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 Tue Aug 25, 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
1246135	2	61	35,8	sleep4	0	-21	swapper/4	19:03:37	4
1246135	2	61	35,8	sleep4	0	-21	swapper/4	19:03:37	4
1246387	2	54	19,30	sleep7	0	-21	swapper/7	19:07:09	7
1246387	2	54	19,30	sleep7	0	-21	swapper/7	19:07:09	7
1859429	2	47	0,0	sleep7	1859430	-21	rm	23:49:07	7
1246693	99	45	39,5	cyclictest	1858132	-21	latency_hist	23:47:17	7
1237114	2	43	32,7	sleep5	0	-21	swapper/5	19:02:26	5
1237114	2	43	32,7	sleep5	0	-21	swapper/5	19:02:26	5
1246693	99	42	36,5	cyclictest	1531146	-21	latency_hist	21:27:17	7
1246684	99	40	38,2	cyclictest	1873128	-21	kworker/u16:4+flush-8:0	00:02:17	5
1246684	99	34	32,2	cyclictest	1518503	-21	kworker/u16:1+events_unbound	22:18:28	5
1246684	99	34	31,2	cyclictest	1279473	-21	kworker/u16:3+events_unbound	19:47:17	5
1246693	99	31	26,4	cyclictest	1897027	-21	latency_hist	00:07:16	7
1246692	99	31	29,2	cyclictest	1923880	-21	kworker/u16:1+flush-8:0	00:32:17	6
1246684	99	31	29,2	cyclictest	1747220	-21	kworker/u16:0+events_unbound	23:03:19	5
1246137	2	31	21,7	sleep6	0	-21	swapper/6	19:03:39	6
1246137	2	31	21,7	sleep6	0	-21	swapper/6	19:03:39	6
1246692	99	30	23,7	cyclictest	1853023	-21	kworker/u16:3+events_unbound	23:51:02	6
1934655	2	29	0,1	chrt	1934656	-21	ssh	00:24:50	7
1246684	99	29	26,2	cyclictest	1347464	-21	kworker/u16:4+flush-8:0	20:22:34	5
1246682	99	29	27,2	cyclictest	1465769	-21	kworker/u16:2+flush-8:0	21:37:32	4
1246692	99	28	26,2	cyclictest	1600870	-21	kworker/u16:2+flush-8:0	22:42:44	6
1246684	99	28	25,2	cyclictest	1465769	-21	kworker/u16:2+flush-8:0	21:42:23	5
1246682	99	28	24,3	cyclictest	1600870	-21	kworker/u16:2+flush-8:0	22:27:32	4
1246684	99	27	25,2	cyclictest	1473597	-21	kworker/u16:3+events_unbound	21:48:07	5
1246684	99	27	25,2	cyclictest	1256605	-21	kworker/u16:1+events_unbound	19:22:47	5
1246682	99	27	25,2	cyclictest	1793517	-21	kworker/u16:2+events_unbound	23:46:09	4
1246692	99	25	23,2	cyclictest	1612980	-21	kworker/u16:3+events_unbound	22:01:42	6
1246692	99	25	23,2	cyclictest	1600870	-21	kworker/u16:2+events_unbound	22:08:11	6
1246692	99	25	23,2	cyclictest	1454179	-21	kworker/u16:0+events_unbound	20:54:54	6
1246684	99	25	22,2	cyclictest	1347464	-21	kworker/u16:4+flush-8:0	20:17:35	5
1246682	99	25	22,2	cyclictest	1279473	-21	kworker/u16:3+events_unbound	20:07:36	4
1246693	99	24	23,0	cyclictest	0	-21	swapper/7	21:06:54	7
1246693	99	24	23,0	cyclictest	0	-21	swapper/7	20:20:39	7
1246692	99	24	22,2	cyclictest	1711248	-21	kworker/u16:1+flush-8:0	23:22:48	6
1246682	99	24	22,2	cyclictest	1908695	-21	kworker/u16:2+events_unbound	00:12:15	4
1246682	99	24	22,2	cyclictest	1908695	-21	kworker/u16:2+events_unbound	00:12:15	4
1246682	99	24	22,2	cyclictest	1405351	-21	kworker/u16:1+flush-8:0	20:27:33	4
1429031	2	23	0,1	chrt	0	-21	swapper/5	20:37:36	5
1246693	99	23	22,0	cyclictest	0	-21	swapper/7	19:08:35	7
1246692	99	23	8,15	cyclictest	1600870	-21	kworker/u16:2+events_unbound	21:53:45	6
1246692	99	23	21,2	cyclictest	1853023	-21	kworker/u16:3+events_unbound	23:46:05	6
1246684	99	23	21,2	cyclictest	1615128	-21	kworker/u16:4+flush-8:0	22:37:36	5
1246693	99	22	21,0	cyclictest	0	-21	swapper/7	22:34:08	7
1246693	99	22	21,0	cyclictest	0	-21	swapper/7	19:45:51	7
1246693	99	22	21,0	cyclictest	0	-21	swapper/7	19:13:11	7
1246693	99	22	21,0	cyclictest	0	-21	swapper/7	00:09:11	7
1246693	99	22	21,0	cyclictest	0	-21	swapper/7	00:09:11	7
1246693	99	22	20,1	cyclictest	0	-21	swapper/7	21:57:32	7
1246693	99	22	20,1	cyclictest	0	-21	swapper/7	21:08:58	7
1246693	99	22	20,1	cyclictest	0	-21	swapper/7	20:03:34	7
1246692	99	22	20,2	cyclictest	1853023	-21	kworker/u16:3+events_unbound	00:06:48	6
