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 Apr 15, 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
1031887	2	67	0,1	sleep6	0	-21	swapper/6	11:22:55	6
1031887	2	67	0,1	sleep6	0	-21	swapper/6	11:22:55	6
973345	2	65	0,1	sleep7	973346	-21	sh	11:00:13	7
469252	2	58	48,7	sleep4	0	-21	swapper/4	07:07:08	4
469757	99	48	43,4	cyclictest	996608	-21	latency_hist	11:09:57	7
469757	99	41	37,3	cyclictest	715237	-21	latency_hist	09:14:57	7
468528	2	41	3,31	sleep7	0	-21	swapper/7	07:05:27	7
469757	99	40	35,4	cyclictest	862046	-21	latency_hist	10:14:57	7
469752	99	39	36,2	cyclictest	935791	-21	kworker/u16:0+events_unbound	10:49:59	5
469752	99	36	34,2	cyclictest	935791	-21	kworker/u16:0+events_unbound	11:00:58	5
469757	99	34	28,5	cyclictest	664666	-21	latency_hist	08:49:57	7
469752	99	34	32,2	cyclictest	540495	-21	kworker/u16:3+events_unbound	09:29:59	5
469752	99	32	30,2	cyclictest	883938	-21	kworker/u16:1+events_unbound	10:35:22	5
1188699	2	31	0,1	chrt	1188700	-21	sh	12:25:31	7
1069254	2	31	0,1	chrt	1069255	-21	sh	11:39:39	7
469209	2	30	19,7	sleep6	0	-21	swapper/6	07:06:30	6
469757	99	29	24,4	cyclictest	1057267	-21	latency_hist	11:34:57	7
469752	99	29	27,2	cyclictest	995344	-21	kworker/u16:1+flush-8:0	11:10:17	5
469752	99	29	25,3	cyclictest	664339	-21	kworker/u16:0+events_unbound	09:40:09	5
469208	2	29	17,9	sleep5	0	-21	swapper/5	07:06:29	5
469752	99	28	26,2	cyclictest	935791	-21	kworker/u16:0+flush-8:0	10:47:58	5
469752	99	28	26,2	cyclictest	1176735	-21	kworker/u16:0+events_unbound	12:34:52	5
469752	99	28	25,2	cyclictest	727926	-21	kworker/u16:1+events_unbound	10:00:50	5
469757	99	27	26,0	cyclictest	0	-21	swapper/7	11:29:11	7
469757	99	27	25,1	cyclictest	0	-21	swapper/7	10:51:39	7
469757	99	27	21,5	cyclictest	635	-21	systemd-journal	10:34:56	7
469752	99	27	25,2	cyclictest	764571	-21	kworker/u16:2+events_unbound	09:54:52	5
469752	99	27	25,2	cyclictest	478222	-21	kworker/u16:2+flush-8:0	07:29:58	5
469752	99	27	24,2	cyclictest	664339	-21	kworker/u16:0+events_unbound	09:20:11	5
469752	99	27	24,2	cyclictest	1009282	-21	kworker/u16:0+flush-8:0	11:49:58	5
469757	99	26	23,2	cyclictest	1104705	-21	ssh	11:52:55	7
469752	99	26	24,2	cyclictest	947760	-21	kworker/u16:3+flush-8:0	12:05:26	5
469752	99	26	24,2	cyclictest	935791	-21	kworker/u16:0+events_unbound	11:06:30	5
469752	99	26	24,2	cyclictest	883938	-21	kworker/u16:1+events_unbound	10:33:07	5
469752	99	26	24,2	cyclictest	727926	-21	kworker/u16:1+flush-8:0	10:10:31	5
469752	99	26	24,2	cyclictest	664339	-21	kworker/u16:0+flush-8:0	09:45:00	5
469752	99	26	24,2	cyclictest	664339	-21	kworker/u16:0+flush-8:0	09:15:20	5
469752	99	26	24,2	cyclictest	664339	-21	kworker/u16:0+flush-8:0	09:15:20	5
469752	99	26	24,2	cyclictest	1176735	-21	kworker/u16:0+events_unbound	12:26:06	5
469757	99	25	24,0	cyclictest	0	-21	swapper/7	12:08:25	7
469757	99	25	24,0	cyclictest	0	-21	swapper/7	11:13:18	7
469757	99	25	24,0	cyclictest	0	-21	swapper/7	09:29:43	7
469757	99	25	23,1	cyclictest	1116794	-21	ssh	11:57:51	7
469757	99	25	23,1	cyclictest	0	-21	swapper/7	09:33:19	7
469757	99	25	22,2	cyclictest	787689	-21	ssh	09:43:11	7
469752	99	25	23,2	cyclictest	727926	-21	kworker/u16:1+flush-8:0	09:55:02	5
469752	99	25	22,2	cyclictest	822143	-21	kworker/u16:4+events_unbound	10:15:00	5
469757	99	24	23,0	cyclictest	0	-21	swapper/7	12:31:37	7
469757	99	24	23,0	cyclictest	0	-21	swapper/7	12:13:02	7
469757	99	24	23,0	cyclictest	0	-21	swapper/7	12:02:59	7
