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 Wed Apr 15, 2026 00:45:30)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3817122	99	72	8,4	cyclictest	13	1	rcu_preempt	23:20:02	3
3817122	99	71	8,20	cyclictest	3834895	-21	ssh	21:36:31	3
3817122	99	71	8,20	cyclictest	3834895	-21	ssh	21:36:31	3
3817122	99	71	7,27	cyclictest	3871001	-21	latency_hist	23:00:02	3
3817122	99	71	7,27	cyclictest	3871001	-21	latency_hist	23:00:02	3
3817112	99	71	27,8	cyclictest	3879448	-21	kworker/0:2	23:23:05	0
3817122	99	70	12,21	cyclictest	3911922	-21	systemd-run	00:35:01	3
3817122	99	69	19,13	cyclictest	3889233	-21	ssh	23:42:27	3
3817122	99	68	18,16	cyclictest	3849325	-21	latency_hist	22:10:02	3
3817122	99	68	11,16	cyclictest	3903789	-21	ssh	00:15:54	3
3817122	99	67	18,14	cyclictest	3856057	-21	ssh	22:25:18	3
3817122	99	67	10,21	cyclictest	3829042	-21	ssh	21:23:08	3
3817122	99	66	18,11	cyclictest	37	-21	ksoftirqd/3	00:29:40	3
3817122	99	66	11,17	cyclictest	3832460	-21	ssh	21:30:50	3
3817122	99	65	10,21	cyclictest	3847057	-21	ssh	22:04:55	3
3817122	99	64	18,11	cyclictest	37	-21	ksoftirqd/3	23:39:59	3
3817122	99	64	16,10	cyclictest	37	-21	ksoftirqd/3	23:28:42	3
3817122	99	63	17,8	cyclictest	37	-21	ksoftirqd/3	23:32:38	3
3817122	99	63	16,9	cyclictest	37	-21	ksoftirqd/3	00:04:28	3
3817122	99	63	10,16	cyclictest	3894758	-21	ssh	23:55:07	3
3817122	99	62	19,8	cyclictest	3854311	-21	ssh	22:21:25	3
3817122	99	62	19,8	cyclictest	3854311	-21	ssh	22:21:25	3
3817122	99	62	13,11	cyclictest	37	-21	ksoftirqd/3	21:19:47	3
3817122	99	61	8,16	cyclictest	3839237	-21	ssh	21:46:28	3
3817122	99	61	8,14	cyclictest	3892046	-21	ssh	23:49:14	3
3817122	99	61	16,14	cyclictest	3877263	-21	ssh	23:15:00	3
3817122	99	61	15,9	cyclictest	37	-21	ksoftirqd/3	22:49:39	3
3817122	99	60	8,16	cyclictest	3913753	-21	ssh	00:39:11	3
3817122	99	60	17,8	cyclictest	37	-21	ksoftirqd/3	22:39:34	3
3817122	99	60	16,9	cyclictest	37	-21	ksoftirqd/3	23:23:26	3
3817122	99	60	16,9	cyclictest	37	-21	ksoftirqd/3	00:11:22	3
3817122	99	60	15,10	cyclictest	37	-21	ksoftirqd/3	23:08:29	3
3817122	99	60	15,10	cyclictest	37	-21	ksoftirqd/3	22:17:11	3
3817122	99	60	14,10	cyclictest	37	-21	ksoftirqd/3	22:31:14	3
3817122	99	60	14,10	cyclictest	37	-21	ksoftirqd/3	22:31:14	3
3817122	99	60	14,10	cyclictest	37	-21	ksoftirqd/3	00:20:20	3
3817122	99	60	14,10	cyclictest	37	-21	ksoftirqd/3	00:20:20	3
3817122	99	60	10,14	cyclictest	3868592	-21	ssh	22:54:51	3
3817112	99	60	21,33	cyclictest	275	-21	dbus-daemon	00:00:00	0
3817122	99	59	15,8	cyclictest	37	-21	ksoftirqd/3	22:10:54	3
3817122	99	58	36,16	cyclictest	3467602	-21	systemd-journal	22:00:00	3
3817122	99	58	36,16	cyclictest	3467602	-21	systemd-journal	22:00:00	3
3817122	99	58	15,9	cyclictest	37	-21	ksoftirqd/3	22:42:02	3
3817122	99	58	15,9	cyclictest	37	-21	ksoftirqd/3	22:42:02	3
3817122	99	58	15,10	cyclictest	37	-21	ksoftirqd/3	21:50:08	3
3817117	99	58	40,7	cyclictest	3821463	-21	kworker/2:1	21:37:07	2
3817117	99	58	40,7	cyclictest	3821463	-21	kworker/2:1	21:37:07	2
3817122	99	57	17,7	cyclictest	37	-21	ksoftirqd/3	23:50:24	3
3817122	99	57	16,7	cyclictest	37	-21	ksoftirqd/3	21:42:49	3
3817122	99	57	15,7	cyclictest	37	-21	ksoftirqd/3	21:11:01	3
