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 Thu Mar 26, 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
1478121	2	59	48,8	sleep5	0	-21	swapper/5	19:00:01	5
1478338	2	48	25,7	sleep4	0	-21	swapper/4	19:03:05	4
1478630	99	45	42,2	cyclictest	1701937	-21	kworker/u16:2+flush-8:0	22:18:19	6
1478630	99	43	41,2	cyclictest	2095205	-21	kworker/u16:3+events_unbound	00:03:36	6
1478630	99	43	41,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:33:29	6
1478630	99	42	40,2	cyclictest	2155586	-21	kworker/u16:5+events_unbound	00:10:29	6
1478630	99	42	40,2	cyclictest	2155586	-21	kworker/u16:5+events_unbound	00:10:29	6
1478630	99	42	40,2	cyclictest	1890294	-21	kworker/u16:3+events_unbound	22:27:49	6
1478630	99	41	39,2	cyclictest	2121780	-21	kworker/u16:4+events_unbound	00:20:29	6
1478630	99	41	39,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:40:03	6
1478630	99	41	39,2	cyclictest	1431217	-21	kworker/u16:4+flush-8:0	20:08:33	6
1478630	99	39	37,2	cyclictest	2095205	-21	kworker/u16:3+events_unbound	00:01:02	6
1478630	99	39	37,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:28:35	6
1478630	99	39	37,2	cyclictest	1963280	-21	kworker/u16:1+events_unbound	23:19:11	6
1478630	99	39	37,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:50:41	6
1478630	99	39	37,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:40:54	6
1478630	99	39	37,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:37:27	6
1478630	99	39	37,2	cyclictest	1760415	-21	kworker/u16:0+events_unbound	22:17:23	6
1478630	99	39	37,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:47:10	6
1478621	99	39	37,2	cyclictest	1963280	-21	kworker/u16:1+flush-8:0	23:38:21	4
1478273	2	39	3,31	sleep7	0	-21	swapper/7	19:02:12	7
1478630	99	38	36,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:26:19	6
1478630	99	38	36,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:15:12	6
1478630	99	38	36,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:48:02	6
1478630	99	38	36,2	cyclictest	1890294	-21	kworker/u16:3+events_unbound	22:30:54	6
1478630	99	38	36,2	cyclictest	1760415	-21	kworker/u16:0+events_unbound	21:51:59	6
1478630	99	38	36,2	cyclictest	1735898	-21	kworker/u16:3+flush-8:0	21:18:49	6
1478630	99	38	36,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	22:01:06	6
1478630	99	38	36,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	21:17:14	6
1478630	99	38	35,2	cyclictest	1950438	-21	kworker/u16:6+flush-8:0	23:08:04	6
1478621	99	38	36,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:48:32	4
1478630	99	37	35,2	cyclictest	2121780	-21	kworker/u16:4+events_unbound	23:55:30	6
1478630	99	37	35,2	cyclictest	2061435	-21	kworker/u16:2+events_unbound	23:47:07	6
1478630	99	37	35,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:11:35	6
1478630	99	37	35,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:59:22	6
1478630	99	37	35,2	cyclictest	1820292	-21	kworker/u16:1+events_unbound	22:07:02	6
1478630	99	37	35,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	21:26:03	6
1478621	99	37	35,2	cyclictest	1431217	-21	kworker/u16:4+flush-8:0	19:18:26	4
1478621	99	37	34,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:18:35	4
1478328	2	37	27,7	sleep6	0	-21	swapper/6	19:02:59	6
1478635	99	36	30,5	cyclictest	1832280	-21	latency_hist	21:53:05	7
1478630	99	36	34,2	cyclictest	2169673	-21	kworker/u16:2+events_unbound	00:29:38	6
1478630	99	36	34,2	cyclictest	2095205	-21	kworker/u16:3+flush-8:0	00:13:45	6
1478630	99	36	34,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:53:31	6
1478630	99	36	34,2	cyclictest	1735898	-21	kworker/u16:3+events_unbound	21:35:26	6
1478630	99	36	34,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:30:19	6
1478630	99	36	34,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:10:31	6
1478635	99	35	0,34	cyclictest	2159429	-21	sed	00:08:21	7
1478635	99	35	0,34	cyclictest	2159429	-21	sed	00:08:21	7
1478629	99	35	32,2	cyclictest	1431217	-21	kworker/u16:4+flush-8:0	19:18:19	5
1478635	99	34	28,5	cyclictest	650	-21	systemd-journal	20:33:05	7
