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
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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 50 highest latencies:

System rack5slot4s.osadl.org (updated Wed Jul 08, 2026 00:44:16)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1465036	2	186	0,2	sleep3	0	-21	swapper/3	20:35:13	3
1668650	2	64	0,3	sleep3	75	-21	kworker/3:1-events	00:00:05	3
1377008	99	58	52,4	cyclictest	1423993	-21	kworker/u8:3+events_unbound	20:55:18	2
1377004	99	58	52,4	cyclictest	1593614	-21	kworker/u8:0+events_unbound	23:15:27	1
1377004	99	57	52,3	cyclictest	1433530	-21	kworker/u8:1+events_unbound	21:05:25	1
1377000	99	57	51,4	cyclictest	1433530	-21	kworker/u8:1+events_unbound	21:55:26	0
1377008	99	56	50,4	cyclictest	1533022	-21	kworker/u8:0+flush-8:0	22:05:27	2
1377008	99	56	50,4	cyclictest	1463931	-21	kworker/u8:0+flush-8:0	21:20:26	2
1428522	2	55	0,3	sleep0	1428527	-21	unixbench_singl	19:55:29	0
1377004	99	55	49,5	cyclictest	1533022	-21	kworker/u8:0+events_unbound	22:10:20	1
1377004	99	55	49,4	cyclictest	1387861	-21	kworker/u8:0+events_unbound	19:55:28	1
1377008	99	54	50,3	cyclictest	1230476	-21	kworker/u8:4+flush-8:0	19:20:00	2
1377004	99	54	47,5	cyclictest	1663203	-21	kworker/u8:3+flush-8:0	00:30:27	1
1377004	99	54	47,5	cyclictest	1663203	-21	kworker/u8:3+flush-8:0	00:30:26	1
1377004	99	54	44,8	cyclictest	1578737	-21	apt-get	22:30:00	1
1377000	99	54	49,3	cyclictest	1518119	-21	kworker/u8:3+events_unbound	21:30:24	0
1377008	99	53	45,5	cyclictest	1704890	-21	systemd-journal	22:45:01	2
1377004	99	53	48,4	cyclictest	1613356	-21	kworker/u8:1+flush-8:0	23:10:26	1
1377004	99	53	47,4	cyclictest	1577824	-21	kworker/u8:2+events_unbound	23:20:23	1
1377000	99	53	47,4	cyclictest	1577824	-21	kworker/u8:2+flush-8:0	23:05:26	0
1377004	99	52	46,4	cyclictest	1579509	-21	kworker/u8:4+flush-8:0	22:55:22	1
1377000	99	52	48,3	cyclictest	1423993	-21	kworker/u8:3+flush-8:0	20:15:27	0
1377004	99	51	46,4	cyclictest	1433530	-21	kworker/u8:1+events_unbound	20:50:00	1
1377008	99	50	45,3	cyclictest	1593614	-21	kworker/u8:0+flush-8:0	22:50:11	2
1377004	99	50	46,3	cyclictest	1387861	-21	kworker/u8:0+flush-8:0	20:00:31	1
1377004	99	50	44,4	cyclictest	1640810	-21	kworker/u8:3+events_unbound	23:30:23	1
1377004	99	49	45,3	cyclictest	1433530	-21	kworker/u8:1+events_unbound	22:00:21	1
1377004	99	49	44,3	cyclictest	1518119	-21	kworker/u8:3+events_unbound	21:35:09	1
1377004	99	49	39,8	cyclictest	1704890	-21	systemd-journal	21:40:02	1
1377000	99	49	41,6	cyclictest	1579509	-21	kworker/u8:4+flush-8:0	22:50:22	0
1377008	99	48	44,3	cyclictest	1640810	-21	kworker/u8:3+events_unbound	23:30:22	2
1377008	99	48	42,4	cyclictest	1577824	-21	kworker/u8:2+events_unbound	22:35:22	2
1377004	99	48	42,4	cyclictest	1552872	-21	kworker/u8:3+flush-8:0	22:15:21	1
1377008	99	47	42,4	cyclictest	1423993	-21	kworker/u8:3+flush-8:0	20:15:21	2
1377004	99	46	41,3	cyclictest	1433530	-21	kworker/u8:1+events_unbound	20:30:20	1
1377004	99	46	41,3	cyclictest	1423993	-21	kworker/u8:3+events_unbound	20:25:20	1
1377004	99	46	40,4	cyclictest	1230476	-21	kworker/u8:4+events_unbound	19:20:22	1
1377004	99	46	38,6	cyclictest	1577824	-21	kworker/u8:2+flush-8:0	23:25:20	1
1377000	99	46	41,3	cyclictest	1577824	-21	kworker/u8:2+flush-8:0	23:20:27	0
1377000	99	46	40,5	cyclictest	1552872	-21	kworker/u8:3+events_unbound	22:15:22	0
1377008	99	45	40,4	cyclictest	1433530	-21	kworker/u8:1+events_unbound	21:30:21	2
1377004	99	45	40,3	cyclictest	1433530	-21	kworker/u8:1+flush-8:0	20:50:21	1
1377004	99	45	39,5	cyclictest	1552872	-21	kworker/u8:3+flush-8:0	22:30:22	1
1377004	99	45	39,4	cyclictest	1230476	-21	kworker/u8:4+events_unbound	19:40:25	1
1377004	99	45	38,5	cyclictest	1577824	-21	kworker/u8:2+flush-8:0	22:40:20	1
1377000	99	45	40,3	cyclictest	1433530	-21	kworker/u8:1+flush-8:0	22:00:26	0
1377000	99	45	39,4	cyclictest	1398953	-21	kworker/u8:2+flush-8:0	20:25:40	0
1377008	99	44	40,3	cyclictest	1577824	-21	kworker/u8:2+events_unbound	22:25:23	2
1377008	99	44	39,4	cyclictest	1672495	-21	kworker/u8:4+flush-8:0	00:15:21	2
1377008	99	44	39,4	cyclictest	1398953	-21	kworker/u8:2+flush-8:0	20:10:21	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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