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 Sun Aug 09, 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
1700038	2	99	0,1	sleep7	1700040	-21	tr	22:13:44	7
1296110	99	71	69,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	22:13:51	6
2031360	2	61	0,1	sleep7	2031363	-21	cut	00:33:37	7
1295645	2	54	43,8	sleep4	0	-21	swapper/4	19:05:43	4
1295645	2	54	43,8	sleep4	0	-21	swapper/4	19:05:43	4
1295792	2	53	19,29	sleep7	0	-21	swapper/7	19:07:46	7
1295792	2	53	19,29	sleep7	0	-21	swapper/7	19:07:46	7
1296104	99	50	48,2	cyclictest	614225	-21	kworker/u16:6+events_unbound	20:43:48	4
1296104	99	50	48,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	21:38:52	4
1296110	99	49	47,2	cyclictest	1799085	-21	kworker/u16:2+events_unbound	00:03:55	6
1296104	99	49	47,2	cyclictest	1945984	-21	kworker/u16:4+events_unbound	00:28:50	4
1296104	99	49	47,2	cyclictest	1232262	-21	kworker/u16:1+flush-8:0	19:33:49	4
1296104	99	49	47,1	cyclictest	1847425	-21	kworker/u16:0+events_unbound	23:48:34	4
1296104	99	48	46,2	cyclictest	1329470	-21	kworker/u16:3+events_unbound	19:28:49	4
1296104	99	47	44,2	cyclictest	1884422	-21	kworker/u16:1+events_unbound	23:33:51	4
1296110	99	46	44,2	cyclictest	1232262	-21	kworker/u16:1+flush-8:0	19:48:48	6
1296108	99	46	44,2	cyclictest	1847425	-21	kworker/u16:0+events_unbound	00:08:46	5
1296104	99	46	43,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	21:03:32	4
1295532	2	46	21,7	sleep5	0	-21	swapper/5	19:04:07	5
1295532	2	46	21,7	sleep5	0	-21	swapper/5	19:04:07	5
1296110	99	45	43,2	cyclictest	2003279	-21	kworker/u16:1+events_unbound	00:33:45	6
1296110	99	45	43,2	cyclictest	1764024	-21	kworker/u16:0+events_unbound	23:03:47	6
1296110	99	45	42,2	cyclictest	1688972	-21	kworker/u16:1+events_unbound	22:18:35	6
1296110	99	44	42,2	cyclictest	1688972	-21	kworker/u16:1+events_unbound	22:23:34	6
1296110	99	44	42,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	22:28:50	6
1296108	99	44	42,2	cyclictest	1368256	-21	kworker/u16:0+events_unbound	19:43:44	5
1296104	99	44	42,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	22:13:41	4
1296115	99	43	37,5	cyclictest	1763604	-21	latency_hist	22:43:19	7
1296108	99	43	41,2	cyclictest	1847425	-21	kworker/u16:0+events_unbound	23:38:46	5
1296108	99	43	40,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	22:38:34	5
1296108	99	43	40,2	cyclictest	1445753	-21	kworker/u16:2+flush-8:0	20:33:36	5
1296104	99	43	41,2	cyclictest	1847425	-21	kworker/u16:0+events_unbound	00:18:50	4
1296104	99	43	41,2	cyclictest	1688972	-21	kworker/u16:1+flush-8:0	22:28:33	4
1296110	99	42	40,2	cyclictest	1426132	-21	kworker/u16:1+flush-8:0	20:38:47	6
1296104	99	42	40,2	cyclictest	1847425	-21	kworker/u16:0+events_unbound	23:43:51	4
1296110	99	41	39,2	cyclictest	614225	-21	kworker/u16:6+events_unbound	20:08:51	6
1296110	99	41	39,2	cyclictest	1523346	-21	kworker/u16:3+flush-8:0	21:43:34	6
1296108	99	41	39,2	cyclictest	1688972	-21	kworker/u16:1+events_unbound	23:18:32	5
1296108	99	41	38,2	cyclictest	614225	-21	kworker/u16:6+flush-8:0	20:48:33	5
1296104	99	41	39,2	cyclictest	1504046	-21	kworker/u16:1+events_unbound	21:08:33	4
1296104	99	41	39,2	cyclictest	1368256	-21	kworker/u16:0+flush-8:0	20:03:44	4
1727457	2	40	0,0	sleep7	1727458	-21	systemd-run	22:28:18	7
1296108	99	40	38,2	cyclictest	1426132	-21	kworker/u16:1+flush-8:0	20:28:34	5
1296108	99	40	38,2	cyclictest	1276574	-21	kworker/u16:0+flush-8:0	19:13:43	5
1296108	99	40	36,3	cyclictest	1799085	-21	kworker/u16:2+flush-8:0	23:43:49	5
1296104	99	40	38,2	cyclictest	1368256	-21	kworker/u16:0+events_unbound	20:13:48	4
1296104	99	40	38,2	cyclictest	1368256	-21	kworker/u16:0+events_unbound	20:13:48	4
1296110	99	39	37,2	cyclictest	1945984	-21	kworker/u16:4+flush-8:0	00:13:55	6
1296110	99	39	37,2	cyclictest	1688972	-21	kworker/u16:1+flush-8:0	22:43:44	6
1296104	99	39	37,2	cyclictest	614225	-21	kworker/u16:6+flush-8:0	19:23:49	4
1296104	99	39	37,2	cyclictest	1523346	-21	kworker/u16:3+flush-8:0	21:13:48	4