1246692	99	22	20,2	cyclictest	1518503	-21	kworker/u16:1+events_unbound	22:03:45	6
1246692	99	22	20,2	cyclictest	1454179	-21	kworker/u16:0+events_unbound	21:06:22	6
1246692	99	22	20,2	cyclictest	1405351	-21	kworker/u16:1+events_unbound	21:11:01	6
1246692	99	22	20,2	cyclictest	1347464	-21	kworker/u16:4+flush-8:0	20:17:17	6
1246692	99	22	20,2	cyclictest	1337814	-21	kworker/u16:2+events_unbound	20:51:15	6
1246692	99	22	20,2	cyclictest	1279473	-21	kworker/u16:3+events_unbound	20:11:56	6
1246684	99	22	20,2	cyclictest	1711248	-21	kworker/u16:1+flush-8:0	22:57:32	5
1246684	99	22	20,2	cyclictest	1615128	-21	kworker/u16:4+events_unbound	23:12:42	5
1246682	99	22	20,2	cyclictest	1873128	-21	kworker/u16:4+events_unbound	00:00:29	4
1246682	99	22	20,2	cyclictest	1711248	-21	kworker/u16:1+events_unbound	23:27:31	4
1246682	99	22	20,2	cyclictest	1600870	-21	kworker/u16:2+flush-8:0	22:47:38	4
1246682	99	22	20,2	cyclictest	1405351	-21	kworker/u16:1+events_unbound	20:59:35	4
1246682	99	22	20,2	cyclictest	1405351	-21	kworker/u16:1+events_unbound	20:59:35	4
1246682	99	22	20,2	cyclictest	1279473	-21	kworker/u16:3+flush-8:0	19:55:55	4
1246693	99	21	20,0	cyclictest	0	-21	swapper/7	23:07:34	7
1246693	99	21	20,0	cyclictest	0	-21	swapper/7	22:17:04	7
1246693	99	21	20,0	cyclictest	0	-21	swapper/7	22:17:04	7
1246693	99	21	20,0	cyclictest	0	-21	swapper/7	22:06:18	7
1246693	99	21	20,0	cyclictest	0	-21	swapper/7	20:38:07	7
1246693	99	21	20,0	cyclictest	0	-21	swapper/7	19:29:51	7
1246693	99	21	15,5	cyclictest	1376609	-21	latency_hist	20:12:17	7
1246692	99	21	19,2	cyclictest	1711248	-21	kworker/u16:1+flush-8:0	23:34:06	6
1246692	99	21	19,2	cyclictest	1711248	-21	kworker/u16:1+events_unbound	23:01:57	6
1246692	99	21	19,2	cyclictest	1465769	-21	kworker/u16:2+flush-8:0	21:27:44	6
1246692	99	21	19,2	cyclictest	1465769	-21	kworker/u16:2+events_unbound	21:37:08	6
1246692	99	21	19,2	cyclictest	1465769	-21	kworker/u16:2+events_unbound	21:37:08	6
1246692	99	21	19,2	cyclictest	1337814	-21	kworker/u16:2+events_unbound	20:37:59	6
1246692	99	21	19,2	cyclictest	1337814	-21	kworker/u16:2+events_unbound	20:36:43	6
1246692	99	21	19,2	cyclictest	1337814	-21	kworker/u16:2+events_unbound	20:30:46	6
1246692	99	21	19,2	cyclictest	1337814	-21	kworker/u16:2+events_unbound	19:56:20	6
1246692	99	21	19,2	cyclictest	1279473	-21	kworker/u16:3+events_unbound	19:35:23	6
1246684	99	21	19,2	cyclictest	1793517	-21	kworker/u16:2+flush-8:0	23:27:51	5
1246684	99	21	19,2	cyclictest	1615128	-21	kworker/u16:4+events_unbound	22:27:12	5
1246684	99	21	19,2	cyclictest	1600870	-21	kworker/u16:2+flush-8:0	22:47:35	5
1246684	99	21	18,2	cyclictest	1600870	-21	kworker/u16:2+flush-8:0	22:27:41	5
1246684	99	21	18,2	cyclictest	1337814	-21	kworker/u16:2+flush-8:0	19:57:33	5
1246682	99	21	19,2	cyclictest	1793517	-21	kworker/u16:2+events_unbound	23:32:54	4
1246682	99	21	19,2	cyclictest	1711248	-21	kworker/u16:1+events_unbound	22:43:51	4
1246682	99	21	19,2	cyclictest	1518503	-21	kworker/u16:1+events_unbound	22:18:11	4
1246682	99	21	19,2	cyclictest	1454179	-21	kworker/u16:0+events_unbound	21:06:47	4
1246682	99	21	19,2	cyclictest	1337814	-21	kworker/u16:2+events_unbound	20:18:05	4
1246682	99	21	19,2	cyclictest	1279473	-21	kworker/u16:3+events_unbound	19:26:55	4
1246682	99	21	19,2	cyclictest	1206719	-21	kworker/u16:4+events_unbound	19:33:55	4
1246682	99	21	18,2	cyclictest	1600870	-21	kworker/u16:2+events_unbound	22:07:18	4
1246693	99	20	19,0	cyclictest	0	-21	swapper/7	20:57:59	7
1246693	99	20	19,0	cyclictest	0	-21	swapper/7	20:57:59	7
1246693	99	20	19,0	cyclictest	0	-21	swapper/7	19:57:32	7
1246693	99	20	19,0	cyclictest	0	-21	swapper/7	19:57:07	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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