OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Mon Apr 20, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1189539	2	268	0,3	sleep3	75	-21	kworker/3:1-events	23:31:18	3
1246267	2	183	0,2	sleep3	47	1	rcuc/3	00:26:20	3
927723	99	65	61,3	cyclictest	1002796	-21	kworker/u8:2+events_unbound	20:21:29	2
927720	99	61	55,5	cyclictest	1002796	-21	kworker/u8:2+flush-8:0	20:31:29	1
927720	99	61	44,4	cyclictest	1002796	-21	kworker/u8:2+events_unbound	20:26:14	1
927723	99	60	55,4	cyclictest	1002796	-21	kworker/u8:2+flush-8:0	21:01:29	2
927720	99	60	55,3	cyclictest	988919	-21	kworker/u8:0+events_unbound	20:16:26	1
927720	99	60	47,5	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	21:56:17	1
927720	99	60	47,5	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	21:56:17	1
927720	99	58	52,4	cyclictest	954199	-21	kworker/u8:2+flush-8:0	19:56:28	1
927720	99	58	50,6	cyclictest	1088260	-21	kworker/u8:1+flush-8:0	21:51:24	1
927720	99	58	50,6	cyclictest	1088260	-21	kworker/u8:1+flush-8:0	21:51:24	1
1063909	2	58	0,5	sleep2	0	-21	swapper/2	21:25:01	2
927720	99	56	51,4	cyclictest	1211580	-21	kworker/u8:1+events_unbound	00:36:14	1
927720	99	56	51,3	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	22:41:27	1
927720	99	56	51,3	cyclictest	1013882	-21	kworker/u8:0+events_unbound	21:26:27	1
927720	99	56	51,3	cyclictest	1002796	-21	kworker/u8:2+events_unbound	20:41:27	1
927720	99	56	50,4	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	22:51:27	1
927720	99	55	50,3	cyclictest	1123400	-21	kworker/u8:2+events_unbound	23:51:26	1
927720	99	55	50,3	cyclictest	1123400	-21	kworker/u8:2+events_unbound	23:51:26	1
927720	99	55	49,5	cyclictest	95632	-21	kworker/u8:0+events_unbound	19:15:03	1
927720	99	55	49,5	cyclictest	1013882	-21	kworker/u8:0+events_unbound	22:26:14	1
927720	99	55	49,4	cyclictest	1002796	-21	kworker/u8:2+events_unbound	21:15:01	1
927720	99	55	48,5	cyclictest	95632	-21	kworker/u8:0+flush-8:0	19:21:24	1
986041	2	54	0,4	sleep1	28	1	rcuc/1	20:06:19	1
927720	99	54	49,3	cyclictest	1013882	-21	kworker/u8:0+events_unbound	23:11:22	1
927720	99	54	48,5	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:56:28	1
927720	99	54	48,5	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:56:28	1
927720	99	53	47,5	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	22:31:23	1
927720	99	53	47,4	cyclictest	1123400	-21	kworker/u8:2+events_unbound	23:16:27	1
927723	99	52	47,4	cyclictest	1182923	-21	kworker/u8:3+flush-8:0	23:46:27	2
927720	99	52	46,5	cyclictest	101845	-21	kworker/u8:1+flush-8:0	20:46:24	1
927720	99	52	46,4	cyclictest	1013882	-21	kworker/u8:0+events_unbound	22:15:01	1
927720	99	52	37,5	cyclictest	1002796	-21	kworker/u8:2+events_unbound	21:36:27	1
1242870	2	52	0,4	sleep1	28	1	rcuc/1	00:25:01	1
927720	99	51	47,3	cyclictest	964257	-21	kworker/u8:3+events_unbound	20:01:27	1
927720	99	51	46,3	cyclictest	1211580	-21	kworker/u8:1+flush-8:0	00:16:24	1
927720	99	51	40,5	cyclictest	1013882	-21	kworker/u8:0+events_unbound	21:31:13	1
927723	99	50	45,4	cyclictest	1217707	-21	kworker/u8:4+events_unbound	00:21:31	2
927720	99	50	43,5	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	20:56:23	1
927720	99	50	42,6	cyclictest	4184474	-21	kworker/u8:3+flush-8:0	19:31:23	1
927717	99	50	43,5	cyclictest	932596	-21	latency_hist	19:15:01	0
927720	99	49	42,6	cyclictest	1013882	-21	kworker/u8:0+events_unbound	22:56:24	1
927720	99	49	42,5	cyclictest	101845	-21	kworker/u8:1+flush-8:0	21:16:25	1
927717	99	49	44,3	cyclictest	1182923	-21	kworker/u8:3+flush-8:0	23:26:28	0
927723	99	48	44,3	cyclictest	4184474	-21	kworker/u8:3+events_unbound	19:11:25	2
927723	99	48	43,4	cyclictest	1211580	-21	kworker/u8:1+events_unbound	00:06:33	2
927720	99	48	43,4	cyclictest	1088260	-21	kworker/u8:1+flush-8:0	22:21:24	1
927720	99	48	43,3	cyclictest	1238040	-21	kworker/u8:0+events_unbound	00:26:18	1
927720	99	48	41,5	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:06:25	1
