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 Sat Aug 22, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
107052	2	59	48,7	sleep4	0	-21	swapper/4	07:04:48	4
107182	2	57	22,30	sleep7	0	-21	swapper/7	07:06:36	7
107550	99	48	43,4	cyclictest	662157	-21	latency_hist	11:17:26	7
107550	99	47	42,4	cyclictest	649869	-21	latency_hist	11:12:27	7
107546	99	45	41,3	cyclictest	660557	-21	kworker/u16:0+events_unbound	11:16:19	6
107236	2	45	35,7	sleep5	0	-21	swapper/5	07:07:22	5
107550	99	40	29,1	cyclictest	772114	-21	ssh	12:02:25	7
107550	99	39	34,4	cyclictest	344413	-21	diskmemload	11:49:52	7
107539	99	39	36,2	cyclictest	53191	-21	kworker/u16:0+events_unbound	07:27:29	4
107550	99	38	36,1	cyclictest	344413	-21	diskmemload	09:29:41	7
107550	99	38	36,1	cyclictest	0	-21	swapper/7	11:37:16	7
107550	99	38	34,3	cyclictest	794791	-21	ssh	12:09:13	7
107539	99	38	36,2	cyclictest	796970	-21	kworker/u16:4+events_unbound	12:34:08	4
107550	99	37	36,0	cyclictest	0	-21	swapper/7	10:47:28	7
107546	99	37	35,2	cyclictest	562590	-21	kworker/u16:1+events_unbound	10:46:12	6
107546	99	37	35,2	cyclictest	562590	-21	kworker/u16:1+events_unbound	10:46:12	6
107546	99	37	35,2	cyclictest	188811	-21	kworker/u16:3+events_unbound	08:02:28	6
107539	99	36	34,2	cyclictest	661562	-21	kworker/u16:5+events_unbound	11:50:53	4
107550	99	35	34,0	cyclictest	0	-21	swapper/7	10:55:09	7
107546	99	35	33,2	cyclictest	562590	-21	kworker/u16:1+events_unbound	10:41:05	6
107546	99	35	33,2	cyclictest	442653	-21	kworker/u16:4+events_unbound	10:24:22	6
107542	99	35	33,2	cyclictest	587664	-21	kworker/u16:2+flush-8:0	10:52:52	5
107542	99	35	33,2	cyclictest	542176	-21	kworker/u16:0+events_unbound	10:47:44	5
107542	99	35	33,2	cyclictest	405486	-21	kworker/u16:2+flush-8:0	09:47:22	5
107539	99	35	33,2	cyclictest	818585	-21	kworker/u16:0+events_unbound	12:32:05	4
107539	99	35	33,2	cyclictest	587664	-21	kworker/u16:2+events_unbound	10:59:21	4
107539	99	35	33,2	cyclictest	562590	-21	kworker/u16:1+events_unbound	10:48:52	4
107539	99	35	33,2	cyclictest	405486	-21	kworker/u16:2+events_unbound	10:07:28	4
107539	99	35	33,2	cyclictest	405486	-21	kworker/u16:2+events_unbound	09:58:42	4
107539	99	35	32,2	cyclictest	711613	-21	kworker/u16:3+events_unbound	12:02:27	4
107539	99	35	32,2	cyclictest	711613	-21	kworker/u16:3+events_unbound	12:02:27	4
107539	99	35	32,2	cyclictest	661562	-21	kworker/u16:5+flush-8:0	11:29:45	4
107539	99	35	32,2	cyclictest	149837	-21	kworker/u16:2+flush-8:0	07:37:29	4
107550	99	34	33,0	cyclictest	0	-21	swapper/7	11:03:53	7
107542	99	34	32,2	cyclictest	661561	-21	kworker/u16:4+events_unbound	11:20:24	5
107539	99	34	32,2	cyclictest	587664	-21	kworker/u16:2+events_unbound	10:53:00	4
107539	99	34	32,2	cyclictest	526293	-21	kworker/u16:2+events_unbound	10:29:49	4
107539	99	34	32,2	cyclictest	442652	-21	kworker/u16:3+flush-8:0	09:55:33	4
107550	99	33	32,0	cyclictest	0	-21	swapper/7	11:20:16	7
107550	99	33	32,0	cyclictest	0	-21	swapper/7	10:58:13	7
107550	99	33	32,0	cyclictest	0	-21	swapper/7	09:40:01	7
107550	99	33	31,1	cyclictest	783132	-21	ssh	12:05:13	7
107550	99	33	31,1	cyclictest	783132	-21	ssh	12:05:13	7
107539	99	33	31,2	cyclictest	769936	-21	kworker/u16:2+events_unbound	12:09:05	4
107539	99	33	31,2	cyclictest	735687	-21	kworker/u16:1+events_unbound	11:59:21	4
107539	99	33	31,2	cyclictest	711613	-21	kworker/u16:3+events_unbound	12:15:48	4
107539	99	33	31,2	cyclictest	709289	-21	kworker/u16:0+events_unbound	11:37:04	4
107539	99	33	31,2	cyclictest	660557	-21	kworker/u16:0+events_unbound	11:25:44	4
107539	99	33	31,2	cyclictest	660557	-21	kworker/u16:0+events_unbound	11:25:44	4
107539	99	33	31,2	cyclictest	542176	-21	kworker/u16:0+events_unbound	10:36:53	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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