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 Sun Aug 23, 2026 00:45:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
29466	99	54	32,12	cyclictest	12	-21	ksoftirqd/0	21:45:12	0
29475	99	53	1,41	cyclictest	24928	-21	ssh	22:45:12	1
29475	99	53	1,38	cyclictest	1548	-21	ssh	22:50:13	1
29466	99	53	2,11	cyclictest	13	1	rcu_preempt	00:30:14	0
29466	99	50	3,34	cyclictest	26733	-21	ssh	23:40:12	0
29475	99	46	1,38	cyclictest	19195	-21	ssh	21:30:15	1
29466	99	46	3,33	cyclictest	10422	-21	ssh	00:25:12	0
29493	99	45	25,13	cyclictest	359	66	irq/58-eth0	22:55:15	3
29493	99	43	27,7	cyclictest	359	66	irq/58-eth0	21:40:12	3
29466	99	42	2,5	cyclictest	13	1	rcu_preempt	23:15:12	0
29466	99	42	2,32	cyclictest	3224	-21	ssh	22:15:13	0
29466	99	42	2,32	cyclictest	3224	-21	ssh	22:15:12	0
29466	99	42	2,30	cyclictest	12258	-21	ssh	22:20:14	0
29466	99	42	14,21	cyclictest	12	-21	ksoftirqd/0	20:45:15	0
29475	99	39	0,29	cyclictest	0	-21	swapper/1	20:35:13	1
29466	99	39	1,30	cyclictest	0	-21	swapper/0	00:35:14	0
29485	99	37	2,18	cyclictest	24578	-21	ssh	23:37:56	2
29485	99	36	2,16	cyclictest	26	1	rcuc/2	21:45:11	2
29475	99	36	1,24	cyclictest	10164	-21	ssh	21:25:13	1
29466	99	36	5,22	cyclictest	12	-21	ksoftirqd/0	21:00:14	0
29493	99	35	2,21	cyclictest	359	66	irq/58-eth0	20:15:12	3
29493	99	35	2,21	cyclictest	359	66	irq/58-eth0	20:15:12	3
29475	99	35	7,17	cyclictest	15063	-21	diskmemload	23:50:13	1
29466	99	35	4,23	cyclictest	3377	-21	ssh	23:45:12	0
29493	99	34	2,19	cyclictest	359	66	irq/58-eth0	00:00:14	3
29493	99	33	3,15	cyclictest	359	66	irq/58-eth0	22:25:13	3
29485	99	33	2,24	cyclictest	0	-21	swapper/2	21:30:14	2
29475	99	33	2,23	cyclictest	10551	-21	ssh	22:55:14	1
29466	99	33	19,12	cyclictest	12	-21	ksoftirqd/0	23:25:12	0
29493	99	32	24,6	cyclictest	32	1	rcuc/3	20:55:13	3
29485	99	32	2,24	cyclictest	0	-21	swapper/2	23:33:56	2
29475	99	32	2,20	cyclictest	15050	-21	kworker/u8:2	21:10:13	1
29466	99	32	16,10	cyclictest	0	-21	swapper/0	20:10:12	0
29485	99	31	1,2	cyclictest	13	1	rcu_preempt	21:50:12	2
29493	99	30	5,14	cyclictest	359	66	irq/58-eth0	21:55:12	3
29493	99	30	4,14	cyclictest	0	-21	swapper/3	21:30:14	3
29493	99	30	20,7	cyclictest	359	66	irq/58-eth0	23:40:13	3
29485	99	30	2,23	cyclictest	27608	-1	kworker/u9:1	23:57:43	2
29485	99	30	2,20	cyclictest	273	46	irq/40-dwc2_hso	22:50:15	2
29475	99	30	3,19	cyclictest	17691	-21	ssh	23:35:11	1
29493	99	29	19,7	cyclictest	359	66	irq/58-eth0	22:00:14	3
29485	99	29	4,6	cyclictest	28436	-21	ssh	00:35:14	2
29485	99	29	4,19	cyclictest	273	46	irq/40-dwc2_hso	22:05:15	2
29475	99	29	17,8	cyclictest	15063	-21	diskmemload	22:40:17	1
29475	99	29	11,13	cyclictest	15545	-21	kworker/u8:2	23:57:43	1
29466	99	29	14,10	cyclictest	8591	-21	sh	22:00:13	0
29493	99	28	4,17	cyclictest	0	-21	swapper/3	21:25:13	3
29493	99	28	3,13	cyclictest	359	66	irq/58-eth0	22:45:12	3
29493	99	28	1,16	cyclictest	359	66	irq/58-eth0	23:10:12	3
29485	99	28	3,16	cyclictest	273	46	irq/40-dwc2_hso	21:20:14	2
