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 Mon Jun 08, 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
3609787	2	58	47,8	sleep5	0	-21	swapper/5	07:06:22	5
3609518	2	58	47,7	sleep4	0	-21	swapper/4	07:02:36	4
3610075	99	48	46,2	cyclictest	3528114	-21	kworker/u16:0+flush-8:0	07:16:48	6
3610083	99	44	39,4	cyclictest	3680920	-21	latency_hist	07:41:22	7
3609750	2	41	4,32	sleep7	0	-21	swapper/7	07:05:52	7
3610075	99	38	36,2	cyclictest	82144	-21	kworker/u16:1+events_unbound	12:24:33	6
3610075	99	38	36,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	10:06:21	6
3610075	99	38	32,6	cyclictest	3868097	-21	kworker/u16:0+events_unbound	09:44:40	6
3610075	99	37	35,2	cyclictest	95288	-21	kworker/u16:2+events_unbound	12:09:48	6
3610075	99	37	35,2	cyclictest	4167042	-21	kworker/u16:1+events_unbound	11:22:36	6
3610075	99	37	35,2	cyclictest	4143322	-21	kworker/u16:2+events_unbound	11:12:17	6
3610075	99	36	34,2	cyclictest	4191177	-21	kworker/u16:2+events_unbound	11:32:13	6
3610075	99	36	34,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	10:50:37	6
3610075	99	36	34,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	10:26:17	6
3610075	99	35	33,2	cyclictest	82144	-21	kworker/u16:1+events_unbound	12:31:12	6
3610075	99	35	33,2	cyclictest	4142164	-21	kworker/u16:0+events_unbound	11:17:53	6
3610075	99	35	33,2	cyclictest	4119119	-21	kworker/u16:3+events_unbound	11:08:57	6
3610066	99	35	33,2	cyclictest	3868097	-21	kworker/u16:0+events_unbound	10:26:37	4
3610075	99	34	32,2	cyclictest	4142164	-21	kworker/u16:0+events_unbound	11:29:17	6
3610075	99	34	32,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	11:38:53	6
3610075	99	34	32,2	cyclictest	3962528	-21	kworker/u16:3+events_unbound	09:55:01	6
3610075	99	34	32,2	cyclictest	3962528	-21	kworker/u16:3+events_unbound	09:55:01	6
3610075	99	34	32,2	cyclictest	3928549	-21	kworker/u16:1+events_unbound	09:57:49	6
3610075	99	34	32,2	cyclictest	3815363	-21	kworker/u16:2+flush-8:0	09:07:14	6
3610075	99	34	32,2	cyclictest	3681304	-21	kworker/u16:1+events_unbound	09:12:25	6
3610075	99	34	32,2	cyclictest	3681304	-21	kworker/u16:1+events_unbound	09:12:25	6
3610075	99	34	32,2	cyclictest	25542	-21	kworker/u16:6+events_unbound	12:18:24	6
3610075	99	34	32,2	cyclictest	25542	-21	kworker/u16:6+events_unbound	12:15:45	6
3610075	99	34	32,2	cyclictest	154592	-21	kworker/u16:2+events_unbound	12:32:48	6
3610075	99	33	31,2	cyclictest	3880524	-21	kworker/u16:3+events_unbound	09:34:45	6
3610075	99	32	30,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	10:59:01	6
3610075	99	32	30,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	10:30:25	6
3610083	99	31	29,1	cyclictest	3844199	-21	diskmemload	10:58:11	7
3610075	99	31	29,2	cyclictest	4085134	-21	kworker/u16:1+events_unbound	10:52:42	6
3610075	99	31	29,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	11:54:41	6
3610075	99	31	29,2	cyclictest	3868097	-21	kworker/u16:0+events_unbound	10:41:12	6
3610075	99	31	29,2	cyclictest	3868097	-21	kworker/u16:0+events_unbound	10:41:12	6
3610075	99	31	29,2	cyclictest	3868097	-21	kworker/u16:0+events_unbound	10:15:09	6
3610075	99	31	29,2	cyclictest	25542	-21	kworker/u16:6+events_unbound	12:05:44	6
3610075	99	31	29,2	cyclictest	2180334	-21	kworker/u16:2+flush-8:0	07:11:27	6
3610070	99	31	28,3	cyclictest	4034856	-21	kworker/u16:2+flush-8:0	10:36:37	5
3610070	99	31	28,3	cyclictest	4034856	-21	kworker/u16:2+flush-8:0	10:36:37	5
3610083	99	30	0,28	cyclictest	635	-21	systemd-journal	07:26:23	7
3610075	99	30	28,2	cyclictest	3973314	-21	kworker/u16:4+events_unbound	10:10:43	6
3610070	99	30	28,2	cyclictest	3528114	-21	kworker/u16:0+flush-8:0	07:56:37	5
3610066	99	30	27,2	cyclictest	2180334	-21	kworker/u16:2+events_unbound	07:26:37	4
3610075	99	29	27,2	cyclictest	25542	-21	kworker/u16:6+events_unbound	12:00:02	6
3610075	99	29	26,2	cyclictest	3528114	-21	kworker/u16:0+events_unbound	07:36:24	6
3610070	99	29	27,2	cyclictest	82144	-21	kworker/u16:1+events_unbound	12:24:51	5
3610070	99	29	27,2	cyclictest	3815363	-21	kworker/u16:2+events_unbound	09:06:37	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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