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 Jun 22, 2026 12:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2785827	2	103	0,2	sleep3	75	-21	kworker/3:1-events	10:10:28	3
2603339	99	76	62,11	cyclictest	1704890	-21	systemd-journal	08:15:35	0
2603339	99	72	67,4	cyclictest	2630221	-21	kworker/u8:1+flush-8:0	07:40:35	0
2603339	99	72	65,5	cyclictest	2804452	-21	kworker/u8:0+flush-8:0	10:40:39	0
2603339	99	70	63,6	cyclictest	2854451	-21	kworker/u8:1+flush-8:0	11:20:37	0
2603340	99	69	60,7	cyclictest	2908894	-21	kworker/u8:0+flush-8:0	12:30:38	1
2603339	99	69	62,5	cyclictest	1264902	-21	kworker/u8:2+events_unbound	10:25:35	0
2603339	99	67	62,4	cyclictest	2551647	-21	kworker/u8:0+events_unbound	07:30:37	0
2603339	99	67	53,5	cyclictest	1264902	-21	kworker/u8:2+events_unbound	10:10:40	0
2603339	99	65	60,3	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	09:40:39	0
2603339	99	65	60,3	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	09:40:39	0
2603339	99	65	59,5	cyclictest	2804452	-21	kworker/u8:0+events_unbound	11:00:38	0
2603339	99	64	59,4	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:25:38	0
2603339	99	64	58,4	cyclictest	2551647	-21	kworker/u8:0+flush-8:0	09:15:36	0
2603339	99	64	57,5	cyclictest	2863827	-21	kworker/u8:2+events_unbound	12:35:38	0
2603339	99	64	56,6	cyclictest	2834413	-21	kworker/u8:3+flush-8:0	11:45:33	0
2603340	99	62	52,7	cyclictest	2913812	-21	latency_hist	12:20:00	1
2603339	99	62	58,3	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	10:45:36	0
2603339	99	62	55,5	cyclictest	2719542	-21	kworker/u8:1+flush-8:0	09:30:34	0
2603340	99	61	51,7	cyclictest	1704890	-21	systemd-journal	11:40:01	1
2603339	99	61	48,11	cyclictest	2551647	-21	kworker/u8:0+flush-8:0	07:15:06	0
2603339	99	59	52,4	cyclictest	1264902	-21	kworker/u8:2+events_unbound	09:20:37	0
2603339	99	59	50,6	cyclictest	2750077	-21	apt-get	09:35:16	0
2603339	99	59	49,7	cyclictest	2649337	-21	ntpq	07:50:34	0
2603340	99	58	52,4	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	08:45:37	1
2603339	99	58	53,3	cyclictest	2863827	-21	kworker/u8:2+events_unbound	12:20:35	0
2603339	99	58	52,5	cyclictest	2719542	-21	kworker/u8:1+flush-8:0	09:45:32	0
2603340	99	57	51,4	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	07:20:01	1
2603339	99	57	46,8	cyclictest	2709028	-21	ntpq	08:50:32	0
2603340	99	56	50,4	cyclictest	2630221	-21	kworker/u8:1+flush-8:0	07:45:30	1
2603340	99	56	47,7	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	07:20:34	1
2741069	2	55	0,2	chrt	0	-21	swapper/3	09:25:25	3
2603340	99	55	49,4	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:30:23	1
2603340	99	55	48,5	cyclictest	2863827	-21	kworker/u8:2+events_unbound	11:50:37	1
2603340	99	55	48,5	cyclictest	2610653	-21	kworker/u8:3+flush-8:0	07:25:37	1
2603340	99	55	47,6	cyclictest	2644928	-21	kworker/u8:3+events_unbound	09:00:38	1
2603339	99	55	48,5	cyclictest	2764366	-21	kworker/u8:3+events_unbound	10:30:36	0
2603340	99	54	47,5	cyclictest	2789571	-21	kworker/u8:1+flush-8:0	10:50:36	1
2603339	99	54	46,5	cyclictest	2789571	-21	kworker/u8:1+flush-8:0	10:50:20	0
2603339	99	53	46,5	cyclictest	2863827	-21	kworker/u8:2+flush-8:0	11:40:35	0
2603339	99	53	44,6	cyclictest	2923933	-21	latency_hist	12:30:01	0
2603339	99	53	44,6	cyclictest	2904211	-21	apt-get	12:10:19	0
2603345	99	52	45,5	cyclictest	1704890	-21	systemd-journal	09:45:36	2
2603345	99	52	44,6	cyclictest	2764366	-21	kworker/u8:3+flush-8:0	10:30:41	2
2603340	99	52	47,4	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:25:36	1
2603340	99	52	47,3	cyclictest	2834413	-21	kworker/u8:3+flush-8:0	12:25:38	1
2603340	99	52	44,5	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:50:23	1
2603340	99	51	42,7	cyclictest	2729865	-21	cp	09:15:00	1
2603340	99	51	42,7	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	09:20:35	1
2603340	99	51	41,8	cyclictest	2853971	-21	apt-get	11:20:01	1
