events_unbound	21:35:21	5
1666129	99	37	35,2	cyclictest	2353892	-21	kworker/u16:3+events_unbound	00:15:26	4
1666129	99	37	35,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:50:10	4
1666129	99	37	35,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	21:33:27	4
1666129	99	37	35,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	21:11:26	4
1666129	99	37	35,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	21:09:11	4
1666143	99	36	0,34	cyclictest	1675548	-21	latency_hist	19:10:13	7
1666133	99	36	34,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	23:32:13	5
1666133	99	36	34,2	cyclictest	2164446	-21	kworker/u16:1+events_unbound	23:29:38	5
1666133	99	36	34,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	23:43:29	5
1666129	99	36	34,2	cyclictest	2353892	-21	kworker/u16:3+events_unbound	00:13:33	4
1666129	99	36	34,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	23:32:42	4
1666129	99	36	34,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:24:49	4
1666129	99	36	34,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	23:13:25	4
1666129	99	36	34,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:55:44	4
1666129	99	36	34,2	cyclictest	2029497	-21	kworker/u16:5+flush-8:0	22:35:44	4
1666129	99	36	34,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:51:53	4
1666129	99	36	34,2	cyclictest	2007903	-21	kworker/u16:2+events_unbound	21:53:57	4
1666129	99	36	34,2	cyclictest	1981180	-21	kworker/u16:1+events_unbound	21:40:35	4
1666129	99	36	34,2	cyclictest	1981180	-21	kworker/u16:1+events_unbound	21:40:35	4
1666129	99	36	34,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	23:07:53	4
1666129	99	36	34,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	23:07:53	4
1666129	99	36	34,2	cyclictest	1813548	-21	kworker/u16:0+events_unbound	22:01:22	4
1666133	99	35	32,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	22:20:14	5
1666129	99	35	33,2	cyclictest	2164446	-21	kworker/u16:1+events_unbound	23:27:41	4
1666129	99	35	33,2	cyclictest	2007903	-21	kworker/u16:2+flush-8:0	21:55:27	4
1666129	99	35	33,2	cyclictest	2007903	-21	kworker/u16:2+events_unbound	22:11:38	4
1666129	99	35	33,2	cyclictest	2007903	-21	kworker/u16:2+events_unbound	22:08:17	4
1666133	99	34	32,2	cyclictest	1813548	-21	kworker/u16:0+flush-8:0	22:00:53	5
1666133	99	34	32,2	cyclictest	1756012	-21	kworker/u16:3+events_unbound	21:19:33	5
1666129	99	34	32,2	cyclictest	2029497	-21	kworker/u16:5+events_unbound	23:03:33	4
1666129	99	34	32,2	cyclictest	2007903	-21	kworker/u16:2+events_unbound	22:15:21	4
1666129	99	34	32,2	cyclictest	1880044	-21	kworker/u16:1+events_unbound	21:21:58	4
1666129	99	34	32,2	cyclictest	1880044	-21	kworker/u16:1+events_unbound	21:17:22	4
1666143	99	33	32,0	cyclictest	0	-21	swapper/7	22:39:31	7
1666133	99	33	31,2	cyclictest	2353892	-21	kworker/u16:3+events_unbound	00:11:55	5
1666133	99	33	31,2	cyclictest	2330066	-21	kworker/u16:4+events_unbound	00:23:07	5
1666133	99	33	31,2	cyclictest	1880044	-21	kworker/u16:1+events_unbound	21:13:06	5
1666129	99	33	31,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:42:13	4
1666129	99	33	30,2	cyclictest	1756012	-21	kworker/u16:3+events_unbound	21:00:14	4
1666129	99	33	30,2	cyclictest	1756012	-21	kworker/u16:3+events_unbound	21:00:14	4
1666143	99	32	27,4	cyclictest	650	-21	systemd-journal	00:00:11	7
1666143	99	32	27,4	cyclictest	2393281	-21	latency_hist	00:30:11	7
1666133	99	32	30,2	cyclictest	2234409	-21	kworker/u16:2+events_unbound	00:07:08	5
1666133	99	32	30,2	cyclictest	2092332	-21	kworker/u16:3+events_unbound	22:47:26	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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