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 Fri Jul 31, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1316832	2	53	19,29	sleep7	0	-21	swapper/7	07:07:04	7
1316832	2	53	19,29	sleep7	0	-21	swapper/7	07:07:04	7
1317251	99	51	49,2	cyclictest	1505445	-21	kworker/u16:2+flush-8:0	09:14:23	5
1317262	99	49	45,3	cyclictest	125	-21	kswapd0	10:17:45	7
1317256	99	47	45,2	cyclictest	1408683	-21	kworker/u16:2+flush-8:0	08:29:07	6
1317251	99	47	45,2	cyclictest	2047106	-21	kworker/u16:2+flush-8:0	12:29:06	5
1317251	99	45	43,2	cyclictest	1678344	-21	kworker/u16:3+events_unbound	10:04:07	5
1317256	99	44	41,2	cyclictest	1628257	-21	kworker/u16:1+flush-8:0	09:54:06	6
1317251	99	44	42,2	cyclictest	594422	-21	kworker/u16:6+events_unbound	07:14:06	5
1317251	99	44	38,5	cyclictest	1727281	-21	kworker/u16:4+flush-8:0	10:38:51	5
1316802	2	44	34,7	sleep5	0	-21	swapper/5	07:06:37	5
1316802	2	44	34,7	sleep5	0	-21	swapper/5	07:06:37	5
1317262	99	43	42,0	cyclictest	0	-21	swapper/7	07:34:07	7
1317262	99	43	40,2	cyclictest	1997072	-21	ntpq	12:04:19	7
1317256	99	43	41,2	cyclictest	1726175	-21	kworker/u16:2+events_unbound	10:19:26	6
1317256	99	43	41,2	cyclictest	1726175	-21	kworker/u16:2+events_unbound	10:19:26	6
1317251	99	43	41,2	cyclictest	1408683	-21	kworker/u16:2+events_unbound	08:14:06	5
1317251	99	43	40,2	cyclictest	1678344	-21	kworker/u16:3+flush-8:0	10:09:09	5
1317256	99	41	39,2	cyclictest	1865511	-21	kworker/u16:2+flush-8:0	12:19:02	6
1317256	99	41	39,2	cyclictest	1326638	-21	kworker/u16:1+flush-8:0	07:24:22	6
1317251	99	41	39,2	cyclictest	1752857	-21	kworker/u16:1+flush-8:0	11:34:09	5
1317251	99	41	38,2	cyclictest	1505445	-21	kworker/u16:2+events_unbound	09:29:22	5
1317262	99	40	37,2	cyclictest	1646290	-21	cut	09:44:13	7
1317256	99	40	38,2	cyclictest	1752857	-21	kworker/u16:1+flush-8:0	11:34:17	6
1317251	99	40	38,2	cyclictest	1727281	-21	kworker/u16:4+events_unbound	10:17:56	5
1317251	99	40	38,2	cyclictest	1641024	-21	kworker/u16:2+events_unbound	09:48:53	5
1317251	99	39	37,2	cyclictest	1865511	-21	kworker/u16:2+flush-8:0	11:28:51	5
1317251	99	39	36,2	cyclictest	594422	-21	kworker/u16:6+flush-8:0	08:24:08	5
1317251	99	39	36,2	cyclictest	1418638	-21	kworker/u16:1+flush-8:0	08:34:06	5
1317256	99	38	36,2	cyclictest	1525508	-21	kworker/u16:0+flush-8:0	09:19:20	6
1317256	99	38	36,2	cyclictest	1326638	-21	kworker/u16:1+events_unbound	07:14:22	6
1317256	99	38	35,3	cyclictest	594422	-21	kworker/u16:6+flush-8:0	08:48:52	6
1317256	99	38	35,3	cyclictest	1665912	-21	kworker/u16:0+flush-8:0	09:59:17	6
1317251	99	38	36,2	cyclictest	2033806	-21	kworker/u16:3+flush-8:0	12:19:41	5
1317251	99	38	36,2	cyclictest	1984254	-21	kworker/u16:0+events_unbound	12:04:25	5
1317251	99	38	36,2	cyclictest	1752857	-21	kworker/u16:1+flush-8:0	11:09:14	5
1317262	99	37	36,0	cyclictest	0	-21	swapper/7	08:19:25	7
1317262	99	37	36,0	cyclictest	0	-21	swapper/7	07:39:25	7
1317262	99	37	35,1	cyclictest	1764481	-21	ssh	10:32:34	7
1317256	99	37	35,2	cyclictest	1727281	-21	kworker/u16:4+flush-8:0	10:18:03	6
1317256	99	37	34,2	cyclictest	1984254	-21	kworker/u16:0+flush-8:0	12:14:07	6
1317251	99	37	35,2	cyclictest	1727281	-21	kworker/u16:4+events_unbound	10:29:22	5
1317251	99	37	34,2	cyclictest	356539	-21	kworker/u16:5+flush-8:0	07:24:09	5
1317262	99	36	35,0	cyclictest	0	-21	swapper/7	08:54:07	7
1317262	99	36	34,1	cyclictest	1927469	-21	ssh	11:39:12	7
1317256	99	36	34,2	cyclictest	1752857	-21	kworker/u16:1+events_unbound	10:39:14	6
1317256	99	36	34,2	cyclictest	1641024	-21	kworker/u16:2+events_unbound	09:49:05	6
1317256	99	36	34,2	cyclictest	1525508	-21	kworker/u16:0+events_unbound	09:39:10	6
1317256	99	36	34,2	cyclictest	1525508	-21	kworker/u16:0+events_unbound	09:39:10	6