1478630	99	34	32,2	cyclictest	1735898	-21	kworker/u16:3+events_unbound	21:40:23	6
1478630	99	34	31,2	cyclictest	1470046	-21	kworker/u16:0+events_unbound	19:03:08	6
1478621	99	34	32,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	22:56:40	4
1478621	99	34	32,2	cyclictest	1760415	-21	kworker/u16:0+events_unbound	22:29:11	4
1478635	99	33	30,2	cyclictest	2207295	-21	hwlatdetect	00:28:18	7
1478630	99	33	31,2	cyclictest	1820292	-21	kworker/u16:1+events_unbound	22:11:55	6
1478630	99	33	31,2	cyclictest	1635639	-21	kworker/u16:2+events_unbound	20:30:35	6
1478621	99	33	31,2	cyclictest	2155586	-21	kworker/u16:5+flush-8:0	00:07:58	4
1478621	99	33	31,2	cyclictest	2155586	-21	kworker/u16:5+events_unbound	00:10:23	4
1478621	99	33	31,2	cyclictest	2155586	-21	kworker/u16:5+events_unbound	00:10:23	4
1478621	99	33	31,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	22:48:04	4
1478630	99	32	30,2	cyclictest	2121780	-21	kworker/u16:4+events_unbound	00:23:05	6
1478630	99	32	30,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:49:36	6
1478630	99	32	30,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:55:32	6
1478630	99	32	30,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	21:05:36	6
1478621	99	32	30,2	cyclictest	1950438	-21	kworker/u16:6+events_unbound	23:03:40	4
1478621	99	32	30,2	cyclictest	1928633	-21	kworker/u16:4+events_unbound	23:02:20	4
1478621	99	32	30,2	cyclictest	1760415	-21	kworker/u16:0+events_unbound	22:17:49	4
1478621	99	32	30,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:12:40	4
1478635	99	31	0,29	cyclictest	650	-21	systemd-journal	19:38:05	7
1478621	99	31	29,2	cyclictest	2121780	-21	kworker/u16:4+flush-8:0	00:18:21	4
1478621	99	31	29,2	cyclictest	2095205	-21	kworker/u16:3+events_unbound	23:58:49	4
1478621	99	31	29,2	cyclictest	1963280	-21	kworker/u16:1+events_unbound	23:34:08	4
1478621	99	31	29,2	cyclictest	1963280	-21	kworker/u16:1+events_unbound	23:26:07	4
1478621	99	31	29,2	cyclictest	1735898	-21	kworker/u16:3+events_unbound	21:16:25	4
1478635	99	30	30,0	cyclictest	0	-21	swapper/7	21:40:58	7
1478630	99	30	28,2	cyclictest	1549228	-21	kworker/u16:0+events_unbound	20:46:35	6
1478630	99	30	28,2	cyclictest	1449907	-21	kworker/u16:1+events_unbound	19:11:30	6
1478621	99	30	28,2	cyclictest	2182030	-21	kworker/u16:0+events_unbound	00:31:31	4
1478621	99	30	28,2	cyclictest	2095205	-21	kworker/u16:3+flush-8:0	00:17:59	4
1478621	99	30	28,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:48:57	4
1478621	99	30	28,2	cyclictest	1928999	-21	kworker/u16:5+events_unbound	22:36:09	4
1478621	99	30	28,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	22:07:45	4
1478621	99	30	28,2	cyclictest	1701937	-21	kworker/u16:2+events_unbound	21:03:02	4
1478621	99	30	28,2	cyclictest	1626092	-21	kworker/u16:1+flush-8:0	20:38:26	4
1478630	99	29	27,2	cyclictest	1549228	-21	kworker/u16:0+events_unbound	19:50:31	6
1478630	99	29	27,2	cyclictest	1530251	-21	kworker/u16:2+events_unbound	20:06:47	6
1478630	99	29	27,2	cyclictest	1431217	-21	kworker/u16:4+events_unbound	19:22:31	6
1478621	99	29	27,2	cyclictest	1928633	-21	kworker/u16:4+flush-8:0	23:13:28	4
1478630	99	28	26,2	cyclictest	1645195	-21	kworker/u16:4+events_unbound	20:36:35	6
1478630	99	28	26,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	20:57:59	6
1478621	99	28	26,2	cyclictest	2109713	-21	kworker/u16:1+events_unbound	23:55:24	4
1478621	99	28	26,2	cyclictest	1549228	-21	kworker/u16:0+events_unbound	20:11:18	4
1478630	99	27	25,2	cyclictest	1626092	-21	kworker/u16:1+events_unbound	20:20:43	6
1478621	99	27	25,2	cyclictest	2037265	-21	kworker/u16:0+events_unbound	23:44:06	4
1478621	99	27	25,2	cyclictest	1950438	-21	kworker/u16:6+flush-8:0	23:08:40	4
1478621	99	27	25,2	cyclictest	1549228	-21	kworker/u16:0+events_unbound	19:53:04	4
1478621	99	27	25,2	cyclictest	1431217	-21	kworker/u16:4+events_unbound	20:16:39	4
1478621	99	27	25,2	cyclictest	1431217	-21	kworker/u16:4+events_unbound	19:39:47	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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