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 Aug 23, 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
2018131	2	76	0,1	sleep7	2018133	-21	tr	11:52:34	7
1375784	2	56	46,7	sleep4	0	-21	swapper/4	07:03:51	4
1375796	2	54	19,30	sleep7	0	-21	swapper/7	07:04:02	7
1376337	99	52	50,2	cyclictest	2091173	-21	kworker/u16:3+events_unbound	12:22:50	6
1376337	99	50	48,2	cyclictest	1929819	-21	kworker/u16:2+events_unbound	12:32:37	6
1376337	99	49	47,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	11:47:38	6
1376337	99	45	42,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	11:42:57	6
1376332	99	45	41,4	cyclictest	1929819	-21	kworker/u16:2+flush-8:0	11:47:23	5
1376328	99	45	43,2	cyclictest	1809835	-21	kworker/u16:3+flush-8:0	10:42:57	4
1376328	99	45	43,2	cyclictest	1809835	-21	kworker/u16:3+flush-8:0	10:42:57	4
1376328	99	45	43,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	10:47:58	4
1376328	99	45	43,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	11:42:56	4
1376036	2	45	35,7	sleep5	0	-21	swapper/5	07:07:21	5
1376339	99	44	38,5	cyclictest	1603934	-21	latency_hist	09:02:23	7
1376337	99	44	41,2	cyclictest	1574799	-21	kworker/u16:3+events_unbound	09:37:46	6
1376337	99	43	42,1	cyclictest	1883160	-21	kworker/u16:3+events_unbound	11:13:00	6
1376337	99	43	41,2	cyclictest	1883160	-21	kworker/u16:3+events_unbound	11:22:45	6
1376337	99	43	41,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	10:52:58	6
1376332	99	42	36,5	cyclictest	1574799	-21	kworker/u16:3+flush-8:0	08:57:23	5
1376337	99	41	39,2	cyclictest	1883160	-21	kworker/u16:3+flush-8:0	12:02:57	6
1376337	99	41	39,2	cyclictest	1883160	-21	kworker/u16:3+flush-8:0	12:02:57	6
1376337	99	41	39,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	11:32:57	6
1376328	99	40	38,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	11:07:58	4
1376328	99	39	37,2	cyclictest	1929819	-21	kworker/u16:2+events_unbound	11:18:29	4
1376328	99	39	37,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	11:32:55	4
1376328	99	37	35,2	cyclictest	1809835	-21	kworker/u16:3+events_unbound	10:28:50	4
1376337	99	36	34,2	cyclictest	1613711	-21	kworker/u16:1+flush-8:0	12:17:39	6
1376328	99	36	34,2	cyclictest	2091173	-21	kworker/u16:3+events_unbound	12:34:14	4
1376328	99	36	34,2	cyclictest	1929819	-21	kworker/u16:2+events_unbound	12:21:46	4
1376328	99	36	34,2	cyclictest	1736202	-21	kworker/u16:0+events_unbound	10:24:46	4
1376337	99	35	33,2	cyclictest	1857691	-21	kworker/u16:0+events_unbound	11:03:00	6
1376337	99	35	33,2	cyclictest	1716558	-21	kworker/u16:2+events_unbound	10:29:10	6
1376332	99	35	32,2	cyclictest	1883160	-21	kworker/u16:3+events_unbound	11:12:41	5
1376328	99	35	33,2	cyclictest	1929819	-21	kworker/u16:2+events_unbound	11:51:46	4
1376337	99	34	32,2	cyclictest	1857691	-21	kworker/u16:0+flush-8:0	10:47:37	6
1376337	99	34	32,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	12:09:29	6
1376337	99	34	32,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	09:46:14	6
1376332	99	34	32,2	cyclictest	1716558	-21	kworker/u16:2+events_unbound	10:57:54	5
1376328	99	34	32,2	cyclictest	2051791	-21	kworker/u16:0+events_unbound	12:10:10	4
1376328	99	34	32,2	cyclictest	1929819	-21	kworker/u16:2+events_unbound	11:13:30	4
1376328	99	34	32,2	cyclictest	1857691	-21	kworker/u16:0+events_unbound	11:00:14	4
1376328	99	34	32,2	cyclictest	1716558	-21	kworker/u16:2+events_unbound	10:12:10	4
1376328	99	34	32,2	cyclictest	1716558	-21	kworker/u16:2+events_unbound	09:49:14	4
1376328	99	34	32,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	11:31:46	4
1376328	99	34	32,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	11:24:05	4
1376328	99	34	32,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	09:45:27	4
1376328	99	34	32,2	cyclictest	1574799	-21	kworker/u16:3+events_unbound	10:01:29	4
1376328	99	34	31,2	cyclictest	1603609	-21	kworker/u16:0+events_unbound	09:32:31	4
1376337	99	33	31,2	cyclictest	1929819	-21	kworker/u16:2+events_unbound	11:41:05	6
1376337	99	33	31,2	cyclictest	1613711	-21	kworker/u16:1+events_unbound	09:51:15	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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