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 Fri May 01, 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
714728	2	194	0,3	sleep3	75	-21	kworker/3:1-events	07:46:17	3
673123	2	63	0,7	chrt	29	1	ktimers/1	07:06:18	1
673960	99	62	55,5	cyclictest	809701	-21	kworker/u8:3+events_unbound	11:21:18	1
673960	99	61	54,5	cyclictest	673823	-21	kworker/u8:1+flush-8:0	07:16:20	1
673960	99	60	53,4	cyclictest	948308	-21	kworker/u8:2+flush-8:0	11:46:03	1
673960	99	60	52,6	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:11:20	1
673960	99	59	54,4	cyclictest	809701	-21	kworker/u8:3+events_unbound	09:26:02	1
673960	99	59	52,5	cyclictest	884808	-21	kworker/u8:1+flush-8:0	11:26:03	1
673960	99	59	52,5	cyclictest	685357	-21	kworker/u8:0+flush-8:0	10:26:15	1
673960	99	59	50,5	cyclictest	809701	-21	kworker/u8:3+flush-8:0	09:46:14	1
673958	99	59	49,7	cyclictest	978978	-21	latency_hist	12:15:01	0
673960	99	58	52,4	cyclictest	685357	-21	kworker/u8:0+events_unbound	07:56:15	1
673960	99	58	52,4	cyclictest	616888	-21	kworker/u8:3+flush-8:0	07:31:14	1
673960	99	58	51,5	cyclictest	685357	-21	kworker/u8:0+flush-8:0	08:51:19	1
673958	99	56	45,8	cyclictest	685357	-21	kworker/u8:0+flush-8:0	07:21:15	0
673964	99	54	47,5	cyclictest	909285	-21	apt-get	11:05:01	2
673960	99	54	48,5	cyclictest	809701	-21	kworker/u8:3+events_unbound	10:11:04	1
673960	99	54	48,4	cyclictest	685357	-21	kworker/u8:0+flush-8:0	08:16:13	1
673960	99	54	48,4	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	09:21:14	1
673960	99	54	47,5	cyclictest	685357	-21	kworker/u8:0+flush-8:0	09:31:17	1
673960	99	54	46,6	cyclictest	948308	-21	kworker/u8:2+flush-8:0	12:26:12	1
673964	99	53	42,8	cyclictest	280	-21	systemd-journal	09:20:01	2
673960	99	53	46,5	cyclictest	809701	-21	kworker/u8:3+events_unbound	10:51:05	1
673958	99	53	45,5	cyclictest	919308	-21	base64	11:15:01	0
673960	99	52	48,3	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:01:12	1
673960	99	52	47,3	cyclictest	884808	-21	kworker/u8:1+events_unbound	11:16:16	1
673960	99	52	47,3	cyclictest	809701	-21	kworker/u8:3+events_unbound	09:51:14	1
673960	99	52	45,5	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:21:15	1
777273	2	51	0,2	sleep3	75	-21	kworker/3:1+events	08:51:10	3
673960	99	51	46,2	cyclictest	685357	-21	kworker/u8:0+events_unbound	10:06:03	1
673960	99	51	45,4	cyclictest	3518702	-21	kworker/u8:2+events_unbound	07:11:15	1
673960	99	51	43,6	cyclictest	849290	-21	kworker/u8:2+events_unbound	10:31:17	1
673958	99	51	45,4	cyclictest	884808	-21	kworker/u8:1+flush-8:0	10:46:14	0
673958	99	51	45,4	cyclictest	884808	-21	kworker/u8:1+flush-8:0	10:46:13	0
673964	99	50	39,8	cyclictest	838842	-21	ntpq	09:51:14	2
673960	99	50	46,3	cyclictest	884808	-21	kworker/u8:1+flush-8:0	10:56:12	1
673960	99	50	43,5	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:35:01	1
673960	99	50	43,5	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:35:01	1
673958	99	50	43,5	cyclictest	948308	-21	kworker/u8:2+flush-8:0	12:26:14	0
673960	99	49	44,3	cyclictest	884808	-21	kworker/u8:1+flush-8:0	12:11:20	1
673960	99	49	43,4	cyclictest	685357	-21	kworker/u8:0+events_unbound	09:36:04	1
673960	99	49	42,5	cyclictest	948308	-21	kworker/u8:2+events_unbound	11:51:18	1
673960	99	49	42,5	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:36:15	1
673960	99	48	43,4	cyclictest	725546	-21	kworker/u8:1+events_unbound	08:41:03	1
673960	99	48	42,5	cyclictest	725546	-21	kworker/u8:1+events_unbound	09:01:16	1
673960	99	48	42,4	cyclictest	994054	-21	kworker/u8:0+events_unbound	12:35:02	1
673960	99	48	42,4	cyclictest	725546	-21	kworker/u8:1+flush-8:0	09:41:05	1
673958	99	48	41,5	cyclictest	948308	-21	kworker/u8:2+flush-8:0	11:51:12	0
