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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 100 highest latencies:

System rack0slot4s.osadl.org (updated Thu May 28, 2026 00:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1020974	2	51	48,2	sleep8	0	-21	swapper/8	19:05:02	14
1024168	2	50	47,2	sleep15	0	-21	swapper/15	19:06:14	7
1024489	2	47	45,1	sleep4	0	-21	swapper/4	19:09:47	10
1024935	99	46	20,16	cyclictest	1774	-21	snmpd	19:40:22	13
1023625	2	46	44,1	sleep13	0	-21	swapper/13	19:05:23	5
1023423	2	42	39,2	sleep12	0	-21	swapper/12	19:05:22	4
1024189	2	40	34,1	sleep7	0	-21	swapper/7	19:06:22	13
1024429	2	39	37,1	sleep6	0	-21	swapper/6	19:09:01	12
1024322	2	38	36,1	sleep11	0	-21	swapper/11	19:07:45	3
1024329	2	37	34,2	sleep1	0	-21	swapper/1	19:07:52	1
1024115	2	37	34,2	sleep9	0	-21	swapper/9	19:05:35	15
1020981	2	37	35,1	sleep14	0	-21	swapper/14	19:05:08	6
1024929	99	36	0,35	cyclictest	1373688	-21	ssh	00:20:14	11
1024243	2	36	34,1	sleep5	0	-21	swapper/5	19:06:52	11
1024959	99	35	35,0	cyclictest	0	-21	swapper/15	22:13:19	7
1024920	99	35	34,1	cyclictest	2779210	-21	thunderbird	23:17:49	8
1024920	99	35	34,1	cyclictest	2779210	-21	thunderbird	22:34:27	8
1024920	99	35	34,1	cyclictest	2779210	-21	thunderbird	21:41:37	8
1024920	99	35	33,2	cyclictest	2779210	-21	thunderbird	00:05:01	8
1024920	99	35	31,3	cyclictest	1225554	-21	ssh	22:25:14	8
1024920	99	35	0,33	cyclictest	1259358	-21	kworker/u32:2+flush-259:0	23:55:17	8
1024477	2	35	33,1	sleep10	0	-21	swapper/10	19:09:37	2
1024959	99	34	34,0	cyclictest	0	-21	swapper/15	23:41:09	7
1024959	99	34	34,0	cyclictest	0	-21	swapper/15	23:10:35	7
1024929	99	34	30,4	cyclictest	0	-21	swapper/5	19:10:24	11
1024920	99	34	32,2	cyclictest	0	-21	swapper/2	22:55:57	8
1024920	99	34	31,3	cyclictest	0	-21	swapper/2	00:19:27	8
1024959	99	33	33,0	cyclictest	0	-21	swapper/15	23:16:36	7
1024959	99	33	33,0	cyclictest	0	-21	swapper/15	23:01:19	7
1024959	99	33	33,0	cyclictest	0	-21	swapper/15	22:46:58	7
1024959	99	33	31,2	cyclictest	0	-21	swapper/15	21:09:03	7
1024959	99	33	31,1	cyclictest	0	-21	swapper/15	21:57:40	7
1024956	99	33	9,11	cyclictest	0	-21	swapper/14	20:22:45	6
1024929	99	33	0,26	cyclictest	0	-21	swapper/5	23:30:23	11
1024923	99	33	33,0	cyclictest	0	-21	swapper/3	23:05:49	9
1024923	99	33	33,0	cyclictest	0	-21	swapper/3	22:56:19	9
1024920	99	33	32,1	cyclictest	2779210	-21	thunderbird	21:53:47	8
1024920	99	33	32,1	cyclictest	2779210	-21	thunderbird	19:35:16	8
1024920	99	33	32,1	cyclictest	1016047	-21	kworker/u32:1+flush-259:0	21:35:32	8
1024920	99	33	30,1	cyclictest	2779210	-21	thunderbird	22:01:47	8
1024920	99	33	29,4	cyclictest	2779210	-21	thunderbird	20:55:21	8
1024920	99	33	28,3	cyclictest	2779210	-21	thunderbird	20:36:52	8
1024920	99	33	28,2	cyclictest	2779210	-21	thunderbird	23:41:05	8
1024920	99	33	27,3	cyclictest	2779210	-21	thunderbird	21:46:02	8
1024380	2	33	30,2	sleep2	0	-21	swapper/2	19:08:25	8
1024268	2	33	31,1	sleep3	0	-21	swapper/3	19:07:06	9
1024170	2	33	29,3	sleep0	0	-21	swapper/0	19:06:15	0
1024949	99	32	30,2	cyclictest	1375512	-21	kworker/u32:0+flush-259:0	00:35:13	4
1024947	99	32	32,0	cyclictest	0	-21	swapper/11	22:13:02	3
1024947	99	32	32,0	cyclictest	0	-21	swapper/11	00:11:59	3
1024947	99	32	31,1	cyclictest	1247406	-21	kworker/u32:0+events_unbound	00:00:19	3
