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 Tue Aug 18, 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
3309000	99	70	68,2	cyclictest	3409640	-21	kworker/u16:4+events_unbound	08:22:04	6
3308515	2	57	46,7	sleep4	0	-21	swapper/4	07:05:10	4
3309000	99	52	49,2	cyclictest	3341696	-21	kworker/u16:1+events_unbound	07:47:56	6
3308997	99	51	47,4	cyclictest	3922661	-21	kworker/u16:1+flush-8:0	11:47:42	5
3308997	99	51	46,5	cyclictest	3740455	-21	kworker/u16:1+flush-8:0	10:37:42	5
3308995	99	51	49,2	cyclictest	3535740	-21	kworker/u16:4+events_unbound	09:13:16	4
3308995	99	49	47,2	cyclictest	3526332	-21	kworker/u16:3+flush-8:0	09:03:08	4
3308995	99	47	44,2	cyclictest	3935150	-21	kworker/u16:2+flush-8:0	12:23:07	4
3308449	2	46	36,7	sleep5	0	-21	swapper/5	07:04:15	5
3309000	99	45	43,2	cyclictest	3922661	-21	kworker/u16:1+events_unbound	12:32:56	6
3309000	99	45	42,2	cyclictest	3680132	-21	kworker/u16:5+flush-8:0	10:23:10	6
3309000	99	45	42,2	cyclictest	3567767	-21	kworker/u16:0+flush-8:0	09:47:56	6
3308997	99	45	41,3	cyclictest	3740455	-21	kworker/u16:1+flush-8:0	10:28:00	5
3308995	99	45	43,2	cyclictest	3863585	-21	kworker/u16:5+flush-8:0	11:33:14	4
3309000	99	44	42,2	cyclictest	3400098	-21	kworker/u16:2+events_unbound	08:07:42	6
3308995	99	44	42,2	cyclictest	3800681	-21	kworker/u16:2+events_unbound	11:03:14	4
3308995	99	44	42,2	cyclictest	3516363	-21	kworker/u16:1+events_unbound	09:08:15	4
3308995	99	44	41,2	cyclictest	3341696	-21	kworker/u16:1+events_unbound	07:52:59	4
3308995	99	43	41,2	cyclictest	3680132	-21	kworker/u16:5+flush-8:0	10:33:20	4
3309001	99	42	41,0	cyclictest	0	-21	swapper/7	09:53:18	7
3309001	99	42	41,0	cyclictest	0	-21	swapper/7	09:48:11	7
3309001	99	42	39,2	cyclictest	3860086	-21	ntpq	11:13:10	7
3309000	99	42	40,2	cyclictest	3800681	-21	kworker/u16:2+flush-8:0	10:53:02	6
3308995	99	42	40,2	cyclictest	3535740	-21	kworker/u16:4+events_unbound	09:23:10	4
3308995	99	42	40,2	cyclictest	3535740	-21	kworker/u16:4+events_unbound	09:23:10	4
3308549	2	42	7,30	sleep7	0	-21	swapper/7	07:05:37	7
3309000	99	41	38,2	cyclictest	3468449	-21	kworker/u16:0+events_unbound	08:27:56	6
3308995	99	41	39,2	cyclictest	4023690	-21	kworker/u16:3+events_unbound	12:28:10	4
3309000	99	40	37,2	cyclictest	3567767	-21	kworker/u16:0+events_unbound	09:27:57	6
3309000	99	40	37,2	cyclictest	3535740	-21	kworker/u16:4+flush-8:0	09:13:03	6
3308995	99	40	38,2	cyclictest	3680132	-21	kworker/u16:5+events_unbound	10:48:09	4
3308995	99	40	38,2	cyclictest	3680131	-21	kworker/u16:4+events_unbound	10:07:59	4
3308995	99	40	38,2	cyclictest	3516363	-21	kworker/u16:1+flush-8:0	09:57:58	4
3308995	99	40	37,2	cyclictest	3740455	-21	kworker/u16:1+flush-8:0	10:38:03	4
3309001	99	39	38,0	cyclictest	0	-21	swapper/7	07:43:14	7
3309001	99	39	34,3	cyclictest	3584100	-21	kthreadcore	09:23:04	7
3309001	99	39	34,3	cyclictest	3584100	-21	kthreadcore	09:23:04	7
3309000	99	39	37,2	cyclictest	3644324	-21	kworker/u16:3+events_unbound	10:03:10	6
3309000	99	39	37,2	cyclictest	3644324	-21	kworker/u16:3+events_unbound	10:03:10	6
3308995	99	39	37,2	cyclictest	3935150	-21	kworker/u16:2+events_unbound	11:58:14	4
3308995	99	39	37,2	cyclictest	3863585	-21	kworker/u16:5+flush-8:0	11:27:56	4
3308995	99	39	37,2	cyclictest	3618297	-21	kworker/u16:2+events_unbound	09:43:16	4
3308995	99	39	36,2	cyclictest	3341696	-21	kworker/u16:1+events_unbound	07:57:44	4
3309001	99	38	36,1	cyclictest	0	-21	swapper/7	10:08:14	7
3309001	99	38	31,5	cyclictest	648	-21	systemd-journal	10:32:42	7
3309000	99	38	36,2	cyclictest	3922661	-21	kworker/u16:1+events_unbound	12:03:52	6
3309000	99	38	36,2	cyclictest	3922661	-21	kworker/u16:1+events_unbound	12:03:52	6
3309000	99	38	36,2	cyclictest	3516363	-21	kworker/u16:1+flush-8:0	09:18:12	6
3308997	99	38	36,2	cyclictest	3727958	-21	kworker/u16:0+events_unbound	10:42:42	5
3308995	99	38	36,2	cyclictest	3922661	-21	kworker/u16:1+events_unbound	12:11:24	4
