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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 Jan 09, 2026 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1433210	2	56	46,7	sleep4	0	-21	swapper/4	19:07:57	4
1432928	2	55	21,30	sleep7	0	-21	swapper/7	19:03:59	7
1433550	99	49	44,4	cyclictest	1824695	-21	latency_hist	22:28:10	7
1433550	99	47	40,5	cyclictest	1640591	-21	latency_hist	20:53:10	7
1433550	99	46	40,5	cyclictest	1960184	-21	latency_hist	23:38:10	7
1433203	2	40	29,8	sleep6	0	-21	swapper/6	19:07:51	6
1432926	2	40	29,8	sleep5	0	-21	swapper/5	19:03:57	5
1433541	99	38	34,3	cyclictest	1650454	-21	kworker/u16:0+flush-8:0	21:03:10	5
1433543	99	37	35,2	cyclictest	1592616	-21	kworker/u16:0+events_unbound	20:48:24	6
1433541	99	37	33,3	cyclictest	1843692	-21	kworker/u16:0+flush-8:0	23:18:10	5
1433541	99	36	34,2	cyclictest	1903730	-21	kworker/u16:2+flush-8:0	23:33:05	5
1433543	99	32	30,2	cyclictest	1853852	-21	kworker/u16:1+events_unbound	22:58:23	6
1433536	99	32	28,3	cyclictest	1903730	-21	kworker/u16:2+flush-8:0	23:28:29	4
1433543	99	31	29,2	cyclictest	1524695	-21	kworker/u16:4+events_unbound	19:58:22	6
1433541	99	28	26,2	cyclictest	1690278	-21	kworker/u16:1+events_unbound	21:53:34	5
1433536	99	27	23,3	cyclictest	1671281	-21	kworker/u16:4+flush-8:0	21:20:25	4
1433550	99	26	25,0	cyclictest	0	-21	swapper/7	23:58:25	7
1433541	99	26	23,2	cyclictest	1671281	-21	kworker/u16:4+events_unbound	21:18:24	5
1433543	99	25	23,2	cyclictest	1766248	-21	kworker/u16:3+events_unbound	22:04:04	6
1433541	99	25	21,3	cyclictest	1309853	-21	kworker/u16:1+flush-8:0	19:23:41	5
1433543	99	24	22,2	cyclictest	1671281	-21	kworker/u16:4+events_unbound	21:38:22	6
1433541	99	24	22,2	cyclictest	1766248	-21	kworker/u16:3+events_unbound	22:38:37	5
1433541	99	24	22,2	cyclictest	1403443	-21	kworker/u16:0+events_unbound	19:18:24	5
1433541	99	24	21,2	cyclictest	1582751	-21	kworker/u16:2+flush-8:0	21:08:36	5
1433550	99	23	18,4	cyclictest	650	-21	systemd-journal	20:33:05	7
1433541	99	23	21,2	cyclictest	2037590	-21	kworker/u16:3+flush-8:0	00:28:10	5
1433536	99	23	19,3	cyclictest	1998121	-21	kworker/u16:2+flush-8:0	00:16:01	4
1433550	99	22	21,0	cyclictest	0	-21	swapper/7	22:08:36	7
1433550	99	22	21,0	cyclictest	0	-21	swapper/7	21:33:36	7
1433550	99	22	16,5	cyclictest	1443013	-21	latency_hist	19:13:10	7
1433543	99	22	19,2	cyclictest	1843692	-21	kworker/u16:0+events_unbound	23:48:12	6
1433543	99	21	19,2	cyclictest	1853852	-21	kworker/u16:1+events_unbound	23:58:39	6
1433543	99	21	19,2	cyclictest	1766248	-21	kworker/u16:3+events_unbound	21:58:04	6
1433541	99	21	18,2	cyclictest	1650454	-21	kworker/u16:0+events_unbound	21:13:25	5
1433550	99	20	14,5	cyclictest	1708415	-21	latency_hist	21:28:11	7
1433541	99	20	18,2	cyclictest	1853852	-21	kworker/u16:1+events_unbound	23:48:33	5
1433550	99	19	18,0	cyclictest	0	-21	swapper/7	21:18:26	7
1433550	99	19	16,1	cyclictest	1853848	-21	latency_hist	22:43:10	7
1433550	99	19	14,4	cyclictest	650	-21	systemd-journal	21:43:05	7
1433550	99	19	14,4	cyclictest	1950512	-21	latency_hist	23:33:10	7
1433543	99	19	17,2	cyclictest	1903730	-21	kworker/u16:2+events_unbound	23:28:25	6
1433541	99	19	17,2	cyclictest	1403443	-21	kworker/u16:0+flush-8:0	20:13:41	5
1433541	99	19	17,2	cyclictest	1403443	-21	kworker/u16:0+flush-8:0	20:13:41	5
1433543	99	18	16,2	cyclictest	1805653	-21	kworker/u16:2+events_unbound	22:18:22	6
1433543	99	18	16,2	cyclictest	1523970	-21	kworker/u16:1+events_unbound	20:13:48	6
1433543	99	18	16,2	cyclictest	1523970	-21	kworker/u16:1+events_unbound	20:13:48	6
1433541	99	18	16,2	cyclictest	1853852	-21	kworker/u16:1+flush-8:0	23:38:41	5
1433541	99	18	16,2	cyclictest	1582751	-21	kworker/u16:2+flush-8:0	20:48:36	5
1433541	99	18	16,2	cyclictest	1456743	-21	kworker/u16:3+events_unbound	20:03:33	5
1433541	99	18	16,2	cyclictest	1403443	-21	kworker/u16:0+flush-8:0	20:08:33	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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