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 Fri Dec 12, 2025 00:45:01)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
7464	99	73	6,20	cyclictest	21	-21	ksoftirqd/1	22:45:13	1
7473	99	51	4,42	cyclictest	0	-21	swapper/2	21:10:14	2
7473	99	50	2,15	cyclictest	0	-21	swapper/2	21:40:12	2
7453	99	50	5,41	cyclictest	1801	-21	ssh	21:35:10	0
7464	99	49	1,14	cyclictest	21	-21	ksoftirqd/1	00:35:17	1
7473	99	48	2,41	cyclictest	24613	-21	ssh	22:30:16	2
7473	99	48	2,13	cyclictest	9496	-21	ssh	22:00:13	2
7453	99	48	4,7	cyclictest	13	1	rcu_preempt	22:45:12	0
7453	99	48	10,24	cyclictest	13	1	rcu_preempt	19:25:12	0
7453	99	47	2,35	cyclictest	26358	-21	ssh	21:10:13	0
7453	99	45	22,15	cyclictest	629	-21	Async	14:00:48	0
7453	99	44	2,6	cyclictest	13	1	rcu_preempt	00:15:16	0
7464	99	43	1,12	cyclictest	21	-21	ksoftirqd/1	22:25:14	1
7453	99	42	2,30	cyclictest	0	-21	swapper/0	20:20:15	0
7453	99	42	1,28	cyclictest	14073	-21	ssh	00:25:18	0
7464	99	41	1,30	cyclictest	8003	-21	ssh	22:40:13	1
7453	99	41	2,29	cyclictest	21895	-21	ssh	00:30:15	0
7453	99	41	1,24	cyclictest	15457	-21	ssh	00:05:15	0
7473	99	39	2,6	cyclictest	0	-21	swapper/2	21:47:54	2
7473	99	39	2,29	cyclictest	16029	-21	ssh	23:05:14	2
7473	99	38	3,9	cyclictest	23654	-21	kthreadcore	00:30:24	2
7473	99	38	3,28	cyclictest	25357	-21	ssh	22:10:14	2
7453	99	38	5,19	cyclictest	12	-21	ksoftirqd/0	22:05:16	0
7473	99	37	9,12	cyclictest	13	1	rcu_preempt	22:05:17	2
7473	99	37	2,10	cyclictest	32534	-21	kthreadcore	23:55:23	2
7473	99	37	1,9	cyclictest	4456	-21	if_eth1	19:40:18	2
7473	99	36	1,8	cyclictest	27883	-21	netstat	22:50:28	2
7473	99	36	14,5	cyclictest	932	-21	snmpd	19:50:16	2
7473	99	36	0,11	cyclictest	17982	-21	latency_hist	21:25:02	2
7464	99	36	1,29	cyclictest	9929	-21	sh	21:40:16	1
7473	99	35	1,8	cyclictest	10965	-21	sendmail_mailtr	23:40:27	2
7473	99	35	1,15	cyclictest	11085	-21	cut	23:00:27	2
7473	99	34	25,6	cyclictest	263	46	irq/40-dwc2_hso	23:15:13	2
7473	99	34	22,5	cyclictest	27	-21	ksoftirqd/2	19:45:12	2
7473	99	33	19,6	cyclictest	0	-21	swapper/2	21:30:14	2
7473	99	33	1,10	cyclictest	16197	-21	apt-get	22:45:12	2
7464	99	33	2,28	cyclictest	0	-21	swapper/1	22:35:12	1
7464	99	33	1,29	cyclictest	25933	-21	ssh	21:50:17	1
7453	99	33	4,17	cyclictest	7160	-21	ssh	23:40:12	0
7453	99	33	3,21	cyclictest	15174	-21	diskmemload	23:45:13	0
7481	99	32	18,12	cyclictest	0	-21	swapper/3	22:30:17	3
7473	99	32	8,7	cyclictest	27	-21	ksoftirqd/2	00:35:16	2
7464	99	32	7,6	cyclictest	21	-21	ksoftirqd/1	21:10:13	1
7464	99	32	3,25	cyclictest	1535	-21	ssh	21:55:19	1
7464	99	32	2,18	cyclictest	22305	-21	kworker/u8:1	23:45:13	1
7453	99	32	3,7	cyclictest	13	1	rcu_preempt	19:55:12	0
7481	99	31	3,17	cyclictest	295	66	irq/58-eth0	21:40:15	3
7481	99	31	19,7	cyclictest	295	66	irq/58-eth0	21:55:16	3
7473	99	31	5,16	cyclictest	0	-21	swapper/2	19:30:14	2
7473	99	31	3,17	cyclictest	263	46	irq/40-dwc2_hso	19:35:12	2
