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 100 highest latencies:

System rack0slot2.osadl.org (updated Tue May 26, 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
1723471	2	99	0,1	sleep7	1723470	-21	sendmail_mailtr	23:47:44	7
1094362	99	99	96,2	cyclictest	1678123	-21	kworker/u16:1+flush-8:0	23:58:51	6
1093828	2	54	44,7	sleep5	0	-21	swapper/5	19:03:44	5
1094362	99	48	46,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	20:12:46	6
1093854	2	44	33,8	sleep4	0	-21	swapper/4	19:04:07	4
1094357	99	40	38,2	cyclictest	1075335	-21	kworker/u16:2+events_unbound	19:12:32	5
1094357	99	39	37,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	00:17:30	5
1085725	2	39	3,30	sleep7	0	-21	swapper/7	19:02:33	7
1094357	99	38	34,3	cyclictest	1174993	-21	kworker/u16:4+events_unbound	19:57:31	5
1094364	99	37	34,2	cyclictest	1421971	-21	ntp_states	21:42:42	7
1094362	99	37	34,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	23:23:34	6
1094362	99	36	33,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	21:39:03	6
1094047	2	36	26,7	sleep6	0	-21	swapper/6	19:06:50	6
1094364	99	35	29,5	cyclictest	1352629	-21	latency_hist	21:17:16	7
1094364	99	35	29,5	cyclictest	1352629	-21	latency_hist	21:17:16	7
1094362	99	35	33,2	cyclictest	1422596	-21	kworker/u16:1+flush-8:0	22:49:54	6
1094362	99	35	33,2	cyclictest	1349758	-21	kworker/u16:3+events_unbound	21:25:18	6
1094354	99	35	33,2	cyclictest	1126888	-21	kworker/u16:0+events_unbound	19:32:30	4
1094362	99	34	32,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	00:04:11	6
1094362	99	34	32,2	cyclictest	1349758	-21	kworker/u16:3+events_unbound	21:16:15	6
1094362	99	34	32,2	cyclictest	1349758	-21	kworker/u16:3+events_unbound	21:16:15	6
1094357	99	34	32,2	cyclictest	1318919	-21	kworker/u16:2+events_unbound	21:12:42	5
1094357	99	34	32,2	cyclictest	1318919	-21	kworker/u16:2+events_unbound	21:12:42	5
1094357	99	34	32,2	cyclictest	1075335	-21	kworker/u16:2+events_unbound	19:07:41	5
1094357	99	33	31,2	cyclictest	1241297	-21	kworker/u16:1+events_unbound	20:37:41	5
1094362	99	32	30,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	21:51:47	6
1094357	99	32	30,2	cyclictest	1602812	-21	kworker/u16:0+events_unbound	23:02:29	5
1094357	99	32	30,2	cyclictest	1449183	-21	kworker/u16:3+flush-8:0	22:02:42	5
1094354	99	32	30,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	22:27:42	4
1094362	99	31	29,2	cyclictest	1422596	-21	kworker/u16:1+events_unbound	21:56:38	6
1094362	99	31	29,2	cyclictest	1422596	-21	kworker/u16:1+events_unbound	21:56:38	6
1094364	99	30	0,28	cyclictest	827	-21	dbus-daemon	19:22:17	7
1094362	99	30	28,2	cyclictest	1602812	-21	kworker/u16:0+flush-8:0	23:19:46	6
1094362	99	30	28,2	cyclictest	1422596	-21	kworker/u16:1+events_unbound	21:46:54	6
1094362	99	30	28,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	23:04:54	6
1094362	99	30	28,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	21:28:22	6
1094357	99	30	28,2	cyclictest	1241297	-21	kworker/u16:1+events_unbound	20:32:44	5
1094357	99	30	28,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	20:22:46	5
1094354	99	30	28,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:32:43	4
1094354	99	30	28,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:32:43	4
1094354	99	30	28,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	20:57:39	4
1094362	99	29	27,2	cyclictest	1422596	-21	kworker/u16:1+events_unbound	21:59:38	6
1094362	99	29	27,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	21:34:47	6
1094357	99	29	27,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:42:39	5
1094357	99	29	27,2	cyclictest	1241297	-21	kworker/u16:1+events_unbound	20:27:39	5
1094354	99	29	27,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	19:57:45	4
1094354	99	29	27,2	cyclictest	1075334	-21	kworker/u16:1+flush-8:0	19:42:41	4
1094354	99	29	27,2	cyclictest	1075334	-21	kworker/u16:1+flush-8:0	19:42:41	4
1094362	99	28	26,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	23:49:47	6
1094362	99	28	26,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	22:22:14	6
