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 Mar 27, 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
1162415	99	57	51,5	cyclictest	1565324	-21	latency_hist	10:12:58	7
1161960	2	55	45,7	sleep5	0	-21	swapper/5	07:00:54	5
1161912	2	52	42,7	sleep4	0	-21	swapper/4	07:00:13	4
1162411	99	50	48,2	cyclictest	1328432	-21	kworker/u16:5+flush-8:0	10:08:29	6
1162405	99	50	47,2	cyclictest	1591320	-21	kworker/u16:3+flush-8:0	11:22:59	4
1162411	99	48	46,2	cyclictest	1794763	-21	kworker/u16:2+events_unbound	12:27:05	6
1162411	99	48	46,2	cyclictest	1794763	-21	kworker/u16:2+events_unbound	12:27:05	6
1633597	2	47	0,0	sleep7	1633599	-21	cut	10:38:19	7
1161877	2	47	37,7	sleep6	0	-21	swapper/6	06:59:43	6
1162411	99	46	44,2	cyclictest	1551797	-21	kworker/u16:2+events_unbound	10:40:04	6
1162411	99	46	42,3	cyclictest	430325	-21	kworker/u16:0+flush-8:0	07:32:59	6
1162411	99	46	42,3	cyclictest	430325	-21	kworker/u16:0+flush-8:0	07:32:59	6
1162415	99	45	39,5	cyclictest	1686113	-21	latency_hist	11:02:58	7
1162415	99	45	39,5	cyclictest	1686113	-21	latency_hist	11:02:58	7
1162411	99	45	43,2	cyclictest	1816813	-21	kworker/u16:3+events_unbound	11:55:16	6
1162411	99	45	43,2	cyclictest	1493126	-21	kworker/u16:1+events_unbound	10:03:23	6
1162411	99	44	42,2	cyclictest	1721753	-21	kworker/u16:1+events_unbound	11:52:49	6
1162411	99	43	41,2	cyclictest	1591320	-21	kworker/u16:3+events_unbound	10:52:52	6
1162411	99	43	41,2	cyclictest	1551797	-21	kworker/u16:2+events_unbound	10:21:24	6
1162411	99	43	41,2	cyclictest	1551797	-21	kworker/u16:2+events_unbound	10:21:24	6
1162411	99	42	40,2	cyclictest	1794763	-21	kworker/u16:2+flush-8:0	12:28:32	6
1162411	99	42	40,2	cyclictest	1770777	-21	kworker/u16:0+events_unbound	12:14:25	6
1162411	99	42	40,2	cyclictest	1721753	-21	kworker/u16:1+events_unbound	11:19:13	6
1162411	99	42	40,2	cyclictest	1637937	-21	kworker/u16:0+events_unbound	11:12:48	6
1162411	99	42	40,2	cyclictest	1591320	-21	kworker/u16:3+events_unbound	10:34:49	6
1162411	99	42	40,2	cyclictest	1328432	-21	kworker/u16:5+events_unbound	09:39:29	6
1162411	99	42	40,2	cyclictest	1328432	-21	kworker/u16:5+events_unbound	09:39:29	6
1162411	99	41	39,2	cyclictest	1770777	-21	kworker/u16:0+events_unbound	12:11:16	6
1162411	99	41	39,2	cyclictest	1770777	-21	kworker/u16:0+events_unbound	11:46:52	6
1162411	99	41	39,2	cyclictest	1432563	-21	kworker/u16:0+events_unbound	09:24:41	6
1162411	99	40	38,2	cyclictest	1770777	-21	kworker/u16:0+events_unbound	12:06:34	6
1162411	99	40	38,2	cyclictest	1662311	-21	kworker/u16:2+events_unbound	10:59:48	6
1162411	99	40	38,2	cyclictest	1662311	-21	kworker/u16:2+events_unbound	10:59:48	6
1162411	99	40	38,2	cyclictest	1637937	-21	kworker/u16:0+events_unbound	10:53:05	6
1162411	99	40	38,2	cyclictest	1591320	-21	kworker/u16:3+events_unbound	10:44:12	6
1162411	99	40	38,2	cyclictest	1551797	-21	kworker/u16:2+events_unbound	10:24:16	6
1162411	99	40	38,2	cyclictest	1493126	-21	kworker/u16:1+events_unbound	09:56:09	6
1162411	99	40	38,2	cyclictest	1432563	-21	kworker/u16:0+events_unbound	09:21:34	6
1162411	99	40	38,2	cyclictest	1319358	-21	kworker/u16:3+events_unbound	09:07:49	6
1161887	2	40	4,31	sleep7	0	-21	swapper/7	06:59:52	7
1162415	99	39	38,0	cyclictest	0	-21	swapper/7	12:03:48	7
1162411	99	39	37,2	cyclictest	1830928	-21	kworker/u16:1+events_unbound	12:20:17	6
1162411	99	39	37,2	cyclictest	1816813	-21	kworker/u16:3+events_unbound	12:02:28	6
1162411	99	39	37,2	cyclictest	1721753	-21	kworker/u16:1+events_unbound	11:25:45	6
1162411	99	39	37,2	cyclictest	1591320	-21	kworker/u16:3+events_unbound	11:14:04	6
1162411	99	39	37,2	cyclictest	1493126	-21	kworker/u16:1+events_unbound	10:16:46	6
1162411	99	39	37,2	cyclictest	1493126	-21	kworker/u16:1+events_unbound	10:00:02	6
1162411	99	39	37,2	cyclictest	1444248	-21	kworker/u16:2+events_unbound	09:51:10	6
1162411	99	39	37,2	cyclictest	1432563	-21	kworker/u16:0+events_unbound	09:36:13	6
1162411	99	39	37,2	cyclictest	1357888	-21	kworker/u16:1+events_unbound	09:16:00	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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