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 Sat Aug 22, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
21230	99	57	2,9	cyclictest	13	1	rcu_preempt	22:20:14	1
21230	99	56	18,31	cyclictest	0	-21	swapper/1	19:50:12	1
21230	99	50	39,4	cyclictest	5896	-21	apt-get	20:35:10	1
21230	99	50	39,4	cyclictest	5896	-21	apt-get	20:35:09	1
21253	99	49	31,11	cyclictest	359	66	irq/58-eth0	23:15:13	3
21241	99	48	28,11	cyclictest	20965	-21	apt-get	00:00:12	2
21253	99	46	5,25	cyclictest	359	66	irq/58-eth0	23:50:12	3
21253	99	46	34,9	cyclictest	359	66	irq/58-eth0	23:05:13	3
21253	99	46	3,28	cyclictest	359	66	irq/58-eth0	22:40:12	3
21230	99	46	2,33	cyclictest	5467	-21	ssh	21:45:12	1
21241	99	45	31,3	cyclictest	14455	-21	apt-get	21:50:12	2
21241	99	44	9,22	cyclictest	671	-21	ssh	00:25:02	2
21241	99	44	23,17	cyclictest	3102	-21	ssh	23:50:13	2
21230	99	44	4,28	cyclictest	26544	-21	ssh	23:45:12	1
21241	99	43	24,14	cyclictest	0	-21	swapper/2	20:10:10	2
21241	99	43	13,20	cyclictest	19576	-21	grep	00:15:27	2
21241	99	43	12,19	cyclictest	17738	-21	ssh	23:20:25	2
21230	99	43	35,4	cyclictest	30449	-21	apt-get	22:35:13	1
21230	99	43	13,21	cyclictest	21	-21	ksoftirqd/1	23:30:12	1
21219	99	43	4,34	cyclictest	1056	-21	ssh	00:25:12	0
21219	99	43	2,30	cyclictest	25249	-21	rm	21:20:14	0
21241	99	42	7,14	cyclictest	4510	-21	munin-run	20:00:02	2
21241	99	42	13,11	cyclictest	0	-21	swapper/2	22:30:27	2
21230	99	42	29,10	cyclictest	9052	-21	apt-get	22:05:13	1
21219	99	42	2,30	cyclictest	19022	-21	ssh	00:35:13	0
21219	99	42	14,23	cyclictest	12	-21	ksoftirqd/0	00:20:13	0
21219	99	42	1,32	cyclictest	28862	-21	ssh	21:40:12	0
21219	99	42	1,32	cyclictest	28862	-21	ssh	21:40:11	0
21241	99	41	30,7	cyclictest	10862	-21	apt-get	21:30:16	2
21241	99	41	28,9	cyclictest	17639	-21	apt-get	23:40:12	2
21241	99	41	10,15	cyclictest	9982	-21	ssh	22:22:15	2
21230	99	41	36,3	cyclictest	23950	-21	apt-get	20:20:13	1
21230	99	41	27,10	cyclictest	23122	-21	apt-get	23:25:13	1
21230	99	41	15,9	cyclictest	14082	-21	timerwakeupswit	00:30:28	1
21230	99	41	14,10	cyclictest	26783	-21	ssh	23:08:22	1
21230	99	41	14,10	cyclictest	23023	-21	ssh	21:17:50	1
21230	99	41	14,10	cyclictest	16792	-21	ssh	21:31:53	1
21230	99	41	13,8	cyclictest	17442	-21	users	22:25:31	1
21253	99	40	20,13	cyclictest	359	66	irq/58-eth0	23:25:11	3
21241	99	40	7,18	cyclictest	10551	-21	latency_hist	21:30:02	2
21241	99	40	20,13	cyclictest	0	-21	swapper/2	22:05:14	2
21241	99	40	17,20	cyclictest	0	-21	swapper/2	20:20:12	2
21230	99	40	8,15	cyclictest	22507	-21	latency	00:35:24	1
21230	99	40	33,4	cyclictest	2295	-21	apt-get	21:05:11	1
21230	99	40	33,4	cyclictest	2295	-21	apt-get	21:05:11	1
21230	99	40	32,5	cyclictest	15423	-21	apt-get	00:15:12	1
21230	99	40	28,7	cyclictest	24461	-21	apt-get	00:20:12	1
21230	99	40	15,8	cyclictest	9369	-21	ssh	21:28:45	1
21230	99	40	15,8	cyclictest	6913	-21	ssh	22:02:56	1
21230	99	40	15,11	cyclictest	10670	-21	ssh	23:16:21	1
