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 Thu Apr 30, 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
917251	2	100	0,1	sleep7	917252	-21	cut	20:19:18	7
1335342	2	94	0,1	sleep7	1335344	-21	grep	00:19:11	7
776870	99	53	51,2	cyclictest	1137640	-21	kworker/u16:0+events_unbound	22:09:25	6
776870	99	51	49,2	cyclictest	790444	-21	kworker/u16:2+events_unbound	19:29:14	6
776870	99	51	49,2	cyclictest	790444	-21	kworker/u16:2+events_unbound	19:29:14	6
776868	99	50	47,2	cyclictest	856158	-21	kworker/u16:1+flush-8:0	19:49:14	5
776870	99	49	47,2	cyclictest	1026401	-21	kworker/u16:0+events_unbound	21:19:29	6
776397	2	47	37,7	sleep5	0	-21	swapper/5	19:06:25	5
776868	99	46	44,2	cyclictest	942466	-21	kworker/u16:5+flush-8:0	21:34:15	5
776868	99	46	44,2	cyclictest	1197897	-21	kworker/u16:1+flush-8:0	23:39:21	5
776868	99	46	43,2	cyclictest	1095245	-21	kworker/u16:2+flush-8:0	22:39:15	5
776870	99	44	42,2	cyclictest	942466	-21	kworker/u16:5+events_unbound	20:44:30	6
776870	99	44	42,2	cyclictest	1026401	-21	kworker/u16:0+events_unbound	21:29:29	6
776868	99	44	42,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	21:59:15	5
776868	99	42	40,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	22:19:17	5
776870	99	41	38,2	cyclictest	798701	-21	kworker/u16:3+events_unbound	19:34:17	6
776492	2	41	30,8	sleep4	0	-21	swapper/4	19:07:45	4
776870	99	40	38,1	cyclictest	1168025	-21	kworker/u16:4+events_unbound	23:29:15	6
776868	99	40	38,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:11:18	5
776868	99	40	38,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:06:13	5
776868	99	40	38,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:06:13	5
776868	99	40	38,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	21:45:50	5
775057	2	40	3,30	sleep7	0	-21	swapper/7	19:04:27	7
776870	99	39	37,2	cyclictest	856158	-21	kworker/u16:1+events_unbound	20:04:13	6
776868	99	39	37,2	cyclictest	1331531	-21	kworker/u16:0+events_unbound	00:20:25	5
776868	99	39	37,2	cyclictest	1318844	-21	kworker/u16:2+events_unbound	00:15:14	5
776868	99	39	37,2	cyclictest	1197897	-21	kworker/u16:1+events_unbound	22:50:41	5
776868	99	39	37,2	cyclictest	1137640	-21	kworker/u16:0+events_unbound	22:37:06	5
776868	99	39	36,2	cyclictest	1095245	-21	kworker/u16:2+flush-8:0	21:56:53	5
776870	99	38	36,2	cyclictest	1304780	-21	kworker/u16:4+flush-8:0	23:59:12	6
776870	99	38	36,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:13:54	6
776868	99	38	36,2	cyclictest	790444	-21	kworker/u16:2+flush-8:0	19:39:24	5
776868	99	38	36,2	cyclictest	1331531	-21	kworker/u16:0+events_unbound	00:34:49	5
776868	99	38	36,2	cyclictest	1168025	-21	kworker/u16:4+events_unbound	23:30:49	5
776868	99	38	36,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:50:41	5
776868	99	38	35,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	22:54:22	5
776870	99	37	35,2	cyclictest	933993	-21	kworker/u16:3+flush-8:0	20:34:17	6
776870	99	37	35,2	cyclictest	898895	-21	kworker/u16:0+events_unbound	20:29:25	6
776870	99	37	35,2	cyclictest	713810	-21	kworker/u16:4+events_unbound	19:15:11	6
776870	99	37	35,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:01:18	6
776870	99	37	35,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	22:55:50	6
776868	99	37	35,2	cyclictest	942466	-21	kworker/u16:5+flush-8:0	21:33:02	5
776868	99	37	35,2	cyclictest	856158	-21	kworker/u16:1+flush-8:0	19:59:28	5
776868	99	37	35,2	cyclictest	1318844	-21	kworker/u16:2+events_unbound	00:12:05	5
776868	99	37	35,2	cyclictest	1197897	-21	kworker/u16:1+events_unbound	23:46:38	5
776868	99	37	35,2	cyclictest	1197897	-21	kworker/u16:1+events_unbound	23:46:38	5
776868	99	37	35,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:23:54	5
776868	99	37	35,2	cyclictest	1000777	-21	kworker/u16:2+flush-8:0	21:04:32	5
776868	99	37	34,2	cyclictest	790444	-21	kworker/u16:2+flush-8:0	19:24:15	5
776868	99	37	34,2	cyclictest	1095245	-21	kworker/u16:2+events_unbound	23:24:14	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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