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 May 07, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1893509	2	92	0,1	sleep7	1893511	-21	date	23:43:32	7
1282789	2	46	20,8	sleep5	0	-21	swapper/5	19:04:36	5
1282882	2	45	35,7	sleep4	0	-21	swapper/4	19:05:56	4
1282942	2	43	7,31	sleep7	0	-21	swapper/7	19:06:47	7
1283364	99	39	37,2	cyclictest	1591516	-21	kworker/u16:1+events_unbound	22:17:50	6
1283364	99	38	36,2	cyclictest	1784167	-21	kworker/u16:0+events_unbound	23:15:10	6
1283369	99	36	35,0	cyclictest	0	-21	swapper/7	00:28:33	7
1283364	99	36	34,2	cyclictest	1623828	-21	kworker/u16:3+events_unbound	21:57:54	6
1283364	99	36	34,2	cyclictest	1591516	-21	kworker/u16:1+events_unbound	22:36:18	6
1283364	99	36	33,2	cyclictest	1651078	-21	kworker/u16:0+events_unbound	22:03:34	6
1283358	99	36	34,2	cyclictest	1554617	-21	kworker/u16:2+flush-8:0	22:18:26	4
1283369	99	35	33,1	cyclictest	1795554	-21	ssh	23:02:10	7
1283369	99	35	33,1	cyclictest	1795554	-21	ssh	23:02:10	7
1283364	99	35	33,2	cyclictest	1866560	-21	kworker/u16:1+events_unbound	23:37:30	6
1283364	99	35	33,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	22:57:34	6
1283364	99	35	33,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	00:10:30	6
1283364	99	35	33,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	00:36:31	6
1283369	99	34	32,1	cyclictest	1893641	-21	ssh	23:43:38	7
1283364	99	34	32,2	cyclictest	548894	-21	kworker/u16:3+events_unbound	19:46:54	6
1283364	99	34	32,2	cyclictest	1920494	-21	kworker/u16:0+events_unbound	00:25:54	6
1283364	99	34	32,2	cyclictest	1784167	-21	kworker/u16:0+events_unbound	23:11:15	6
1283364	99	34	32,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	23:08:31	6
1283364	99	34	32,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	23:57:38	6
1283364	99	34	32,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	23:19:51	6
1283364	99	34	32,2	cyclictest	1469925	-21	kworker/u16:0+events_unbound	21:34:27	6
1283364	99	34	32,2	cyclictest	1440459	-21	kworker/u16:0+flush-8:0	20:29:01	6
1283358	99	34	32,2	cyclictest	1459709	-21	kworker/u16:2+events_unbound	21:03:32	4
1283358	99	34	32,2	cyclictest	1383523	-21	kworker/u16:2+flush-8:0	20:08:59	4
1283369	99	33	32,0	cyclictest	0	-21	swapper/7	22:26:10	7
1283369	99	33	32,0	cyclictest	0	-21	swapper/7	21:22:10	7
1283369	99	33	31,1	cyclictest	1564848	-21	ssh	21:25:47	7
1283364	99	33	31,2	cyclictest	1651078	-21	kworker/u16:0+events_unbound	22:41:11	6
1283364	99	33	31,2	cyclictest	1651078	-21	kworker/u16:0+events_unbound	22:21:06	6
1283364	99	33	31,2	cyclictest	1623828	-21	kworker/u16:3+events_unbound	22:30:26	6
1283364	99	33	31,2	cyclictest	1623828	-21	kworker/u16:3+events_unbound	22:24:46	6
1283364	99	33	31,2	cyclictest	1489006	-21	kworker/u16:4+events_unbound	21:15:39	6
1283358	99	33	31,2	cyclictest	1591516	-21	kworker/u16:1+events_unbound	22:08:10	4
1283369	99	32	31,0	cyclictest	0	-21	swapper/7	21:28:47	7
1283364	99	32	30,2	cyclictest	1920494	-21	kworker/u16:0+events_unbound	00:04:46	6
1283364	99	32	30,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	23:41:58	6
1283364	99	32	30,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	00:17:59	6
1283364	99	32	30,2	cyclictest	1591516	-21	kworker/u16:1+events_unbound	21:49:18	6
1283364	99	32	30,2	cyclictest	1591516	-21	kworker/u16:1+events_unbound	21:41:02	6
1283364	99	32	30,2	cyclictest	1554617	-21	kworker/u16:2+events_unbound	21:45:22	6
1283364	99	32	30,2	cyclictest	1508250	-21	kworker/u16:1+events_unbound	21:12:22	6
1283364	99	32	30,2	cyclictest	1459709	-21	kworker/u16:2+events_unbound	20:57:15	6
1283358	99	32	30,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	23:23:55	4
1283358	99	32	30,2	cyclictest	1459709	-21	kworker/u16:2+events_unbound	20:48:26	4
