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 Jun 26, 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
3169170	99	48	45,2	cyclictest	3503320	-21	kworker/u8:0+events_unbound	12:32:33	1
3169170	99	46	43,2	cyclictest	3314330	-21	kworker/u8:0+events_unbound	11:08:23	1
3169170	99	45	42,2	cyclictest	3366342	-21	kworker/u8:1+events_unbound	10:51:23	1
3169178	99	44	31,11	cyclictest	3330183	-21	latency_hist	09:45:00	3
3169170	99	44	39,4	cyclictest	3424572	-21	latency_hist	11:15:01	1
3169173	99	43	39,3	cyclictest	3503320	-21	kworker/u8:0+events_unbound	12:33:34	2
3169173	99	43	39,3	cyclictest	3314330	-21	kworker/u8:0+flush-259:0	10:05:20	2
3169170	99	43	41,2	cyclictest	3314330	-21	kworker/u8:0+events_unbound	11:44:14	1
3169173	99	42	39,2	cyclictest	3366342	-21	kworker/u8:1+flush-259:0	10:55:00	2
3169173	99	42	37,3	cyclictest	3482549	-21	base64	12:10:00	2
3169170	99	42	39,2	cyclictest	3314330	-21	kworker/u8:0+events_unbound	11:01:23	1
3169170	99	40	37,2	cyclictest	3314330	-21	kworker/u8:0+events_unbound	12:09:18	1
3169170	99	40	37,2	cyclictest	3236617	-21	kworker/u8:3+events_unbound	08:25:01	1
3169168	99	40	36,3	cyclictest	3262209	-21	kworker/u8:2+flush-259:0	08:55:21	0
3169178	99	39	31,6	cyclictest	3335502	-21	gpgv	09:50:00	3
3169170	99	39	36,2	cyclictest	3314330	-21	kworker/u8:0+events_unbound	11:54:26	1
3169168	99	39	35,3	cyclictest	3314330	-21	kworker/u8:0+flush-259:0	10:05:00	0
3169173	99	38	35,2	cyclictest	3293710	-21	kworker/u8:2+flush-259:0	09:25:21	2
3169168	99	38	31,5	cyclictest	3360706	-21	ntpq	10:10:20	0
3169173	99	37	33,3	cyclictest	3451068	-21	kworker/u8:4+flush-259:0	12:00:21	2
3169178	99	36	30,4	cyclictest	3236626	-21	/usr/sbin/munin	08:15:14	3
3169170	99	36	31,3	cyclictest	3445454	-21	/usr/sbin/munin	11:35:14	1
3169178	99	35	28,5	cyclictest	3231245	-21	latency_hist	08:10:00	3
3169173	99	35	32,2	cyclictest	3350339	-21	kworker/u8:2+events_unbound	11:15:14	2
3169170	99	35	33,2	cyclictest	3262446	-21	kworker/u8:4+events_unbound	09:39:22	1
3169170	99	35	31,3	cyclictest	3314330	-21	kworker/u8:0+flush-259:0	12:10:16	1
3169168	99	35	33,1	cyclictest	3189906	-21	kworker/0:0+pm	08:02:22	0
3169178	99	34	28,4	cyclictest	3340044	-21	ntpq	09:50:20	3
3169173	99	34	31,2	cyclictest	3350339	-21	kworker/u8:2+flush-259:0	10:15:20	2
3169173	99	33	30,2	cyclictest	3262209	-21	kworker/u8:2+events_unbound	08:55:22	2
3169170	99	33	30,2	cyclictest	3190055	-21	kworker/u8:4+events_unbound	07:38:37	1
3169168	99	33	29,3	cyclictest	3314330	-21	kworker/u8:0+flush-259:0	10:40:23	0
3169173	99	32	28,3	cyclictest	3356662	-21	kworker/u8:4+flush-259:0	11:00:22	2
3169173	99	32	27,4	cyclictest	3200190	-21	latency_hist	07:40:00	2
3169168	99	32	26,4	cyclictest	3476923	-21	dpkg	12:02:19	0
3169173	99	31	28,2	cyclictest	3356662	-21	kworker/u8:4+events_unbound	11:12:23	2
3169173	99	31	28,2	cyclictest	3314330	-21	kworker/u8:0+flush-259:0	11:25:16	2
3169173	99	31	28,2	cyclictest	3246765	-21	kworker/u8:0+events_unbound	08:45:23	2
3169173	99	31	28,2	cyclictest	3171706	-21	kworker/u8:3+flush-259:0	07:20:24	2
3169173	99	31	27,3	cyclictest	3314330	-21	kworker/u8:0+flush-259:0	11:50:00	2
3169168	99	31	27,3	cyclictest	3493352	-21	kworker/u8:2+flush-259:0	12:35:16	0
3169168	99	31	25,4	cyclictest	335557	-21	systemd-journal	07:45:00	0
3169168	99	31	24,5	cyclictest	335557	-21	systemd-journal	09:25:01	0
3169178	99	30	25,4	cyclictest	3467045	-21	kworker/u8:3+flush-259:0	12:17:33	3
3169170	99	30	28,2	cyclictest	3293710	-21	kworker/u8:2+events_unbound	09:26:34	1
3169170	99	30	27,2	cyclictest	3451068	-21	kworker/u8:4+events_unbound	11:49:06	1
3169170	99	30	27,2	cyclictest	3230292	-21	kworker/u8:2+events_unbound	08:34:10	1
3169168	99	30	27,2	cyclictest	3356662	-21	kworker/u8:4+flush-259:0	11:10:00	0
3169168	99	30	25,3	cyclictest	3336001	-21	base64	09:50:01	0
3169173	99	29	26,2	cyclictest	3299609	-21	kworker/u8:1+flush-259:0	09:15:21	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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