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 Mon Sep 07, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
914754	2	54	20,29	sleep7	0	-21	swapper/7	19:04:23	7
923939	2	45	35,7	sleep5	0	-21	swapper/5	19:07:58	5
924325	99	41	35,5	cyclictest	1054048	-21	latency_hist	20:14:15	7
923891	2	41	32,6	sleep4	0	-21	swapper/4	19:07:17	4
924315	99	39	37,2	cyclictest	1197343	-21	kworker/u16:3+events_unbound	22:48:57	5
924313	99	39	37,2	cyclictest	1197343	-21	kworker/u16:3+flush-8:0	22:20:12	4
924315	99	38	36,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	23:21:49	5
924313	99	38	36,2	cyclictest	1573806	-21	kworker/u16:4+events_unbound	00:05:44	4
924315	99	37	35,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:27:47	5
924315	99	36	34,2	cyclictest	1583306	-21	kworker/u16:5+events_unbound	00:12:44	5
924315	99	36	34,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:07:37	5
924315	99	36	34,2	cyclictest	1197343	-21	kworker/u16:3+events_unbound	21:51:48	5
924315	99	36	33,2	cyclictest	1141603	-21	kworker/u16:1+events_unbound	21:19:17	5
924315	99	36	33,2	cyclictest	1141603	-21	kworker/u16:1+events_unbound	21:19:17	5
924313	99	36	34,2	cyclictest	1573806	-21	kworker/u16:4+events_unbound	00:03:27	4
924313	99	36	34,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:16:27	4
924313	99	36	34,2	cyclictest	1209583	-21	kworker/u16:5+flush-8:0	21:54:20	4
924313	99	36	34,2	cyclictest	1197343	-21	kworker/u16:3+events_unbound	22:57:16	4
924313	99	36	34,2	cyclictest	1197343	-21	kworker/u16:3+events_unbound	22:46:48	4
924313	99	36	33,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:19:15	4
924325	99	35	34,0	cyclictest	0	-21	swapper/7	22:38:12	7
924325	99	35	34,0	cyclictest	0	-21	swapper/7	00:26:23	7
924315	99	35	33,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	23:55:36	5
924315	99	35	33,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	23:50:43	5
924315	99	35	33,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	23:32:28	5
924315	99	35	33,2	cyclictest	1315919	-21	kworker/u16:4+events_unbound	22:25:36	5
924313	99	35	33,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	23:37:59	4
924313	99	35	33,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:36:11	4
924313	99	35	33,2	cyclictest	1429012	-21	kworker/u16:0+events_unbound	23:07:49	4
924313	99	35	33,2	cyclictest	1209583	-21	kworker/u16:5+events_unbound	21:29:17	4
923836	2	35	25,7	sleep6	0	-21	swapper/6	19:06:31	6
924325	99	34	33,0	cyclictest	0	-21	swapper/7	21:59:17	7
924325	99	34	33,0	cyclictest	0	-21	swapper/7	00:10:47	7
924315	99	34	32,2	cyclictest	1573806	-21	kworker/u16:4+events_unbound	00:20:52	5
924315	99	34	32,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	23:16:01	5
924315	99	34	32,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:31:20	5
924315	99	34	32,2	cyclictest	1464749	-21	kworker/u16:2+events_unbound	00:15:44	5
924315	99	34	32,2	cyclictest	1429012	-21	kworker/u16:0+events_unbound	23:05:40	5
924315	99	34	32,2	cyclictest	1315919	-21	kworker/u16:4+events_unbound	22:11:36	5
924315	99	34	32,2	cyclictest	1305603	-21	kworker/u16:1+events_unbound	23:27:33	5
924315	99	34	32,2	cyclictest	1305603	-21	kworker/u16:1+events_unbound	23:13:04	5
924315	99	34	32,2	cyclictest	1197441	-21	kworker/u16:4+events_unbound	21:38:17	5
924315	99	34	31,2	cyclictest	921521	-21	kworker/u16:2+events_unbound	19:59:16	5
924313	99	34	32,2	cyclictest	1429012	-21	kworker/u16:0+events_unbound	23:02:01	4
924313	99	34	32,2	cyclictest	1315919	-21	kworker/u16:4+events_unbound	22:51:36	4
924313	99	34	32,2	cyclictest	1315919	-21	kworker/u16:4+events_unbound	22:26:05	4
924313	99	34	32,2	cyclictest	1315919	-21	kworker/u16:4+events_unbound	22:13:08	4
924313	99	34	32,2	cyclictest	1160020	-21	kworker/u16:0+events_unbound	21:11:40	4
924325	99	33	32,0	cyclictest	0	-21	swapper/7	21:50:16	7
924315	99	33	31,2	cyclictest	1573806	-21	kworker/u16:4+events_unbound	00:03:56	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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