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 Wed Jun 03, 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
1428155	2	57	47,7	sleep4	0	-21	swapper/4	07:05:06	4
1427968	2	49	22,8	sleep5	0	-21	swapper/5	07:02:26	5
1428558	99	48	45,2	cyclictest	1566072	-21	kworker/u16:2+flush-8:0	08:26:42	6
1428551	99	41	39,2	cyclictest	1820729	-21	kworker/u16:3+flush-8:0	10:42:08	4
1427323	2	40	2,31	sleep7	0	-21	swapper/7	07:02:12	7
1428554	99	38	36,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	09:42:39	5
1428560	99	37	0,35	cyclictest	124	-21	kswapd0	12:06:57	7
1428554	99	37	35,2	cyclictest	1820729	-21	kworker/u16:3+events_unbound	10:42:06	5
1428554	99	34	32,2	cyclictest	2086959	-21	kworker/u16:4+events_unbound	12:07:04	5
1428560	99	33	28,4	cyclictest	1808498	-21	latency_hist	10:06:42	7
1428558	99	32	29,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	11:11:42	6
1428554	99	32	30,2	cyclictest	2124381	-21	kworker/u16:3+events_unbound	12:32:09	5
1428554	99	32	30,2	cyclictest	1820729	-21	kworker/u16:3+events_unbound	10:37:09	5
1428043	2	32	22,7	sleep6	0	-21	swapper/6	07:03:32	6
1428560	99	31	26,4	cyclictest	1499456	-21	latency_hist	07:41:43	7
1428558	99	31	29,2	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	09:42:07	6
1428554	99	31	29,2	cyclictest	2124382	-21	kworker/u16:4+events_unbound	12:29:58	5
1428554	99	31	29,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	12:04:34	5
1428554	99	31	29,2	cyclictest	1905831	-21	kworker/u16:4+events_unbound	10:47:38	5
1428554	99	31	29,2	cyclictest	1735445	-21	kworker/u16:1+events_unbound	09:52:55	5
1428554	99	31	29,2	cyclictest	1409157	-21	kworker/u16:3+events_unbound	07:18:41	5
1428551	99	31	29,2	cyclictest	1675457	-21	kworker/u16:4+events_unbound	09:17:07	4
1428558	99	30	28,2	cyclictest	1735445	-21	kworker/u16:1+flush-8:0	10:02:21	6
1428558	99	30	28,2	cyclictest	1653755	-21	kworker/u16:2+events_unbound	09:07:07	6
1428554	99	30	28,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	12:21:18	5
1428554	99	30	28,2	cyclictest	1841811	-21	kworker/u16:0+events_unbound	10:30:47	5
1428554	99	30	28,2	cyclictest	1841811	-21	kworker/u16:0+events_unbound	10:25:07	5
1428554	99	30	28,2	cyclictest	1735445	-21	kworker/u16:1+events_unbound	10:17:01	5
1428554	99	30	28,2	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	10:10:55	5
1428554	99	30	28,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	09:10:38	5
1428554	99	29	27,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	11:28:17	5
1428554	99	29	27,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	11:25:38	5
1428554	99	29	27,2	cyclictest	1566072	-21	kworker/u16:2+events_unbound	08:39:16	5
1428554	99	29	27,2	cyclictest	1499647	-21	kworker/u16:1+events_unbound	07:51:17	5
1428554	99	29	27,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	08:28:25	5
1428554	99	29	27,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:32:10	5
1428551	99	29	27,2	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	08:12:12	4
2062345	2	28	0,1	chrt	2062346	-21	ssh	11:51:01	7
1428554	99	28	26,2	cyclictest	2124382	-21	kworker/u16:4+events_unbound	12:24:53	5
1428554	99	28	26,2	cyclictest	1987095	-21	kworker/u16:3+flush-8:0	12:01:05	5
1428554	99	28	26,2	cyclictest	1987095	-21	kworker/u16:3+events_unbound	11:41:50	5
1428554	99	28	26,2	cyclictest	1987095	-21	kworker/u16:3+events_unbound	11:33:33	5
1428554	99	28	26,2	cyclictest	1987095	-21	kworker/u16:3+events_unbound	11:33:33	5
1428554	99	28	26,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	11:20:30	5
1428554	99	28	26,2	cyclictest	1820729	-21	kworker/u16:3+events_unbound	10:12:37	5
1428554	99	28	26,2	cyclictest	1735445	-21	kworker/u16:1+events_unbound	09:57:38	5
1428554	99	28	26,2	cyclictest	1653755	-21	kworker/u16:2+events_unbound	10:03:06	5
1428554	99	28	26,2	cyclictest	1566072	-21	kworker/u16:2+events_unbound	08:18:25	5
1428554	99	28	26,2	cyclictest	1409157	-21	kworker/u16:3+events_unbound	07:24:25	5
1428554	99	28	25,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:41:47	5
