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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 Aug 24, 2026 00:45:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
8419	99	68	2,17	cyclictest	13	1	rcu_preempt	21:35:13	2
8419	99	51	7,16	cyclictest	13	1	rcu_preempt	23:20:12	2
8402	99	49	2,43	cyclictest	29655	-21	ssh	22:05:14	0
8411	99	48	3,9	cyclictest	13	1	rcu_preempt	20:30:12	1
8402	99	48	4,36	cyclictest	5648	-21	ssh	00:15:13	0
8402	99	47	4,38	cyclictest	15334	-21	ssh	22:15:13	0
8427	99	44	2,26	cyclictest	359	66	irq/58-eth0	23:15:13	3
8402	99	44	5,32	cyclictest	24347	-21	ssh	22:20:14	0
8411	99	43	17,17	cyclictest	21	-21	ksoftirqd/1	23:15:11	1
8411	99	40	9,23	cyclictest	21	-21	ksoftirqd/1	23:20:13	1
8419	99	39	1,23	cyclictest	6243	-21	sshd	20:15:14	2
8427	99	37	29,5	cyclictest	0	-21	swapper/3	23:25:11	3
8419	99	37	13,19	cyclictest	21472	-21	ssh	23:30:15	2
8411	99	37	4,21	cyclictest	28020	-21	ssh	22:40:13	1
8402	99	37	20,12	cyclictest	12	-21	ksoftirqd/0	00:13:27	0
8402	99	37	20,12	cyclictest	12	-21	ksoftirqd/0	00:13:27	0
8411	99	36	12,16	cyclictest	24073	-1	kworker/u9:1	23:35:15	1
8402	99	35	5,18	cyclictest	0	-21	swapper/0	22:45:14	0
8419	99	34	2,20	cyclictest	25262	-21	ssh	23:50:14	2
8411	99	34	3,22	cyclictest	21	-21	ksoftirqd/1	23:30:15	1
8402	99	34	2,22	cyclictest	14707	-21	ssh	00:20:14	0
8402	99	34	2,19	cyclictest	7171	-21	ssh	23:40:11	0
8427	99	33	20,10	cyclictest	359	66	irq/58-eth0	22:50:12	3
8411	99	33	13,2	cyclictest	21	-21	ksoftirqd/1	00:05:14	1
8402	99	33	4,22	cyclictest	12	-21	ksoftirqd/0	21:25:14	0
8427	99	32	15,10	cyclictest	0	-21	swapper/3	00:30:14	3
8411	99	32	3,23	cyclictest	20607	-21	ssh	22:00:13	1
8411	99	32	13,8	cyclictest	21	-21	ksoftirqd/1	23:05:13	1
8402	99	32	1,5	cyclictest	0	-21	swapper/0	19:25:15	0
8419	99	31	6,10	cyclictest	27	-21	ksoftirqd/2	20:45:14	2
8419	99	31	4,17	cyclictest	13	1	rcu_preempt	00:25:15	2
8411	99	31	2,22	cyclictest	11034	-21	sshd	00:00:14	1
8411	99	31	16,11	cyclictest	0	-21	swapper/1	20:15:14	1
8411	99	31	1,2	cyclictest	13	1	rcu_preempt	22:55:16	1
8402	99	31	2,22	cyclictest	8553	-21	ssh	00:34:36	0
8411	99	30	0,23	cyclictest	0	-21	swapper/1	20:10:12	1
8402	99	30	2,14	cyclictest	25880	-21	ssh	21:45:14	0
8419	99	29	2,21	cyclictest	2087	-21	df	23:55:16	2
8402	99	29	3,19	cyclictest	26577	-21	diskmemload	23:00:15	0
8402	99	29	17,6	cyclictest	26577	-21	diskmemload	21:10:13	0
8427	99	28	5,10	cyclictest	359	66	irq/58-eth0	00:05:14	3
8427	99	28	2,17	cyclictest	359	66	irq/58-eth0	21:25:13	3
8427	99	28	1,17	cyclictest	359	66	irq/58-eth0	22:05:15	3
8419	99	28	8,3	cyclictest	0	-21	swapper/2	23:15:12	2
8419	99	28	3,17	cyclictest	273	46	irq/40-dwc2_hso	21:50:12	2
8419	99	28	11,12	cyclictest	4697	-21	sshd	22:45:15	2
8411	99	28	2,20	cyclictest	1995	-21	ssh	23:55:15	1
8411	99	28	1,18	cyclictest	17359	-21	ssh	22:50:24	1
8427	99	27	3,19	cyclictest	359	66	irq/58-eth0	22:55:15	3
8427	99	27	3,18	cyclictest	359	66	irq/58-eth0	20:55:12	3
