OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #f, slot #7

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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 rackfslot7.osadl.org (updated Mon Aug 24, 2026 00:46:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3027196	99	55	13,23	cyclictest	3171975	-21	ntpq	23:30:21	4
3027193	99	55	15,39	cyclictest	0	-21	swapper/1	22:40:15	1
3027197	99	50	12,19	cyclictest	0	-21	swapper/5	23:25:13	5
3027193	99	45	5,39	cyclictest	0	-21	swapper/1	20:40:16	1
3027198	99	44	25,0	cyclictest	3057811	-21	kworker/u32:0+events_unbound	20:23:57	6
3027194	99	43	4,39	cyclictest	0	-21	swapper/2	23:55:17	2
3027194	99	42	3,39	cyclictest	0	-21	swapper/2	19:50:16	2
3027193	99	42	4,19	cyclictest	0	-21	swapper/1	23:10:16	1
3027193	99	41	3,19	cyclictest	0	-21	swapper/1	21:05:15	1
3027193	99	41	1,38	cyclictest	0	-21	swapper/1	23:50:16	1
3027198	99	40	2,19	cyclictest	0	-21	swapper/6	22:15:15	6
3027198	99	40	1,39	cyclictest	0	-21	swapper/6	22:35:15	6
3027194	99	39	21,18	cyclictest	0	-21	swapper/2	22:25:14	2
3027198	99	37	18,19	cyclictest	79	-21	ksoftirqd/6	21:50:18	6
3027198	99	37	18,19	cyclictest	0	-21	swapper/6	21:15:16	6
3027198	99	37	0,18	cyclictest	0	-21	swapper/6	21:25:16	6
3027198	99	36	18,18	cyclictest	0	-21	swapper/6	00:35:16	6
3027198	99	35	0,35	cyclictest	0	-21	swapper/6	00:10:16	6
3027197	99	35	0,35	cyclictest	0	-21	swapper/5	00:00:17	5
3027194	99	35	17,18	cyclictest	871	-21	mta-sts-daemon	20:00:15	2
3027194	99	35	0,15	cyclictest	0	-21	swapper/2	23:20:17	2
3027194	99	35	0,15	cyclictest	0	-21	swapper/2	23:05:15	2
3027194	99	35	0,15	cyclictest	0	-21	swapper/2	20:25:16	2
3027193	99	35	0,16	cyclictest	0	-21	swapper/1	23:45:16	1
3027193	99	35	0,16	cyclictest	0	-21	swapper/1	22:55:18	1
3027193	99	35	0,16	cyclictest	0	-21	swapper/1	21:15:17	1
3027198	99	34	15,19	cyclictest	0	-21	swapper/6	23:20:16	6
3027198	99	34	14,20	cyclictest	77	1	rcuc/6	23:50:16	6
3027198	99	34	0,15	cyclictest	0	-21	swapper/6	21:20:17	6
3027197	99	34	15,19	cyclictest	0	-21	swapper/5	00:05:17	5
3027197	99	34	0,34	cyclictest	0	-21	swapper/5	20:05:17	5
3027197	99	34	0,34	cyclictest	0	-21	swapper/5	20:00:15	5
3027197	99	34	0,15	cyclictest	0	-21	swapper/5	19:40:17	5
3027194	99	34	0,15	cyclictest	0	-21	swapper/2	00:05:17	2
3027193	99	34	15,19	cyclictest	0	-21	swapper/1	22:45:16	1
3027193	99	34	15,19	cyclictest	0	-21	swapper/1	22:45:16	1
3027193	99	34	15,19	cyclictest	0	-21	swapper/1	22:00:16	1
3027193	99	34	0,34	cyclictest	0	-21	swapper/1	21:50:19	1
3027198	99	33	14,19	cyclictest	0	-21	swapper/6	22:50:13	6
3027198	99	33	14,19	cyclictest	0	-21	swapper/6	22:30:15	6
3027198	99	33	14,19	cyclictest	0	-21	swapper/6	20:15:19	6
3027198	99	33	14,19	cyclictest	0	-21	swapper/6	19:55:17	6
3027198	99	33	14,19	cyclictest	0	-21	swapper/6	00:05:16	6
3027197	99	33	18,15	cyclictest	0	-21	swapper/5	21:15:17	5
3027197	99	33	14,19	cyclictest	0	-21	swapper/5	20:55:15	5
3027197	99	33	14,19	cyclictest	0	-21	swapper/5	20:40:17	5
3027197	99	33	14,19	cyclictest	0	-21	swapper/5	20:30:16	5
3027197	99	33	14,19	cyclictest	0	-21	swapper/5	00:20:16	5
