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 Wed May 20, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
150802	2	49	38,7	sleep4	0	-21	swapper/4	07:02:50	4
159693	2	47	36,8	sleep5	0	-21	swapper/5	07:03:47	5
159695	2	40	4,30	sleep7	0	-21	swapper/7	07:03:49	7
160292	99	39	34,4	cyclictest	528266	-21	latency_hist	10:02:39	7
160290	99	39	37,2	cyclictest	552606	-21	kworker/u16:4+flush-8:0	12:07:33	6
160290	99	39	37,2	cyclictest	279059	-21	kworker/u16:2+flush-8:0	08:27:38	6
160284	99	38	36,2	cyclictest	552606	-21	kworker/u16:4+events_unbound	11:54:13	4
160284	99	38	36,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	10:04:37	4
160284	99	37	35,2	cyclictest	804578	-21	kworker/u16:3+events_unbound	12:02:41	4
160284	99	37	35,2	cyclictest	601545	-21	kworker/u16:1+events_unbound	10:50:09	4
160284	99	37	35,2	cyclictest	601545	-21	kworker/u16:1+events_unbound	10:50:09	4
160284	99	37	34,2	cyclictest	327143	-21	kworker/u16:3+flush-8:0	10:22:38	4
160292	99	36	0,34	cyclictest	16030	-21	sshd	09:57:38	7
160284	99	36	34,2	cyclictest	804578	-21	kworker/u16:3+events_unbound	11:59:53	4
160284	99	36	34,2	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:37:08	4
160284	99	35	33,2	cyclictest	842317	-21	kworker/u16:0+events_unbound	12:25:33	4
160284	99	35	33,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	11:50:13	4
160284	99	35	33,2	cyclictest	601545	-21	kworker/u16:1+flush-8:0	10:53:12	4
160284	99	35	33,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	09:57:41	4
160284	99	35	33,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	09:53:29	4
160290	99	34	32,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	12:22:32	6
160284	99	34	33,1	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:47:41	4
160284	99	34	32,2	cyclictest	732139	-21	kworker/u16:1+events_unbound	11:31:37	4
160284	99	34	32,2	cyclictest	659493	-21	kworker/u16:2+events_unbound	11:00:37	4
160284	99	34	32,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	11:21:57	4
160284	99	34	32,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	10:32:10	4
160284	99	34	32,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	09:30:49	4
160284	99	34	32,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	09:30:49	4
160290	99	33	31,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	09:47:21	6
160285	99	33	29,3	cyclictest	577317	-21	munin-node	10:22:49	5
160284	99	33	31,2	cyclictest	804578	-21	kworker/u16:3+events_unbound	12:08:45	4
160284	99	33	31,2	cyclictest	759416	-21	kworker/u16:1+events_unbound	11:43:13	4
160284	99	33	31,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	12:30:21	4
160284	99	33	31,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	12:18:45	4
160290	99	32	30,2	cyclictest	552606	-21	kworker/u16:4+flush-8:0	11:42:38	6
160290	99	32	29,2	cyclictest	842317	-21	kworker/u16:0+flush-8:0	12:12:48	6
160285	99	32	30,2	cyclictest	212259	-21	kworker/u16:1+flush-8:0	09:57:57	5
160284	99	32	30,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	11:26:01	4
160284	99	32	30,2	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:41:53	4
160284	99	32	30,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	10:27:37	4
160284	99	32	30,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	09:25:01	4
160284	99	32	30,2	cyclictest	160190	-21	kworker/u16:2+events_unbound	07:58:42	4
160290	99	31	29,2	cyclictest	2921828	-21	kworker/u16:4+events_unbound	07:23:02	6
160284	99	31	29,2	cyclictest	659493	-21	kworker/u16:2+events_unbound	11:09:05	4
160284	99	31	29,2	cyclictest	601545	-21	kworker/u16:1+flush-8:0	10:33:20	4
160284	99	31	29,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	10:39:30	4
160284	99	31	29,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	10:10:17	4
160284	99	31	29,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	10:10:17	4
160290	99	30	28,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	08:52:38	6
160284	99	30	28,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	11:04:41	4
