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 Mon Jul 20, 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
13292	99	61	4,49	cyclictest	12497	-21	ssh	12:15:14	0
13303	99	57	6,40	cyclictest	17751	-21	ssh	09:20:12	1
13303	99	57	6,40	cyclictest	17751	-21	ssh	09:20:11	1
13292	99	54	1,43	cyclictest	26968	-21	ssh	09:25:13	0
13292	99	54	1,43	cyclictest	26968	-21	ssh	09:25:13	0
13292	99	53	3,39	cyclictest	6829	-21	ssh	10:25:15	0
13292	99	51	2,40	cyclictest	18704	-21	ssh	11:25:13	0
13311	99	50	33,10	cyclictest	31408	-21	diskmemload	11:40:12	2
13292	99	49	5,36	cyclictest	31205	-21	ssh	09:45:15	0
13303	99	48	2,38	cyclictest	23962	-21	sh	11:10:14	1
13311	99	47	15,21	cyclictest	27	-21	ksoftirqd/2	11:00:12	2
13292	99	47	1,34	cyclictest	22084	-21	ssh	09:40:13	0
13303	99	46	1,40	cyclictest	0	-21	swapper/1	11:40:13	1
13303	99	45	1,5	cyclictest	0	-21	swapper/1	07:25:12	1
13303	99	44	1,38	cyclictest	0	-21	swapper/1	10:25:14	1
13292	99	44	6,26	cyclictest	516	-21	ssh	11:15:15	0
13323	99	43	3,22	cyclictest	359	66	irq/58-eth0	10:15:11	3
13303	99	43	3,35	cyclictest	0	-21	swapper/1	10:35:14	1
13303	99	43	3,35	cyclictest	0	-21	swapper/1	10:35:14	1
13303	99	43	1,3	cyclictest	0	-21	swapper/1	07:45:14	1
13323	99	42	2,26	cyclictest	359	66	irq/58-eth0	11:00:13	3
13303	99	42	3,32	cyclictest	8434	-21	sh	11:55:15	1
13323	99	41	4,19	cyclictest	359	66	irq/58-eth0	09:35:13	3
13303	99	41	1,4	cyclictest	23212	-21	apt-get	07:20:13	1
13292	99	41	22,7	cyclictest	12	-21	ksoftirqd/0	08:35:14	0
13303	99	40	1,3	cyclictest	0	-21	swapper/1	08:10:14	1
13303	99	40	1,33	cyclictest	0	-21	swapper/1	10:30:13	1
13303	99	40	0,6	cyclictest	19551	-21	apt-get	07:50:13	1
13292	99	40	2,31	cyclictest	15944	-21	ssh	10:30:12	0
13292	99	40	2,31	cyclictest	10874	-21	ssh	10:45:13	0
13303	99	39	0,3	cyclictest	0	-21	swapper/1	08:05:13	1
13303	99	38	4,27	cyclictest	14866	-21	ssh	11:05:12	1
13292	99	38	7,28	cyclictest	1779	-21	ssh	10:40:14	0
13292	99	38	4,20	cyclictest	12963	-21	ssh	09:35:14	0
13323	99	37	1,20	cyclictest	359	66	irq/58-eth0	08:20:13	3
13311	99	37	1,25	cyclictest	19961	-21	ssh	10:50:14	2
13303	99	37	2,27	cyclictest	5828	-21	ssh	11:00:13	1
13303	99	37	1,5	cyclictest	0	-21	swapper/1	09:05:13	1
13323	99	36	2,18	cyclictest	359	66	irq/58-eth0	09:30:11	3
13303	99	36	3,29	cyclictest	0	-21	swapper/1	12:35:12	1
13303	99	36	1,31	cyclictest	30711	-21	rm	12:25:13	1
13303	99	36	1,30	cyclictest	0	-21	swapper/1	07:55:13	1
13303	99	36	1,1	cyclictest	0	-21	swapper/1	07:35:11	1
13303	99	36	1,11	cyclictest	21713	-21	ntp_192.168.114	07:15:25	1
13303	99	36	1,10	cyclictest	2994	-21	forks	08:40:16	1
13303	99	36	0,1	cyclictest	0	-21	swapper/1	11:20:13	1
13292	99	36	3,20	cyclictest	26557	-1	kworker/u9:2	09:30:12	0
13303	99	35	2,29	cyclictest	21857	-21	kthreadcore	08:25:20	1
13303	99	35	1,30	cyclictest	524	-21	sh	11:15:16	1
13303	99	35	1,2	cyclictest	26184	-21	apt-get	10:00:14	1
13303	99	35	1,2	cyclictest	0	-21	swapper/1	08:00:13	1
