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 Jul 27, 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
16037	99	46	37,6	cyclictest	359	66	irq/58-eth0	00:25:16	3
16037	99	46	36,7	cyclictest	359	66	irq/58-eth0	23:50:12	3
16037	99	46	35,7	cyclictest	359	66	irq/58-eth0	21:40:14	3
16037	99	46	31,11	cyclictest	359	66	irq/58-eth0	00:00:15	3
16037	99	46	31,11	cyclictest	359	66	irq/58-eth0	00:00:14	3
16021	99	39	1,32	cyclictest	12064	-21	ssh	00:15:14	1
16013	99	39	7,22	cyclictest	12	-21	ksoftirqd/0	21:35:15	0
16021	99	38	3,26	cyclictest	15531	-21	ssh	23:05:13	1
16037	99	37	5,24	cyclictest	359	66	irq/58-eth0	19:15:15	3
16037	99	36	3,28	cyclictest	359	66	irq/58-eth0	19:10:12	3
16037	99	36	3,20	cyclictest	359	66	irq/58-eth0	20:25:12	3
16037	99	36	19,10	cyclictest	359	66	irq/58-eth0	23:45:14	3
16021	99	35	2,3	cyclictest	13	1	rcu_preempt	22:00:12	1
16037	99	34	3,21	cyclictest	359	66	irq/58-eth0	21:20:15	3
16029	99	34	1,24	cyclictest	22742	-21	ssh	23:45:14	2
16021	99	34	0,26	cyclictest	8175	-21	ssh	23:55:13	1
16037	99	33	17,9	cyclictest	359	66	irq/58-eth0	22:25:13	3
16029	99	32	1,28	cyclictest	3121	-21	rm	00:10:17	2
16029	99	32	1,22	cyclictest	13707	-21	sh	22:10:12	2
16029	99	32	1,22	cyclictest	13707	-21	sh	22:10:12	2
16037	99	30	4,14	cyclictest	359	66	irq/58-eth0	22:20:14	3
16029	99	30	1,21	cyclictest	10186	-21	ssh	23:20:14	2
16013	99	30	4,16	cyclictest	6587	-21	ssh	00:30:14	0
16029	99	29	3,22	cyclictest	26	1	rcuc/2	20:40:12	2
16029	99	29	1,15	cyclictest	1866	-21	diskmemload	22:15:14	2
16029	99	29	11,15	cyclictest	27	-21	ksoftirqd/2	00:05:14	2
16037	99	28	9,12	cyclictest	359	66	irq/58-eth0	23:10:13	3
16037	99	28	5,13	cyclictest	359	66	irq/58-eth0	21:30:12	3
16037	99	28	12,10	cyclictest	359	66	irq/58-eth0	22:10:13	3
16037	99	28	12,10	cyclictest	359	66	irq/58-eth0	22:10:13	3
16037	99	27	8,10	cyclictest	0	-21	swapper/3	21:10:14	3
16037	99	27	1,15	cyclictest	359	66	irq/58-eth0	21:45:13	3
16021	99	27	5,13	cyclictest	21	-21	ksoftirqd/1	23:10:11	1
16021	99	27	2,19	cyclictest	6292	-21	ssh	21:46:07	1
16021	99	27	19,5	cyclictest	0	-21	swapper/1	23:25:14	1
16021	99	27	19,5	cyclictest	0	-21	swapper/1	23:25:14	1
16037	99	26	4,15	cyclictest	0	-21	swapper/3	23:40:15	3
16037	99	26	4,13	cyclictest	0	-21	swapper/3	22:30:16	3
16037	99	26	1,17	cyclictest	0	-21	swapper/3	00:10:16	3
16029	99	26	2,20	cyclictest	15555	-21	ssh	23:05:15	2
16029	99	26	2,15	cyclictest	17363	-21	ssh	22:30:14	2
16029	99	26	10,5	cyclictest	13	1	rcu_preempt	22:40:12	2
16029	99	26	10,12	cyclictest	19654	-21	sshd	19:10:26	2
16021	99	26	2,19	cyclictest	28025	-21	ntp_states	21:40:27	1
16021	99	26	1,20	cyclictest	11443	-21	ssh	21:15:16	1
16013	99	26	2,15	cyclictest	11437	-21	sh	21:15:16	0
16037	99	25	3,19	cyclictest	359	66	irq/58-eth0	21:15:16	3
16037	99	25	3,17	cyclictest	0	-21	swapper/3	22:05:12	3
16037	99	25	3,16	cyclictest	359	66	irq/58-eth0	23:20:15	3
16037	99	25	13,8	cyclictest	0	-21	swapper/3	21:35:22	3