3817122	99	57	15,11	cyclictest	37	-21	ksoftirqd/3	21:29:04	3
3817122	99	57	15,11	cyclictest	37	-21	ksoftirqd/3	21:29:04	3
3817117	99	57	43,10	cyclictest	3864366	-21	kworker/2:0	00:05:22	2
3817117	99	57	37,16	cyclictest	1	-21	systemd	19:25:01	2
3817112	99	57	3,27	cyclictest	13	1	rcu_preempt	23:36:27	0
3817112	99	57	26,15	cyclictest	3873202	-21	ssh	23:05:03	0
3817112	99	57	18,34	cyclictest	275	-21	dbus-daemon	22:50:00	0
3817117	99	56	48,5	cyclictest	3821463	-21	kworker/2:1	00:31:12	2
3817117	99	56	35,16	cyclictest	1	-21	systemd	21:50:01	2
3817112	99	56	4,28	cyclictest	13	1	rcu_preempt	21:14:42	0
3817112	99	56	38,14	cyclictest	1	-21	systemd	23:20:01	0
3817112	99	56	29,11	cyclictest	3913639	-21	ssh	00:38:54	0
3817112	99	56	29,11	cyclictest	3850190	-21	ssh	22:11:55	0
3817112	99	56	28,13	cyclictest	3852704	-21	ssh	22:17:51	0
3817112	99	56	1,27	cyclictest	13	1	rcu_preempt	22:32:35	0
3817112	99	56	1,27	cyclictest	13	1	rcu_preempt	22:32:35	0
3817117	99	55	46,6	cyclictest	3864366	-21	kworker/2:0	23:01:52	2
3817117	99	55	45,8	cyclictest	29	1	rcuc/2	22:50:01	2
3817114	99	55	37,14	cyclictest	275	-21	dbus-daemon	23:59:59	1
3817112	99	55	20,17	cyclictest	168	50	irq/134-8000000	21:40:23	0
3817112	99	55	19,18	cyclictest	168	50	irq/134-8000000	23:54:15	0
3817112	99	55	18,6	cyclictest	168	50	irq/134-8000000	23:45:25	0
3817112	99	55	18,6	cyclictest	168	50	irq/134-8000000	23:02:15	0
3817112	99	55	18,19	cyclictest	168	50	irq/134-8000000	00:14:42	0
3817112	99	55	1,27	cyclictest	13	1	rcu_preempt	00:23:43	0
3817112	99	55	1,27	cyclictest	13	1	rcu_preempt	00:23:43	0
3817122	99	54	5,14	cyclictest	3823274	-21	diskmemload	23:04:03	3
3817117	99	54	45,6	cyclictest	3807074	-21	kworker/2:2	21:00:02	2
3817117	99	54	45,5	cyclictest	3821463	-21	kworker/2:1	23:22:33	2
3817117	99	54	43,6	cyclictest	3807074	-21	kworker/2:2	21:25:00	2
3817112	99	54	27,12	cyclictest	3855244	-21	ssh	22:23:55	0
3817112	99	54	27,12	cyclictest	3855244	-21	ssh	22:23:55	0
3817112	99	54	2,4	cyclictest	13	1	rcu_preempt	23:32:55	0
3817112	99	54	24,15	cyclictest	3857384	-21	ssh	22:28:50	0
3817112	99	54	19,18	cyclictest	168	50	irq/134-8000000	21:21:55	0
3817112	99	54	19,17	cyclictest	168	50	irq/134-8000000	21:58:27	0
3817112	99	54	19,17	cyclictest	168	50	irq/134-8000000	21:58:27	0
3817112	99	54	19,17	cyclictest	168	50	irq/134-8000000	00:02:15	0
3817112	99	54	18,18	cyclictest	168	50	irq/134-8000000	00:09:33	0
3817112	99	54	17,7	cyclictest	168	50	irq/134-8000000	00:32:31	0
3817122	99	53	9,15	cyclictest	3819816	-21	cat	20:00:03	3
3817122	99	53	15,7	cyclictest	37	-21	ksoftirqd/3	00:09:48	3
3817122	99	53	13,23	cyclictest	37	-21	ksoftirqd/3	20:35:02	3
3817117	99	53	45,5	cyclictest	3821463	-21	kworker/2:1	23:33:17	2
3817117	99	53	44,6	cyclictest	3821463	-21	kworker/2:1	23:48:57	2
3817117	99	53	44,6	cyclictest	3821463	-21	kworker/2:1	23:37:45	2
3817112	99	53	24,3	cyclictest	13	1	rcu_preempt	21:45:36	0
3817112	99	53	19,17	cyclictest	168	50	irq/134-8000000	23:14:17	0
3817112	99	53	19,17	cyclictest	168	50	irq/134-8000000	22:03:09	0
3817112	99	53	18,17	cyclictest	168	50	irq/134-8000000	22:54:03	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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