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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 Feb 05, 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
3284884	99	113	17,51	cyclictest	13	1	rcu_preempt	22:55:00	0
3284897	99	103	13,61	cyclictest	3271115	-21	munin-node	23:00:03	3
3284897	99	103	13,61	cyclictest	3271115	-21	munin-node	23:00:02	3
3284893	99	101	13,83	cyclictest	3350283	-21	ssh	23:20:02	2
3284884	99	76	6,8	cyclictest	12	1	ksoftirqd/0	22:10:01	0
3284884	99	76	2,71	cyclictest	0	-21	swapper/0	22:05:02	0
3284884	99	72	32,36	cyclictest	12	-21	ksoftirqd/0	23:25:00	0
3284884	99	68	3,9	cyclictest	12	1	ksoftirqd/0	21:40:01	0
3284884	99	68	3,9	cyclictest	12	1	ksoftirqd/0	21:40:01	0
3284884	99	68	1,9	cyclictest	12	1	ksoftirqd/0	23:50:03	0
3284884	99	68	1,42	cyclictest	13	1	rcu_preempt	00:04:03	0
3284889	99	67	48,9	cyclictest	23	-21	ksoftirqd/1	19:50:00	1
3284889	99	66	15,12	cyclictest	23	-21	ksoftirqd/1	20:00:00	1
3284893	99	65	5,45	cyclictest	3318320	-21	ssh	22:10:02	2
3284889	99	65	13,17	cyclictest	23	-21	ksoftirqd/1	21:50:02	1
3284884	99	65	11,5	cyclictest	13	1	rcu_preempt	22:15:00	0
3284884	99	65	11,5	cyclictest	13	1	rcu_preempt	22:15:00	0
3284884	99	64	9,44	cyclictest	13	1	rcu_preempt	23:20:03	0
3284884	99	64	3,43	cyclictest	13	1	rcu_preempt	00:06:45	0
3284884	99	64	30,12	cyclictest	12	-21	ksoftirqd/0	21:43:04	0
3284884	99	64	2,9	cyclictest	12	1	ksoftirqd/0	23:35:03	0
3284884	99	64	2,9	cyclictest	12	1	ksoftirqd/0	23:35:02	0
3284884	99	64	1,4	cyclictest	13	1	rcu_preempt	23:49:13	0
3284889	99	63	10,5	cyclictest	13	1	rcu_preempt	21:45:00	1
3284884	99	63	5,30	cyclictest	13	1	rcu_preempt	21:20:47	0
3284884	99	63	15,5	cyclictest	13	1	rcu_preempt	20:00:00	0
3284897	99	62	2,21	cyclictest	37	-21	ksoftirqd/3	22:00:02	3
3284893	99	61	4,11	cyclictest	30	-21	ksoftirqd/2	23:00:00	2
3284893	99	61	4,11	cyclictest	30	-21	ksoftirqd/2	23:00:00	2
3284893	99	61	20,6	cyclictest	13	1	rcu_preempt	23:10:32	2
3284884	99	61	16,15	cyclictest	13	1	rcu_preempt	21:34:25	0
3284884	99	61	13,5	cyclictest	13	1	rcu_preempt	23:39:59	0
3284889	99	60	6,9	cyclictest	23	-21	ksoftirqd/1	22:02:08	1
3284889	99	60	17,11	cyclictest	23	-21	ksoftirqd/1	23:56:06	1
3284884	99	60	55,3	cyclictest	0	-21	swapper/0	19:30:02	0
3284884	99	60	55,3	cyclictest	0	-21	swapper/0	19:30:02	0
3284884	99	60	49,6	cyclictest	12	-21	ksoftirqd/0	00:15:02	0
3284884	99	60	32,14	cyclictest	3331803	-21	ssh	22:39:49	0
3284889	99	59	14,9	cyclictest	23	-21	ksoftirqd/1	23:25:01	1
3284889	99	59	13,5	cyclictest	13	1	rcu_preempt	23:47:40	1
3284893	99	58	5,8	cyclictest	30	-21	ksoftirqd/2	00:40:03	2
3284889	99	58	7,13	cyclictest	23	-21	ksoftirqd/1	00:40:02	1
3284889	99	58	5,11	cyclictest	23	-21	ksoftirqd/1	22:43:27	1
3284889	99	58	16,6	cyclictest	13	1	rcu_preempt	21:19:58	1
3284889	99	58	14,6	cyclictest	13	1	rcu_preempt	21:15:00	1
3284889	99	58	12,6	cyclictest	13	1	rcu_preempt	19:55:00	1
3284884	99	58	48,8	cyclictest	15	1	rcuc/0	20:50:02	0
3284893	99	57	11,6	cyclictest	13	1	rcu_preempt	23:35:02	2
3284893	99	57	11,6	cyclictest	13	1	rcu_preempt	23:35:02	2
3284889	99	57	7,9	cyclictest	23	-21	ksoftirqd/1	22:15:00	1
