OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 100 highest latencies:

System rack0slot6s.osadl.org (updated Thu Jul 30, 2026 00:46:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
672177	2	275	268,4	sleep10	0	-21	swapper/10	19:07:24	2
672181	2	255	248,4	sleep13	0	-21	swapper/13	19:07:27	5
672349	2	246	207,12	sleep4	0	-21	swapper/4	19:09:39	14
672166	2	245	238,4	sleep1	0	-21	swapper/1	19:07:15	1
672160	2	240	203,28	sleep17	0	-21	swapper/17	19:07:11	9
672343	2	239	219,12	sleep19	0	-21	swapper/19	19:09:34	11
672204	2	233	212,8	sleep7	0	-21	swapper/7	19:07:41	17
672144	2	233	215,11	sleep3	0	-21	swapper/3	19:06:56	13
672244	2	232	212,12	sleep14	0	-21	swapper/14	19:08:08	6
669121	2	232	213,12	sleep18	0	-21	swapper/18	19:05:12	10
672252	2	231	211,12	sleep0	0	-21	swapper/0	19:08:14	0
672101	2	231	211,12	sleep8	0	-21	swapper/8	19:06:22	18
672333	2	230	209,13	sleep9	0	-21	swapper/9	19:09:24	19
672116	2	229	209,12	sleep2	0	-21	swapper/2	19:06:36	12
672075	2	229	210,12	sleep5	0	-21	swapper/5	19:05:59	15
668248	2	229	210,12	sleep6	0	-21	swapper/6	19:05:00	16
672219	2	228	209,12	sleep16	0	-21	swapper/16	19:07:50	8
672245	2	226	207,12	sleep15	0	-21	swapper/15	19:08:09	7
672211	2	222	204,11	sleep11	0	-21	swapper/11	19:07:44	3
672336	2	216	196,12	sleep12	0	-21	swapper/12	19:09:26	4
672795	99	93	7,38	cyclictest	0	-21	swapper/9	20:03:30	19
672797	99	60	60,0	cyclictest	0	-21	swapper/10	23:18:30	2
672788	99	43	37,6	cyclictest	0	-21	swapper/7	22:52:59	17
672795	99	35	0,34	cyclictest	0	-21	swapper/9	21:52:59	19
672782	99	35	30,4	cyclictest	0	-21	swapper/5	22:52:59	15
672821	99	34	0,33	cyclictest	0	-21	swapper/17	21:16:59	9
672807	99	34	33,1	cyclictest	0	-21	swapper/13	21:40:59	5
672795	99	34	34,0	cyclictest	0	-21	swapper/9	22:54:59	19
672779	99	34	0,33	cyclictest	0	-21	swapper/4	21:33:59	14
672823	99	33	33,0	cyclictest	0	-21	swapper/18	20:52:58	10
672823	99	33	0,33	cyclictest	0	-21	swapper/18	20:46:59	10
672823	99	33	0,33	cyclictest	0	-21	swapper/18	20:46:59	10
672821	99	33	33,0	cyclictest	0	-21	swapper/17	21:20:58	9
672821	99	33	0,33	cyclictest	0	-21	swapper/17	22:19:59	9
672821	99	33	0,0	cyclictest	0	-21	swapper/17	20:18:59	9
672816	99	33	0,33	cyclictest	0	-21	swapper/16	00:16:58	8
672813	99	33	33,0	cyclictest	0	-21	swapper/15	21:51:59	7
672813	99	33	33,0	cyclictest	0	-21	swapper/15	20:49:59	7
672813	99	33	33,0	cyclictest	0	-21	swapper/15	20:49:59	7
672813	99	33	0,33	cyclictest	0	-21	swapper/15	00:39:59	7
672813	99	33	0,0	cyclictest	0	-21	swapper/15	22:00:59	7
672811	99	33	33,0	cyclictest	0	-21	swapper/14	19:58:59	6
672811	99	33	0,33	cyclictest	0	-21	swapper/14	22:41:59	6
672811	99	33	0,33	cyclictest	0	-21	swapper/14	21:13:59	6
672811	99	33	0,33	cyclictest	0	-21	swapper/14	21:08:59	6
672792	99	33	33,0	cyclictest	0	-21	swapper/8	20:20:59	18
672785	99	33	31,1	cyclictest	0	-21	swapper/6	23:05:59	16
672785	99	33	28,4	cyclictest	0	-21	swapper/6	22:52:59	16
672782	99	33	32,1	cyclictest	0	-21	swapper/5	22:00:59	15
