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 Wed Apr 15, 2026 00:43:49)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1906415	2	51	39,8	sleep5	0	-21	swapper/5	19:09:27	5
1906190	2	41	5,31	sleep7	0	-21	swapper/7	19:06:16	7
1906741	99	39	37,2	cyclictest	2173641	-21	kworker/u16:0+flush-8:0	21:40:00	5
1906160	2	38	26,8	sleep6	0	-21	swapper/6	19:05:51	6
1906741	99	36	33,2	cyclictest	1948873	-21	kworker/u16:1+flush-8:0	19:44:59	5
1906740	99	35	32,2	cyclictest	2015139	-21	kworker/u16:0+flush-8:0	20:29:59	4
1906740	99	35	32,2	cyclictest	2015139	-21	kworker/u16:0+flush-8:0	20:29:59	4
1979392	2	34	0,1	chrt	0	-21	swapper/7	19:45:17	7
1906754	99	34	28,4	cyclictest	1929510	-21	latency_hist	19:20:00	7
1906741	99	34	31,3	cyclictest	1967810	-21	kworker/u16:4+flush-8:0	20:19:59	5
1906741	99	33	31,2	cyclictest	2295919	-21	kworker/u16:1+flush-8:0	22:49:59	5
1906338	2	33	9,8	sleep4	0	-21	swapper/4	19:08:21	4
1906740	99	30	28,2	cyclictest	2572940	-21	kworker/u16:3+events_unbound	00:39:56	4
1906740	99	30	28,2	cyclictest	2452324	-21	kworker/u16:2+events_unbound	23:26:56	4
1906740	99	30	28,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	22:58:44	4
1906740	99	30	28,2	cyclictest	2295919	-21	kworker/u16:1+events_unbound	22:54:49	4
1906740	99	30	28,2	cyclictest	2173641	-21	kworker/u16:0+events_unbound	21:38:15	4
1906740	99	29	27,2	cyclictest	2605545	-21	kworker/u16:2+events_unbound	00:28:08	4
1906740	99	29	27,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	23:14:55	4
1906740	99	29	27,2	cyclictest	2148304	-21	kworker/u16:3+events_unbound	21:44:10	4
1906740	99	29	27,2	cyclictest	2024948	-21	kworker/u16:2+events_unbound	22:21:53	4
1906740	99	29	26,2	cyclictest	2500535	-21	kworker/u16:4+events_unbound	23:45:01	4
1906741	99	28	26,2	cyclictest	2572940	-21	kworker/u16:3+events_unbound	00:25:28	5
1906741	99	28	24,3	cyclictest	2497411	-21	kworker/u16:1+flush-8:0	00:00:16	5
1906740	99	28	26,2	cyclictest	2525408	-21	kworker/u16:2+events_unbound	00:09:56	4
1906740	99	28	26,2	cyclictest	2525408	-21	kworker/u16:2+events_unbound	00:01:57	4
1906740	99	28	26,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	23:18:09	4
1906740	99	28	26,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	23:18:09	4
1906740	99	28	26,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	23:03:29	4
1906740	99	28	26,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	22:33:25	4
1906740	99	28	26,2	cyclictest	2308261	-21	kworker/u16:0+events_unbound	23:06:05	4
1906740	99	28	26,2	cyclictest	2295919	-21	kworker/u16:1+flush-8:0	22:45:09	4
1906740	99	28	26,2	cyclictest	2148304	-21	kworker/u16:3+events_unbound	21:17:57	4
1906740	99	28	26,2	cyclictest	2024948	-21	kworker/u16:2+flush-8:0	22:25:41	4
1906740	99	28	26,2	cyclictest	2024948	-21	kworker/u16:2+events_unbound	21:51:26	4
1906740	99	28	26,2	cyclictest	2024948	-21	kworker/u16:2+events_unbound	21:51:26	4
1906754	99	27	22,4	cyclictest	2608636	-21	latency_hist	00:24:59	7
1906740	99	27	25,2	cyclictest	2308261	-21	kworker/u16:0+events_unbound	22:39:33	4
1906740	99	27	25,2	cyclictest	2259728	-21	kworker/u16:3+events_unbound	22:10:33	4
1906740	99	27	25,2	cyclictest	2259728	-21	kworker/u16:3+events_unbound	22:09:09	4
1906740	99	27	25,2	cyclictest	2024948	-21	kworker/u16:2+events_unbound	22:02:58	4
1906740	99	27	25,2	cyclictest	2024948	-21	kworker/u16:2+events_unbound	21:27:45	4
1906740	99	27	25,2	cyclictest	1887916	-21	kworker/u16:0+flush-8:0	19:10:17	4
1906740	99	27	24,2	cyclictest	2245230	-21	kworker/u16:1+events_unbound	21:56:45	4
1906740	99	27	24,2	cyclictest	2148304	-21	kworker/u16:3+events_unbound	21:30:12	4
1906740	99	26	24,2	cyclictest	2605545	-21	kworker/u16:2+events_unbound	00:24:41	4
1906740	99	26	24,2	cyclictest	2497411	-21	kworker/u16:1+events_unbound	00:32:13	4
1906740	99	26	24,2	cyclictest	2452324	-21	kworker/u16:2+events_unbound	23:36:50	4
1906740	99	26	24,2	cyclictest	2332100	-21	kworker/u16:4+events_unbound	22:41:18	4
1906740	99	26	24,2	cyclictest	2308261	-21	kworker/u16:0+events_unbound	23:42:17	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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