OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #8, slot #6

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 rack8slot6s.osadl.org (updated Sat Aug 22, 2026 12:43:40)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
31127	99	1053	1051,2	cyclictest	24449	-21	kworker/1:1+events	09:23:51	1
31119	99	1053	1050,3	cyclictest	13312	-21	kworker/0:1+events	12:35:44	0
31119	99	1053	1050,2	cyclictest	24554	-21	kworker/0:2+events	09:31:06	0
31127	99	1052	1050,2	cyclictest	4360	-21	kworker/1:1+events	08:52:55	1
31127	99	1052	1050,2	cyclictest	31270	-21	kworker/1:2+events	08:39:23	1
31127	99	1052	1050,2	cyclictest	14406	-21	kworker/1:0+events	10:21:17	1
31127	99	1052	1049,3	cyclictest	24449	-21	kworker/1:1+events	09:26:07	1
31127	99	1051	1049,2	cyclictest	31270	-21	kworker/1:2+events	08:32:44	1
31127	99	1051	1049,2	cyclictest	24946	-21	turbostat	08:19:55	1
31127	99	1051	1049,2	cyclictest	19508	-21	kworker/1:2+events	10:38:52	1
31127	99	1051	1049,2	cyclictest	15479	-21	kworker/1:0+events	09:40:23	1
31127	99	1051	1049,2	cyclictest	10937	-21	kworker/1:2+events	09:07:46	1
31127	99	1051	1049,2	cyclictest	10937	-21	kworker/1:2+events	09:03:19	1
31127	99	1051	1048,3	cyclictest	10937	-21	kworker/1:2+events	09:10:54	1
31119	99	1051	1049,2	cyclictest	16353	-21	kworker/0:0+events	09:47:42	0
31119	99	1051	1047,3	cyclictest	3108	-21	kworker/0:2+events	10:42:43	0
31127	99	1050	1048,2	cyclictest	4360	-21	kworker/1:1+events	08:58:20	1
31127	99	1050	1048,2	cyclictest	21155	-21	kworker/1:1+events	10:26:06	1
31127	99	1050	1048,2	cyclictest	21155	-21	kworker/1:1+events	09:53:30	1
31127	99	1050	1048,2	cyclictest	15479	-21	kworker/1:0+events	09:17:13	1
31127	99	1050	1047,3	cyclictest	4360	-21	kworker/1:1+events	08:47:32	1
31127	99	1050	1047,3	cyclictest	31270	-21	kworker/1:2+events	08:43:17	1
31119	99	1050	1048,2	cyclictest	16353	-21	kworker/0:0+events	09:57:34	0
31119	99	1050	1047,3	cyclictest	3108	-21	kworker/0:2+events	11:40:21	0
31119	99	1049	1046,3	cyclictest	30968	-21	kworker/0:2+events	07:18:58	0
31119	99	1049	1046,3	cyclictest	2120	-21	kworker/0:1+events	09:39:37	0
31119	99	1049	1045,3	cyclictest	21669	-21	kworker/0:1+events	11:39:41	0
31119	99	1049	1045,3	cyclictest	1223	-21	kworker/0:1+events	08:05:22	0
31119	99	1048	1046,2	cyclictest	30968	-21	kworker/0:2+events	07:10:23	0
31119	99	1048	1046,2	cyclictest	24554	-21	kworker/0:2+events	08:12:32	0
31119	99	1047	1045,2	cyclictest	25958	-21	kworker/0:1+events	10:01:50	0
31132	99	1044	1043,1	cyclictest	1458	-21	kworker/2:1+events	12:30:44	2
31132	99	1044	1043,1	cyclictest	1458	-21	kworker/2:1+events	12:30:43	2
31132	99	1042	1041,1	cyclictest	24912	-21	kworker/2:0+events	12:28:42	2
31132	99	1038	1035,3	cyclictest	24912	-21	kworker/2:0+events	12:11:05	2
31137	99	1030	1029,1	cyclictest	2403	-21	kworker/3:0+events	10:50:21	3
31132	99	1030	1028,2	cyclictest	24912	-21	kworker/2:0+events	12:16:59	2
31119	99	1030	1028,2	cyclictest	13195	-21	turbostat	09:09:55	0
31127	99	1029	1027,2	cyclictest	19508	-21	kworker/1:2+events	10:34:21	1
31137	99	1026	1025,1	cyclictest	2403	-21	kworker/3:0+events	10:49:43	3
31137	99	1026	1024,2	cyclictest	31308	-21	kworker/3:1+events	11:47:43	3
31132	99	1025	1023,2	cyclictest	24912	-21	kworker/2:0+events	12:21:05	2
31137	99	1023	1021,2	cyclictest	19085	-21	kworker/3:0+events	11:16:17	3
31137	99	1022	1019,2	cyclictest	29010	-21	turbostat	08:29:55	3
31119	99	1020	1017,3	cyclictest	30719	-21	turbostat	11:14:55	0
31137	99	1012	1010,2	cyclictest	1347	-21	kworker/3:2+events	11:32:52	3
31127	99	1005	1001,4	cyclictest	2692	-21	turbostat	10:44:55	1