8427	99	27	1,16	cyclictest	359	66	irq/58-eth0	19:20:13	3
8419	99	27	2,9	cyclictest	13	1	rcu_preempt	21:10:03	2
8419	99	27	2,20	cyclictest	0	-21	swapper/2	00:00:15	2
8419	99	27	1,7	cyclictest	13	1	rcu_preempt	23:25:12	2
8419	99	27	13,10	cyclictest	7413	-21	sh	23:40:14	2
8419	99	27	1,18	cyclictest	273	46	irq/40-dwc2_hso	23:35:14	2
8411	99	27	15,6	cyclictest	0	-21	swapper/1	21:15:15	1
8411	99	27	14,7	cyclictest	1	-21	systemd	22:45:14	1
8402	99	27	3,16	cyclictest	3720	-21	ssh	21:15:13	0
8402	99	27	15,8	cyclictest	12	-21	ksoftirqd/0	22:50:12	0
8427	99	26	3,17	cyclictest	0	-21	swapper/3	23:55:16	3
8427	99	26	2,18	cyclictest	359	66	irq/58-eth0	22:20:13	3
8419	99	26	3,16	cyclictest	273	46	irq/40-dwc2_hso	22:25:13	2
8419	99	26	2,16	cyclictest	273	46	irq/40-dwc2_hso	22:40:13	2
8411	99	26	11,9	cyclictest	8394	-21	cyclictest	22:30:13	1
8411	99	26	11,9	cyclictest	8394	-21	cyclictest	22:30:13	1
8402	99	26	11,10	cyclictest	12	-21	ksoftirqd/0	20:05:14	0
8427	99	25	3,14	cyclictest	0	-21	swapper/3	23:45:12	3
8427	99	25	12,7	cyclictest	0	-21	swapper/3	19:25:14	3
8419	99	25	7,7	cyclictest	13	1	rcu_preempt	20:50:28	2
8419	99	25	6,9	cyclictest	23607	-21	cut	22:00:22	2
8419	99	25	6,12	cyclictest	27	-21	ksoftirqd/2	20:25:12	2
8419	99	25	3,15	cyclictest	273	46	irq/40-dwc2_hso	22:30:12	2
8419	99	25	3,15	cyclictest	273	46	irq/40-dwc2_hso	22:30:11	2
8419	99	25	2,6	cyclictest	0	-21	swapper/2	00:39:34	2
8419	99	25	1,16	cyclictest	273	46	irq/40-dwc2_hso	22:35:12	2
8419	99	25	0,18	cyclictest	273	46	irq/40-dwc2_hso	19:20:13	2
8411	99	25	2,18	cyclictest	12410	-21	ssh	23:25:12	1
8402	99	25	5,15	cyclictest	0	-21	swapper/0	00:05:15	0
8402	99	25	14,5	cyclictest	0	-21	swapper/0	23:45:12	0
8402	99	25	12,7	cyclictest	0	-21	swapper/0	21:37:03	0
8427	99	24	9,11	cyclictest	0	-21	swapper/3	00:23:35	3
8427	99	24	8,10	cyclictest	0	-21	swapper/3	00:39:35	3
8427	99	24	2,18	cyclictest	359	66	irq/58-eth0	20:25:13	3
8419	99	24	3,16	cyclictest	0	-21	swapper/2	00:24:35	2
8419	99	24	14,8	cyclictest	0	-21	swapper/2	23:45:15	2
8411	99	24	3,4	cyclictest	13	1	rcu_preempt	23:50:13	1
8411	99	24	15,6	cyclictest	29120	-21	ssh	00:10:15	1
8411	99	24	15,6	cyclictest	29120	-21	ssh	00:10:14	1
8411	99	24	13,7	cyclictest	26577	-21	diskmemload	00:25:16	1
8402	99	24	9,7	cyclictest	0	-21	swapper/0	23:23:47	0
8402	99	24	7,6	cyclictest	12	-21	ksoftirqd/0	21:31:06	0
8402	99	24	4,5	cyclictest	12	-21	ksoftirqd/0	19:15:19	0
8402	99	24	3,14	cyclictest	17592	-21	ssh	23:10:14	0
8402	99	24	2,16	cyclictest	11566	-21	ssh	21:55:14	0
8402	99	24	10,6	cyclictest	12	-21	ksoftirqd/0	21:21:48	0
8402	99	24	10,5	cyclictest	0	-21	swapper/0	21:53:10	0
8427	99	23	8,10	cyclictest	359	66	irq/58-eth0	23:35:15	3
8427	99	23	2,15	cyclictest	359	66	irq/58-eth0	21:30:13	3
8419	99	23	6,7	cyclictest	14313	-21	grep	00:20:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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