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 Aug 03, 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
29817	99	60	1,8	cyclictest	31871	-21	ssh	22:30:14	2
29817	99	59	2,6	cyclictest	0	-21	swapper/2	00:05:16	2
29825	99	58	48,5	cyclictest	359	66	irq/58-eth0	22:35:14	3
29825	99	58	48,5	cyclictest	359	66	irq/58-eth0	22:35:13	3
29817	99	58	1,31	cyclictest	0	-21	swapper/2	00:35:15	2
29809	99	57	5,44	cyclictest	13593	-21	ssh	22:20:12	1
29817	99	54	1,5	cyclictest	0	-21	swapper/2	20:30:14	2
29817	99	52	1,36	cyclictest	29499	-21	ssh	23:40:13	2
29817	99	50	1,7	cyclictest	27802	-21	ssh	22:10:13	2
29817	99	48	3,10	cyclictest	0	-21	swapper/2	23:30:12	2
29817	99	48	24,16	cyclictest	0	-21	swapper/2	23:00:14	2
29809	99	48	9,28	cyclictest	844	-21	munin-node	23:35:13	1
29809	99	48	1,40	cyclictest	16361	-21	ssh	23:15:14	1
29809	99	47	3,6	cyclictest	13	1	rcu_preempt	19:30:14	1
29809	99	47	21,17	cyclictest	0	-21	swapper/1	23:30:13	1
29801	99	47	4,5	cyclictest	13	1	rcu_preempt	23:10:13	0
29817	99	44	2,7	cyclictest	22545	-21	ssh	00:30:13	2
29817	99	43	2,7	cyclictest	13512	-21	ssh	00:25:12	2
29809	99	42	2,32	cyclictest	15462	-21	diskmemload	21:10:13	1
29801	99	42	4,31	cyclictest	21503	-21	ssh	23:00:13	0
29817	99	41	1,13	cyclictest	2439	-21	cut	00:00:21	2
29801	99	41	3,6	cyclictest	13	1	rcu_preempt	23:40:12	0
29817	99	40	1,9	cyclictest	21118	-21	kthreadcore	00:10:21	2
29817	99	40	1,9	cyclictest	21118	-21	kthreadcore	00:10:21	2
29801	99	40	3,32	cyclictest	27903	-21	ssh	00:15:15	0
29817	99	39	1,5	cyclictest	20343	-21	ssh	23:35:13	2
29801	99	39	1,34	cyclictest	13519	-21	sshd	00:25:13	0
29817	99	38	2,9	cyclictest	0	-21	swapper/2	19:55:15	2
29817	99	38	0,8	cyclictest	23775	-21	ssh	21:30:30	2
29809	99	38	1,28	cyclictest	4477	-21	ssh	00:20:11	1
29817	99	37	5,5	cyclictest	26181	-21	cut	23:20:19	2
29817	99	37	2,27	cyclictest	4465	-21	apt-get	00:20:13	2
29817	99	37	1,9	cyclictest	8978	-21	kthreadcore	23:10:21	2
29817	99	37	1,8	cyclictest	31819	-21	kthreadcore	19:10:21	2
29801	99	37	2,22	cyclictest	12	-21	ksoftirqd/0	23:15:13	0
29801	99	37	1,33	cyclictest	0	-21	swapper/0	19:15:13	0
29825	99	36	23,9	cyclictest	359	66	irq/58-eth0	22:55:15	3
29825	99	36	19,9	cyclictest	359	66	irq/58-eth0	23:45:14	3
29817	99	36	1,9	cyclictest	25171	-21	ssh	21:50:20	2
29817	99	36	1,9	cyclictest	25171	-21	ssh	21:50:20	2
29817	99	36	1,9	cyclictest	24168	-21	ssh	23:55:13	2
29817	99	36	1,8	cyclictest	24926	-21	/usr/sbin/munin	21:15:16	2
29817	99	36	1,8	cyclictest	24577	-21	kthreadcore	22:25:22	2
29817	99	36	1,7	cyclictest	23138	-21	unixbench_multi	20:40:28	2
29817	99	36	1,13	cyclictest	25365	-21	grep	19:35:26	2
29817	99	36	1,12	cyclictest	4613	-21	kthreadcore	22:50:20	2
29817	99	36	1,12	cyclictest	11602	-21	kthreadcore	21:05:20	2
29817	99	36	1,10	cyclictest	14418	-21	cut	22:55:23	2
29817	99	36	0,9	cyclictest	31481	-21	kthreadcore	23:05:19	2
29817	99	36	0,9	cyclictest	18424	-21	cat	22:20:32	2
