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
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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 Sat Jan 24, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3529219	99	43	40,2	cyclictest	3819207	-21	kworker/u8:3+events_unbound	12:05:22	0
3529228	99	42	39,2	cyclictest	3808731	-21	latency_hist	11:40:01	2
3529223	99	42	38,3	cyclictest	3803507	-21	kworker/u8:2+events_unbound	11:45:00	1
3529219	99	42	39,2	cyclictest	3710586	-21	kworker/u8:0+events_unbound	11:20:23	0
3529219	99	42	39,2	cyclictest	3601881	-21	kworker/u8:4+events_unbound	08:40:21	0
3529219	99	40	37,2	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	08:00:24	0
3529219	99	39	36,2	cyclictest	3595761	-21	kworker/u8:0+flush-259:0	09:15:21	0
3529219	99	39	34,3	cyclictest	252	-21	systemd-journal	09:03:28	0
3529219	99	38	36,2	cyclictest	3601881	-21	kworker/u8:4+events_unbound	08:45:25	0
3529219	99	38	35,2	cyclictest	3534372	-21	kworker/u8:3+events_unbound	08:15:25	0
3529219	99	38	35,2	cyclictest	3534372	-21	kworker/u8:3+events_unbound	08:15:25	0
3529223	99	37	33,3	cyclictest	3534372	-21	kworker/u8:3+flush-259:0	07:35:22	1
3529219	99	37	34,2	cyclictest	3710586	-21	kworker/u8:0+events_unbound	12:15:23	0
3529219	99	37	34,2	cyclictest	3595761	-21	kworker/u8:0+events_unbound	09:10:15	0
3529219	99	37	31,4	cyclictest	3612221	-21	latency_hist	08:30:01	0
3529223	99	36	33,2	cyclictest	3668837	-21	kworker/u8:1+events_unbound	10:05:21	1
3529219	99	36	33,2	cyclictest	3803507	-21	kworker/u8:2+events_unbound	11:45:22	0
3529219	99	36	33,2	cyclictest	3601881	-21	kworker/u8:4+events_unbound	08:50:16	0
3529219	99	36	33,2	cyclictest	3534372	-21	kworker/u8:3+events_unbound	07:30:21	0
3529219	99	36	32,3	cyclictest	3808987	-21	apt-get	11:40:11	0
3529233	99	35	29,4	cyclictest	3622475	-21	latency_hist	08:40:01	3
3529233	99	35	29,4	cyclictest	252	-21	systemd-journal	08:55:00	3
3529223	99	35	30,4	cyclictest	3716124	-21	/usr/sbin/munin	10:10:14	1
3529223	99	35	28,5	cyclictest	3851400	-21	latency_hist	12:20:02	1
3529219	99	35	32,2	cyclictest	3772797	-21	kworker/u8:4+events_unbound	11:30:13	0
3529219	99	35	32,2	cyclictest	3772797	-21	kworker/u8:4+events_unbound	11:25:15	0
3529219	99	35	32,2	cyclictest	3726208	-21	kworker/u8:4+flush-259:0	10:20:15	0
3529219	99	35	32,2	cyclictest	3513185	-21	kworker/u8:2+events_unbound	07:25:13	0
3529233	99	34	29,4	cyclictest	3684895	-21	/usr/sbin/munin	09:40:14	3
3529233	99	34	27,5	cyclictest	3824701	-21	latency_hist	11:55:01	3
3529228	99	34	28,4	cyclictest	3538613	-21	ntpq	07:15:20	2
3529223	99	34	31,2	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	07:25:21	1
3529219	99	34	31,2	cyclictest	3710586	-21	kworker/u8:0+events_unbound	10:30:21	0
3529219	99	34	31,2	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	08:20:23	0
3529223	99	33	29,3	cyclictest	3710586	-21	kworker/u8:0+events_unbound	10:20:00	1
3529223	99	33	28,3	cyclictest	3772797	-21	kworker/u8:4+flush-259:0	11:30:23	1
3529223	99	33	27,4	cyclictest	252	-21	systemd-journal	08:00:00	1
3529219	99	33	30,2	cyclictest	3668837	-21	kworker/u8:1+events_unbound	10:05:13	0
3529233	99	32	27,3	cyclictest	3846416	-21	kworker/u8:4+flush-259:0	12:35:16	3
3529228	99	32	29,2	cyclictest	3846416	-21	kworker/u8:4+flush-259:0	12:20:19	2
3529228	99	32	28,3	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	07:25:25	2
3529219	99	32	29,2	cyclictest	3736529	-21	kworker/u8:3+flush-259:0	10:35:27	0
3529219	99	32	28,3	cyclictest	3716111	-21	kworker/u8:3+flush-259:0	10:10:19	0
3529228	99	31	25,4	cyclictest	252	-21	systemd-journal	10:01:27	2
3529219	99	31	28,2	cyclictest	3824933	-21	kworker/u8:1+flush-259:0	12:00:21	0
3529219	99	31	28,2	cyclictest	3690449	-21	kworker/u8:2+flush-259:0	09:45:24	0
3529233	99	30	26,3	cyclictest	3710586	-21	kworker/u8:0+flush-259:0	10:25:00	3
3529233	99	30	25,3	cyclictest	3601881	-21	kworker/u8:4+flush-259:0	08:25:18	3
3529233	99	30	24,4	cyclictest	252	-21	systemd-journal	08:15:01	3
