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 May 18, 2026 00:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
31591	99	67	24,32	cyclictest	359	66	irq/58-eth0	23:35:13	3
31569	99	64	7,41	cyclictest	23982	-21	ssh	00:30:15	1
31583	99	50	2,22	cyclictest	2011	-21	ssh	00:00:13	2
31569	99	49	31,9	cyclictest	21	-21	ksoftirqd/1	00:05:12	1
31569	99	48	4,6	cyclictest	13	1	rcu_preempt	00:15:15	1
31563	99	47	3,32	cyclictest	16389	-21	ssh	23:50:15	0
31563	99	47	2,34	cyclictest	17744	-21	ssh	21:10:14	0
31583	99	46	6,25	cyclictest	27	-21	ksoftirqd/2	22:45:13	2
31569	99	46	3,32	cyclictest	12687	-21	ssh	21:25:12	1
31569	99	46	2,36	cyclictest	32297	-21	ssh	23:05:14	1
31569	99	45	3,34	cyclictest	23179	-21	ssh	23:00:13	1
31563	99	45	3,31	cyclictest	11676	-21	ssh	22:00:14	0
31563	99	44	2,35	cyclictest	5091	-21	ssh	22:50:13	0
31591	99	43	1,26	cyclictest	359	66	irq/58-eth0	20:15:13	3
31583	99	43	3,24	cyclictest	26908	-21	ssh	21:15:18	2
31569	99	42	1,32	cyclictest	3601	-21	ssh	21:20:13	1
31569	99	41	3,8	cyclictest	13	1	rcu_preempt	20:40:12	1
31569	99	41	1,33	cyclictest	19416	-21	ssh	22:40:12	1
31591	99	40	21,12	cyclictest	359	66	irq/58-eth0	22:10:13	3
31569	99	40	2,25	cyclictest	12650	-21	ssh	23:30:13	1
31583	99	39	1,25	cyclictest	2514	-21	ssh	21:55:13	2
31569	99	39	6,27	cyclictest	20097	-21	ssh	00:10:13	1
31591	99	38	4,15	cyclictest	359	66	irq/58-eth0	21:20:13	3
31591	99	38	3,24	cyclictest	359	66	irq/58-eth0	22:40:14	3
31591	99	38	30,5	cyclictest	359	66	irq/58-eth0	23:05:15	3
31569	99	37	10,21	cyclictest	21	-21	ksoftirqd/1	23:40:13	1
31563	99	37	4,21	cyclictest	7647	-21	ssh	21:40:13	0
31591	99	36	4,22	cyclictest	359	66	irq/58-eth0	00:15:14	3
31569	99	36	21,10	cyclictest	21	-21	ksoftirqd/1	22:20:15	1
31569	99	36	1,20	cyclictest	10330	-21	ssh	22:35:11	1
31569	99	36	1,20	cyclictest	10330	-21	ssh	22:35:10	1
31583	99	35	2,26	cyclictest	23194	-21	ssh	23:00:15	2
31583	99	35	1,24	cyclictest	930	-21	snmpd	20:35:13	2
31583	99	35	1,22	cyclictest	0	-21	swapper/2	00:30:15	2
31591	99	34	1,21	cyclictest	359	66	irq/58-eth0	00:20:13	3
31583	99	34	3,22	cyclictest	27	-21	ksoftirqd/2	23:25:13	2
31591	99	33	3,18	cyclictest	359	66	irq/58-eth0	22:35:10	3
31591	99	33	3,18	cyclictest	359	66	irq/58-eth0	22:35:10	3
31583	99	33	10,15	cyclictest	27	-21	ksoftirqd/2	21:25:12	2
31563	99	33	17,13	cyclictest	12	-21	ksoftirqd/0	23:10:15	0
31583	99	32	4,22	cyclictest	0	-21	swapper/2	22:40:14	2
31569	99	32	2,20	cyclictest	29757	-21	ssh	22:10:13	1
31583	99	31	1,19	cyclictest	11660	-21	ssh	22:00:14	2
31591	99	30	17,7	cyclictest	359	66	irq/58-eth0	21:30:14	3
31563	99	30	4,22	cyclictest	3584	-21	apt-get	21:20:13	0
31563	99	30	2,12	cyclictest	12	-21	ksoftirqd/0	23:45:15	0
31563	99	30	1,21	cyclictest	6523	-21	ssh	22:15:15	0
31563	99	30	1,21	cyclictest	5913	-21	ssh	00:20:14	0
31591	99	29	1,20	cyclictest	359	66	irq/58-eth0	00:05:13	3
31591	99	29	10,10	cyclictest	0	-21	swapper/3	19:35:13	3