7473	99	31	3,16	cyclictest	263	46	irq/40-dwc2_hso	23:10:16	2
7464	99	31	2,22	cyclictest	21	-21	ksoftirqd/1	20:40:12	1
7453	99	31	2,20	cyclictest	874	-21	ssh	22:15:17	0
7464	99	30	2,23	cyclictest	8724	-21	ssh	22:20:15	1
7464	99	30	17,10	cyclictest	21	-21	ksoftirqd/1	20:35:17	1
7481	99	29	2,18	cyclictest	295	66	irq/58-eth0	22:00:14	3
7473	99	29	3,21	cyclictest	0	-21	swapper/2	21:53:11	2
7473	99	29	3,14	cyclictest	16710	-21	ssh	22:25:15	2
7464	99	29	4,17	cyclictest	31869	-21	ssh	23:15:13	1
7464	99	29	1,23	cyclictest	31612	-21	ssh	23:35:16	1
7464	99	29	1,23	cyclictest	31612	-21	ssh	23:35:15	1
7481	99	28	4,15	cyclictest	295	66	irq/58-eth0	00:00:16	3
7481	99	28	3,18	cyclictest	0	-21	swapper/3	21:51:12	3
7473	99	28	6,10	cyclictest	263	46	irq/40-dwc2_hso	21:35:10	2
7473	99	28	3,18	cyclictest	263	46	irq/40-dwc2_hso	20:20:14	2
7473	99	28	2,20	cyclictest	0	-21	swapper/2	22:55:15	2
7453	99	28	2,17	cyclictest	23327	-21	ssh	23:50:15	0
7473	99	27	3,14	cyclictest	263	46	irq/40-dwc2_hso	20:25:17	2
7473	99	27	2,19	cyclictest	0	-21	swapper/2	00:15:17	2
7473	99	27	2,16	cyclictest	23410	-21	apt-get	00:10:15	2
7453	99	27	17,5	cyclictest	26006	-21	diskmemload	23:05:14	0
7453	99	27	1,22	cyclictest	8007	-21	ssh	22:40:13	0
7453	99	27	1,20	cyclictest	8059	-21	ssh	23:00:17	0
7481	99	26	3,14	cyclictest	0	-21	swapper/3	22:16:15	3
7481	99	26	2,17	cyclictest	0	-21	swapper/3	22:40:13	3
7473	99	26	4,15	cyclictest	263	46	irq/40-dwc2_hso	20:10:13	2
7473	99	26	4,13	cyclictest	263	46	irq/40-dwc2_hso	20:05:15	2
7473	99	26	3,13	cyclictest	263	46	irq/40-dwc2_hso	20:50:16	2
7473	99	26	2,16	cyclictest	263	46	irq/40-dwc2_hso	21:00:17	2
7473	99	26	1,16	cyclictest	23309	-21	rm	23:50:13	2
7453	99	26	5,4	cyclictest	13	1	rcu_preempt	21:15:15	0
7453	99	26	19,2	cyclictest	12	-21	ksoftirqd/0	21:20:16	0
7481	99	25	9,7	cyclictest	0	-21	swapper/3	23:55:15	3
7481	99	25	2,17	cyclictest	295	66	irq/58-eth0	21:15:16	3
7473	99	25	3,16	cyclictest	263	46	irq/40-dwc2_hso	23:25:14	2
7473	99	25	1,20	cyclictest	3521	-21	missed_timers	22:35:24	2
7464	99	25	1,19	cyclictest	25350	-21	ls	19:25:23	1
7464	99	25	1,18	cyclictest	32362	-21	ssh	22:55:16	1
7453	99	25	6,4	cyclictest	13	1	rcu_preempt	19:45:20	0
7481	99	24	2,13	cyclictest	295	66	irq/58-eth0	00:30:15	3
7473	99	24	7,14	cyclictest	26666	-21	cron	19:30:00	2
7473	99	24	5,9	cyclictest	263	46	irq/40-dwc2_hso	23:30:13	2
7473	99	24	2,10	cyclictest	0	-21	swapper/2	22:20:14	2
7473	99	24	0,21	cyclictest	5008	-21	missed_timers	21:55:26	2
7464	99	24	8,11	cyclictest	21	-21	ksoftirqd/1	19:15:15	1
7464	99	24	7,3	cyclictest	21	-21	ksoftirqd/1	00:27:53	1
7464	99	24	2,17	cyclictest	10181	-21	ssh	21:20:17	1
7464	99	24	2,16	cyclictest	21	-21	ksoftirqd/1	00:05:14	1
7464	99	24	16,6	cyclictest	0	-21	swapper/1	22:10:27	1
7464	99	24	12,3	cyclictest	21	-21	ksoftirqd/1	00:25:02	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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