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 Sun Jul 05, 2026 12:44:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4109655	2	220	0,4	sleep3	75	-21	kworker/3:1+events	08:30:24	3
4023880	99	70	65,3	cyclictest	4132762	-21	kworker/u8:2+flush-8:0	09:55:28	1
4023884	99	66	61,4	cyclictest	95002	-21	kworker/u8:1+flush-8:0	11:35:26	2
4023880	99	64	58,3	cyclictest	4147809	-21	kworker/u8:0+events_unbound	10:25:14	1
4023884	99	63	58,3	cyclictest	21785	-21	kworker/u8:2+events_unbound	11:00:13	2
4023880	99	63	58,3	cyclictest	106129	-21	kworker/u8:4+events_unbound	12:25:24	1
4023877	99	63	54,6	cyclictest	1704890	-21	systemd-journal	10:55:00	0
4023884	99	62	58,3	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:20:26	2
4023884	99	62	58,3	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:20:25	2
4023877	99	62	56,4	cyclictest	4050389	-21	kworker/u8:3+flush-8:0	07:50:25	0
4023877	99	62	37,9	cyclictest	90055	-21	ntpq	11:25:21	0
4023877	99	62	37,9	cyclictest	90055	-21	ntpq	11:25:20	0
4083371	2	61	0,4	chrt	0	-21	swapper/0	08:05:18	0
4023884	99	61	56,4	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	10:00:28	2
4023884	99	60	55,3	cyclictest	3675301	-21	kworker/u8:2+flush-8:0	07:25:25	2
4023880	99	59	53,4	cyclictest	3987064	-21	kworker/u8:0+flush-8:0	07:20:26	1
4023880	99	58	52,5	cyclictest	3675301	-21	kworker/u8:2+flush-8:0	08:20:24	1
4023880	99	58	52,5	cyclictest	3675301	-21	kworker/u8:2+flush-8:0	08:20:24	1
4023880	99	58	52,4	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	09:40:22	1
4023880	99	58	52,4	cyclictest	106129	-21	kworker/u8:4+flush-8:0	12:15:29	1
4023880	99	57	52,3	cyclictest	61455	-21	kworker/u8:3+flush-8:0	12:05:21	1
4023880	99	57	50,5	cyclictest	4095708	-21	kworker/u8:1+events_unbound	09:00:23	1
4023880	99	57	50,4	cyclictest	3675301	-21	kworker/u8:2+flush-8:0	07:30:26	1
4023880	99	57	49,6	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:05:26	1
4023880	99	57	49,6	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:05:26	1
4023880	99	57	44,9	cyclictest	21785	-21	kworker/u8:2+flush-8:0	10:45:25	1
4023877	99	57	45,9	cyclictest	70010	-21	ntpq	11:05:23	0
4023877	99	57	45,9	cyclictest	70010	-21	ntpq	11:05:22	0
4023884	99	56	52,3	cyclictest	48599	-21	kworker/u8:1+flush-8:0	10:45:23	2
4023880	99	56	49,5	cyclictest	6211	-21	kworker/u8:1+flush-8:0	10:15:21	1
4023884	99	55	49,4	cyclictest	4105627	-21	kworker/u8:0+events_unbound	08:30:24	2
4023880	99	55	49,5	cyclictest	4105627	-21	kworker/u8:0+events_unbound	08:40:24	1
4023880	99	54	49,4	cyclictest	4132762	-21	kworker/u8:2+flush-8:0	09:15:13	1
4023880	99	54	49,4	cyclictest	3675301	-21	kworker/u8:2+events_unbound	07:55:13	1
4023880	99	54	48,5	cyclictest	4095708	-21	kworker/u8:1+events_unbound	08:55:29	1
4023880	99	54	48,4	cyclictest	4050389	-21	kworker/u8:3+flush-8:0	07:45:24	1
4023884	99	53	49,3	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:40:21	2
4023884	99	53	49,3	cyclictest	4132762	-21	kworker/u8:2+events_unbound	09:30:24	2
4023880	99	53	49,3	cyclictest	21785	-21	kworker/u8:2+events_unbound	10:40:19	1
4023880	99	53	46,5	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	11:10:23	1
4023880	99	53	46,5	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	11:10:22	1
4023880	99	53	46,5	cyclictest	4095708	-21	kworker/u8:1+flush-8:0	09:05:24	1
4023880	99	53	40,9	cyclictest	1704890	-21	systemd-journal	10:36:13	1
4023877	99	53	42,8	cyclictest	4135165	-21	apt-get	09:00:00	0
4023884	99	52	48,3	cyclictest	4132762	-21	kworker/u8:2+events_unbound	09:15:25	2
4023884	99	52	47,3	cyclictest	4147809	-21	kworker/u8:0+events_unbound	10:30:26	2
4023880	99	52	48,3	cyclictest	4132762	-21	kworker/u8:2+flush-8:0	09:10:29	1
4023880	99	52	46,4	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	10:05:15	1
4023880	99	51	48,2	cyclictest	150157	-21	kworker/u8:0+events_unbound	12:30:26	1
4023880	99	51	46,4	cyclictest	4050389	-21	kworker/u8:3+flush-8:0	07:40:25	1
