OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Thu Apr 02, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3469893	99	53	49,3	cyclictest	3470737	-21	kworker/u8:4+events_unbound	07:15:11	1
3469893	99	53	48,2	cyclictest	3686704	-21	kworker/u8:1+events_unbound	11:15:23	1
3469893	99	50	46,3	cyclictest	3712719	-21	kworker/u8:2+events_unbound	12:00:24	1
3469902	99	49	46,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	11:25:25	3
3469893	99	49	46,2	cyclictest	3475971	-21	kworker/u8:1+flush-259:0	08:35:24	1
3469885	99	49	42,3	cyclictest	3541996	-21	kworker/u8:0+events_unbound	09:00:14	0
3469902	99	47	44,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	08:50:16	3
3469893	99	46	42,2	cyclictest	3579668	-21	kworker/u8:0+events_unbound	10:40:12	1
3469885	99	46	42,3	cyclictest	3650818	-21	kworker/u8:3+events_unbound	11:50:19	0
3469885	99	46	39,2	cyclictest	3500272	-21	kworker/u8:4+events_unbound	10:00:14	0
3469893	99	45	41,3	cyclictest	3739195	-21	apt-get	11:55:11	1
3469885	99	45	41,3	cyclictest	3579668	-21	kworker/u8:0+events_unbound	10:25:23	0
3469902	99	44	41,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	08:45:12	3
3469902	99	44	41,2	cyclictest	3470737	-21	kworker/u8:4+events_unbound	07:15:18	3
3469893	99	44	38,3	cyclictest	3650818	-21	kworker/u8:3+events_unbound	11:45:23	1
3469902	99	43	40,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	12:25:22	3
3469902	99	43	39,3	cyclictest	3765111	-21	kworker/u8:0+events_unbound	12:35:23	3
3469902	99	43	39,3	cyclictest	3666326	-21	kworker/u8:2+events_unbound	11:00:23	3
3469902	99	43	39,3	cyclictest	3666288	-21	latency_hist	10:45:01	3
3469885	99	43	40,2	cyclictest	3500272	-21	kworker/u8:4+events_unbound	10:15:21	0
3469902	99	42	39,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	08:40:23	3
3469893	99	42	39,2	cyclictest	3770031	-21	kworker/u8:1+events_unbound	12:25:20	1
3469893	99	42	38,3	cyclictest	3579668	-21	kworker/u8:0+flush-259:0	09:45:21	1
3469885	99	42	38,3	cyclictest	3619880	-21	kworker/u8:1+flush-259:0	10:05:24	0
3469902	99	41	38,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	07:25:10	3
3469902	99	41	37,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	09:30:23	3
3469893	99	41	39,2	cyclictest	3686704	-21	kworker/u8:1+events_unbound	11:25:15	1
3469902	99	40	37,2	cyclictest	3712719	-21	kworker/u8:2+events_unbound	11:35:24	3
3469893	99	40	37,2	cyclictest	3579668	-21	kworker/u8:0+events_unbound	10:50:15	1
3469893	99	40	35,3	cyclictest	3614702	-21	latency_hist	09:55:00	1
3469885	99	40	37,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	10:30:18	0
3469885	99	40	36,3	cyclictest	3749194	-21	kworker/u8:4+events_unbound	12:15:21	0
3469885	99	40	36,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	08:55:13	0
3469893	99	39	36,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	07:25:09	1
3469893	99	39	35,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	08:10:15	1
3469893	99	39	35,2	cyclictest	3579668	-21	kworker/u8:0+events_unbound	10:00:19	1
3469885	99	39	36,2	cyclictest	3712719	-21	kworker/u8:2+events_unbound	11:35:22	0
3469902	99	38	36,2	cyclictest	3500272	-21	kworker/u8:4+events_unbound	09:50:22	3
3469902	99	38	35,2	cyclictest	3697296	-21	kworker/u8:0+events_unbound	11:20:21	3
3469902	99	38	35,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	10:50:22	3
3469893	99	38	35,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	12:15:13	1
3469893	99	38	34,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	08:05:17	1
3469902	99	37	34,2	cyclictest	3770031	-21	kworker/u8:1+events_unbound	12:30:14	3
3469902	99	37	34,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	10:30:25	3
3469893	99	37	34,2	cyclictest	3697296	-21	kworker/u8:0+events_unbound	11:20:13	1
3469893	99	37	34,2	cyclictest	3562724	-21	kworker/u8:1+events_unbound	09:15:16	1
3469885	99	37	34,2	cyclictest	3712719	-21	kworker/u8:2+events_unbound	12:00:22	0
3469885	99	37	34,2	cyclictest	3712719	-21	kworker/u8:2+events_unbound	11:30:14	0
3469885	99	37	34,2	cyclictest	3692047	-21	kworker/u8:2+events_unbound	11:10:19	0
