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 Sat Jul 11, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
838850	2	367	0,2	sleep3	45	1	irq_work/3	19:30:12	3
815152	99	80	73,5	cyclictest	794648	-21	kworker/u8:2+events_unbound	19:50:25	1
815148	99	63	57,4	cyclictest	956722	-21	kworker/u8:3+flush-8:0	23:00:18	0
815152	99	61	55,5	cyclictest	956722	-21	kworker/u8:3+events_unbound	22:45:18	1
815152	99	61	55,5	cyclictest	956722	-21	kworker/u8:3+events_unbound	22:45:18	1
815152	99	61	52,7	cyclictest	870932	-21	ntpq	20:00:18	1
815152	99	61	52,7	cyclictest	870932	-21	ntpq	20:00:18	1
815152	99	60	55,4	cyclictest	956722	-21	kworker/u8:3+events_unbound	22:35:17	1
815148	99	60	54,4	cyclictest	950332	-21	kworker/u8:2+flush-8:0	21:25:18	0
815148	99	60	52,5	cyclictest	1704890	-21	systemd-journal	20:35:18	0
815152	99	57	53,2	cyclictest	841697	-21	kworker/u8:1+events_unbound	21:20:17	1
815152	99	57	52,4	cyclictest	1090106	-21	kworker/u8:3+flush-8:0	23:50:18	1
815152	99	57	44,4	cyclictest	916752	-21	kworker/u8:2+flush-8:0	20:55:17	1
815152	99	56	51,4	cyclictest	3650584	-21	kworker/u8:0+events_unbound	19:40:19	1
815148	99	56	50,5	cyclictest	841697	-21	kworker/u8:1+flush-8:0	20:10:19	0
815152	99	55	48,5	cyclictest	841697	-21	kworker/u8:1+flush-8:0	20:40:17	1
815152	99	54	43,9	cyclictest	1704890	-21	systemd-journal	22:55:17	1
815152	99	53	48,3	cyclictest	916752	-21	kworker/u8:2+flush-8:0	21:00:17	1
815148	99	52	47,4	cyclictest	1101738	-21	kworker/u8:2+flush-8:0	23:55:15	0
815148	99	52	46,4	cyclictest	950332	-21	kworker/u8:2+flush-8:0	21:35:21	0
1117659	2	51	0,3	sleep3	75	-21	kworker/3:1+events	00:10:13	3
815152	99	50	45,4	cyclictest	966141	-21	kworker/u8:0+flush-8:0	22:30:21	1
815152	99	50	45,4	cyclictest	956722	-21	kworker/u8:3+flush-8:0	22:50:18	1
815152	99	50	45,4	cyclictest	950332	-21	kworker/u8:2+flush-8:0	23:10:17	1
815152	99	50	45,4	cyclictest	905738	-21	kworker/u8:3+events_unbound	21:10:20	1
815152	99	50	45,4	cyclictest	841697	-21	kworker/u8:1+events_unbound	20:50:19	1
815152	99	50	45,3	cyclictest	950332	-21	kworker/u8:2+flush-8:0	22:05:20	1
815152	99	50	43,5	cyclictest	1134664	-21	kworker/u8:2+flush-8:0	00:30:18	1
815148	99	50	42,6	cyclictest	841697	-21	kworker/u8:1+flush-8:0	19:55:17	0
815152	99	49	43,5	cyclictest	950332	-21	kworker/u8:2+flush-8:0	22:15:22	1
815152	99	49	43,5	cyclictest	882523	-21	kworker/u8:2+flush-8:0	20:30:16	1
815148	99	49	45,3	cyclictest	841697	-21	kworker/u8:1+events_unbound	21:10:09	0
815148	99	49	43,5	cyclictest	966141	-21	kworker/u8:0+flush-8:0	21:55:16	0
815152	99	48	43,3	cyclictest	950332	-21	kworker/u8:2+events_unbound	23:30:16	1
815152	99	47	42,4	cyclictest	465241	-21	kworker/u8:3+events_unbound	19:20:17	1
815152	99	47	41,4	cyclictest	3650584	-21	kworker/u8:0+flush-8:0	19:25:23	1
815152	99	46	42,3	cyclictest	966141	-21	kworker/u8:0+events_unbound	21:55:21	1
815152	99	46	42,3	cyclictest	956722	-21	kworker/u8:3+flush-8:0	22:10:21	1
815152	99	46	40,4	cyclictest	1122978	-21	kworker/u8:1+flush-8:0	00:15:20	1
815148	99	46	42,3	cyclictest	950332	-21	kworker/u8:2+flush-8:0	22:40:23	0
815148	99	46	41,3	cyclictest	950332	-21	kworker/u8:2+events_unbound	22:05:21	0
815148	99	46	40,4	cyclictest	3650584	-21	kworker/u8:0+events_unbound	20:05:17	0
1078345	2	46	0,3	sleep3	75	-21	kworker/3:1+events	23:30:11	3
815152	99	45	41,3	cyclictest	950332	-21	kworker/u8:2+events_unbound	23:15:22	1
815152	99	45	41,3	cyclictest	1090106	-21	kworker/u8:3+events_unbound	00:00:15	1
815152	99	45	40,4	cyclictest	905738	-21	kworker/u8:3+events_unbound	21:15:09	1
815148	99	45	40,3	cyclictest	956722	-21	kworker/u8:3+flush-8:0	22:50:21	0
815148	99	45	40,3	cyclictest	1101738	-21	kworker/u8:2+flush-8:0	00:10:18	0
895157	2	44	0,5	sleep2	0	-21	swapper/2	20:25:13	2
