OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #c, slot #8

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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 rackcslot8.osadl.org (updated Sun Jul 12, 2026 12:49:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3273	91	320	0,311	ptp4l	0	-21	swapper/1	07:06:59	1
3273	91	320	0,311	ptp4l	0	-21	swapper/1	07:06:59	1
991	99	280	60,23	cyclictest	15	1	rcu_preempt	09:15:00	9
31849	2	244	237,6	sleep6	0	-21	swapper/6	07:06:33	28
31849	2	244	237,6	sleep6	0	-21	swapper/6	07:06:33	28
28945	2	192	183,7	sleep27	0	-21	swapper/27	07:05:18	20
28945	2	192	183,7	sleep27	0	-21	swapper/27	07:05:17	20
1010	99	175	7,164	cyclictest	15	1	rcu_preempt	10:46:39	11
1069	99	169	15,124	cyclictest	0	-21	swapper/27	10:00:18	20
3308	91	168	158,7	phc2sys	0	-21	swapper/2	07:05:23	12
3308	91	168	158,7	phc2sys	0	-21	swapper/2	07:05:22	12
991	99	166	59,105	cyclictest	0	-21	swapper/17	12:00:17	9
991	99	166	59,105	cyclictest	0	-21	swapper/17	12:00:17	9
921	99	155	63,90	cyclictest	0	-21	swapper/5	12:25:18	27
1016	99	154	47,56	cyclictest	0	-21	swapper/20	07:40:05	13
1039	99	153	48,63	cyclictest	0	-21	swapper/23	08:55:01	16
1010	99	144	0,89	cyclictest	0	-21	swapper/19	07:52:27	11
1039	99	141	0,79	cyclictest	0	-21	swapper/23	12:15:20	16
946	99	140	48,72	cyclictest	0	-21	swapper/10	09:35:57	2
1016	99	139	0,85	cyclictest	0	-21	swapper/20	09:10:46	13
1016	99	139	0,85	cyclictest	0	-21	swapper/20	08:00:18	13
1016	99	139	0,84	cyclictest	0	-21	swapper/20	09:30:01	13
946	99	138	32,105	cyclictest	0	-21	swapper/10	09:26:58	2
946	99	138	27,40	cyclictest	0	-21	swapper/10	07:10:20	2
946	99	136	31,76	cyclictest	0	-21	swapper/10	11:19:39	2
946	99	136	31,76	cyclictest	0	-21	swapper/10	11:19:39	2
946	99	136	28,107	cyclictest	0	-21	swapper/10	12:28:36	2
978	99	135	64,27	cyclictest	0	-21	swapper/15	12:15:19	7
978	99	134	51,55	cyclictest	0	-21	swapper/15	10:37:29	7
978	99	134	43,58	cyclictest	0	-21	swapper/15	08:50:05	7
946	99	134	27,74	cyclictest	0	-21	swapper/10	12:00:15	2
946	99	134	27,74	cyclictest	0	-21	swapper/10	12:00:15	2
921	99	134	68,21	cyclictest	0	-21	swapper/5	10:22:34	27
1069	99	134	15,118	cyclictest	0	-21	swapper/27	09:00:25	20
1016	99	134	18,77	cyclictest	0	-21	swapper/20	12:26:02	13
1010	99	134	2,78	cyclictest	0	-21	swapper/19	12:22:48	11
907	99	132	48,56	cyclictest	0	-21	swapper/2	12:31:21	12
978	99	131	27,73	cyclictest	0	-21	swapper/15	09:13:04	7
895	99	131	0,83	cyclictest	0	-21	swapper/0	09:50:01	0
1069	99	131	15,72	cyclictest	0	-21	swapper/27	11:52:00	20
1069	99	131	15,72	cyclictest	0	-21	swapper/27	11:51:59	20
1016	99	131	49,57	cyclictest	0	-21	swapper/20	10:54:13	13
1016	99	131	39,61	cyclictest	0	-21	swapper/20	12:10:27	13
978	99	130	30,64	cyclictest	0	-21	swapper/15	08:45:48	7
978	99	130	30,59	cyclictest	0	-21	swapper/15	10:40:42	7
907	99	130	42,54	cyclictest	0	-21	swapper/2	08:15:23	12
907	99	130	25,67	cyclictest	0	-21	swapper/2	07:26:12	12
1016	99	130	40,62	cyclictest	0	-21	swapper/20	10:42:51	13
1016	99	130	38,61	cyclictest	0	-21	swapper/20	08:44:12	13
