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 Fri Feb 06, 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
1471501	2	182	0,13	sleep6	0	-21	swapper/6	19:01:51	6
2187983	2	98	0,0	sleep6	0	-21	swapper/6	00:26:37	6
1842959	2	96	0,1	sleep6	0	-21	swapper/6	22:01:32	6
1472073	2	59	48,8	sleep5	0	-21	swapper/5	19:04:31	5
1472490	99	50	47,2	cyclictest	1601564	-21	kworker/u16:1+flush-8:0	20:46:45	6
1472490	99	45	43,2	cyclictest	755113	-21	kworker/u16:3+flush-8:0	19:11:44	6
1472489	99	45	43,2	cyclictest	1828178	-21	kworker/u16:4+flush-8:0	22:06:15	5
6265	89	44	0,37	rtkit-daemon	0	-21	swapper/4	19:02:23	4
1472490	99	42	39,2	cyclictest	1621252	-21	kworker/u16:3+flush-8:0	21:06:47	6
1471950	2	42	7,31	sleep7	0	-21	swapper/7	19:02:49	7
1472490	99	41	39,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	22:08:39	6
1472490	99	41	39,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:20:39	6
1472490	99	41	39,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:20:39	6
1472490	99	40	38,2	cyclictest	2121024	-21	kworker/u16:3+events_unbound	00:18:06	6
1472489	99	40	38,2	cyclictest	1942021	-21	kworker/u16:3+events_unbound	22:53:42	5
1472494	99	39	33,5	cyclictest	2038858	-21	latency_hist	23:26:15	7
1472494	99	39	33,5	cyclictest	2038858	-21	latency_hist	23:26:15	7
1472494	99	39	33,5	cyclictest	1792934	-21	latency_hist	21:41:16	7
1472490	99	39	37,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	22:22:02	6
1472489	99	39	37,2	cyclictest	1942021	-21	kworker/u16:3+events_unbound	23:02:43	5
1472490	99	38	36,2	cyclictest	2096029	-21	kworker/u16:0+events_unbound	00:35:35	6
1472490	99	38	36,2	cyclictest	2096029	-21	kworker/u16:0+events_unbound	00:02:55	6
1472490	99	38	36,2	cyclictest	2096029	-21	kworker/u16:0+events_unbound	00:02:55	6
1472490	99	38	36,2	cyclictest	1942021	-21	kworker/u16:3+events_unbound	23:18:47	6
1472490	99	38	36,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:44:51	6
1472490	99	38	36,2	cyclictest	1621252	-21	kworker/u16:3+events_unbound	21:54:02	6
1472489	99	38	36,2	cyclictest	1913999	-21	kworker/u16:1+events_unbound	22:45:43	5
1472489	99	38	36,2	cyclictest	1913999	-21	kworker/u16:1+events_unbound	22:45:43	5
1472489	99	38	36,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:01:43	5
1472489	99	38	36,2	cyclictest	1621252	-21	kworker/u16:3+events_unbound	21:32:51	5
1472489	99	38	35,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	22:06:17	5
1472490	99	37	35,2	cyclictest	1942021	-21	kworker/u16:3+events_unbound	23:03:38	6
1472490	99	37	35,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:29:10	6
1472490	99	37	35,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:29:10	6
1472490	99	37	35,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	22:49:34	6
1472490	99	37	35,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:38:51	6
1472490	99	37	35,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	00:00:34	6
1472489	99	37	35,2	cyclictest	2121024	-21	kworker/u16:3+events_unbound	00:19:35	5
1472489	99	37	35,2	cyclictest	2108893	-21	kworker/u16:1+events_unbound	00:33:06	5
1472489	99	37	35,2	cyclictest	2096029	-21	kworker/u16:0+events_unbound	00:24:34	5
1472489	99	37	35,2	cyclictest	2026847	-21	kworker/u16:0+events_unbound	23:23:42	5
1472489	99	37	35,2	cyclictest	2026847	-21	kworker/u16:0+events_unbound	23:23:42	5
1472489	99	37	35,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:29:30	5
1472489	99	37	35,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:08:30	5
1472494	99	36	29,6	cyclictest	650	-21	systemd-journal	21:56:11	7
1472490	99	36	34,2	cyclictest	2096029	-21	kworker/u16:0+events_unbound	23:53:55	6
1472490	99	36	34,2	cyclictest	2048661	-21	kworker/u16:1+events_unbound	23:43:03	6
1472490	99	36	34,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:00:38	6
1472490	99	36	34,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	22:40:03	6
1472490	99	36	34,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:29:58	6
1472490	99	36	34,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	23:50:58	6
