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 Jun 30, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3371286	99	62	58,3	cyclictest	3361042	-21	kworker/u8:3+flush-259:0	07:20:00	3
3371278	99	55	48,5	cyclictest	3661422	-21	latency_hist	11:50:00	1
3371281	99	51	45,4	cyclictest	3687705	-21	latency_hist	12:15:00	2
3371278	99	50	42,5	cyclictest	3666615	-21	latency_hist	11:55:00	1
3371273	99	50	48,1	cyclictest	1	-21	systemd	08:20:00	0
3371281	99	48	44,3	cyclictest	3603902	-21	gpgv	10:55:00	2
3371278	99	47	41,4	cyclictest	335557	-21	systemd-journal	07:39:59	1
3371278	99	46	42,3	cyclictest	3496014	-21	kworker/u8:0+events_unbound	10:40:14	1
3371281	99	45	40,3	cyclictest	3651119	-21	latency_hist	11:40:00	2
3371286	99	44	37,5	cyclictest	3391831	-21	latency_hist	07:30:00	3
3371281	99	42	39,2	cyclictest	3496014	-21	kworker/u8:0+flush-259:0	10:35:15	2
3371278	99	42	39,2	cyclictest	3688355	-21	kworker/u8:2+flush-259:0	12:17:10	1
3371281	99	40	34,4	cyclictest	3677336	-21	latency_hist	12:05:00	2
3371278	99	40	36,3	cyclictest	3661661	-21	kworker/u8:1+events_unbound	12:13:11	1
3371278	99	40	36,3	cyclictest	3651139	-21	kworker/u8:0+events_unbound	12:01:00	1
3371278	99	40	36,3	cyclictest	3496014	-21	kworker/u8:0+events_unbound	11:03:01	1
3371278	99	40	36,3	cyclictest	3453938	-21	kworker/u8:1+events_unbound	10:14:04	1
3371278	99	40	34,4	cyclictest	3412405	-21	latency_hist	07:50:01	1
3371281	99	39	35,3	cyclictest	3402336	-21	kworker/u8:4+flush-259:0	08:35:00	2
3371278	99	39	35,3	cyclictest	3557516	-21	kworker/u8:3+events_unbound	10:32:00	1
3371278	99	39	35,3	cyclictest	3210542	-21	kworker/u8:0+events_unbound	07:28:27	1
3371281	99	38	35,2	cyclictest	3677571	-21	kworker/u8:4+flush-259:0	12:30:15	2
3371278	99	38	35,2	cyclictest	3557516	-21	kworker/u8:3+events_unbound	10:15:24	1
3371278	99	38	34,3	cyclictest	3496014	-21	kworker/u8:0+events_unbound	10:55:23	1
3371278	99	38	34,3	cyclictest	3361042	-21	kworker/u8:3+events_unbound	07:33:01	1
3371278	99	37	34,2	cyclictest	3412636	-21	kworker/u8:3+events_unbound	07:55:24	1
3371278	99	37	34,2	cyclictest	3402336	-21	kworker/u8:4+events_unbound	07:40:15	1
3371278	99	37	33,3	cyclictest	3651139	-21	kworker/u8:0+events_unbound	11:59:29	1
3371278	99	37	33,3	cyclictest	3562920	-21	kworker/u8:4+events_unbound	10:24:07	1
3371278	99	37	31,4	cyclictest	3464453	-21	latency_hist	08:40:01	1
3371281	99	36	30,4	cyclictest	3516396	-21	latency_hist	09:29:59	2
3371278	99	36	33,2	cyclictest	3453938	-21	kworker/u8:1+events_unbound	09:29:00	1
3371278	99	36	32,3	cyclictest	3333430	-21	kworker/u8:2+events_unbound	07:13:26	1
3371278	99	36	30,4	cyclictest	3593836	-21	/usr/sbin/munin	10:45:15	1
3371273	99	36	29,5	cyclictest	3453938	-21	kworker/u8:1+flush-259:0	09:35:16	0
3371281	99	35	32,2	cyclictest	3496014	-21	kworker/u8:0+flush-259:0	11:20:00	2
3371278	99	35	32,2	cyclictest	3629624	-21	kworker/u8:3+events_unbound	11:40:25	1
3371278	99	35	32,2	cyclictest	3496014	-21	kworker/u8:0+events_unbound	09:10:15	1
3371278	99	35	32,2	cyclictest	3402336	-21	kworker/u8:4+events_unbound	09:23:52	1
3371278	99	35	31,2	cyclictest	3496014	-21	kworker/u8:0+events_unbound	09:55:17	1
3371273	99	35	29,4	cyclictest	3661661	-21	kworker/u8:1+flush-259:0	12:10:24	0
3371286	99	34	29,3	cyclictest	3516637	-21	/usr/sbin/munin	09:30:13	3
3371278	99	34	31,2	cyclictest	3333430	-21	kworker/u8:2+events_unbound	07:20:00	1
3371278	99	34	30,3	cyclictest	3698495	-21	kworker/u8:1+events_unbound	12:29:36	1
3371278	99	34	30,3	cyclictest	3698495	-21	kworker/u8:1+events_unbound	12:29:36	1
3371278	99	34	30,3	cyclictest	3630683	-21	kworker/u8:4+events_unbound	11:20:23	1
3371278	99	34	30,3	cyclictest	3496014	-21	kworker/u8:0+events_unbound	10:39:10	1
3371278	99	34	29,3	cyclictest	3557516	-21	kworker/u8:3+events_unbound	10:27:00	1
3371273	99	34	26,6	cyclictest	3603873	-21	latency_hist	10:55:01	0
3371286	99	33	29,3	cyclictest	3588487	-21	kworker/u8:2+flush-259:0	11:45:16	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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