1016	99	130	26,77	cyclictest	0	-21	swapper/20	11:41:40	13
1016	99	130	26,77	cyclictest	0	-21	swapper/20	11:41:39	13
1016	99	130	25,63	cyclictest	0	-21	swapper/20	10:29:56	13
1010	99	130	55,46	cyclictest	0	-21	swapper/19	07:20:22	11
1010	99	130	27,65	cyclictest	0	-21	swapper/19	08:03:39	11
978	99	129	51,67	cyclictest	0	-21	swapper/15	09:23:12	7
978	99	129	31,62	cyclictest	0	-21	swapper/15	10:58:20	7
978	99	129	28,66	cyclictest	0	-21	swapper/15	11:20:16	7
978	99	129	28,66	cyclictest	0	-21	swapper/15	11:20:15	7
978	99	129	28,65	cyclictest	0	-21	swapper/15	11:47:46	7
978	99	129	28,65	cyclictest	0	-21	swapper/15	11:47:45	7
978	99	129	26,70	cyclictest	0	-21	swapper/15	10:02:46	7
946	99	129	47,40	cyclictest	0	-21	swapper/10	09:50:25	2
907	99	129	45,53	cyclictest	0	-21	swapper/2	11:05:37	12
907	99	129	45,53	cyclictest	0	-21	swapper/2	11:05:36	12
907	99	129	33,62	cyclictest	0	-21	swapper/2	11:47:50	12
907	99	129	33,62	cyclictest	0	-21	swapper/2	11:47:50	12
895	99	129	25,45	cyclictest	0	-21	swapper/0	07:20:24	0
895	99	129	0,83	cyclictest	0	-21	swapper/0	10:05:02	0
1016	99	129	28,65	cyclictest	0	-21	swapper/20	10:23:43	13
978	99	128	57,66	cyclictest	0	-21	swapper/15	11:04:12	7
978	99	128	29,65	cyclictest	0	-21	swapper/15	08:29:16	7
978	99	128	28,68	cyclictest	0	-21	swapper/15	11:37:53	7
978	99	128	28,68	cyclictest	0	-21	swapper/15	11:37:53	7
978	99	128	28,68	cyclictest	0	-21	swapper/15	10:27:20	7
978	99	128	27,63	cyclictest	0	-21	swapper/15	09:05:02	7
907	99	128	47,54	cyclictest	0	-21	swapper/2	11:21:07	12
907	99	128	47,54	cyclictest	0	-21	swapper/2	11:21:06	12
1016	99	128	54,57	cyclictest	0	-21	swapper/20	12:05:02	13
1016	99	128	48,54	cyclictest	0	-21	swapper/20	07:30:20	13
1016	99	128	34,62	cyclictest	0	-21	swapper/20	09:41:50	13
1016	99	128	32,64	cyclictest	0	-21	swapper/20	12:18:58	13
1016	99	128	28,69	cyclictest	0	-21	swapper/20	10:57:48	13
1016	99	128	28,67	cyclictest	0	-21	swapper/20	08:20:03	13
1016	99	128	27,68	cyclictest	0	-21	swapper/20	11:56:43	13
1016	99	128	27,68	cyclictest	0	-21	swapper/20	11:56:43	13
1016	99	128	26,66	cyclictest	0	-21	swapper/20	09:54:43	13
1010	99	128	50,61	cyclictest	0	-21	swapper/19	11:10:25	11
1010	99	128	50,61	cyclictest	0	-21	swapper/19	11:10:25	11
1010	99	128	45,55	cyclictest	0	-21	swapper/19	10:37:03	11
978	99	127	28,72	cyclictest	0	-21	swapper/15	10:13:27	7
978	99	127	28,69	cyclictest	0	-21	swapper/15	12:30:16	7
978	99	127	28,64	cyclictest	0	-21	swapper/15	11:41:39	7
978	99	127	28,64	cyclictest	0	-21	swapper/15	11:41:38	7
978	99	127	27,64	cyclictest	0	-21	swapper/15	12:00:21	7
978	99	127	27,64	cyclictest	0	-21	swapper/15	12:00:20	7
978	99	127	25,61	cyclictest	0	-21	swapper/15	11:31:29	7
978	99	127	25,61	cyclictest	0	-21	swapper/15	11:31:29	7
907	99	127	49,56	cyclictest	0	-21	swapper/2	09:28:52	12
907	99	127	46,55	cyclictest	0	-21	swapper/2	10:21:47	12
907	99	127	38,59	cyclictest	0	-21	swapper/2	11:02:55	12
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This page was last modified on 2019-05-28 - 00:17