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 50 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
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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