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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 Sat Jan 24, 2026 00:45:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3734578	99	99	26,70	cyclictest	12	-21	ksoftirqd/0	20:00:02	0
3734578	99	90	86,2	cyclictest	0	-21	swapper/0	20:05:02	0
3734578	99	89	1,84	cyclictest	0	-21	swapper/0	19:55:01	0
3734578	99	86	1,78	cyclictest	0	-21	swapper/0	20:35:02	0
3734578	99	68	64,2	cyclictest	0	-21	swapper/0	19:25:03	0
3734589	99	66	9,5	cyclictest	13	1	rcu_preempt	21:30:01	2
3734589	99	66	9,5	cyclictest	13	1	rcu_preempt	21:30:01	2
3734589	99	66	13,18	cyclictest	13	1	rcu_preempt	22:00:00	2
3734578	99	66	1,32	cyclictest	12	-21	ksoftirqd/0	00:30:02	0
3734592	99	65	6,9	cyclictest	37	-21	ksoftirqd/3	21:15:01	3
3734585	99	65	8,52	cyclictest	3784026	-21	ssh	22:45:03	1
3734585	99	65	6,8	cyclictest	23	-21	ksoftirqd/1	21:40:00	1
3734585	99	65	23,9	cyclictest	23	-21	ksoftirqd/1	00:30:01	1
3734589	99	64	9,6	cyclictest	13	1	rcu_preempt	22:40:00	2
3734589	99	64	9,6	cyclictest	13	1	rcu_preempt	22:40:00	2
3734589	99	64	12,6	cyclictest	13	1	rcu_preempt	21:40:00	2
3734585	99	64	8,9	cyclictest	23	-21	ksoftirqd/1	00:00:02	1
3734592	99	63	10,6	cyclictest	13	1	rcu_preempt	00:05:01	3
3734592	99	63	10,6	cyclictest	13	1	rcu_preempt	00:05:01	3
3734589	99	63	2,5	cyclictest	13	1	rcu_preempt	21:45:02	2
3734592	99	62	10,6	cyclictest	13	1	rcu_preempt	00:00:02	3
3734589	99	62	10,6	cyclictest	13	1	rcu_preempt	19:20:02	2
3734589	99	62	10,5	cyclictest	13	1	rcu_preempt	23:55:02	2
3734578	99	62	54,5	cyclictest	3734584	-21	grep	19:10:02	0
3734585	99	61	44,13	cyclictest	3467602	-21	systemd-journal	23:40:00	1
3734585	99	61	13,5	cyclictest	13	1	rcu_preempt	21:35:02	1
3734578	99	61	7,6	cyclictest	13	1	rcu_preempt	21:00:00	0
3734578	99	61	2,20	cyclictest	3786195	-21	cat	22:50:01	0
3734578	99	61	1,28	cyclictest	13	1	rcu_preempt	00:10:45	0
3734592	99	60	17,6	cyclictest	13	1	rcu_preempt	00:30:00	3
3734589	99	60	6,6	cyclictest	13	1	rcu_preempt	21:20:00	2
3734585	99	60	22,11	cyclictest	23	-21	ksoftirqd/1	00:40:02	1
3734585	99	60	16,6	cyclictest	13	1	rcu_preempt	23:11:08	1
3734585	99	60	16,11	cyclictest	23	-21	ksoftirqd/1	22:27:20	1
3734585	99	60	16,10	cyclictest	23	-21	ksoftirqd/1	21:50:02	1
3734578	99	60	16,10	cyclictest	13	1	rcu_preempt	21:38:44	0
3734592	99	59	38,16	cyclictest	1	-21	systemd	19:25:02	3
3734592	99	59	18,14	cyclictest	37	-21	ksoftirqd/3	22:55:02	3
3734592	99	59	12,6	cyclictest	13	1	rcu_preempt	21:40:01	3
3734589	99	59	5,5	cyclictest	13	1	rcu_preempt	19:40:02	2
3734589	99	59	1,5	cyclictest	13	1	rcu_preempt	20:50:02	2
3734585	99	59	6,10	cyclictest	23	-21	ksoftirqd/1	00:25:01	1
3734585	99	59	4,8	cyclictest	23	-21	ksoftirqd/1	00:10:00	1
3734585	99	59	14,6	cyclictest	13	1	rcu_preempt	23:28:27	1
3734578	99	59	24,31	cyclictest	12	-21	ksoftirqd/0	22:28:10	0
3734592	99	58	4,6	cyclictest	37	-21	ksoftirqd/3	00:10:01	3
3734592	99	58	32,10	cyclictest	37	-21	ksoftirqd/3	00:15:04	3
3734592	99	58	14,13	cyclictest	37	-21	ksoftirqd/3	23:00:02	3
3734589	99	58	6,6	cyclictest	13	1	rcu_preempt	00:40:01	2