1428551	99	28	26,2	cyclictest	1624737	-21	kworker/u16:3+flush-8:0	09:01:57	4
1428554	99	27	25,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	11:06:14	5
1428554	99	27	25,2	cyclictest	1882796	-21	kworker/u16:1+flush-8:0	10:52:28	5
1428554	99	27	25,2	cyclictest	1882796	-21	kworker/u16:1+events_unbound	11:08:46	5
1428554	99	27	25,2	cyclictest	1820729	-21	kworker/u16:3+events_unbound	10:32:00	5
1428554	99	27	25,2	cyclictest	1653755	-21	kworker/u16:2+flush-8:0	09:47:07	5
1428554	99	27	25,2	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	08:12:24	5
1428554	99	27	25,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	08:55:08	5
1428554	99	27	25,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	08:55:08	5
1428554	99	27	25,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	08:25:55	5
1428558	99	26	24,2	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	09:16:54	6
1428554	99	26	24,2	cyclictest	2105717	-21	kworker/u16:2+events_unbound	12:16:33	5
1428554	99	26	24,2	cyclictest	2105717	-21	kworker/u16:2+events_unbound	12:16:33	5
1428554	99	26	24,2	cyclictest	1932149	-21	kworker/u16:0+flush-8:0	11:37:02	5
1428554	99	26	24,2	cyclictest	1675032	-21	kworker/u16:1+flush-8:0	09:14:31	5
1428554	99	26	24,2	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	09:03:56	5
1428554	99	26	24,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	09:32:53	5
1428554	99	26	24,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:39:04	5
1428554	99	26	24,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:14:56	5
1428554	99	25	24,1	cyclictest	1442202	-21	kworker/u16:0+flush-8:0	07:57:47	5
1428554	99	25	23,2	cyclictest	1932149	-21	kworker/u16:0+flush-8:0	11:12:03	5
1428554	99	25	23,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	10:58:07	5
1428554	99	25	23,2	cyclictest	1566072	-21	kworker/u16:2+flush-8:0	08:50:27	5
1428554	99	25	23,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	08:33:48	5
1428554	99	25	23,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:29:16	5
1428554	99	25	23,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:08:16	5
1428554	99	24	22,2	cyclictest	1735445	-21	kworker/u16:1+flush-8:0	09:37:41	5
1428554	99	24	22,2	cyclictest	1566072	-21	kworker/u16:2+events_unbound	08:44:01	5
1428554	99	24	22,2	cyclictest	1499647	-21	kworker/u16:1+events_unbound	08:02:49	5
1428554	99	24	22,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	09:28:07	5
1428554	99	24	22,2	cyclictest	1442202	-21	kworker/u16:0+events_unbound	09:28:07	5
1428554	99	24	22,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	08:10:40	5
1428554	99	24	22,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:54:44	5
1428558	99	23	21,2	cyclictest	1409158	-21	kworker/u16:4+flush-8:0	07:46:43	6
1428560	99	22	0,20	cyclictest	2050640	-21	latency_hist	11:46:42	7
1428560	99	22	0,20	cyclictest	1796376	-21	latency_hist	10:01:43	7
1428558	99	22	20,2	cyclictest	1409157	-21	kworker/u16:3+events_unbound	07:37:13	6
1428554	99	22	20,2	cyclictest	1675457	-21	kworker/u16:4+events_unbound	09:23:55	5
1428558	99	21	19,2	cyclictest	1820729	-21	kworker/u16:3+flush-8:0	10:32:23	6
1428558	99	21	19,2	cyclictest	1675457	-21	kworker/u16:4+flush-8:0	09:31:37	6
1428558	99	21	19,2	cyclictest	1675457	-21	kworker/u16:4+flush-8:0	09:31:37	6
1428558	99	21	19,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	07:47:07	6
1428551	99	21	19,2	cyclictest	1409158	-21	kworker/u16:4+events_unbound	08:41:58	4
1428560	99	20	17,1	cyclictest	2035384	-21	sed	11:37:07	7
1428560	99	20	15,4	cyclictest	1747856	-21	latency_hist	09:41:42	7
1428554	99	20	18,2	cyclictest	1932149	-21	kworker/u16:0+events_unbound	11:52:17	5
1428554	99	20	18,2	cyclictest	1624737	-21	kworker/u16:3+flush-8:0	08:59:20	5
1428558	99	19	18,1	cyclictest	0	-21	swapper/6	11:53:15	6
1428558	99	19	17,2	cyclictest	1987095	-21	kworker/u16:3+flush-8:0	11:21:37	6
1428558	99	19	17,2	cyclictest	1932149	-21	kworker/u16:0+flush-8:0	12:22:03	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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