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 Jun 23, 2026 12:45:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
15723	99	70	1,12	cyclictest	0	-21	swapper/2	07:40:12	2
15707	99	67	3,50	cyclictest	29946	-21	ssh	10:55:14	0
15707	99	62	1,55	cyclictest	10943	-21	apt-get	09:15:13	0
15707	99	59	19,32	cyclictest	536	-21	usb-storage	09:05:10	0
15723	99	56	21,17	cyclictest	27	-21	ksoftirqd/2	10:55:13	2
15707	99	54	6,6	cyclictest	13	1	rcu_preempt	07:40:13	0
15715	99	53	8,5	cyclictest	13	1	rcu_preempt	10:50:13	1
15707	99	52	4,33	cyclictest	31535	-21	ssh	11:50:11	0
15723	99	49	1,35	cyclictest	26042	-21	ssh	12:05:15	2
15707	99	49	2,42	cyclictest	22593	-21	apt-get	11:45:15	0
15723	99	48	1,37	cyclictest	8036	-21	ssh	10:25:15	2
15732	99	47	4,27	cyclictest	359	66	irq/58-eth0	11:20:11	3
15707	99	46	1,39	cyclictest	10124	-21	apt-get	08:45:13	0
15707	99	46	1,37	cyclictest	8097	-21	apt-get	11:55:11	0
15707	99	46	0,42	cyclictest	0	-21	swapper/0	12:10:13	0
15707	99	46	0,42	cyclictest	0	-21	swapper/0	12:10:12	0
15715	99	45	3,6	cyclictest	13	1	rcu_preempt	09:55:12	1
15715	99	45	2,32	cyclictest	20535	-21	ssh	12:20:16	1
15707	99	45	1,37	cyclictest	4564	-21	apt-get	11:35:13	0
15707	99	44	2,35	cyclictest	13153	-21	apt-get	10:10:12	0
15707	99	44	0,40	cyclictest	24500	-21	apt-get	09:00:10	0
15723	99	43	27,10	cyclictest	12863	-21	ssh	11:39:40	2
15715	99	43	2,29	cyclictest	31361	-21	ssh	10:20:13	1
15715	99	43	2,21	cyclictest	15025	-21	ssh	12:35:13	1
15707	99	43	1,38	cyclictest	17083	-21	apt-get	12:00:12	0
15707	99	42	2,35	cyclictest	9397	-21	apt-get	09:50:13	0
15707	99	42	2,35	cyclictest	9397	-21	apt-get	09:50:12	0
15732	99	41	7,18	cyclictest	359	66	irq/58-eth0	11:25:12	3
15732	99	41	3,23	cyclictest	359	66	irq/58-eth0	10:40:12	3
15732	99	41	3,23	cyclictest	359	66	irq/58-eth0	10:40:11	3
15707	99	41	2,21	cyclictest	0	-21	swapper/0	10:44:45	0
15707	99	41	2,21	cyclictest	0	-21	swapper/0	10:44:44	0
15707	99	41	1,26	cyclictest	10704	-21	kthreadcore	10:25:22	0
15707	99	41	0,28	cyclictest	325	-21	ssh	11:14:39	0
15707	99	41	0,28	cyclictest	325	-21	ssh	11:14:38	0
15707	99	41	0,27	cyclictest	1508	-21	diskmemload	11:34:23	0
15732	99	40	4,21	cyclictest	359	66	irq/58-eth0	09:20:12	3
15715	99	40	1,35	cyclictest	6464	-21	ssh	11:00:13	1
15707	99	40	3,32	cyclictest	340	-21	apt-get	09:45:13	0
15707	99	40	1,35	cyclictest	31628	-21	apt-get	08:00:13	0
15707	99	40	1,35	cyclictest	14998	-21	apt-get	12:35:12	0
15707	99	40	1,34	cyclictest	6452	-21	apt-get	11:00:12	0
15707	99	40	1,32	cyclictest	23218	-21	apt-get	08:25:13	0
15732	99	39	5,25	cyclictest	359	66	irq/58-eth0	10:35:12	3
15723	99	39	2,19	cyclictest	13775	-21	ssh	09:34:28	2
15715	99	39	1,34	cyclictest	29500	-21	rm	12:25:13	1
15707	99	39	1,34	cyclictest	23715	-21	apt-get	09:40:13	0
15707	99	39	1,33	cyclictest	4097	-21	apt-get	10:05:12	0
15707	99	39	1,28	cyclictest	29009	-21	ssh	10:17:42	0
15707	99	39	0,34	cyclictest	14907	-21	apt-get	08:50:12	0