1283369	99	31	30,0	cyclictest	0	-21	swapper/7	22:53:18	7
1283369	99	31	28,2	cyclictest	1650687	-21	ssh	22:02:55	7
1283369	99	31	26,4	cyclictest	635	-21	systemd-journal	22:43:32	7
1283364	99	31	29,2	cyclictest	1881269	-21	kworker/u16:2+events_unbound	23:50:59	6
1283364	99	31	29,2	cyclictest	1881269	-21	kworker/u16:2+events_unbound	23:45:23	6
1283364	99	31	29,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	22:53:30	6
1283364	99	31	29,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	00:31:54	6
1283364	99	31	29,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	00:02:27	6
1283364	99	31	29,2	cyclictest	1623828	-21	kworker/u16:3+events_unbound	22:00:34	6
1283364	99	31	29,2	cyclictest	1531679	-21	kworker/u16:3+events_unbound	21:25:39	6
1283364	99	31	28,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	00:18:33	6
1283358	99	31	28,2	cyclictest	1881269	-21	kworker/u16:2+events_unbound	23:48:31	4
1283369	99	30	29,0	cyclictest	0	-21	swapper/7	22:14:23	7
1283369	99	30	27,2	cyclictest	1674033	-21	ssh	22:11:19	7
1283369	99	30	0,28	cyclictest	1758559	-21	ssh	22:45:59	7
1283364	99	30	28,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	23:25:19	6
1283364	99	30	28,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	23:00:17	6
1283364	99	30	28,2	cyclictest	1747953	-21	kworker/u16:4+events_unbound	23:00:17	6
1283369	99	29	28,0	cyclictest	0	-21	swapper/7	23:17:46	7
1283369	99	29	28,0	cyclictest	0	-21	swapper/7	23:13:26	7
1283369	99	29	28,0	cyclictest	0	-21	swapper/7	21:37:11	7
1283369	99	29	28,0	cyclictest	0	-21	swapper/7	21:14:10	7
1283369	99	29	28,0	cyclictest	0	-21	swapper/7	00:35:41	7
1283369	99	29	0,27	cyclictest	1879302	-21	sh	23:35:19	7
1283364	99	29	27,2	cyclictest	1554617	-21	kworker/u16:2+events_unbound	22:11:52	6
1283364	99	29	27,2	cyclictest	1489006	-21	kworker/u16:4+events_unbound	21:20:40	6
1283360	99	29	24,4	cyclictest	1297862	-21	iostat_ios	19:13:47	5
1283358	99	29	27,2	cyclictest	1272390	-21	kworker/u16:2+events_unbound	19:23:27	4
1283358	99	29	27,2	cyclictest	1272390	-21	kworker/u16:2+events_unbound	19:23:27	4
1283369	99	28	27,0	cyclictest	0	-21	swapper/7	22:19:47	7
1283369	99	28	27,0	cyclictest	0	-21	swapper/7	21:50:03	7
1283369	99	28	25,2	cyclictest	1940715	-21	ssh	00:01:38	7
1283364	99	28	26,2	cyclictest	1623828	-21	kworker/u16:3+events_unbound	22:45:55	6
1283364	99	28	26,2	cyclictest	1354423	-21	kworker/u16:1+events_unbound	20:13:56	6
1283369	99	27	26,0	cyclictest	0	-21	swapper/7	20:49:11	7
1283369	99	27	26,0	cyclictest	0	-21	swapper/7	20:18:22	7
1283369	99	27	26,0	cyclictest	0	-21	swapper/7	00:27:34	7
1283369	99	27	26,0	cyclictest	0	-21	swapper/7	00:17:09	7
1283369	99	27	25,1	cyclictest	1661869	-21	ssh	22:06:12	7
1283369	99	27	24,2	cyclictest	1601195	-21	ssh	21:40:50	7
1283364	99	27	25,2	cyclictest	1531679	-21	kworker/u16:3+events_unbound	21:31:23	6
1283364	99	27	25,2	cyclictest	1272390	-21	kworker/u16:2+events_unbound	19:08:34	6
1283358	99	27	25,2	cyclictest	1623828	-21	kworker/u16:3+events_unbound	22:33:59	4
1283358	99	27	25,2	cyclictest	1489006	-21	kworker/u16:4+events_unbound	21:13:54	4
1282771	2	27	16,8	sleep6	0	-21	swapper/6	19:04:21	6
1283369	99	26	25,0	cyclictest	0	-21	swapper/7	23:24:46	7
1283369	99	26	25,0	cyclictest	0	-21	swapper/7	21:44:27	7
1283369	99	26	24,1	cyclictest	1989340	-21	ssh	00:21:54	7
1283369	99	26	24,1	cyclictest	0	-21	swapper/7	23:51:07	7
1283364	99	26	24,2	cyclictest	1747954	-21	kworker/u16:5+events_unbound	23:29:35	6
1283364	99	26	24,2	cyclictest	1272390	-21	kworker/u16:2+events_unbound	19:31:43	6
1283358	99	26	24,2	cyclictest	1383523	-21	kworker/u16:2+flush-8:0	20:03:51	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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