OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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.
Unexpectedly long latencies may be caused by SMIs
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 rackeslot3s.osadl.org (updated Thu Aug 13, 2026 00:45:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
233782	99	76	26,13	cyclictest	1	-21	systemd	00:40:01	2
233782	99	76	26,13	cyclictest	1	-21	systemd	00:40:01	2
233782	99	74	26,5	cyclictest	290236	-21	latency_hist	22:55:02	2
233782	99	69	21,13	cyclictest	3467602	-21	systemd-journal	21:57:32	2
233773	99	69	24,30	cyclictest	12	-21	ksoftirqd/0	23:58:36	0
233782	99	68	28,4	cyclictest	300936	-21	sh	23:17:28	2
233787	99	67	24,37	cyclictest	302016	-21	sh	23:19:51	3
233787	99	67	20,10	cyclictest	1	-21	systemd	21:40:02	3
233782	99	67	37,26	cyclictest	1	-21	systemd	21:35:00	2
233782	99	67	30,6	cyclictest	326039	-21	latency_hist	00:10:03	2
233787	99	66	29,33	cyclictest	249817	-21	sh	21:30:16	3
233787	99	65	21,40	cyclictest	270965	-21	latency_hist	22:15:01	3
233773	99	65	21,10	cyclictest	13	1	rcu_preempt	00:21:27	0
233787	99	64	24,36	cyclictest	275	-21	dbus-daemon	20:15:00	3
233782	99	64	24,8	cyclictest	270620	-21	sshd	22:14:28	2
233782	99	63	22,10	cyclictest	30	-21	ksoftirqd/2	19:25:41	2
233787	99	62	2,18	cyclictest	321237	-21	systemd	00:00:00	3
233778	99	62	2,8	cyclictest	23	-21	ksoftirqd/1	21:20:01	1
233787	99	61	27,30	cyclictest	1	-21	systemd	23:30:01	3
233787	99	61	24,33	cyclictest	340515	-21	latency_hist	00:40:02	3
233787	99	61	24,33	cyclictest	340515	-21	latency_hist	00:40:01	3
233787	99	61	23,8	cyclictest	37	-21	ksoftirqd/3	21:23:41	3
233787	99	61	23,5	cyclictest	239947	-21	diskmemload	22:49:23	3
233787	99	61	22,11	cyclictest	37	-21	ksoftirqd/3	22:56:36	3
233782	99	61	28,5	cyclictest	284453	-21	sh	22:43:00	2
233782	99	61	28,5	cyclictest	284453	-21	sh	22:43:00	2
233782	99	61	23,7	cyclictest	30	-21	ksoftirqd/2	23:55:04	2
233773	99	61	1,22	cyclictest	168	50	irq/134-8000000	22:40:01	0
233787	99	60	24,4	cyclictest	338048	-21	sh	00:34:55	3
233787	99	60	21,4	cyclictest	275713	-21	latency_hist	22:25:02	3
233787	99	60	21,4	cyclictest	275713	-21	latency_hist	22:25:02	3
233787	99	60	20,5	cyclictest	239947	-21	diskmemload	00:23:09	3
233787	99	60	18,6	cyclictest	37	-21	ksoftirqd/3	00:09:23	3
233782	99	60	23,9	cyclictest	239012	-21	sort	20:50:02	2
233773	99	60	2,50	cyclictest	242445	-21	latency_hist	21:15:02	0
233782	99	59	25,10	cyclictest	298519	-21	sshd	23:12:29	2
233773	99	59	36,18	cyclictest	275	-21	dbus-daemon	23:05:02	0
233773	99	59	26,15	cyclictest	305591	-21	ssh	23:27:03	0
233787	99	58	26,28	cyclictest	281902	-21	sh	22:37:46	3
233787	99	58	25,8	cyclictest	37	-21	ksoftirqd/3	22:41:24	3
233787	99	58	25,8	cyclictest	37	-21	ksoftirqd/3	22:41:24	3
233787	99	58	24,8	cyclictest	37	-21	ksoftirqd/3	23:32:29	3
233787	99	58	21,10	cyclictest	275	-21	dbus-daemon	19:35:01	3
233782	99	58	26,6	cyclictest	238216	-21	latency_hist	20:35:04	2
233773	99	58	29,13	cyclictest	251373	-21	ssh	21:33:48	0
233787	99	57	2,16	cyclictest	237888	-21	unin-run	20:30:01	3
233787	99	57	2,16	cyclictest	237888	-21	unin-run	20:30:01	3
233787	99	57	18,5	cyclictest	235465	-21	latency_hist	19:40:02	3
