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 Wed May 20, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3509900	2	323	0,5	sleep3	45	1	irq_work/3	22:26:06	3
3309787	99	73	53,18	cyclictest	3425413	-21	cp	21:05:01	2
3309783	99	59	51,6	cyclictest	3514852	-21	kworker/u8:2+flush-8:0	22:50:59	1
3309781	99	59	51,6	cyclictest	3499840	-21	kworker/u8:1+flush-8:0	23:01:04	0
3309783	99	55	51,3	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	20:16:07	1
3309783	99	55	47,6	cyclictest	3621050	-21	/usr/sbin/munin	00:21:03	1
3309783	99	54	48,5	cyclictest	3322186	-21	kworker/u8:3+flush-8:0	21:20:52	1
3309783	99	54	48,5	cyclictest	3322186	-21	kworker/u8:3+events_unbound	20:06:05	1
3309783	99	53	48,4	cyclictest	3575104	-21	kworker/u8:1+events_unbound	00:15:01	1
3309783	99	53	44,6	cyclictest	3356439	-21	/usr/sbin/munin	19:56:05	1
3309781	99	53	47,4	cyclictest	3430193	-21	kworker/u8:1+events_unbound	21:51:06	0
3309783	99	52	46,4	cyclictest	3322186	-21	kworker/u8:3+flush-8:0	21:26:03	1
3309783	99	51	47,3	cyclictest	3322186	-21	kworker/u8:3+events_unbound	20:21:05	1
3309781	99	51	46,3	cyclictest	3399947	-21	kworker/u8:2+events_unbound	21:01:05	0
3309781	99	51	45,5	cyclictest	3454446	-21	kworker/u8:2+flush-8:0	22:01:04	0
3309783	99	50	46,3	cyclictest	3399947	-21	kworker/u8:2+events_unbound	20:36:06	1
3309783	99	50	45,4	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	19:26:03	1
3309783	99	50	45,3	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	20:51:03	1
3309783	99	50	44,5	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	21:10:52	1
3309781	99	50	45,3	cyclictest	3492973	-21	kworker/u8:3+events_unbound	00:31:04	0
3309781	99	50	45,3	cyclictest	3440130	-21	kworker/u8:0+flush-8:0	22:25:52	0
3309783	99	49	45,3	cyclictest	3575104	-21	kworker/u8:1+events_unbound	23:50:50	1
3309783	99	49	44,4	cyclictest	3454446	-21	kworker/u8:2+events_unbound	21:45:50	1
3309783	99	49	44,3	cyclictest	3514852	-21	kworker/u8:2+events_unbound	22:36:02	1
3309783	99	49	43,4	cyclictest	3492973	-21	kworker/u8:3+flush-8:0	00:06:02	1
3309781	99	49	45,3	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	20:31:05	0
3309781	99	49	44,4	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	20:46:03	0
3309781	99	49	42,5	cyclictest	3492973	-21	kworker/u8:3+events_unbound	00:26:05	0
3309783	99	48	44,3	cyclictest	3575104	-21	kworker/u8:1+events_unbound	00:16:04	1
3309783	99	48	43,4	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	21:16:05	1
3309783	99	48	43,4	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	19:31:04	1
3309781	99	48	44,3	cyclictest	3499840	-21	kworker/u8:1+events_unbound	23:06:01	0
3309781	99	48	43,4	cyclictest	3430193	-21	kworker/u8:1+flush-8:0	21:55:52	0
3309781	99	48	39,7	cyclictest	3515163	-21	latency_hist	22:35:01	0
3309781	99	48	35,11	cyclictest	3322186	-21	kworker/u8:3+flush-8:0	21:30:59	0
3309781	99	48	35,11	cyclictest	3322186	-21	kworker/u8:3+flush-8:0	21:30:58	0
3309783	99	47	43,3	cyclictest	3492973	-21	kworker/u8:3+flush-8:0	22:55:48	1
3309783	99	47	43,3	cyclictest	3430193	-21	kworker/u8:1+flush-8:0	21:30:48	1
3309783	99	47	43,3	cyclictest	3430193	-21	kworker/u8:1+flush-8:0	21:30:48	1
3309783	99	47	42,4	cyclictest	3499840	-21	kworker/u8:1+flush-8:0	23:05:58	1
3309783	99	47	42,4	cyclictest	3492973	-21	kworker/u8:3+flush-8:0	23:10:58	1
3309783	99	47	41,5	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	21:00:52	1
3309783	99	47	41,5	cyclictest	1948685	-21	kworker/u8:0+flush-8:0	19:16:05	1
3309781	99	47	43,3	cyclictest	3575104	-21	kworker/u8:1+flush-8:0	00:36:04	0
3309781	99	47	43,3	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	20:41:05	0
3309781	99	47	42,4	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:10:50	0
3309781	99	47	42,3	cyclictest	3399947	-21	kworker/u8:2+events_unbound	21:15:01	0
3309781	99	47	37,8	cyclictest	3445689	-21	/usr/sbin/munin	21:25:58	0
3450411	2	46	0,1	chrt	3450415	-21	latency_hist	21:30:00	2
3309783	99	46	42,3	cyclictest	3492973	-21	kworker/u8:3+flush-8:0	22:15:51	1
