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 Wed Aug 19, 2026 00:45:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
13258	99	60	1,39	cyclictest	6947	-21	ssh	23:55:14	2
13258	99	60	1,39	cyclictest	6947	-21	ssh	23:55:13	2
13258	99	57	39,12	cyclictest	14164	-21	sh	00:35:13	2
13258	99	55	1,38	cyclictest	21290	-21	ssh	23:45:13	2
13258	99	53	1,38	cyclictest	4837	-21	ssh	23:00:16	2
13258	99	46	1,29	cyclictest	25008	-21	ssh	00:05:16	2
13238	99	44	20,7	cyclictest	12	-21	ksoftirqd/0	20:35:13	0
13258	99	43	1,33	cyclictest	16012	-21	ssh	00:00:14	2
13238	99	43	1,40	cyclictest	3517	-21	ssh	21:30:13	0
13273	99	42	35,4	cyclictest	359	66	irq/58-eth0	22:40:12	3
13258	99	42	5,27	cyclictest	27	-21	ksoftirqd/2	22:35:14	2
13247	99	41	1,34	cyclictest	0	-21	swapper/1	19:45:14	1
13238	99	41	28,9	cyclictest	12	-21	ksoftirqd/0	00:30:13	0
13238	99	40	3,24	cyclictest	16456	-21	ssh	21:55:13	0
13238	99	39	14,5	cyclictest	13	1	rcu_preempt	22:35:14	0
13258	99	37	1,26	cyclictest	11293	-21	ssh	22:10:13	2
13247	99	37	5,29	cyclictest	28544	-21	ssh	00:25:13	1
13247	99	37	5,28	cyclictest	29564	-21	ssh	22:20:15	1
13238	99	37	5,3	cyclictest	13	1	rcu_preempt	21:20:15	0
13258	99	36	2,27	cyclictest	0	-21	swapper/2	22:55:13	2
13258	99	36	2,27	cyclictest	0	-21	swapper/2	22:55:12	2
13273	99	35	24,7	cyclictest	359	66	irq/58-eth0	22:50:15	3
13247	99	35	1,32	cyclictest	10607	-21	ssh	00:15:14	1
13238	99	34	21,5	cyclictest	12	-21	ksoftirqd/0	23:25:11	0
13247	99	33	1,3	cyclictest	13	1	rcu_preempt	23:30:13	1
13238	99	33	1,28	cyclictest	19575	-21	ssh	00:20:11	0
13238	99	33	1,26	cyclictest	29542	-21	sh	22:20:15	0
13258	99	32	17,5	cyclictest	26	1	rcuc/2	22:45:13	2
13273	99	31	4,17	cyclictest	359	66	irq/58-eth0	20:40:14	3
13258	99	31	1,14	cyclictest	26758	-21	ssh	21:25:13	2
13238	99	31	2,24	cyclictest	10613	-21	ssh	00:15:16	0
13273	99	30	3,16	cyclictest	359	66	irq/58-eth0	21:45:14	3
13273	99	30	2,19	cyclictest	359	66	irq/58-eth0	21:40:13	3
13273	99	30	2,19	cyclictest	359	66	irq/58-eth0	21:40:12	3
13273	99	30	17,8	cyclictest	359	66	irq/58-eth0	22:20:29	3
13273	99	30	1,18	cyclictest	359	66	irq/58-eth0	21:15:13	3
13273	99	29	4,20	cyclictest	359	66	irq/58-eth0	00:00:14	3
13273	99	29	14,9	cyclictest	359	66	irq/58-eth0	23:25:13	3
13273	99	29	11,12	cyclictest	359	66	irq/58-eth0	21:30:14	3
13258	99	29	3,19	cyclictest	273	46	irq/40-dwc2_hso	20:20:13	2
13258	99	29	3,11	cyclictest	0	-21	swapper/2	20:45:05	2
13258	99	29	1,10	cyclictest	808	-21	ssh	22:40:12	2
13247	99	29	1,24	cyclictest	8547	-21	ssh	23:20:10	1
13238	99	29	2,21	cyclictest	30304	-21	ssh	23:50:13	0
13238	99	29	2,21	cyclictest	30304	-21	ssh	23:50:12	0
13258	99	28	2,17	cyclictest	273	46	irq/40-dwc2_hso	23:35:13	2
13258	99	28	1,16	cyclictest	17640	-21	ssh	23:25:13	2
13273	99	27	2,15	cyclictest	359	66	irq/58-eth0	23:50:13	3
13273	99	27	2,15	cyclictest	359	66	irq/58-eth0	23:50:12	3
13258	99	27	5,13	cyclictest	273	46	irq/40-dwc2_hso	20:10:14	2