3469885	99	37	34,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	07:55:20	0
3469885	99	37	33,3	cyclictest	3770031	-21	kworker/u8:1+events_unbound	12:30:12	0
3469885	99	37	33,3	cyclictest	3463543	-21	kworker/u8:3+events_unbound	07:12:23	0
3469893	99	36	33,2	cyclictest	3500272	-21	kworker/u8:4+flush-259:0	08:50:23	1
3469893	99	36	32,3	cyclictest	3475971	-21	kworker/u8:1+events_unbound	08:20:19	1
3469885	99	36	29,5	cyclictest	3650818	-21	kworker/u8:3+flush-259:0	11:00:17	0
3469902	99	35	31,3	cyclictest	400374	-21	kworker/u8:0+events_unbound	07:40:01	3
3469893	99	35	32,2	cyclictest	3765111	-21	kworker/u8:0+events_unbound	12:35:12	1
3469893	99	35	32,2	cyclictest	3686704	-21	kworker/u8:1+events_unbound	11:40:14	1
3469885	99	35	32,2	cyclictest	3650818	-21	kworker/u8:3+flush-259:0	10:55:21	0
3469885	99	35	32,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	07:35:17	0
3469885	99	35	30,2	cyclictest	3765111	-21	kworker/u8:0+events_unbound	12:35:14	0
3469893	99	34	31,2	cyclictest	3541996	-21	kworker/u8:0+events_unbound	09:05:14	1
3469893	99	34	30,3	cyclictest	3692047	-21	kworker/u8:2+flush-259:0	11:10:19	1
3469893	99	34	30,3	cyclictest	3619880	-21	kworker/u8:1+events_unbound	10:20:13	1
3469885	99	34	31,2	cyclictest	3650818	-21	kworker/u8:3+flush-259:0	11:25:20	0
3469885	99	34	31,2	cyclictest	3579668	-21	kworker/u8:0+flush-259:0	11:05:25	0
3469885	99	34	30,3	cyclictest	3500272	-21	kworker/u8:4+flush-259:0	09:35:23	0
3469885	99	34	30,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	08:30:24	0
3469902	99	33	30,2	cyclictest	3463543	-21	kworker/u8:3+events_unbound	07:13:57	3
3469902	99	33	28,2	cyclictest	3712719	-21	kworker/u8:2+events_unbound	11:45:12	3
3469893	99	33	30,2	cyclictest	3541996	-21	kworker/u8:0+flush-259:0	09:00:16	1
3469893	99	33	29,3	cyclictest	3579668	-21	kworker/u8:0+events_unbound	10:25:15	1
3469893	99	33	29,3	cyclictest	3475971	-21	kworker/u8:1+events_unbound	07:55:18	1
3469885	99	33	30,2	cyclictest	3541996	-21	kworker/u8:0+events_unbound	09:05:20	0
3469885	99	33	29,3	cyclictest	3697296	-21	kworker/u8:0+events_unbound	11:20:17	0
3469885	99	33	28,2	cyclictest	3579668	-21	kworker/u8:0+flush-259:0	10:45:17	0
3469885	99	33	26,5	cyclictest	3727733	-21	ntpq	11:40:20	0
3469893	99	32	29,2	cyclictest	3551895	-21	kworker/u8:3+events_unbound	09:10:22	1
3469893	99	32	29,2	cyclictest	3488184	-21	kworker/u8:4+events_unbound	07:45:18	1
3469893	99	32	29,2	cyclictest	3475971	-21	kworker/u8:1+events_unbound	08:45:15	1
3469885	99	32	29,2	cyclictest	3579668	-21	kworker/u8:0+flush-259:0	09:30:18	0
3469885	99	32	28,3	cyclictest	400374	-21	kworker/u8:0+events_unbound	08:05:09	0
3469902	99	31	28,3	cyclictest	3712719	-21	kworker/u8:2+events_unbound	12:04:19	3
3469902	99	31	28,2	cyclictest	3573473	-21	kworker/u8:2+events_unbound	09:15:25	3
3469897	99	31	27,3	cyclictest	3703096	-21	/usr/sbin/munin	11:20:14	2
3469897	99	31	27,3	cyclictest	252	-21	systemd-journal	07:58:56	2
3469893	99	31	28,2	cyclictest	3500272	-21	kworker/u8:4+events_unbound	10:10:22	1
3469885	99	31	28,2	cyclictest	3579668	-21	kworker/u8:0+events_unbound	09:20:21	0
3469885	99	31	27,3	cyclictest	3470274	-21	kworker/u8:2+flush-259:0	08:10:28	0
3469902	99	30	27,2	cyclictest	400374	-21	kworker/u8:0+events_unbound	07:20:52	3
3469902	99	30	27,2	cyclictest	3541996	-21	kworker/u8:0+events_unbound	09:08:02	3
3469897	99	30	26,3	cyclictest	3755046	-21	/usr/sbin/munin	12:10:12	2
3469893	99	30	26,3	cyclictest	3650818	-21	kworker/u8:3+events_unbound	12:10:17	1
3469885	99	30	27,2	cyclictest	3650818	-21	kworker/u8:3+events_unbound	10:50:21	0
3469885	99	30	26,3	cyclictest	3500272	-21	kworker/u8:4+events_unbound	08:50:21	0
3469885	99	30	25,2	cyclictest	3500272	-21	kworker/u8:4+events_unbound	10:10:24	0
3469902	99	29	27,2	cyclictest	3541996	-21	kworker/u8:0+events_unbound	08:55:26	3
3469902	99	29	26,2	cyclictest	3593944	-21	kworker/u8:2+events_unbound	09:38:00	3
3469902	99	29	26,2	cyclictest	3500272	-21	kworker/u8:4+events_unbound	09:55:12	3
3469902	99	29	25,3	cyclictest	3650818	-21	kworker/u8:3+events_unbound	12:12:20	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34