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 Jun 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
3857626	2	98	0,1	sleep7	3857625	-21	sh	19:51:28	7
196704	2	95	0,0	sleep4	0	-21	swapper/4	23:46:45	4
196704	2	95	0,0	sleep4	0	-21	swapper/4	23:46:45	4
3766963	2	58	48,7	sleep4	0	-21	swapper/4	19:02:06	4
3767142	2	50	38,9	sleep5	0	-21	swapper/5	19:04:40	5
3767554	99	45	41,3	cyclictest	145589	-21	kworker/u16:1+events_unbound	00:31:54	4
3758925	2	41	3,31	sleep7	0	-21	swapper/7	19:01:45	7
3767559	99	40	36,4	cyclictest	3896201	-21	kworker/u16:3+flush-8:0	21:16:28	5
3767572	99	36	0,34	cyclictest	635	-21	systemd-journal	22:36:28	7
3767568	99	34	32,2	cyclictest	49181	-21	kworker/u16:1+flush-8:0	23:06:58	6
3767568	99	34	32,2	cyclictest	49181	-21	kworker/u16:1+flush-8:0	23:06:58	6
3767559	99	33	31,2	cyclictest	3896201	-21	kworker/u16:3+events_unbound	21:26:50	5
3767572	99	30	26,3	cyclictest	124	-21	kswapd0	23:26:41	7
3767572	99	30	0,28	cyclictest	3800058	-21	latency_hist	19:21:29	7
3767087	2	30	20,7	sleep6	0	-21	swapper/6	19:03:52	6
3767568	99	29	27,2	cyclictest	145589	-21	kworker/u16:1+flush-8:0	23:36:54	6
71261	2	28	0,1	chrt	71259	-21	ssh	22:52:39	7
3767572	99	28	27,0	cyclictest	0	-21	swapper/7	20:26:53	7
3767572	99	28	27,0	cyclictest	0	-21	swapper/7	20:26:53	7
3767559	99	28	25,3	cyclictest	108981	-21	kworker/u16:2+events_unbound	23:46:48	5
3767559	99	28	25,3	cyclictest	108981	-21	kworker/u16:2+events_unbound	23:46:48	5
3767559	99	27	25,2	cyclictest	49181	-21	kworker/u16:1+events_unbound	22:52:02	5
3767568	99	26	24,2	cyclictest	3896201	-21	kworker/u16:3+events_unbound	21:11:43	6
3767568	99	26	24,2	cyclictest	3867628	-21	kworker/u16:0+flush-8:0	21:41:40	6
3767572	99	25	23,1	cyclictest	0	-21	swapper/7	23:01:45	7
3767554	99	25	22,2	cyclictest	3767768	-21	kworker/u16:1+flush-8:0	19:11:54	4
3767568	99	24	19,4	cyclictest	289769	-21	updatedb	00:26:05	6
3767559	99	24	23,1	cyclictest	145589	-21	kworker/u16:1+events_unbound	00:31:27	5
3767559	99	24	23,1	cyclictest	145589	-21	kworker/u16:1+events_unbound	00:31:27	5
3767559	99	24	22,2	cyclictest	4158567	-21	kworker/u16:1+flush-8:0	22:35:21	5
3767559	99	24	22,2	cyclictest	4037925	-21	kworker/u16:1+flush-8:0	21:41:26	5
3767559	99	24	22,2	cyclictest	218211	-21	kworker/u16:3+events_unbound	00:16:57	5
3767559	99	23	21,2	cyclictest	3963402	-21	kworker/u16:5+events_unbound	20:51:30	5
3767559	99	23	21,2	cyclictest	3800435	-21	kworker/u16:3+flush-8:0	19:56:24	5
3767554	99	23	21,2	cyclictest	49181	-21	kworker/u16:1+flush-8:0	23:01:48	4
3767572	99	22	0,15	cyclictest	4001713	-21	diskmemload	23:56:51	7
3767568	99	22	20,2	cyclictest	4158567	-21	kworker/u16:1+events_unbound	22:16:42	6
3767568	99	22	20,2	cyclictest	3896201	-21	kworker/u16:3+events_unbound	20:46:58	6
3767568	99	22	19,2	cyclictest	218211	-21	kworker/u16:3+flush-8:0	00:01:53	6
3767559	99	22	20,2	cyclictest	3867628	-21	kworker/u16:0+events_unbound	21:41:41	5
3767559	99	22	20,2	cyclictest	3782000	-21	kworker/u16:0+events_unbound	19:26:47	5
3767559	99	22	20,2	cyclictest	3767768	-21	kworker/u16:1+flush-8:0	19:11:50	5
3767559	99	22	20,2	cyclictest	3054661	-21	kworker/u16:4+flush-8:0	19:06:55	5
3767559	99	22	19,2	cyclictest	3767768	-21	kworker/u16:1+events_unbound	19:46:43	5
3767554	99	22	19,2	cyclictest	4122657	-21	kworker/u16:0+flush-8:0	23:06:43	4
3767554	99	22	19,2	cyclictest	4122657	-21	kworker/u16:0+flush-8:0	23:06:43	4
3767568	99	21	19,2	cyclictest	3867628	-21	kworker/u16:0+flush-8:0	20:51:51	6
3767568	99	21	19,2	cyclictest	145589	-21	kworker/u16:1+flush-8:0	00:06:56	6
3767559	99	21	19,2	cyclictest	145589	-21	kworker/u16:1+flush-8:0	23:29:17	5
3767568	99	20	17,2	cyclictest	3867628	-21	kworker/u16:0+events_unbound	20:16:52	6
