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 Sun Jul 19, 2026 12:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
19420	99	49	0,40	cyclictest	310	-21	ssh	10:55:14	1
19429	99	45	30,9	cyclictest	11303	-21	ssh	10:25:16	2
19429	99	45	2,8	cyclictest	17553	-21	ssh	09:50:31	2
19420	99	45	1,2	cyclictest	25578	-21	apt-get	07:50:13	1
19420	99	45	1,2	cyclictest	20797	-21	apt-get	07:45:14	1
19420	99	44	3,33	cyclictest	2002	-21	ssh	10:20:12	1
19420	99	44	1,28	cyclictest	9908	-21	ssh	12:30:15	1
19410	99	44	5,8	cyclictest	13	1	rcu_preempt	07:45:13	0
19444	99	43	2,23	cyclictest	359	66	irq/58-eth0	10:00:13	3
19444	99	43	2,23	cyclictest	359	66	irq/58-eth0	10:00:13	3
19420	99	43	3,34	cyclictest	9087	-21	ssh	09:30:12	1
19420	99	43	1,3	cyclictest	0	-21	swapper/1	08:30:13	1
19420	99	42	5,30	cyclictest	11593	-21	ssh	11:55:12	1
19429	99	41	2,34	cyclictest	0	-21	swapper/2	09:48:31	2
19429	99	41	2,21	cyclictest	24746	-21	usage_EthcTask	10:30:31	2
19429	99	41	2,19	cyclictest	21686	-21	/usr/sbin/munin	09:55:15	2
19420	99	41	3,30	cyclictest	0	-21	swapper/1	10:25:31	1
19420	99	41	2,2	cyclictest	6421	-21	apt-get	07:30:14	1
19420	99	41	1,3	cyclictest	0	-21	swapper/1	08:40:13	1
19410	99	41	2,35	cyclictest	23425	-21	ssh	09:20:13	0
19410	99	41	1,34	cyclictest	6218	-21	rm	12:10:12	0
19420	99	40	2,2	cyclictest	0	-21	swapper/1	07:55:13	1
19420	99	40	1,6	cyclictest	0	-21	swapper/1	07:10:14	1
19420	99	40	1,3	cyclictest	16985	-21	apt-get	11:40:13	1
19420	99	40	1,3	cyclictest	0	-21	swapper/1	11:20:13	1
19420	99	40	1,13	cyclictest	21834	-21	apt-get	11:25:03	1
19444	99	39	29,3	cyclictest	359	66	irq/58-eth0	09:15:14	3
19429	99	39	2,10	cyclictest	5086	-21	kthreadcore	11:15:19	2
19429	99	39	1,9	cyclictest	1771	-21	kthreadcore	10:00:22	2
19429	99	39	1,9	cyclictest	1771	-21	kthreadcore	10:00:22	2
19420	99	39	2,24	cyclictest	15215	-21	ssh	12:15:13	1
19420	99	39	1,2	cyclictest	0	-21	swapper/1	11:15:12	1
19420	99	39	0,3	cyclictest	0	-21	swapper/1	07:25:12	1
19410	99	39	3,31	cyclictest	17011	-21	ssh	11:40:14	0
19410	99	39	2,27	cyclictest	11077	-21	ssh	10:25:12	0
19444	99	38	31,3	cyclictest	359	66	irq/58-eth0	09:45:13	3
19429	99	38	1,9	cyclictest	18460	-21	latency_hist	12:35:01	2
19429	99	38	1,10	cyclictest	8546	-21	cut	10:05:18	2
19429	99	38	0,21	cyclictest	14792	-21	ssh	10:45:14	2
19420	99	38	1,6	cyclictest	0	-21	swapper/1	08:00:13	1
19420	99	38	1,4	cyclictest	27983	-21	apt-get	09:00:12	1
19420	99	38	1,3	cyclictest	0	-21	swapper/1	09:25:14	1
19420	99	38	1,31	cyclictest	0	-21	swapper/1	10:00:13	1
19420	99	38	1,31	cyclictest	0	-21	swapper/1	10:00:12	1
19444	99	37	8,11	cyclictest	0	-21	swapper/3	10:23:31	3
19429	99	37	1,6	cyclictest	15468	-21	grep	12:15:18	2
19429	99	37	0,9	cyclictest	25540	-21	grep	11:25:23	2
19420	99	37	2,3	cyclictest	2587	-21	apt-get	11:50:14	1
19420	99	37	2,2	cyclictest	24236	-21	apt-get	12:20:12	1
19420	99	37	1,3	cyclictest	0	-21	swapper/1	08:35:12	1
