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 Sat Jun 13, 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
3485887	99	47	42,4	cyclictest	335557	-21	systemd-journal	09:05:00	0
3485898	99	44	40,3	cyclictest	3432849	-21	kworker/u8:1+flush-259:0	07:35:00	3
3485887	99	41	34,5	cyclictest	3757605	-21	ntpq	11:25:20	0
3485898	99	40	34,4	cyclictest	3543040	-21	apt-get	08:05:01	3
3485891	99	40	21,14	cyclictest	3800228	-21	latency_hist	12:10:00	1
3485895	99	39	36,2	cyclictest	3553404	-21	kworker/u8:1+events_unbound	09:00:24	2
3485898	99	37	31,4	cyclictest	3616908	-21	cp	09:14:59	3
3485887	99	37	31,4	cyclictest	335557	-21	systemd-journal	07:32:33	0
3485898	99	36	31,3	cyclictest	3701368	-21	kworker/u8:0+flush-259:0	11:20:15	3
3485895	99	36	30,4	cyclictest	3623045	-21	kworker/u8:1+flush-259:0	10:40:17	2
3485887	99	35	30,4	cyclictest	3727176	-21	apt-get	11:00:00	0
3485898	99	34	29,3	cyclictest	3643639	-21	kworker/u8:2+flush-259:0	09:40:16	3
3485895	99	33	29,3	cyclictest	3643639	-21	kworker/u8:2+flush-259:0	09:40:13	2
3485895	99	33	27,4	cyclictest	3622545	-21	cat	09:20:00	2
3485887	99	33	28,4	cyclictest	3543044	-21	latency_hist	08:05:01	0
3485898	99	32	26,4	cyclictest	335557	-21	systemd-journal	10:45:25	3
3485895	99	32	29,2	cyclictest	3805414	-21	kworker/u8:2+flush-259:0	12:35:01	2
3485895	99	32	29,2	cyclictest	3432849	-21	kworker/u8:1+flush-259:0	07:35:17	2
3485898	99	31	25,4	cyclictest	3616809	-21	apt-get	09:15:00	3
3485891	99	31	24,5	cyclictest	3820416	-21	ntpq	12:25:21	1
3485887	99	31	26,4	cyclictest	3799318	-21	ntpq	12:05:20	0
3485887	99	31	26,4	cyclictest	3663084	-21	ntpq	09:55:20	0
3485895	99	30	24,4	cyclictest	3758528	-21	apt-get	11:29:59	2
3485891	99	30	22,7	cyclictest	3685767	-21	apt-get	10:20:12	1
3485898	99	29	22,5	cyclictest	3810558	-21	latency_hist	12:20:01	3
3485898	99	28	23,3	cyclictest	3553404	-21	kworker/u8:1+flush-259:0	08:50:01	3
3485895	99	28	24,3	cyclictest	3686059	-21	kworker/u8:2+events_unbound	10:25:02	2
3485891	99	28	24,3	cyclictest	3485734	-21	kworker/u8:2+flush-259:0	07:25:00	1
3485891	99	28	24,3	cyclictest	3485734	-21	kworker/u8:2+flush-259:0	07:25:00	1
3485891	99	28	22,4	cyclictest	335557	-21	systemd-journal	12:00:52	1
3485898	99	27	21,4	cyclictest	3601237	-21	latency_hist	09:00:00	3
3485895	99	27	23,3	cyclictest	3517210	-21	kworker/u8:3+flush-259:0	07:45:00	2
3485895	99	27	21,4	cyclictest	335557	-21	systemd-journal	08:10:19	2
3485891	99	27	21,4	cyclictest	335557	-21	systemd-journal	07:16:32	1
3485891	99	27	20,5	cyclictest	3590606	-21	cp	08:50:01	1
3485887	99	27	23,3	cyclictest	3768887	-21	kworker/u8:2+flush-259:0	11:45:26	0
3485887	99	27	23,3	cyclictest	3691272	-21	base64	10:25:01	0
3485895	99	26	23,2	cyclictest	3701576	-21	kworker/u8:4+events_unbound	11:05:01	2
3485895	99	26	22,3	cyclictest	3537916	-21	kworker/u8:3+events_unbound	08:25:23	2
3485891	99	26	20,4	cyclictest	3769522	-21	apt-get	11:40:12	1
3485887	99	26	23,2	cyclictest	3606389	-21	kworker/u8:2+flush-259:0	09:10:00	0
3485898	99	25	20,4	cyclictest	3432849	-21	kworker/u8:1+flush-259:0	07:15:00	3
3485895	99	25	19,4	cyclictest	3784785	-21	latency_hist	11:55:01	2
3485891	99	25	21,3	cyclictest	3653939	-21	kworker/u8:3+flush-259:0	10:25:21	1
3485887	99	25	22,2	cyclictest	3606390	-21	kworker/u8:4+flush-259:0	09:25:24	0
3485887	99	25	21,3	cyclictest	3485734	-21	kworker/u8:2+flush-259:0	07:24:38	0
3485887	99	25	21,3	cyclictest	3485734	-21	kworker/u8:2+flush-259:0	07:24:37	0
3485898	99	24	18,4	cyclictest	3575152	-21	apt-get	08:35:11	3
3485895	99	24	19,4	cyclictest	3606390	-21	kworker/u8:4+flush-259:0	10:05:17	2
3485891	99	24	19,3	cyclictest	3769260	-21	latency_hist	11:40:01	1
3485887	99	24	20,3	cyclictest	335557	-21	systemd-journal	07:43:32	0
