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 Mon Aug 10, 2026 12:43:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1177255	2	70	60,7	sleep4	0	-21	swapper/4	07:06:01	4
1177133	2	56	21,30	sleep7	0	-21	swapper/7	07:04:20	7
1177714	99	46	43,2	cyclictest	1534168	-21	kworker/u16:4+events_unbound	09:58:14	5
1177714	99	43	41,2	cyclictest	1583045	-21	kworker/u16:3+flush-8:0	10:38:43	5
1177714	99	41	38,2	cyclictest	1805991	-21	kworker/u16:4+events_unbound	11:58:15	5
1177321	2	41	30,8	sleep5	0	-21	swapper/5	07:06:58	5
1177717	99	40	35,4	cyclictest	1695693	-21	latency_hist	11:03:13	7
1177714	99	39	37,2	cyclictest	1791925	-21	kworker/u16:0+events_unbound	12:33:14	5
1177714	99	39	37,2	cyclictest	1326766	-21	kworker/u16:3+events_unbound	08:23:13	5
1177714	99	38	35,2	cyclictest	1583045	-21	kworker/u16:3+events_unbound	10:43:16	5
1177714	99	36	34,2	cyclictest	1583045	-21	kworker/u16:3+flush-8:0	11:03:50	5
1177714	99	36	33,2	cyclictest	1150793	-21	kworker/u16:1+flush-8:0	07:33:13	5
1177714	99	35	33,2	cyclictest	1487120	-21	kworker/u16:2+events_unbound	10:05:31	5
1177170	2	35	24,8	sleep6	0	-21	swapper/6	07:04:51	6
1177714	99	34	32,2	cyclictest	1645287	-21	kworker/u16:1+flush-8:0	11:36:46	5
1177714	99	34	32,2	cyclictest	1645287	-21	kworker/u16:1+flush-8:0	11:36:46	5
1177714	99	34	32,2	cyclictest	1583045	-21	kworker/u16:3+events_unbound	10:27:11	5
1177714	99	34	32,2	cyclictest	1436502	-21	kworker/u16:0+events_unbound	09:19:16	5
1177714	99	34	32,2	cyclictest	1326766	-21	kworker/u16:3+events_unbound	09:11:31	5
1177714	99	33	31,2	cyclictest	1791925	-21	kworker/u16:0+events_unbound	11:42:02	5
1177714	99	33	31,2	cyclictest	1732406	-21	kworker/u16:3+events_unbound	11:47:03	5
1177714	99	33	31,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	10:29:30	5
1177714	99	33	31,2	cyclictest	1326766	-21	kworker/u16:3+events_unbound	09:14:31	5
1224370	2	32	0,1	chrt	0	-21	swapper/7	07:28:31	7
1177714	99	32	30,2	cyclictest	1766040	-21	kworker/u16:2+flush-8:0	11:51:27	5
1177714	99	32	30,2	cyclictest	1645287	-21	kworker/u16:1+events_unbound	11:12:27	5
1177714	99	32	30,2	cyclictest	1583045	-21	kworker/u16:3+events_unbound	10:56:59	5
1177714	99	32	30,2	cyclictest	1583045	-21	kworker/u16:3+events_unbound	10:56:59	5
1177714	99	32	30,2	cyclictest	1512541	-21	kworker/u16:3+events_unbound	09:51:31	5
1177717	99	31	28,2	cyclictest	1740233	-21	ssh	11:18:35	7
1177717	99	31	26,4	cyclictest	1438832	-21	latency_hist	09:18:13	7
1177714	99	31	29,2	cyclictest	1645287	-21	kworker/u16:1+flush-8:0	11:23:07	5
1177714	99	31	29,2	cyclictest	1645287	-21	kworker/u16:1+events_unbound	11:15:14	5
1177714	99	31	29,2	cyclictest	1632409	-21	kworker/u16:0+flush-8:0	10:35:30	5
1177714	99	31	28,2	cyclictest	1326766	-21	kworker/u16:3+flush-8:0	08:23:15	5
1177710	99	31	29,2	cyclictest	1150793	-21	kworker/u16:1+flush-8:0	08:18:28	4
1177717	99	30	26,3	cyclictest	125	-21	kswapd0	10:17:05	7
1177717	99	30	26,3	cyclictest	125	-21	kswapd0	10:17:05	7
1177714	99	30	28,2	cyclictest	1805991	-21	kworker/u16:4+events_unbound	12:16:30	5
1177714	99	30	28,2	cyclictest	1805991	-21	kworker/u16:4+events_unbound	12:16:30	5
1177714	99	30	28,2	cyclictest	1791925	-21	kworker/u16:0+flush-8:0	12:31:23	5
1177714	99	30	28,2	cyclictest	1791925	-21	kworker/u16:0+flush-8:0	11:53:58	5
1177714	99	30	28,2	cyclictest	1766040	-21	kworker/u16:2+flush-8:0	12:06:59	5
1177714	99	30	28,2	cyclictest	1632409	-21	kworker/u16:0+events_unbound	10:51:27	5
1177714	99	30	28,2	cyclictest	1570897	-21	kworker/u16:0+flush-8:0	10:11:27	5
1177714	99	30	28,2	cyclictest	1570897	-21	kworker/u16:0+events_unbound	10:15:35	5
1177714	99	30	28,2	cyclictest	1570897	-21	kworker/u16:0+events_unbound	10:15:35	5
1177714	99	30	28,2	cyclictest	1534168	-21	kworker/u16:4+flush-8:0	09:57:47	5
1177714	99	30	28,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	09:46:24	5
1177714	99	30	28,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	09:42:30	5
