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 Mar 23, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
335452	2	63	52,7	sleep4	0	-21	swapper/4	07:00:41	4
848922	2	61	0,0	sleep7	848923	-21	sh	10:58:27	7
848922	2	61	0,0	sleep7	848923	-21	sh	10:58:27	7
335918	99	57	50,5	cyclictest	642062	-21	latency_hist	09:33:14	7
335456	2	52	42,7	sleep6	0	-21	swapper/6	07:00:43	6
335444	2	46	35,8	sleep5	0	-21	swapper/5	07:00:34	5
335918	99	44	39,4	cyclictest	920674	-21	latency_hist	11:28:15	7
335918	99	42	41,0	cyclictest	0	-21	swapper/7	10:06:04	7
335918	99	40	39,0	cyclictest	0	-21	swapper/7	07:58:48	7
335918	99	39	38,0	cyclictest	0	-21	swapper/7	12:22:05	7
335918	99	39	36,2	cyclictest	443919	-21	open_files	07:53:43	7
335918	99	38	37,1	cyclictest	821479	-21	ssh	10:43:48	7
335918	99	38	37,0	cyclictest	0	-21	swapper/7	08:28:48	7
335912	99	38	36,2	cyclictest	483312	-21	kworker/u16:1+events_unbound	08:43:41	5
335912	99	38	36,2	cyclictest	483312	-21	kworker/u16:1+events_unbound	08:23:41	5
326485	2	38	3,30	sleep7	0	-21	swapper/7	06:58:19	7
335918	99	36	34,1	cyclictest	0	-21	swapper/7	11:31:55	7
335918	99	35	35,0	cyclictest	0	-21	swapper/7	12:02:46	7
335918	99	34	33,0	cyclictest	0	-21	swapper/7	08:23:30	7
335918	99	34	30,3	cyclictest	609979	-21	cut	09:18:35	7
335918	99	33	32,0	cyclictest	0	-21	swapper/7	12:07:27	7
335918	99	33	31,1	cyclictest	569215	-21	diskmemload	09:11:46	7
335912	99	33	30,2	cyclictest	525677	-21	kworker/u16:6+events_unbound	09:48:19	5
335912	99	32	30,2	cyclictest	483312	-21	kworker/u16:1+flush-8:0	09:29:01	5
335907	99	32	30,2	cyclictest	945016	-21	kworker/u16:3+flush-8:0	11:54:44	4
335918	99	31	31,0	cyclictest	0	-21	swapper/7	09:15:50	7
335918	99	31	30,0	cyclictest	0	-21	swapper/7	08:53:40	7
335918	99	31	28,2	cyclictest	810440	-21	ssh	10:40:43	7
335912	99	31	29,2	cyclictest	945016	-21	kworker/u16:3+events_unbound	11:47:16	5
335912	99	31	29,2	cyclictest	262973	-21	kworker/u16:4+events_unbound	08:20:49	5
335918	99	30	30,0	cyclictest	0	-21	swapper/7	11:55:55	7
335918	99	30	30,0	cyclictest	0	-21	swapper/7	11:17:53	7
335918	99	30	30,0	cyclictest	0	-21	swapper/7	10:35:38	7
335912	99	30	28,2	cyclictest	425821	-21	kworker/u16:3+events_unbound	08:11:28	5
335912	99	30	28,2	cyclictest	1040310	-21	kworker/u16:1+events_unbound	12:23:44	5
335918	99	29	29,0	cyclictest	0	-21	swapper/7	12:31:49	7
335918	99	29	29,0	cyclictest	0	-21	swapper/7	11:45:46	7
335918	99	29	29,0	cyclictest	0	-21	swapper/7	11:20:23	7
335918	99	29	28,0	cyclictest	0	-21	swapper/7	12:09:50	7
335912	99	29	27,2	cyclictest	945016	-21	kworker/u16:3+events_unbound	11:49:01	5
335912	99	29	27,2	cyclictest	502283	-21	kworker/u16:2+events_unbound	08:35:48	5
335907	99	29	28,1	cyclictest	483312	-21	kworker/u16:1+events_unbound	10:26:11	4
335918	99	28	28,0	cyclictest	0	-21	swapper/7	10:10:06	7
335918	99	28	28,0	cyclictest	0	-21	swapper/7	09:35:50	7
335918	99	28	27,0	cyclictest	0	-21	swapper/7	07:11:25	7
335918	99	28	26,1	cyclictest	870547	-21	ssh	11:05:05	7
335916	99	28	26,2	cyclictest	945016	-21	kworker/u16:3+flush-8:0	12:13:35	6
335916	99	28	26,2	cyclictest	483312	-21	kworker/u16:1+events_unbound	09:54:28	6
335912	99	28	26,2	cyclictest	525677	-21	kworker/u16:6+events_unbound	08:59:19	5
335912	99	28	26,2	cyclictest	483312	-21	kworker/u16:1+events_unbound	08:50:53	5
335912	99	28	26,2	cyclictest	483312	-21	kworker/u16:1+events_unbound	08:42:52	5
335918	99	27	27,0	cyclictest	0	-21	swapper/7	10:17:39	7
