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 Wed Mar 25, 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
5678	99	60	2,45	cyclictest	14028	-21	ssh	11:45:14	2
5662	99	60	10,10	cyclictest	13	1	rcu_preempt	11:10:11	0
5678	99	59	44,10	cyclictest	26557	-21	sh	10:05:13	2
5686	99	58	39,11	cyclictest	283	66	irq/58-eth0	10:55:13	3
5678	99	58	1,5	cyclictest	0	-21	swapper/2	08:05:14	2
5670	99	58	1,45	cyclictest	31718	-21	ssh	09:50:14	1
5678	99	57	1,42	cyclictest	924	-21	snmpd	12:05:12	2
5662	99	55	2,7	cyclictest	13	1	rcu_preempt	07:45:12	0
5670	99	53	3,40	cyclictest	27980	-21	ssh	09:30:13	1
5662	99	51	3,45	cyclictest	11396	-21	ssh	10:50:12	0
5678	99	50	1,44	cyclictest	0	-21	swapper/2	11:10:11	2
5678	99	50	1,3	cyclictest	0	-21	swapper/2	08:30:13	2
5678	99	50	1,38	cyclictest	924	-21	snmpd	11:00:12	2
5670	99	49	2,7	cyclictest	13	1	rcu_preempt	09:55:11	1
5670	99	49	2,7	cyclictest	13	1	rcu_preempt	09:55:11	1
5662	99	49	3,10	cyclictest	13	1	rcu_preempt	08:10:12	0
5678	99	48	1,2	cyclictest	27622	-21	apt-get	08:40:13	2
5662	99	48	4,38	cyclictest	10282	-21	ssh	11:25:11	0
5662	99	48	4,38	cyclictest	10282	-21	ssh	11:25:11	0
5678	99	47	1,3	cyclictest	0	-21	swapper/2	07:45:13	2
5678	99	46	2,34	cyclictest	0	-21	swapper/2	09:40:11	2
5678	99	46	1,3	cyclictest	0	-21	swapper/2	08:35:13	2
5678	99	46	1,29	cyclictest	27965	-21	ssh	09:30:12	2
5662	99	46	5,35	cyclictest	6477	-21	ssh	11:05:11	0
5678	99	45	2,2	cyclictest	223	46	irq/40-dwc2_hso	08:25:16	2
5678	99	45	2,2	cyclictest	223	46	irq/40-dwc2_hso	08:25:15	2
5678	99	45	1,3	cyclictest	20529	-21	ssh	10:55:11	2
5678	99	45	1,3	cyclictest	0	-21	swapper/2	10:30:09	2
5678	99	45	1,2	cyclictest	8366	-21	apt-get	09:55:11	2
5678	99	45	1,2	cyclictest	8366	-21	apt-get	09:55:11	2
5670	99	45	5,6	cyclictest	13	1	rcu_preempt	11:40:11	1
5662	99	45	2,33	cyclictest	31727	-21	ssh	09:50:14	0
5662	99	45	1,34	cyclictest	4616	-21	ssh	09:35:14	0
5678	99	44	1,6	cyclictest	0	-21	swapper/2	08:45:13	2
5678	99	44	0,39	cyclictest	12338	-21	apt-get	10:15:15	2
5678	99	44	0,2	cyclictest	4595	-21	ssh	09:35:12	2
5662	99	44	1,33	cyclictest	25579	-21	ssh	10:40:11	0
5678	99	43	1,7	cyclictest	0	-21	swapper/2	07:30:13	2
5678	99	43	1,37	cyclictest	0	-21	swapper/2	12:20:13	2
5678	99	43	1,37	cyclictest	0	-21	swapper/2	11:25:12	2
5678	99	43	1,37	cyclictest	0	-21	swapper/2	11:25:11	2
5670	99	43	1,28	cyclictest	2303	-21	ssh	10:45:12	1
5662	99	43	3,37	cyclictest	12461	-21	ssh	12:20:13	0
5678	99	42	2,2	cyclictest	28323	-21	apt-get	11:35:12	2
5670	99	42	3,35	cyclictest	828	-21	ssh	09:15:12	1
5670	99	42	27,7	cyclictest	531	-21	usb-storage	11:00:13	1
5678	99	41	1,2	cyclictest	15398	-21	apt-get	07:20:14	2
5678	99	40	2,32	cyclictest	223	46	irq/40-dwc2_hso	08:20:15	2
5678	99	40	0,4	cyclictest	20206	-21	apt-get	07:25:10	2
5678	99	40	0,3	cyclictest	0	-21	swapper/2	07:55:12	2