815152	99	44	39,4	cyclictest	950332	-21	kworker/u8:2+events_unbound	21:45:20	1
815152	99	44	39,3	cyclictest	841697	-21	kworker/u8:1+events_unbound	20:45:18	1
815152	99	44	39,3	cyclictest	1122978	-21	kworker/u8:1+events_unbound	00:40:01	1
815148	99	44	39,3	cyclictest	1101738	-21	kworker/u8:2+flush-8:0	00:05:17	0
815148	99	44	38,5	cyclictest	1134664	-21	kworker/u8:2+flush-8:0	00:30:15	0
815148	99	44	37,5	cyclictest	3650584	-21	kworker/u8:0+flush-8:0	19:35:19	0
815153	99	43	26,15	cyclictest	815386	-21	aten2_r5power_v	19:10:04	2
815153	99	43	14,21	cyclictest	0	-21	swapper/2	22:29:59	2
815152	99	43	37,5	cyclictest	950332	-21	kworker/u8:2+flush-8:0	21:50:15	1
815148	99	43	39,2	cyclictest	841697	-21	kworker/u8:1+flush-8:0	21:20:19	0
815148	99	43	38,4	cyclictest	950332	-21	kworker/u8:2+flush-8:0	21:50:17	0
815148	99	43	38,3	cyclictest	1065063	-21	kworker/u8:1+flush-8:0	23:20:21	0
815148	99	43	33,8	cyclictest	1704890	-21	systemd-journal	19:10:16	0
815152	99	42	38,3	cyclictest	841697	-21	kworker/u8:1+flush-8:0	19:45:16	1
815152	99	42	36,4	cyclictest	950332	-21	kworker/u8:2+flush-8:0	22:20:10	1
815152	99	42	35,5	cyclictest	956722	-21	kworker/u8:3+flush-8:0	22:00:17	1
814786	2	42	28,9	sleep1	0	-21	swapper/1	19:07:56	1
815152	99	41	31,4	cyclictest	966141	-21	kworker/u8:0+events_unbound	23:40:18	1
815153	99	40	26,12	cyclictest	1704890	-21	systemd-journal	23:49:17	2
815152	99	40	35,4	cyclictest	465241	-21	kworker/u8:3+flush-8:0	19:30:21	1
815152	99	40	34,4	cyclictest	1101738	-21	kworker/u8:2+flush-8:0	00:05:23	1
815148	99	40	34,4	cyclictest	1090106	-21	kworker/u8:3+flush-8:0	23:50:22	0
815153	99	39	25,12	cyclictest	867174	-21	aten2_r5power_c	20:00:06	2
815153	99	39	25,12	cyclictest	867174	-21	aten2_r5power_c	20:00:05	2
815153	99	39	24,13	cyclictest	877361	-21	fschecks_time	20:10:08	2
815152	99	39	35,2	cyclictest	1105615	-21	munin-run	00:00:00	1
815152	99	39	34,4	cyclictest	966141	-21	kworker/u8:0+events_unbound	21:40:18	1
815152	99	39	34,3	cyclictest	1090106	-21	kworker/u8:3+events_unbound	00:25:19	1
815148	99	39	34,4	cyclictest	950332	-21	kworker/u8:2+flush-8:0	23:10:16	0
815152	99	38	32,5	cyclictest	956722	-21	kworker/u8:3+events_unbound	23:05:20	1
815152	99	38	32,4	cyclictest	882523	-21	kworker/u8:2+events_unbound	20:20:21	1
815152	99	38	30,6	cyclictest	950332	-21	kworker/u8:2+flush-8:0	21:30:23	1
815148	99	38	31,5	cyclictest	851087	-21	ntpq	19:40:18	0
815153	99	37	30,5	cyclictest	1704890	-21	systemd-journal	23:15:00	2
815153	99	37	22,13	cyclictest	1050880	-21	aten2_r5power_c	23:05:06	2
815152	99	37	32,4	cyclictest	1090106	-21	kworker/u8:3+flush-8:0	23:45:24	1
815152	99	37	31,4	cyclictest	891950	-21	apt-get	20:25:02	1
815148	99	37	33,3	cyclictest	950332	-21	kworker/u8:2+events_unbound	23:30:18	0
815148	99	37	32,3	cyclictest	465241	-21	kworker/u8:3+flush-8:0	19:20:18	0
815148	99	37	31,4	cyclictest	1015135	-21	kworker/u8:1+events_unbound	22:25:22	0
815153	99	36	21,13	cyclictest	936573	-21	aten2_r5power_c	21:10:05	2
815153	99	36	16,18	cyclictest	1069538	-21	grep	23:20:15	2
815152	99	36	32,3	cyclictest	794648	-21	kworker/u8:2+flush-8:0	19:35:22	1
815152	99	36	30,5	cyclictest	841697	-21	kworker/u8:1+flush-8:0	21:05:21	1
815152	99	36	29,6	cyclictest	882523	-21	kworker/u8:2+events_unbound	20:35:18	1
815148	99	36	27,6	cyclictest	1125534	-21	latency_hist	00:20:02	0
815153	99	35	8,21	cyclictest	886969	-21	apt-get	20:20:04	2
815152	99	35	31,3	cyclictest	3650584	-21	kworker/u8:0+events_unbound	19:10:25	1
815148	99	35	29,4	cyclictest	882523	-21	kworker/u8:2+flush-8:0	20:20:22	0
815153	99	34	25,7	cyclictest	1704890	-21	systemd-journal	19:49:59	2
815153	99	34	21,11	cyclictest	946944	-21	cpuspeed_turbos	21:20:06	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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