469757	99	24	23,0	cyclictest	0	-21	swapper/7	12:02:59	7
469757	99	24	23,0	cyclictest	0	-21	swapper/7	10:45:53	7
469757	99	24	23,0	cyclictest	0	-21	swapper/7	10:16:18	7
469757	99	24	23,0	cyclictest	0	-21	swapper/7	09:38:46	7
469752	99	24	22,2	cyclictest	947760	-21	kworker/u16:3+flush-8:0	11:42:02	5
469752	99	24	22,2	cyclictest	947760	-21	kworker/u16:3+events_unbound	11:45:27	5
469752	99	24	22,2	cyclictest	947760	-21	kworker/u16:3+events_unbound	11:37:46	5
469752	99	24	22,2	cyclictest	664339	-21	kworker/u16:0+events_unbound	10:09:36	5
469752	99	24	22,2	cyclictest	1033054	-21	kworker/u16:2+events_unbound	11:29:14	5
469752	99	24	22,2	cyclictest	1009282	-21	kworker/u16:0+flush-8:0	11:24:07	5
469752	99	24	22,2	cyclictest	1009282	-21	kworker/u16:0+flush-8:0	11:24:07	5
469757	99	23	22,0	cyclictest	0	-21	swapper/7	08:21:51	7
469757	99	23	22,0	cyclictest	0	-21	swapper/7	08:08:16	7
469757	99	23	22,0	cyclictest	0	-21	swapper/7	07:44:12	7
469752	99	23	21,2	cyclictest	540495	-21	kworker/u16:3+flush-8:0	09:26:03	5
469757	99	22	21,0	cyclictest	0	-21	swapper/7	11:22:33	7
469757	99	22	21,0	cyclictest	0	-21	swapper/7	11:22:33	7
469757	99	22	21,0	cyclictest	0	-21	swapper/7	11:17:05	7
469757	99	22	21,0	cyclictest	0	-21	swapper/7	07:11:47	7
469752	99	22	20,2	cyclictest	886626	-21	kworker/u16:2+events_unbound	10:56:08	5
469752	99	22	20,2	cyclictest	883938	-21	kworker/u16:1+events_unbound	10:24:44	5
469752	99	22	20,2	cyclictest	862473	-21	kworker/u16:3+flush-8:0	10:29:07	5
469752	99	22	20,2	cyclictest	636373	-21	kworker/u16:1+flush-8:0	08:45:15	5
469752	99	22	20,2	cyclictest	1176735	-21	kworker/u16:0+flush-8:0	12:35:18	5
469757	99	21	20,0	cyclictest	0	-21	swapper/7	09:22:33	7
469757	99	21	20,0	cyclictest	0	-21	swapper/7	08:28:20	7
469757	99	21	20,0	cyclictest	0	-21	swapper/7	08:02:44	7
469757	99	21	15,5	cyclictest	511620	-21	latency_hist	07:29:58	7
469755	99	21	16,4	cyclictest	982017	-21	packagekitd	11:00:59	6
469752	99	21	19,2	cyclictest	886626	-21	kworker/u16:2+events_unbound	10:40:19	5
469752	99	21	19,2	cyclictest	540495	-21	kworker/u16:3+events_unbound	09:35:10	5
469752	99	21	19,2	cyclictest	540495	-21	kworker/u16:3+events_unbound	09:14:47	5
469752	99	21	19,2	cyclictest	1130559	-21	kworker/u16:4+flush-8:0	12:13:59	5
469752	99	21	19,2	cyclictest	1115606	-21	kworker/u16:2+events_unbound	12:01:01	5
469752	99	21	19,2	cyclictest	1115606	-21	kworker/u16:2+events_unbound	12:01:01	5
469752	99	21	18,2	cyclictest	1009282	-21	kworker/u16:0+events_unbound	11:15:06	5
469757	99	20	19,0	cyclictest	0	-21	swapper/7	12:20:03	7
469757	99	20	19,0	cyclictest	0	-21	swapper/7	10:58:49	7
469757	99	20	19,0	cyclictest	0	-21	swapper/7	09:16:53	7
469757	99	20	19,0	cyclictest	0	-21	swapper/7	09:16:53	7
469757	99	20	19,0	cyclictest	0	-21	swapper/7	09:02:32	7
469757	99	20	19,0	cyclictest	0	-21	swapper/7	07:32:44	7
469757	99	20	19,0	cyclictest	0	-21	swapper/7	07:19:23	7
469752	99	20	18,2	cyclictest	947760	-21	kworker/u16:3+events_unbound	12:22:06	5
469757	99	19	18,0	cyclictest	0	-21	swapper/7	10:35:05	7
469752	99	19	17,2	cyclictest	636373	-21	kworker/u16:1+flush-8:0	09:05:21	5
469757	99	18	17,0	cyclictest	0	-21	swapper/7	10:27:33	7
469757	99	18	17,0	cyclictest	0	-21	swapper/7	08:56:44	7
469757	99	18	17,0	cyclictest	0	-21	swapper/7	08:50:44	7
469757	99	18	16,1	cyclictest	0	-21	swapper/7	09:45:45	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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