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 Wed Mar 04, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1913442	2	58	48,7	sleep5	0	-21	swapper/5	19:00:25	5
1914030	99	54	47,6	cyclictest	2196177	-21	latency_hist	21:24:32	7
1914030	99	49	43,5	cyclictest	1956041	-21	latency_hist	19:24:32	7
1914028	99	46	44,2	cyclictest	2592025	-21	kworker/u16:0+flush-8:0	00:34:32	6
1913611	2	46	37,6	sleep4	0	-21	swapper/4	19:02:49	4
1914028	99	42	40,2	cyclictest	2508372	-21	kworker/u16:1+events_unbound	23:43:33	6
1914028	99	42	40,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	23:09:13	6
1914028	99	42	40,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	22:52:33	6
1914030	99	41	35,5	cyclictest	650	-21	systemd-journal	19:39:32	7
1914030	99	41	35,5	cyclictest	650	-21	systemd-journal	19:39:32	7
1914028	99	41	39,2	cyclictest	2592026	-21	kworker/u16:2+events_unbound	00:27:33	6
1914028	99	41	39,2	cyclictest	2592026	-21	kworker/u16:2+events_unbound	00:18:26	6
1914028	99	41	39,2	cyclictest	2493763	-21	kworker/u16:0+events_unbound	23:31:38	6
1914028	99	41	39,2	cyclictest	2493763	-21	kworker/u16:0+events_unbound	23:27:53	6
1914028	99	41	39,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	00:03:06	6
1914028	99	41	39,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:43:22	6
1914028	99	41	38,2	cyclictest	2256592	-21	kworker/u16:0+events_unbound	21:59:33	6
1914028	99	40	38,2	cyclictest	2592026	-21	kworker/u16:2+events_unbound	00:22:34	6
1914028	99	40	38,2	cyclictest	2592026	-21	kworker/u16:2+events_unbound	00:22:34	6
1914028	99	40	38,2	cyclictest	2529635	-21	kworker/u16:4+events_unbound	00:08:05	6
1914028	99	40	38,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	22:47:22	6
1914028	99	40	38,2	cyclictest	2364526	-21	kworker/u16:2+events_unbound	23:11:18	6
1914028	99	40	38,2	cyclictest	2364526	-21	kworker/u16:2+events_unbound	23:02:13	6
1914028	99	40	38,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:17:18	6
1914028	99	39	37,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	23:49:29	6
1914028	99	39	37,2	cyclictest	2182079	-21	kworker/u16:2+events_unbound	21:46:06	6
1914028	99	39	37,2	cyclictest	2182079	-21	kworker/u16:2+events_unbound	21:32:33	6
1914028	99	39	37,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:29:06	6
1914028	99	39	37,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	21:06:47	6
1913482	2	39	4,31	sleep7	0	-21	swapper/7	19:00:59	7
1914028	99	38	36,2	cyclictest	2292105	-21	kworker/u16:1+events_unbound	22:07:06	6
1914028	99	38	36,2	cyclictest	2196218	-21	kworker/u16:3+events_unbound	21:55:50	6
1914028	99	38	36,2	cyclictest	2196218	-21	kworker/u16:3+events_unbound	21:37:30	6
1914028	99	38	36,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	21:12:23	6
1914028	99	38	35,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	23:54:41	6
1914015	99	38	35,2	cyclictest	2364526	-21	kworker/u16:2+flush-8:0	23:34:32	4
1914030	99	37	32,4	cyclictest	2184247	-21	latency_hist	21:19:32	7
1914028	99	37	35,2	cyclictest	2493763	-21	kworker/u16:0+events_unbound	23:53:58	6
1914020	99	37	35,2	cyclictest	2493763	-21	kworker/u16:0+flush-8:0	23:44:58	5
1914020	99	37	35,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	23:38:50	5
1914020	99	37	35,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	23:11:01	5
1914020	99	37	35,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	22:51:46	5
1914028	99	36	34,2	cyclictest	2592026	-21	kworker/u16:2+events_unbound	00:10:25	6
1914028	99	36	34,2	cyclictest	2508372	-21	kworker/u16:1+events_unbound	23:35:34	6
1914028	99	36	34,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	23:15:26	6
1914028	99	36	34,2	cyclictest	2325334	-21	kworker/u16:1+events_unbound	22:36:19	6
1914028	99	36	34,2	cyclictest	2325334	-21	kworker/u16:1+events_unbound	22:23:41	6
1914028	99	36	34,2	cyclictest	2325334	-21	kworker/u16:1+events_unbound	22:23:41	6
1914028	99	36	34,2	cyclictest	2256592	-21	kworker/u16:0+events_unbound	22:25:46	6
1914020	99	36	34,2	cyclictest	1867062	-21	kworker/u16:4+flush-8:0	19:09:33	5