335918	99	27	26,0	cyclictest	0	-21	swapper/7	09:56:02	7
335918	99	27	21,5	cyclictest	650	-21	systemd-journal	10:23:14	7
335916	99	27	25,2	cyclictest	444888	-21	kworker/u16:0+events_unbound	08:03:43	6
335912	99	27	25,2	cyclictest	750709	-21	kworker/u16:4+events_unbound	10:23:31	5
335912	99	27	25,2	cyclictest	422830	-21	kworker/u16:2+events_unbound	07:55:00	5
335918	99	26	26,0	cyclictest	0	-21	swapper/7	09:46:58	7
335918	99	26	25,0	cyclictest	0	-21	swapper/7	08:46:49	7
335918	99	26	25,0	cyclictest	0	-21	swapper/7	08:14:52	7
335916	99	26	24,2	cyclictest	406820	-21	kworker/u16:1+events_unbound	07:38:29	6
335912	99	26	24,2	cyclictest	893316	-21	kworker/u16:4+events_unbound	11:34:12	5
335912	99	26	24,2	cyclictest	444888	-21	kworker/u16:0+events_unbound	08:30:04	5
335912	99	26	24,2	cyclictest	425821	-21	kworker/u16:3+events_unbound	08:16:00	5
335918	99	25	25,0	cyclictest	0	-21	swapper/7	12:23:49	7
335918	99	25	25,0	cyclictest	0	-21	swapper/7	10:28:52	7
335918	99	25	25,0	cyclictest	0	-21	swapper/7	09:42:54	7
335918	99	25	24,0	cyclictest	0	-21	swapper/7	09:00:28	7
335918	99	25	24,0	cyclictest	0	-21	swapper/7	07:26:41	7
335916	99	25	23,2	cyclictest	335673	-21	kworker/u16:1+flush-8:0	07:08:20	6
335912	99	25	23,2	cyclictest	483312	-21	kworker/u16:1+events_unbound	08:56:53	5
335907	99	25	24,1	cyclictest	835945	-21	kworker/u16:3+events_unbound	11:04:49	4
1067870	2	25	0,1	chrt	65	-21	ksoftirqd/4	12:28:33	4
335918	99	24	24,0	cyclictest	0	-21	swapper/7	12:15:55	7
335918	99	24	23,0	cyclictest	0	-21	swapper/7	07:19:49	7
335912	99	24	22,2	cyclictest	945016	-21	kworker/u16:3+flush-8:0	11:54:16	5
335912	99	24	22,2	cyclictest	835945	-21	kworker/u16:3+events_unbound	11:13:49	5
335912	99	24	22,2	cyclictest	525677	-21	kworker/u16:6+events_unbound	09:08:15	5
335912	99	24	22,2	cyclictest	406820	-21	kworker/u16:1+events_unbound	08:00:18	5
335918	99	23	23,0	cyclictest	0	-21	swapper/7	08:51:19	7
335918	99	23	22,0	cyclictest	0	-21	swapper/7	07:40:16	7
335918	99	23	22,0	cyclictest	0	-21	swapper/7	07:07:26	7
335918	99	23	1,20	cyclictest	525676	-21	cut	08:38:34	7
335912	99	23	21,2	cyclictest	422830	-21	kworker/u16:2+events_unbound	07:45:31	5
335912	99	23	21,2	cyclictest	387217	-21	kworker/u16:0+events_unbound	07:41:32	5
335907	99	23	21,2	cyclictest	425821	-21	kworker/u16:3+flush-8:0	08:13:36	4
335918	99	22	21,0	cyclictest	0	-21	swapper/7	07:36:33	7
335916	99	22	20,2	cyclictest	483312	-21	kworker/u16:1+flush-8:0	10:43:10	6
335916	99	22	20,2	cyclictest	335673	-21	kworker/u16:1+events_unbound	07:13:38	6
335916	99	22	20,2	cyclictest	262973	-21	kworker/u16:4+events_unbound	07:43:32	6
335912	99	22	20,2	cyclictest	444888	-21	kworker/u16:0+events_unbound	08:06:18	5
335912	99	22	20,2	cyclictest	422830	-21	kworker/u16:2+events_unbound	07:51:19	5
335912	99	22	20,2	cyclictest	335673	-21	kworker/u16:1+events_unbound	07:06:53	5
335912	99	22	20,2	cyclictest	262973	-21	kworker/u16:4+events_unbound	07:31:54	5
335912	99	22	20,2	cyclictest	262973	-21	kworker/u16:4+events_unbound	07:31:54	5
335918	99	21	20,0	cyclictest	0	-21	swapper/7	07:15:56	7
335918	99	21	0,19	cyclictest	422829	-21	kthreadcore	07:43:35	7
335916	99	21	19,2	cyclictest	525677	-21	kworker/u16:6+events_unbound	08:50:30	6
335916	99	21	19,2	cyclictest	444888	-21	kworker/u16:0+events_unbound	08:36:59	6
335912	99	21	19,2	cyclictest	893316	-21	kworker/u16:4+events_unbound	11:28:57	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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