OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #4

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot4s.osadl.org (updated Mon Jun 15, 2026 00:45:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
29868	99	57	31,20	cyclictest	359	66	irq/58-eth0	00:35:13	3
29836	99	57	3,45	cyclictest	30204	-21	ssh	23:05:14	0
29847	99	52	2,40	cyclictest	5445	-21	ssh	23:45:14	1
29847	99	52	2,40	cyclictest	5445	-21	ssh	23:45:14	1
29868	99	50	24,15	cyclictest	359	66	irq/58-eth0	22:35:12	3
29847	99	50	3,7	cyclictest	13	1	rcu_preempt	00:10:15	1
29847	99	48	3,9	cyclictest	13	1	rcu_preempt	20:20:13	1
29858	99	47	2,32	cyclictest	24896	-21	ssh	23:20:12	2
29836	99	47	4,5	cyclictest	13	1	rcu_preempt	20:10:12	0
29836	99	46	1,39	cyclictest	28860	-21	ssh	21:35:14	0
29847	99	43	4,32	cyclictest	1610	-21	ssh	21:20:12	1
29847	99	43	28,6	cyclictest	21	-21	ksoftirqd/1	23:20:12	1
29836	99	43	3,5	cyclictest	13	1	rcu_preempt	22:30:14	0
29868	99	42	2,24	cyclictest	359	66	irq/58-eth0	23:20:12	3
29858	99	42	1,29	cyclictest	6785	-21	ssh	23:10:11	2
29858	99	42	1,29	cyclictest	6785	-21	ssh	23:10:11	2
29847	99	41	1,25	cyclictest	23701	-21	ssh	21:50:13	1
29836	99	41	2,4	cyclictest	13	1	rcu_preempt	22:25:12	0
29868	99	40	3,24	cyclictest	359	66	irq/58-eth0	22:30:14	3
29847	99	40	7,10	cyclictest	13	1	rcu_preempt	20:30:12	1
29836	99	40	5,23	cyclictest	14577	-21	ssh	23:50:13	0
29836	99	40	4,25	cyclictest	4219	-21	sh	22:15:13	0
29868	99	39	3,23	cyclictest	359	66	irq/58-eth0	21:55:13	3
29836	99	39	2,33	cyclictest	28841	-21	ssh	23:40:13	0
29836	99	39	2,29	cyclictest	31116	-21	ssh	00:35:12	0
29868	99	38	1,20	cyclictest	359	66	irq/58-eth0	19:15:13	3
29858	99	38	2,17	cyclictest	19773	-21	ssh	23:35:12	2
29858	99	38	2,17	cyclictest	19773	-21	ssh	23:35:11	2
29868	99	37	2,23	cyclictest	359	66	irq/58-eth0	21:25:13	3
29868	99	37	2,23	cyclictest	359	66	irq/58-eth0	21:25:13	3
29868	99	35	11,12	cyclictest	359	66	irq/58-eth0	22:05:14	3
29868	99	35	11,12	cyclictest	359	66	irq/58-eth0	22:05:14	3
29858	99	35	3,16	cyclictest	30195	-21	ssh	23:05:13	2
29836	99	35	2,24	cyclictest	23675	-21	ssh	23:55:13	0
29868	99	34	3,16	cyclictest	359	66	irq/58-eth0	00:10:14	3
29858	99	34	9,20	cyclictest	27	-21	ksoftirqd/2	19:50:13	2
29858	99	34	3,19	cyclictest	27	-21	ksoftirqd/2	23:00:12	2
29847	99	34	2,2	cyclictest	13	1	rcu_preempt	22:15:13	1
29836	99	34	8,17	cyclictest	18496	-21	ssh	22:05:13	0
29836	99	34	8,17	cyclictest	18496	-21	ssh	22:05:12	0
29847	99	33	4,17	cyclictest	844	-21	munin-node	21:00:14	1
29847	99	33	3,19	cyclictest	21	-21	ksoftirqd/1	22:00:12	1
29847	99	33	18,10	cyclictest	0	-21	swapper/1	23:00:13	1
29858	99	32	13,11	cyclictest	31350	-21	ssh	22:30:14	2
29836	99	32	1,27	cyclictest	32732	-21	ssh	00:00:13	0
29858	99	31	4,18	cyclictest	273	46	irq/40-dwc2_hso	21:10:12	2
29858	99	30	4,12	cyclictest	26	1	rcuc/2	00:10:14	2
29858	99	30	3,21	cyclictest	0	-21	swapper/2	19:40:13	2
29858	99	30	3,16	cyclictest	10714	-21	ssh	21:25:13	2
