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 Wed May 20, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2550160	99	41	39,1	cyclictest	2773805	-21	fwupd	22:44:05	3
2550156	99	41	37,3	cyclictest	2815366	-21	gpgv	23:25:00	2
2550156	99	41	30,9	cyclictest	2639235	-21	/usr/sbin/munin	20:35:19	2
2550160	99	38	32,4	cyclictest	2670340	-21	diskstats	21:05:14	3
2550156	99	38	33,3	cyclictest	2586403	-21	kworker/u8:2+flush-259:0	19:55:15	2
2550154	99	37	31,4	cyclictest	335557	-21	systemd-journal	20:47:57	1
2550160	99	36	29,5	cyclictest	2731011	-21	ntpq	22:00:23	3
2550154	99	36	32,3	cyclictest	2618581	-21	kworker/u8:2+flush-259:0	20:25:17	1
2550156	99	35	29,4	cyclictest	2591992	-21	cp	19:50:01	2
2550156	99	35	29,4	cyclictest	2591992	-21	cp	19:50:01	2
2550154	99	35	30,3	cyclictest	2711440	-21	kworker/u8:4+flush-259:0	21:50:00	1
2550150	99	34	31,2	cyclictest	2649175	-21	kworker/u8:0+flush-259:0	21:51:03	0
2550150	99	34	30,3	cyclictest	335557	-21	systemd-journal	20:18:57	0
2550154	99	33	27,4	cyclictest	2737657	-21	cp	22:10:01	1
2550154	99	31	26,4	cyclictest	2613198	-21	kworker/u8:1+flush-259:0	20:45:01	1
2550154	99	31	26,3	cyclictest	2597437	-21	base64	19:55:01	1
2550150	99	31	25,4	cyclictest	2825163	-21	ntpq	23:30:20	0
2550156	99	30	25,4	cyclictest	2835474	-21	ntpq	23:40:21	2
2550156	99	30	23,5	cyclictest	2591636	-21	cat	19:50:00	2
2550156	99	30	16,8	cyclictest	2893253	-21	idleruntime-cro	00:40:01	2
2550150	99	30	25,4	cyclictest	2597024	-21	cp	19:55:00	0
2550150	99	30	25,4	cyclictest	2597024	-21	cp	19:54:59	0
2550156	99	29	25,3	cyclictest	2565566	-21	kworker/u8:3+flush-259:0	21:30:01	2
2550154	99	29	23,4	cyclictest	2695696	-21	latency_hist	21:30:01	1
2550156	99	28	21,5	cyclictest	2575874	-21	latency_hist	19:35:01	2
2550154	99	28	25,2	cyclictest	2846343	-21	kworker/u8:1+flush-259:0	23:55:14	1
2550150	99	28	25,2	cyclictest	2862247	-21	kworker/u8:0+flush-259:0	00:15:18	0
2550160	99	27	24,2	cyclictest	2763211	-21	kworker/u8:1+events_unbound	22:55:16	3
2550150	99	27	21,4	cyclictest	2847071	-21	diskstats	23:55:11	0
2550160	99	26	20,4	cyclictest	2841493	-21	latency_hist	23:50:01	3
2550160	99	26	20,4	cyclictest	2706055	-21	latency_hist	21:40:00	3
2550160	99	26	19,5	cyclictest	335557	-21	systemd-journal	22:55:00	3
2550150	99	26	21,4	cyclictest	2618581	-21	kworker/u8:2+flush-259:0	20:20:24	0
2550150	99	26	20,4	cyclictest	335557	-21	systemd-journal	19:44:57	0
2550160	99	25	22,2	cyclictest	2862247	-21	kworker/u8:0+flush-259:0	00:15:01	3
2550160	99	25	21,3	cyclictest	2596942	-21	http	19:55:00	3
2550160	99	25	21,3	cyclictest	2596942	-21	http	19:55:00	3
2550156	99	25	6,17	cyclictest	2618355	-21	awk	20:15:00	2
2550156	99	25	6,17	cyclictest	2618355	-21	awk	20:15:00	2
2550154	99	25	21,3	cyclictest	2618581	-21	kworker/u8:2+events_unbound	20:15:23	1
2550154	99	25	21,2	cyclictest	2726957	-21	kworker/u8:3+events_unbound	00:00:19	1
2550154	99	25	19,4	cyclictest	2877726	-21	latency_hist	00:25:01	1
2550154	99	25	19,4	cyclictest	2721806	-21	apt-get	21:55:11	1
2550150	99	25	21,3	cyclictest	2804628	-21	kworker/u8:0+events_unbound	23:20:14	0
2550150	99	25	21,3	cyclictest	2726957	-21	kworker/u8:3+flush-259:0	22:30:17	0
2550150	99	25	21,3	cyclictest	2711440	-21	kworker/u8:4+events_unbound	21:45:19	0
2550150	99	25	21,3	cyclictest	2649175	-21	kworker/u8:0+events_unbound	21:25:19	0
2550150	99	25	19,4	cyclictest	2675082	-21	systemd-run	21:10:01	0
2550150	99	25	18,5	cyclictest	2752864	-21	latency_hist	22:25:00	0
2550160	99	24	17,5	cyclictest	2825144	-21	ntpq	23:30:21	3
2550160	99	24	17,5	cyclictest	2560435	-21	latency_hist	19:20:00	3
