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
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, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot4s.osadl.org (updated Tue Dec 02, 2025 00:45:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
14847	99	60	3,45	cyclictest	14512	-21	ssh	22:55:15	2
14847	99	57	1,3	cyclictest	0	-21	swapper/2	19:25:16	2
14838	99	54	8,41	cyclictest	11696	-21	sshd	21:55:15	1
14847	99	53	2,7	cyclictest	0	-21	swapper/2	21:45:16	2
14847	99	52	1,31	cyclictest	6272	-21	ssh	22:50:14	2
14847	99	51	1,45	cyclictest	30375	-21	sshd	22:45:16	2
14847	99	51	1,45	cyclictest	30375	-21	sshd	22:45:15	2
14847	99	51	1,3	cyclictest	0	-21	swapper/2	23:10:14	2
14847	99	50	2,3	cyclictest	856	-21	sshd	19:35:13	2
14847	99	50	1,44	cyclictest	0	-21	swapper/2	22:30:13	2
14847	99	49	1,8	cyclictest	0	-21	swapper/2	21:10:13	2
14847	99	49	1,40	cyclictest	0	-21	swapper/2	23:30:15	2
14847	99	48	1,3	cyclictest	0	-21	swapper/2	20:10:15	2
14824	99	48	2,9	cyclictest	13	1	rcu_preempt	23:05:16	0
14847	99	47	2,24	cyclictest	438	-21	ssh	00:05:13	2
14847	99	46	3,38	cyclictest	7549	-21	apt-get	00:30:11	2
14847	99	46	0,3	cyclictest	31153	-21	ssh	23:05:16	2
14847	99	45	1,37	cyclictest	263	46	irq/40-dwc2_hso	21:25:15	2
14847	99	45	0,4	cyclictest	11688	-21	apt-get	21:55:16	2
14847	99	44	1,37	cyclictest	263	46	irq/40-dwc2_hso	19:20:15	2
14847	99	44	1,2	cyclictest	8506	-21	apt-get	00:10:17	2
14847	99	44	1,2	cyclictest	1973	-21	apt-get	19:30:14	2
14847	99	44	1,2	cyclictest	0	-21	swapper/2	00:20:11	2
14824	99	44	3,7	cyclictest	13	1	rcu_preempt	20:05:17	0
14847	99	43	1,33	cyclictest	16107	-21	ssh	23:35:14	2
14856	99	42	27,8	cyclictest	295	66	irq/58-eth0	22:50:13	3
14847	99	42	3,21	cyclictest	19147	-21	ssh	21:40:15	2
14847	99	42	2,36	cyclictest	0	-21	swapper/2	19:45:12	2
14847	99	42	2,2	cyclictest	11611	-21	apt-get	19:40:14	2
14847	99	42	1,4	cyclictest	0	-21	swapper/2	23:20:13	2
14847	99	42	1,4	cyclictest	0	-21	swapper/2	23:20:13	2
14847	99	41	1,3	cyclictest	0	-21	swapper/2	22:35:15	2
14824	99	41	8,7	cyclictest	13	1	rcu_preempt	00:30:11	0
14847	99	40	2,31	cyclictest	0	-21	swapper/2	21:50:14	2
14847	99	40	1,5	cyclictest	24053	-21	grep	22:00:29	2
14847	99	40	1,2	cyclictest	28850	-21	apt-get	21:05:13	2
14847	99	40	0,25	cyclictest	0	-21	swapper/2	00:25:13	2
14847	99	39	2,7	cyclictest	0	-21	swapper/2	23:15:14	2
14847	99	39	2,3	cyclictest	16759	-21	apt-get	00:15:13	2
14847	99	39	1,7	cyclictest	263	46	irq/40-dwc2_hso	21:15:12	2
14847	99	39	1,3	cyclictest	0	-21	swapper/2	23:25:14	2
14847	99	39	1,2	cyclictest	14389	-21	apt-get	20:50:15	2
14838	99	39	1,29	cyclictest	5376	-21	ssh	22:30:14	1
14856	99	38	1,24	cyclictest	295	66	irq/58-eth0	00:30:12	3
14847	99	38	1,5	cyclictest	0	-21	swapper/2	20:20:15	2
14847	99	38	1,5	cyclictest	0	-21	swapper/2	20:20:15	2
14847	99	38	1,3	cyclictest	4683	-21	apt-get	20:40:14	2
14847	99	38	1,33	cyclictest	8540	-21	unixbench_singl	22:10:29	2
14838	99	38	1,32	cyclictest	24794	-21	sshd	19:20:13	1