5670	99	40	14,19	cyclictest	21	-21	ksoftirqd/1	07:50:14	1
5662	99	40	5,25	cyclictest	16504	-21	ssh	10:35:13	0
5662	99	40	5,25	cyclictest	16504	-21	ssh	10:35:13	0
5662	99	40	32,4	cyclictest	20544	-21	ssh	10:55:13	0
5678	99	39	1,2	cyclictest	5784	-21	apt-get	07:10:12	2
5678	99	39	0,4	cyclictest	7259	-21	apt-get	12:35:14	2
5686	99	38	7,16	cyclictest	283	66	irq/58-eth0	11:20:12	3
5678	99	38	1,3	cyclictest	0	-21	swapper/2	10:50:13	2
5678	99	38	1,3	cyclictest	0	-21	swapper/2	09:00:14	2
5662	99	38	1,29	cyclictest	26558	-21	ssh	10:05:13	0
5662	99	38	1,26	cyclictest	24282	-21	rm	09:10:14	0
5686	99	37	2,20	cyclictest	283	66	irq/58-eth0	10:40:12	3
5678	99	37	2,3	cyclictest	0	-21	swapper/2	12:00:13	2
5678	99	37	1,8	cyclictest	0	-21	swapper/2	10:10:12	2
5678	99	37	1,4	cyclictest	816	-21	apt-get	09:15:13	2
5678	99	37	1,29	cyclictest	19254	-21	apt-get	09:05:12	2
5678	99	37	0,33	cyclictest	17422	-21	ssh	10:00:11	2
5670	99	37	3,29	cyclictest	21534	-21	ssh	10:20:13	1
5662	99	37	5,23	cyclictest	7304	-21	sh	10:30:10	0
5662	99	37	2,26	cyclictest	32048	-21	rm	11:55:13	0
5662	99	37	13,14	cyclictest	8378	-21	ssh	09:55:10	0
5662	99	37	13,14	cyclictest	8378	-21	ssh	09:55:10	0
5678	99	36	1,31	cyclictest	9951	-21	rm	11:40:38	2
5678	99	36	1,30	cyclictest	0	-21	swapper/2	08:10:12	2
5662	99	36	4,25	cyclictest	14008	-21	ssh	11:45:12	0
5662	99	36	1,27	cyclictest	8640	-21	ssh	12:00:11	0
5678	99	35	3,5	cyclictest	25259	-21	ssh	09:45:21	2
5678	99	35	1,7	cyclictest	1566	-21	ssh	10:44:36	2
5678	99	35	1,5	cyclictest	21531	-21	apt-get	10:20:14	2
5678	99	35	1,3	cyclictest	0	-21	swapper/2	07:40:12	2
5678	99	35	1,23	cyclictest	32567	-21	cut	11:55:18	2
5678	99	35	0,3	cyclictest	3289	-21	apt-get	12:15:13	2
5678	99	35	0,2	cyclictest	19268	-21	ssh	11:30:13	2
5670	99	35	5,26	cyclictest	7268	-21	ssh	12:35:11	1
5670	99	35	2,29	cyclictest	26681	-21	ssh	12:10:13	1
5678	99	34	3,28	cyclictest	223	46	irq/40-dwc2_hso	11:50:12	2
5678	99	34	1,7	cyclictest	4835	-21	/usr/sbin/munin	08:50:18	2
5678	99	34	1,6	cyclictest	1244	-21	grep	07:35:28	2
5678	99	34	0,2	cyclictest	21504	-21	apt-get	12:25:14	2
5662	99	34	17,14	cyclictest	0	-21	swapper/0	10:15:14	0
5678	99	33	6,24	cyclictest	12937	-21	cut	07:15:22	2
5678	99	33	3,27	cyclictest	223	46	irq/40-dwc2_hso	07:50:14	2
5678	99	33	1,9	cyclictest	24387	-21	df_inode	09:10:16	2
5678	99	33	1,7	cyclictest	2201	-21	timerwakeupswit	12:30:28	2
5678	99	33	1,6	cyclictest	1193	-21	/usr/sbin/munin	11:20:24	2
5678	99	33	1,5	cyclictest	13512	-21	unixbench_singl	08:55:27	2
5678	99	33	1,28	cyclictest	22178	-21	kthreadcore	08:00:18	2
5678	99	33	0,4	cyclictest	30666	-21	apt-get	10:25:12	2
5678	99	33	0,3	cyclictest	18894	-21	apt-get	09:25:12	2
5670	99	33	6,22	cyclictest	21	-21	ksoftirqd/1	12:15:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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