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 May 10, 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
3789608	2	52	26,8	sleep4	0	-21	swapper/4	07:05:13	4
3790121	99	45	43,2	cyclictest	24978	-21	kworker/u16:3+flush-8:0	11:48:42	6
3790121	99	45	43,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	11:18:44	6
3790121	99	39	37,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	09:31:03	6
3790120	99	39	37,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	09:51:20	5
3790120	99	39	37,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	09:18:03	5
3788881	2	39	3,30	sleep7	0	-21	swapper/7	07:03:48	7
3790121	99	38	36,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	11:32:11	6
3790121	99	38	35,2	cyclictest	4169466	-21	kworker/u16:3+events_unbound	10:13:21	6
3790120	99	38	36,2	cyclictest	24978	-21	kworker/u16:3+events_unbound	11:14:47	5
3790121	99	37	35,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	09:44:20	6
3790121	99	37	35,2	cyclictest	232544	-21	kworker/u16:1+events_unbound	12:29:07	6
3790121	99	37	35,2	cyclictest	232544	-21	kworker/u16:1+events_unbound	12:05:08	6
3790120	99	37	35,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	11:00:31	5
3790122	99	36	30,5	cyclictest	186335	-21	latency_hist	11:33:18	7
3790121	99	36	34,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	09:50:59	6
3790121	99	36	34,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	10:54:59	6
3790120	99	36	34,2	cyclictest	4144845	-21	kworker/u16:1+events_unbound	10:06:43	5
3789552	2	36	25,8	sleep5	0	-21	swapper/5	07:04:26	5
3790121	99	35	33,2	cyclictest	4097969	-21	kworker/u16:1+events_unbound	09:43:00	6
3790121	99	35	33,2	cyclictest	3870877	-21	kworker/u16:0+events_unbound	09:14:03	6
3790121	99	35	33,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	10:21:08	6
3790120	99	35	33,2	cyclictest	4074336	-21	kworker/u16:1+events_unbound	09:29:19	5
3790120	99	35	33,2	cyclictest	4034561	-21	kworker/u16:4+events_unbound	09:55:56	5
3790120	99	35	33,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	10:09:11	5
3790120	99	35	33,2	cyclictest	24978	-21	kworker/u16:3+flush-8:0	12:04:55	5
3790120	99	35	33,2	cyclictest	24978	-21	kworker/u16:3+events_unbound	11:04:43	5
3790120	99	35	33,2	cyclictest	24978	-21	kworker/u16:3+events_unbound	10:50:23	5
3790120	99	35	33,2	cyclictest	11916	-21	kworker/u16:0+flush-8:0	10:40:47	5
3790120	99	35	33,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	11:28:16	5
3790121	99	34	32,2	cyclictest	74441	-21	kworker/u16:1+events_unbound	11:36:11	6
3790121	99	34	32,2	cyclictest	74441	-21	kworker/u16:1+events_unbound	10:49:23	6
3790121	99	34	32,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	10:07:47	6
3790121	99	34	32,2	cyclictest	3870877	-21	kworker/u16:0+events_unbound	09:27:08	6
3790121	99	34	32,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	11:46:03	6
3790121	99	34	32,2	cyclictest	11916	-21	kworker/u16:0+events_unbound	10:38:07	6
3790120	99	34	32,2	cyclictest	3789830	-21	kworker/u16:3+events_unbound	08:08:19	5
3790120	99	34	32,2	cyclictest	24978	-21	kworker/u16:3+events_unbound	10:53:19	5
3790120	99	34	32,2	cyclictest	24978	-21	kworker/u16:3+events_unbound	10:35:15	5
3790120	99	34	32,2	cyclictest	232544	-21	kworker/u16:1+events_unbound	12:26:11	5
3790121	99	33	31,2	cyclictest	74441	-21	kworker/u16:1+events_unbound	11:11:04	6
3790121	99	33	31,2	cyclictest	4144845	-21	kworker/u16:1+events_unbound	10:11:20	6
3790121	99	33	31,2	cyclictest	4034561	-21	kworker/u16:4+events_unbound	09:56:47	6
3790121	99	33	31,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	10:44:20	6
3790121	99	33	31,2	cyclictest	4024579	-21	kworker/u16:2+events_unbound	10:01:24	6
3790121	99	33	31,2	cyclictest	24978	-21	kworker/u16:3+events_unbound	12:22:11	6
3790121	99	33	31,2	cyclictest	232544	-21	kworker/u16:1+events_unbound	12:37:39	6
3790121	99	33	31,2	cyclictest	232544	-21	kworker/u16:1+events_unbound	12:37:39	6
3790121	99	33	30,2	cyclictest	3870877	-21	kworker/u16:0+flush-8:0	09:18:35	6
3790120	99	33	31,2	cyclictest	4123255	-21	kworker/u16:0+flush-8:0	10:01:31	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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