927717	99	48	36,9	cyclictest	1082741	-21	ntpq	21:41:22	0
927720	99	47	41,5	cyclictest	1088260	-21	kworker/u8:1+flush-8:0	22:16:24	1
927720	99	47	41,4	cyclictest	1182923	-21	kworker/u8:3+events_unbound	23:26:18	1
927720	99	47	41,4	cyclictest	1002796	-21	kworker/u8:2+flush-8:0	21:21:24	1
927717	99	47	39,6	cyclictest	988919	-21	kworker/u8:0+flush-8:0	20:11:24	0
927720	99	46	41,4	cyclictest	4184474	-21	kworker/u8:3+events_unbound	19:26:25	1
927720	99	46	39,5	cyclictest	101845	-21	kworker/u8:1+events_unbound	19:36:17	1
927723	99	45	33,9	cyclictest	1177507	-21	apt-get	23:20:00	2
927720	99	45	39,4	cyclictest	101845	-21	kworker/u8:1+events_unbound	20:21:19	1
927720	99	45	39,4	cyclictest	1002796	-21	kworker/u8:2+flush-8:0	20:40:01	1
927717	99	45	40,3	cyclictest	1053698	-21	gpgv	21:15:00	0
927720	99	44	40,3	cyclictest	1088260	-21	kworker/u8:1+events_unbound	22:36:24	1
927720	99	44	37,5	cyclictest	1013882	-21	kworker/u8:0+events_unbound	20:51:21	1
927717	99	44	33,9	cyclictest	1127255	-21	ntpq	22:26:24	0
927723	99	43	38,3	cyclictest	101845	-21	kworker/u8:1+events_unbound	19:36:13	2
927720	99	43	37,5	cyclictest	954199	-21	kworker/u8:2+flush-8:0	19:46:22	1
927720	99	43	36,5	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	21:41:23	1
927720	99	42	35,5	cyclictest	954199	-21	kworker/u8:2+events_unbound	19:41:23	1
927720	99	42	34,6	cyclictest	1077828	-21	kworker/u8:3+flush-8:0	21:46:24	1
927720	99	41	36,4	cyclictest	964257	-21	kworker/u8:3+events_unbound	19:51:17	1
927720	99	41	33,6	cyclictest	1123400	-21	kworker/u8:2+events_unbound	23:41:25	1
927717	99	41	34,5	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:51:27	0
927717	99	41	34,5	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:51:26	0
927723	99	40	36,3	cyclictest	1088260	-21	kworker/u8:1+events_unbound	22:16:30	2
927723	99	40	35,4	cyclictest	1088260	-21	kworker/u8:1+events_unbound	21:51:29	2
927723	99	40	35,4	cyclictest	1088260	-21	kworker/u8:1+events_unbound	21:51:29	2
927720	99	40	35,4	cyclictest	1217707	-21	kworker/u8:4+events_unbound	00:11:13	1
927720	99	40	34,4	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:21:12	1
927720	99	40	34,4	cyclictest	1047909	-21	ntpq	21:06:25	1
927720	99	40	33,5	cyclictest	1088260	-21	kworker/u8:1+events_unbound	22:01:25	1
927717	99	40	36,3	cyclictest	1211580	-21	kworker/u8:1+flush-8:0	00:01:29	0
927720	99	39	32,5	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	23:01:19	1
927720	99	39	31,5	cyclictest	1211580	-21	kworker/u8:1+flush-8:0	00:01:14	1
927717	99	39	35,3	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	21:56:21	0
927717	99	39	35,3	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	21:56:21	0
927717	99	39	34,3	cyclictest	101845	-21	kworker/u8:1+flush-8:0	20:36:15	0
927717	99	39	31,6	cyclictest	1237792	-21	latency_hist	00:20:00	0
927717	99	39	30,6	cyclictest	1207504	-21	latency_hist	23:50:01	0
927720	99	37	31,4	cyclictest	988919	-21	kworker/u8:0+flush-8:0	20:11:16	1
927720	99	37	30,5	cyclictest	1217707	-21	kworker/u8:4+flush-8:0	00:31:20	1
927720	99	37	30,4	cyclictest	4184474	-21	kworker/u8:3+events_unbound	19:11:17	1
927717	99	37	31,4	cyclictest	964257	-21	kworker/u8:3+events_unbound	19:56:22	0
927717	99	37	28,7	cyclictest	280	-21	systemd-journal	19:15:05	0
927717	99	37	28,6	cyclictest	1257629	-21	latency_hist	00:40:01	0
927717	99	36	31,3	cyclictest	964257	-21	kworker/u8:3+flush-8:0	19:51:24	0
927717	99	36	30,5	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	22:46:30	0
927717	99	36	30,4	cyclictest	1182923	-21	kworker/u8:3+flush-8:0	00:06:21	0
927717	99	36	30,4	cyclictest	1013882	-21	kworker/u8:0+flush-8:0	23:11:30	0
927446	2	36	4,10	sleep1	0	-21	swapper/1	19:08:37	1
927720	99	35	29,4	cyclictest	1123400	-21	kworker/u8:2+flush-8:0	22:46:19	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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