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 Aug 31, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
6163	89	65	0,61	rtkit-daemon	0	-21	swapper/5	19:09:44	5
6163	89	65	0,61	rtkit-daemon	0	-21	swapper/5	19:09:44	5
83383	2	56	44,8	sleep4	0	-21	swapper/4	19:06:05	4
83383	2	56	44,8	sleep4	0	-21	swapper/4	19:06:05	4
74324	2	54	20,29	sleep7	0	-21	swapper/7	19:04:48	7
74324	2	54	20,29	sleep7	0	-21	swapper/7	19:04:48	7
83926	99	53	47,4	cyclictest	686587	-21	latency_hist	23:39:42	7
83917	99	36	34,2	cyclictest	686979	-21	kworker/u16:4+events_unbound	23:53:40	4
83917	99	36	34,2	cyclictest	479987	-21	kworker/u16:2+events_unbound	23:13:25	4
83917	99	36	34,2	cyclictest	479987	-21	kworker/u16:2+events_unbound	23:07:12	4
83917	99	36	34,2	cyclictest	479987	-21	kworker/u16:2+events_unbound	23:07:12	4
83917	99	36	34,2	cyclictest	443351	-21	kworker/u16:3+events_unbound	22:06:29	4
83917	99	36	34,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	22:45:44	4
83917	99	36	34,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	22:40:49	4
83917	99	36	34,2	cyclictest	345717	-21	kworker/u16:0+events_unbound	21:56:46	4
83917	99	36	34,2	cyclictest	253140	-21	kworker/u16:3+events_unbound	21:17:57	4
83917	99	36	33,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	21:47:41	4
83917	99	36	33,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	21:47:41	4
83917	99	35	33,2	cyclictest	735805	-21	kworker/u16:1+events_unbound	00:34:13	4
83917	99	35	33,2	cyclictest	613865	-21	kworker/u16:3+events_unbound	23:32:05	4
83917	99	35	33,2	cyclictest	613865	-21	kworker/u16:3+events_unbound	00:04:00	4
83917	99	35	33,2	cyclictest	565135	-21	kworker/u16:0+events_unbound	23:03:13	4
83917	99	35	33,2	cyclictest	479987	-21	kworker/u16:2+events_unbound	22:33:33	4
83917	99	35	33,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	21:41:45	4
83917	99	35	33,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	21:41:45	4
83917	99	35	33,2	cyclictest	345717	-21	kworker/u16:0+events_unbound	21:28:14	4
83917	99	35	33,2	cyclictest	300869	-21	kworker/u16:5+events_unbound	21:51:45	4
83917	99	35	33,2	cyclictest	194951	-21	kworker/u16:2+events_unbound	21:22:34	4
83394	2	35	25,7	sleep6	0	-21	swapper/6	19:06:15	6
83394	2	35	25,7	sleep6	0	-21	swapper/6	19:06:15	6
83917	99	34	32,2	cyclictest	565135	-21	kworker/u16:0+events_unbound	23:59:20	4
83917	99	34	32,2	cyclictest	479987	-21	kworker/u16:2+events_unbound	22:53:25	4
83917	99	34	32,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	23:36:05	4
83917	99	34	32,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	22:17:29	4
83922	99	33	31,2	cyclictest	300869	-21	kworker/u16:5+events_unbound	21:49:42	6
83922	99	33	31,2	cyclictest	300869	-21	kworker/u16:5+events_unbound	21:49:42	6
83917	99	33	31,2	cyclictest	735805	-21	kworker/u16:1+events_unbound	00:27:13	4
83917	99	33	31,2	cyclictest	735805	-21	kworker/u16:1+events_unbound	00:27:13	4
83917	99	33	31,2	cyclictest	565135	-21	kworker/u16:0+events_unbound	23:25:20	4
83917	99	33	31,2	cyclictest	565135	-21	kworker/u16:0+events_unbound	23:22:05	4
83917	99	33	31,2	cyclictest	479987	-21	kworker/u16:2+events_unbound	23:18:57	4
83917	99	33	31,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	23:45:45	4
83917	99	33	31,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	23:45:45	4
83917	99	33	31,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	22:36:48	4
83917	99	33	31,2	cyclictest	345718	-21	kworker/u16:1+events_unbound	21:38:05	4
83917	99	33	31,2	cyclictest	345717	-21	kworker/u16:0+events_unbound	22:24:24	4
83917	99	33	31,2	cyclictest	300869	-21	kworker/u16:5+events_unbound	21:30:29	4
83922	99	32	30,2	cyclictest	565135	-21	kworker/u16:0+events_unbound	00:01:08	6
83917	99	32	30,2	cyclictest	735805	-21	kworker/u16:1+events_unbound	00:15:41	4
83917	99	32	30,2	cyclictest	443351	-21	kworker/u16:3+events_unbound	22:59:17	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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