1914020	99	36	33,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	23:19:42	5
1914030	99	35	29,5	cyclictest	2507944	-21	latency_hist	23:34:32	7
1914028	99	35	33,2	cyclictest	2304184	-21	kworker/u16:2+events_unbound	22:12:21	6
1914028	99	35	33,2	cyclictest	2196218	-21	kworker/u16:3+events_unbound	22:33:06	6
1914028	99	35	33,2	cyclictest	2196218	-21	kworker/u16:3+events_unbound	22:15:05	6
1914020	99	35	33,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:15:29	5
1914030	99	34	0,33	cyclictest	2615905	-21	latency_hist	00:19:31	7
1914028	99	34	32,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	23:22:54	6
1914028	99	34	32,2	cyclictest	2182079	-21	kworker/u16:2+events_unbound	21:22:33	6
1914020	99	34	32,2	cyclictest	2529635	-21	kworker/u16:4+events_unbound	00:07:10	5
1914020	99	34	32,2	cyclictest	2508372	-21	kworker/u16:1+flush-8:0	23:55:09	5
1914020	99	34	32,2	cyclictest	2429417	-21	kworker/u16:3+events_unbound	00:03:41	5
1914015	99	34	31,2	cyclictest	2013981	-21	kworker/u16:1+flush-8:0	21:45:02	4
1914030	99	33	0,31	cyclictest	2316169	-21	latency_hist	22:14:33	7
1914028	99	33	31,2	cyclictest	2182079	-21	kworker/u16:2+events_unbound	21:52:09	6
1914020	99	33	31,2	cyclictest	2256592	-21	kworker/u16:0+events_unbound	22:02:58	5
1914028	99	32	30,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	22:40:41	6
1914020	99	32	30,2	cyclictest	2325334	-21	kworker/u16:1+flush-8:0	22:25:12	5
1914020	99	32	30,2	cyclictest	2325334	-21	kworker/u16:1+events_unbound	22:38:56	5
1914020	99	32	30,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:49:33	5
1914015	99	32	28,3	cyclictest	2364578	-21	kworker/u16:4+flush-8:0	23:00:01	4
1914028	99	31	29,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:13:06	6
1914020	99	31	29,2	cyclictest	2592026	-21	kworker/u16:2+events_unbound	00:26:50	5
1914020	99	31	29,2	cyclictest	2592025	-21	kworker/u16:0+events_unbound	00:10:33	5
1914020	99	31	29,2	cyclictest	2196218	-21	kworker/u16:3+events_unbound	21:38:21	5
1914020	99	31	29,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:42:05	5
1914020	99	31	29,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:22:41	5
1914020	99	31	29,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	20:51:42	5
1913595	2	31	21,7	sleep6	0	-21	swapper/6	19:02:34	6
1914028	99	30	28,2	cyclictest	2364526	-21	kworker/u16:2+events_unbound	22:58:09	6
1914020	99	30	28,2	cyclictest	2364578	-21	kworker/u16:4+events_unbound	22:46:25	5
1914020	99	30	28,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	21:07:20	5
1914020	99	30	27,2	cyclictest	2196218	-21	kworker/u16:3+events_unbound	21:29:33	5
1914028	99	29	27,2	cyclictest	2013981	-21	kworker/u16:1+events_unbound	21:03:06	6
1914020	99	29	27,2	cyclictest	2325334	-21	kworker/u16:1+events_unbound	22:23:08	5
1914020	99	29	27,2	cyclictest	2325334	-21	kworker/u16:1+events_unbound	22:23:08	5
1914020	99	29	27,2	cyclictest	2256592	-21	kworker/u16:0+events_unbound	22:08:48	5
1914020	99	29	27,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:59:06	5
1914020	99	29	27,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:36:02	5
1914030	99	28	23,4	cyclictest	2436093	-21	latency_hist	23:04:32	7
1914028	99	28	26,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:07:05	6
1914028	99	28	26,2	cyclictest	1867062	-21	kworker/u16:4+events_unbound	19:36:43	6
1914028	99	28	26,2	cyclictest	1867062	-21	kworker/u16:4+events_unbound	19:36:43	6
1914028	99	28	26,2	cyclictest	1867062	-21	kworker/u16:4+events_unbound	19:08:43	6
1914020	99	28	26,2	cyclictest	2429417	-21	kworker/u16:3+flush-8:0	23:15:04	5
1914020	99	28	26,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:46:02	5
1914020	99	28	26,2	cyclictest	1867062	-21	kworker/u16:4+events_unbound	19:47:38	5
1914028	99	27	25,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:40:42	6
1914028	99	27	25,2	cyclictest	1956420	-21	kworker/u16:0+events_unbound	20:26:06	6
1914020	99	27	25,2	cyclictest	2529635	-21	kworker/u16:4+events_unbound	23:40:25	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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