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 Jul 10, 2026 00:45:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
28929	99	70	6,6	cyclictest	13	1	rcu_preempt	21:25:14	1
28918	99	56	4,6	cyclictest	13	1	rcu_preempt	00:25:16	0
28918	99	48	7,28	cyclictest	28852	-21	ssh	00:00:14	0
28929	99	47	3,35	cyclictest	16445	-21	ssh	22:05:12	1
28918	99	47	2,40	cyclictest	5453	-21	ssh	00:05:14	0
28945	99	45	1,34	cyclictest	0	-21	swapper/3	21:40:15	3
28937	99	44	11,14	cyclictest	11894	-21	cat	22:00:32	2
28929	99	44	4,36	cyclictest	27212	-21	rm	00:35:13	1
28918	99	44	3,10	cyclictest	13	1	rcu_preempt	23:55:15	0
28918	99	42	1,15	cyclictest	13	1	rcu_preempt	22:05:14	0
28937	99	41	2,27	cyclictest	27	-21	ksoftirqd/2	23:30:12	2
28918	99	41	1,27	cyclictest	30646	-21	ssh	23:25:15	0
28945	99	40	4,20	cyclictest	359	66	irq/58-eth0	23:45:14	3
28945	99	39	3,26	cyclictest	359	66	irq/58-eth0	20:50:12	3
28945	99	39	3,25	cyclictest	359	66	irq/58-eth0	00:00:13	3
28937	99	39	2,19	cyclictest	13881	-21	sh	22:39:56	2
28937	99	38	2,28	cyclictest	15207	-21	ssh	21:26:32	2
28929	99	38	2,33	cyclictest	12715	-21	ssh	23:15:16	1
28945	99	37	6,25	cyclictest	359	66	irq/58-eth0	00:30:14	3
28945	99	37	17,13	cyclictest	359	66	irq/58-eth0	23:15:15	3
28937	99	37	2,23	cyclictest	18459	-21	ssh	21:30:11	2
28945	99	36	3,26	cyclictest	359	66	irq/58-eth0	00:15:14	3
28945	99	36	2,27	cyclictest	359	66	irq/58-eth0	21:35:14	3
28937	99	36	3,25	cyclictest	18089	-21	ssh	23:00:13	2
28929	99	36	2,26	cyclictest	5309	-21	ssh	22:35:13	1
28945	99	35	5,25	cyclictest	359	66	irq/58-eth0	21:15:17	3
28945	99	35	3,18	cyclictest	359	66	irq/58-eth0	22:20:14	3
28945	99	34	21,7	cyclictest	359	66	irq/58-eth0	23:10:12	3
28937	99	33	3,20	cyclictest	25169	-21	ssh	23:40:14	2
28937	99	33	13,12	cyclictest	0	-21	swapper/2	00:00:14	2
28918	99	33	2,22	cyclictest	21671	-21	ssh	23:20:12	0
28937	99	32	3,22	cyclictest	0	-21	swapper/2	00:22:38	2
28945	99	31	4,18	cyclictest	359	66	irq/58-eth0	21:05:13	3
28937	99	31	3,21	cyclictest	0	-21	swapper/2	21:51:32	2
28918	99	31	2,3	cyclictest	13	1	rcu_preempt	23:00:12	0
28945	99	30	1,17	cyclictest	359	66	irq/58-eth0	23:05:14	3
28945	99	30	11,15	cyclictest	0	-21	swapper/3	22:30:14	3
28937	99	30	2,21	cyclictest	0	-21	swapper/2	22:25:16	2
28937	99	30	2,16	cyclictest	273	46	irq/40-dwc2_hso	19:40:13	2
28929	99	30	3,5	cyclictest	13	1	rcu_preempt	21:40:13	1
28945	99	29	1,17	cyclictest	359	66	irq/58-eth0	19:40:12	3
28937	99	29	3,17	cyclictest	273	46	irq/40-dwc2_hso	00:10:15	2
28937	99	29	2,20	cyclictest	0	-21	swapper/2	19:30:13	2
28937	99	29	2,19	cyclictest	273	46	irq/40-dwc2_hso	22:20:14	2
28937	99	29	12,11	cyclictest	26	1	rcuc/2	19:20:12	2
28937	99	29	1,13	cyclictest	3638	-21	rm	23:10:12	2
28929	99	29	22,4	cyclictest	21974	-21	ssh	21:50:12	1
28918	99	29	1,25	cyclictest	9527	-21	ssh	21:25:15	0
28937	99	28	6,7	cyclictest	27	-21	ksoftirqd/2	22:41:33	2
28937	99	28	4,18	cyclictest	273	46	irq/40-dwc2_hso	20:45:11	2
