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 Fri Jul 10, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1284667	2	100	0,1	sleep5	0	-21	swapper/5	12:00:03	5
1021253	2	98	0,1	sleep7	1021254	-21	sh	10:13:38	7
928480	2	97	0,1	sleep7	928483	-21	cut	09:35:07	7
768870	2	97	0,1	sleep7	768871	-21	kthreadcore	08:20:07	7
614029	2	83	0,6	chrt	0	-21	swapper/6	07:04:57	6
622985	2	54	19,30	sleep7	0	-21	swapper/7	07:08:04	7
623012	2	46	36,7	sleep5	0	-21	swapper/5	07:08:26	5
623394	99	43	41,2	cyclictest	1302695	-21	kworker/u16:0+events_unbound	12:20:00	6
623394	99	42	39,2	cyclictest	1083121	-21	kworker/u16:2+events_unbound	10:40:00	6
623394	99	40	37,2	cyclictest	785625	-21	kworker/u16:4+events_unbound	08:40:16	6
623389	99	40	38,2	cyclictest	752714	-21	kworker/u16:2+events_unbound	09:33:08	5
623394	99	39	37,2	cyclictest	922506	-21	kworker/u16:1+events_unbound	09:54:03	6
623394	99	39	37,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:01:28	6
623389	99	39	37,2	cyclictest	960017	-21	kworker/u16:2+events_unbound	09:57:53	5
623394	99	38	36,2	cyclictest	969092	-21	kworker/u16:3+events_unbound	10:16:25	6
623394	99	38	36,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	10:24:44	6
623394	99	38	35,2	cyclictest	922506	-21	kworker/u16:1+events_unbound	09:44:59	6
623394	99	38	35,2	cyclictest	922506	-21	kworker/u16:1+events_unbound	09:44:59	6
623389	99	38	36,2	cyclictest	922506	-21	kworker/u16:1+events_unbound	09:48:40	5
623389	99	38	36,2	cyclictest	922506	-21	kworker/u16:1+events_unbound	09:48:40	5
623389	99	38	36,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	10:31:32	5
623394	99	37	35,2	cyclictest	972340	-21	kworker/u16:5+events_unbound	10:00:28	6
623394	99	37	35,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:52:48	6
623394	99	37	35,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:52:48	6
623394	99	37	35,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:36:39	6
623394	99	37	35,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:09:00	6
623394	99	37	35,2	cyclictest	785625	-21	kworker/u16:4+events_unbound	09:25:48	6
623394	99	37	35,2	cyclictest	752714	-21	kworker/u16:2+events_unbound	09:17:28	6
623394	99	37	35,2	cyclictest	752714	-21	kworker/u16:2+events_unbound	09:10:16	6
623394	99	37	35,2	cyclictest	1231668	-21	kworker/u16:1+events_unbound	12:02:52	6
623394	99	37	35,2	cyclictest	1182387	-21	kworker/u16:4+events_unbound	11:34:12	6
623394	99	37	35,2	cyclictest	1009581	-21	kworker/u16:1+events_unbound	10:28:23	6
623394	99	37	35,2	cyclictest	1009581	-21	kworker/u16:1+events_unbound	10:28:23	6
623394	99	37	34,2	cyclictest	1231669	-21	kworker/u16:2+events_unbound	11:55:19	6
623389	99	37	35,2	cyclictest	972340	-21	kworker/u16:5+events_unbound	10:07:04	5
623389	99	37	35,2	cyclictest	969092	-21	kworker/u16:3+events_unbound	10:04:36	5
623389	99	37	35,2	cyclictest	785625	-21	kworker/u16:4+flush-8:0	09:50:00	5
623389	99	37	35,2	cyclictest	1302695	-21	kworker/u16:0+events_unbound	12:22:03	5
623389	99	37	35,2	cyclictest	1105810	-21	kworker/u16:3+events_unbound	11:10:51	5
623394	99	36	34,2	cyclictest	972340	-21	kworker/u16:5+events_unbound	10:09:00	6
623394	99	36	34,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:17:24	6
623394	99	36	34,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:11:48	6
623394	99	36	34,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	10:53:51	6
623394	99	36	34,2	cyclictest	785625	-21	kworker/u16:4+events_unbound	09:22:13	6
623394	99	36	34,2	cyclictest	1302695	-21	kworker/u16:0+events_unbound	12:07:16	6
623394	99	36	34,2	cyclictest	1231668	-21	kworker/u16:1+events_unbound	12:13:43	6
623394	99	36	34,2	cyclictest	1231668	-21	kworker/u16:1+events_unbound	11:49:19	6
623394	99	36	34,2	cyclictest	1009581	-21	kworker/u16:1+events_unbound	10:48:28	6
623394	99	36	34,2	cyclictest	1009581	-21	kworker/u16:1+events_unbound	10:32:27	6
623389	99	36	34,2	cyclictest	895343	-21	kworker/u16:0+events_unbound	11:17:59	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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