13303	99	35	0,3	cyclictest	22084	-21	apt-get	09:00:13	1
13303	99	35	0,3	cyclictest	0	-21	swapper/1	08:15:14	1
13303	99	35	0,2	cyclictest	10883	-21	ssh	10:45:14	1
13303	99	35	0,10	cyclictest	12737	-21	perl	12:15:17	1
13323	99	34	4,19	cyclictest	359	66	irq/58-eth0	09:45:14	3
13323	99	34	2,24	cyclictest	359	66	irq/58-eth0	09:55:12	3
13323	99	34	20,8	cyclictest	359	66	irq/58-eth0	10:50:12	3
13303	99	34	4,27	cyclictest	1770	-21	ssh	10:40:14	1
13303	99	34	2,29	cyclictest	32077	-21	idleruntime	11:50:17	1
13303	99	34	1,8	cyclictest	31145	-21	irqstats	08:35:19	1
13303	99	34	1,30	cyclictest	4299	-21	latency_hist	11:35:02	1
13303	99	34	0,2	cyclictest	0	-21	swapper/1	12:05:13	1
13303	99	34	0,1	cyclictest	0	-21	swapper/1	09:50:12	1
13323	99	33	12,15	cyclictest	359	66	irq/58-eth0	10:00:14	3
13311	99	33	4,11	cyclictest	27	-21	ksoftirqd/2	09:05:12	2
13311	99	33	21,6	cyclictest	21568	-21	ssh	12:20:11	2
13303	99	33	5,25	cyclictest	18163	-21	cut	08:55:19	1
13303	99	33	1,8	cyclictest	654	-21	irqcore	07:30:18	1
13303	99	33	1,8	cyclictest	654	-21	irqcore	07:30:18	1
13303	99	33	1,8	cyclictest	13374	-21	ntp_192.168.114	07:40:24	1
13303	99	33	1,7	cyclictest	15355	-21	kthreadcore	07:10:20	1
13303	99	33	1,5	cyclictest	7793	-21	diskstats	08:45:17	1
13303	99	33	1,30	cyclictest	16059	-21	grep	10:10:29	1
13303	99	33	1,10	cyclictest	24806	-21	ssh	09:40:23	1
13303	99	33	1,10	cyclictest	1752	-21	ssh	10:55:49	1
13303	99	33	0,8	cyclictest	29021	-21	/usr/sbin/munin	08:30:23	1
13303	99	33	0,5	cyclictest	12936	-21	apt-get	09:35:13	1
13292	99	33	14,10	cyclictest	13287	-21	cyclictest	11:20:14	0
13292	99	33	13,12	cyclictest	29842	-21	diskmemload	10:00:25	0
13303	99	32	1,9	cyclictest	10245	-21	cut	09:15:22	1
13303	99	32	1,8	cyclictest	27647	-21	sed	09:25:19	1
13303	99	32	1,8	cyclictest	27647	-21	sed	09:25:18	1
13303	99	32	1,8	cyclictest	24697	-21	kthreadcore	11:45:22	1
13303	99	32	1,7	cyclictest	4482	-21	awk	11:35:12	1
13303	99	32	1,6	cyclictest	24039	-21	kthreadcore	10:15:20	1
13303	99	32	1,6	cyclictest	1855	-21	grep	10:20:30	1
13303	99	32	1,27	cyclictest	20832	-21	kthreadcore	12:00:23	1
13303	99	32	1,10	cyclictest	25511	-21	ssh	09:59:42	1
13303	99	32	1,10	cyclictest	18820	-21	entropy	11:25:15	1
13303	99	32	0,8	cyclictest	16209	-21	diskstats	08:20:16	1
13292	99	32	2,25	cyclictest	4485	-21	ssh	11:35:12	0
13323	99	31	6,18	cyclictest	359	66	irq/58-eth0	11:30:15	3
13323	99	31	4,13	cyclictest	359	66	irq/58-eth0	12:20:12	3
13323	99	31	15,12	cyclictest	359	66	irq/58-eth0	09:50:25	3
13311	99	31	5,16	cyclictest	31808	-21	ssh	11:50:14	2
13311	99	31	11,12	cyclictest	0	-21	swapper/2	08:45:14	2
13303	99	31	1,9	cyclictest	7051	-21	ssh	12:10:27	1
13303	99	31	1,7	cyclictest	12652	-21	/usr/sbin/munin	08:50:15	1
13303	99	31	1,6	cyclictest	32681	-21	kthreadcore	09:10:18	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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