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 Dec 21, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
672654	2	96	0,1	sleep7	672655	-21	kthreadcore	19:54:45	7
579290	2	50	15,30	sleep7	0	-21	swapper/7	19:05:50	7
579827	99	49	46,2	cyclictest	602816	-21	kworker/u16:1+flush-8:0	19:19:26	4
6265	89	46	0,39	rtkit-daemon	0	-21	swapper/5	19:06:05	5
579250	2	38	28,7	sleep6	0	-21	swapper/6	19:05:17	6
579278	2	34	23,8	sleep4	0	-21	swapper/4	19:05:39	4
579827	99	31	28,2	cyclictest	708086	-21	kworker/u16:2+flush-8:0	20:34:25	4
579827	99	30	27,2	cyclictest	806272	-21	kworker/u16:1+flush-8:0	23:44:20	4
579838	99	28	25,2	cyclictest	834386	-21	ntpq	21:14:54	7
579833	99	27	24,2	cyclictest	787230	-21	kworker/u16:2+events_unbound	23:14:40	6
579827	99	26	24,2	cyclictest	1135372	-21	kworker/u16:3+flush-8:0	00:09:51	4
579838	99	25	24,0	cyclictest	0	-21	swapper/7	19:14:54	7
579833	99	25	23,2	cyclictest	748989	-21	kworker/u16:1+events_unbound	20:39:20	6
579833	99	25	23,2	cyclictest	748989	-21	kworker/u16:1+events_unbound	20:39:20	6
579833	99	24	22,2	cyclictest	669592	-21	kworker/u16:5+flush-8:0	21:04:21	6
579833	99	24	22,2	cyclictest	669592	-21	kworker/u16:5+events_unbound	20:29:43	6
664699	2	23	0,1	chrt	0	-21	swapper/5	19:49:46	5
579838	99	22	20,1	cyclictest	1116354	-21	idleruntime-cro	23:44:24	7
579833	99	22	20,2	cyclictest	806272	-21	kworker/u16:1+flush-8:0	22:09:20	6
964153	2	21	0,1	chrt	964156	-21	kthreadcore	22:24:44	7
579838	99	21	20,0	cyclictest	0	-21	swapper/7	21:39:49	7
579838	99	21	18,2	cyclictest	839119	-21	grep	21:19:45	7
579838	99	21	15,5	cyclictest	815889	-21	latency_hist	21:09:25	7
579833	99	21	19,2	cyclictest	806272	-21	kworker/u16:1+flush-8:0	22:49:19	6
579833	99	21	19,2	cyclictest	787230	-21	kworker/u16:2+flush-8:0	22:39:20	6
579833	99	21	19,2	cyclictest	748989	-21	kworker/u16:1+events_unbound	20:49:20	6
579833	99	21	18,2	cyclictest	661809	-21	kworker/u16:3+flush-8:0	19:59:36	6
579827	99	21	19,2	cyclictest	1066916	-21	kworker/u16:5+flush-8:0	23:54:56	4
579827	99	21	18,3	cyclictest	787230	-21	kworker/u16:2+flush-8:0	22:44:52	4
579833	99	20	18,2	cyclictest	922896	-21	kworker/u16:5+events_unbound	22:19:43	6
579833	99	20	18,2	cyclictest	1066916	-21	kworker/u16:5+flush-8:0	23:29:20	6
579827	99	20	16,3	cyclictest	979035	-21	kworker/u16:0+flush-8:0	22:39:56	4
910545	2	19	0,1	chrt	910548	-21	kthreadcore	21:54:47	7
579833	99	19	17,2	cyclictest	787230	-21	kworker/u16:2+events_unbound	20:54:48	6
579833	99	19	17,2	cyclictest	1145774	-21	kworker/u16:0+events_unbound	23:59:37	6
579833	99	19	17,2	cyclictest	1019802	-21	kworker/u16:3+events_unbound	22:59:43	6
579827	99	19	17,2	cyclictest	661809	-21	kworker/u16:3+flush-8:0	20:09:52	4
1074478	2	19	0,1	chrt	1074474	-21	kthreadcore	23:19:49	7
764191	2	18	0,0	sleep6	0	-21	swapper/6	20:39:47	6
579838	99	18	18,0	cyclictest	0	-21	swapper/7	21:33:43	7
579838	99	18	14,3	cyclictest	1267	-21	snmpd	22:04:30	7
579838	99	18	12,5	cyclictest	1000054	-21	latency_hist	22:44:25	7
579833	99	18	16,2	cyclictest	979035	-21	kworker/u16:0+flush-8:0	22:34:20	6
579833	99	18	16,2	cyclictest	806272	-21	kworker/u16:1+events_unbound	21:22:37	6
579833	99	18	16,2	cyclictest	787230	-21	kworker/u16:2+flush-8:0	22:44:20	6
579833	99	18	16,2	cyclictest	650909	-21	kworker/u16:1+events_unbound	19:54:48	6
579833	99	18	16,2	cyclictest	1184188	-21	kworker/u16:5+events_unbound	00:24:43	6
579827	99	18	16,2	cyclictest	661809	-21	kworker/u16:3+flush-8:0	19:54:51	4
579838	99	17	2,13	cyclictest	884900	-21	hddtemp_smartct	21:44:40	7
579838	99	17	16,0	cyclictest	0	-21	swapper/7	20:55:35	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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