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 Dec 26, 2025 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2767031	99	52	48,2	cyclictest	2969822	-21	kworker/u8:1+flush-259:0	10:30:21	2
2767034	99	49	45,3	cyclictest	2850742	-21	kworker/u8:3+events_unbound	08:35:25	3
2767019	99	43	40,2	cyclictest	2777970	-21	kworker/u8:3+flush-259:0	07:35:25	0
2767019	99	43	39,3	cyclictest	2969822	-21	kworker/u8:1+events_unbound	10:35:18	0
2767034	99	42	37,3	cyclictest	252	-21	systemd-journal	08:00:16	3
2767034	99	41	38,2	cyclictest	2876401	-21	kworker/u8:0+events_unbound	09:15:22	3
2767034	99	41	38,2	cyclictest	2876401	-21	kworker/u8:0+events_unbound	09:15:21	3
2767034	99	41	38,2	cyclictest	2809348	-21	kworker/u8:1+flush-259:0	09:00:16	3
2767034	99	41	38,2	cyclictest	2809348	-21	kworker/u8:1+flush-259:0	07:50:24	3
2767034	99	41	38,2	cyclictest	2798809	-21	kworker/u8:0+events_unbound	08:25:23	3
2767031	99	41	38,2	cyclictest	2798809	-21	kworker/u8:0+flush-259:0	07:55:20	2
2767034	99	39	37,1	cyclictest	2751616	-21	kworker/u8:4+events_unbound	07:35:18	3
2767034	99	39	36,2	cyclictest	3053505	-21	kworker/u8:0+events_unbound	11:50:23	3
2767034	99	39	36,2	cyclictest	2850742	-21	kworker/u8:3+flush-259:0	09:40:25	3
2767034	99	39	34,4	cyclictest	2787648	-21	ntpq	07:25:22	3
2767034	99	39	33,4	cyclictest	3053452	-21	cp	11:45:01	3
2767027	99	39	35,3	cyclictest	3001064	-21	kworker/u8:0+flush-259:0	11:30:14	1
2767019	99	39	35,3	cyclictest	2809348	-21	kworker/u8:1+events_unbound	08:50:22	0
2767034	99	38	32,4	cyclictest	2985771	-21	latency_hist	10:40:01	3
2767027	99	38	31,5	cyclictest	2792726	-21	ntpq	07:30:19	1
2767034	99	37	35,2	cyclictest	3047709	-21	kworker/u8:1+events_unbound	12:10:23	3
2767034	99	37	35,2	cyclictest	2949227	-21	kworker/u8:3+events_unbound	10:15:24	3
2767034	99	37	34,2	cyclictest	2850742	-21	kworker/u8:3+events_unbound	08:30:20	3
2767034	99	37	34,2	cyclictest	2798809	-21	kworker/u8:0+events_unbound	08:15:25	3
2767019	99	37	34,2	cyclictest	2809348	-21	kworker/u8:1+flush-259:0	09:50:22	0
2767019	99	37	33,3	cyclictest	2969822	-21	kworker/u8:1+flush-259:0	10:50:19	0
2767034	99	36	33,2	cyclictest	2980260	-21	gpgv	10:35:01	3
2767034	99	36	33,2	cyclictest	2809348	-21	kworker/u8:1+events_unbound	09:20:20	3
2767034	99	36	31,4	cyclictest	3031339	-21	ntpq	11:20:21	3
2767027	99	36	34,1	cyclictest	2751616	-21	kworker/u8:4+flush-259:0	08:05:16	1
2767019	99	36	33,2	cyclictest	2850742	-21	kworker/u8:3+events_unbound	09:30:19	0
2767019	99	36	33,2	cyclictest	2708392	-21	kworker/u8:1+flush-259:0	07:15:23	0
2767019	99	36	32,3	cyclictest	2809348	-21	kworker/u8:1+events_unbound	09:25:23	0
2767034	99	35	32,2	cyclictest	2850742	-21	kworker/u8:3+flush-259:0	09:10:21	3
2767034	99	35	23,7	cyclictest	2876401	-21	kworker/u8:0+events_unbound	08:59:59	3
2767031	99	35	32,2	cyclictest	2809348	-21	kworker/u8:1+events_unbound	10:05:21	2
2767031	99	35	31,3	cyclictest	2798809	-21	kworker/u8:0+flush-259:0	08:15:24	2
2767019	99	35	32,2	cyclictest	2798809	-21	kworker/u8:0+flush-259:0	08:05:20	0
2767034	99	34	31,2	cyclictest	3001064	-21	kworker/u8:0+events_unbound	11:05:20	3
2767027	99	34	28,5	cyclictest	2896938	-21	latency_hist	09:15:01	1
2767019	99	34	32,2	cyclictest	3037600	-21	kworker/u8:2+flush-259:0	11:30:20	0
2767019	99	34	0,33	cyclictest	1	-21	systemd	10:00:00	0
2767034	99	33	29,3	cyclictest	3079111	-21	kworker/u8:0+events_unbound	12:20:17	3
2767031	99	33	30,2	cyclictest	2708392	-21	kworker/u8:1+flush-259:0	07:15:17	2
2767031	99	33	29,3	cyclictest	2850742	-21	kworker/u8:3+flush-259:0	09:45:16	2
2767027	99	33	30,2	cyclictest	2798809	-21	kworker/u8:0+flush-259:0	08:10:21	1
2767027	99	33	29,3	cyclictest	3089468	-21	kworker/u8:3+flush-259:0	12:35:22	1
2767019	99	33	30,2	cyclictest	2850742	-21	kworker/u8:3+flush-259:0	09:45:21	0
2767019	99	33	30,2	cyclictest	2798809	-21	kworker/u8:0+events_unbound	07:40:19	0
2767019	99	33	29,3	cyclictest	3026796	-21	kworker/u8:3+events_unbound	11:45:07	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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