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 Thu Jul 30, 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
1428580	99	55	52,2	cyclictest	1932221	-21	kworker/u16:0+events_unbound	23:54:15	4
1428157	2	48	38,7	sleep5	0	-21	swapper/5	19:07:03	5
1428580	99	44	42,2	cyclictest	1932221	-21	kworker/u16:0+flush-8:0	23:24:30	4
1428580	99	44	42,2	cyclictest	1871609	-21	kworker/u16:3+events_unbound	22:44:29	4
1428580	99	43	40,2	cyclictest	1932221	-21	kworker/u16:0+events_unbound	00:24:11	4
1428580	99	43	40,2	cyclictest	1932221	-21	kworker/u16:0+events_unbound	00:24:11	4
1428580	99	42	39,2	cyclictest	1932221	-21	kworker/u16:0+flush-8:0	22:59:34	4
1419993	2	42	5,31	sleep7	0	-21	swapper/7	19:04:17	7
1428580	99	40	39,1	cyclictest	1665752	-21	kworker/u16:2+events_unbound	22:39:14	4
1428580	99	39	37,2	cyclictest	2114757	-21	kworker/u16:4+flush-8:0	00:19:19	4
1428580	99	39	37,2	cyclictest	1760250	-21	kworker/u16:0+events_unbound	22:00:48	4
1428580	99	38	36,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	22:14:10	4
1428580	99	38	36,2	cyclictest	1539667	-21	kworker/u16:3+events_unbound	20:24:24	4
1428580	99	38	36,2	cyclictest	1539667	-21	kworker/u16:3+events_unbound	20:24:24	4
1428174	2	38	11,7	sleep4	0	-21	swapper/4	19:07:18	4
1428590	99	37	32,4	cyclictest	1895850	-21	latency_hist	22:43:57	7
1428590	99	37	30,5	cyclictest	648	-21	systemd-journal	19:43:57	7
1428590	99	37	30,5	cyclictest	648	-21	systemd-journal	19:43:57	7
1428580	99	37	35,2	cyclictest	1908403	-21	kworker/u16:1+events_unbound	22:51:39	4
1428580	99	37	35,2	cyclictest	1797233	-21	kworker/u16:1+flush-8:0	22:09:31	4
1428167	2	37	26,8	sleep6	0	-21	swapper/6	19:07:12	6
1428580	99	36	34,2	cyclictest	2053732	-21	kworker/u16:3+events_unbound	00:14:27	4
1428580	99	36	34,2	cyclictest	2014822	-21	kworker/u16:2+events_unbound	23:43:32	4
1428580	99	36	34,2	cyclictest	1908403	-21	kworker/u16:1+events_unbound	23:11:39	4
1428580	99	36	34,2	cyclictest	1760250	-21	kworker/u16:0+events_unbound	22:06:23	4
1428580	99	36	34,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	23:06:28	4
1428580	99	36	34,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	23:06:28	4
1428580	99	36	34,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	21:27:35	4
1428580	99	35	34,1	cyclictest	1665752	-21	kworker/u16:2+events_unbound	22:33:44	4
1428580	99	35	33,2	cyclictest	2114757	-21	kworker/u16:4+events_unbound	00:32:59	4
1428580	99	35	33,2	cyclictest	2014822	-21	kworker/u16:2+events_unbound	00:02:47	4
1428580	99	35	33,2	cyclictest	1975314	-21	kworker/u16:2+flush-8:0	23:23:29	4
1428580	99	35	33,2	cyclictest	1932221	-21	kworker/u16:0+flush-8:0	00:07:31	4
1428580	99	35	33,2	cyclictest	1908403	-21	kworker/u16:1+flush-8:0	23:30:40	4
1428580	99	35	33,2	cyclictest	1871609	-21	kworker/u16:3+events_unbound	22:35:34	4
1428580	99	35	33,2	cyclictest	1797233	-21	kworker/u16:1+flush-8:0	22:19:28	4
1428580	99	35	32,2	cyclictest	2014822	-21	kworker/u16:2+events_unbound	23:33:58	4
1428580	99	35	32,2	cyclictest	1975314	-21	kworker/u16:2+flush-8:0	23:14:34	4
1428580	99	34	32,2	cyclictest	2101371	-21	kworker/u16:1+flush-8:0	00:12:38	4
1428580	99	34	32,2	cyclictest	1760250	-21	kworker/u16:0+events_unbound	21:51:04	4
1428580	99	34	32,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	21:32:16	4
1428580	99	34	32,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	21:16:44	4
1428580	99	33	31,2	cyclictest	2053732	-21	kworker/u16:3+events_unbound	00:35:06	4
1428580	99	33	31,2	cyclictest	1932221	-21	kworker/u16:0+events_unbound	23:49:24	4
1428580	99	33	31,2	cyclictest	1908403	-21	kworker/u16:1+events_unbound	23:47:52	4
1428580	99	33	30,2	cyclictest	1665752	-21	kworker/u16:2+flush-8:0	21:23:57	4
1428580	99	32	30,2	cyclictest	1666020	-21	kworker/u16:4+events_unbound	21:43:15	4
1428580	99	32	30,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	22:24:23	4