1472490	99	36	34,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	23:09:18	6
1472490	99	36	34,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:32:08	6
1472490	99	36	33,2	cyclictest	1582453	-21	kworker/u16:0+events_unbound	20:21:18	6
1472489	99	36	34,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:35:02	5
1472489	99	36	34,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:19:46	5
1472489	99	36	34,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:19:46	5
1472489	99	36	34,2	cyclictest	1621252	-21	kworker/u16:3+events_unbound	21:24:39	5
1472490	99	35	33,2	cyclictest	1913999	-21	kworker/u16:1+events_unbound	22:42:55	6
1472490	99	35	33,2	cyclictest	1913999	-21	kworker/u16:1+events_unbound	22:42:55	6
1472490	99	35	33,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:33:42	6
1472490	99	35	33,2	cyclictest	1866828	-21	kworker/u16:3+events_unbound	22:13:03	6
1472490	99	35	33,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	23:38:15	6
1472490	99	35	33,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	23:13:46	6
1472490	99	35	33,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	00:07:17	6
1472489	99	35	33,2	cyclictest	2096029	-21	kworker/u16:0+flush-8:0	23:46:54	5
1472489	99	35	33,2	cyclictest	2096029	-21	kworker/u16:0+events_unbound	00:08:54	5
1472489	99	35	33,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:14:54	5
1472490	99	34	32,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	22:27:11	6
1472490	99	34	32,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:12:26	6
1472490	99	34	32,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	22:54:23	6
1472490	99	34	29,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	21:48:41	6
1472489	99	34	32,2	cyclictest	2121024	-21	kworker/u16:3+events_unbound	00:29:47	5
1472489	99	34	32,2	cyclictest	1890557	-21	kworker/u16:0+events_unbound	22:30:11	5
1472489	99	34	32,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:38:10	5
1472489	99	34	32,2	cyclictest	1688755	-21	kworker/u16:2+events_unbound	22:24:54	5
1472490	99	33	31,2	cyclictest	2121024	-21	kworker/u16:3+events_unbound	00:14:07	6
1472490	99	33	31,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:23:19	6
1472490	99	33	31,2	cyclictest	1621252	-21	kworker/u16:3+events_unbound	20:28:18	6
1472489	99	33	31,2	cyclictest	1942021	-21	kworker/u16:3+events_unbound	23:18:49	5
1472489	99	33	31,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:27:42	5
1472489	99	33	31,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	23:27:42	5
1472489	99	33	31,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	22:33:09	5
1472489	99	33	31,2	cyclictest	1688755	-21	kworker/u16:2+flush-8:0	21:47:22	5
1472494	99	32	26,5	cyclictest	2099027	-21	latency_hist	23:51:16	7
1472490	99	32	30,2	cyclictest	1913999	-21	kworker/u16:1+events_unbound	22:35:00	6
1472490	99	32	30,2	cyclictest	1828178	-21	kworker/u16:4+events_unbound	22:18:47	6
1472490	99	32	30,2	cyclictest	1828178	-21	kworker/u16:4+events_unbound	22:00:54	6
1472490	99	32	30,2	cyclictest	1621252	-21	kworker/u16:3+events_unbound	21:00:27	6
1472490	99	32	30,2	cyclictest	1582453	-21	kworker/u16:0+events_unbound	20:16:50	6
1472489	99	32	30,2	cyclictest	1942021	-21	kworker/u16:3+events_unbound	23:11:11	5
1472490	99	31	29,2	cyclictest	2121024	-21	kworker/u16:3+events_unbound	00:24:29	6
1472490	99	31	29,2	cyclictest	2026847	-21	kworker/u16:0+events_unbound	23:24:19	6
1472490	99	31	29,2	cyclictest	2026847	-21	kworker/u16:0+events_unbound	23:24:19	6
1472489	99	31	29,2	cyclictest	1899836	-21	kworker/u16:5+events_unbound	22:47:37	5
1472489	99	31	29,2	cyclictest	1698673	-21	kworker/u16:0+events_unbound	21:44:21	5
1472489	99	31	27,3	cyclictest	1544176	-21	kworker/u16:2+flush-8:0	19:56:26	5
1472490	99	30	28,2	cyclictest	765737	-21	kworker/u16:4+events_unbound	19:18:16	6
1472489	99	30	28,2	cyclictest	2048661	-21	kworker/u16:1+events_unbound	23:40:09	5
1472489	99	30	28,2	cyclictest	1601564	-21	kworker/u16:1+events_unbound	20:37:27	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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