4023880	99	51	45,5	cyclictest	95002	-21	kworker/u8:1+events_unbound	11:30:23	1
4023884	99	50	44,4	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:30:19	2
4023880	99	50	45,4	cyclictest	61455	-21	kworker/u8:3+events_unbound	12:10:19	1
4023880	99	50	44,4	cyclictest	4105627	-21	kworker/u8:0+events_unbound	08:35:12	1
4023880	99	50	43,5	cyclictest	4132762	-21	kworker/u8:2+events_unbound	09:25:23	1
4023880	99	50	43,5	cyclictest	4095708	-21	kworker/u8:1+events_unbound	08:25:21	1
4023884	99	49	45,3	cyclictest	4132762	-21	kworker/u8:2+events_unbound	09:55:00	2
4023884	99	49	45,3	cyclictest	3675301	-21	kworker/u8:2+events_unbound	07:55:20	2
4023884	99	49	43,4	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	11:25:11	2
4023884	99	49	43,4	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	11:25:11	2
4023880	99	49	43,5	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	09:20:16	1
4023880	99	49	43,5	cyclictest	4095708	-21	kworker/u8:1+flush-8:0	08:50:23	1
4023880	99	49	42,5	cyclictest	4074552	-21	kworker/u8:0+flush-8:0	08:05:24	1
4023877	99	49	40,6	cyclictest	1704890	-21	systemd-journal	09:00:14	0
4023884	99	48	44,3	cyclictest	21785	-21	kworker/u8:2+events_unbound	10:20:25	2
4023884	99	48	43,4	cyclictest	106129	-21	kworker/u8:4+events_unbound	11:45:28	2
4023884	99	48	43,3	cyclictest	4050389	-21	kworker/u8:3+events_unbound	07:45:11	2
4023880	99	48	41,5	cyclictest	3675301	-21	kworker/u8:2+flush-8:0	08:00:26	1
4023877	99	48	30,8	cyclictest	1704890	-21	systemd-journal	08:43:13	0
4023884	99	47	43,3	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	10:10:20	2
4023884	99	47	43,3	cyclictest	4147809	-21	kworker/u8:0+events_unbound	09:20:24	2
4023884	99	47	42,4	cyclictest	35845	-21	kworker/u8:4+flush-8:0	10:35:22	2
4023884	99	47	42,4	cyclictest	150157	-21	kworker/u8:0+flush-8:0	12:30:23	2
4023880	99	47	43,3	cyclictest	3675301	-21	kworker/u8:2+events_unbound	07:50:10	1
4023880	99	47	41,5	cyclictest	6211	-21	kworker/u8:1+events_unbound	10:10:25	1
4023880	99	47	41,4	cyclictest	21785	-21	kworker/u8:2+events_unbound	10:50:12	1
4023880	99	47	40,6	cyclictest	4147809	-21	kworker/u8:0+events_unbound	10:20:22	1
4023884	99	46	41,4	cyclictest	106129	-21	kworker/u8:4+events_unbound	11:55:00	2
4023880	99	46	41,4	cyclictest	95002	-21	kworker/u8:1+events_unbound	12:00:28	1
4023880	99	46	41,4	cyclictest	85280	-21	kworker/u8:2+events_unbound	11:25:26	1
4023880	99	46	41,4	cyclictest	85280	-21	kworker/u8:2+events_unbound	11:25:25	1
4023880	99	46	41,4	cyclictest	4147809	-21	kworker/u8:0+events_unbound	11:00:09	1
4023880	99	46	40,4	cyclictest	4074552	-21	kworker/u8:0+flush-8:0	08:15:20	1
4023880	99	46	40,4	cyclictest	3675301	-21	kworker/u8:2+events_unbound	07:25:17	1
4023880	99	45	40,3	cyclictest	6211	-21	kworker/u8:1+events_unbound	10:30:17	1
4023880	99	45	40,3	cyclictest	4105627	-21	kworker/u8:0+flush-8:0	08:50:00	1
4023880	99	45	39,5	cyclictest	4074552	-21	kworker/u8:0+flush-8:0	08:10:21	1
4023880	99	45	39,4	cyclictest	4132762	-21	kworker/u8:2+flush-8:0	09:35:15	1
4023880	99	45	38,6	cyclictest	21785	-21	kworker/u8:2+flush-8:0	10:55:12	1
4023877	99	45	37,6	cyclictest	4147809	-21	kworker/u8:0+flush-8:0	10:20:06	0
4023880	99	44	40,3	cyclictest	61455	-21	kworker/u8:3+flush-8:0	12:35:20	1
4023880	99	44	39,4	cyclictest	70771	-21	kworker/u8:1+events_unbound	11:15:12	1
4023880	99	44	39,4	cyclictest	4132762	-21	kworker/u8:2+events_unbound	10:00:14	1
4023880	99	44	38,4	cyclictest	3675301	-21	kworker/u8:2+events_unbound	07:15:20	1
4023877	99	44	35,7	cyclictest	1704890	-21	systemd-journal	09:10:01	0
4023877	99	44	35,6	cyclictest	4055620	-21	latency_hist	07:40:01	0
113029	2	44	0,3	sleep1	0	-21	swapper/1	11:50:17	1
4023884	99	43	38,3	cyclictest	21031	-21	apt-get	10:20:00	2
4023880	99	43	37,5	cyclictest	106129	-21	kworker/u8:4+flush-8:0	11:45:11	1
4023880	99	43	36,5	cyclictest	61455	-21	kworker/u8:3+flush-8:0	11:55:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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