1428580	99	31	29,2	cyclictest	1665752	-21	kworker/u16:2+flush-8:0	21:36:19	4
1428580	99	31	29,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	22:56:24	4
1428580	99	31	29,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	21:45:24	4
1428580	99	31	29,2	cyclictest	1665752	-21	kworker/u16:2+events_unbound	21:45:24	4
1572647	2	30	0,1	sleep7	0	-21	swapper/7	20:19:16	7
1428580	99	30	28,2	cyclictest	1760250	-21	kworker/u16:0+events_unbound	21:56:40	4
1428580	99	30	28,2	cyclictest	1438196	-21	kworker/u16:4+events_unbound	19:15:07	4
1428580	99	29	27,2	cyclictest	1665752	-21	kworker/u16:2+flush-8:0	21:09:51	4
1875421	2	28	0,1	chrt	1875423	-21	kthreadcore	22:34:18	7
1428580	99	27	25,2	cyclictest	1438196	-21	kworker/u16:4+events_unbound	19:57:08	4
1428590	99	26	21,4	cyclictest	648	-21	systemd-journal	23:38:56	7
1428583	99	26	23,3	cyclictest	1519491	-21	kworker/u16:0+flush-8:0	20:54:23	5
1428580	99	25	23,2	cyclictest	1539667	-21	kworker/u16:3+flush-8:0	20:38:07	4
1428580	99	25	23,2	cyclictest	1490803	-21	kworker/u16:2+events_unbound	19:45:07	4
1428580	99	25	23,2	cyclictest	1408642	-21	kworker/u16:1+events_unbound	19:09:27	4
1859757	2	24	0,0	chrt	108	-21	kcompactd0	22:28:57	7
1428590	99	24	18,5	cyclictest	648	-21	systemd-journal	00:28:56	7
1428590	99	24	18,5	cyclictest	648	-21	systemd-journal	00:28:56	7
1428586	99	24	22,2	cyclictest	2053732	-21	kworker/u16:3+flush-8:0	00:09:58	6
1428580	99	24	22,2	cyclictest	1529539	-21	kworker/u16:1+events_unbound	20:04:12	4
1428580	99	24	22,2	cyclictest	1519491	-21	kworker/u16:0+flush-8:0	21:07:08	4
1428580	99	24	22,2	cyclictest	1490803	-21	kworker/u16:2+events_unbound	19:59:58	4
1428580	99	21	19,2	cyclictest	1539667	-21	kworker/u16:3+events_unbound	20:40:08	4
1428580	99	21	19,2	cyclictest	1519491	-21	kworker/u16:0+flush-8:0	20:19:31	4
1428590	99	20	19,0	cyclictest	0	-21	swapper/7	23:18:27	7
1428590	99	20	19,0	cyclictest	0	-21	swapper/7	22:15:43	7
1428586	99	20	17,2	cyclictest	1519491	-21	kworker/u16:0+flush-8:0	21:04:38	6
1428583	99	20	19,1	cyclictest	1666020	-21	kworker/u16:4+events_unbound	21:35:16	5
1428590	99	19	15,3	cyclictest	1302	-21	snmpd	23:30:39	7
1428590	99	19	14,4	cyclictest	2114344	-21	latency_hist	00:13:57	7
1428590	99	19	14,4	cyclictest	1932180	-21	latency_hist	22:58:57	7
1428580	99	19	17,2	cyclictest	1539667	-21	kworker/u16:3+flush-8:0	20:54:00	4
1428580	99	19	17,2	cyclictest	1519491	-21	kworker/u16:0+events_unbound	21:01:24	4
1428590	99	18	16,1	cyclictest	1665593	-21	diskmemload	00:05:27	7
1428586	99	18	16,2	cyclictest	1666020	-21	kworker/u16:4+flush-8:0	22:03:57	6
1428586	99	18	16,2	cyclictest	1427993	-21	kworker/u16:0+flush-8:0	19:09:13	6
1428583	99	18	14,3	cyclictest	1532726	-21	kthreadcore	19:59:14	5
1428580	99	18	16,2	cyclictest	725563	-21	kworker/u16:3+flush-8:0	19:29:24	4
1428580	99	18	16,2	cyclictest	1438196	-21	kworker/u16:4+events_unbound	19:39:27	4
1428580	99	18	16,2	cyclictest	1438196	-21	kworker/u16:4+events_unbound	19:39:27	4
1428590	99	17	16,0	cyclictest	0	-21	swapper/7	21:51:59	7
1428590	99	17	16,0	cyclictest	0	-21	swapper/7	00:17:19	7
1428590	99	17	14,2	cyclictest	1302	-21	snmpd	19:57:03	7
1428590	99	17	12,4	cyclictest	1847403	-21	latency_hist	22:23:57	7
1428586	99	17	13,3	cyclictest	1519491	-21	kworker/u16:0+flush-8:0	20:39:23	6
1428590	99	16	15,0	cyclictest	0	-21	swapper/7	23:47:15	7
1428590	99	16	15,0	cyclictest	0	-21	swapper/7	23:12:59	7
1428590	99	16	15,0	cyclictest	0	-21	swapper/7	21:23:44	7
1428590	99	16	15,0	cyclictest	0	-21	swapper/7	00:01:35	7
1428590	99	16	13,2	cyclictest	0	-21	swapper/7	21:53:58	7
1428590	99	16	10,5	cyclictest	1907942	-21	latency_hist	22:48:57	7
1428583	99	16	0,15	cyclictest	1544326	-21	cut	20:04:17	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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