2603339	99	51	47,3	cyclictest	2804452	-21	kworker/u8:0+events_unbound	11:10:35	0
2603339	99	51	46,4	cyclictest	1264902	-21	kworker/u8:2+events_unbound	09:05:37	0
2603339	99	51	46,3	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:55:34	0
2603339	99	50	46,3	cyclictest	2834413	-21	kworker/u8:3+events_unbound	11:25:19	0
2603339	99	50	45,3	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:20:26	0
2603339	99	50	44,5	cyclictest	2834413	-21	kworker/u8:3+flush-8:0	12:05:33	0
2603339	99	50	44,5	cyclictest	2551647	-21	kworker/u8:0+events_unbound	08:00:38	0
2603339	99	50	44,4	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	09:25:21	0
2603339	99	50	43,4	cyclictest	1264902	-21	kworker/u8:2+events_unbound	08:40:32	0
2603340	99	49	42,5	cyclictest	2759157	-21	kworker/u8:0+flush-8:0	09:50:30	1
2603339	99	49	45,3	cyclictest	2644928	-21	kworker/u8:3+events_unbound	08:30:36	0
2603339	99	49	42,5	cyclictest	2834413	-21	kworker/u8:3+events_unbound	11:30:31	0
2603339	99	49	39,8	cyclictest	2634388	-21	ntpq	07:35:35	0
2603340	99	48	42,4	cyclictest	2610653	-21	kworker/u8:3+flush-8:0	07:30:40	1
2603340	99	48	39,6	cyclictest	2839191	-21	latency_hist	11:05:01	1
2603339	99	48	43,4	cyclictest	2804452	-21	kworker/u8:0+events_unbound	11:05:37	0
2603339	99	48	43,4	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	10:05:36	0
2603339	99	48	41,5	cyclictest	2834413	-21	kworker/u8:3+flush-8:0	11:55:36	0
2603339	99	48	38,7	cyclictest	2833249	-21	ntpq	10:55:31	0
2603340	99	47	34,9	cyclictest	1704890	-21	systemd-journal	09:30:37	1
2603339	99	47	43,3	cyclictest	2834413	-21	kworker/u8:3+events_unbound	11:15:25	0
2603340	99	46	40,4	cyclictest	1264902	-21	kworker/u8:2+events_unbound	10:15:22	1
2603339	99	46	37,7	cyclictest	2645273	-21	latency_hist	07:50:01	0
2603339	99	45	40,4	cyclictest	2863827	-21	kworker/u8:2+events_unbound	11:50:39	0
2603339	99	45	39,5	cyclictest	2863827	-21	kworker/u8:2+flush-8:0	12:00:27	0
2603339	99	45	39,3	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	10:15:34	0
2598784	2	45	7,30	sleep3	0	-21	swapper/3	07:05:24	3
2603345	99	44	38,4	cyclictest	2644928	-21	kworker/u8:3+flush-8:0	08:15:25	2
2603340	99	44	40,3	cyclictest	2551647	-21	kworker/u8:0+events_unbound	07:10:35	1
2603340	99	44	38,4	cyclictest	2748939	-21	kworker/u8:3+events_unbound	09:35:37	1
2603340	99	44	37,5	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	07:35:37	1
2603340	99	44	36,6	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	10:10:35	1
2603339	99	44	38,4	cyclictest	2764366	-21	kworker/u8:3+events_unbound	10:00:32	0
2603339	99	44	38,4	cyclictest	1264902	-21	kworker/u8:2+events_unbound	08:45:34	0
2603339	99	44	37,5	cyclictest	2551647	-21	kworker/u8:0+events_unbound	08:05:34	0
2603339	99	44	32,9	cyclictest	2619461	-21	ntpq	07:20:31	0
2603345	99	43	36,5	cyclictest	2804452	-21	kworker/u8:0+events_unbound	10:55:40	2
2603340	99	43	38,3	cyclictest	2644928	-21	kworker/u8:3+events_unbound	08:15:36	1
2603340	99	43	37,4	cyclictest	2863827	-21	kworker/u8:2+flush-8:0	12:20:38	1
2603340	99	43	35,6	cyclictest	2630221	-21	kworker/u8:1+flush-8:0	07:40:21	1
2603340	99	43	32,9	cyclictest	1704890	-21	systemd-journal	08:15:00	1
2603339	99	43	36,5	cyclictest	2908894	-21	kworker/u8:0+events_unbound	12:30:33	0
2603340	99	42	36,5	cyclictest	2834413	-21	kworker/u8:3+flush-8:0	12:00:37	1
2603340	99	42	34,6	cyclictest	1264902	-21	kworker/u8:2+flush-8:0	08:40:34	1
2603340	99	42	33,7	cyclictest	1264902	-21	kworker/u8:2+events_unbound	09:40:33	1
2603340	99	42	33,7	cyclictest	1264902	-21	kworker/u8:2+events_unbound	09:40:32	1
2603340	99	42	32,7	cyclictest	2784596	-21	latency_hist	10:10:01	1
2603345	99	41	35,5	cyclictest	2644928	-21	kworker/u8:3+events_unbound	08:50:35	2
2603345	99	41	31,8	cyclictest	2914255	-21	cp	12:20:01	2
2603340	99	41	36,4	cyclictest	2804452	-21	kworker/u8:0+flush-8:0	11:10:20	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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