3308995	99	38	36,2	cyclictest	3814475	-21	kworker/u16:4+events_unbound	10:59:31	4
3308995	99	38	36,2	cyclictest	3680131	-21	kworker/u16:4+events_unbound	10:17:41	4
3308995	99	38	36,2	cyclictest	3535740	-21	kworker/u16:4+events_unbound	09:20:24	4
3308995	99	38	36,2	cyclictest	3516363	-21	kworker/u16:1+flush-8:0	09:53:28	4
3309001	99	37	35,1	cyclictest	3676850	-21	strings	09:58:09	7
3309001	99	37	33,3	cyclictest	3961389	-21	/usr/sbin/munin	11:58:03	7
3309000	99	37	35,2	cyclictest	3814475	-21	kworker/u16:4+events_unbound	11:37:33	6
3309000	99	37	35,2	cyclictest	3618297	-21	kworker/u16:2+flush-8:0	09:43:09	6
3308997	99	37	35,2	cyclictest	3516363	-21	kworker/u16:1+flush-8:0	10:08:00	5
3308995	99	37	35,2	cyclictest	3935150	-21	kworker/u16:2+events_unbound	12:04:24	4
3308995	99	37	35,2	cyclictest	3935150	-21	kworker/u16:2+events_unbound	12:04:24	4
3308995	99	37	35,2	cyclictest	3863585	-21	kworker/u16:5+events_unbound	11:18:09	4
3308995	99	37	35,2	cyclictest	3861668	-21	kworker/u16:1+events_unbound	11:16:47	4
3308995	99	37	35,2	cyclictest	3836881	-21	kworker/u16:0+events_unbound	11:07:55	4
3308995	99	37	35,2	cyclictest	3727958	-21	kworker/u16:0+events_unbound	10:30:24	4
3309001	99	36	35,0	cyclictest	0	-21	swapper/7	11:19:27	7
3309001	99	36	34,1	cyclictest	3916908	-21	kthreadcore	11:38:02	7
3309001	99	36	33,2	cyclictest	3615841	-21	ntpq	09:33:11	7
3309001	99	36	33,2	cyclictest	3525387	-21	ntp_states	08:53:10	7
3309000	99	36	34,2	cyclictest	3863585	-21	kworker/u16:5+events_unbound	11:18:11	6
3308997	99	36	33,2	cyclictest	3935150	-21	kworker/u16:2+flush-8:0	12:17:59	5
3308995	99	36	34,2	cyclictest	3863164	-21	kworker/u16:3+flush-8:0	11:48:15	4
3308995	99	36	34,2	cyclictest	3727958	-21	kworker/u16:0+events_unbound	10:57:08	4
3308995	99	36	34,2	cyclictest	3567767	-21	kworker/u16:0+events_unbound	09:35:48	4
3309000	99	35	33,2	cyclictest	3935150	-21	kworker/u16:2+events_unbound	12:30:51	6
3309000	99	35	33,2	cyclictest	3909672	-21	kworker/u16:0+events_unbound	11:41:53	6
3309000	99	35	33,2	cyclictest	3680132	-21	kworker/u16:5+flush-8:0	10:47:41	6
3309000	99	35	33,2	cyclictest	3680132	-21	kworker/u16:5+flush-8:0	10:47:41	6
3309000	99	35	33,1	cyclictest	3409640	-21	kworker/u16:4+events_unbound	08:48:01	6
3309000	99	35	33,1	cyclictest	3409640	-21	kworker/u16:4+events_unbound	08:48:01	6
3309000	99	35	32,2	cyclictest	3400098	-21	kworker/u16:2+flush-8:0	08:22:57	6
3308995	99	35	33,2	cyclictest	3935150	-21	kworker/u16:2+events_unbound	12:20:43	4
3308995	99	35	33,2	cyclictest	3400098	-21	kworker/u16:2+flush-8:0	08:42:57	4
3309001	99	34	32,1	cyclictest	3396034	-21	kthreadcore	07:48:02	7
3309001	99	34	32,1	cyclictest	0	-21	swapper/7	09:40:12	7
3309001	99	34	32,1	cyclictest	0	-21	swapper/7	08:43:14	7
3309000	99	34	32,2	cyclictest	3409640	-21	kworker/u16:4+events_unbound	08:43:04	6
3309000	99	34	32,2	cyclictest	3341696	-21	kworker/u16:1+flush-8:0	07:22:42	6
3308997	99	34	32,2	cyclictest	3935150	-21	kworker/u16:2+flush-8:0	12:08:09	5
3308997	99	34	31,3	cyclictest	3341696	-21	kworker/u16:1+flush-8:0	07:53:00	5
3308995	99	34	32,2	cyclictest	3935150	-21	kworker/u16:2+events_unbound	12:34:04	4
3308995	99	34	32,2	cyclictest	3740455	-21	kworker/u16:1+events_unbound	10:47:12	4
3308995	99	34	32,2	cyclictest	3740455	-21	kworker/u16:1+events_unbound	10:47:12	4
3308995	99	34	32,2	cyclictest	3680132	-21	kworker/u16:5+events_unbound	10:24:24	4
3308995	99	34	32,2	cyclictest	3680132	-21	kworker/u16:5+events_unbound	10:21:32	4
3308995	99	34	32,2	cyclictest	3618297	-21	kworker/u16:2+events_unbound	09:39:08	4
3309001	99	33	32,0	cyclictest	0	-21	swapper/7	12:08:17	7
3309001	99	33	32,0	cyclictest	0	-21	swapper/7	11:32:19	7
3309001	99	33	32,0	cyclictest	0	-21	swapper/7	10:47:19	7
3309001	99	33	32,0	cyclictest	0	-21	swapper/7	10:47:19	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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