1296104	99	39	37,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	22:38:09	4
1296104	99	39	37,2	cyclictest	1386941	-21	kworker/u16:2+flush-8:0	19:53:37	4
1296115	99	38	36,1	cyclictest	1533027	-21	diskmemload	22:13:18	7
1296110	99	38	36,2	cyclictest	1822071	-21	kworker/u16:3+events_unbound	23:10:20	6
1296110	99	38	36,2	cyclictest	1799085	-21	kworker/u16:2+events_unbound	23:43:35	6
1296110	99	38	36,2	cyclictest	1305978	-21	kworker/u16:2+events_unbound	19:18:35	6
1296104	99	38	35,2	cyclictest	1764024	-21	kworker/u16:0+events_unbound	22:46:57	4
1295607	2	38	28,7	sleep6	0	-21	swapper/6	19:05:13	6
1295607	2	38	28,7	sleep6	0	-21	swapper/6	19:05:13	6
1296110	99	37	35,2	cyclictest	614225	-21	kworker/u16:6+flush-8:0	19:28:42	6
1296110	99	37	35,2	cyclictest	1884422	-21	kworker/u16:1+events_unbound	23:37:12	6
1296110	99	37	35,2	cyclictest	1523346	-21	kworker/u16:3+flush-8:0	21:29:20	6
1296108	99	37	36,1	cyclictest	1822071	-21	kworker/u16:3+events_unbound	23:13:53	5
1296108	99	37	35,2	cyclictest	1523346	-21	kworker/u16:3+flush-8:0	22:13:36	5
1296108	99	37	35,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	21:38:48	5
1296108	99	37	34,2	cyclictest	614225	-21	kworker/u16:6+flush-8:0	20:53:20	5
1296104	99	37	35,2	cyclictest	2003279	-21	kworker/u16:1+events_unbound	00:23:47	4
1296104	99	37	35,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	22:10:40	4
1296115	99	36	34,1	cyclictest	0	-21	swapper/7	19:13:34	7
1296115	99	36	30,5	cyclictest	1445573	-21	latency_hist	20:23:19	7
1296110	99	36	34,2	cyclictest	1557508	-21	kworker/u16:4+events_unbound	21:20:57	6
1296108	99	36	34,2	cyclictest	1847425	-21	kworker/u16:0+events_unbound	00:13:45	5
1296108	99	36	34,2	cyclictest	1799085	-21	kworker/u16:2+events_unbound	00:29:56	5
1296108	99	36	34,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	22:26:08	5
1296104	99	36	34,2	cyclictest	1799085	-21	kworker/u16:2+events_unbound	23:42:52	4
1296104	99	36	34,2	cyclictest	1688972	-21	kworker/u16:1+flush-8:0	23:14:01	4
1296104	99	36	34,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	21:52:04	4
1296104	99	36	34,2	cyclictest	1426132	-21	kworker/u16:1+flush-8:0	20:38:43	4
1296104	99	36	34,2	cyclictest	1305978	-21	kworker/u16:2+events_unbound	19:13:48	4
1296104	99	36	33,2	cyclictest	1688972	-21	kworker/u16:1+events_unbound	22:38:50	4
1296110	99	35	33,2	cyclictest	1764024	-21	kworker/u16:0+events_unbound	22:53:35	6
1296110	99	35	33,2	cyclictest	1688972	-21	kworker/u16:1+events_unbound	23:24:24	6
1296110	99	35	33,2	cyclictest	1445753	-21	kworker/u16:2+events_unbound	20:43:53	6
1296110	99	35	32,2	cyclictest	614225	-21	kworker/u16:6+events_unbound	20:58:33	6
1296110	99	35	32,2	cyclictest	614225	-21	kworker/u16:6+events_unbound	20:58:33	6
1296110	99	35	32,2	cyclictest	1484118	-21	kworker/u16:0+flush-8:0	21:33:51	6
1296110	99	35	32,2	cyclictest	1386941	-21	kworker/u16:2+flush-8:0	19:53:20	6
1296108	99	35	33,2	cyclictest	1799085	-21	kworker/u16:2+flush-8:0	23:23:34	5
1296108	99	35	33,2	cyclictest	1643005	-21	kworker/u16:5+events_unbound	21:58:48	5
1296108	99	35	33,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	22:19:49	5
1296108	99	35	33,2	cyclictest	1523346	-21	kworker/u16:3+events_unbound	22:03:57	5
1296108	99	35	33,2	cyclictest	1504046	-21	kworker/u16:1+flush-8:0	21:18:45	5
1296108	99	35	33,2	cyclictest	1484118	-21	kworker/u16:0+events_unbound	21:03:49	5
1296108	99	35	33,2	cyclictest	1368256	-21	kworker/u16:0+flush-8:0	20:03:40	5
1296108	99	35	32,2	cyclictest	1884422	-21	kworker/u16:1+events_unbound	23:33:20	5
1296104	99	35	33,2	cyclictest	1847425	-21	kworker/u16:0+events_unbound	23:21:01	4
1296104	99	35	33,2	cyclictest	1523346	-21	kworker/u16:3+flush-8:0	21:34:38	4
1296104	99	35	32,2	cyclictest	1945984	-21	kworker/u16:4+events_unbound	00:13:25	4
1884702	2	34	0,1	chrt	1884459	-21	latency_hist	23:33:18	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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