3485887	99	24	18,4	cyclictest	3623084	-21	apt-get	09:20:12	0
3485887	99	24	18,4	cyclictest	335557	-21	systemd-journal	12:27:33	0
3485898	99	23	19,3	cyclictest	3758548	-21	kworker/u8:1+flush-259:0	11:49:59	3
3485898	99	23	17,4	cyclictest	3685508	-21	latency_hist	10:20:01	3
3485895	99	23	19,3	cyclictest	3553404	-21	kworker/u8:1+events_unbound	08:23:34	2
3485895	99	23	18,4	cyclictest	3606639	-21	apt-get	09:05:13	2
3485891	99	23	17,4	cyclictest	3674729	-21	apt-get	10:10:00	1
3485887	99	23	20,2	cyclictest	3653939	-21	kworker/u8:3+events_unbound	10:30:12	0
3485887	99	23	20,2	cyclictest	3606390	-21	kworker/u8:4+flush-259:0	09:50:01	0
3485887	99	23	20,2	cyclictest	3432849	-21	kworker/u8:1+flush-259:0	07:10:23	0
3485887	99	23	20,2	cyclictest	1	-21	systemd	09:36:32	0
3485887	99	23	19,3	cyclictest	3606390	-21	kworker/u8:4+events_unbound	10:10:21	0
3485887	99	23	18,3	cyclictest	335557	-21	systemd-journal	11:15:00	0
3485898	99	22	18,3	cyclictest	3717119	-21	apt-get	10:50:12	3
3485895	99	22	19,3	cyclictest	3432849	-21	kworker/u8:1+events_unbound	07:34:59	2
3485895	99	22	19,2	cyclictest	3653939	-21	kworker/u8:3+flush-259:0	10:15:21	2
3485895	99	22	18,3	cyclictest	3779669	-21	kworker/u8:0+events_unbound	12:28:32	2
3485895	99	22	18,3	cyclictest	3606390	-21	kworker/u8:4+events_unbound	09:30:10	2
3485895	99	22	17,4	cyclictest	335557	-21	systemd-journal	07:25:32	2
3485891	99	22	16,4	cyclictest	3675419	-21	apt-get	10:10:11	1
3485887	99	22	19,2	cyclictest	3805621	-21	kworker/u8:3+events_unbound	12:15:20	0
3485887	99	22	19,2	cyclictest	3805414	-21	kworker/u8:2+flush-259:0	12:35:23	0
3485887	99	22	19,2	cyclictest	3758548	-21	kworker/u8:1+events_unbound	11:30:22	0
3485887	99	22	18,2	cyclictest	335557	-21	systemd-journal	08:40:00	0
3485898	99	21	17,3	cyclictest	3701576	-21	kworker/u8:4+flush-259:0	10:40:24	3
3485898	99	21	17,3	cyclictest	3653939	-21	kworker/u8:3+flush-259:0	10:20:25	3
3485895	99	21	18,3	cyclictest	3758548	-21	kworker/u8:1+events_unbound	11:58:32	2
3485895	99	21	17,3	cyclictest	3701576	-21	kworker/u8:4+events_unbound	10:46:34	2
3485895	99	21	17,3	cyclictest	3585242	-21	kworker/u8:0+events_unbound	08:45:22	2
3485895	99	21	17,3	cyclictest	3544135	-21	kworker/u8:0+events_unbound	08:15:22	2
3485895	99	21	17,3	cyclictest	3485734	-21	kworker/u8:2+events_unbound	08:01:33	2
3485895	99	21	15,4	cyclictest	335557	-21	systemd-journal	11:21:32	2
3485895	99	21	15,4	cyclictest	335557	-21	systemd-journal	08:05:18	2
3485891	99	21	18,2	cyclictest	3800492	-21	apt-get	12:10:12	1
3485891	99	21	18,2	cyclictest	3800492	-21	apt-get	12:10:11	1
3485891	99	21	15,4	cyclictest	3554064	-21	apt-get	08:15:11	1
3485887	99	21	18,2	cyclictest	3553404	-21	kworker/u8:1+flush-259:0	08:55:21	0
3485887	99	21	17,3	cyclictest	3805621	-21	kworker/u8:3+events_unbound	12:20:20	0
3485887	99	21	17,3	cyclictest	3748262	-21	kworker/u8:2+flush-259:0	11:20:52	0
3485887	99	21	17,3	cyclictest	3553404	-21	kworker/u8:1+events_unbound	08:40:26	0
3485887	99	21	15,5	cyclictest	3727176	-21	apt-get	11:00:01	0
3485898	99	20	15,3	cyclictest	335557	-21	systemd-journal	11:55:51	3
3485898	99	20	13,4	cyclictest	3815242	-21	ntpq	12:20:20	3
3485895	99	20	17,2	cyclictest	3795297	-21	kworker/u8:4+flush-259:0	12:15:53	2
3485895	99	20	17,2	cyclictest	3779669	-21	kworker/u8:0+flush-259:0	12:35:20	2
3485895	99	20	16,3	cyclictest	3701368	-21	kworker/u8:0+flush-259:0	11:15:33	2
3485895	99	20	16,3	cyclictest	3653939	-21	kworker/u8:3+flush-259:0	10:20:15	2
3485895	99	20	16,3	cyclictest	3643639	-21	kworker/u8:2+events_unbound	09:45:23	2
3485895	99	20	16,3	cyclictest	3506536	-21	kworker/u8:0+events_unbound	07:45:03	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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