29817	99	36	0,10	cyclictest	26770	-21	/usr/sbin/munin	22:45:15	2
29817	99	35	3,8	cyclictest	17848	-21	tr	23:50:23	2
29817	99	35	1,13	cyclictest	10699	-21	ps	19:20:26	2
29817	99	35	1,10	cyclictest	1301	-21	apt-get	20:55:15	2
29809	99	35	6,19	cyclictest	24169	-21	ssh	23:55:13	1
29809	99	35	2,3	cyclictest	13	1	rcu_preempt	23:05:13	1
29801	99	35	6,26	cyclictest	6109	-21	ssh	23:45:14	0
29801	99	35	3,18	cyclictest	12	-21	ksoftirqd/0	20:35:14	0
29801	99	35	3,18	cyclictest	12	-21	ksoftirqd/0	20:35:14	0
29801	99	35	22,10	cyclictest	12	-21	ksoftirqd/0	21:40:13	0
29825	99	34	4,24	cyclictest	359	66	irq/58-eth0	23:55:12	3
29825	99	34	17,13	cyclictest	359	66	irq/58-eth0	22:00:13	3
29817	99	34	5,3	cyclictest	0	-21	swapper/2	20:05:02	2
29817	99	34	2,9	cyclictest	11280	-21	kthreadcore	22:00:21	2
29817	99	34	2,7	cyclictest	0	-21	swapper/2	20:15:12	2
29817	99	34	1,8	cyclictest	2497	-21	fschecks_count	19:15:15	2
29817	99	34	1,8	cyclictest	19797	-21	kthreadcore	22:40:20	2
29817	99	34	1,8	cyclictest	19040	-21	kthreadcore	19:30:22	2
29817	99	34	1,8	cyclictest	18962	-21	fschecks_time	22:05:17	2
29817	99	34	1,12	cyclictest	4054	-21	ps	19:50:18	2
29817	99	34	1,10	cyclictest	4458	-21	ssh	22:15:11	2
29817	99	34	1,10	cyclictest	14444	-21	ntpq	21:25:29	2
29817	99	34	0,9	cyclictest	310	-21	ssh	21:55:03	2
29817	99	34	0,9	cyclictest	28908	-21	/usr/sbin/munin	21:35:13	2
29817	99	34	0,8	cyclictest	29346	-21	cut	19:40:20	2
29817	99	34	0,10	cyclictest	17095	-21	cut	21:10:20	2
29801	99	34	2,22	cyclictest	12	-21	ksoftirqd/0	19:55:15	0
29817	99	33	2,10	cyclictest	21631	-21	proc_pri	20:05:27	2
29817	99	33	1,9	cyclictest	9998	-21	unixbench_singl	21:00:29	2
29817	99	33	1,9	cyclictest	9998	-21	unixbench_singl	21:00:29	2
29817	99	33	1,9	cyclictest	0	-21	swapper/2	20:45:15	2
29817	99	33	1,9	cyclictest	0	-21	swapper/2	19:25:28	2
29817	99	33	1,8	cyclictest	6609	-21	cat	23:25:31	2
29817	99	33	1,8	cyclictest	3228	-21	kthreadcore	21:20:20	2
29817	99	33	1,8	cyclictest	32072	-21	usage_Anybus	00:15:31	2
29817	99	33	1,13	cyclictest	943	-21	kthreadcore	19:45:21	2
29817	99	33	1,13	cyclictest	15568	-21	cut	21:45:20	2
29817	99	33	1,10	cyclictest	10080	-21	grep	23:45:29	2
29801	99	33	4,20	cyclictest	30672	-21	ssh	23:05:13	0
29801	99	33	2,24	cyclictest	12357	-21	ssh	22:55:14	0
29825	99	32	9,15	cyclictest	359	66	irq/58-eth0	21:30:15	3
29817	99	32	1,9	cyclictest	8468	-21	/usr/sbin/munin	22:35:32	2
29817	99	32	1,9	cyclictest	8468	-21	/usr/sbin/munin	22:35:31	2
29817	99	32	1,12	cyclictest	135	-21	systemd-journal	23:16:32	2
29809	99	32	5,20	cyclictest	14767	-21	ssh	21:45:14	1
29801	99	32	3,20	cyclictest	822	-21	ssh	00:00:13	0
29825	99	31	3,18	cyclictest	359	66	irq/58-eth0	23:10:13	3
29817	99	31	0,6	cyclictest	5672	-21	grep	21:40:14	2
29809	99	31	3,19	cyclictest	1677	-21	sh	21:20:13	1
29809	99	31	15,10	cyclictest	21	-21	ksoftirqd/1	23:50:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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