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 Wed Apr 29, 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
11781	2	148	0,1	sleep7	11779	-21	ssh	23:22:21	7
4158753	2	100	0,1	sleep5	0	-21	swapper/5	23:04:16	5
3645577	99	51	48,2	cyclictest	3735723	-21	ps	19:51:53	7
3645577	99	46	42,3	cyclictest	3754526	-21	ps	19:59:31	7
3645566	99	44	40,3	cyclictest	97777	-21	kworker/u16:2+flush-8:0	00:19:20	4
3645566	99	44	40,3	cyclictest	97777	-21	kworker/u16:2+flush-8:0	00:04:21	4
3645566	99	42	41,1	cyclictest	3870113	-21	kworker/u16:1+events_unbound	22:14:31	4
3645079	2	42	32,7	sleep5	0	-21	swapper/5	19:06:17	5
3645570	99	40	38,2	cyclictest	3697209	-21	kworker/u16:4+events_unbound	19:41:39	5
3645566	99	40	38,2	cyclictest	73321	-21	kworker/u16:4+events_unbound	00:29:20	4
3645566	99	40	37,2	cyclictest	3913766	-21	kworker/u16:2+flush-8:0	21:29:21	4
3645099	2	40	3,31	sleep7	0	-21	swapper/7	19:06:35	7
3645162	2	38	14,7	sleep4	0	-21	swapper/4	19:07:29	4
3645566	99	37	35,2	cyclictest	3913766	-21	kworker/u16:2+flush-8:0	21:39:33	4
3645572	99	36	34,1	cyclictest	3870113	-21	kworker/u16:1+flush-8:0	21:09:37	6
3645566	99	36	34,2	cyclictest	3870113	-21	kworker/u16:1+flush-8:0	22:19:29	4
3645577	99	34	29,4	cyclictest	61052	-21	latency_hist	23:44:03	7
3645566	99	31	28,2	cyclictest	21459	-21	kworker/u16:0+flush-8:0	23:39:22	4
3645566	99	27	24,3	cyclictest	4182061	-21	kworker/u16:2+flush-8:0	23:21:49	4
3645577	99	26	24,1	cyclictest	0	-21	swapper/7	19:14:22	7
3645566	99	26	24,2	cyclictest	4133719	-21	kworker/u16:3+flush-8:0	23:09:22	4
3645566	99	26	24,2	cyclictest	3859768	-21	kworker/u16:3+flush-8:0	21:14:04	4
3645566	99	26	24,2	cyclictest	21459	-21	kworker/u16:0+flush-8:0	23:57:09	4
3636126	2	26	16,7	sleep6	0	-21	swapper/6	19:04:10	6
3645577	99	25	24,0	cyclictest	0	-21	swapper/7	19:13:25	7
3645577	99	25	23,1	cyclictest	3916565	-21	ssh	21:24:11	7
3645577	99	24	19,4	cyclictest	4194104	-21	latency_hist	23:19:03	7
3645572	99	24	22,2	cyclictest	3354620	-21	kworker/u16:1+flush-8:0	19:19:29	6
3645566	99	24	22,2	cyclictest	73321	-21	kworker/u16:4+flush-8:0	23:49:32	4
3645566	99	24	22,2	cyclictest	4073320	-21	kworker/u16:2+flush-8:0	22:29:34	4
3645566	99	24	22,2	cyclictest	132927	-21	kworker/u16:0+events_unbound	00:16:53	4
3645577	99	23	22,0	cyclictest	0	-21	swapper/7	20:49:32	7
3645577	99	23	21,1	cyclictest	0	-21	swapper/7	22:04:11	7
3645566	99	23	21,2	cyclictest	4145877	-21	kworker/u16:4+flush-8:0	23:24:29	4
3645566	99	23	21,2	cyclictest	4145877	-21	kworker/u16:4+flush-8:0	23:24:29	4
3645566	99	23	20,2	cyclictest	4133719	-21	kworker/u16:3+flush-8:0	23:04:04	4
194314	2	23	0,1	sleep4	0	-21	swapper/4	00:39:04	4
3645566	99	22	20,2	cyclictest	4109561	-21	kworker/u16:0+flush-8:0	22:49:34	4
154145	2	22	0,1	sleep7	154146	-21	tr	00:19:27	7
3645577	99	21	17,3	cyclictest	124	-21	kswapd0	22:29:31	7
3645566	99	21	19,2	cyclictest	3697209	-21	kworker/u16:4+flush-8:0	19:34:25	4
3645572	99	20	17,2	cyclictest	3870113	-21	kworker/u16:1+flush-8:0	21:19:08	6
3645566	99	20	18,2	cyclictest	3697209	-21	kworker/u16:4+flush-8:0	20:09:23	4
3645566	99	20	18,2	cyclictest	3653998	-21	kworker/u16:3+events_unbound	19:29:25	4
3645577	99	19	18,0	cyclictest	0	-21	swapper/7	19:46:56	7
3645577	99	19	15,3	cyclictest	1234	-21	snmpd	00:00:58	7
3645577	99	19	13,4	cyclictest	635	-21	systemd-journal	19:41:37	7
3645566	99	19	17,2	cyclictest	4145877	-21	kworker/u16:4+flush-8:0	23:14:33	4
3645566	99	19	17,2	cyclictest	4095245	-21	kworker/u16:1+flush-8:0	22:44:28	4
