OSADL QA Farm on Real-time of Mainline Linux

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

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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 rackeslot3.osadl.org (updated Fri Mar 13, 2026 00:43:49)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
983258	99	67	61,4	cyclictest	0	-21	swapper/1	20:08:55	1
983258	99	64	43,18	cyclictest	2641011	-1	kworker/1:2H	23:50:14	1
983258	99	63	59,2	cyclictest	0	-21	swapper/1	20:50:06	1
983258	99	63	43,18	cyclictest	1007231	-21	kworker/1:1	20:30:14	1
983258	99	63	41,21	cyclictest	2641011	-1	kworker/1:2H	20:45:01	1
983258	99	63	41,20	cyclictest	1116708	-21	kworker/1:0	23:10:15	1
983258	99	63	41,20	cyclictest	1116708	-21	kworker/1:0	23:10:15	1
983258	99	63	0,1	cyclictest	0	-21	swapper/1	19:51:54	1
983258	99	62	57,3	cyclictest	0	-21	swapper/1	22:20:24	1
983258	99	62	44,17	cyclictest	982101	-21	kworker/1:2	19:15:15	1
983258	99	62	43,18	cyclictest	1007836	-21	kworker/1:3	20:27:24	1
983258	99	62	41,19	cyclictest	2641011	-1	kworker/1:2H	23:45:13	1
983258	99	61	43,17	cyclictest	982101	-21	kworker/1:2	19:10:00	1
983258	99	61	41,18	cyclictest	1000759	-21	kworker/1:2	20:10:13	1
983258	99	61	35,24	cyclictest	991541	-21	kworker/1:3	19:40:14	1
983258	99	60	43,16	cyclictest	2641011	-1	kworker/1:2H	00:29:52	1
983258	99	59	42,16	cyclictest	1137695	-21	kworker/1:2	23:35:12	1
983258	99	59	42,16	cyclictest	1069250	-21	kworker/1:0	22:10:21	1
983258	99	59	41,17	cyclictest	1013340	-21	kworker/1:0	20:45:14	1
983258	99	59	40,18	cyclictest	2641011	-1	kworker/1:2H	19:50:00	1
983258	99	59	40,17	cyclictest	1164908	-21	kworker/1:1	00:00:02	1
983258	99	59	38,19	cyclictest	2641011	-1	kworker/1:2H	23:05:00	1
983258	99	59	36,21	cyclictest	988425	-21	kworker/1:0	19:30:15	1
983253	99	59	56,2	cyclictest	1129127	-21	kworker/0:2	23:43:53	0
983258	99	58	54,2	cyclictest	0	-21	swapper/1	00:06:58	1
983258	99	58	42,15	cyclictest	2641011	-1	kworker/1:2H	21:00:14	1
983258	99	58	42,15	cyclictest	2641011	-1	kworker/1:2H	19:58:56	1
983258	99	58	42,15	cyclictest	1194507	-21	kworker/1:3	00:35:17	1
983258	99	58	42,15	cyclictest	1164908	-21	kworker/1:1	00:00:13	1
983258	99	58	42,15	cyclictest	1128817	-21	kworker/1:2	23:20:17	1
983258	99	58	42,15	cyclictest	1064763	-21	kworker/1:2	22:06:57	1
983258	99	58	42,15	cyclictest	1034820	-21	kworker/1:3	21:30:01	1
983258	99	58	39,18	cyclictest	1140453	-21	kworker/1:3	23:30:21	1
983258	99	57	42,14	cyclictest	2641011	-1	kworker/1:2H	22:02:52	1
983258	99	57	42,14	cyclictest	1107033	-21	kworker/1:0	22:51:58	1
983258	99	57	41,15	cyclictest	2641011	-1	kworker/1:2H	21:15:06	1
983258	99	57	41,15	cyclictest	1116708	-21	kworker/1:0	23:15:14	1
983258	99	57	40,16	cyclictest	1007231	-21	kworker/1:1	21:05:17	1
983258	99	57	39,17	cyclictest	1179244	-21	kworker/1:0	00:20:00	1
983258	99	57	39,17	cyclictest	1173981	-21	kworker/1:2	00:10:14	1
983258	99	57	39,16	cyclictest	1116708	-21	kworker/1:0	23:25:32	1
983258	99	57	39,16	cyclictest	1091801	-21	kworker/1:1	22:35:13	1
983258	99	57	1,53	cyclictest	1122934	-21	cron	23:09:59	1
983258	99	56	41,14	cyclictest	2641011	-1	kworker/1:2H	21:25:06	1
983258	99	56	41,14	cyclictest	1188115	-21	kworker/1:2	00:30:06	1
983258	99	56	41,14	cyclictest	1188115	-21	kworker/1:2	00:30:06	1
983258	99	56	41,14	cyclictest	1044217	-21	kworker/1:1	21:50:00	1
983258	99	56	41,14	cyclictest	1034820	-21	kworker/1:3	21:54:27	1
