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 100 highest latencies:

System rack0slot2.osadl.org (updated Tue Jun 09, 2026 00:43:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2714604	2	94	0,1	sleep7	2714605	-21	sh	23:20:21	7
2155631	2	52	28,7	sleep4	0	-21	swapper/4	19:06:09	4
2155518	2	42	32,7	sleep5	0	-21	swapper/5	19:04:34	5
2155950	99	41	38,2	cyclictest	2188380	-21	kworker/u16:1+events_unbound	20:21:20	4
2155577	2	41	5,31	sleep7	0	-21	swapper/7	19:05:24	7
2155957	99	38	37,0	cyclictest	0	-21	swapper/7	23:39:30	7
2155957	99	38	36,1	cyclictest	2701494	-21	ssh	23:13:16	7
2155951	99	38	36,2	cyclictest	2507539	-21	kworker/u16:2+events_unbound	22:16:20	5
2155951	99	38	35,2	cyclictest	2630915	-21	kworker/u16:3+events_unbound	22:56:22	5
2155957	99	36	34,1	cyclictest	0	-21	swapper/7	23:07:36	7
2155952	99	36	33,2	cyclictest	2823827	-21	kworker/u16:2+events_unbound	00:16:22	6
2155951	99	36	34,2	cyclictest	2630915	-21	kworker/u16:3+events_unbound	23:16:20	5
2155951	99	36	32,4	cyclictest	2188380	-21	kworker/u16:1+flush-8:0	19:26:20	5
2155950	99	36	34,2	cyclictest	1454642	-21	kworker/u16:4+events_unbound	19:21:20	4
2155950	99	36	33,2	cyclictest	2472122	-21	kworker/u16:0+events_unbound	21:51:23	4
2155957	99	35	34,0	cyclictest	0	-21	swapper/7	23:57:58	7
2155957	99	35	33,1	cyclictest	0	-21	swapper/7	22:41:31	7
2155952	99	35	33,2	cyclictest	2188380	-21	kworker/u16:1+flush-8:0	19:51:50	6
2155950	99	35	33,2	cyclictest	2751268	-21	kworker/u16:0+events_unbound	00:36:02	4
2155957	99	34	33,0	cyclictest	0	-21	swapper/7	21:46:20	7
2155957	99	34	32,1	cyclictest	2390168	-21	diskmemload	22:17:31	7
2155957	99	34	32,1	cyclictest	0	-21	swapper/7	00:10:46	7
2155957	99	34	31,2	cyclictest	2617802	-21	ssh	22:39:18	7
2155957	99	34	31,1	cyclictest	2821786	-21	ssh	00:02:31	7
2155952	99	34	31,2	cyclictest	2528246	-21	kworker/u16:3+events_unbound	22:31:23	6
2155951	99	34	32,2	cyclictest	2823827	-21	kworker/u16:2+events_unbound	00:35:51	5
2155951	99	34	32,2	cyclictest	2630915	-21	kworker/u16:3+events_unbound	23:18:35	5
2155950	99	34	32,2	cyclictest	2594878	-21	kworker/u16:2+events_unbound	22:35:02	4
2155957	99	33	32,0	cyclictest	0	-21	swapper/7	22:26:03	7
2155952	99	33	31,2	cyclictest	2712780	-21	kworker/u16:1+events_unbound	23:26:08	6
2155952	99	33	31,2	cyclictest	2227078	-21	kworker/u16:3+events_unbound	21:16:07	6
2155951	99	33	31,2	cyclictest	2881782	-21	kworker/u16:3+events_unbound	00:29:26	5
2155951	99	33	30,2	cyclictest	2227078	-21	kworker/u16:3+flush-8:0	20:31:47	5
2155950	99	33	31,2	cyclictest	2607278	-21	kworker/u16:1+events_unbound	22:45:02	4
2155950	99	33	31,2	cyclictest	2227078	-21	kworker/u16:3+events_unbound	21:26:07	4
2155957	99	32	30,1	cyclictest	2797831	-21	ssh	23:52:47	7
2155957	99	32	29,2	cyclictest	2473619	-21	ssh	21:39:42	7
2155951	99	32	30,2	cyclictest	2188380	-21	kworker/u16:1+events_unbound	22:03:03	5
2155951	99	32	29,2	cyclictest	2450694	-21	kworker/u16:4+events_unbound	21:36:32	5
2155950	99	32	30,2	cyclictest	2751268	-21	kworker/u16:0+events_unbound	23:39:47	4
2155950	99	32	30,2	cyclictest	2712831	-21	kworker/u16:2+events_unbound	23:54:31	4
2155950	99	32	30,2	cyclictest	2676946	-21	kworker/u16:0+events_unbound	23:03:03	4
2155950	99	32	30,2	cyclictest	2630915	-21	kworker/u16:3+flush-8:0	23:26:15	4
2155950	99	32	30,2	cyclictest	2630915	-21	kworker/u16:3+events_unbound	23:34:35	4
2155950	99	32	30,2	cyclictest	2528246	-21	kworker/u16:3+flush-8:0	22:37:02	4
2155950	99	32	30,2	cyclictest	2450694	-21	kworker/u16:4+flush-8:0	21:31:59	4
2155950	99	32	29,2	cyclictest	2188380	-21	kworker/u16:1+events_unbound	22:16:30	4
2155957	99	31	30,0	cyclictest	0	-21	swapper/7	23:29:18	7
2155957	99	31	30,0	cyclictest	0	-21	swapper/7	22:01:10	7
2155957	99	31	30,0	cyclictest	0	-21	swapper/7	21:31:10	7