3767559	99	20	18,2	cyclictest	218163	-21	kworker/u16:0+events_unbound	00:04:37	5
3767559	99	20	18,2	cyclictest	145589	-21	kworker/u16:1+flush-8:0	23:41:14	5
3767559	99	20	18,2	cyclictest	108981	-21	kworker/u16:2+events_unbound	23:57:29	5
136911	2	20	0,1	sleep5	0	-21	swapper/5	23:21:46	5
3767572	99	19	15,3	cyclictest	0	-21	swapper/7	23:21:28	7
3767559	99	19	17,2	cyclictest	3896201	-21	kworker/u16:3+flush-8:0	21:06:57	5
3767559	99	19	17,2	cyclictest	3896201	-21	kworker/u16:3+flush-8:0	21:06:57	5
3767559	99	19	17,2	cyclictest	3896201	-21	kworker/u16:3+flush-8:0	20:56:51	5
3767572	99	18	14,3	cyclictest	124	-21	kswapd0	23:31:42	7
3767572	99	18	14,3	cyclictest	1234	-21	snmpd	20:03:55	7
3767568	99	18	16,2	cyclictest	3767768	-21	kworker/u16:1+flush-8:0	19:32:00	6
3767559	99	18	16,2	cyclictest	4058977	-21	kworker/u16:2+events_unbound	22:15:38	5
3767559	99	18	16,2	cyclictest	145589	-21	kworker/u16:1+events_unbound	23:36:14	5
3767559	99	18	16,2	cyclictest	108981	-21	kworker/u16:2+flush-8:0	23:51:55	5
3767559	99	18	15,3	cyclictest	49181	-21	kworker/u16:1+flush-8:0	22:46:47	5
3767559	99	18	15,2	cyclictest	3963402	-21	kworker/u16:5+events_unbound	21:01:45	5
3767572	99	17	12,4	cyclictest	289978	-21	latency_hist	00:26:27	7
3767568	99	17	15,2	cyclictest	49181	-21	kworker/u16:1+flush-8:0	22:51:57	6
3767559	99	17	15,2	cyclictest	4058977	-21	kworker/u16:2+events_unbound	22:05:38	5
3767572	99	16	13,2	cyclictest	124	-21	kswapd0	23:36:42	7
3767572	99	16	0,14	cyclictest	0	-21	swapper/7	22:46:53	7
3767572	99	16	0,14	cyclictest	0	-21	swapper/7	19:51:53	7
3767559	99	16	14,2	cyclictest	70344	-21	kworker/u16:3+events_unbound	22:56:56	5
3767559	99	16	14,2	cyclictest	4122657	-21	kworker/u16:0+flush-8:0	21:57:08	5
3767559	99	16	14,2	cyclictest	4122657	-21	kworker/u16:0+events_unbound	23:13:38	5
3767559	99	16	14,2	cyclictest	3782000	-21	kworker/u16:0+events_unbound	19:36:47	5
3767554	99	16	12,3	cyclictest	3782000	-21	kworker/u16:0+flush-8:0	19:26:55	4
3767554	99	16	0,13	cyclictest	0	-21	swapper/4	21:37:36	4
3767572	99	15	6,7	cyclictest	6382	-21	gvfs-afc-volume	21:41:39	7
3767572	99	15	14,0	cyclictest	0	-21	swapper/7	21:26:22	7
3767572	99	15	14,0	cyclictest	0	-21	swapper/7	19:31:43	7
3767572	99	15	12,2	cyclictest	0	-21	swapper/7	21:31:53	7
3767572	99	15	11,3	cyclictest	124	-21	kswapd0	22:56:41	7
3767572	99	15	0,13	cyclictest	0	-21	swapper/7	21:01:53	7
3767568	99	15	14,1	cyclictest	0	-21	swapper/6	23:29:55	6
3767568	99	15	13,2	cyclictest	4122657	-21	kworker/u16:0+events_unbound	22:46:42	6
3767568	99	15	13,2	cyclictest	3867628	-21	kworker/u16:0+events_unbound	21:06:46	6
3767568	99	15	13,2	cyclictest	3867628	-21	kworker/u16:0+events_unbound	21:06:46	6
3767568	99	15	13,2	cyclictest	108981	-21	kworker/u16:2+events_unbound	23:11:41	6
3767568	99	15	12,2	cyclictest	3896201	-21	kworker/u16:3+flush-8:0	20:41:54	6
3767568	99	15	12,2	cyclictest	3767768	-21	kworker/u16:1+flush-8:0	19:46:45	6
3767568	99	15	11,3	cyclictest	3989828	-21	cut	20:56:50	6
3767559	99	15	13,2	cyclictest	4122657	-21	kworker/u16:0+flush-8:0	23:01:43	5
3767559	99	15	13,2	cyclictest	4037925	-21	kworker/u16:1+flush-8:0	21:21:53	5
3767559	99	15	12,2	cyclictest	49181	-21	kworker/u16:1+events_unbound	23:06:44	5
3767559	99	15	12,2	cyclictest	49181	-21	kworker/u16:1+events_unbound	23:06:44	5
3767559	99	15	11,4	cyclictest	3857663	-21	kworker/u16:2+flush-8:0	20:31:28	5
3767559	99	15	11,4	cyclictest	3857663	-21	kworker/u16:2+flush-8:0	20:31:28	5
3767554	99	15	9,6	cyclictest	108981	-21	kworker/u16:2+flush-8:0	00:21:58	4
3767554	99	15	12,2	cyclictest	3896201	-21	kworker/u16:3+flush-8:0	20:41:45	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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