15707	99	39	0,33	cyclictest	8794	-21	apt-get	08:10:13	0
15707	99	39	0,25	cyclictest	24177	-21	ssh	09:56:33	0
15707	99	39	0,24	cyclictest	27520	-21	ssh	12:23:07	0
15732	99	38	3,22	cyclictest	359	66	irq/58-eth0	11:30:11	3
15715	99	38	2,32	cyclictest	19076	-21	ssh	11:25:11	1
15707	99	38	2,31	cyclictest	0	-21	swapper/0	09:10:12	0
15707	99	38	1,33	cyclictest	0	-21	swapper/0	12:30:12	0
15707	99	38	1,24	cyclictest	13581	-21	/usr/sbin/munin	08:15:27	0
15707	99	38	1,22	cyclictest	0	-21	swapper/0	11:43:14	0
15707	99	38	0,32	cyclictest	26719	-21	apt-get	07:55:12	0
15707	99	38	0,31	cyclictest	20022	-21	apt-get	09:20:14	0
15707	99	38	0,24	cyclictest	8589	-21	sshd	11:18:39	0
15723	99	37	2,29	cyclictest	22965	-21	ssh	11:08:39	2
15723	99	37	2,18	cyclictest	8567	-21	ssh	09:49:29	2
15715	99	37	6,22	cyclictest	1508	-21	diskmemload	11:40:14	1
15707	99	37	1,32	cyclictest	11763	-21	ssh	10:45:14	0
15707	99	37	1,31	cyclictest	5242	-21	apt-get	08:40:12	0
15707	99	37	1,31	cyclictest	15384	-21	apt-get	11:05:10	0
15707	99	37	1,21	cyclictest	0	-21	swapper/0	10:36:25	0
15707	99	37	0,33	cyclictest	0	-21	swapper/0	08:05:12	0
15707	99	37	0,25	cyclictest	19968	-21	ssh	09:36:02	0
15723	99	36	3,25	cyclictest	0	-21	swapper/2	09:40:39	2
15715	99	36	18,15	cyclictest	21	-21	ksoftirqd/1	11:10:15	1
15715	99	36	18,15	cyclictest	21	-21	ksoftirqd/1	11:10:14	1
15707	99	36	0,33	cyclictest	20623	-21	apt-get	07:15:13	0
15707	99	36	0,32	cyclictest	29475	-21	apt-get	12:25:14	0
15707	99	36	0,32	cyclictest	10115	-21	apt-get	11:20:12	0
15707	99	36	0,23	cyclictest	10734	-21	ssh	09:30:51	0
15732	99	35	17,13	cyclictest	359	66	irq/58-eth0	12:10:13	3
15732	99	35	17,13	cyclictest	359	66	irq/58-eth0	12:10:13	3
15732	99	35	12,11	cyclictest	0	-21	swapper/3	09:50:13	3
15732	99	35	12,11	cyclictest	0	-21	swapper/3	09:50:12	3
15723	99	35	8,21	cyclictest	27	-21	ksoftirqd/2	10:02:39	2
15723	99	35	3,22	cyclictest	22269	-21	ssh	10:15:15	2
15723	99	35	2,19	cyclictest	273	46	irq/40-dwc2_hso	12:25:12	2
15715	99	35	9,5	cyclictest	13	1	rcu_preempt	10:30:13	1
15715	99	35	3,28	cyclictest	370	-21	ssh	09:45:13	1
15715	99	35	3,21	cyclictest	8124	-21	ssh	11:55:11	1
15732	99	34	3,20	cyclictest	359	66	irq/58-eth0	10:30:13	3
15732	99	34	2,20	cyclictest	359	66	irq/58-eth0	09:15:12	3
15732	99	34	2,19	cyclictest	359	66	irq/58-eth0	09:45:13	3
15723	99	34	1,26	cyclictest	15024	-21	ssh	12:35:14	2
15715	99	34	2,24	cyclictest	20049	-21	ssh	09:20:13	1
15715	99	34	2,24	cyclictest	10970	-21	ssh	09:15:14	1
15715	99	34	1,27	cyclictest	11527	-21	ssh	12:15:12	1
15707	99	34	1,28	cyclictest	28024	-21	apt-get	08:30:10	0
15707	99	34	0,3	cyclictest	17088	-21	ssh	10:30:14	0
15732	99	33	3,19	cyclictest	359	66	irq/58-eth0	08:05:12	3
15732	99	33	1,22	cyclictest	359	66	irq/58-eth0	12:20:15	3
15732	99	33	1,22	cyclictest	359	66	irq/58-eth0	12:00:13	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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