673958	99	48	41,5	cyclictest	849585	-21	http	10:05:01	0
673960	99	47	41,5	cyclictest	3518702	-21	kworker/u8:2+events_unbound	08:06:16	1
673960	99	47	41,4	cyclictest	884808	-21	kworker/u8:1+flush-8:0	11:06:07	1
673960	99	47	40,5	cyclictest	884808	-21	kworker/u8:1+flush-8:0	11:36:18	1
673960	99	47	40,5	cyclictest	809701	-21	kworker/u8:3+events_unbound	11:11:15	1
673958	99	47	38,6	cyclictest	705480	-21	latency_hist	07:40:01	0
673958	99	46	39,5	cyclictest	923545	-21	ntpq	11:16:13	0
673960	99	45	39,4	cyclictest	685357	-21	kworker/u8:0+events_unbound	07:41:14	1
846848	2	44	0,2	sleep3	48	1	ktimers/3	10:01:08	3
673960	99	44	39,4	cyclictest	969082	-21	kworker/u8:3+flush-8:0	12:31:20	1
673960	99	44	38,5	cyclictest	884808	-21	kworker/u8:1+events_unbound	11:31:13	1
673960	99	44	38,4	cyclictest	849290	-21	kworker/u8:2+flush-8:0	10:36:10	1
673958	99	44	37,4	cyclictest	984154	-21	latency_hist	12:20:01	0
673960	99	43	33,7	cyclictest	849565	-21	latency_hist	10:05:01	1
673960	99	42	36,4	cyclictest	948308	-21	kworker/u8:2+flush-8:0	12:21:04	1
673960	99	42	36,4	cyclictest	805014	-21	latency_hist	09:20:00	1
673960	99	42	35,5	cyclictest	685357	-21	kworker/u8:0+flush-8:0	07:21:09	1
673960	99	40	34,4	cyclictest	725546	-21	kworker/u8:1+events_unbound	09:06:17	1
673960	99	40	33,5	cyclictest	884808	-21	kworker/u8:1+events_unbound	12:16:03	1
673964	99	39	28,8	cyclictest	780883	-21	diskstats	08:56:04	2
673960	99	39	33,4	cyclictest	616888	-21	kworker/u8:3+flush-8:0	07:36:19	1
673960	99	38	33,4	cyclictest	884808	-21	kworker/u8:1+flush-8:0	10:46:13	1
673960	99	38	33,4	cyclictest	884808	-21	kworker/u8:1+flush-8:0	10:46:13	1
673960	99	38	29,7	cyclictest	963024	-21	ntpq	11:56:12	1
673964	99	37	8,13	cyclictest	883863	2	tr	10:36:16	2
673964	99	37	31,4	cyclictest	280	-21	systemd-journal	12:05:00	2
673960	99	37	33,3	cyclictest	685357	-21	kworker/u8:0+flush-8:0	08:56:21	1
673960	99	37	32,3	cyclictest	809701	-21	kworker/u8:3+flush-8:0	10:16:15	1
673958	99	37	31,4	cyclictest	884808	-21	kworker/u8:1+flush-8:0	12:21:19	0
673958	99	37	29,6	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	08:21:06	0
673960	99	36	32,3	cyclictest	969082	-21	kworker/u8:3+flush-8:0	12:06:18	1
673960	99	36	30,4	cyclictest	840026	-21	apt-get	09:55:58	1
673958	99	36	25,9	cyclictest	799207	-21	ntpq	09:11:14	0
673964	99	35	27,5	cyclictest	280	-21	systemd-journal	10:20:00	2
673964	99	35	20,9	cyclictest	686780	-21	ps	07:21:09	2
673964	99	35	18,10	cyclictest	979532	-21	apt-get	12:16:02	2
673960	99	35	31,3	cyclictest	3518702	-21	kworker/u8:2+flush-8:0	09:11:06	1
673960	99	35	30,4	cyclictest	616888	-21	kworker/u8:3+flush-8:0	07:26:16	1
673958	99	35	30,4	cyclictest	3518702	-21	kworker/u8:2+events_unbound	08:36:18	0
673958	99	35	30,3	cyclictest	809701	-21	kworker/u8:3+flush-8:0	09:51:04	0
673958	99	35	28,5	cyclictest	969152	-21	/usr/sbin/munin	12:06:19	0
673958	99	35	27,6	cyclictest	280	-21	systemd-journal	11:25:01	0
673964	99	34	19,9	cyclictest	725853	-21	apt-get	08:00:59	2
673964	99	34	19,9	cyclictest	695926	-21	apt-get	07:31:02	2
673958	99	34	30,3	cyclictest	685357	-21	kworker/u8:0+flush-8:0	07:56:22	0
673964	99	33	23,8	cyclictest	938520	-21	anacron	11:31:18	2
673964	99	33	10,21	cyclictest	924393	-21	munin-plugin-st	11:20:01	2
673960	99	33	29,3	cyclictest	685357	-21	kworker/u8:0+events_unbound	08:46:08	1
673960	99	33	28,3	cyclictest	3518702	-21	kworker/u8:2+events_unbound	08:26:11	1
673960	99	33	26,5	cyclictest	908379	-21	ntpq	11:01:12	1
673958	99	33	26,5	cyclictest	834350	-21	grep	09:46:19	0
673964	99	32	22,4	cyclictest	998995	-21	apt-get	12:35:03	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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