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 Mar 29, 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
1027794	99	50	48,2	cyclictest	1607568	-21	kworker/u16:1+events_unbound	00:02:54	4
1027404	2	48	38,7	sleep4	0	-21	swapper/4	19:01:18	4
1027349	2	48	38,7	sleep5	0	-21	swapper/5	19:00:31	5
1027794	99	43	41,2	cyclictest	1476278	-21	kworker/u16:3+events_unbound	23:05:11	4
1027794	99	43	41,2	cyclictest	1379116	-21	kworker/u16:4+events_unbound	21:54:40	4
1027794	99	43	41,2	cyclictest	1368630	-21	kworker/u16:2+events_unbound	22:03:59	4
1027794	99	43	41,2	cyclictest	1356652	-21	kworker/u16:3+events_unbound	21:50:28	4
1027794	99	43	41,2	cyclictest	1222440	-21	kworker/u16:0+events_unbound	22:24:24	4
1027794	99	43	41,2	cyclictest	1222440	-21	kworker/u16:0+events_unbound	21:33:20	4
1027802	99	42	40,2	cyclictest	1222440	-21	kworker/u16:0+flush-8:0	21:43:16	6
1027794	99	42	39,2	cyclictest	1222440	-21	kworker/u16:0+events_unbound	21:27:55	4
1027798	99	41	39,2	cyclictest	1667608	-21	kworker/u16:4+events_unbound	00:08:18	5
1027794	99	41	39,2	cyclictest	1629144	-21	kworker/u16:3+events_unbound	23:40:39	4
1027794	99	41	39,2	cyclictest	1557603	-21	kworker/u16:2+events_unbound	00:17:55	4
1027794	99	41	39,2	cyclictest	1476326	-21	kworker/u16:4+events_unbound	22:34:20	4
1027807	99	40	34,5	cyclictest	1193694	-21	latency_hist	20:27:53	7
1027794	99	40	38,2	cyclictest	1691552	-21	kworker/u16:0+events_unbound	00:16:23	4
1027794	99	40	38,2	cyclictest	1667608	-21	kworker/u16:4+events_unbound	00:11:34	4
1027794	99	40	38,2	cyclictest	1629144	-21	kworker/u16:3+events_unbound	23:36:35	4
1027794	99	40	38,2	cyclictest	1607568	-21	kworker/u16:1+events_unbound	23:56:39	4
1027794	99	40	38,2	cyclictest	1557603	-21	kworker/u16:2+flush-8:0	23:58:02	4
1027794	99	40	38,2	cyclictest	1476278	-21	kworker/u16:3+events_unbound	23:09:23	4
1027794	99	40	38,2	cyclictest	1476278	-21	kworker/u16:3+events_unbound	23:09:23	4
1027794	99	40	38,2	cyclictest	1476278	-21	kworker/u16:3+events_unbound	22:46:55	4
1027794	99	40	38,2	cyclictest	1379116	-21	kworker/u16:4+events_unbound	22:10:28	4
1027794	99	40	38,2	cyclictest	1016785	-21	kworker/u16:2+flush-8:0	19:03:24	4
1027794	99	40	37,2	cyclictest	1050523	-21	kworker/u16:3+events_unbound	20:06:24	4
1027246	2	40	3,32	sleep7	0	-21	swapper/7	18:59:05	7
1027798	99	39	37,2	cyclictest	1524304	-21	kworker/u16:0+events_unbound	23:02:52	5
1027794	99	39	37,2	cyclictest	1667608	-21	kworker/u16:4+events_unbound	00:27:06	4
1027794	99	39	37,2	cyclictest	1667608	-21	kworker/u16:4+events_unbound	00:27:06	4
1027794	99	39	37,2	cyclictest	1607568	-21	kworker/u16:1+events_unbound	23:44:00	4
1027794	99	39	37,2	cyclictest	1557603	-21	kworker/u16:2+events_unbound	00:29:58	4
1027794	99	39	37,2	cyclictest	1557603	-21	kworker/u16:2+events_unbound	00:29:58	4
1027794	99	39	37,2	cyclictest	1524304	-21	kworker/u16:0+events_unbound	23:31:55	4
1027794	99	39	37,2	cyclictest	1476326	-21	kworker/u16:4+events_unbound	22:42:11	4
1027794	99	39	37,2	cyclictest	1464024	-21	kworker/u16:2+events_unbound	22:52:19	4
1027794	99	39	37,2	cyclictest	1318061	-21	kworker/u16:1+events_unbound	21:43:35	4
1027794	99	39	37,2	cyclictest	1222440	-21	kworker/u16:0+events_unbound	22:22:31	4
1027794	99	39	37,2	cyclictest	1222440	-21	kworker/u16:0+events_unbound	21:11:23	4
1027794	99	38	36,2	cyclictest	1524304	-21	kworker/u16:0+events_unbound	23:15:32	4
1027794	99	38	36,2	cyclictest	1464024	-21	kworker/u16:2+events_unbound	22:29:11	4
1027794	99	38	36,2	cyclictest	1464024	-21	kworker/u16:2+events_unbound	22:29:11	4
1027794	99	38	35,2	cyclictest	1368630	-21	kworker/u16:2+events_unbound	22:01:58	4
1027802	99	37	35,2	cyclictest	1667608	-21	kworker/u16:4+flush-8:0	23:53:07	6
1027798	99	37	35,2	cyclictest	1464024	-21	kworker/u16:2+events_unbound	22:28:15	5
1027798	99	37	35,2	cyclictest	1464024	-21	kworker/u16:2+events_unbound	22:28:15	5
1027794	99	37	35,2	cyclictest	1524304	-21	kworker/u16:0+events_unbound	23:20:43	4
1027794	99	37	35,2	cyclictest	1270944	-21	kworker/u16:3+events_unbound	21:17:03	4
1027794	99	37	35,2	cyclictest	1241773	-21	kworker/u16:2+events_unbound	21:20:55	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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