OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot3s.osadl.org (updated Fri Apr 17, 2026 00:45:28)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
232080	99	124	105,10	cyclictest	169	50	irq/224-8000000	22:30:01	0
232080	99	79	10,46	cyclictest	12	-21	ksoftirqd/0	23:05:04	0
232092	99	76	1,52	cyclictest	0	-21	swapper/3	21:50:02	3
232092	99	74	29,17	cyclictest	233818	-21	sshd	19:41:54	3
232085	99	72	5,48	cyclictest	311734	-21	ssh	00:05:03	1
232092	99	68	26,39	cyclictest	251721	-1	kworker/u9:2	21:50:01	3
232092	99	67	17,14	cyclictest	312749	-21	ssh	00:07:45	3
232092	99	65	17,13	cyclictest	322980	-21	ssh	00:32:00	3
232080	99	65	16,8	cyclictest	291692	-21	ssh	23:17:33	0
232080	99	64	21,39	cyclictest	253003	-21	sed	21:45:03	0
232092	99	63	15,16	cyclictest	286518	-21	cut	23:05:02	3
232092	99	63	14,14	cyclictest	273685	-21	ssh	22:34:44	3
232092	99	63	14,14	cyclictest	273685	-21	ssh	22:34:44	3
232080	99	63	36,10	cyclictest	308144	-21	ssh	23:56:38	0
232080	99	63	36,10	cyclictest	308144	-21	ssh	23:56:37	0
232080	99	61	19,7	cyclictest	12	-21	ksoftirqd/0	22:38:09	0
232092	99	60	9,20	cyclictest	299322	-21	ssh	23:35:27	3
232092	99	60	20,11	cyclictest	0	-21	swapper/3	22:00:56	3
232085	99	59	2,8	cyclictest	23	-21	ksoftirqd/1	00:20:00	1
232080	99	59	22,6	cyclictest	168	50	irq/134-8000000	00:10:02	0
232080	99	59	17,9	cyclictest	12	-21	ksoftirqd/0	21:35:58	0
232092	99	58	43,12	cyclictest	279595	-21	ssh	22:48:42	3
232092	99	58	39,15	cyclictest	234588	-21	sshd	19:59:22	3
232085	99	58	6,10	cyclictest	23	-21	ksoftirqd/1	00:30:05	1
232080	99	58	1,37	cyclictest	238257	-21	diskmemload	00:15:11	0
232080	99	58	12,9	cyclictest	12	-21	ksoftirqd/0	23:26:00	0
232092	99	57	16,8	cyclictest	287175	-21	ssh	23:06:29	3
232088	99	57	45,7	cyclictest	236731	-21	kworker/2:2	22:31:19	2
232088	99	57	45,7	cyclictest	236731	-21	kworker/2:2	22:31:18	2
232080	99	57	24,30	cyclictest	12	-21	ksoftirqd/0	21:23:49	0
232080	99	57	20,32	cyclictest	168	50	irq/134-8000000	00:38:26	0
232080	99	57	13,37	cyclictest	168	50	irq/134-8000000	23:35:00	0
232080	99	57	13,37	cyclictest	168	50	irq/134-8000000	23:35:00	0
232092	99	56	38,15	cyclictest	322066	-21	cat	00:30:01	3
232092	99	56	19,6	cyclictest	308168	-21	ssh	23:56:41	3
232092	99	56	19,6	cyclictest	308168	-21	ssh	23:56:40	3
232092	99	56	18,11	cyclictest	0	-21	swapper/3	22:39:40	3
232092	99	56	12,10	cyclictest	317961	-21	ssh	00:20:01	3
232088	99	56	48,5	cyclictest	236731	-21	kworker/2:2	23:09:28	2
232088	99	56	46,6	cyclictest	218395	-21	kworker/2:1	21:10:02	2
232080	99	56	8,9	cyclictest	12	-21	ksoftirqd/0	23:10:06	0
232080	99	56	12,39	cyclictest	12	-21	ksoftirqd/0	23:55:01	0
232092	99	55	41,10	cyclictest	303090	-21	ssh	23:44:53	3
232092	99	55	39,13	cyclictest	265640	-21	ssh	22:15:05	3
232092	99	55	36,15	cyclictest	310018	-21	ssh	00:00:54	3
232092	99	55	17,15	cyclictest	238257	-21	diskmemload	22:42:50	3
232092	99	55	16,12	cyclictest	0	-21	swapper/3	21:10:26	3
232092	99	55	12,13	cyclictest	262729	-21	ssh	22:08:30	3
232088	99	55	47,5	cyclictest	236731	-21	kworker/2:2	23:00:02	2