1024947	99	32	31,1	cyclictest	1028505	-21	kworker/u32:3+flush-259:0	19:20:17	3
1024947	99	32	31,1	cyclictest	1007576	-21	kworker/u32:0+events_unbound	22:07:26	3
1024929	99	32	26,1	cyclictest	0	-21	swapper/5	21:55:21	11
1024920	99	32	3,29	cyclictest	42	1	ktimers/2	19:40:57	8
1024920	99	32	31,1	cyclictest	2779309	-21	WRScene~ilder#1	22:37:14	8
1024920	99	32	31,1	cyclictest	2779210	-21	thunderbird	22:41:01	8
1024920	99	32	31,1	cyclictest	2779210	-21	thunderbird	21:27:32	8
1024920	99	32	28,2	cyclictest	2779210	-21	thunderbird	22:09:24	8
1024920	99	32	26,3	cyclictest	2779210	-21	thunderbird	22:23:55	8
1024920	99	32	26,3	cyclictest	2779210	-21	thunderbird	22:14:01	8
1024920	99	32	25,4	cyclictest	2779210	-21	thunderbird	22:46:41	8
1024920	99	32	0,30	cyclictest	2779210	-21	thunderbird	20:51:17	8
1024917	99	32	0,29	cyclictest	0	-21	swapper/1	23:45:15	1
1024959	99	31	31,0	cyclictest	0	-21	swapper/15	21:15:59	7
1024959	99	31	31,0	cyclictest	0	-21	swapper/15	19:43:37	7
1024959	99	31	31,0	cyclictest	0	-21	swapper/15	19:30:03	7
1024959	99	31	31,0	cyclictest	0	-21	swapper/15	19:24:32	7
1024959	99	31	30,1	cyclictest	1774	-21	snmpd	20:54:49	7
1024959	99	31	30,1	cyclictest	1774	-21	snmpd	19:26:16	7
1024959	99	31	30,1	cyclictest	1300080	-21	kworker/u32:1+events_unbound	23:35:18	7
1024956	99	31	7,11	cyclictest	0	-21	swapper/14	22:45:33	6
1024954	99	31	30,1	cyclictest	1774	-21	snmpd	19:11:13	5
1024949	99	31	0,30	cyclictest	0	-21	swapper/12	23:33:54	4
1024947	99	31	31,0	cyclictest	0	-21	swapper/11	23:45:33	3
1024947	99	31	31,0	cyclictest	0	-21	swapper/11	20:23:18	3
1024947	99	31	29,1	cyclictest	0	-21	swapper/11	00:35:05	3
1024944	99	31	8,2	cyclictest	2779210	-21	thunderbird	19:47:46	2
1024944	99	31	30,1	cyclictest	963768	-21	kworker/10:2+events	22:15:51	2
1024944	99	31	30,1	cyclictest	1379497	-21	kworker/10:1+events	00:31:49	2
1024944	99	31	30,1	cyclictest	0	-21	swapper/10	22:56:05	2
1024944	99	31	29,1	cyclictest	963768	-21	kworker/10:2+events	21:46:37	2
1024944	99	31	29,1	cyclictest	963768	-21	kworker/10:2+events	20:55:05	2
1024944	99	31	29,1	cyclictest	1379497	-21	kworker/10:1+events	00:37:25	2
1024938	99	31	0,30	cyclictest	1192721	-21	diskstats	22:00:11	14
1024935	99	31	0,30	cyclictest	0	-21	swapper/7	19:30:22	13
1024935	99	31	0,22	cyclictest	2779210	-21	thunderbird	22:15:13	13
1024929	99	31	27,1	cyclictest	1315722	-21	mii-tool	23:35:15	11
1024929	99	31	0,30	cyclictest	0	-21	swapper/5	21:00:46	11
1024929	99	31	0,28	cyclictest	0	-21	swapper/5	20:40:15	11
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	23:45:33	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	23:24:47	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	23:24:47	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	22:13:19	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	21:33:33	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	20:29:03	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	20:29:03	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	00:11:59	9
1024923	99	31	31,0	cyclictest	0	-21	swapper/3	00:05:03	9
1024923	99	31	30,1	cyclictest	1290267	-21	kworker/3:2-events	23:16:59	9
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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