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 Tue Sep 01, 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
24638	99	1053	1050,3	cyclictest	22475	-21	kworker/3:0+events	10:42:35	3
24638	99	1052	1051,1	cyclictest	3394	-21	kworker/3:0+events	08:56:47	3
24638	99	1052	1050,2	cyclictest	4108	-21	kworker/3:0+events	11:28:17	3
24638	99	1052	1050,2	cyclictest	32318	-21	kworker/3:0+events	09:52:10	3
24638	99	1052	1050,2	cyclictest	31629	-21	kworker/3:1+events	11:50:54	3
24638	99	1052	1050,2	cyclictest	30023	-21	kworker/3:1+events	10:26:51	3
24638	99	1052	1049,3	cyclictest	3394	-21	kworker/3:0+events	09:19:07	3
24638	99	1052	1049,3	cyclictest	32318	-21	kworker/3:0+events	09:41:25	3
24638	99	1052	1049,3	cyclictest	14058	-21	kworker/3:2+events	08:11:05	3
24638	99	1051	1049,2	cyclictest	8345	-21	kworker/3:1+events	08:02:13	3
24638	99	1051	1049,2	cyclictest	8345	-21	kworker/3:1+events	07:53:39	3
24638	99	1051	1049,2	cyclictest	32318	-21	kworker/3:0+events	10:14:11	3
24638	99	1051	1049,2	cyclictest	32318	-21	kworker/3:0+events	09:45:22	3
24638	99	1051	1049,2	cyclictest	31629	-21	kworker/3:1+events	11:24:25	3
24638	99	1051	1049,2	cyclictest	18909	-21	kworker/3:2+events	09:24:12	3
24638	99	1051	1049,2	cyclictest	18115	-21	kworker/3:0+events	08:17:15	3
24638	99	1051	1049,2	cyclictest	16564	-21	kworker/3:3+events	11:16:06	3
24638	99	1051	1049,2	cyclictest	14058	-21	kworker/3:2+events	08:05:43	3
24638	99	1051	1049,2	cyclictest	11403	-21	kworker/3:1+events	09:57:35	3
24638	99	1051	1049,2	cyclictest	11036	-21	kworker/3:0+events	07:56:28	3
24638	99	1051	1048,3	cyclictest	22475	-21	kworker/3:0+events	10:57:11	3
24638	99	1050	1048,2	cyclictest	32318	-21	kworker/3:0+events	10:23:49	3
24638	99	1050	1048,2	cyclictest	31629	-21	kworker/3:1+events	11:44:05	3
24638	99	1050	1048,2	cyclictest	30023	-21	kworker/3:1+events	10:08:02	3
24638	99	1050	1048,2	cyclictest	23650	-21	kworker/3:0+events	11:49:13	3
24638	99	1050	1048,2	cyclictest	22475	-21	kworker/3:0+events	10:49:44	3
24638	99	1050	1048,2	cyclictest	17583	-21	kworker/3:2+events	10:35:20	3
24638	99	1050	1048,2	cyclictest	1125	-21	kworker/3:2+events	08:50:44	3
24638	99	1050	1047,3	cyclictest	21389	-21	kworker/3:0+events	11:10:45	3
24626	99	1050	1046,3	cyclictest	8756	-21	kworker/0:2+events	09:27:23	0
24638	99	1049	1047,2	cyclictest	32318	-21	kworker/3:0+events	10:01:50	3
24638	99	1049	1047,2	cyclictest	31629	-21	kworker/3:1+events	11:33:18	3
24638	99	1049	1046,3	cyclictest	15172	-21	kworker/3:1+events	11:02:11	3
24626	99	1049	1047,2	cyclictest	1455	-21	kworker/0:2+events	12:11:05	0
24638	99	1048	1046,2	cyclictest	32318	-21	kworker/3:0+events	09:37:47	3
24638	99	1047	1044,3	cyclictest	30023	-21	kworker/3:1+events	10:17:21	3
24626	99	1047	1045,2	cyclictest	28323	-21	kworker/0:1+events	11:59:41	0
24626	99	1047	1045,2	cyclictest	1455	-21	kworker/0:2+events	12:25:23	0
24626	99	1046	1043,3	cyclictest	32685	-21	turbostat	10:14:55	0
24638	99	1045	1043,2	cyclictest	22475	-21	kworker/3:0+events	10:54:03	3
24638	99	1044	1042,2	cyclictest	16564	-21	kworker/3:3+events	11:07:58	3
24626	99	1044	1041,3	cyclictest	28323	-21	kworker/0:1+events	09:32:13	0
24626	99	1043	1042,1	cyclictest	11120	-21	kworker/0:0+events	12:18:04	0
24629	99	1041	1040,1	cyclictest	11401	-21	kworker/1:0+events	12:31:37	1
24626	99	1040	1035,4	cyclictest	1455	-21	kworker/0:2+events	12:06:06	0
24638	99	1037	1035,2	cyclictest	31629	-21	kworker/3:1+events	11:37:11	3
24629	99	1035	1033,2	cyclictest	20832	-21	kworker/1:2+events	09:10:43	1
