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 05, 2025 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4076579	99	44	41,2	cyclictest	211481	-21	kworker/u8:1+events_unbound	00:35:18	0
4076579	99	41	38,2	cyclictest	21	1	rcuc/0	00:10:00	0
4076585	99	40	34,4	cyclictest	132934	-21	latency_hist	23:10:00	2
4076579	99	39	35,3	cyclictest	91048	-21	kworker/u8:1+events_unbound	22:45:23	0
4076579	99	38	34,3	cyclictest	4134102	-21	kworker/u8:1+events_unbound	21:40:15	0
4076579	99	38	34,3	cyclictest	4124007	-21	kworker/u8:4+flush-259:0	20:30:32	0
4076579	99	37	34,2	cyclictest	4077031	-21	kworker/u8:4+flush-259:0	19:45:25	0
4076579	99	37	30,5	cyclictest	2698871	-21	systemd-journal	22:15:01	0
4076579	99	36	32,3	cyclictest	4124007	-21	kworker/u8:4+flush-259:0	20:25:25	0
4076590	99	35	28,5	cyclictest	2698871	-21	systemd-journal	21:10:00	3
4076585	99	35	29,4	cyclictest	138663	-21	base64	23:15:01	2
4076590	99	33	29,3	cyclictest	49496	-21	kworker/u8:3+flush-259:0	22:05:00	3
4076585	99	33	26,6	cyclictest	91048	-21	kworker/u8:1+flush-259:0	22:50:01	2
4076579	99	33	30,2	cyclictest	4134102	-21	kworker/u8:1+events_unbound	21:10:14	0
4076579	99	33	29,3	cyclictest	196290	-21	kworker/u8:0+flush-259:0	00:25:29	0
4076590	99	32	29,2	cyclictest	211481	-21	kworker/u8:1+flush-259:0	00:40:00	3
4076581	99	32	28,3	cyclictest	143667	-21	latency_hist	23:19:59	1
4076579	99	32	29,2	cyclictest	4124007	-21	kworker/u8:4+events_unbound	19:55:26	0
4076579	99	32	28,3	cyclictest	80258	-21	kworker/u8:0+events_unbound	22:20:16	0
4076590	99	31	28,2	cyclictest	4113159	-21	gpgv	19:45:00	3
4076579	99	31	28,2	cyclictest	4118134	-21	kworker/u8:2+events_unbound	20:05:26	0
4076590	99	30	27,2	cyclictest	24986	-21	kworker/u8:3+flush-259:0	21:34:59	3
4076585	99	30	26,3	cyclictest	4186323	-21	kworker/u8:2+flush-259:0	21:20:00	2
4076581	99	29	26,2	cyclictest	24986	-21	kworker/u8:3+flush-259:0	21:30:32	1
4076581	99	29	25,3	cyclictest	185194	-21	latency_hist	00:00:01	1
4076581	99	29	24,4	cyclictest	4143475	-21	ntpq	20:10:24	1
4076581	99	29	22,5	cyclictest	226890	-21	latency_hist	00:40:01	1
4076579	99	29	27,2	cyclictest	38539	-21	kworker/u8:0+flush-259:0	21:50:15	0
4076579	99	29	26,2	cyclictest	4134102	-21	kworker/u8:1+events_unbound	21:30:31	0
4076579	99	29	26,2	cyclictest	24986	-21	kworker/u8:3+events_unbound	21:35:12	0
4076579	99	29	26,2	cyclictest	106959	-21	kworker/u8:2+flush-259:0	23:25:19	0
4076579	99	28	26,2	cyclictest	91048	-21	kworker/u8:1+events_unbound	23:00:23	0
4076579	99	28	25,2	cyclictest	80747	-21	kworker/u8:3+events_unbound	22:40:24	0
4076579	99	28	25,2	cyclictest	70404	-21	kworker/u8:2+flush-259:0	22:15:23	0
4076579	99	28	25,2	cyclictest	4134102	-21	kworker/u8:1+flush-259:0	20:55:20	0
4076579	99	28	25,2	cyclictest	4134102	-21	kworker/u8:1+events_unbound	20:50:18	0
4076579	99	28	24,3	cyclictest	4134102	-21	kworker/u8:1+events_unbound	20:10:18	0
4076590	99	27	24,2	cyclictest	106959	-21	kworker/u8:2+events_unbound	22:50:25	3
4076579	99	27	24,2	cyclictest	91048	-21	kworker/u8:1+events_unbound	22:35:23	0
4076579	99	27	24,2	cyclictest	4124007	-21	kworker/u8:4+flush-259:0	20:40:29	0
4076579	99	27	23,3	cyclictest	4124007	-21	kworker/u8:4+events_unbound	20:15:20	0
4076579	99	27	20,5	cyclictest	4081986	-21	latency_hist	19:15:01	0
4076590	99	26	21,3	cyclictest	4124007	-21	kworker/u8:4+flush-259:0	20:35:17	3
4076581	99	26	23,2	cyclictest	4124007	-21	kworker/u8:4+flush-259:0	19:55:26	1
4076581	99	26	22,3	cyclictest	4160393	-21	/usr/sbin/munin	20:30:21	1
4076581	99	26	19,5	cyclictest	127796	-21	latency_hist	23:04:59	1
4076579	99	26	23,2	cyclictest	4134102	-21	kworker/u8:1+events_unbound	20:20:25	0
4076579	99	26	23,2	cyclictest	221064	-21	kworker/u8:3+events_unbound	00:31:28	0
4076579	99	26	22,3	cyclictest	180271	-21	kworker/u8:2+events_unbound	00:15:21	0
4076579	99	26	21,4	cyclictest	163308	-21	ntpq	23:35:22	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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