31137	99	1001	1000,1	cyclictest	5278	-21	kworker/3:1+events	07:40:22	3
31137	99	997	996,1	cyclictest	14955	-21	kworker/3:2+events	12:07:52	3
31137	99	995	994,1	cyclictest	27421	-21	kworker/3:1+events	10:15:22	3
31137	99	995	994,1	cyclictest	10080	-21	kworker/3:0+events	12:03:22	3
31137	99	995	992,1	cyclictest	14603	-21	kworker/3:2+events	07:55:22	3
31137	99	993	992,1	cyclictest	7259	-21	kworker/3:1+events	10:56:06	3
31137	99	993	992,1	cyclictest	6168	-21	kworker/3:1+events	11:20:45	3
31132	99	993	991,2	cyclictest	11915	-21	turbostat	10:54:55	2
31137	99	992	990,1	cyclictest	1347	-21	kworker/3:2+events	11:25:22	3
31137	99	990	989,1	cyclictest	19085	-21	kworker/3:0+events	11:08:38	3
31137	99	989	988,1	cyclictest	1347	-21	kworker/3:2+events	11:52:00	3
31137	99	988	987,1	cyclictest	7259	-21	kworker/3:1+events	11:10:43	3
31137	99	988	987,1	cyclictest	5278	-21	kworker/3:1+events	07:35:21	3
31137	99	987	986,1	cyclictest	2403	-21	kworker/3:0+events	10:14:46	3
31137	99	986	985,1	cyclictest	7259	-21	kworker/3:1+events	11:03:03	3
31137	99	986	985,1	cyclictest	5278	-21	kworker/3:1+events	07:33:13	3
31137	99	983	982,1	cyclictest	27421	-21	kworker/3:1+events	08:22:15	3
31137	99	983	982,1	cyclictest	26844	-21	kworker/3:0+events	07:23:16	3
31137	99	983	982,1	cyclictest	14603	-21	kworker/3:2+events	08:18:10	3
31137	99	983	982,1	cyclictest	14603	-21	kworker/3:2+events	08:04:22	3
31137	99	983	982,1	cyclictest	10080	-21	kworker/3:0+events	11:56:06	3
31137	99	982	981,1	cyclictest	5278	-21	kworker/3:1+events	07:28:25	3
31137	99	982	981,1	cyclictest	2403	-21	kworker/3:0+events	10:07:45	3
31127	99	978	976,2	cyclictest	26749	-21	turbostat	11:44:55	1
31127	99	977	975,2	cyclictest	18884	-21	turbostat	08:04:55	1
31137	99	976	974,2	cyclictest	30216	-21	turbostat	10:04:55	3
31137	99	968	967,1	cyclictest	14603	-21	kworker/3:2+events	07:47:33	3
31137	99	967	964,1	cyclictest	8374	-21	kworker/3:0+events	07:53:06	3
31127	99	941	938,3	cyclictest	653	-21	turbostat	07:19:55	1
31119	99	933	931,2	cyclictest	17373	-21	turbostat	12:09:55	0
31127	99	924	922,2	cyclictest	16886	-21	turbostat	07:59:54	1
31119	99	924	922,2	cyclictest	14872	-21	turbostat	07:54:55	0
31137	99	915	913,2	cyclictest	20619	-21	turbostat	09:54:55	3
31132	99	910	907,3	cyclictest	17145	-21	turbostat	11:34:55	2
31132	99	901	899,2	cyclictest	16019	-21	turbostat	09:49:55	2
31137	99	900	896,3	cyclictest	11382	-21	turbostat	09:44:55	3
31137	99	885	883,2	cyclictest	29555	-21	turbostat	09:29:55	3
31137	99	883	881,2	cyclictest	8370	-21	turbostat	12:34:55	3
31137	99	883	881,2	cyclictest	8370	-21	turbostat	12:34:55	3
31127	99	864	863,1	cyclictest	21732	-21	turbostat	11:39:55	1
31127	99	693	690,3	cyclictest	16019	-21	turbostat	09:49:55	1
31119	99	685	682,3	cyclictest	17145	-21	turbostat	11:34:55	0
31137	99	673	670,3	cyclictest	22928	-21	turbostat	08:14:54	3
31132	99	668	665,3	cyclictest	17373	-21	turbostat	12:09:55	2
31127	99	668	665,3	cyclictest	29010	-21	turbostat	08:29:55	1
31137	99	663	662,1	cyclictest	2692	-21	turbostat	10:44:55	3
31137	99	639	637,2	cyclictest	26749	-21	turbostat	11:44:55	3
31127	99	604	603,1	cyclictest	11642	-21	turbostat	10:19:55	1
31119	99	603	602,1	cyclictest	30479	-21	turbostat	10:39:55	0
31127	99	568	566,2	cyclictest	6367	-21	turbostat	09:39:55	1
31119	99	546	545,1	cyclictest	20619	-21	turbostat	09:54:55	0
31119	99	529	526,3	cyclictest	11382	-21	turbostat	09:44:55	0
31119	99	518	515,3	cyclictest	29555	-21	turbostat	09:29:55	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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