13258	99	27	0,18	cyclictest	30553	-21	uniq	23:50:17	2
13258	99	27	0,18	cyclictest	30553	-21	uniq	23:50:17	2
13247	99	27	13,10	cyclictest	0	-21	swapper/1	00:20:12	1
13238	99	27	5,20	cyclictest	20387	-21	ssh	22:15:12	0
13273	99	26	4,14	cyclictest	0	-21	swapper/3	23:45:13	3
13258	99	26	2,17	cyclictest	21704	-21	rm	21:40:13	2
13258	99	26	2,17	cyclictest	21704	-21	rm	21:40:12	2
13258	99	26	2,15	cyclictest	12368	-21	ssh	23:40:14	2
13258	99	26	2,14	cyclictest	8596	-21	ssh	21:15:12	2
13247	99	26	13,5	cyclictest	21	-21	ksoftirqd/1	23:35:13	1
13273	99	25	2,18	cyclictest	359	66	irq/58-eth0	00:25:14	3
13273	99	25	2,18	cyclictest	0	-21	swapper/3	23:35:12	3
13273	99	25	1,15	cyclictest	359	66	irq/58-eth0	22:35:14	3
13258	99	25	6,9	cyclictest	2892	-21	cron	23:35:01	2
13258	99	25	3,13	cyclictest	273	46	irq/40-dwc2_hso	22:25:14	2
13247	99	25	3,18	cyclictest	20417	-21	ssh	22:15:14	1
13273	99	24	4,17	cyclictest	359	66	irq/58-eth0	21:25:14	3
13273	99	24	3,18	cyclictest	359	66	irq/58-eth0	21:20:16	3
13273	99	24	2,5	cyclictest	0	-21	swapper/3	22:10:15	3
13273	99	24	2,15	cyclictest	359	66	irq/58-eth0	00:20:11	3
13273	99	24	1,18	cyclictest	0	-21	swapper/3	23:40:14	3
13273	99	24	1,17	cyclictest	0	-21	swapper/3	20:30:14	3
13258	99	24	8,11	cyclictest	26863	-21	latency_hist	21:05:02	2
13258	99	24	2,11	cyclictest	0	-21	swapper/2	21:45:16	2
13258	99	24	1,15	cyclictest	17739	-21	ssh	21:20:17	2
13258	99	24	11,4	cyclictest	25132	-21	sh	22:00:02	2
13247	99	24	1,19	cyclictest	2159	-21	ssh	22:05:13	1
13247	99	24	1,18	cyclictest	5146	-21	rm	00:30:13	1
13238	99	24	16,6	cyclictest	13406	-21	ssh	23:20:30	0
13273	99	23	3,13	cyclictest	0	-21	swapper/3	22:30:14	3
13273	99	23	3,13	cyclictest	0	-21	swapper/3	22:30:13	3
13273	99	23	3,10	cyclictest	0	-21	swapper/3	00:35:12	3
13273	99	23	2,15	cyclictest	359	66	irq/58-eth0	23:30:14	3
13258	99	23	3,14	cyclictest	273	46	irq/40-dwc2_hso	00:10:16	2
13258	99	23	3,13	cyclictest	273	46	irq/40-dwc2_hso	20:15:15	2
13258	99	23	2,6	cyclictest	0	-21	swapper/2	00:30:14	2
13258	99	23	2,6	cyclictest	0	-21	swapper/2	00:28:14	2
13258	99	23	2,14	cyclictest	273	46	irq/40-dwc2_hso	21:35:14	2
13258	99	23	18,3	cyclictest	14983	-21	ssh	00:15:32	2
13258	99	23	12,9	cyclictest	5643	-21	ssh	22:24:51	2
13258	99	23	1,14	cyclictest	273	46	irq/40-dwc2_hso	19:30:13	2
13247	99	23	4,11	cyclictest	0	-21	swapper/1	21:00:14	1
13247	99	23	2,15	cyclictest	3510	-21	diskmemload	21:30:13	1
13238	99	23	4,15	cyclictest	21311	-21	ssh	23:45:14	0
13238	99	23	2,16	cyclictest	19582	-21	apt-get	19:50:12	0
13238	99	23	16,5	cyclictest	2178	-21	ssh	22:05:14	0
13273	99	22	5,12	cyclictest	0	-21	swapper/3	21:10:14	3
13273	99	22	3,16	cyclictest	0	-21	swapper/3	23:05:14	3
13273	99	22	2,11	cyclictest	0	-21	swapper/3	22:15:14	3
13273	99	22	13,6	cyclictest	359	66	irq/58-eth0	23:20:13	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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