31583	99	29	5,2	cyclictest	13	1	rcu_preempt	19:40:13	2
31583	99	29	2,20	cyclictest	0	-21	swapper/2	00:10:13	2
31583	99	29	18,8	cyclictest	27	-21	ksoftirqd/2	23:50:14	2
31583	99	29	1,21	cyclictest	21782	-21	ssh	21:30:13	2
31569	99	29	12,9	cyclictest	0	-21	swapper/1	22:15:13	1
31591	99	28	17,5	cyclictest	359	66	irq/58-eth0	00:10:13	3
31583	99	28	2,14	cyclictest	27083	-21	ssh	23:20:15	2
31583	99	28	1,16	cyclictest	930	-21	snmpd	22:35:12	2
31583	99	28	1,16	cyclictest	930	-21	snmpd	22:35:11	2
31569	99	28	8,9	cyclictest	31553	-21	cyclictest	23:55:13	1
31569	99	28	8,9	cyclictest	31553	-21	cyclictest	23:55:12	1
31569	99	28	1,20	cyclictest	0	-21	swapper/1	00:35:13	1
31569	99	28	1,18	cyclictest	5887	-21	sh	00:20:11	1
31569	99	28	10,7	cyclictest	21	-21	ksoftirqd/1	20:25:12	1
31583	99	27	6,18	cyclictest	27	-21	ksoftirqd/2	23:10:14	2
31583	99	26	1,13	cyclictest	21686	-21	ssh	23:35:14	2
31583	99	26	0,21	cyclictest	17998	-21	ssh	23:15:14	2
31583	99	26	0,21	cyclictest	17998	-21	ssh	23:15:14	2
31563	99	26	9,8	cyclictest	12	-21	ksoftirqd/0	23:30:13	0
31591	99	25	2,10	cyclictest	359	66	irq/58-eth0	00:35:12	3
31583	99	25	3,16	cyclictest	273	46	irq/40-dwc2_hso	21:00:14	2
31583	99	25	2,18	cyclictest	17336	-21	diskmemload	22:30:14	2
31583	99	25	1,19	cyclictest	11062	-21	ssh	00:05:14	2
31583	99	25	1,11	cyclictest	13869	-21	cut	19:25:16	2
31583	99	25	1,10	cyclictest	5085	-21	ssh	22:50:13	2
31563	99	25	7,12	cyclictest	12	-21	ksoftirqd/0	20:00:12	0
31563	99	25	5,5	cyclictest	12	-21	ksoftirqd/0	00:36:27	0
31563	99	25	5,14	cyclictest	20696	-21	ssh	22:05:13	0
31591	99	24	2,13	cyclictest	0	-21	swapper/3	00:30:14	3
31583	99	24	7,8	cyclictest	3657	-21	ps	23:05:27	2
31583	99	24	2,18	cyclictest	273	46	irq/40-dwc2_hso	19:30:13	2
31583	99	24	2,17	cyclictest	273	46	irq/40-dwc2_hso	19:15:14	2
31583	99	24	2,14	cyclictest	273	46	irq/40-dwc2_hso	19:20:14	2
31583	99	24	2,13	cyclictest	27507	-21	cut	22:25:22	2
31583	99	24	14,7	cyclictest	31553	-21	cyclictest	19:55:12	2
31583	99	24	12,9	cyclictest	4119	-21	ssh	21:36:20	2
31583	99	24	1,17	cyclictest	449	-21	diskmemload	00:35:13	2
31583	99	24	1,11	cyclictest	3611	-21	ssh	21:20:15	2
31583	99	24	0,21	cyclictest	6481	-21	latency_hist	20:25:01	2
31569	99	24	7,8	cyclictest	13	1	rcu_preempt	22:10:01	1
31569	99	24	0,3	cyclictest	13	1	rcu_preempt	21:55:13	1
31563	99	24	8,6	cyclictest	12	-21	ksoftirqd/0	22:37:42	0
31563	99	24	8,6	cyclictest	12	-21	ksoftirqd/0	22:37:42	0
31563	99	24	6,9	cyclictest	24652	-21	ssh	22:25:13	0
31563	99	24	6,10	cyclictest	12	-21	ksoftirqd/0	21:47:01	0
31563	99	24	4,3	cyclictest	13	1	rcu_preempt	22:24:08	0
31591	99	23	3,14	cyclictest	359	66	irq/58-eth0	23:55:13	3
31591	99	23	3,14	cyclictest	359	66	irq/58-eth0	23:55:13	3
31591	99	23	3,11	cyclictest	0	-21	swapper/3	22:30:14	3
31583	99	23	9,11	cyclictest	15381	-21	sed	00:25:18	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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