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 Feb 19, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3654394	99	47	44,2	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:50:14	3
3654394	99	46	43,2	cyclictest	3888723	-21	kworker/u8:3+events_unbound	22:55:23	3
3654394	99	46	42,3	cyclictest	3778678	-21	kworker/u8:2+events_unbound	21:20:16	3
3654378	99	46	41,3	cyclictest	3752760	-21	apt-get	20:45:13	0
3654394	99	45	42,2	cyclictest	3831107	-21	kworker/u8:4+events_unbound	22:10:15	3
3654394	99	45	42,2	cyclictest	3747366	-21	kworker/u8:2+events_unbound	20:45:24	3
3654394	99	45	42,2	cyclictest	3606879	-21	kworker/u8:2+events_unbound	19:40:20	3
3654394	99	44	40,3	cyclictest	3852184	-21	kworker/u8:3+events_unbound	22:40:24	3
3654394	99	44	38,3	cyclictest	3768351	-21	kworker/u8:0+events_unbound	21:30:26	3
3654394	99	43	40,2	cyclictest	3825933	-21	kworker/u8:1+events_unbound	22:00:15	3
3654378	99	43	38,4	cyclictest	3747574	-21	/usr/sbin/munin	20:40:15	0
3654394	99	42	39,2	cyclictest	3899392	-21	kworker/u8:0+events_unbound	23:10:22	3
3654394	99	41	37,3	cyclictest	3778678	-21	kworker/u8:2+events_unbound	22:50:24	3
3654394	99	40	38,2	cyclictest	3778678	-21	kworker/u8:2+events_unbound	22:05:22	3
3654394	99	40	37,2	cyclictest	3899392	-21	kworker/u8:0+events_unbound	23:20:23	3
3654394	99	39	36,2	cyclictest	3925436	-21	kworker/u8:4+events_unbound	23:30:15	3
3654394	99	39	36,2	cyclictest	3825933	-21	kworker/u8:1+events_unbound	22:45:21	3
3654394	99	39	34,2	cyclictest	3606879	-21	kworker/u8:2+events_unbound	20:10:14	3
3654394	99	38	35,2	cyclictest	3756610	-21	kworker/u8:3+events_unbound	21:10:18	3
3654389	99	38	33,3	cyclictest	3815879	-21	apt-get	21:45:11	2
3654378	99	38	32,4	cyclictest	3981939	-21	latency_hist	00:25:01	0
3654394	99	37	34,2	cyclictest	3706879	-21	kworker/u8:3+events_unbound	20:30:23	3
3654389	99	37	34,2	cyclictest	3805088	-21	apt-get	21:35:11	2
3654389	99	37	33,3	cyclictest	3857375	-21	gpgv	22:25:01	2
3654389	99	37	33,2	cyclictest	3726575	-21	/usr/sbin/munin	20:20:22	2
3654394	99	36	29,5	cyclictest	3735783	-21	ntpq	20:25:22	3
3654389	99	36	30,4	cyclictest	3929524	-21	ntpq	23:30:20	2
3654385	99	36	33,2	cyclictest	3700774	-21	kworker/u8:1+flush-259:0	20:55:18	1
3654385	99	36	30,4	cyclictest	3721141	-21	latency_hist	20:15:00	1
3654378	99	36	33,2	cyclictest	3778678	-21	kworker/u8:2+flush-259:0	21:40:01	0
3654394	99	35	33,2	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:20:22	3
3654394	99	35	32,2	cyclictest	3768351	-21	kworker/u8:0+events_unbound	21:50:21	3
3654394	99	35	30,2	cyclictest	3756610	-21	kworker/u8:3+events_unbound	20:50:15	3
3654385	99	35	31,3	cyclictest	3971846	-21	/usr/sbin/munin	00:15:13	1
3654378	99	35	31,3	cyclictest	3778678	-21	kworker/u8:2+flush-259:0	23:35:25	0
3654394	99	34	31,2	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:55:25	3
3654394	99	33	30,2	cyclictest	3909742	-21	kworker/u8:1+events_unbound	23:25:23	3
3654394	99	33	30,2	cyclictest	3700774	-21	kworker/u8:1+events_unbound	20:55:21	3
3654394	99	33	26,5	cyclictest	3858199	-21	diskstats	22:25:13	3
3654394	99	32	28,3	cyclictest	3888723	-21	kworker/u8:3+events_unbound	00:05:14	3
3654394	99	32	27,2	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:49:05	3
3654389	99	32	29,2	cyclictest	3768351	-21	kworker/u8:0+flush-259:0	21:45:01	2
3654389	99	32	26,4	cyclictest	3663720	-21	ntpq	19:15:20	2
3654394	99	31	28,2	cyclictest	3940671	-21	kworker/u8:0+events_unbound	23:55:27	3
3654394	99	31	28,2	cyclictest	3784450	-21	kworker/u8:1+events_unbound	21:15:15	3
3654389	99	31	26,3	cyclictest	3757825	-21	cat	20:50:01	2
3654385	99	31	25,4	cyclictest	3704828	-21	ntpq	19:55:21	1
3654378	99	31	28,2	cyclictest	3981976	-21	kworker/u8:3+flush-259:0	00:30:14	0
3654385	99	30	26,3	cyclictest	3778678	-21	kworker/u8:2+flush-259:0	21:35:24	1