28937	99	28	3,15	cyclictest	273	46	irq/40-dwc2_hso	21:55:14	2
28937	99	28	2,20	cyclictest	19396	-21	ssh	23:55:02	2
28937	99	28	10,7	cyclictest	0	-21	swapper/2	23:09:06	2
28945	99	27	3,16	cyclictest	0	-21	swapper/3	22:05:32	3
28945	99	27	3,16	cyclictest	0	-21	swapper/3	22:00:33	3
28945	99	27	3,15	cyclictest	359	66	irq/58-eth0	00:10:13	3
28945	99	27	11,10	cyclictest	359	66	irq/58-eth0	21:27:10	3
28937	99	27	8,12	cyclictest	27	-21	ksoftirqd/2	00:15:16	2
28937	99	27	8,10	cyclictest	8760	-21	gpgv	22:55:02	2
28937	99	27	7,11	cyclictest	27	-21	ksoftirqd/2	23:28:48	2
28937	99	27	3,17	cyclictest	0	-21	swapper/2	22:05:32	2
28937	99	27	1,20	cyclictest	25896	-21	ssh	23:57:01	2
28929	99	27	2,20	cyclictest	20338	-21	rm	21:48:32	1
28945	99	26	3,17	cyclictest	0	-21	swapper/3	21:31:32	3
28945	99	26	3,13	cyclictest	359	66	irq/58-eth0	23:00:13	3
28937	99	26	6,7	cyclictest	27	-21	ksoftirqd/2	00:07:49	2
28937	99	26	4,11	cyclictest	273	46	irq/40-dwc2_hso	20:20:14	2
28937	99	26	2,18	cyclictest	0	-21	swapper/2	19:15:12	2
28937	99	26	2,14	cyclictest	273	46	irq/40-dwc2_hso	20:30:12	2
28937	99	26	1,15	cyclictest	273	46	irq/40-dwc2_hso	20:00:14	2
28937	99	26	1,14	cyclictest	273	46	irq/40-dwc2_hso	19:50:12	2
28937	99	26	0,4	cyclictest	27	1	ksoftirqd/2	00:26:02	2
28937	99	26	0,17	cyclictest	21479	-21	ls	23:20:02	2
28929	99	26	0,23	cyclictest	0	-21	swapper/1	21:35:12	1
28918	99	26	1,2	cyclictest	13	1	rcu_preempt	22:50:12	0
28945	99	25	4,13	cyclictest	0	-21	swapper/3	23:40:14	3
28945	99	25	4,12	cyclictest	0	-21	swapper/3	23:35:14	3
28945	99	25	4,12	cyclictest	0	-21	swapper/3	23:35:13	3
28945	99	25	3,14	cyclictest	0	-21	swapper/3	22:10:13	3
28945	99	25	13,7	cyclictest	359	66	irq/58-eth0	22:40:13	3
28937	99	25	8,7	cyclictest	27	-21	ksoftirqd/2	21:19:30	2
28937	99	25	4,11	cyclictest	27	-21	ksoftirqd/2	00:34:59	2
28937	99	25	3,14	cyclictest	273	46	irq/40-dwc2_hso	19:35:12	2
28937	99	25	2,8	cyclictest	31099	-21	ssh	22:48:56	2
28937	99	25	2,4	cyclictest	27	-21	ksoftirqd/2	21:40:21	2
28937	99	25	2,17	cyclictest	273	46	irq/40-dwc2_hso	20:50:12	2
28929	99	25	1,19	cyclictest	9151	-21	ssh	00:25:16	1
28929	99	25	11,9	cyclictest	2540	-21	ssh	00:02:03	1
28929	99	25	1,19	cyclictest	23433	-21	ssh	22:45:15	1
28918	99	25	1,18	cyclictest	27063	-21	ssh	23:05:14	0
28918	99	25	1,17	cyclictest	23555	-21	ssh	00:15:13	0
28945	99	24	4,16	cyclictest	359	66	irq/58-eth0	23:55:14	3
28945	99	24	3,15	cyclictest	0	-21	swapper/3	22:15:18	3
28945	99	24	3,15	cyclictest	0	-21	swapper/3	00:05:16	3
28937	99	24	6,4	cyclictest	27	-21	ksoftirqd/2	22:31:58	2
28937	99	24	6,10	cyclictest	27	-21	ksoftirqd/2	20:11:59	2
28937	99	24	5,7	cyclictest	13	1	rcu_preempt	21:35:14	2
28937	99	24	5,12	cyclictest	27	-21	ksoftirqd/2	20:40:23	2
28937	99	24	4,8	cyclictest	27	-21	ksoftirqd/2	23:36:56	2
28937	99	24	4,8	cyclictest	27	-21	ksoftirqd/2	23:36:56	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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