OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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 rack0slot2.osadl.org (updated Thu May 14, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
650955	2	94	0,1	sleep7	650954	-21	cut	07:08:15	7
650521	99	51	49,2	cyclictest	1019520	-21	kworker/u16:3+flush-8:0	11:58:27	5
650211	2	47	36,7	sleep5	0	-21	swapper/5	07:07:42	5
650521	99	46	44,2	cyclictest	1252298	-21	kworker/u16:0+events_unbound	12:28:30	5
650521	99	46	44,2	cyclictest	1252298	-21	kworker/u16:0+events_unbound	12:28:30	5
650146	2	41	5,31	sleep7	0	-21	swapper/7	07:06:47	7
650521	99	39	37,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	12:21:08	5
650521	99	38	36,2	cyclictest	982179	-21	kworker/u16:2+events_unbound	10:00:16	5
650521	99	38	36,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	10:56:19	5
650521	99	38	36,2	cyclictest	1006014	-21	kworker/u16:0+events_unbound	10:31:03	5
650521	99	38	35,2	cyclictest	827135	-21	kworker/u16:4+events_unbound	09:23:31	5
650174	2	38	28,7	sleep4	0	-21	swapper/4	07:07:09	4
650521	99	37	35,2	cyclictest	865829	-21	kworker/u16:0+events_unbound	09:33:04	5
650521	99	37	35,2	cyclictest	1252298	-21	kworker/u16:0+events_unbound	12:33:21	5
650521	99	37	35,2	cyclictest	1201921	-21	kworker/u16:1+events_unbound	11:26:31	5
650521	99	37	35,2	cyclictest	1019520	-21	kworker/u16:3+flush-8:0	12:05:03	5
650521	99	37	35,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	12:23:52	5
650521	99	37	35,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	12:17:55	5
650521	99	37	35,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	10:45:15	5
650526	99	36	32,3	cyclictest	1387323	-21	/usr/sbin/munin	12:33:17	7
650521	99	36	34,2	cyclictest	865829	-21	kworker/u16:0+flush-8:0	09:29:04	5
650521	99	36	34,2	cyclictest	1201921	-21	kworker/u16:1+events_unbound	12:09:27	5
650521	99	36	34,2	cyclictest	1142164	-21	kworker/u16:4+events_unbound	11:05:52	5
650521	99	36	34,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	10:42:36	5
650521	99	36	33,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	10:08:03	5
650526	99	35	29,5	cyclictest	1203223	-21	latency_hist	11:18:02	7
650521	99	35	33,2	cyclictest	982383	-21	kworker/u16:3+events_unbound	09:53:55	5
650521	99	35	33,2	cyclictest	982179	-21	kworker/u16:2+flush-8:0	09:51:35	5
650521	99	35	33,2	cyclictest	982179	-21	kworker/u16:2+events_unbound	10:05:48	5
650521	99	35	33,2	cyclictest	865829	-21	kworker/u16:0+events_unbound	09:45:19	5
650521	99	35	33,2	cyclictest	865829	-21	kworker/u16:0+events_unbound	09:45:19	5
650521	99	35	33,2	cyclictest	1201921	-21	kworker/u16:1+events_unbound	11:45:07	5
650521	99	35	33,2	cyclictest	1176750	-21	kworker/u16:0+events_unbound	11:14:47	5
650521	99	35	33,2	cyclictest	1142164	-21	kworker/u16:4+flush-8:0	11:09:55	5
650521	99	35	33,2	cyclictest	1142164	-21	kworker/u16:4+events_unbound	11:00:00	5
650521	99	35	33,2	cyclictest	1019520	-21	kworker/u16:3+flush-8:0	11:51:03	5
650521	99	35	33,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	11:31:08	5
650521	99	34	32,2	cyclictest	856216	-21	kworker/u16:1+events_unbound	09:10:32	5
650521	99	34	32,2	cyclictest	1056677	-21	kworker/u16:1+events_unbound	10:24:16	5
650521	99	34	32,2	cyclictest	1019520	-21	kworker/u16:3+flush-8:0	10:19:35	5
650521	99	34	32,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	10:33:43	5
650521	99	34	31,2	cyclictest	578190	-21	kworker/u16:0+flush-8:0	07:28:04	5
1370174	2	34	0,1	chrt	1370175	-21	kthreadcore	12:23:24	7
650521	99	33	31,2	cyclictest	856216	-21	kworker/u16:1+events_unbound	09:20:24	5
650521	99	33	31,2	cyclictest	1142164	-21	kworker/u16:4+events_unbound	11:21:20	5
650521	99	33	31,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	11:57:51	5
650521	99	33	31,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	11:42:56	5
650521	99	32	30,2	cyclictest	1142164	-21	kworker/u16:4+events_unbound	11:34:04	5
650521	99	32	30,2	cyclictest	1056677	-21	kworker/u16:1+events_unbound	10:50:51	5
650521	99	32	30,2	cyclictest	1019520	-21	kworker/u16:3+events_unbound	10:15:56	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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