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 Sat Jun 13, 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
2314395	2	98	0,1	sleep7	2314393	-21	ssh	10:54:23	7
2314395	2	98	0,1	sleep7	2314393	-21	ssh	10:54:23	7
1815088	2	58	48,7	sleep4	0	-21	swapper/4	07:02:54	4
1815051	2	58	47,8	sleep5	0	-21	swapper/5	07:02:23	5
1815619	99	45	39,5	cyclictest	1886420	-21	latency_hist	07:41:03	7
1815619	99	42	37,4	cyclictest	2267075	-21	latency_hist	10:36:02	7
1815610	99	42	41,1	cyclictest	2144297	-21	kworker/u16:0+flush-8:0	09:46:02	5
1815614	99	40	38,2	cyclictest	2170536	-21	kworker/u16:2+events_unbound	10:53:29	6
1815614	99	40	38,2	cyclictest	2170536	-21	kworker/u16:2+events_unbound	10:53:29	6
1806043	2	39	3,30	sleep7	0	-21	swapper/7	07:01:04	7
1815614	99	38	36,2	cyclictest	2482361	-21	kworker/u16:3+events_unbound	12:13:24	6
1815614	99	38	36,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	11:45:53	6
1815614	99	38	36,2	cyclictest	2204441	-21	kworker/u16:0+events_unbound	10:30:29	6
1815614	99	38	36,2	cyclictest	2170536	-21	kworker/u16:2+events_unbound	10:12:18	6
1815614	99	37	35,2	cyclictest	2482361	-21	kworker/u16:3+events_unbound	12:31:54	6
1815614	99	37	35,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	12:00:34	6
1815614	99	37	35,2	cyclictest	2148134	-21	kworker/u16:4+events_unbound	10:05:49	6
1815614	99	37	35,2	cyclictest	2083983	-21	kworker/u16:0+events_unbound	09:31:28	6
1815614	99	37	35,2	cyclictest	2040331	-21	kworker/u16:5+events_unbound	09:15:38	6
1815619	99	36	34,1	cyclictest	2049906	-21	diskmemload	10:45:20	7
1815619	99	36	0,34	cyclictest	1924532	-21	pool-/usr/libex	07:57:12	7
1815614	99	36	34,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	11:35:00	6
1815614	99	36	34,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	11:35:00	6
1815614	99	36	34,2	cyclictest	2204441	-21	kworker/u16:0+events_unbound	10:23:54	6
1815614	99	36	34,2	cyclictest	2170536	-21	kworker/u16:2+events_unbound	10:48:53	6
1815614	99	36	34,2	cyclictest	2030775	-21	kworker/u16:3+events_unbound	09:07:33	6
1815602	99	36	33,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	12:26:16	4
1815619	99	35	34,0	cyclictest	0	-21	swapper/7	12:03:44	7
1815619	99	35	34,0	cyclictest	0	-21	swapper/7	11:35:20	7
1815619	99	35	34,0	cyclictest	0	-21	swapper/7	11:35:20	7
1815619	99	35	34,0	cyclictest	0	-21	swapper/7	08:06:04	7
1815614	99	35	33,2	cyclictest	2457522	-21	kworker/u16:0+events_unbound	12:02:08	6
1815614	99	35	33,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	12:30:48	6
1815614	99	35	33,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	11:28:24	6
1815614	99	35	33,2	cyclictest	2325056	-21	kworker/u16:3+events_unbound	11:03:44	6
1815614	99	35	33,2	cyclictest	2148134	-21	kworker/u16:4+events_unbound	11:17:33	6
1815614	99	35	33,2	cyclictest	2148134	-21	kworker/u16:4+events_unbound	09:57:33	6
1815614	99	35	33,2	cyclictest	2096662	-21	kworker/u16:2+events_unbound	09:40:49	6
1815614	99	35	32,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	11:36:03	6
1815619	99	34	33,0	cyclictest	0	-21	swapper/7	11:55:33	7
1815619	99	34	33,0	cyclictest	0	-21	swapper/7	11:29:05	7
1815619	99	34	33,0	cyclictest	0	-21	swapper/7	10:22:09	7
1815614	99	34	32,2	cyclictest	2352726	-21	kworker/u16:1+events_unbound	11:48:53	6
1815614	99	34	32,2	cyclictest	2325056	-21	kworker/u16:3+events_unbound	11:23:44	6
1815614	99	34	32,2	cyclictest	2148134	-21	kworker/u16:4+flush-8:0	11:13:25	6
1815614	99	34	32,2	cyclictest	2144297	-21	kworker/u16:0+flush-8:0	09:54:44	6
1815614	99	34	32,2	cyclictest	2083983	-21	kworker/u16:0+flush-8:0	09:30:41	6
1815614	99	34	32,2	cyclictest	2083983	-21	kworker/u16:0+events_unbound	09:24:24	6
1815614	99	34	31,2	cyclictest	2148134	-21	kworker/u16:4+flush-8:0	11:06:05	6
1815602	99	34	30,3	cyclictest	1896214	-21	kworker/u16:1+flush-8:0	07:57:14	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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