160284	99	30	28,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	10:15:14	4
160284	99	30	28,2	cyclictest	375465	-21	kworker/u16:2+flush-8:0	09:18:37	4
160284	99	30	28,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	09:47:25	4
160290	99	29	27,2	cyclictest	552606	-21	kworker/u16:4+events_unbound	11:17:54	6
160285	99	29	26,2	cyclictest	111168	-21	kworker/u16:0+flush-8:0	08:02:57	5
160285	99	29	26,2	cyclictest	111168	-21	kworker/u16:0+flush-8:0	08:02:57	5
160284	99	29	27,2	cyclictest	842317	-21	kworker/u16:0+flush-8:0	12:15:36	4
160284	99	29	27,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	12:33:44	4
160284	99	29	27,2	cyclictest	552606	-21	kworker/u16:4+events_unbound	11:38:16	4
160284	99	29	27,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	10:46:05	4
160284	99	29	26,3	cyclictest	744336	-21	kworker/u16:2+flush-8:0	11:33:12	4
160290	99	28	26,2	cyclictest	513688	-21	kworker/u16:0+flush-8:0	10:27:38	6
160285	99	28	26,2	cyclictest	513688	-21	kworker/u16:0+events_unbound	11:22:53	5
160284	99	28	26,2	cyclictest	513688	-21	kworker/u16:0+flush-8:0	11:13:29	4
160284	99	28	26,2	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:09:50	4
160284	99	28	26,2	cyclictest	212259	-21	kworker/u16:1+flush-8:0	09:14:01	4
160292	99	27	12,14	cyclictest	394667	-21	diskmemload	10:32:58	7
160284	99	27	25,2	cyclictest	308212	-21	kworker/u16:0+events_unbound	08:29:21	4
160285	99	26	24,2	cyclictest	279059	-21	kworker/u16:2+events_unbound	08:22:56	5
160285	99	26	23,3	cyclictest	269306	-21	kworker/u16:5+events_unbound	07:59:11	5
160284	99	26	24,2	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:07:20	4
160290	99	25	24,1	cyclictest	375465	-21	kworker/u16:2+flush-8:0	09:18:04	6
160285	99	25	23,2	cyclictest	552606	-21	kworker/u16:4+flush-8:0	10:53:16	5
159931	2	25	15,7	sleep6	0	-21	swapper/6	07:07:09	6
160292	99	24	18,5	cyclictest	183138	-21	latency_hist	07:17:38	7
160290	99	24	22,2	cyclictest	375465	-21	kworker/u16:2+flush-8:0	09:52:56	6
160290	99	24	21,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	12:32:32	6
160285	99	24	23,1	cyclictest	327143	-21	kworker/u16:3+events_unbound	10:28:14	5
160285	99	24	22,2	cyclictest	744336	-21	kworker/u16:2+events_unbound	11:53:05	5
160285	99	24	21,3	cyclictest	513688	-21	kworker/u16:0+flush-8:0	10:13:01	5
160292	99	23	15,7	cyclictest	375428	-21	latency_hist	08:57:38	7
160290	99	23	21,2	cyclictest	212259	-21	kworker/u16:1+events_unbound	07:47:59	6
160285	99	23	19,3	cyclictest	552606	-21	kworker/u16:4+flush-8:0	11:32:44	5
160284	99	23	21,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	08:47:20	4
160290	99	22	20,2	cyclictest	601545	-21	kworker/u16:1+events_unbound	10:42:59	6
160290	99	22	20,2	cyclictest	513688	-21	kworker/u16:0+flush-8:0	09:57:44	6
160290	99	22	19,2	cyclictest	659493	-21	kworker/u16:2+events_unbound	11:02:40	6
160285	99	22	20,2	cyclictest	601545	-21	kworker/u16:1+events_unbound	10:38:04	5
160285	99	22	19,3	cyclictest	279059	-21	kworker/u16:2+events_unbound	08:17:53	5
160284	99	22	20,2	cyclictest	2921828	-21	kworker/u16:4+events_unbound	07:30:49	4
160290	99	21	19,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	10:18:02	6
160285	99	21	19,2	cyclictest	327143	-21	kworker/u16:3+flush-8:0	09:12:54	5
160285	99	21	19,2	cyclictest	327143	-21	kworker/u16:3+flush-8:0	08:37:54	5
160285	99	21	19,2	cyclictest	212259	-21	kworker/u16:1+flush-8:0	07:32:57	5
160284	99	21	19,2	cyclictest	160190	-21	kworker/u16:2+flush-8:0	07:22:54	4
160290	99	20	19,1	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:39:30	6
160290	99	20	18,2	cyclictest	375465	-21	kworker/u16:2+flush-8:0	09:03:08	6
160290	99	20	18,2	cyclictest	375465	-21	kworker/u16:2+events_unbound	09:50:45	6
160285	99	20	18,2	cyclictest	327143	-21	kworker/u16:3+events_unbound	09:53:03	5
160285	99	20	17,2	cyclictest	601545	-21	kworker/u16:1+flush-8:0	10:32:52	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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