21230	99	40	15,10	cyclictest	10973	-21	sh	23:54:14	1
21230	99	40	14,9	cyclictest	22781	-21	latency_hist	23:25:00	1
21230	99	40	14,10	cyclictest	30178	-21	ssh	21:20:39	1
21230	99	40	12,11	cyclictest	28768	-21	ssh	23:10:17	1
21230	99	40	11,11	cyclictest	30245	-21	grep	22:35:02	1
21241	99	39	9,19	cyclictest	0	-21	swapper/2	19:25:15	2
21241	99	39	9,14	cyclictest	32233	-21	latency_hist	22:00:03	2
21241	99	39	26,9	cyclictest	16210	-21	ssh	21:15:14	2
21241	99	39	1,22	cyclictest	8427	-21	ssh	22:57:57	2
21241	99	39	10,15	cyclictest	32042	-21	kthreadcore	21:40:22	2
21241	99	39	10,15	cyclictest	32042	-21	kthreadcore	21:40:21	2
21230	99	39	29,5	cyclictest	28867	-21	ssh	21:40:12	1
21230	99	39	29,5	cyclictest	28867	-21	ssh	21:40:11	1
21230	99	39	27,9	cyclictest	28733	-21	apt-get	20:25:12	1
21230	99	39	24,11	cyclictest	18063	-21	apt-get	22:10:14	1
21230	99	39	14,8	cyclictest	7147	-21	fschecks_count	22:40:14	1
21230	99	39	14,10	cyclictest	16114	-21	ssh	23:38:38	1
21253	99	38	3,26	cyclictest	359	66	irq/58-eth0	22:25:11	3
21241	99	38	9,7	cyclictest	27374	-21	ps	22:15:19	2
21241	99	38	31,4	cyclictest	5127	-21	apt-get	23:15:15	2
21241	99	38	12,11	cyclictest	302	-21	ssh	23:30:19	2
21241	99	38	12,11	cyclictest	28332	-21	wc	20:55:22	2
21230	99	38	19,15	cyclictest	0	-21	swapper/1	21:50:13	1
21230	99	38	15,10	cyclictest	6784	-21	ssh	22:55:57	1
21230	99	38	15,10	cyclictest	32586	-21	ssh	22:16:24	1
21230	99	38	14,8	cyclictest	6851	-21	diskmemload	22:49:03	1
21230	99	38	11,12	cyclictest	26393	-21	sed	19:45:26	1
21241	99	37	9,18	cyclictest	0	-21	swapper/2	23:04:07	2
21241	99	37	8,12	cyclictest	12187	-21	ssh	22:40:53	2
21241	99	37	7,8	cyclictest	17478	-21	ssh	23:56:13	2
21241	99	37	7,12	cyclictest	0	-21	swapper/2	23:05:16	2
21241	99	37	12,16	cyclictest	32150	-21	netstat	23:10:23	2
21241	99	37	11,12	cyclictest	930	-21	snmpd	00:35:11	2
21241	99	37	10,13	cyclictest	13917	-21	usage_EthcTask	20:05:31	2
21230	99	37	27,7	cyclictest	6505	-21	ssh	00:10:13	1
21230	99	37	26,7	cyclictest	29939	-21	apt-get	00:05:14	1
21230	99	37	19,14	cyclictest	0	-21	swapper/1	23:55:12	1
21230	99	37	13,11	cyclictest	7017	-21	ssh	00:26:50	1
21230	99	37	12,8	cyclictest	11682	-21	ntp_192.168.114	19:30:24	1
21230	99	37	11,10	cyclictest	15223	-21	usage_EthcTask	23:00:30	1
21219	99	37	7,17	cyclictest	12	-21	ksoftirqd/0	22:00:13	0
21241	99	36	4,16	cyclictest	10910	-21	grep	20:40:16	2
21241	99	36	12,8	cyclictest	24838	-21	ssh	21:35:45	2
21241	99	36	11,8	cyclictest	18199	-21	diskstats	22:10:15	2
21230	99	36	9,14	cyclictest	5783	-21	kthreadcore	20:00:19	1
21230	99	36	30,3	cyclictest	29906	-21	apt-get	21:00:12	1
21230	99	36	26,6	cyclictest	19769	-21	apt-get	21:35:14	1
21230	99	36	24,7	cyclictest	7246	-21	ssh	21:10:13	1
21230	99	36	17,15	cyclictest	0	-21	swapper/1	20:55:11	1
21230	99	36	12,9	cyclictest	31000	-21	ssh	22:51:57	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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