3734589	99	58	18,7	cyclictest	13	1	rcu_preempt	20:00:00	2
3734585	99	58	9,9	cyclictest	23	-21	ksoftirqd/1	00:14:25	1
3734585	99	58	6,9	cyclictest	23	-21	ksoftirqd/1	21:40:27	1
3734585	99	58	15,6	cyclictest	13	1	rcu_preempt	23:00:20	1
3734585	99	58	15,5	cyclictest	13	1	rcu_preempt	00:30:05	1
3734585	99	58	12,5	cyclictest	13	1	rcu_preempt	22:20:03	1
3734578	99	58	28,14	cyclictest	3760965	-21	ssh	21:54:39	0
3734578	99	58	1,23	cyclictest	13	1	rcu_preempt	22:39:20	0
3734578	99	58	1,23	cyclictest	13	1	rcu_preempt	22:39:19	0
3734592	99	57	8,6	cyclictest	13	1	rcu_preempt	23:30:01	3
3734592	99	57	6,5	cyclictest	13	1	rcu_preempt	22:15:00	3
3734592	99	57	4,5	cyclictest	13	1	rcu_preempt	23:10:02	3
3734592	99	57	12,18	cyclictest	13	1	rcu_preempt	23:55:01	3
3734592	99	57	10,6	cyclictest	13	1	rcu_preempt	21:05:01	3
3734589	99	57	9,5	cyclictest	13	1	rcu_preempt	00:10:02	2
3734589	99	57	7,6	cyclictest	13	1	rcu_preempt	19:25:00	2
3734589	99	57	5,6	cyclictest	13	1	rcu_preempt	22:20:02	2
3734589	99	57	3,6	cyclictest	13	1	rcu_preempt	00:05:02	2
3734589	99	57	3,6	cyclictest	13	1	rcu_preempt	00:05:01	2
3734589	99	57	32,10	cyclictest	30	-21	ksoftirqd/2	00:00:00	2
3734589	99	57	11,6	cyclictest	13	1	rcu_preempt	21:23:51	2
3734585	99	57	9,12	cyclictest	23	-21	ksoftirqd/1	22:05:01	1
3734585	99	57	9,12	cyclictest	23	-21	ksoftirqd/1	22:05:01	1
3734585	99	57	7,9	cyclictest	23	-21	ksoftirqd/1	22:41:41	1
3734585	99	57	7,11	cyclictest	23	-21	ksoftirqd/1	00:20:01	1
3734585	99	57	13,6	cyclictest	13	1	rcu_preempt	22:40:02	1
3734585	99	57	13,6	cyclictest	13	1	rcu_preempt	22:40:01	1
3734585	99	57	13,5	cyclictest	13	1	rcu_preempt	21:25:39	1
3734585	99	57	13,5	cyclictest	13	1	rcu_preempt	21:25:38	1
3734585	99	57	11,7	cyclictest	13	1	rcu_preempt	21:10:02	1
3734585	99	57	11,6	cyclictest	13	1	rcu_preempt	23:05:23	1
3734585	99	57	11,5	cyclictest	13	1	rcu_preempt	22:35:01	1
3734585	99	57	11,14	cyclictest	23	-21	ksoftirqd/1	20:05:02	1
3734578	99	57	48,4	cyclictest	12	-21	ksoftirqd/0	22:05:02	0
3734578	99	57	48,4	cyclictest	12	-21	ksoftirqd/0	22:05:01	0
3734578	99	57	2,39	cyclictest	193	50	irq/34-mmc1	23:05:03	0
3734592	99	56	8,6	cyclictest	13	1	rcu_preempt	21:35:01	3
3734592	99	56	26,11	cyclictest	37	-21	ksoftirqd/3	22:50:02	3
3734592	99	56	15,8	cyclictest	37	-21	ksoftirqd/3	22:45:01	3
3734592	99	56	12,6	cyclictest	13	1	rcu_preempt	20:35:02	3
3734592	99	56	12,5	cyclictest	13	1	rcu_preempt	23:00:42	3
3734592	99	56	10,6	cyclictest	13	1	rcu_preempt	20:25:01	3
3734589	99	56	5,6	cyclictest	13	1	rcu_preempt	20:42:08	2
3734589	99	56	5,6	cyclictest	13	1	rcu_preempt	00:25:00	2
3734589	99	56	19,9	cyclictest	30	-21	ksoftirqd/2	00:15:02	2
3734589	99	56	14,11	cyclictest	30	-21	ksoftirqd/2	22:45:01	2
3734585	99	56	9,5	cyclictest	13	1	rcu_preempt	22:14:41	1
3734585	99	56	8,6	cyclictest	13	1	rcu_preempt	21:52:47	1
3734585	99	56	3,9	cyclictest	23	-21	ksoftirqd/1	20:49:07	1
3734585	99	56	18,5	cyclictest	13	1	rcu_preempt	21:18:13	1
3734585	99	56	14,5	cyclictest	13	1	rcu_preempt	21:25:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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