983258	99	56	41,14	cyclictest	1007231	-21	kworker/1:1	20:55:14	1
983258	99	56	39,16	cyclictest	1034820	-21	kworker/1:3	21:55:15	1
983258	99	56	37,18	cyclictest	1145059	-21	kworker/1:0	23:40:13	1
983258	99	56	34,20	cyclictest	982101	-21	kworker/1:2	19:25:14	1
983253	99	56	51,3	cyclictest	1033107	-21	kworker/0:1	21:33:54	0
983258	99	55	52,2	cyclictest	0	-21	swapper/1	22:50:00	1
983258	99	55	40,14	cyclictest	1102719	-21	kworker/1:3	22:56:27	1
983258	99	55	40,14	cyclictest	1087378	-21	kworker/1:0	22:30:16	1
983258	99	55	40,14	cyclictest	1078300	-21	kworker/1:2	22:40:12	1
983258	99	55	40,14	cyclictest	1007231	-21	kworker/1:1	20:37:26	1
983258	99	55	37,17	cyclictest	1044217	-21	kworker/1:1	21:44:55	1
983267	99	54	48,3	cyclictest	40564	-1	kworker/3:2H	23:52:40	3
983258	99	54	39,14	cyclictest	997661	-21	kworker/1:1	20:00:13	1
983258	99	54	39,14	cyclictest	991541	-21	kworker/1:3	19:35:00	1
983258	99	54	36,17	cyclictest	1000759	-21	kworker/1:2	20:15:13	1
983258	99	54	35,17	cyclictest	1069250	-21	kworker/1:0	22:15:15	1
983258	99	54	0,52	cyclictest	0	-21	swapper/1	21:14:27	1
983253	99	54	49,3	cyclictest	1133585	-21	kworker/0:0	23:22:27	0
983258	99	53	38,14	cyclictest	2641011	-1	kworker/1:2H	21:35:12	1
983258	99	53	38,14	cyclictest	1024313	-21	kworker/1:0	21:20:14	1
983258	99	53	1,2	cyclictest	1007231	-21	kworker/1:1	20:21:25	1
983253	99	53	50,2	cyclictest	991486	-21	kworker/0:2	19:39:25	0
983267	99	52	47,3	cyclictest	40564	-1	kworker/3:2H	21:22:32	3
983266	99	52	47,3	cyclictest	1035771	-21	kworker/2:0	21:35:05	2
983266	99	52	47,3	cyclictest	1031571	-21	kworker/2:3	21:24:26	2
983258	99	52	38,14	cyclictest	1173981	-21	kworker/1:2	00:15:14	1
983258	99	52	37,14	cyclictest	982101	-21	kworker/1:2	19:25:01	1
983253	99	51	48,2	cyclictest	991486	-21	kworker/0:2	20:02:25	0
983253	99	51	48,2	cyclictest	991486	-21	kworker/0:2	19:59:53	0
983253	99	51	47,2	cyclictest	2494205	-1	kworker/0:2H	20:30:01	0
983267	99	50	46,3	cyclictest	40564	-1	kworker/3:2H	21:45:42	3
983253	99	50	47,2	cyclictest	1176581	-21	kworker/0:0	00:17:49	0
983253	99	50	47,2	cyclictest	1167636	-21	kworker/0:2	00:10:55	0
983253	99	50	47,2	cyclictest	1019586	-21	kworker/0:2	21:21:00	0
983253	99	50	45,3	cyclictest	2494205	-1	kworker/0:2H	22:10:06	0
983253	99	50	45,3	cyclictest	2494205	-1	kworker/0:2H	22:05:21	0
983267	99	49	44,3	cyclictest	40564	-1	kworker/3:2H	23:57:58	3
983267	99	49	44,3	cyclictest	40564	-1	kworker/3:2H	21:40:14	3
983266	99	49	46,2	cyclictest	1108990	-21	kworker/2:1	23:10:34	2
983266	99	49	46,2	cyclictest	1108990	-21	kworker/2:1	23:10:34	2
983266	99	49	46,2	cyclictest	1031571	-21	kworker/2:3	21:25:23	2
983266	99	49	45,3	cyclictest	1135279	-1	kworker/2:1H	19:41:55	2
983266	99	49	36,11	cyclictest	1135279	-1	kworker/2:1H	23:35:15	2
983266	99	49	36,10	cyclictest	1135279	-1	kworker/2:1H	00:10:14	2
983253	99	49	46,2	cyclictest	1087367	-21	kworker/0:1	23:02:58	0
983253	99	49	45,3	cyclictest	1033107	-21	kworker/0:1	21:46:04	0
983253	99	49	45,3	cyclictest	1033107	-21	kworker/0:1	21:36:25	0
983253	99	49	45,2	cyclictest	2494205	-1	kworker/0:2H	23:30:14	0
983253	99	49	44,3	cyclictest	2494205	-1	kworker/0:2H	00:35:34	0
983267	99	48	44,3	cyclictest	40564	-1	kworker/3:2H	23:34:55	3
983267	99	48	43,3	cyclictest	40564	-1	kworker/3:2H	22:23:57	3
983267	99	48	43,2	cyclictest	40564	-1	kworker/3:2H	21:30:13	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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