2155952	99	31	29,2	cyclictest	2712831	-21	kworker/u16:2+events_unbound	23:28:27	6
2155951	99	31	29,2	cyclictest	2655073	-21	kworker/u16:4+events_unbound	23:09:26	5
2155951	99	31	29,2	cyclictest	2188380	-21	kworker/u16:1+events_unbound	21:48:31	5
2155950	99	31	29,2	cyclictest	2528246	-21	kworker/u16:3+flush-8:0	22:03:39	4
2155950	99	31	29,2	cyclictest	2188380	-21	kworker/u16:1+events_unbound	21:15:30	4
2155950	99	31	29,2	cyclictest	2188380	-21	kworker/u16:1+events_unbound	21:08:30	4
2155957	99	30	29,0	cyclictest	0	-21	swapper/7	23:33:30	7
2155957	99	30	29,0	cyclictest	0	-21	swapper/7	22:32:30	7
2155957	99	30	29,0	cyclictest	0	-21	swapper/7	22:04:52	7
2155957	99	30	29,0	cyclictest	0	-21	swapper/7	21:18:18	7
2155957	99	30	28,1	cyclictest	2845956	-21	ssh	00:12:47	7
2155957	99	30	28,1	cyclictest	2845956	-21	ssh	00:12:47	7
2155952	99	30	28,2	cyclictest	2630915	-21	kworker/u16:3+events_unbound	23:16:51	6
2155951	99	30	28,2	cyclictest	2823827	-21	kworker/u16:2+events_unbound	00:20:30	5
2155951	99	30	28,2	cyclictest	2763355	-21	kworker/u16:4+events_unbound	23:45:02	5
2155951	99	30	28,2	cyclictest	2751268	-21	kworker/u16:0+events_unbound	23:59:51	5
2155951	99	30	28,2	cyclictest	2607278	-21	kworker/u16:1+events_unbound	23:01:23	5
2155951	99	30	27,2	cyclictest	2528246	-21	kworker/u16:3+events_unbound	22:34:31	5
2155950	99	30	28,2	cyclictest	2567874	-21	kworker/u16:0+events_unbound	22:25:31	4
2155950	99	30	28,2	cyclictest	2450694	-21	kworker/u16:4+flush-8:0	21:41:55	4
2155957	99	29	28,0	cyclictest	0	-21	swapper/7	23:42:35	7
2155957	99	29	28,0	cyclictest	0	-21	swapper/7	23:22:51	7
2155957	99	29	0,28	cyclictest	2461902	-21	ssh	21:35:16	7
2155952	99	29	26,2	cyclictest	2294190	-21	kworker/u16:2+flush-8:0	20:36:20	6
2155951	99	29	27,2	cyclictest	2751268	-21	kworker/u16:0+events_unbound	23:49:30	5
2155950	99	29	27,2	cyclictest	2712831	-21	kworker/u16:2+flush-8:0	23:42:55	4
2155950	99	29	27,2	cyclictest	2712780	-21	kworker/u16:1+events_unbound	23:17:03	4
2155950	99	29	27,2	cyclictest	2630915	-21	kworker/u16:3+events_unbound	22:55:35	4
2155950	99	29	27,2	cyclictest	2188380	-21	kworker/u16:1+flush-8:0	19:51:16	4
2155950	99	29	26,2	cyclictest	2528246	-21	kworker/u16:3+events_unbound	22:31:02	4
2155957	99	28	27,0	cyclictest	0	-21	swapper/7	21:50:40	7
2155957	99	28	27,0	cyclictest	0	-21	swapper/7	21:23:54	7
2155957	99	28	27,0	cyclictest	0	-21	swapper/7	21:15:51	7
2155957	99	28	26,1	cyclictest	0	-21	swapper/7	22:27:58	7
2155952	99	28	27,1	cyclictest	2188380	-21	kworker/u16:1+events_unbound	22:17:03	6
2155952	99	28	26,2	cyclictest	2655073	-21	kworker/u16:4+events_unbound	23:15:31	6
2155952	99	28	25,2	cyclictest	2594878	-21	kworker/u16:2+events_unbound	22:41:23	6
2155951	99	28	26,2	cyclictest	2823827	-21	kworker/u16:2+events_unbound	00:15:31	5
2155951	99	28	26,2	cyclictest	2823827	-21	kworker/u16:2+events_unbound	00:15:31	5
2155951	99	28	26,2	cyclictest	2799716	-21	kworker/u16:4+flush-8:0	00:03:26	5
2155951	99	28	26,2	cyclictest	2528246	-21	kworker/u16:3+events_unbound	22:10:11	5
2155951	99	28	26,2	cyclictest	2332761	-21	kworker/u16:0+events_unbound	21:31:02	5
2155951	99	28	26,2	cyclictest	2332761	-21	kworker/u16:0+events_unbound	21:18:51	5
2155951	99	28	26,2	cyclictest	2227078	-21	kworker/u16:3+events_unbound	21:25:00	5
2155951	99	28	25,2	cyclictest	2799716	-21	kworker/u16:4+events_unbound	00:06:20	5
2155951	99	28	25,2	cyclictest	2117573	-21	kworker/u16:2+flush-8:0	19:11:21	5
2155950	99	28	26,2	cyclictest	2507539	-21	kworker/u16:2+events_unbound	21:57:27	4
2155957	99	27	26,0	cyclictest	0	-21	swapper/7	23:51:07	7
2155952	99	27	25,2	cyclictest	2751268	-21	kworker/u16:0+events_unbound	23:59:43	6
2155952	99	27	25,2	cyclictest	2227078	-21	kworker/u16:3+flush-8:0	21:16:31	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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