3645566	99	19	17,2	cyclictest	4095245	-21	kworker/u16:1+flush-8:0	22:44:28	4
3645566	99	19	17,2	cyclictest	3870113	-21	kworker/u16:1+events_unbound	21:20:13	4
3645577	99	18	17,0	cyclictest	0	-21	swapper/7	20:22:07	7
3645577	99	18	17,0	cyclictest	0	-21	swapper/7	19:57:00	7
3645577	99	18	17,0	cyclictest	0	-21	swapper/7	19:57:00	7
3645577	99	18	16,1	cyclictest	0	-21	swapper/7	19:24:29	7
3645577	99	18	13,4	cyclictest	48965	-21	latency_hist	23:39:03	7
3645566	99	18	16,2	cyclictest	3901672	-21	kworker/u16:0+events_unbound	21:39:03	4
3645566	99	18	16,2	cyclictest	3774538	-21	kworker/u16:2+events_unbound	20:29:24	4
3645566	99	18	16,2	cyclictest	3646301	-21	kworker/u16:2+flush-8:0	19:14:19	4
3645566	99	18	15,2	cyclictest	97828	-21	kworker/u16:3+flush-8:0	00:09:06	4
3645577	99	17	16,0	cyclictest	0	-21	swapper/7	23:49:43	7
3645577	99	17	16,0	cyclictest	0	-21	swapper/7	22:59:47	7
3645577	99	17	15,1	cyclictest	132835	-21	ssh	00:12:31	7
3645577	99	17	12,4	cyclictest	3881260	-21	cat	21:09:21	7
3645566	99	17	15,2	cyclictest	4182061	-21	kworker/u16:2+events_unbound	23:36:14	4
3645566	99	17	15,2	cyclictest	4145877	-21	kworker/u16:4+events_unbound	22:59:22	4
3645566	99	17	15,2	cyclictest	3754992	-21	kworker/u16:0+flush-8:0	20:14:25	4
3645566	99	17	14,2	cyclictest	132927	-21	kworker/u16:0+flush-8:0	00:24:08	4
3645577	99	16	15,0	cyclictest	0	-21	swapper/7	21:01:08	7
3645577	99	16	15,0	cyclictest	0	-21	swapper/7	20:24:23	7
3645577	99	16	13,2	cyclictest	0	-21	swapper/7	21:59:03	7
3645577	99	16	12,3	cyclictest	73132	-21	latency_hist	23:49:04	7
3645577	99	16	12,2	cyclictest	1172	-21	tuned	19:29:30	7
3645566	99	16	14,2	cyclictest	4073320	-21	kworker/u16:2+events_unbound	22:34:17	4
3645566	99	16	14,2	cyclictest	3940431	-21	kworker/u16:4+events_unbound	22:07:13	4
3645566	99	16	14,2	cyclictest	3870113	-21	kworker/u16:1+events_unbound	21:24:33	4
3645566	99	16	14,2	cyclictest	3859768	-21	kworker/u16:3+events_unbound	21:17:13	4
3645566	99	16	14,2	cyclictest	3697209	-21	kworker/u16:4+flush-8:0	19:59:25	4
3645566	99	16	14,2	cyclictest	21459	-21	kworker/u16:0+flush-8:0	23:47:05	4
3645577	99	15	14,0	cyclictest	0	-21	swapper/7	20:34:24	7
3645577	99	15	14,0	cyclictest	0	-21	swapper/7	20:12:20	7
3645577	99	15	14,0	cyclictest	0	-21	swapper/7	20:06:40	7
3645577	99	15	12,2	cyclictest	4036622	-21	ssh	22:13:13	7
3645577	99	15	11,3	cyclictest	1234	-21	snmpd	21:44:36	7
3645570	99	15	12,3	cyclictest	0	-21	swapper/5	23:16:53	5
3645570	99	15	0,1	cyclictest	0	-21	swapper/5	21:34:24	5
3645566	99	15	13,2	cyclictest	3974162	-21	kworker/u16:0+flush-8:0	21:49:29	4
3645566	99	15	13,2	cyclictest	3974162	-21	kworker/u16:0+events_unbound	22:28:43	4
3645566	99	15	13,2	cyclictest	3974162	-21	kworker/u16:0+events_unbound	21:59:14	4
3645572	99	14	13,1	cyclictest	0	-21	swapper/6	23:44:47	6
3645572	99	14	13,1	cyclictest	0	-21	swapper/6	22:01:21	6
3645572	99	14	13,1	cyclictest	0	-21	swapper/6	00:37:26	6
3645572	99	14	0,1	cyclictest	0	-21	swapper/6	23:07:16	6
3645572	99	14	0,1	cyclictest	0	-21	swapper/6	00:02:55	6
3645572	99	14	0,14	cyclictest	0	-21	swapper/6	23:24:08	6
3645572	99	14	0,14	cyclictest	0	-21	swapper/6	23:24:08	6
3645572	99	14	0,14	cyclictest	0	-21	swapper/6	21:35:30	6
3645570	99	14	13,1	cyclictest	0	-21	swapper/5	23:47:37	5
3645570	99	14	13,1	cyclictest	0	-21	swapper/5	22:09:24	5
3645570	99	14	13,1	cyclictest	0	-21	swapper/5	19:34:25	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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