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 Thu Aug 27, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2523439	2	92	0,1	sleep5	0	-21	swapper/5	23:50:19	5
1889789	2	50	40,7	sleep5	0	-21	swapper/5	19:07:02	5
1889988	2	42	7,30	sleep7	0	-21	swapper/7	19:09:52	7
1889740	2	40	30,7	sleep4	0	-21	swapper/4	19:06:21	4
1890247	99	29	27,2	cyclictest	2097942	-21	kworker/u16:2+events_unbound	21:28:38	4
1889689	2	27	4,8	sleep6	0	-21	swapper/6	19:05:42	6
1890252	99	25	21,3	cyclictest	2468226	-21	cat	23:29:58	6
1890247	99	23	21,2	cyclictest	2346427	-21	kworker/u16:5+events_unbound	22:52:19	4
1890247	99	23	21,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	21:36:53	4
1890247	99	22	5,6	cyclictest	0	-21	swapper/4	23:25:31	4
1890247	99	22	20,2	cyclictest	2334198	-21	kworker/u16:3+flush-8:0	23:17:29	4
1890247	99	22	20,2	cyclictest	2334198	-21	kworker/u16:3+flush-8:0	23:17:29	4
1890252	99	21	19,2	cyclictest	1888285	-21	kworker/u16:2+flush-8:0	19:44:59	6
1890247	99	21	19,2	cyclictest	2504654	-21	kworker/u16:0+flush-8:0	00:25:19	4
1890247	99	21	19,2	cyclictest	2234061	-21	kworker/u16:0+events_unbound	22:05:05	4
1890247	99	21	19,2	cyclictest	2077617	-21	kworker/u16:4+flush-8:0	21:20:34	4
1890247	99	21	19,2	cyclictest	2077617	-21	kworker/u16:4+flush-8:0	21:20:34	4
1890247	99	21	19,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	22:30:55	4
1890247	99	21	19,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	22:13:45	4
1890247	99	21	19,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	21:16:35	4
1890247	99	21	19,2	cyclictest	2049682	-21	kworker/u16:1+events_unbound	21:44:03	4
1890257	99	20	7,6	cyclictest	6387	-21	gmain	22:10:18	7
1890257	99	20	17,2	cyclictest	1981278	-21	turbostat	19:54:59	7
1890252	99	20	16,3	cyclictest	2321700	-21	latency_hist	22:29:58	6
1890247	99	20	18,2	cyclictest	2613979	-21	kworker/u16:2+events_unbound	00:34:12	4
1890247	99	20	18,2	cyclictest	2456054	-21	kworker/u16:1+flush-8:0	00:20:07	4
1890247	99	20	18,2	cyclictest	2346427	-21	kworker/u16:5+flush-8:0	23:03:09	4
1890247	99	20	18,2	cyclictest	2097942	-21	kworker/u16:2+flush-8:0	21:04:58	4
1890247	99	20	18,2	cyclictest	2049682	-21	kworker/u16:1+events_unbound	22:40:33	4
2638088	2	19	0,1	sleep7	2638087	-21	ssh	00:39:57	7
1890257	99	19	0,17	cyclictest	0	-21	swapper/7	23:05:21	7
1890247	99	19	17,2	cyclictest	2346427	-21	kworker/u16:5+flush-8:0	23:40:26	4
1890247	99	19	17,2	cyclictest	2234061	-21	kworker/u16:0+events_unbound	22:25:31	4
1890247	99	19	17,2	cyclictest	2077617	-21	kworker/u16:4+flush-8:0	20:55:14	4
1890247	99	19	17,2	cyclictest	2065060	-21	kworker/u16:0+events_unbound	20:36:24	4
1890247	99	19	17,2	cyclictest	2049682	-21	kworker/u16:1+events_unbound	20:44:05	4
1890257	99	18	17,0	cyclictest	0	-21	swapper/7	19:24:59	7
1890247	99	18	16,2	cyclictest	2549654	-21	kworker/u16:4+events_unbound	00:07:35	4
1890247	99	18	16,2	cyclictest	2504654	-21	kworker/u16:0+flush-8:0	23:55:27	4
1890247	99	18	16,2	cyclictest	2504654	-21	kworker/u16:0+flush-8:0	00:12:46	4
1890247	99	18	16,2	cyclictest	2456054	-21	kworker/u16:1+events_unbound	23:35:13	4
1890247	99	18	16,2	cyclictest	2456054	-21	kworker/u16:1+events_unbound	23:32:56	4
1890247	99	18	16,2	cyclictest	2428959	-21	kworker/u16:2+events_unbound	23:11:36	4
1890247	99	18	16,2	cyclictest	2234061	-21	kworker/u16:0+events_unbound	22:37:38	4
1890247	99	18	16,2	cyclictest	2187914	-21	kworker/u16:3+flush-8:0	21:45:22	4
1890247	99	18	16,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	22:21:15	4
1890247	99	18	16,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	22:03:20	4
1890247	99	18	16,2	cyclictest	2077617	-21	kworker/u16:4+events_unbound	21:31:05	4
1890247	99	18	16,2	cyclictest	2065060	-21	kworker/u16:0+events_unbound	20:53:45	4
1890247	99	18	16,2	cyclictest	1899052	-21	kworker/u16:4+flush-8:0	19:16:25	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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