16029	99	25	2,19	cyclictest	273	46	irq/40-dwc2_hso	23:30:14	2
16029	99	25	2,18	cyclictest	20472	-21	ssh	21:20:16	2
16029	99	25	20,3	cyclictest	273	46	irq/40-dwc2_hso	21:30:11	2
16029	99	25	12,10	cyclictest	3258	-21	kthreadcore	21:45:22	2
16029	99	25	1,20	cyclictest	26377	-21	ssh	22:35:16	2
16021	99	25	11,9	cyclictest	28221	-21	df	23:30:15	1
16013	99	25	2,18	cyclictest	31744	-21	apt-get	22:20:12	0
16037	99	24	3,14	cyclictest	0	-21	swapper/3	22:35:16	3
16037	99	24	3,13	cyclictest	359	66	irq/58-eth0	20:10:14	3
16037	99	24	3,13	cyclictest	0	-21	swapper/3	21:55:13	3
16037	99	24	3,12	cyclictest	0	-21	swapper/3	22:40:15	3
16037	99	24	2,15	cyclictest	0	-21	swapper/3	00:30:15	3
16029	99	24	3,17	cyclictest	273	46	irq/40-dwc2_hso	19:30:13	2
16029	99	24	3,17	cyclictest	273	46	irq/40-dwc2_hso	00:00:15	2
16029	99	24	3,17	cyclictest	273	46	irq/40-dwc2_hso	00:00:14	2
16029	99	24	3,14	cyclictest	273	46	irq/40-dwc2_hso	20:35:14	2
16029	99	24	2,14	cyclictest	273	46	irq/40-dwc2_hso	19:35:15	2
16029	99	24	18,4	cyclictest	20071	-21	ssh	21:35:34	2
16029	99	24	16,6	cyclictest	1990	-21	ssh	21:10:02	2
16029	99	24	13,8	cyclictest	0	-21	swapper/2	23:40:20	2
16029	99	24	11,5	cyclictest	12119	-21	sshd	23:01:23	2
16021	99	24	9,3	cyclictest	1866	-21	diskmemload	23:15:45	1
16021	99	24	7,4	cyclictest	13	1	rcu_preempt	21:35:22	1
16021	99	24	15,5	cyclictest	0	-21	swapper/1	21:50:13	1
16013	99	24	8,3	cyclictest	13	1	rcu_preempt	22:00:16	0
16013	99	24	5,12	cyclictest	17353	-21	ssh	22:30:14	0
16013	99	24	2,16	cyclictest	19180	-21	rm	23:25:16	0
16013	99	24	2,16	cyclictest	19180	-21	rm	23:25:15	0
16013	99	24	10,3	cyclictest	12	-21	ksoftirqd/0	19:45:15	0
16037	99	23	4,13	cyclictest	0	-21	swapper/3	00:35:14	3
16037	99	23	3,13	cyclictest	0	-21	swapper/3	22:45:14	3
16037	99	23	2,13	cyclictest	359	66	irq/58-eth0	23:55:12	3
16029	99	23	9,11	cyclictest	28381	-21	hwlatdetect	22:00:17	2
16029	99	23	5,11	cyclictest	273	46	irq/40-dwc2_hso	00:20:13	2
16029	99	23	3,15	cyclictest	0	-21	swapper/2	20:00:12	2
16029	99	23	3,14	cyclictest	273	46	irq/40-dwc2_hso	19:20:13	2
16029	99	23	2,16	cyclictest	19185	-21	ssh	21:55:15	2
16029	99	23	2,13	cyclictest	0	-21	swapper/2	20:25:12	2
16029	99	23	17,3	cyclictest	2285	-21	ssh	21:10:15	2
16029	99	23	1,13	cyclictest	930	-21	snmpd	22:05:12	2
16021	99	23	10,4	cyclictest	1866	-21	diskmemload	22:18:08	1
16013	99	23	15,6	cyclictest	0	-21	swapper/0	23:20:28	0
16037	99	22	5,10	cyclictest	0	-21	swapper/3	23:00:14	3
16037	99	22	3,12	cyclictest	0	-21	swapper/3	22:15:14	3
16037	99	22	2,16	cyclictest	359	66	irq/58-eth0	23:35:16	3
16029	99	22	4,15	cyclictest	273	46	irq/40-dwc2_hso	20:30:12	2
16029	99	22	4,13	cyclictest	27	-21	ksoftirqd/2	20:45:11	2
16029	99	22	2,18	cyclictest	0	-21	swapper/2	21:54:26	2
16029	99	22	11,9	cyclictest	3455	-21	ssh	21:27:23	2
16029	99	22	1,18	cyclictest	1686	-21	sed	22:55:31	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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