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 Fri May 01, 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
402242	2	51	40,8	sleep4	0	-21	swapper/4	07:08:41	4
401966	2	50	39,8	sleep5	0	-21	swapper/5	07:04:49	5
402534	99	44	42,2	cyclictest	912778	-21	kworker/u16:0+events_unbound	11:01:14	5
402530	99	44	41,2	cyclictest	818536	-21	kworker/u16:2+events_unbound	10:28:55	4
402534	99	41	39,2	cyclictest	891163	-21	kworker/u16:2+events_unbound	11:59:55	5
402530	99	41	39,2	cyclictest	670057	-21	kworker/u16:0+events_unbound	09:23:56	4
402530	99	41	38,2	cyclictest	891163	-21	kworker/u16:2+events_unbound	11:18:55	4
393095	2	41	3,31	sleep7	0	-21	swapper/7	07:04:03	7
402534	99	40	38,2	cyclictest	559685	-21	kworker/u16:3+events_unbound	09:58:00	5
402534	99	39	37,2	cyclictest	626712	-21	kworker/u16:2+events_unbound	09:15:55	5
402534	99	39	37,2	cyclictest	364323	-21	kworker/u16:1+events_unbound	07:23:53	5
402534	99	38	36,2	cyclictest	1085446	-21	kworker/u16:0+events_unbound	12:33:55	5
402530	99	38	36,2	cyclictest	912778	-21	kworker/u16:0+events_unbound	11:26:03	4
402534	99	37	35,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	11:45:35	5
402534	99	37	35,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	11:45:35	5
402534	99	37	35,2	cyclictest	891163	-21	kworker/u16:2+events_unbound	11:30:03	5
402534	99	37	35,2	cyclictest	757585	-21	kworker/u16:0+flush-8:0	10:14:51	5
402534	99	37	35,2	cyclictest	742922	-21	kworker/u16:1+events_unbound	09:50:03	5
402534	99	37	35,2	cyclictest	1085446	-21	kworker/u16:0+events_unbound	12:17:07	5
402530	99	37	35,2	cyclictest	839947	-21	kworker/u16:4+flush-8:0	10:38:59	4
402530	99	37	35,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	11:31:27	4
402539	99	36	34,1	cyclictest	540394	-21	perf	08:18:53	7
402539	99	36	33,2	cyclictest	412018	-21	munin-run	07:13:54	7
402534	99	36	34,2	cyclictest	742922	-21	kworker/u16:1+events_unbound	10:23:36	5
402534	99	36	34,2	cyclictest	742922	-21	kworker/u16:1+events_unbound	10:23:36	5
402530	99	36	34,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	10:57:11	4
402530	99	36	34,2	cyclictest	1086776	-21	kworker/u16:3+events_unbound	12:28:31	4
402536	99	35	33,2	cyclictest	976047	-21	kworker/u16:1+flush-8:0	11:54:19	6
402534	99	35	33,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	12:06:12	5
402534	99	35	33,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	11:58:02	5
402534	99	35	33,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	11:38:59	5
402534	99	35	33,2	cyclictest	912778	-21	kworker/u16:0+events_unbound	11:07:48	5
402534	99	35	33,2	cyclictest	742922	-21	kworker/u16:1+flush-8:0	10:24:51	5
402534	99	35	33,2	cyclictest	670057	-21	kworker/u16:0+flush-8:0	09:48:19	5
402534	99	35	33,2	cyclictest	616923	-21	kworker/u16:1+flush-8:0	09:09:35	5
402534	99	35	33,2	cyclictest	559685	-21	kworker/u16:3+events_unbound	10:30:52	5
402534	99	35	32,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	10:57:07	5
402530	99	35	33,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	12:36:47	4
402530	99	35	33,2	cyclictest	559685	-21	kworker/u16:3+events_unbound	09:57:31	4
402534	99	34	32,2	cyclictest	891163	-21	kworker/u16:2+events_unbound	12:11:31	5
402534	99	34	32,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	10:50:03	5
402534	99	34	32,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	10:38:43	5
402534	99	34	32,2	cyclictest	757585	-21	kworker/u16:0+events_unbound	10:01:04	5
402534	99	34	31,2	cyclictest	1086776	-21	kworker/u16:3+events_unbound	12:19:04	5
402530	99	34	32,2	cyclictest	976047	-21	kworker/u16:1+events_unbound	11:52:30	4
402530	99	34	32,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	11:38:35	4
402530	99	34	32,2	cyclictest	757585	-21	kworker/u16:0+events_unbound	10:06:23	4
402539	99	33	28,4	cyclictest	745334	-21	latency_hist	09:53:54	7
402534	99	33	31,2	cyclictest	891163	-21	kworker/u16:2+events_unbound	11:15:55	5
402534	99	33	31,2	cyclictest	839947	-21	kworker/u16:4+events_unbound	10:42:55	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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