3654378	99	30	25,4	cyclictest	3836968	-21	apt-get	22:05:11	0
3654378	99	30	24,4	cyclictest	3904554	-21	latency_hist	23:09:59	0
3654394	99	29	23,4	cyclictest	3899376	-21	latency_hist	23:05:00	3
3654394	99	29	23,4	cyclictest	252	-21	systemd-journal	22:15:15	3
3654394	99	29	22,5	cyclictest	3831175	-21	cp	22:00:01	3
3654389	99	29	25,3	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:55:19	2
3654378	99	29	25,3	cyclictest	3617017	-21	kworker/u8:0+flush-259:0	19:55:25	0
3654378	99	29	19,9	cyclictest	3606879	-21	kworker/u8:2+flush-259:0	19:40:21	0
3654394	99	28	24,3	cyclictest	3606879	-21	kworker/u8:2+events_unbound	19:19:47	3
3654389	99	28	23,4	cyclictest	3779148	-21	cat	21:10:00	2
3654385	99	28	23,3	cyclictest	3756610	-21	kworker/u8:3+flush-259:0	21:00:17	1
3654385	99	28	23,3	cyclictest	252	-21	systemd-journal	22:21:06	1
3654378	99	28	24,3	cyclictest	3741786	-21	latency_hist	20:35:01	0
3654394	99	27	26,1	cyclictest	3971836	-21	kworker/u8:2+events_unbound	00:35:24	3
3654394	99	27	25,2	cyclictest	3960432	-21	kworker/u8:1+events_unbound	00:15:01	3
3654394	99	27	25,2	cyclictest	3756610	-21	kworker/u8:3+events_unbound	21:25:21	3
3654394	99	27	23,3	cyclictest	3606879	-21	kworker/u8:2+events_unbound	20:08:07	3
3654389	99	27	24,2	cyclictest	3825933	-21	kworker/u8:1+flush-259:0	22:55:26	2
3654389	99	27	22,4	cyclictest	3747366	-21	kworker/u8:2+flush-259:0	20:40:25	2
3654385	99	27	20,5	cyclictest	3689449	-21	ntpq	19:40:21	1
3654378	99	27	22,4	cyclictest	3700547	-21	latency_hist	19:55:02	0
3654394	99	26	23,2	cyclictest	3888723	-21	kworker/u8:3+events_unbound	23:45:24	3
3654385	99	26	21,4	cyclictest	3826149	-21	/usr/sbin/munin	21:55:21	1
3654378	99	26	21,3	cyclictest	3909716	-21	latency_hist	23:15:01	0
3654378	99	26	20,5	cyclictest	252	-21	systemd-journal	00:20:00	0
3654378	99	26	1,24	cyclictest	1	-21	systemd	20:01:07	0
3654394	99	25	22,2	cyclictest	3971836	-21	kworker/u8:2+events_unbound	00:18:26	3
3654394	99	25	22,2	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:11:08	3
3654389	99	25	21,3	cyclictest	3756610	-21	kworker/u8:3+flush-259:0	21:55:17	2
3654389	99	25	19,4	cyclictest	3617017	-21	kworker/u8:0+flush-259:0	19:25:00	2
3654385	99	25	21,3	cyclictest	3757611	-21	gpgv	20:50:00	1
3654385	99	25	19,4	cyclictest	3925209	-21	latency_hist	23:30:01	1
3654394	99	24	21,2	cyclictest	3971836	-21	kworker/u8:2+events_unbound	00:25:27	3
3654394	99	24	21,2	cyclictest	3606879	-21	kworker/u8:2+events_unbound	20:19:06	3
3654394	99	24	19,3	cyclictest	3946057	-21	apt-get	23:50:11	3
3654394	99	24	18,4	cyclictest	3981068	-21	ntpq	00:20:22	3
3654389	99	24	18,4	cyclictest	3767474	-21	ntpq	20:55:22	2
3654385	99	24	17,5	cyclictest	252	-21	systemd-journal	21:50:01	1
3654378	99	24	21,2	cyclictest	3888723	-21	kworker/u8:3+flush-259:0	00:00:21	0
3654378	99	24	19,3	cyclictest	252	-21	systemd-journal	21:00:00	0
3654394	99	23	20,2	cyclictest	3756610	-21	kworker/u8:3+events_unbound	21:06:07	3
3654394	99	23	20,2	cyclictest	3700774	-21	kworker/u8:1+events_unbound	20:20:09	3
3654389	99	23	16,4	cyclictest	3756610	-21	kworker/u8:3+flush-259:0	21:25:19	2
3654378	99	23	20,2	cyclictest	3852184	-21	kworker/u8:3+flush-259:0	22:40:16	0
3654378	99	23	20,2	cyclictest	3700774	-21	kworker/u8:1+flush-259:0	20:05:16	0
3654378	99	23	19,3	cyclictest	3883825	-21	apt-get	22:50:11	0
3654394	99	22	20,2	cyclictest	3700774	-21	kworker/u8:1+events_unbound	20:40:06	3
3654394	99	22	19,2	cyclictest	3825933	-21	kworker/u8:1+events_unbound	22:36:08	3
3654394	99	22	19,2	cyclictest	3706879	-21	kworker/u8:3+events_unbound	20:04:07	3
3654389	99	22	18,3	cyclictest	3617017	-21	kworker/u8:0+events_unbound	19:35:24	2
3654385	99	22	19,2	cyclictest	3700774	-21	kworker/u8:1+flush-259:0	20:25:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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