1317256	99	36	33,2	cyclictest	1727281	-21	kworker/u16:4+flush-8:0	11:44:25	6
1317256	99	36	33,2	cyclictest	1418638	-21	kworker/u16:1+flush-8:0	07:59:09	6
1317251	99	36	34,2	cyclictest	1752857	-21	kworker/u16:1+events_unbound	10:54:25	5
1317251	99	36	34,2	cyclictest	1525508	-21	kworker/u16:0+flush-8:0	09:19:22	5
1317251	99	36	34,2	cyclictest	1505445	-21	kworker/u16:2+flush-8:0	09:34:07	5
1317262	99	35	34,0	cyclictest	0	-21	swapper/7	12:12:37	7
1317262	99	35	33,1	cyclictest	2023080	-21	ssh	12:15:33	7
1317256	99	35	33,2	cyclictest	1865511	-21	kworker/u16:2+events_unbound	12:09:06	6
1317256	99	35	33,2	cyclictest	1505445	-21	kworker/u16:2+flush-8:0	08:43:52	6
1316733	2	35	24,8	sleep4	0	-21	swapper/4	07:05:40	4
1316733	2	35	24,8	sleep4	0	-21	swapper/4	07:05:40	4
1317262	99	34	33,0	cyclictest	0	-21	swapper/7	10:47:09	7
1317262	99	34	30,2	cyclictest	1407563	-21	ntpq	07:49:21	7
1317256	99	34	31,2	cyclictest	1665912	-21	kworker/u16:0+events_unbound	10:09:06	6
1317256	99	34	31,2	cyclictest	1505445	-21	kworker/u16:2+flush-8:0	09:28:53	6
1317251	99	34	32,2	cyclictest	1727281	-21	kworker/u16:4+flush-8:0	11:50:42	5
1317251	99	34	32,2	cyclictest	1727281	-21	kworker/u16:4+flush-8:0	10:44:17	5
1317251	99	34	31,2	cyclictest	1359576	-21	kworker/u16:0+flush-8:0	07:49:11	5
1317262	99	33	32,0	cyclictest	0	-21	swapper/7	11:11:13	7
1317262	99	33	30,2	cyclictest	1565893	-21	ssh	09:12:25	7
1317256	99	33	31,2	cyclictest	1505445	-21	kworker/u16:2+events_unbound	09:34:15	6
1317251	99	33	31,2	cyclictest	594422	-21	kworker/u16:6+flush-8:0	07:29:10	5
1317251	99	33	31,2	cyclictest	594422	-21	kworker/u16:6+flush-8:0	07:29:10	5
1317251	99	33	31,2	cyclictest	1752857	-21	kworker/u16:1+events_unbound	11:33:50	5
1317251	99	33	31,2	cyclictest	1628257	-21	kworker/u16:1+events_unbound	10:01:02	5
1317251	99	33	31,2	cyclictest	1525508	-21	kworker/u16:0+events_unbound	09:46:01	5
1317251	99	33	29,3	cyclictest	1752857	-21	kworker/u16:1+flush-8:0	12:00:01	5
1316679	2	33	23,7	sleep6	0	-21	swapper/6	07:04:54	6
1316679	2	33	23,7	sleep6	0	-21	swapper/6	07:04:54	6
1317262	99	32	31,0	cyclictest	0	-21	swapper/7	09:26:05	7
1317262	99	32	31,0	cyclictest	0	-21	swapper/7	09:20:54	7
1317262	99	32	30,1	cyclictest	1663730	-21	ssh	09:50:09	7
1317262	99	32	29,2	cyclictest	1980583	-21	kthreadcore	11:59:12	7
1317262	99	32	29,2	cyclictest	1675224	-21	sensors	09:54:23	7
1317256	99	32	30,2	cyclictest	1505445	-21	kworker/u16:2+events_unbound	09:13:54	6
1317256	99	32	29,2	cyclictest	1408683	-21	kworker/u16:2+events_unbound	08:14:10	6
1317251	99	32	30,2	cyclictest	1628257	-21	kworker/u16:1+flush-8:0	09:56:01	5
1317251	99	32	30,2	cyclictest	1505445	-21	kworker/u16:2+flush-8:0	09:10:37	5
1317262	99	31	30,0	cyclictest	0	-21	swapper/7	10:22:45	7
1317262	99	31	30,0	cyclictest	0	-21	swapper/7	10:22:45	7
1317256	99	31	29,2	cyclictest	1865511	-21	kworker/u16:2+flush-8:0	11:54:41	6
1317256	99	31	29,2	cyclictest	1641024	-21	kworker/u16:2+flush-8:0	09:44:15	6
1317256	99	31	29,2	cyclictest	1525508	-21	kworker/u16:0+flush-8:0	08:54:06	6
1317251	99	31	29,2	cyclictest	1752857	-21	kworker/u16:1+flush-8:0	10:39:42	5
1317251	99	31	27,4	cyclictest	1727281	-21	kworker/u16:4+flush-8:0	11:58:51	5
1836619	2	30	0,1	chrt	1836620	-21	timerandwakeup	10:59:25	7
1836619	2	30	0,1	chrt	1836620	-21	timerandwakeup	10:59:25	7
1317262	99	30	29,0	cyclictest	0	-21	swapper/7	09:30:09	7
1317262	99	30	28,1	cyclictest	1788894	-21	ssh	10:42:04	7
1317256	99	30	28,2	cyclictest	1752857	-21	kworker/u16:1+flush-8:0	11:24:25	6
1317256	99	30	28,2	cyclictest	1359576	-21	kworker/u16:0+flush-8:0	08:08:51	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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