2550154	99	24	21,2	cyclictest	2596927	-21	idleruntime-cro	19:55:00	1
2550154	99	24	21,2	cyclictest	2596927	-21	idleruntime-cro	19:55:00	1
2550150	99	24	20,3	cyclictest	2726957	-21	kworker/u8:3+events_unbound	23:50:21	0
2550160	99	23	19,3	cyclictest	2862247	-21	kworker/u8:0+flush-259:0	00:15:15	3
2550160	99	23	19,3	cyclictest	2851896	-21	kworker/u8:2+flush-259:0	00:25:17	3
2550160	99	23	16,5	cyclictest	2768330	-21	latency_hist	22:40:00	3
2550160	99	23	16,4	cyclictest	335557	-21	systemd-journal	23:01:08	3
2550160	99	23	16,4	cyclictest	2550538	-21	diskstats	19:10:16	3
2550156	99	23	17,4	cyclictest	335557	-21	systemd-journal	00:27:07	2
2550154	99	23	19,3	cyclictest	2804628	-21	kworker/u8:0+events_unbound	23:20:18	1
2550150	99	23	19,3	cyclictest	2851896	-21	kworker/u8:2+events_unbound	00:25:21	0
2550150	99	23	19,3	cyclictest	2784464	-21	kworker/u8:2+events_unbound	23:00:04	0
2550150	99	23	19,3	cyclictest	2565566	-21	kworker/u8:3+events_unbound	20:30:23	0
2550150	99	23	19,3	cyclictest	2565566	-21	kworker/u8:3+events_unbound	19:45:16	0
2550150	99	23	18,3	cyclictest	2768358	-21	gpgv	22:40:00	0
2550156	99	22	13,8	cyclictest	2690528	-21	idleruntime-cro	21:25:01	2
2550154	99	22	18,3	cyclictest	2690539	-21	kworker/u8:1+flush-259:0	22:20:17	1
2550154	99	22	18,3	cyclictest	2586404	-21	kworker/u8:4+events_unbound	19:49:59	1
2550154	99	22	16,4	cyclictest	2585245	-21	ntpq	19:40:20	1
2550150	99	22	19,2	cyclictest	2810089	-21	kworker/u8:1+events_unbound	23:35:15	0
2550150	99	22	17,4	cyclictest	2753105	-21	kworker/u8:2+events_unbound	22:25:18	0
2550150	99	22	15,5	cyclictest	335557	-21	systemd-journal	20:44:56	0
2550160	99	21	17,2	cyclictest	2680194	-21	sh	21:15:00	3
2550160	99	21	14,5	cyclictest	2618348	-21	latency_hist	20:15:01	3
2550160	99	21	14,5	cyclictest	2618348	-21	latency_hist	20:15:00	3
2550156	99	21	14,5	cyclictest	335557	-21	systemd-journal	21:16:02	2
2550154	99	21	17,3	cyclictest	2649175	-21	kworker/u8:0+flush-259:0	21:50:14	1
2550154	99	21	17,2	cyclictest	2851896	-21	kworker/u8:2+events_unbound	00:05:30	1
2550154	99	21	16,4	cyclictest	2564661	-21	ntpq	19:20:19	1
2550154	99	21	0,20	cyclictest	1	-21	systemd	22:05:00	1
2550150	99	21	18,2	cyclictest	2726957	-21	kworker/u8:3+flush-259:0	23:05:21	0
2550150	99	21	18,2	cyclictest	2654459	-21	kworker/u8:2+flush-259:0	21:10:25	0
2550150	99	21	16,4	cyclictest	2654459	-21	kworker/u8:2+flush-259:0	21:40:26	0
2550150	99	21	14,5	cyclictest	2778243	-21	ntpq	22:45:21	0
2550160	99	20	14,5	cyclictest	2574953	-21	ntpq	19:30:19	3
2550156	99	20	17,2	cyclictest	509	-21	rs:main		2
2550156	99	20	14,4	cyclictest	2737876	-21	diskstats	22:10:13	2
2550156	99	20	14,4	cyclictest	2664757	-21	latency_hist	21:00:01	2
2550154	99	20	17,2	cyclictest	2773570	-21	kworker/u8:0+flush-259:0	22:50:27	1
2550154	99	20	17,2	cyclictest	2763211	-21	kworker/u8:1+flush-259:0	22:55:18	1
2550154	99	20	16,3	cyclictest	2810089	-21	kworker/u8:1+flush-259:0	23:30:21	1
2550154	99	20	16,3	cyclictest	2726957	-21	kworker/u8:3+flush-259:0	23:15:05	1
2550154	99	20	16,3	cyclictest	2565566	-21	kworker/u8:3+flush-259:0	19:25:20	1
2550154	99	20	14,5	cyclictest	2819939	-21	ntpq	23:25:21	1
2550150	99	20	17,2	cyclictest	2726397	-21	kworker/u8:2+flush-259:0	22:08:08	0
2550150	99	20	16,3	cyclictest	2763211	-21	kworker/u8:1+events_unbound	23:11:07	0
2550150	99	20	16,3	cyclictest	2613198	-21	kworker/u8:1+events_unbound	20:35:18	0
2550150	99	20	16,3	cyclictest	2602714	-21	kworker/u8:4+events_unbound	20:05:00	0
2550150	99	20	16,3	cyclictest	2565566	-21	kworker/u8:3+events_unbound	21:30:04	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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