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 Jul 16, 2026 00:43:30)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
569322	2	100	0,1	sleep7	569323	-21	grep	00:10:14	7
174601	2	72	0,1	sleep5	0	-21	swapper/5	21:30:08	5
4080147	2	56	45,8	sleep4	0	-21	swapper/4	19:08:10	4
4080244	2	54	19,30	sleep7	0	-21	swapper/7	19:09:34	7
4079949	2	51	40,7	sleep5	0	-21	swapper/5	19:05:31	5
4080555	99	38	35,2	cyclictest	540583	-21	iostat	00:00:06	7
4079957	2	37	27,7	sleep6	0	-21	swapper/6	19:05:32	6
4080549	99	36	34,2	cyclictest	576415	-21	kworker/u16:4+events_unbound	00:30:21	5
503632	2	35	0,1	chrt	0	-21	swapper/4	23:45:03	4
4080555	99	35	34,0	cyclictest	0	-21	swapper/7	23:28:01	7
4080555	99	33	32,0	cyclictest	0	-21	swapper/7	21:47:01	7
4080555	99	33	31,1	cyclictest	478657	-21	ssh	23:35:01	7
4080549	99	33	31,2	cyclictest	230933	-21	kworker/u16:4+events_unbound	23:40:10	5
4080549	99	33	30,2	cyclictest	230933	-21	kworker/u16:4+flush-8:0	22:50:01	5
4080552	99	32	30,2	cyclictest	4181389	-21	kworker/u16:1+events_unbound	20:35:06	6
4080549	99	32	30,2	cyclictest	295368	-21	kworker/u16:2+flush-8:0	22:24:01	5
4080549	99	32	29,2	cyclictest	576415	-21	kworker/u16:4+flush-8:0	00:15:12	5
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	23:43:37	7
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	23:07:02	7
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	22:25:09	7
4080555	99	31	30,0	cyclictest	0	-21	swapper/7	21:13:02	7
4080555	99	31	27,2	cyclictest	585062	-21	ntpq	00:15:17	7
4080555	99	30	29,0	cyclictest	0	-21	swapper/7	22:49:41	7
4080555	99	30	28,1	cyclictest	0	-21	swapper/7	23:31:48	7
4080549	99	30	28,2	cyclictest	394376	-21	kworker/u16:0+events_unbound	23:32:01	5
4080549	99	30	27,2	cyclictest	222316	-21	kworker/u16:2+flush-8:0	21:55:01	5
4080555	99	29	28,0	cyclictest	0	-21	swapper/7	23:04:22	7
4080555	99	29	28,0	cyclictest	0	-21	swapper/7	23:04:22	7
4080555	99	29	28,0	cyclictest	0	-21	swapper/7	21:59:41	7
4080552	99	29	27,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	23:58:36	6
4080549	99	29	27,2	cyclictest	4122870	-21	kworker/u16:0+flush-8:0	19:30:17	5
4080549	99	29	26,2	cyclictest	295368	-21	kworker/u16:2+flush-8:0	22:40:01	5
4080555	99	28	27,0	cyclictest	0	-21	swapper/7	19:40:01	7
4080555	99	28	25,2	cyclictest	561770	-21	ssh	00:06:13	7
4080549	99	28	26,2	cyclictest	85528	-21	kworker/u16:2+events_unbound	21:11:01	5
4080549	99	28	26,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	00:00:51	5
4080549	99	28	26,2	cyclictest	503072	-21	kworker/u16:1+events_unbound	23:54:02	5
4080549	99	28	26,2	cyclictest	158194	-21	kworker/u16:0+events_unbound	21:53:02	5
232647	2	28	0,1	chrt	232646	-21	ssh	21:52:22	7
4080555	99	27	26,0	cyclictest	0	-21	swapper/7	22:37:01	7
4080555	99	27	26,0	cyclictest	0	-21	swapper/7	00:21:00	7
4080555	99	27	25,1	cyclictest	0	-21	swapper/7	22:18:49	7
4080555	99	27	25,1	cyclictest	0	-21	swapper/7	22:12:29	7
4080555	99	27	24,2	cyclictest	64606	-21	/usr/sbin/munin	20:35:14	7
4080552	99	27	25,2	cyclictest	576415	-21	kworker/u16:4+events_unbound	00:32:58	6
4080552	99	27	25,2	cyclictest	197714	-21	kworker/u16:2+events_unbound	21:40:36	6
4080549	99	27	26,1	cyclictest	394376	-21	kworker/u16:0+events_unbound	23:55:21	5
4080549	99	27	25,2	cyclictest	93957	-21	kworker/u16:3+events_unbound	21:05:25	5
4080549	99	27	25,2	cyclictest	535957	-21	kworker/u16:2+events_unbound	00:08:01	5
4080549	99	27	25,2	cyclictest	441765	-21	kworker/u16:2+flush-8:0	23:20:53	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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