24626	99	1035	1032,3	cyclictest	1455	-21	kworker/0:2+events	12:21:59	0
24638	99	1033	1030,3	cyclictest	30023	-21	kworker/3:1+events	10:30:44	3
24626	99	1033	1031,2	cyclictest	9231	-21	turbostat	09:14:55	0
24629	99	1030	1029,1	cyclictest	20832	-21	kworker/1:2+events	09:02:38	1
24633	99	1022	1020,2	cyclictest	21822	-21	kworker/2:1+events	12:03:08	2
24638	99	1021	1019,2	cyclictest	24607	-21	turbostat	12:24:56	3
24633	99	1016	1014,2	cyclictest	28079	-21	turbostat	10:09:55	2
24629	99	1007	1006,1	cyclictest	26823	-21	kworker/1:1+events	07:48:18	1
24629	99	991	990,1	cyclictest	11401	-21	kworker/1:0+events	12:37:58	1
24626	99	991	988,3	cyclictest	31528	-21	turbostat	08:49:54	0
24629	99	986	985,1	cyclictest	20832	-21	kworker/1:2+events	09:05:44	1
24629	99	984	983,1	cyclictest	29448	-21	kworker/1:1+events	08:43:19	1
24638	99	971	969,2	cyclictest	20545	-21	turbostat	08:24:54	3
24629	99	958	957,1	cyclictest	20832	-21	kworker/1:2+events	08:46:47	1
24629	99	957	956,1	cyclictest	3923	-21	kworker/1:2+events	07:37:56	1
24629	99	957	956,1	cyclictest	26823	-21	kworker/1:1+events	07:20:44	1
24626	99	957	955,2	cyclictest	4872	-21	turbostat	10:19:56	0
24629	99	955	954,1	cyclictest	6041	-21	kworker/1:0+events	08:31:50	1
24629	99	955	954,1	cyclictest	3949	-21	kworker/1:0+events	07:18:47	1
24629	99	953	952,1	cyclictest	20832	-21	kworker/1:2+events	08:29:46	1
24629	99	952	951,1	cyclictest	31171	-21	kworker/1:2+events	07:25:46	1
24629	99	951	950,1	cyclictest	6041	-21	kworker/1:0+events	08:35:44	1
24629	99	951	950,1	cyclictest	20832	-21	kworker/1:2+events	08:22:56	1
24629	99	950	949,1	cyclictest	6041	-21	kworker/1:0+events	07:41:53	1
24629	99	947	946,1	cyclictest	26823	-21	kworker/1:1+events	07:33:44	1
24629	99	944	943,1	cyclictest	3949	-21	kworker/1:0+events	07:12:32	1
24629	99	934	932,2	cyclictest	1130	-21	turbostat	11:59:55	1
24629	99	926	924,2	cyclictest	9923	-21	turbostat	10:24:55	1
24629	99	918	916,2	cyclictest	29256	-21	turbostat	12:29:56	1
24626	99	871	869,2	cyclictest	18472	-21	turbostat	08:19:54	0
24638	99	864	862,2	cyclictest	5731	-21	turbostat	12:04:56	3
24638	99	684	682,2	cyclictest	27785	-21	turbostat	09:34:55	3
24638	99	614	610,4	cyclictest	9231	-21	turbostat	09:14:55	3
24638	99	605	602,3	cyclictest	6352	-21	turbostat	07:49:54	3
24626	99	598	595,3	cyclictest	28931	-21	turbostat	11:54:56	0
24626	99	596	593,3	cyclictest	5731	-21	turbostat	12:04:55	0
24626	99	588	586,2	cyclictest	18545	-21	turbostat	09:24:56	0
24638	99	568	567,1	cyclictest	31528	-21	turbostat	08:49:54	3
24633	99	536	533,3	cyclictest	1130	-21	turbostat	11:59:55	2
24629	99	535	531,4	cyclictest	18472	-21	turbostat	08:19:54	1
24629	99	527	525,2	cyclictest	3168	-21	turbostat	08:59:56	1
24638	99	24	0,24	cyclictest	791	-21	runrttasks	11:59:41	3
24633	99	19	19,0	cyclictest	21822	-21	kworker/2:1+events_freezable	11:51:20	2
24633	99	19	19,0	cyclictest	21822	-21	kworker/2:1+events_freezable	10:04:11	2
24638	99	18	18,0	cyclictest	677	50	irq/123-lan	12:39:56	3
24638	99	18	18,0	cyclictest	677	50	irq/123-lan	07:30:21	3
24638	99	18	17,1	cyclictest	677	50	irq/123-lan	12:15:14	3
24638	99	18	17,1	cyclictest	677	50	irq/123-lan	12:10:17	3
24638	99	18	17,1	cyclictest	677	50	irq/123-lan	07:35:17	3
24633	99	18	17,1	cyclictest	784	-21	snmpd	09:07:16	2
24638	99	17	17,0	cyclictest	677	50	irq/123-lan	12:31:31	3
24638	99	17	17,0	cyclictest	677	50	irq/123-lan	08:40:15	3
24638	99	17	17,0	cyclictest	677	50	irq/123-lan	07:20:15	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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