3284889	99	57	7,9	cyclictest	23	-21	ksoftirqd/1	22:15:00	1
3284889	99	57	6,12	cyclictest	23	-21	ksoftirqd/1	20:20:01	1
3284889	99	57	5,8	cyclictest	23	-21	ksoftirqd/1	22:50:01	1
3284889	99	57	5,10	cyclictest	23	-21	ksoftirqd/1	21:35:02	1
3284889	99	57	5,10	cyclictest	23	-21	ksoftirqd/1	21:35:02	1
3284889	99	57	4,10	cyclictest	23	-21	ksoftirqd/1	23:44:34	1
3284889	99	57	4,10	cyclictest	23	-21	ksoftirqd/1	00:30:09	1
3284889	99	57	18,9	cyclictest	23	-21	ksoftirqd/1	21:10:01	1
3284889	99	57	12,6	cyclictest	13	1	rcu_preempt	00:20:01	1
3284889	99	57	10,6	cyclictest	13	1	rcu_preempt	23:10:00	1
3284884	99	57	4,37	cyclictest	12	-21	ksoftirqd/0	21:56:57	0
3284884	99	57	3,5	cyclictest	13	1	rcu_preempt	23:10:01	0
3284884	99	57	10,6	cyclictest	13	1	rcu_preempt	23:00:01	0
3284884	99	57	10,6	cyclictest	13	1	rcu_preempt	23:00:01	0
3284884	99	57	10,6	cyclictest	13	1	rcu_preempt	20:25:02	0
3284893	99	56	33,18	cyclictest	275	-21	dbus-daemon	20:45:00	2
3284889	99	56	9,6	cyclictest	13	1	rcu_preempt	00:05:01	1
3284889	99	56	8,10	cyclictest	23	-21	ksoftirqd/1	21:25:00	1
3284889	99	56	7,12	cyclictest	23	-21	ksoftirqd/1	22:32:07	1
3284889	99	56	7,12	cyclictest	23	-21	ksoftirqd/1	22:32:06	1
3284889	99	56	10,5	cyclictest	13	1	rcu_preempt	22:38:32	1
3284884	99	56	27,13	cyclictest	3378202	-21	ssh	00:21:58	0
3284884	99	56	26,14	cyclictest	3325126	-21	ssh	22:25:02	0
3284884	99	56	23,15	cyclictest	3309396	-21	ssh	21:50:02	0
3284884	99	56	17,34	cyclictest	168	50	irq/134-8000000	21:15:57	0
3284889	99	55	7,8	cyclictest	23	-21	ksoftirqd/1	21:30:01	1
3284889	99	55	7,8	cyclictest	23	-21	ksoftirqd/1	21:30:00	1
3284889	99	55	6,10	cyclictest	23	-21	ksoftirqd/1	00:21:48	1
3284889	99	55	4,12	cyclictest	23	-21	ksoftirqd/1	23:20:00	1
3284889	99	55	14,5	cyclictest	13	1	rcu_preempt	20:15:02	1
3284889	99	55	11,6	cyclictest	13	1	rcu_preempt	22:58:12	1
3284889	99	55	11,6	cyclictest	13	1	rcu_preempt	22:58:12	1
3284889	99	55	11,6	cyclictest	13	1	rcu_preempt	22:18:56	1
3284889	99	55	10,5	cyclictest	13	1	rcu_preempt	23:03:32	1
3284884	99	55	43,10	cyclictest	15	1	rcuc/0	22:35:03	0
3284884	99	55	43,10	cyclictest	15	1	rcuc/0	22:35:02	0
3284884	99	55	12,5	cyclictest	13	1	rcu_preempt	00:38:47	0
3284897	99	54	35,13	cyclictest	3467602	-21	systemd-journal	21:20:00	3
3284893	99	54	46,4	cyclictest	3285093	-21	kworker/2:0	22:30:00	2
3284889	99	54	8,13	cyclictest	23	-21	ksoftirqd/1	19:40:00	1
3284889	99	54	6,7	cyclictest	13	1	rcu_preempt	23:35:02	1
3284889	99	54	6,7	cyclictest	13	1	rcu_preempt	23:35:02	1
3284889	99	54	5,9	cyclictest	23	-21	ksoftirqd/1	20:25:00	1
3284889	99	54	4,14	cyclictest	23	-21	ksoftirqd/1	20:30:00	1
3284889	99	54	15,5	cyclictest	13	1	rcu_preempt	21:32:26	1
3284889	99	54	14,6	cyclictest	13	1	rcu_preempt	00:15:01	1
3284889	99	54	11,6	cyclictest	13	1	rcu_preempt	19:15:02	1
3284889	99	54	11,6	cyclictest	13	1	rcu_preempt	19:15:02	1
3284889	99	54	10,5	cyclictest	13	1	rcu_preempt	23:13:32	1
3284884	99	54	15,6	cyclictest	13	1	rcu_preempt	23:30:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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