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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
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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 rackeslot3s.osadl.org (updated Mon Nov 24, 2025 00:45:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4011963	99	96	1,3	cyclictest	0	-21	swapper/0	23:15:02	0
4011963	99	92	83,4	cyclictest	0	-21	swapper/0	21:15:01	0
4011968	99	71	22,10	cyclictest	23	-21	ksoftirqd/1	20:55:01	1
4011968	99	67	7,22	cyclictest	4012846	-21	cut	19:25:03	1
4011977	99	64	2,10	cyclictest	37	-21	ksoftirqd/3	21:50:00	3
4011973	99	63	4,6	cyclictest	13	1	rcu_preempt	22:15:00	2
4011973	99	62	16,12	cyclictest	30	-21	ksoftirqd/2	00:00:00	2
4011973	99	62	16,12	cyclictest	30	-21	ksoftirqd/2	00:00:00	2
4011968	99	62	9,15	cyclictest	4026459	-21	cut	23:45:02	1
4011968	99	62	16,8	cyclictest	23	-21	ksoftirqd/1	00:10:00	1
4011968	99	62	15,8	cyclictest	23	-21	ksoftirqd/1	23:50:01	1
4011968	99	61	16,9	cyclictest	23	-21	ksoftirqd/1	19:10:01	1
4011968	99	61	15,10	cyclictest	23	-21	ksoftirqd/1	20:25:02	1
4011977	99	60	8,15	cyclictest	37	-21	ksoftirqd/3	00:00:00	3
4011977	99	60	8,15	cyclictest	37	-21	ksoftirqd/3	00:00:00	3
4011968	99	60	17,9	cyclictest	23	-21	ksoftirqd/1	22:35:00	1
4011968	99	60	17,9	cyclictest	23	-21	ksoftirqd/1	22:35:00	1
4011968	99	60	10,17	cyclictest	4024832	-21	latency_hist	23:15:02	1
4011977	99	59	11,5	cyclictest	13	1	rcu_preempt	20:55:01	3
4011968	99	59	17,9	cyclictest	23	-21	ksoftirqd/1	21:00:00	1
4011968	99	59	17,9	cyclictest	23	-21	ksoftirqd/1	21:00:00	1
4011968	99	59	15,9	cyclictest	23	-21	ksoftirqd/1	20:50:02	1
4011968	99	59	15,10	cyclictest	23	-21	ksoftirqd/1	19:55:02	1
4011973	99	58	3,7	cyclictest	30	-21	ksoftirqd/2	00:25:00	2
4011968	99	58	8,16	cyclictest	4027797	-21	latency_hist	00:15:02	1
4011968	99	58	8,16	cyclictest	4027797	-21	latency_hist	00:15:02	1
4011968	99	58	8,13	cyclictest	4013907	-21	date	19:45:02	1
4011968	99	58	8,13	cyclictest	4013907	-21	date	19:45:01	1
4011968	99	58	18,7	cyclictest	23	-21	ksoftirqd/1	20:35:01	1
4011968	99	58	10,14	cyclictest	4020860	-21	wc	22:00:01	1
4011977	99	57	11,6	cyclictest	13	1	rcu_preempt	21:10:01	3
4011968	99	57	39,14	cyclictest	4027280	-21	sshd	00:04:37	1
4011968	99	57	16,9	cyclictest	23	-21	ksoftirqd/1	20:20:02	1
4011973	99	56	9,5	cyclictest	13	1	rcu_preempt	22:05:01	2
4011968	99	56	38,13	cyclictest	1	-21	systemd	20:45:01	1
4011968	99	56	38,13	cyclictest	1	-21	systemd	20:45:01	1
4011968	99	56	15,9	cyclictest	23	-21	ksoftirqd/1	19:15:00	1
4011977	99	55	6,7	cyclictest	37	-21	ksoftirqd/3	22:56:59	3
4011977	99	55	35,15	cyclictest	1	-21	systemd	20:20:00	3
4011973	99	55	44,8	cyclictest	30	-21	ksoftirqd/2	21:15:01	2
4011973	99	55	10,5	cyclictest	13	1	rcu_preempt	22:45:00	2
4011968	99	55	11,14	cyclictest	4027063	-21	munin-run	00:00:01	1
4011968	99	55	11,14	cyclictest	4027063	-21	munin-run	00:00:01	1
4011963	99	55	49,3	cyclictest	0	-21	swapper/0	23:30:02	0
4011973	99	54	2,5	cyclictest	13	1	rcu_preempt	23:25:02	2
4011973	99	54	2,5	cyclictest	13	1	rcu_preempt	23:25:02	2
4011968	99	54	7,14	cyclictest	4018841	-21	sed	21:20:02	1
4011968	99	54	6,14	cyclictest	4022802	-21	apt-helper	22:39:23	1
