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 Dec 06, 2025 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1425158	2	55	21,29	sleep7	0	-21	swapper/7	03:19:36	7
1425686	99	51	48,2	cyclictest	1763614	-21	kworker/u16:2+flush-8:0	06:32:55	6
1425677	99	50	47,2	cyclictest	2014097	-21	kworker/u16:2+events_unbound	08:42:55	4
1425098	2	50	38,8	sleep4	0	-21	swapper/4	03:18:45	4
1425686	99	49	47,2	cyclictest	1711901	-21	kworker/u16:0+events_unbound	05:43:02	6
1425691	99	48	0,46	cyclictest	1701616	-21	latency_hist	05:37:37	7
1425686	99	48	46,2	cyclictest	1539500	-21	kworker/u16:0+events_unbound	04:22:19	6
1425677	99	48	46,2	cyclictest	1882821	-21	kworker/u16:0+flush-8:0	07:23:06	4
1425677	99	48	46,2	cyclictest	1580532	-21	kworker/u16:4+events_unbound	05:22:38	4
1425691	99	47	41,5	cyclictest	589235	-21	systemd-journal	03:32:37	7
1425677	99	46	44,2	cyclictest	1580532	-21	kworker/u16:4+events_unbound	05:53:06	4
1425686	99	45	43,2	cyclictest	1933089	-21	kworker/u16:4+events_unbound	08:00:19	6
1425677	99	45	41,4	cyclictest	1782560	-21	kworker/u16:4+flush-8:0	07:08:07	4
1425686	99	43	40,2	cyclictest	1892797	-21	kworker/u16:1+events_unbound	07:12:52	6
1425100	2	43	32,7	sleep6	0	-21	swapper/6	03:18:47	6
1425686	99	42	40,2	cyclictest	1782560	-21	kworker/u16:4+events_unbound	06:43:02	6
1425686	99	42	40,2	cyclictest	1600644	-21	kworker/u16:0+flush-8:0	04:48:19	6
1425686	99	41	38,2	cyclictest	1922771	-21	kworker/u16:2+flush-8:0	07:28:05	6
1425677	99	41	39,2	cyclictest	1763614	-21	kworker/u16:2+events_unbound	06:58:55	4
1425686	99	40	38,2	cyclictest	1932937	-21	kworker/u16:3+flush-8:0	07:33:09	6
1425686	99	40	38,2	cyclictest	1763614	-21	kworker/u16:2+flush-8:0	07:03:08	6
1425682	99	40	37,2	cyclictest	1782560	-21	kworker/u16:4+flush-8:0	06:57:50	5
1425691	99	39	34,4	cyclictest	2013700	-21	latency_hist	08:12:37	7
1425686	99	39	37,2	cyclictest	2053061	-21	kworker/u16:4+events_unbound	08:33:01	6
1425677	99	39	37,2	cyclictest	1580532	-21	kworker/u16:4+events_unbound	05:57:55	4
1425691	99	38	0,36	cyclictest	1963363	-21	latency_hist	07:47:37	7
1425686	99	38	36,2	cyclictest	1580532	-21	kworker/u16:4+flush-8:0	04:59:18	6
1425686	99	38	35,2	cyclictest	1993527	-21	kworker/u16:3+events_unbound	08:12:46	6
1425686	99	37	35,2	cyclictest	2053061	-21	kworker/u16:4+events_unbound	08:41:47	6
1425686	99	37	35,2	cyclictest	1600644	-21	kworker/u16:0+events_unbound	05:17:39	6
1425686	99	37	35,2	cyclictest	1339370	-21	kworker/u16:0+events_unbound	03:30:18	6
1425686	99	36	34,2	cyclictest	1751703	-21	kworker/u16:3+events_unbound	06:28:46	6
1425686	99	36	34,2	cyclictest	1650912	-21	kworker/u16:1+events_unbound	05:22:52	6
1425686	99	36	34,2	cyclictest	1580532	-21	kworker/u16:4+events_unbound	05:30:18	6
1425686	99	36	34,2	cyclictest	1425071	-21	kworker/u16:3+flush-8:0	03:48:07	6
1425686	99	36	34,2	cyclictest	1425071	-21	kworker/u16:3+events_unbound	04:33:08	6
1425686	99	35	33,2	cyclictest	1782560	-21	kworker/u16:4+events_unbound	06:55:50	6
1425686	99	35	33,2	cyclictest	1425071	-21	kworker/u16:3+events_unbound	04:01:19	6
1425686	99	35	32,2	cyclictest	1782560	-21	kworker/u16:4+events_unbound	06:22:54	6
1425686	99	34	32,2	cyclictest	1993527	-21	kworker/u16:3+events_unbound	08:23:48	6
1425686	99	34	32,2	cyclictest	1953084	-21	kworker/u16:0+events_unbound	08:08:18	6
1425686	99	34	32,2	cyclictest	1933089	-21	kworker/u16:4+events_unbound	07:48:04	6
1425686	99	34	32,2	cyclictest	1520586	-21	kworker/u16:1+flush-8:0	04:29:39	6
1425686	99	34	32,2	cyclictest	1339370	-21	kworker/u16:0+events_unbound	03:42:35	6
1425686	99	34	31,2	cyclictest	1953084	-21	kworker/u16:0+events_unbound	07:42:46	6
1425677	99	34	31,3	cyclictest	1600644	-21	kworker/u16:0+flush-8:0	05:03:08	4
1425222	2	34	24,7	sleep5	0	-21	swapper/5	03:20:31	5
1425686	99	33	31,2	cyclictest	1872527	-21	kworker/u16:3+events_unbound	07:11:26	6
1425686	99	33	31,2	cyclictest	1763614	-21	kworker/u16:2+flush-8:0	06:17:54	6
1425686	99	33	31,2	cyclictest	1580532	-21	kworker/u16:4+flush-8:0	05:13:04	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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