3309783	99	46	42,3	cyclictest	2477739	-21	kworker/u8:1+events_unbound	19:51:02	1
3309783	99	46	42,3	cyclictest	2477739	-21	kworker/u8:1+events_unbound	19:51:02	1
3309783	99	46	42,3	cyclictest	1948685	-21	kworker/u8:0+events_unbound	20:31:02	1
3309783	99	46	41,4	cyclictest	3499840	-21	kworker/u8:1+flush-8:0	23:00:50	1
3309783	99	46	41,4	cyclictest	3492973	-21	kworker/u8:3+flush-8:0	00:00:59	1
3309783	99	46	41,4	cyclictest	3322186	-21	kworker/u8:3+events_unbound	20:41:00	1
3309783	99	46	41,3	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:25:52	1
3309783	99	46	40,4	cyclictest	3430193	-21	kworker/u8:1+flush-8:0	22:06:04	1
3309781	99	46	42,3	cyclictest	3499840	-21	kworker/u8:1+flush-8:0	22:41:05	0
3309781	99	46	41,3	cyclictest	3454446	-21	kworker/u8:2+flush-8:0	21:36:01	0
3309781	99	46	39,5	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	19:51:01	0
3309781	99	46	39,5	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	19:51:00	0
3309783	99	45	40,4	cyclictest	3584860	-21	kworker/u8:2+flush-8:0	23:45:59	1
3309783	99	45	40,3	cyclictest	3454446	-21	kworker/u8:2+events_unbound	21:40:53	1
3309783	99	45	35,4	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:21:09	1
3309783	99	45	35,4	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:21:08	1
3309781	99	45	40,4	cyclictest	2477739	-21	kworker/u8:1+events_unbound	20:16:05	0
3309781	99	45	38,5	cyclictest	3575104	-21	kworker/u8:1+flush-8:0	23:41:00	0
3309781	99	45	36,7	cyclictest	1704890	-21	systemd-journal	23:40:00	0
3309783	99	44	39,4	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:16:00	1
3309783	99	44	39,4	cyclictest	3399947	-21	kworker/u8:2+events_unbound	21:05:50	1
3309783	99	44	38,4	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	19:45:59	1
3309781	99	44	40,3	cyclictest	3549995	-21	kworker/u8:2+events_unbound	23:20:52	0
3309781	99	44	40,3	cyclictest	3549995	-21	kworker/u8:2+events_unbound	23:20:52	0
3309781	99	44	39,4	cyclictest	3575104	-21	kworker/u8:1+events_unbound	23:50:51	0
3309781	99	44	0,42	cyclictest	1	-21	systemd	00:00:01	0
3309783	99	43	39,3	cyclictest	3454446	-21	kworker/u8:2+events_unbound	22:00:01	1
3309783	99	43	34,6	cyclictest	3313814	-21	ntpq	19:11:01	1
3309781	99	43	39,3	cyclictest	3454446	-21	kworker/u8:2+events_unbound	21:45:52	0
3309781	99	43	37,4	cyclictest	3514852	-21	kworker/u8:2+events_unbound	22:56:06	0
3309783	99	42	38,3	cyclictest	3440130	-21	kworker/u8:0+events_unbound	22:25:00	1
3309783	99	42	37,4	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:31:00	1
3309783	99	42	37,4	cyclictest	3499840	-21	kworker/u8:1+flush-8:0	22:45:54	1
3309783	99	42	37,4	cyclictest	3322186	-21	kworker/u8:3+flush-8:0	20:56:00	1
3309783	99	42	37,3	cyclictest	3440130	-21	kworker/u8:0+flush-8:0	21:50:52	1
3309783	99	42	36,5	cyclictest	1948685	-21	kworker/u8:0+events_unbound	19:20:49	1
3309783	99	42	35,5	cyclictest	3440130	-21	kworker/u8:0+events_unbound	22:31:03	1
3309781	99	42	38,3	cyclictest	1948685	-21	kworker/u8:0+events_unbound	20:36:01	0
3309781	99	42	37,4	cyclictest	3430193	-21	kworker/u8:1+flush-8:0	22:06:01	0
3309787	99	41	30,8	cyclictest	3475939	-21	diskstats	21:55:51	2
3309783	99	41	37,3	cyclictest	3322186	-21	kworker/u8:3+events_unbound	20:10:51	1
3309783	99	41	36,4	cyclictest	3492973	-21	kworker/u8:3+flush-8:0	00:30:51	1
3309781	99	41	36,4	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	21:06:00	0
3309781	99	41	35,4	cyclictest	3549995	-21	kworker/u8:2+flush-8:0	23:30:51	0
3309781	99	41	34,5	cyclictest	3399947	-21	kworker/u8:2+flush-8:0	20:51:01	0
3309783	99	40	34,4	cyclictest	3575104	-21	kworker/u8:1+flush-8:0	23:35:49	1
3309781	99	40	36,2	cyclictest	3492973	-21	kworker/u8:3+events_unbound	22:50:00	0
3309781	99	40	35,4	cyclictest	3360286	-21	ntpq	19:56:03	0
3309781	99	40	34,4	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	19:30:59	0
3309783	99	39	34,4	cyclictest	2477739	-21	kworker/u8:1+flush-8:0	20:01:04	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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