233787	99	57	13,10	cyclictest	266130	-21	systemd-run	22:05:00	3
233787	99	57	12,10	cyclictest	303795	-21	sshd	23:23:29	3
233782	99	57	24,8	cyclictest	297347	-21	sed	23:10:01	2
233773	99	57	23,16	cyclictest	266148	-21	ssh	22:05:01	0
233787	99	56	3,13	cyclictest	3467602	-21	systemd-journal	20:00:00	3
233787	99	56	25,27	cyclictest	277259	-21	sh	22:28:04	3
233787	99	56	20,4	cyclictest	247343	-21	sh	21:25:08	3
233787	99	56	18,7	cyclictest	233971	-21	/usr/sbin/munin	19:15:01	3
233787	99	56	16,10	cyclictest	275	-21	dbus-daemon	19:45:00	3
233782	99	56	48,5	cyclictest	227253	-21	kworker/2:3	20:10:05	2
233778	99	56	8,6	cyclictest	13	1	rcu_preempt	22:45:29	1
233778	99	56	36,11	cyclictest	23	-21	ksoftirqd/1	23:25:02	1
233773	99	56	28,13	cyclictest	313157	-21	ssh	23:42:50	0
233773	99	56	28,11	cyclictest	263316	-21	ssh	21:59:01	0
233773	99	56	22,30	cyclictest	12	-21	ksoftirqd/0	23:06:39	0
233773	99	56	1,39	cyclictest	335935	-21	rm	00:30:03	0
233778	99	55	36,11	cyclictest	256675	-21	ssh	21:45:00	1
233773	99	55	28,12	cyclictest	335350	-21	ssh	00:29:18	0
233773	99	55	28,12	cyclictest	314748	-21	ssh	23:46:01	0
233773	99	55	1,38	cyclictest	329341	-21	ssh	00:16:35	0
233773	99	55	13,38	cyclictest	13	1	rcu_preempt	21:25:43	0
233773	99	55	11,39	cyclictest	1	-21	systemd	20:35:04	0
233787	99	54	37,13	cyclictest	263694	-21	cron	22:00:01	3
233787	99	54	26,24	cyclictest	323566	-21	sh	00:04:47	3
233787	99	54	23,5	cyclictest	328809	-21	sh	00:15:18	3
233787	99	54	22,13	cyclictest	37	-21	ksoftirqd/3	22:33:36	3
233787	99	54	22,13	cyclictest	37	-21	ksoftirqd/3	22:33:35	3
233787	99	54	17,6	cyclictest	37	-21	ksoftirqd/3	22:54:00	3
233782	99	54	45,5	cyclictest	227253	-21	kworker/2:3	23:26:56	2
233782	99	54	25,8	cyclictest	30	-21	ksoftirqd/2	23:40:04	2
233778	99	54	45,6	cyclictest	23	-21	ksoftirqd/1	23:45:02	1
233773	99	54	44,7	cyclictest	169	50	irq/224-8000000	23:15:01	0
233773	99	54	36,4	cyclictest	168	50	irq/134-8000000	22:45:02	0
233773	99	54	36,4	cyclictest	168	50	irq/134-8000000	22:45:02	0
233773	99	54	28,10	cyclictest	287945	-21	ssh	22:50:06	0
233773	99	54	25,13	cyclictest	323160	-21	ssh	00:03:57	0
233773	99	54	25,13	cyclictest	308201	-21	ssh	23:32:36	0
233773	99	54	2,36	cyclictest	13	1	rcu_preempt	21:43:48	0
233787	99	53	24,5	cyclictest	293444	-21	sh	23:01:44	3
233787	99	53	21,4	cyclictest	239947	-21	diskmemload	22:17:07	3
233787	99	53	13,12	cyclictest	1	-21	systemd	19:50:01	3
233787	99	53	13,12	cyclictest	1	-21	systemd	19:50:01	3
233782	99	53	45,5	cyclictest	263770	-21	kworker/2:1	23:37:32	2
233782	99	53	44,5	cyclictest	227253	-21	kworker/2:3	22:45:33	2
233778	99	53	24,10	cyclictest	23	-21	ksoftirqd/1	00:18:16	1
233773	99	53	27,11	cyclictest	286587	-21	ssh	22:47:26	0
233773	99	53	1,35	cyclictest	12	-21	ksoftirqd/0	19:20:02	0
233787	99	52	21,5	cyclictest	239947	-21	diskmemload	22:05:03	3
233787	99	52	2,15	cyclictest	238412	-21	modprobe	20:40:00	3
233787	99	52	18,7	cyclictest	37	-21	ksoftirqd/3	00:13:55	3
233782	99	52	44,5	cyclictest	237649	-21	kworker/2:2	21:36:26	2
233782	99	52	43,6	cyclictest	263770	-21	kworker/2:1	22:06:13	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:33