672779	99	33	33,0	cyclictest	0	-21	swapper/4	23:55:59	14
672779	99	33	33,0	cyclictest	0	-21	swapper/4	23:55:59	14
672779	99	33	33,0	cyclictest	0	-21	swapper/4	23:14:59	14
672779	99	33	33,0	cyclictest	0	-21	swapper/4	22:36:58	14
672779	99	33	0,0	cyclictest	0	-21	swapper/4	00:03:59	14
672779	99	33	0,0	cyclictest	0	-21	swapper/4	00:03:59	14
672775	99	33	0,33	cyclictest	0	-21	swapper/3	21:10:58	13
672775	99	33	0,33	cyclictest	0	-21	swapper/3	20:04:59	13
672775	99	33	0,33	cyclictest	0	-21	swapper/3	19:28:59	13
672775	99	33	0,0	cyclictest	0	-21	swapper/3	00:37:58	13
672771	99	33	0,0	cyclictest	0	-21	swapper/2	23:09:59	12
672766	99	33	32,1	cyclictest	0	-21	swapper/1	21:40:59	1
672766	99	33	28,4	cyclictest	33	1	rcuc/1	22:52:59	1
672766	99	33	0,0	cyclictest	0	-21	swapper/1	20:47:59	1
672766	99	33	0,0	cyclictest	0	-21	swapper/1	20:47:58	1
672823	99	32	32,0	cyclictest	0	-21	swapper/18	23:59:59	10
672823	99	32	32,0	cyclictest	0	-21	swapper/18	23:59:58	10
672821	99	32	32,0	cyclictest	0	-21	swapper/17	20:14:59	9
672821	99	32	32,0	cyclictest	0	-21	swapper/17	20:01:59	9
672816	99	32	0,0	cyclictest	0	-21	swapper/16	19:17:59	8
672813	99	32	32,0	cyclictest	0	-21	swapper/15	23:24:59	7
672813	99	32	32,0	cyclictest	0	-21	swapper/15	22:18:59	7
672813	99	32	32,0	cyclictest	0	-21	swapper/15	21:24:59	7
672813	99	32	32,0	cyclictest	0	-21	swapper/15	19:18:59	7
672813	99	32	32,0	cyclictest	0	-21	swapper/15	00:09:59	7
672813	99	32	32,0	cyclictest	0	-21	swapper/15	00:09:59	7
672811	99	32	32,0	cyclictest	0	-21	swapper/14	22:27:59	6
672811	99	32	32,0	cyclictest	0	-21	swapper/14	19:48:59	6
672811	99	32	32,0	cyclictest	0	-21	swapper/14	19:28:59	6
672811	99	32	0,32	cyclictest	0	-21	swapper/14	23:08:59	6
672811	99	32	0,32	cyclictest	0	-21	swapper/14	20:27:59	6
672811	99	32	0,32	cyclictest	0	-21	swapper/14	19:41:59	6
672811	99	32	0,32	cyclictest	0	-21	swapper/14	19:36:59	6
672811	99	32	0,32	cyclictest	0	-21	swapper/14	00:21:59	6
672811	99	32	0,0	cyclictest	0	-21	swapper/14	22:53:59	6
672807	99	32	0,0	cyclictest	0	-21	swapper/13	20:47:59	5
672807	99	32	0,0	cyclictest	0	-21	swapper/13	20:47:59	5
672797	99	32	32,0	cyclictest	0	-21	swapper/10	22:06:59	2
672797	99	32	0,32	cyclictest	0	-21	swapper/10	22:45:59	2
672792	99	32	32,0	cyclictest	0	-21	swapper/8	23:15:59	18
672792	99	32	32,0	cyclictest	0	-21	swapper/8	23:01:59	18
672792	99	32	32,0	cyclictest	0	-21	swapper/8	22:03:59	18
672792	99	32	32,0	cyclictest	0	-21	swapper/8	21:14:59	18
672792	99	32	32,0	cyclictest	0	-21	swapper/8	21:05:59	18
672792	99	32	32,0	cyclictest	0	-21	swapper/8	20:27:59	18
672792	99	32	32,0	cyclictest	0	-21	swapper/8	00:24:59	18
672782	99	32	32,0	cyclictest	0	-21	swapper/5	23:05:59	15
672779	99	32	32,0	cyclictest	0	-21	swapper/4	00:32:59	14
672779	99	32	0,32	cyclictest	0	-21	swapper/4	23:28:59	14
672775	99	32	32,0	cyclictest	0	-21	swapper/3	21:29:59	13
672771	99	32	32,0	cyclictest	0	-21	swapper/2	22:59:59	12
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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