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 Tue Mar 24, 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
4170084	99	50	47,3	cyclictest	235147	-21	kworker/u8:3+events_unbound	12:30:15	0
4170084	99	47	44,2	cyclictest	95355	-21	kworker/u8:3+events_unbound	10:00:14	0
4170092	99	46	41,3	cyclictest	85318	-21	/usr/sbin/munin	08:55:15	2
4170084	99	42	38,3	cyclictest	75	-21	kswapd0	12:25:02	0
4170084	99	40	38,2	cyclictest	1146027	-21	kworker/u8:2+events_unbound	07:20:26	0
4170084	99	40	37,2	cyclictest	4185474	-21	kworker/u8:0+events_unbound	07:45:16	0
4170088	99	39	35,3	cyclictest	100495	-21	kworker/u8:4+flush-259:0	11:25:18	1
4170084	99	39	36,2	cyclictest	1146027	-21	kworker/u8:2+events_unbound	07:55:14	0
4170084	99	38	35,2	cyclictest	48338	-21	kworker/u8:1+events_unbound	08:20:24	0
4170084	99	38	34,3	cyclictest	100495	-21	kworker/u8:4+events_unbound	11:25:20	0
4170084	99	38	34,2	cyclictest	245251	-21	kworker/u8:1+events_unbound	11:35:25	0
4170092	99	37	35,1	cyclictest	250279	-21	fwupd	11:34:26	2
4170092	99	37	35,1	cyclictest	250279	-21	fwupd	11:34:25	2
4170084	99	37	34,2	cyclictest	69195	-21	kworker/u8:1+events_unbound	08:45:26	0
4170084	99	36	33,2	cyclictest	4185474	-21	kworker/u8:0+events_unbound	07:40:23	0
4170088	99	35	29,4	cyclictest	100476	-21	latency_hist	09:10:01	1
4170084	99	35	31,2	cyclictest	100495	-21	kworker/u8:4+events_unbound	10:45:25	0
4170088	99	34	30,3	cyclictest	147212	-21	apt-get	09:55:12	1
4170084	99	34	31,2	cyclictest	79519	-21	kworker/u8:2+events_unbound	09:55:19	0
4170084	99	33	30,2	cyclictest	100495	-21	kworker/u8:4+events_unbound	10:10:22	0
4170084	99	33	29,3	cyclictest	183623	-21	kworker/u8:2+events_unbound	10:35:23	0
4170094	99	32	29,2	cyclictest	1146027	-21	kworker/u8:2+events_unbound	07:43:27	3
4170084	99	32	29,2	cyclictest	79519	-21	kworker/u8:2+events_unbound	09:00:15	0
4170084	99	32	29,2	cyclictest	4185474	-21	kworker/u8:0+events_unbound	08:50:22	0
4170084	99	32	29,2	cyclictest	286499	-21	kworker/u8:0+events_unbound	12:10:24	0
4170094	99	31	28,2	cyclictest	75	-21	kswapd0	12:25:03	3
4170092	99	31	25,4	cyclictest	95755	-21	diskstats	09:05:14	2
4170084	99	31	26,3	cyclictest	302011	-21	apt-get	12:25:01	0
4170092	99	30	26,3	cyclictest	100495	-21	kworker/u8:4+events_unbound	10:50:19	2
4170088	99	30	6,17	cyclictest	259836	-21	ntpq	11:40:19	1
4170084	99	30	27,3	cyclictest	79519	-21	kworker/u8:2+events_unbound	09:25:27	0
4170084	99	30	27,2	cyclictest	1146027	-21	kworker/u8:2+events_unbound	07:50:25	0
4170094	99	29	24,3	cyclictest	17831	-21	cat	07:50:01	3
4170084	99	29	26,2	cyclictest	100495	-21	kworker/u8:4+events_unbound	10:30:22	0
4170084	99	29	25,3	cyclictest	100495	-21	kworker/u8:4+flush-259:0	11:10:28	0
4170084	99	29	25,2	cyclictest	224571	-21	kworker/u8:1+events_unbound	11:19:59	0
4170094	99	28	26,1	cyclictest	235147	-21	kworker/u8:3+events_unbound	12:20:14	3
4170094	99	28	25,2	cyclictest	100495	-21	kworker/u8:4+events_unbound	10:49:53	3
4170094	99	28	22,4	cyclictest	266240	-21	diskstats	11:50:13	3
4170094	99	28	21,5	cyclictest	161505	-21	ntpq	10:05:21	3
4170092	99	28	24,3	cyclictest	255531	-21	kworker/u8:0+events_unbound	11:50:12	2
4170092	99	28	24,3	cyclictest	183623	-21	kworker/u8:2+events_unbound	10:40:16	2
4170084	99	28	27,1	cyclictest	1146027	-21	kworker/u8:2+events_unbound	08:10:28	0
4170084	99	28	26,2	cyclictest	173348	-21	kworker/u8:0+events_unbound	10:20:24	0
4170084	99	28	25,2	cyclictest	100495	-21	kworker/u8:4+events_unbound	10:05:20	0
4170094	99	27	24,2	cyclictest	4175189	-21	kworker/u8:3+events_unbound	07:32:26	3
4170092	99	27	24,2	cyclictest	1146027	-21	kworker/u8:2+flush-259:0	08:15:15	2
4170092	99	27	23,3	cyclictest	69195	-21	kworker/u8:1+flush-259:0	09:20:00	2
4170092	99	27	23,3	cyclictest	48338	-21	kworker/u8:1+events_unbound	08:30:13	2
4170092	99	27	22,3	cyclictest	1146027	-21	kworker/u8:2+events_unbound	08:25:23	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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