3529219	99	30	28,2	cyclictest	3726208	-21	kworker/u8:4+events_unbound	10:25:23	0
3529219	99	30	27,2	cyclictest	3595761	-21	kworker/u8:0+flush-259:0	09:05:20	0
3529228	99	29	25,3	cyclictest	3752211	-21	apt-get	10:45:11	2
3529228	99	29	23,4	cyclictest	252	-21	systemd-journal	09:13:27	2
3529223	99	29	25,3	cyclictest	3710586	-21	kworker/u8:0+flush-259:0	11:15:00	1
3529219	99	29	26,2	cyclictest	3534372	-21	kworker/u8:3+events_unbound	07:45:18	0
3529219	99	29	22,5	cyclictest	3721283	-21	/usr/sbin/munin	10:15:13	0
3529233	99	28	25,2	cyclictest	3534372	-21	kworker/u8:3+flush-259:0	08:09:59	3
3529233	99	28	22,3	cyclictest	3622714	-21	/usr/sbin/munin	08:40:13	3
3529223	99	28	26,2	cyclictest	3595761	-21	kworker/u8:0+flush-259:0	08:30:00	1
3529223	99	28	24,3	cyclictest	3710586	-21	kworker/u8:0+events_unbound	10:30:14	1
3529223	99	28	23,4	cyclictest	252	-21	systemd-journal	10:05:00	1
3529223	99	28	22,5	cyclictest	3652411	-21	ntpq	09:05:20	1
3529219	99	28	25,2	cyclictest	3710586	-21	kworker/u8:0+flush-259:0	11:10:21	0
3529219	99	28	25,2	cyclictest	3601881	-21	kworker/u8:4+flush-259:0	08:35:24	0
3529219	99	28	25,2	cyclictest	3585968	-21	kworker/u8:1+flush-259:0	08:10:23	0
3529233	99	27	23,3	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	07:10:17	3
3529228	99	27	24,2	cyclictest	3726208	-21	kworker/u8:4+flush-259:0	10:25:16	2
3529228	99	27	23,3	cyclictest	3601881	-21	kworker/u8:4+flush-259:0	09:20:01	2
3529223	99	27	23,3	cyclictest	3658730	-21	/usr/sbin/munin	09:15:22	1
3529223	99	27	23,3	cyclictest	3595761	-21	kworker/u8:0+events_unbound	09:20:15	1
3529223	99	27	22,3	cyclictest	3595761	-21	kworker/u8:0+flush-259:0	09:10:11	1
3529223	99	27	21,5	cyclictest	3637089	-21	ntpq	08:50:21	1
3529219	99	27	24,2	cyclictest	3736529	-21	kworker/u8:3+flush-259:0	10:45:15	0
3529219	99	27	23,3	cyclictest	3601881	-21	kworker/u8:4+events_unbound	09:40:15	0
3529233	99	26	21,3	cyclictest	252	-21	systemd-journal	12:25:01	3
3529228	99	26	22,3	cyclictest	3767663	-21	kworker/u8:2+flush-259:0	11:00:24	2
3529223	99	26	22,3	cyclictest	3710586	-21	kworker/u8:0+flush-259:0	11:00:14	1
3529223	99	26	22,2	cyclictest	3835453	-21	gpgv	12:05:01	1
3529219	99	26	23,2	cyclictest	3710586	-21	kworker/u8:0+flush-259:0	10:40:18	0
3529219	99	26	23,2	cyclictest	3513185	-21	kworker/u8:2+events_unbound	07:10:20	0
3529219	99	26	22,3	cyclictest	3846416	-21	kworker/u8:4+flush-259:0	12:25:23	0
3529219	99	26	22,3	cyclictest	3690449	-21	kworker/u8:2+flush-259:0	09:50:44	0
3529219	99	26	20,4	cyclictest	3824941	-21	/usr/sbin/munin	11:55:14	0
3529219	99	26	20,4	cyclictest	252	-21	systemd-journal	11:07:20	0
3529233	99	25	22,2	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	07:29:59	3
3529233	99	25	21,3	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	08:20:21	3
3529233	99	25	20,4	cyclictest	3690449	-21	kworker/u8:2+flush-259:0	09:50:25	3
3529233	99	25	20,3	cyclictest	252	-21	systemd-journal	10:17:00	3
3529233	99	25	19,4	cyclictest	3866817	-21	latency_hist	12:35:00	3
3529233	99	25	19,4	cyclictest	3762292	-21	latency_hist	10:55:00	3
3529233	99	25	19,4	cyclictest	3762292	-21	latency_hist	10:55:00	3
3529228	99	25	21,3	cyclictest	3690449	-21	kworker/u8:2+flush-259:0	09:45:21	2
3529223	99	25	22,2	cyclictest	3819207	-21	kworker/u8:3+events_unbound	12:10:14	1
3529223	99	25	22,2	cyclictest	3725934	-21	kworker/u8:2+flush-259:0	10:35:15	1
3529223	99	25	21,3	cyclictest	3690449	-21	kworker/u8:2+flush-259:0	09:50:06	1
3529223	99	25	20,3	cyclictest	1460611	-21	kworker/u8:1+events_unbound	07:15:12	1
3529223	99	25	18,5	cyclictest	252	-21	systemd-journal	07:11:27	1
3529219	99	25	22,2	cyclictest	3846416	-21	kworker/u8:4+flush-259:0	12:35:19	0
3529219	99	25	22,2	cyclictest	3595761	-21	kworker/u8:0+flush-259:0	08:30:15	0
3529219	99	25	22,2	cyclictest	3513185	-21	kworker/u8:2+flush-259:0	07:40:16	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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