OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #5, slot #0

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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

Characteristics of the 100 highest latencies:

System rack5slot0.osadl.org (updated Fri Aug 14, 2026 00:44:48)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
22646	2	130	0,1	sleep0	22643	-21	sshd	22:08:24	0
20840	2	108	32,47	sleep1	0	-21	swapper/1	19:09:47	1
9132	2	105	0,0	sleep0	0	-21	swapper/0	21:24:28	0
22659	2	103	0,3	sleep0	21115	99	cyclictest	21:42:31	0
31341	2	100	0,2	sleep2	2512	-21	runrttasks	21:49:22	2
27463	2	94	0,2	sleep2	0	-21	swapper/2	00:03:05	2
16454	2	91	0,2	sleep3	0	-21	swapper/3	21:10:23	3
24302	2	90	0,2	sleep1	0	-21	swapper/1	21:42:40	1
19929	2	90	0,2	sleep1	19922	-21	sshd	21:25:20	1
28644	2	88	0,3	sleep2	0	-21	swapper/2	00:08:54	2
32414	2	87	0,4	sleep3	21118	99	cyclictest	22:55:32	3
14721	2	87	0,1	sleep3	0	-21	swapper/3	00:07:38	3
21182	2	84	0,2	sleep0	0	-21	swapper/0	23:24:31	0
17846	2	83	0,3	sleep0	21115	99	cyclictest	00:05:06	0
25404	2	82	0,2	sleep3	25403	-21	id	22:32:03	3
25404	2	82	0,2	sleep3	25403	-21	id	22:32:03	3
20674	2	82	32,46	sleep3	0	-21	swapper/3	19:07:40	3
17158	2	82	0,2	sleep2	0	-21	swapper/2	23:35:42	2
9794	2	81	0,0	sleep2	9784	-21	sshd	23:49:54	2
7876	2	81	0,2	sleep2	0	-21	swapper/2	23:20:23	2
7951	2	80	0,2	sleep1	7946	-21	sshd	22:04:20	1
2312	2	80	0,3	sleep2	2305	-21	sshd	23:28:30	2
22240	2	80	0,2	sleep3	0	-21	swapper/3	23:59:49	3
1977	2	80	0,2	sleep2	1975	-21	sshd	21:35:08	2
15628	2	80	0,4	sleep1	21116	99	cyclictest	23:12:14	1
11521	2	79	0,4	sleep0	0	-21	swapper/0	23:11:48	0
10198	2	79	0,2	sleep1	0	-21	swapper/1	22:36:22	1
3878	2	78	0,2	sleep2	2512	-21	runrttasks	20:55:01	2
26064	2	78	0,0	sleep0	26060	-21	sshd	22:52:12	0
18889	2	78	0,2	sleep1	18866	-21	sshd	22:51:34	1
18642	2	77	0,2	sleep2	18627	-21	sshd	00:13:55	2
31746	2	75	0,2	sleep1	0	-21	swapper/1	22:49:57	1
7218	2	73	0,2	sleep1	0	-21	swapper/1	23:34:54	1
8553	2	72	0,2	sleep1	0	-21	swapper/1	21:35:35	1
29463	2	69	0,2	sleep3	422	-21	jbd2/dm-0-8	22:26:18	3
16642	2	65	0,1	sleep1	16639	-21	sshd	23:41:22	1
5175	2	61	0,2	sleep1	0	-21	swapper/1	23:49:28	1
20851	2	58	32,9	sleep2	0	-21	swapper/2	19:09:56	2
20765	2	58	33,4	sleep0	0	-21	swapper/0	19:08:49	0
6632	2	34	0,32	sleep2	1446	50	irq/27-eth0	22:39:09	2
3953	2	33	0,0	sleep0	0	-21	swapper/0	21:15:02	0
2454	2	33	0,0	sleep2	0	-21	swapper/2	00:29:54	2
2454	2	33	0,0	sleep2	0	-21	swapper/2	00:29:54	2
21816	2	31	0,3	sleep1	0	-21	swapper/1	21:57:03	1
23293	2	30	0,4	sleep2	21117	99	cyclictest	23:30:17	2
8068	2	28	0,4	sleep3	21118	99	cyclictest	22:09:59	3
21118	99	27	0,25	cyclictest	22764	-21	bash	23:03:48	3
7879	2	26	0,23	sleep3	1446	50	irq/27-eth0	00:04:15	3
10462	2	26	0,3	sleep3	10459	-21	bash	21:53:16	3