1177714	99	30	28,2	cyclictest	1176767	-21	kworker/u16:2+events_unbound	07:23:15	5
1177710	99	30	28,2	cyclictest	1766040	-21	kworker/u16:2+events_unbound	11:53:42	4
1177710	99	30	28,2	cyclictest	1645287	-21	kworker/u16:1+flush-8:0	10:43:08	4
1177717	99	29	27,1	cyclictest	1414384	-21	diskmemload	09:26:23	7
1177714	99	29	27,2	cyclictest	1463650	-21	kworker/u16:4+events_unbound	09:31:14	5
1177714	99	29	27,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	10:22:26	5
1177714	99	29	27,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	10:22:26	5
1177714	99	29	27,2	cyclictest	1436502	-21	kworker/u16:0+events_unbound	09:25:26	5
1177710	99	29	27,2	cyclictest	1791925	-21	kworker/u16:0+events_unbound	11:48:27	4
1177710	99	29	27,2	cyclictest	1307973	-21	kworker/u16:2+events_unbound	09:13:44	4
1177710	99	29	27,2	cyclictest	1268868	-21	kworker/u16:3+events_unbound	07:58:28	4
1177717	99	28	25,1	cyclictest	1732405	-21	systemd-run	11:18:13	7
1177714	99	28	26,2	cyclictest	1866664	-21	kworker/u16:1+events_unbound	12:24:32	5
1177714	99	28	26,2	cyclictest	1805991	-21	kworker/u16:4+events_unbound	12:20:30	5
1177710	99	28	26,2	cyclictest	1705506	-21	kworker/u16:0+events_unbound	11:23:40	4
1177710	99	28	26,2	cyclictest	1534168	-21	kworker/u16:4+flush-8:0	10:13:40	4
1177710	99	28	26,2	cyclictest	1534168	-21	kworker/u16:4+flush-8:0	10:13:40	4
1177710	99	28	26,2	cyclictest	1307973	-21	kworker/u16:2+events_unbound	08:53:32	4
1177710	99	28	26,2	cyclictest	1307973	-21	kworker/u16:2+events_unbound	08:23:27	4
1177717	99	27	25,1	cyclictest	1804179	-21	ssh	11:45:39	7
1177714	99	27	25,2	cyclictest	1791925	-21	kworker/u16:0+events_unbound	12:09:06	5
1177714	99	27	25,2	cyclictest	1705506	-21	kworker/u16:0+events_unbound	11:24:27	5
1177714	99	27	25,2	cyclictest	1463650	-21	kworker/u16:4+flush-8:0	09:36:07	5
1177714	99	27	25,2	cyclictest	1463650	-21	kworker/u16:4+flush-8:0	09:36:07	5
1177710	99	27	25,2	cyclictest	1240081	-21	kworker/u16:0+events_unbound	08:33:25	4
1177714	99	26	24,2	cyclictest	1585156	-21	kworker/u16:6+flush-8:0	10:59:55	5
1177714	99	26	23,2	cyclictest	1240081	-21	kworker/u16:0+events_unbound	08:43:15	5
1177710	99	26	24,2	cyclictest	1732406	-21	kworker/u16:3+events_unbound	11:38:27	4
1177710	99	26	24,2	cyclictest	1307973	-21	kworker/u16:2+events_unbound	08:48:30	4
1177717	99	25	20,4	cyclictest	1878844	-21	latency_hist	12:18:12	7
1177717	99	25	20,4	cyclictest	1878844	-21	latency_hist	12:18:12	7
1177714	99	25	24,1	cyclictest	1645287	-21	kworker/u16:1+events_unbound	11:30:34	5
1177714	99	25	23,2	cyclictest	1150793	-21	kworker/u16:1+events_unbound	07:15:48	5
1177710	99	25	23,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	10:28:35	4
1177710	99	25	23,2	cyclictest	1461526	-21	kworker/u16:1+events_unbound	10:23:28	4
1177710	99	25	23,2	cyclictest	1307973	-21	kworker/u16:2+events_unbound	08:28:28	4
1177710	99	25	23,2	cyclictest	1176767	-21	kworker/u16:2+events_unbound	07:23:29	4
1177717	99	24	21,2	cyclictest	1235423	-21	cut	07:33:33	7
1177717	99	23	22,0	cyclictest	0	-21	swapper/7	10:45:47	7
1177717	99	23	21,1	cyclictest	0	-21	swapper/7	10:53:32	7
1177717	99	23	21,1	cyclictest	0	-21	swapper/7	10:53:32	7
1177714	99	23	21,2	cyclictest	1414070	-21	kworker/u16:1+events_unbound	09:04:31	5
1177714	99	23	21,2	cyclictest	1150793	-21	kworker/u16:1+flush-8:0	08:13:41	5
1177714	99	23	21,2	cyclictest	1150793	-21	kworker/u16:1+flush-8:0	08:13:41	5
1177710	99	23	21,2	cyclictest	1585156	-21	kworker/u16:6+events_unbound	10:18:35	4
1177710	99	23	21,2	cyclictest	1585156	-21	kworker/u16:6+events_unbound	10:18:35	4
1424799	2	22	0,1	chrt	1424797	-21	ssh	09:09:50	7
1177714	99	22	19,2	cyclictest	1150793	-21	kworker/u16:1+flush-8:0	07:33:19	5
1177710	99	22	20,2	cyclictest	1805991	-21	kworker/u16:4+events_unbound	12:18:27	4
1177710	99	22	20,2	cyclictest	1766040	-21	kworker/u16:2+events_unbound	11:33:26	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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