3027197	99	33	14,0	cyclictest	0	-21	swapper/5	21:45:16	5
3027196	99	33	29,4	cyclictest	3028442	-21	grep	19:10:17	4
3027194	99	33	14,19	cyclictest	0	-21	swapper/2	23:15:15	2
3027194	99	33	14,19	cyclictest	0	-21	swapper/2	20:40:16	2
3027194	99	33	14,19	cyclictest	0	-21	swapper/2	20:10:15	2
3027194	99	33	13,20	cyclictest	0	-21	swapper/2	20:45:16	2
3027193	99	33	14,19	cyclictest	0	-21	swapper/1	20:35:22	1
3027193	99	33	14,19	cyclictest	0	-21	swapper/1	20:30:16	1
3027193	99	33	14,19	cyclictest	0	-21	swapper/1	19:35:16	1
3027193	99	33	14,19	cyclictest	0	-21	swapper/1	00:25:18	1
3027193	99	33	14,19	cyclictest	0	-21	swapper/1	00:10:17	1
3027193	99	33	14,19	cyclictest	0	-21	swapper/1	00:00:17	1
3027193	99	33	14,0	cyclictest	0	-21	swapper/1	21:35:16	1
3027193	99	33	13,19	cyclictest	0	-21	swapper/1	19:15:15	1
3027192	99	33	14,19	cyclictest	0	-21	swapper/0	22:20:16	0
3027192	99	33	14,19	cyclictest	0	-21	swapper/0	19:23:44	0
3027198	99	32	13,19	cyclictest	0	-21	swapper/6	20:50:17	6
3027197	99	32	13,19	cyclictest	0	-21	swapper/5	23:40:13	5
3027197	99	32	13,19	cyclictest	0	-21	swapper/5	00:15:17	5
3027194	99	32	14,18	cyclictest	0	-21	swapper/2	21:10:16	2
3027194	99	32	14,18	cyclictest	0	-21	swapper/2	20:15:18	2
3027194	99	32	14,18	cyclictest	0	-21	swapper/2	00:15:17	2
3027194	99	32	13,19	cyclictest	0	-21	swapper/2	23:00:16	2
3027194	99	32	13,19	cyclictest	0	-21	swapper/2	23:00:16	2
3027194	99	32	13,19	cyclictest	0	-21	swapper/2	20:05:17	2
3027194	99	32	13,19	cyclictest	0	-21	swapper/2	19:55:17	2
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	23:40:13	1
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	23:35:17	1
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	23:30:18	1
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	22:50:13	1
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	22:30:14	1
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	21:30:16	1
3027193	99	32	13,19	cyclictest	0	-21	swapper/1	19:30:16	1
3027192	99	32	13,19	cyclictest	0	-21	swapper/0	21:05:16	0
3027198	99	31	13,0	cyclictest	0	-21	swapper/6	21:10:16	6
3027197	99	31	12,19	cyclictest	0	-21	swapper/5	23:10:16	5
3027197	99	31	12,19	cyclictest	0	-21	swapper/5	22:20:17	5
3027197	99	31	12,19	cyclictest	0	-21	swapper/5	20:10:15	5
3027196	99	31	11,19	cyclictest	60	1	ktimers/4	20:50:06	4
3027196	99	31	10,20	cyclictest	0	-21	swapper/4	22:33:42	4
3027196	99	31	10,20	cyclictest	0	-21	swapper/4	20:15:17	4
3027194	99	31	12,19	cyclictest	0	-21	swapper/2	22:05:17	2
3027194	99	31	12,19	cyclictest	0	-21	swapper/2	21:35:17	2
3027194	99	31	12,19	cyclictest	0	-21	swapper/2	21:20:16	2
3027193	99	31	12,19	cyclictest	0	-21	swapper/1	21:45:16	1
3027193	99	31	11,20	cyclictest	0	-21	swapper/1	20:05:16	1
3027198	99	30	11,19	cyclictest	0	-21	swapper/6	21:00:15	6
3027198	99	30	11,19	cyclictest	0	-21	swapper/6	19:29:54	6
3027197	99	30	12,18	cyclictest	0	-21	swapper/5	22:45:17	5
3027197	99	30	12,18	cyclictest	0	-21	swapper/5	22:45:16	5
3027197	99	30	11,19	cyclictest	0	-21	swapper/5	23:35:16	5
3027197	99	30	11,19	cyclictest	0	-21	swapper/5	00:36:13	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2024-07-29 - 23:00