19420	99	37	1,3	cyclictest	0	-21	swapper/1	07:20:14	1
19420	99	37	0,5	cyclictest	6199	-21	apt-get	12:10:13	1
19429	99	36	2,17	cyclictest	10244	-21	ssh	10:24:30	2
19429	99	36	1,9	cyclictest	334	-21	sendmail_mailqu	07:20:27	2
19429	99	36	1,9	cyclictest	30941	-21	irqrtprio	07:55:19	2
19420	99	36	1,3	cyclictest	0	-21	swapper/1	12:25:15	1
19420	99	36	1,3	cyclictest	0	-21	swapper/1	11:10:11	1
19420	99	36	1,12	cyclictest	20141	-21	ssh	10:30:14	1
19410	99	36	15,15	cyclictest	12	-21	ksoftirqd/0	07:30:15	0
19429	99	35	1,8	cyclictest	24647	-21	unixbench_singl	07:45:29	2
19429	99	35	1,8	cyclictest	20340	-21	latency_hist	12:00:01	2
19429	99	35	1,7	cyclictest	7384	-21	latency_hist	08:05:01	2
19429	99	35	1,13	cyclictest	6306	-21	latency_hist	07:30:01	2
19429	99	35	1,13	cyclictest	5814	-21	cron	12:10:00	2
19420	99	35	3,5	cyclictest	0	-21	swapper/1	08:10:12	1
19420	99	35	1,3	cyclictest	0	-21	swapper/1	12:35:13	1
19420	99	35	1,3	cyclictest	0	-21	swapper/1	08:05:15	1
19420	99	35	1,3	cyclictest	0	-21	swapper/1	07:35:14	1
19420	99	35	1,2	cyclictest	16382	-21	apt-get	10:10:13	1
19420	99	35	0,3	cyclictest	25391	-21	apt-get	10:15:12	1
19444	99	34	1,22	cyclictest	359	66	irq/58-eth0	12:15:13	3
19429	99	34	1,9	cyclictest	16362	-21	acpi	10:10:11	2
19429	99	34	1,14	cyclictest	21936	-21	/usr/sbin/munin	08:20:28	2
19429	99	34	1,14	cyclictest	16669	-21	grep	11:20:24	2
19429	99	34	1,13	cyclictest	11183	-21	latency_hist	07:35:02	2
19429	99	34	1,10	cyclictest	20011	-21	tr	11:40:21	2
19429	99	34	10,9	cyclictest	0	-21	swapper/2	08:40:24	2
19420	99	34	2,2	cyclictest	26765	-21	apt-get	08:25:13	1
19420	99	34	1,30	cyclictest	22072	-21	timerandwakeup	08:50:26	1
19429	99	33	1,9	cyclictest	1818	-21	kthreadcore	08:30:22	2
19429	99	33	1,9	cyclictest	11998	-21	cut	09:30:22	2
19429	99	33	13,4	cyclictest	0	-21	swapper/2	11:15:01	2
19429	99	33	1,14	cyclictest	27146	-21	grep	09:20:27	2
19420	99	33	1,8	cyclictest	28238	-21	/usr/sbin/munin	07:15:29	1
19420	99	33	1,7	cyclictest	20588	-21	/usr/sbin/munin	12:00:27	1
19420	99	33	1,27	cyclictest	14899	-21	diskstats	10:45:16	1
19420	99	33	1,11	cyclictest	26985	-21	netstat	09:20:24	1
19420	99	33	1,10	cyclictest	16007	-21	munin-run	10:10:01	1
19420	99	33	0,6	cyclictest	13367	-21	find	11:00:28	1
19420	99	33	0,3	cyclictest	26035	-21	apt-get	11:45:15	1
19410	99	33	11,9	cyclictest	13	1	rcu_preempt	12:25:14	0
19444	99	32	3,14	cyclictest	0	-21	swapper/3	09:55:31	3
19429	99	32	7,7	cyclictest	27	-21	ksoftirqd/2	09:40:01	2
19429	99	32	1,10	cyclictest	30360	-21	usage_Anybus	11:45:31	2
19429	99	32	0,9	cyclictest	31499	-21	uname	09:00:28	2
19420	99	32	1,9	cyclictest	9160	-21	grep	11:35:18	1
19420	99	32	1,9	cyclictest	29786	-21	fschecks_count	12:05:16	1
19420	99	32	1,8	cyclictest	24680	-21	cut	08:55:23	1
19420	99	32	1,7	cyclictest	7421	-21	tr	09:10:20	1
19420	99	32	1,7	cyclictest	15986	-21	sort	07:40:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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