OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rackeslot4s.osadl.org (updated Fri Apr 03, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2451142	99	44	41,2	cyclictest	2616888	-21	kworker/u8:2+flush-259:0	10:50:24	3
2451134	99	44	40,3	cyclictest	252	-21	systemd-journal	09:45:01	1
2451142	99	43	40,2	cyclictest	2616888	-21	kworker/u8:2+events_unbound	10:10:26	3
2451142	99	41	38,2	cyclictest	2684388	-21	kworker/u8:1+events_unbound	10:55:17	3
2451142	99	41	38,2	cyclictest	2663556	-21	kworker/u8:0+events_unbound	11:00:18	3
2451137	99	41	34,5	cyclictest	2710865	-21	diskstats	11:20:14	2
2451134	99	41	36,3	cyclictest	2451332	-21	/usr/sbin/munin	07:10:15	1
2451132	99	41	39,2	cyclictest	2477101	-21	kworker/u8:1+events_unbound	08:25:01	0
2451132	99	41	37,3	cyclictest	2550011	-21	apt-get	08:45:10	0
2451132	99	41	37,3	cyclictest	2550011	-21	apt-get	08:45:09	0
2451142	99	40	37,2	cyclictest	2742386	-21	kworker/u8:1+events_unbound	12:05:18	3
2451142	99	40	37,2	cyclictest	2533834	-21	kworker/u8:2+events_unbound	08:45:19	3
2451142	99	40	37,2	cyclictest	2533834	-21	kworker/u8:2+events_unbound	08:45:18	3
2451142	99	40	36,3	cyclictest	2663556	-21	kworker/u8:0+events_unbound	11:35:14	3
2451142	99	40	33,2	cyclictest	2663556	-21	kworker/u8:0+events_unbound	11:10:24	3
2451132	99	40	36,3	cyclictest	2544828	-21	apt-get	08:40:11	0
2451134	99	39	35,3	cyclictest	2450873	-21	kworker/u8:2+events_unbound	07:35:13	1
2451142	99	38	35,2	cyclictest	2570389	-21	kworker/u8:1+flush-259:0	09:15:16	3
2451132	99	38	34,3	cyclictest	2658658	-21	apt-get	10:30:10	0
2451132	99	38	32,4	cyclictest	2648474	-21	diskstats	10:20:14	0
2451142	99	37	34,2	cyclictest	2684388	-21	kworker/u8:1+flush-259:0	11:40:23	3
2451134	99	37	34,2	cyclictest	2616888	-21	kworker/u8:2+flush-259:0	10:45:17	1
2451137	99	36	31,3	cyclictest	2461396	-21	apt-get	07:20:00	2
2451132	99	36	33,2	cyclictest	2616888	-21	kworker/u8:2+events_unbound	10:45:28	0
2451142	99	35	32,2	cyclictest	2720780	-21	kworker/u8:3+events_unbound	11:45:23	3
2451142	99	35	32,2	cyclictest	2533834	-21	kworker/u8:2+events_unbound	08:30:21	3
2451134	99	35	32,2	cyclictest	2742386	-21	kworker/u8:1+flush-259:0	12:10:24	1
2451134	99	35	32,2	cyclictest	2518475	-21	kworker/u8:0+events_unbound	09:00:13	1
2451142	99	34	31,2	cyclictest	2518475	-21	kworker/u8:0+events_unbound	09:00:18	3
2451142	99	34	31,2	cyclictest	2487456	-21	kworker/u8:3+flush-259:0	08:25:28	3
2451142	99	34	31,2	cyclictest	2487456	-21	kworker/u8:3+events_unbound	08:00:13	3
2451142	99	34	31,2	cyclictest	2487456	-21	kworker/u8:3+events_unbound	07:55:19	3
2451142	99	34	30,3	cyclictest	2632758	-21	kworker/u8:4+flush-259:0	10:25:15	3
2451142	99	34	28,4	cyclictest	2522726	-21	ntpq	08:15:19	3
2451137	99	34	30,3	cyclictest	2477101	-21	kworker/u8:1+flush-259:0	07:50:12	2
2451137	99	34	27,5	cyclictest	252	-21	systemd-journal	09:05:01	2
2451134	99	34	31,2	cyclictest	2684388	-21	kworker/u8:1+events_unbound	11:05:14	1
2451134	99	34	31,2	cyclictest	2616888	-21	kworker/u8:2+flush-259:0	10:05:29	1
2451132	99	34	30,3	cyclictest	2663800	-21	apt-get	10:35:12	0
2451132	99	34	30,3	cyclictest	2477101	-21	kworker/u8:1+events_unbound	07:59:43	0
2451132	99	34	29,4	cyclictest	2451073	-21	latency_hist	07:10:01	0
2451132	99	34	28,4	cyclictest	252	-21	systemd-journal	11:42:43	0
2451142	99	33	31,1	cyclictest	2435420	-21	kworker/u8:1+events_unbound	07:10:21	3
2451142	99	33	30,2	cyclictest	2768175	-21	kworker/u8:3+flush-259:0	12:20:15	3
2451142	99	33	30,2	cyclictest	2757207	-21	kworker/u8:0+events_unbound	12:25:19	3
2451142	99	33	30,2	cyclictest	2663556	-21	kworker/u8:0+events_unbound	11:25:18	3
2451142	99	33	30,2	cyclictest	2616888	-21	kworker/u8:2+flush-259:0	10:05:16	3
2451142	99	33	29,3	cyclictest	2616888	-21	kworker/u8:2+flush-259:0	10:30:17	3
2451137	99	33	30,2	cyclictest	2570389	-21	kworker/u8:1+flush-259:0	09:45:10	2
2451134	99	33	29,3	cyclictest	2699902	-21	/usr/sbin/munin	11:10:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34