29858	99	30	3,16	cyclictest	10714	-21	ssh	21:25:13	2
29858	99	30	2,21	cyclictest	0	-21	swapper/2	20:15:15	2
29858	99	30	2,18	cyclictest	273	46	irq/40-dwc2_hso	19:55:13	2
29847	99	30	23,4	cyclictest	12042	-21	sh	22:55:12	1
29836	99	30	2,22	cyclictest	15802	-21	ssh	23:15:13	0
29836	99	30	2,22	cyclictest	15802	-21	ssh	23:15:13	0
29868	99	29	6,15	cyclictest	359	66	irq/58-eth0	22:15:13	3
29868	99	28	2,15	cyclictest	359	66	irq/58-eth0	22:20:12	3
29858	99	28	3,17	cyclictest	273	46	irq/40-dwc2_hso	21:50:13	2
29858	99	28	2,20	cyclictest	4014	-21	ssh	00:20:14	2
29858	99	28	2,19	cyclictest	0	-21	swapper/2	20:10:13	2
29858	99	28	2,16	cyclictest	273	46	irq/40-dwc2_hso	21:05:14	2
29858	99	28	10,13	cyclictest	27	-21	ksoftirqd/2	23:15:13	2
29858	99	28	10,13	cyclictest	27	-21	ksoftirqd/2	23:15:13	2
29847	99	28	3,6	cyclictest	13	1	rcu_preempt	19:35:14	1
29847	99	28	2,21	cyclictest	14607	-21	ssh	21:45:15	1
29847	99	28	2,19	cyclictest	15859	-21	ssh	21:10:14	1
29847	99	28	17,4	cyclictest	21	-21	ksoftirqd/1	21:15:15	1
29836	99	28	3,16	cyclictest	8072	-21	ssh	22:35:13	0
29836	99	28	1,21	cyclictest	2988	-21	ssh	22:50:14	0
29868	99	27	5,14	cyclictest	0	-21	swapper/3	23:25:13	3
29858	99	27	8,9	cyclictest	14256	-21	cron	20:35:02	2
29858	99	27	3,14	cyclictest	273	46	irq/40-dwc2_hso	19:45:14	2
29858	99	27	2,20	cyclictest	0	-21	swapper/2	22:35:13	2
29858	99	27	1,19	cyclictest	5435	-21	ssh	23:45:14	2
29858	99	27	1,19	cyclictest	5435	-21	ssh	23:45:14	2
29858	99	27	1,10	cyclictest	2797	66	ssh	00:35:30	2
29847	99	27	7,10	cyclictest	27562	-21	ssh	22:10:12	1
29847	99	27	1,14	cyclictest	5532	-21	ssh	21:40:13	1
29868	99	26	2,15	cyclictest	359	66	irq/58-eth0	00:20:14	3
29868	99	26	16,6	cyclictest	0	-21	swapper/3	22:00:12	3
29868	99	26	16,4	cyclictest	0	-21	swapper/3	23:35:12	3
29868	99	26	16,4	cyclictest	0	-21	swapper/3	23:35:12	3
29858	99	26	3,16	cyclictest	273	46	irq/40-dwc2_hso	20:35:14	2
29858	99	26	1,18	cyclictest	11945	-21	find	19:25:09	2
29858	99	26	1,17	cyclictest	273	46	irq/40-dwc2_hso	22:00:12	2
29847	99	26	12,9	cyclictest	21	1	ksoftirqd/1	00:00:13	1
29847	99	26	10,11	cyclictest	21	-21	ksoftirqd/1	00:30:11	1
29836	99	26	5,18	cyclictest	12	-21	ksoftirqd/0	21:15:14	0
29836	99	26	2,19	cyclictest	19796	-21	ssh	21:30:14	0
29836	99	26	1,19	cyclictest	1597	-21	ssh	23:25:13	0
29868	99	25	2,11	cyclictest	359	66	irq/58-eth0	20:55:13	3
29868	99	25	14,7	cyclictest	0	-21	swapper/3	21:15:12	3
29868	99	25	1,15	cyclictest	359	66	irq/58-eth0	21:45:14	3
29868	99	25	10,10	cyclictest	359	66	irq/58-eth0	22:40:14	3
29858	99	25	8,13	cyclictest	26	1	rcuc/2	23:50:12	2
29858	99	25	6,16	cyclictest	13331	-21	ssh	22:20:14	2
29858	99	25	1,16	cyclictest	1056	-21	latency_hist	20:55:01	2
29858	99	25	1,16	cyclictest	1056	-21	latency_hist	20:55:01	2
29858	99	25	1,14	cyclictest	4809	-21	kthreadcore	23:25:22	2
29858	99	25	1,10	cyclictest	0	-21	swapper/2	20:05:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17