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 Tue Sep 15, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
11293	99	74	6,46	cyclictest	3628	-21	ssh	22:25:13	0
11311	99	67	6,16	cyclictest	27	-21	ksoftirqd/2	23:35:12	2
11302	99	55	2,35	cyclictest	21683	-21	ssh	22:35:13	1
11293	99	51	5,32	cyclictest	13	1	rcu_preempt	22:40:13	0
11293	99	51	2,34	cyclictest	23170	-21	ssh	22:00:13	0
11302	99	49	18,21	cyclictest	0	-21	swapper/1	19:55:13	1
11302	99	49	1,37	cyclictest	18741	-21	ssh	23:45:12	1
11311	99	47	1,33	cyclictest	29572	-21	ssh	21:10:14	2
11302	99	47	33,10	cyclictest	23362	-21	apt-get	20:30:14	1
11302	99	46	39,3	cyclictest	10179	-21	apt-get	20:50:13	1
11302	99	46	29,13	cyclictest	946	-21	ssh	21:30:14	1
11322	99	44	39,3	cyclictest	359	66	irq/58-eth0	22:35:13	3
11322	99	43	3,22	cyclictest	359	66	irq/58-eth0	00:35:12	3
11302	99	43	17,11	cyclictest	13613	-21	fschecks_time	00:00:17	1
11293	99	43	1,30	cyclictest	532	-21	ssh	23:35:12	0
11302	99	42	16,8	cyclictest	8622	-21	ntp_states	21:50:27	1
11302	99	42	15,8	cyclictest	23158	-21	apt-get	22:00:14	1
11302	99	41	35,2	cyclictest	2985	-21	apt-get	19:35:13	1
11302	99	41	31,7	cyclictest	5895	-21	ssh	23:20:15	1
11302	99	41	17,9	cyclictest	31498	-21	apt-get	00:10:14	1
11302	99	41	17,12	cyclictest	22600	-21	ssh	23:28:57	1
11302	99	41	14,10	cyclictest	12656	-21	/usr/sbin/munin	22:30:18	1
11322	99	40	3,24	cyclictest	359	66	irq/58-eth0	00:10:14	3
11302	99	40	14,10	cyclictest	18705	-21	ssh	00:37:54	1
11302	99	40	13,8	cyclictest	27042	-21	grep	22:20:14	1
11302	99	40	13,11	cyclictest	22320	-21	ssh	23:10:20	1
11302	99	39	29,7	cyclictest	32192	-21	ssh	22:05:12	1
11302	99	39	15,10	cyclictest	3342	-21	ssh	23:17:33	1
11302	99	39	13,9	cyclictest	3946	-21	apt	23:55:02	1
11302	99	39	13,9	cyclictest	30608	-21	sed	19:30:02	1
11302	99	39	13,8	cyclictest	0	-21	swapper/1	23:55:35	1
11302	99	39	13,11	cyclictest	2143	-21	grep	23:00:15	1
11302	99	39	10,11	cyclictest	21710	-21	ssh	21:58:47	1
11302	99	38	15,10	cyclictest	28449	-21	fschecks_time	21:45:16	1
11302	99	38	15,10	cyclictest	28449	-21	fschecks_time	21:45:15	1
11302	99	38	15,10	cyclictest	12425	-21	ssh	22:30:01	1
11302	99	38	14,9	cyclictest	8734	-21	kthreadcore	22:45:17	1
11302	99	38	13,11	cyclictest	20536	-21	cut	22:15:19	1
11302	99	38	13,10	cyclictest	19931	-21	cat	21:20:30	1
11302	99	38	10,12	cyclictest	5352	-21	/usr/sbin/munin	20:45:16	1
11293	99	38	2,22	cyclictest	13	1	rcu_preempt	21:15:13	0
11293	99	38	21,10	cyclictest	13	1	rcu_preempt	23:00:12	0
11293	99	38	1,28	cyclictest	31510	-21	ssh	00:10:13	0
11302	99	37	21,13	cyclictest	0	-21	swapper/1	20:35:12	1
11302	99	37	21,12	cyclictest	0	-21	swapper/1	22:50:12	1
11302	99	37	16,8	cyclictest	22642	-21	grep	00:05:16	1
11302	99	37	13,8	cyclictest	13675	-21	ssh	21:18:36	1
11293	99	37	3,23	cyclictest	8122	-21	ssh	00:15:13	0
11293	99	37	1,26	cyclictest	10050	-21	ssh	21:35:13	0
11302	99	36	30,3	cyclictest	9608	-21	apt-get	23:40:13	1