1094362	99	28	26,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:57:03	6
1094362	99	28	26,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:25:47	6
1094357	99	28	26,2	cyclictest	1449183	-21	kworker/u16:3+flush-8:0	22:27:45	5
1094357	99	28	26,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	21:37:48	5
1094354	99	28	26,2	cyclictest	1422596	-21	kworker/u16:1+flush-8:0	22:22:42	4
1094354	99	28	26,2	cyclictest	1401314	-21	kworker/u16:0+events_unbound	21:37:39	4
1094354	99	28	26,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:07:40	4
1094354	99	28	26,2	cyclictest	1349758	-21	kworker/u16:3+events_unbound	21:27:41	4
1094362	99	27	25,2	cyclictest	1833652	-21	kworker/u16:0+events_unbound	00:35:47	6
1094362	99	27	25,2	cyclictest	1786734	-21	kworker/u16:0+events_unbound	00:24:42	6
1094362	99	27	25,2	cyclictest	1678123	-21	kworker/u16:1+flush-8:0	23:52:51	6
1094362	99	27	25,2	cyclictest	1602812	-21	kworker/u16:0+events_unbound	23:00:07	6
1094362	99	27	25,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	23:47:07	6
1094362	99	27	25,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	23:29:22	6
1094362	99	27	25,2	cyclictest	1241297	-21	kworker/u16:1+flush-8:0	20:52:11	6
1094357	99	27	25,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	22:47:29	5
1094357	99	27	24,2	cyclictest	1810785	-21	kworker/u16:1+events_unbound	00:32:35	5
1094354	99	27	25,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	23:52:33	4
1094354	99	27	25,2	cyclictest	1241297	-21	kworker/u16:1+flush-8:0	20:52:29	4
1094354	99	27	25,2	cyclictest	1075334	-21	kworker/u16:1+events_unbound	19:17:31	4
1094362	99	26	24,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	00:28:50	6
1094362	99	26	24,2	cyclictest	1449183	-21	kworker/u16:3+flush-8:0	22:38:59	6
1094362	99	26	24,2	cyclictest	1422596	-21	kworker/u16:1+events_unbound	22:46:26	6
1094354	99	26	24,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	21:52:30	4
1094354	99	26	24,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	21:52:30	4
1094362	99	25	23,2	cyclictest	1678123	-21	kworker/u16:1+events_unbound	23:38:58	6
1094362	99	25	23,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	22:36:30	6
1094362	99	25	23,2	cyclictest	1449183	-21	kworker/u16:3+events_unbound	22:36:30	6
1094362	99	25	23,2	cyclictest	1422596	-21	kworker/u16:1+events_unbound	22:29:43	6
1094362	99	25	23,2	cyclictest	1241297	-21	kworker/u16:1+events_unbound	21:08:55	6
1094362	99	25	23,2	cyclictest	1174993	-21	kworker/u16:4+flush-8:0	19:57:32	6
1094357	99	25	23,2	cyclictest	1075334	-21	kworker/u16:1+events_unbound	19:17:39	5
1094357	99	25	22,2	cyclictest	1449183	-21	kworker/u16:3+flush-8:0	22:37:27	5
1094357	99	25	21,1	cyclictest	68	1	rcuog/4	23:53:04	5
1094354	99	25	23,2	cyclictest	1075334	-21	kworker/u16:1+events_unbound	19:22:42	4
1094362	99	24	22,2	cyclictest	1786734	-21	kworker/u16:0+events_unbound	00:20:46	6
1094362	99	24	22,2	cyclictest	1678123	-21	kworker/u16:1+events_unbound	00:07:34	6
1094362	99	24	22,2	cyclictest	1364773	-21	kworker/u16:2+flush-8:0	23:12:59	6
1094362	99	24	22,2	cyclictest	1174993	-21	kworker/u16:4+flush-8:0	19:52:11	6
1094362	99	24	22,2	cyclictest	1174993	-21	kworker/u16:4+events_unbound	21:02:40	6
1094357	99	24	22,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	00:16:55	5
1094357	99	24	22,2	cyclictest	1690507	-21	kworker/u16:2+events_unbound	00:02:35	5
1094357	99	24	22,2	cyclictest	1203692	-21	kworker/u16:2+events_unbound	20:47:45	5
1094354	99	24	22,2	cyclictest	1690507	-21	kworker/u16:2+flush-8:0	00:17:11	4
1094354	99	24	22,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	23:22:45	4
1094364	99	23	17,5	cyclictest	1203661	-21	latency_hist	20:02:17	7
1094362	99	23	22,1	cyclictest	0	-21	swapper/6	21:20:09	6
1094362	99	23	21,2	cyclictest	1690507	-21	kworker/u16:2+flush-8:0	00:14:02	6
1094362	99	23	21,2	cyclictest	1678123	-21	kworker/u16:1+events_unbound	23:33:55	6
1094362	99	23	21,2	cyclictest	1364773	-21	kworker/u16:2+events_unbound	22:10:11	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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