4011977	99	53	20,12	cyclictest	37	-21	ksoftirqd/3	23:35:27	3
4011977	99	53	15,9	cyclictest	13	1	rcu_preempt	20:30:00	3
4011977	99	53	15,9	cyclictest	13	1	rcu_preempt	20:30:00	3
4011973	99	53	8,5	cyclictest	13	1	rcu_preempt	20:40:01	2
4011973	99	53	12,5	cyclictest	13	1	rcu_preempt	23:30:01	2
4011968	99	53	6,16	cyclictest	4028410	-21	sed	00:25:01	1
4011968	99	53	4,15	cyclictest	4026123	-21	latency_hist	23:40:02	1
4011968	99	53	13,8	cyclictest	23	-21	ksoftirqd/1	00:20:01	1
4011977	99	52	5,8	cyclictest	37	-21	ksoftirqd/3	00:05:00	3
4011977	99	52	24,19	cyclictest	37	-21	ksoftirqd/3	19:15:02	3
4011977	99	52	15,5	cyclictest	13	1	rcu_preempt	23:15:02	3
4011973	99	52	4,5	cyclictest	30	-21	ksoftirqd/2	20:10:00	2
4011968	99	52	3,17	cyclictest	0	-21	swapper/1	19:50:01	1
4011963	99	52	5,34	cyclictest	4011966	-21	latency_hist	19:10:00	0
4011977	99	51	8,5	cyclictest	13	1	rcu_preempt	20:15:02	3
4011977	99	51	6,9	cyclictest	37	-21	ksoftirqd/3	23:18:23	3
4011977	99	51	3,9	cyclictest	37	-21	ksoftirqd/3	19:20:02	3
4011977	99	51	3,6	cyclictest	13	1	rcu_preempt	21:25:02	3
4011977	99	51	11,5	cyclictest	13	1	rcu_preempt	19:30:00	3
4011973	99	51	41,8	cyclictest	29	1	rcuc/2	19:15:01	2
4011973	99	51	12,5	cyclictest	13	1	rcu_preempt	22:40:00	2
4011968	99	51	5,13	cyclictest	4020975	-21	modprobe	22:00:02	1
4011963	99	51	43,4	cyclictest	169	50	irq/224-8000000	00:00:01	0
4011963	99	51	43,4	cyclictest	169	50	irq/224-8000000	00:00:01	0
4011977	99	50	15,6	cyclictest	13	1	rcu_preempt	19:45:01	3
4011977	99	50	15,6	cyclictest	13	1	rcu_preempt	19:45:00	3
4011977	99	50	10,5	cyclictest	13	1	rcu_preempt	20:10:00	3
4011973	99	50	4,12	cyclictest	30	-21	ksoftirqd/2	21:00:01	2
4011973	99	50	4,12	cyclictest	30	-21	ksoftirqd/2	21:00:01	2
4011973	99	50	2,11	cyclictest	30	-21	ksoftirqd/2	19:30:00	2
4011973	99	50	11,6	cyclictest	13	1	rcu_preempt	22:55:00	2
4011973	99	50	11,5	cyclictest	13	1	rcu_preempt	00:15:37	2
4011973	99	50	10,6	cyclictest	13	1	rcu_preempt	23:15:00	2
4011968	99	50	6,16	cyclictest	1	-21	systemd	21:24:19	1
4011977	99	49	9,5	cyclictest	13	1	rcu_preempt	00:15:00	3
4011977	99	49	9,5	cyclictest	13	1	rcu_preempt	00:15:00	3
4011977	99	49	8,5	cyclictest	13	1	rcu_preempt	19:25:02	3
4011977	99	49	7,8	cyclictest	37	-21	ksoftirqd/3	20:50:02	3
4011977	99	49	14,6	cyclictest	37	-21	ksoftirqd/3	19:55:02	3
4011977	99	49	14,6	cyclictest	13	1	rcu_preempt	22:00:02	3
4011977	99	49	12,5	cyclictest	13	1	rcu_preempt	23:10:02	3
4011977	99	49	11,5	cyclictest	13	1	rcu_preempt	23:45:02	3
4011977	99	49	1,11	cyclictest	37	-21	ksoftirqd/3	23:55:01	3
4011973	99	49	9,6	cyclictest	13	1	rcu_preempt	00:15:02	2
4011973	99	49	9,6	cyclictest	13	1	rcu_preempt	00:15:02	2
4011973	99	49	8,7	cyclictest	13	1	rcu_preempt	21:05:02	2
4011973	99	49	8,7	cyclictest	13	1	rcu_preempt	21:05:02	2
4011973	99	49	4,6	cyclictest	13	1	rcu_preempt	23:50:01	2
4011973	99	49	3,10	cyclictest	30	-21	ksoftirqd/2	23:05:00	2
4011973	99	49	1,5	cyclictest	13	1	rcu_preempt	21:50:01	2
4011973	99	49	1,5	cyclictest	13	1	rcu_preempt	00:40:01	2
4011973	99	49	15,6	cyclictest	13	1	rcu_preempt	00:05:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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