232088	99	55	46,5	cyclictest	236731	-21	kworker/2:2	23:34:15	2
232088	99	55	46,5	cyclictest	236731	-21	kworker/2:2	23:34:15	2
232085	99	55	40,11	cyclictest	3467602	-21	systemd-journal	23:55:01	1
232085	99	55	18,8	cyclictest	23	-21	ksoftirqd/1	22:51:38	1
232085	99	55	16,20	cyclictest	286540	-21	ssh	23:05:02	1
232085	99	55	13,9	cyclictest	23	-21	ksoftirqd/1	00:00:02	1
232085	99	55	13,9	cyclictest	23	-21	ksoftirqd/1	00:00:01	1
232080	99	55	9,8	cyclictest	12	-21	ksoftirqd/0	21:53:52	0
232080	99	55	9,7	cyclictest	12	-21	ksoftirqd/0	00:04:26	0
232080	99	55	15,22	cyclictest	12	-21	ksoftirqd/0	22:44:33	0
232080	99	55	11,9	cyclictest	12	-21	ksoftirqd/0	22:34:52	0
232080	99	55	11,9	cyclictest	12	-21	ksoftirqd/0	22:34:51	0
232092	99	54	39,12	cyclictest	295916	-21	ssh	23:27:30	3
232092	99	54	38,12	cyclictest	246652	-21	munin-run	21:30:01	3
232092	99	54	36,15	cyclictest	364	-21	snmpd	20:05:17	3
232092	99	54	36,15	cyclictest	364	-21	snmpd	20:05:17	3
232092	99	54	34,16	cyclictest	268604	-21	ssh	22:22:22	3
232092	99	54	34,16	cyclictest	268604	-21	ssh	22:22:22	3
232088	99	54	45,5	cyclictest	218395	-21	kworker/2:1	21:43:05	2
232088	99	54	44,7	cyclictest	218395	-21	kworker/2:1	21:14:54	2
232088	99	54	44,5	cyclictest	236731	-21	kworker/2:2	22:53:13	2
232085	99	54	13,8	cyclictest	23	-21	ksoftirqd/1	00:35:46	1
232085	99	54	10,7	cyclictest	23	-21	ksoftirqd/1	23:39:08	1
232080	99	54	19,6	cyclictest	168	50	irq/134-8000000	22:14:49	0
232080	99	54	19,6	cyclictest	168	50	irq/134-8000000	22:14:49	0
232080	99	54	15,8	cyclictest	12	-21	ksoftirqd/0	22:51:13	0
232080	99	54	14,9	cyclictest	12	-21	ksoftirqd/0	00:29:04	0
232080	99	54	1,30	cyclictest	0	-21	swapper/0	00:10:41	0
232080	99	54	11,9	cyclictest	12	-21	ksoftirqd/0	21:25:53	0
232092	99	53	40,10	cyclictest	3467602	-21	systemd-journal	22:51:51	3
232092	99	53	38,10	cyclictest	233066	-21	munin-run	19:30:02	3
232092	99	53	37,12	cyclictest	270013	-21	ssh	22:25:37	3
232092	99	53	37,12	cyclictest	249264	-21	ssh	21:35:54	3
232092	99	53	37,12	cyclictest	240979	-21	ssh	21:16:07	3
232092	99	53	37,12	cyclictest	240979	-21	ssh	21:16:06	3
232092	99	53	36,13	cyclictest	282564	-21	ssh	22:55:28	3
232092	99	53	36,13	cyclictest	264291	-21	ssh	22:12:07	3
232092	99	53	36,13	cyclictest	264291	-21	ssh	22:12:06	3
232092	99	53	34,16	cyclictest	243302	-21	ssh	21:21:44	3
232092	99	53	33,16	cyclictest	289330	-21	ssh	23:11:42	3
232092	99	53	33,16	cyclictest	251102	-21	ssh	21:40:08	3
232092	99	53	32,18	cyclictest	364	-21	snmpd	23:52:54	3
232092	99	53	32,16	cyclictest	291234	-21	ssh	23:16:15	3
232088	99	53	45,5	cyclictest	236731	-21	kworker/2:2	23:25:03	2
232088	99	53	45,5	cyclictest	218395	-21	kworker/2:1	22:38:40	2
232088	99	53	45,5	cyclictest	218395	-21	kworker/2:1	19:10:02	2
232088	99	53	44,6	cyclictest	218395	-21	kworker/2:1	20:55:02	2
232088	99	53	44,5	cyclictest	236731	-21	kworker/2:2	23:59:59	2
232088	99	53	44,5	cyclictest	236731	-21	kworker/2:2	00:00:00	2
232088	99	53	43,6	cyclictest	236731	-21	kworker/2:2	00:21:41	2
232088	99	53	43,6	cyclictest	236731	-21	kworker/2:2	00:21:41	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:33