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 Sun Jul 05, 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
2052198	2	55	20,30	sleep7	0	-21	swapper/7	07:08:01	7
2052035	2	49	38,8	sleep4	0	-21	swapper/4	07:05:42	4
2052538	99	48	46,2	cyclictest	2336250	-21	kworker/u16:7+events_unbound	10:24:13	4
2052538	99	47	44,2	cyclictest	2621049	-21	kworker/u16:1+events_unbound	11:53:49	4
2052538	99	42	40,2	cyclictest	2424865	-21	kworker/u16:2+events_unbound	10:33:30	4
2052551	99	41	36,4	cyclictest	2338758	-21	latency_hist	09:28:47	7
2052551	99	40	34,5	cyclictest	2202005	-21	latency_hist	08:23:48	7
2052547	99	39	33,6	cyclictest	2559632	-21	kworker/u16:2+events_unbound	11:20:14	6
2052538	99	39	37,2	cyclictest	2606241	-21	kworker/u16:0+events_unbound	11:48:46	4
2052538	99	39	37,2	cyclictest	2336250	-21	kworker/u16:7+events_unbound	11:03:22	4
2052551	99	38	32,5	cyclictest	2400182	-21	latency_hist	09:53:47	7
2052547	99	38	36,2	cyclictest	2336250	-21	kworker/u16:7+events_unbound	11:00:53	6
2052538	99	38	36,2	cyclictest	2559632	-21	kworker/u16:2+flush-8:0	11:13:47	4
2052538	99	38	36,2	cyclictest	2559632	-21	kworker/u16:2+events_unbound	11:22:37	4
2052538	99	38	36,2	cyclictest	2336250	-21	kworker/u16:7+events_unbound	10:11:09	4
2052538	99	38	35,2	cyclictest	2621049	-21	kworker/u16:1+events_unbound	12:21:26	4
2052547	99	37	35,2	cyclictest	2559632	-21	kworker/u16:2+events_unbound	11:18:38	6
2052547	99	37	34,2	cyclictest	2535109	-21	kworker/u16:0+events_unbound	10:56:02	6
2052538	99	37	35,2	cyclictest	2373340	-21	kworker/u16:3+events_unbound	09:47:18	4
2052547	99	36	34,2	cyclictest	2606241	-21	kworker/u16:0+events_unbound	12:11:01	6
2052547	99	36	34,2	cyclictest	2336250	-21	kworker/u16:7+events_unbound	10:50:10	6
2052538	99	36	34,2	cyclictest	2606241	-21	kworker/u16:0+events_unbound	12:09:54	4
2052538	99	36	34,2	cyclictest	2559632	-21	kworker/u16:2+events_unbound	11:06:57	4
2052538	99	36	34,2	cyclictest	2535109	-21	kworker/u16:0+events_unbound	10:49:45	4
2052538	99	36	34,2	cyclictest	2422559	-21	kworker/u16:1+events_unbound	10:41:46	4
2052538	99	36	34,2	cyclictest	2373340	-21	kworker/u16:3+events_unbound	09:51:54	4
2052538	99	36	34,2	cyclictest	2311642	-21	kworker/u16:1+events_unbound	09:32:27	4
2052547	99	35	34,1	cyclictest	2336250	-21	kworker/u16:7+events_unbound	10:30:26	6
2052547	99	35	33,2	cyclictest	2706738	-21	kworker/u16:4+events_unbound	12:05:38	6
2052547	99	35	33,2	cyclictest	2621049	-21	kworker/u16:1+events_unbound	12:25:30	6
2052547	99	35	33,2	cyclictest	2621049	-21	kworker/u16:1+events_unbound	11:31:38	6
2052547	99	35	33,2	cyclictest	2606241	-21	kworker/u16:0+events_unbound	11:45:50	6
2052547	99	35	33,2	cyclictest	2581869	-21	kworker/u16:3+events_unbound	11:09:33	6
2052547	99	35	33,2	cyclictest	2363408	-21	kworker/u16:0+events_unbound	09:59:49	6
2052547	99	35	33,2	cyclictest	2311642	-21	kworker/u16:1+events_unbound	09:21:58	6
2052547	99	35	33,2	cyclictest	2311642	-21	kworker/u16:1+events_unbound	09:21:58	6
2052547	99	35	33,2	cyclictest	2201675	-21	kworker/u16:4+events_unbound	09:11:42	6
2052538	99	35	34,1	cyclictest	2621049	-21	kworker/u16:1+events_unbound	11:31:30	4
2052538	99	35	33,2	cyclictest	2790180	-21	kworker/u16:0+events_unbound	12:34:49	4
2052538	99	35	33,2	cyclictest	2743902	-21	kworker/u16:2+events_unbound	12:28:38	4
2052538	99	35	33,2	cyclictest	2743902	-21	kworker/u16:2+events_unbound	12:17:02	4
2052538	99	35	33,2	cyclictest	2373340	-21	kworker/u16:3+events_unbound	10:00:38	4
2052538	99	35	33,2	cyclictest	2280073	-21	kworker/u16:0+events_unbound	09:16:02	4
2052547	99	34	32,2	cyclictest	2743902	-21	kworker/u16:2+events_unbound	12:31:01	6
2052547	99	34	32,2	cyclictest	2743902	-21	kworker/u16:2+events_unbound	12:15:30	6
2052547	99	34	32,2	cyclictest	2422559	-21	kworker/u16:1+events_unbound	10:46:18	6
2052538	99	34	32,2	cyclictest	2706738	-21	kworker/u16:4+events_unbound	12:06:37	4
2052538	99	34	32,2	cyclictest	2336250	-21	kworker/u16:7+events_unbound	09:57:42	4
2052538	99	34	32,2	cyclictest	2311642	-21	kworker/u16:1+events_unbound	09:20:14	4
2052538	99	34	32,2	cyclictest	2311642	-21	kworker/u16:1+events_unbound	09:20:14	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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