21494	2	25	0,2	sleep2	21479	-21	sshd	21:42:25	2
21117	99	25	0,16	cyclictest	20240	-21	sshd	00:16:50	2
22977	2	24	2,20	sleep1	1446	50	irq/27-eth0	00:23:04	1
21116	99	24	0,6	cyclictest	22	-21	ksoftirqd/1	22:42:39	1
18980	2	24	0,2	sleep2	0	-21	swapper/2	22:40:16	2
10497	2	24	0,2	sleep2	0	-21	swapper/2	22:01:41	2
10486	2	24	0,2	sleep2	0	-21	swapper/2	22:30:42	2
10486	2	24	0,2	sleep2	0	-21	swapper/2	22:30:42	2
25672	2	23	0,1	sleep2	0	-21	swapper/2	21:20:12	2
22168	2	23	0,21	sleep3	1446	50	irq/27-eth0	21:36:49	3
21117	99	23	6,3	cyclictest	0	-21	swapper/2	23:56:42	2
14939	2	23	0,3	sleep3	14927	-21	sshd	21:24:59	3
12887	2	23	0,2	sleep2	12885	-21	sshd	00:30:42	2
11105	2	23	0,3	sleep3	0	-21	swapper/3	22:50:51	3
21116	99	22	7,1	cyclictest	22	-21	ksoftirqd/1	00:35:36	1
12520	2	22	0,1	sleep0	12517	-21	sshd	21:59:05	0
9167	2	21	0,9	sleep0	0	-21	swapper/0	23:52:52	0
3509	2	21	0,19	sleep3	1446	50	irq/27-eth0	00:24:14	3
30465	2	21	0,3	sleep0	0	-21	swapper/0	21:49:16	0
2737	2	21	0,1	sleep0	0	-21	swapper/0	22:24:03	0
21117	99	21	2,4	cyclictest	0	-21	swapper/2	00:36:38	2
21116	99	21	8,11	cyclictest	22	-21	ksoftirqd/1	21:33:55	1
21116	99	21	1,15	cyclictest	22	-21	ksoftirqd/1	23:37:24	1
20423	2	21	0,2	sleep3	20422	-21	bash	23:18:44	3
12724	2	21	0,19	sleep3	1446	50	irq/27-eth0	21:15:42	3
12640	2	21	0,19	sleep1	289	50	irq/26-ahci[000	22:24:57	1
8324	2	20	0,18	sleep3	1446	50	irq/27-eth0	23:23:23	3
21116	99	20	9,10	cyclictest	22	-21	ksoftirqd/1	23:24:28	1
21116	99	20	8,11	cyclictest	22	-21	ksoftirqd/1	23:56:44	1
21116	99	20	16,3	cyclictest	1711	-21	bash	00:09:22	1
21116	99	20	1,18	cyclictest	22	-21	ksoftirqd/1	23:04:03	1
2045	2	20	0,3	sleep0	0	-21	swapper/0	21:29:29	0
16631	2	20	0,0	sleep0	16629	-21	seq	23:47:35	0
7999	2	19	0,2	sleep1	0	-21	swapper/1	23:08:16	1
29283	2	19	0,17	sleep3	1446	50	irq/27-eth0	00:32:16	3
22351	2	19	0,2	sleep2	0	-21	swapper/2	21:25:30	2
21118	99	19	8,5	cyclictest	15829	-21	sshd	23:05:55	3
21118	99	19	10,7	cyclictest	28304	-21	id	23:33:45	3
21118	99	19	0,14	cyclictest	32649	-21	sshd	21:58:01	3
21117	99	19	2,4	cyclictest	0	-21	swapper/2	22:56:39	2
21116	99	19	8,3	cyclictest	22	-21	ksoftirqd/1	21:21:24	1
21116	99	19	6,3	cyclictest	0	-21	swapper/1	21:17:51	1
21116	99	19	1,5	cyclictest	22	-21	ksoftirqd/1	22:59:36	1
21116	99	19	1,17	cyclictest	22	-21	ksoftirqd/1	21:46:57	1
21116	99	19	10,2	cyclictest	22	-21	ksoftirqd/1	23:52:26	1
21116	99	19	0,3	cyclictest	20686	-21	bash	00:25:38	1
21116	99	19	0,3	cyclictest	20686	-21	bash	00:25:37	1
21116	99	19	0,14	cyclictest	0	-21	swapper/1	00:31:45	1
21116	99	19	0,12	cyclictest	22	-21	ksoftirqd/1	22:30:18	1
21116	99	19	0,12	cyclictest	22	-21	ksoftirqd/1	22:30:18	1
21116	99	19	0,10	cyclictest	22	-21	ksoftirqd/1	23:18:21	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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