29485	99	28	2,17	cyclictest	273	46	irq/40-dwc2_hso	21:40:12	2
29485	99	28	2,17	cyclictest	273	46	irq/40-dwc2_hso	20:30:13	2
29485	99	28	2,15	cyclictest	273	46	irq/40-dwc2_hso	21:15:13	2
29485	99	28	2,11	cyclictest	30536	-21	ssh	00:00:15	2
29485	99	28	2,11	cyclictest	0	-21	swapper/2	20:10:13	2
29485	99	28	1,21	cyclictest	0	-21	swapper/2	20:25:14	2
29485	99	28	1,20	cyclictest	273	46	irq/40-dwc2_hso	22:15:13	2
29485	99	28	1,20	cyclictest	273	46	irq/40-dwc2_hso	22:15:13	2
29475	99	28	1,16	cyclictest	4814	-21	ssh	21:40:13	1
29466	99	28	2,20	cyclictest	31593	-21	ssh	23:24:57	0
29466	99	28	1,21	cyclictest	6930	-21	ssh	22:35:14	0
29493	99	27	5,19	cyclictest	0	-21	swapper/3	00:10:15	3
29493	99	27	5,19	cyclictest	0	-21	swapper/3	00:10:14	3
29493	99	27	4,13	cyclictest	0	-21	swapper/3	00:25:13	3
29493	99	27	18,5	cyclictest	32	1	rcuc/3	20:05:14	3
29493	99	27	14,6	cyclictest	360	66	irq/59-eth0	23:55:12	3
29493	99	27	12,6	cyclictest	0	-21	swapper/3	21:05:13	3
29493	99	27	1,18	cyclictest	0	-21	swapper/3	21:20:13	3
29485	99	27	3,16	cyclictest	273	46	irq/40-dwc2_hso	20:35:13	2
29485	99	27	2,19	cyclictest	0	-21	swapper/2	22:30:14	2
29485	99	27	1,15	cyclictest	28209	-21	ssh	21:35:14	2
29475	99	27	3,15	cyclictest	21274	-21	ssh	22:25:13	1
29475	99	27	15,7	cyclictest	21	-21	ksoftirqd/1	21:05:13	1
29475	99	27	1,22	cyclictest	14124	-21	ssh	23:15:13	1
29466	99	27	2,22	cyclictest	26642	-21	ssh	22:10:15	0
29466	99	27	2,22	cyclictest	26642	-21	ssh	22:10:14	0
29493	99	26	3,15	cyclictest	0	-21	swapper/3	23:20:14	3
29493	99	26	2,14	cyclictest	359	66	irq/58-eth0	21:35:13	3
29493	99	26	16,6	cyclictest	0	-21	swapper/3	19:30:13	3
29485	99	26	3,12	cyclictest	273	46	irq/40-dwc2_hso	20:55:13	2
29485	99	26	2,18	cyclictest	8309	-21	ssh	00:22:56	2
29485	99	26	1,14	cyclictest	23906	-21	ls	20:45:18	2
29485	99	26	1,13	cyclictest	10550	-21	sh	22:55:14	2
29475	99	26	13,10	cyclictest	7217	-21	ssh	23:45:27	1
29466	99	26	2,19	cyclictest	1203	-21	sh	21:20:15	0
29466	99	26	2,18	cyclictest	16429	-21	ssh	23:33:55	0
29466	99	26	13,6	cyclictest	0	-21	swapper/0	21:55:11	0
29466	99	26	1,18	cyclictest	19510	-21	sh	23:00:13	0
29493	99	25	2,17	cyclictest	360	66	irq/59-eth0	21:10:13	3
29485	99	25	2,8	cyclictest	15063	-21	diskmemload	23:19:56	2
29485	99	25	1,17	cyclictest	273	46	irq/40-dwc2_hso	20:20:12	2
29475	99	25	3,19	cyclictest	7058	-21	ssh	00:05:15	1
29475	99	25	1,18	cyclictest	23087	-21	ssh	23:20:14	1
29475	99	25	10,7	cyclictest	48	-21	kcompactd0	20:50:12	1
29493	99	24	3,13	cyclictest	0	-21	swapper/3	23:35:12	3
29493	99	24	1,14	cyclictest	359	66	irq/58-eth0	00:35:13	3
29485	99	24	2,17	cyclictest	273	46	irq/40-dwc2_hso	00:15:14	2
29485	99	24	2,17	cyclictest	273	46	irq/40-dwc2_hso	00:15:14	2
29485	99	24	2,17	cyclictest	0	-21	swapper/2	23:53:57	2
29485	99	24	12,4	cyclictest	7034	-21	ntp_states	23:45:25	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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