14847	99	37	2,25	cyclictest	24078	-21	cut	22:40:22	2
14847	99	37	1,7	cyclictest	24439	-21	cron	00:00:00	2
14847	99	37	1,3	cyclictest	0	-21	swapper/2	00:00:13	2
14847	99	37	1,2	cyclictest	0	-21	swapper/2	20:25:15	2
14847	99	36	1,4	cyclictest	21110	-21	sort	20:55:23	2
14847	99	36	1,3	cyclictest	0	-21	swapper/2	20:00:16	2
14847	99	36	1,2	cyclictest	0	-21	swapper/2	20:35:14	2
14847	99	36	1,2	cyclictest	0	-21	swapper/2	19:10:15	2
14824	99	36	3,30	cyclictest	444	-21	sh	00:05:13	0
14824	99	36	18,13	cyclictest	21166	-21	sshd	22:20:15	0
14847	99	35	1,3	cyclictest	0	-21	swapper/2	19:50:14	2
14847	99	35	1,29	cyclictest	28775	-21	irqcore	22:05:19	2
14847	99	35	0,5	cyclictest	18769	-21	ssh	22:17:12	2
14847	99	35	0,31	cyclictest	24488	-21	apt-get	23:40:13	2
14847	99	35	0,2	cyclictest	18010	-21	apt-get	21:20:14	2
14838	99	35	4,23	cyclictest	21	-21	ksoftirqd/1	00:30:11	1
14838	99	35	1,17	cyclictest	13	1	rcu_preempt	20:20:15	1
14838	99	35	1,17	cyclictest	13	1	rcu_preempt	20:20:15	1
14824	99	35	27,6	cyclictest	12	-21	ksoftirqd/0	21:20:12	0
14847	99	34	1,2	cyclictest	0	-21	swapper/2	22:25:15	2
14847	99	34	1,25	cyclictest	8225	-21	apt	23:50:01	2
14856	99	33	1,19	cyclictest	295	66	irq/58-eth0	23:25:14	3
14847	99	33	5,25	cyclictest	2810	-21	irqcore	21:30:18	2
14847	99	33	5,25	cyclictest	2810	-21	irqcore	21:30:18	2
14847	99	33	4,25	cyclictest	8793	-21	fschecks_time	23:50:16	2
14847	99	33	1,3	cyclictest	26312	-21	memory	23:00:25	2
14847	99	33	1,28	cyclictest	10121	-21	uname	20:45:20	2
14847	99	33	0,7	cyclictest	27582	-21	cut	21:00:28	2
14847	99	33	0,3	cyclictest	21150	-21	apt-get	22:20:14	2
14847	99	33	0,29	cyclictest	16554	-21	switchtime	20:15:29	2
14824	99	33	2,5	cyclictest	13	1	rcu_preempt	20:55:17	0
14847	99	32	1,6	cyclictest	22287	-21	ssh	00:40:02	2
14847	99	32	1,5	cyclictest	26054	-21	/usr/sbin/munin	19:55:31	2
14847	99	32	0,2	cyclictest	10728	-21	apt-get	21:35:14	2
14838	99	32	2,22	cyclictest	30380	-21	ssh	22:45:15	1
14838	99	32	2,22	cyclictest	30380	-21	ssh	22:45:15	1
14838	99	32	12,11	cyclictest	21	-21	ksoftirqd/1	23:55:15	1
14824	99	32	21,7	cyclictest	12	-21	ksoftirqd/0	20:00:16	0
14856	99	31	25,4	cyclictest	0	-21	swapper/3	21:40:16	3
14847	99	31	1,6	cyclictest	30244	-21	cut	20:30:23	2
14847	99	31	1,5	cyclictest	5438	-21	tr	20:05:26	2
14847	99	31	0,5	cyclictest	19918	-21	/usr/sbin/munin	19:15:16	2
14838	99	31	5,16	cyclictest	21	-21	ksoftirqd/1	20:50:14	1
14838	99	31	3,19	cyclictest	8580	-21	ssh	23:50:12	1
14824	99	31	4,21	cyclictest	29453	-21	ssh	22:25:15	0
14824	99	31	3,21	cyclictest	24515	-21	ssh	23:40:15	0
14824	99	31	2,25	cyclictest	932	-21	snmpd	19:55:15	0
14838	99	30	2,22	cyclictest	29470	-21	ssh	22:25:15	1
14824	99	30	3,24	cyclictest	7627	-21	ssh	23:30:14	0
14824	99	30	2,12	cyclictest	20111	-21	ssh	22:00:14	0
14824	99	30	19,6	cyclictest	13	1	rcu_preempt	23:10:14	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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