11302	99	36	24,9	cyclictest	2889	-21	ssh	00:30:14	1
11302	99	36	21,12	cyclictest	0	-21	swapper/1	22:55:13	1
11302	99	36	21,12	cyclictest	0	-21	swapper/1	22:55:12	1
11302	99	36	16,15	cyclictest	0	-21	swapper/1	21:40:13	1
11302	99	36	16,10	cyclictest	19333	-21	kthreadcore	20:25:19	1
11302	99	36	15,8	cyclictest	29405	-21	ssh	21:25:49	1
11302	99	36	15,7	cyclictest	29149	-21	diskmemload	00:28:25	1
11302	99	36	14,8	cyclictest	8807	-21	cat	20:15:02	1
11302	99	36	13,7	cyclictest	0	-21	swapper/1	22:11:25	1
11302	99	36	11,8	cyclictest	0	-21	swapper/1	23:09:42	1
11293	99	36	3,25	cyclictest	8867	-21	sh	22:10:12	0
11293	99	36	2,27	cyclictest	4901	-21	ssh	21:50:13	0
11322	99	35	5,17	cyclictest	359	66	irq/58-eth0	23:05:12	3
11302	99	35	13,10	cyclictest	16137	-21	kthreadcore	20:55:18	1
11302	99	35	11,8	cyclictest	14980	-21	sshd	00:17:53	1
11302	99	35	11,10	cyclictest	22604	-21	kthreadcore	19:20:19	1
11302	99	35	10,11	cyclictest	15325	-21	grep	19:45:21	1
11293	99	35	5,22	cyclictest	12	-21	ksoftirqd/0	23:20:14	0
11293	99	35	19,6	cyclictest	0	-21	swapper/0	22:15:12	0
11293	99	35	1,26	cyclictest	7346	-21	ssh	22:45:10	0
11311	99	34	1,26	cyclictest	0	-21	swapper/2	20:25:12	2
11302	99	34	14,8	cyclictest	522	-21	apt-get	23:35:12	1
11302	99	34	12,8	cyclictest	2755	-21	ssh	21:11:28	1
11302	99	34	12,10	cyclictest	10703	-21	cut	19:40:24	1
11302	99	34	11,7	cyclictest	0	-21	swapper/1	21:37:57	1
11322	99	33	21,8	cyclictest	359	66	irq/58-eth0	21:50:13	3
11311	99	33	3,12	cyclictest	23185	-21	ssh	22:00:15	2
11311	99	33	18,10	cyclictest	0	-21	swapper/2	21:30:15	2
11302	99	33	25,5	cyclictest	11446	-21	apt-get	19:10:12	1
11302	99	33	22,8	cyclictest	32705	-21	apt-get	20:40:05	1
11302	99	33	16,13	cyclictest	0	-21	swapper/1	20:05:15	1
11302	99	33	12,8	cyclictest	23759	-21	cat	21:00:31	1
11302	99	33	12,7	cyclictest	27856	-21	cut	20:00:21	1
11302	99	33	11,9	cyclictest	22877	-21	ssh	00:21:32	1
11302	99	33	11,8	cyclictest	1857	-21	memory	22:40:22	1
11293	99	33	6,13	cyclictest	13	1	rcu_preempt	22:05:15	0
11311	99	32	9,9	cyclictest	27	-21	ksoftirqd/2	23:16:26	2
11311	99	32	7,8	cyclictest	27	-21	ksoftirqd/2	23:50:04	2
11311	99	32	10,5	cyclictest	27	-21	ksoftirqd/2	00:04:00	2
11302	99	32	9,10	cyclictest	30650	-21	grep	19:30:13	1
11293	99	32	8,19	cyclictest	12	-21	ksoftirqd/0	23:50:12	0
11322	99	31	17,9	cyclictest	359	66	irq/58-eth0	23:30:14	3
11302	99	31	19,9	cyclictest	29132	-21	sshd	21:07:19	1
11302	99	31	15,11	cyclictest	0	-21	swapper/1	20:20:11	1
11302	99	31	11,9	cyclictest	31438	-21	ssh	23:33:39	1
11322	99	30	4,16	cyclictest	359	66	irq/58-eth0	22:45:10	3
11311	99	30	4,10	cyclictest	27	-21	ksoftirqd/2	23:04:39	2
11311	99	30	3,17	cyclictest	273	46	irq/40-dwc2_hso	20:50:11	2
11311	99	30	2,21	cyclictest	0	-21	swapper/2	23:10:13	2
11311	99	30	2,20	cyclictest	273	46	irq/40-dwc2_hso	20:40:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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