OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rack0slot4s.osadl.org (updated Tue Sep 15, 2026 00:45:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3380762	2	384	362,13	sleep11	0	-21	swapper/11	19:06:50	3
3380927	2	377	333,12	sleep15	0	-21	swapper/15	19:09:04	7
3379180	2	358	339,6	sleep1	0	-21	swapper/1	19:05:19	1
3380969	2	357	322,29	sleep3	0	-21	swapper/3	19:09:39	9
3380876	2	356	317,13	sleep5	0	-21	swapper/5	19:08:20	11
3380959	2	354	335,13	sleep10	0	-21	swapper/10	19:09:30	2
3380674	2	354	296,15	sleep14	0	-21	swapper/14	19:05:49	6
3380879	2	352	332,13	sleep8	0	-21	swapper/8	19:08:24	14
3380797	2	352	312,13	sleep4	0	-21	swapper/4	19:07:15	10
3380880	2	350	331,12	sleep9	0	-21	swapper/9	19:08:24	15
3380718	2	350	329,14	sleep7	0	-21	swapper/7	19:06:15	13
3380962	2	349	328,14	sleep13	0	-21	swapper/13	19:09:34	5
3380812	2	349	330,13	sleep0	0	-21	swapper/0	19:07:28	0
3380710	2	349	339,6	sleep2	0	-21	swapper/2	19:06:08	8
3380807	2	348	327,13	sleep12	0	-21	swapper/12	19:07:23	4
3380755	2	345	325,13	sleep6	0	-21	swapper/6	19:06:46	12
3381373	99	67	66,1	cyclictest	3710260	-21	kworker/u32:0+flush-259:0	00:30:21	8
3381380	99	56	55,1	cyclictest	3510929	-21	kworker/u32:1+events_unbound	21:35:15	10
3381380	99	55	52,2	cyclictest	3469625	-21	kworker/u32:3+events_unbound	21:25:00	10
3381378	99	51	0,49	cyclictest	782	-21	systemd-journal	19:50:18	9
3381391	99	46	44,2	cyclictest	3601664	-21	kworker/u32:3+events_unbound	22:44:21	14
3381404	99	45	42,2	cyclictest	3678179	-21	kworker/u32:1+events_unbound	23:43:15	4
3381404	99	45	42,2	cyclictest	3678179	-21	kworker/u32:1+events_unbound	23:43:14	4
3381391	99	44	42,2	cyclictest	3476845	-21	kworker/u32:0+events_unbound	21:42:55	14
3381410	99	42	7,11	cyclictest	0	-21	swapper/14	00:04:17	6
3381410	99	42	41,1	cyclictest	3476845	-21	kworker/u32:0+events_unbound	22:11:05	6
3381399	99	42	41,1	cyclictest	3649240	-21	kworker/u32:2+events_unbound	23:50:18	2
3381391	99	42	41,1	cyclictest	3457252	-21	kworker/u32:1+flush-259:0	20:50:13	14
3381391	99	42	39,2	cyclictest	3542762	-21	kworker/u32:1+events_unbound	21:58:18	14
3381400	99	41	40,1	cyclictest	3476845	-21	kworker/u32:0+flush-259:0	21:50:22	3
3381385	99	41	39,2	cyclictest	3364562	-21	kworker/u32:4+flush-259:0	19:35:20	12
3381380	99	41	40,0	cyclictest	3531576	-21	kworker/u32:5+events_unbound	21:53:09	10
3381368	99	41	39,2	cyclictest	3476845	-21	kworker/u32:0+flush-259:0	22:26:50	0
3381385	99	40	38,2	cyclictest	3661238	-21	kworker/u32:4+events_unbound	00:29:20	12
3381410	99	38	37,1	cyclictest	3627785	-21	kworker/u32:1+flush-259:0	23:22:31	6
3381399	99	37	36,1	cyclictest	3649240	-21	kworker/u32:2+events_unbound	23:40:15	2
3381399	99	37	36,1	cyclictest	3649240	-21	kworker/u32:2+events_unbound	23:40:14	2
3381399	99	37	29,1	cyclictest	3566310	-21	kworker/10:0+events	22:22:46	2
3381400	99	36	33,2	cyclictest	3661238	-21	kworker/u32:4+events_unbound	00:03:44	3
3381383	99	36	36,0	cyclictest	0	-21	swapper/5	19:22:52	11
3381399	99	35	34,1	cyclictest	0	-21	swapper/10	22:15:22	2
3381383	99	35	35,0	cyclictest	0	-21	swapper/5	21:15:15	11
3381383	99	35	35,0	cyclictest	0	-21	swapper/5	20:40:30	11
3381383	99	35	35,0	cyclictest	0	-21	swapper/5	20:40:29	11
3381383	99	35	35,0	cyclictest	0	-21	swapper/5	00:21:00	11
3381380	99	35	33,1	cyclictest	3661238	-21	kworker/u32:4+events_unbound	23:30:27	10
3381404	99	34	32,2	cyclictest	3432273	-21	kworker/u32:0+flush-259:0	20:28:27	4
3381399	99	34	34,0	cyclictest	0	-21	swapper/10	00:10:00	2
3381399	99	34	31,2	cyclictest	0	-21	swapper/10	21:20:06	2
3381385	99	34	33,1	cyclictest	3649240	-21	kworker/u32:2+flush-259:0	00:16:00	12
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17