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 Dec 02, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1090808	99	60	55,4	cyclictest	1347299	-21	latency_hist	05:27:53	7
1090799	99	54	52,2	cyclictest	386931	-21	kworker/u16:4+flush-8:0	03:37:54	4
1090488	2	53	20,29	sleep7	0	-21	swapper/7	03:22:21	7
1090808	99	52	47,4	cyclictest	1680289	-21	latency_hist	08:12:53	7
1090287	2	48	22,7	sleep5	0	-21	swapper/5	03:19:39	5
1080849	2	41	30,7	sleep6	0	-21	swapper/6	03:18:03	6
1090808	99	40	35,4	cyclictest	1670163	-21	latency_hist	08:07:53	7
1090802	99	40	37,3	cyclictest	1448039	-21	kworker/u16:0+flush-8:0	07:03:18	5
1090802	99	40	37,3	cyclictest	1448039	-21	kworker/u16:0+flush-8:0	07:03:18	5
1090808	99	39	34,4	cyclictest	1660110	-21	latency_hist	08:02:53	7
1090259	2	38	28,7	sleep4	0	-21	swapper/4	03:19:13	4
1090802	99	37	35,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	04:30:46	5
1090802	99	36	34,2	cyclictest	1155820	-21	kworker/u16:4+events_unbound	04:03:25	5
1090808	99	35	29,5	cyclictest	1226207	-21	latency_hist	04:27:54	7
1090804	99	35	33,2	cyclictest	1670560	-21	kworker/u16:4+events_unbound	08:18:17	6
1090802	99	35	32,3	cyclictest	1578335	-21	kworker/u16:5+flush-8:0	07:53:18	5
1090802	99	35	32,2	cyclictest	1558182	-21	kworker/u16:2+events_unbound	07:17:54	5
1090802	99	33	31,2	cyclictest	1428826	-21	kworker/u16:3+events_unbound	06:44:46	5
1090802	99	33	31,2	cyclictest	1296755	-21	kworker/u16:2+flush-8:0	06:51:10	5
1090799	99	33	31,2	cyclictest	1406797	-21	kworker/u16:1+flush-8:0	06:13:19	4
1090802	99	32	30,2	cyclictest	1014463	-21	kworker/u16:3+flush-8:0	04:14:06	5
1090799	99	32	29,2	cyclictest	1275869	-21	kworker/u16:1+flush-8:0	05:07:49	4
1090802	99	31	29,2	cyclictest	1720699	-21	kworker/u16:0+events_unbound	08:49:45	5
1090802	99	31	29,2	cyclictest	1558182	-21	kworker/u16:2+events_unbound	07:17:46	5
1090802	99	31	29,2	cyclictest	1417539	-21	kworker/u16:0+flush-8:0	06:04:14	5
1090802	99	31	29,2	cyclictest	1406797	-21	kworker/u16:1+flush-8:0	05:57:10	5
1090802	99	31	29,2	cyclictest	1296755	-21	kworker/u16:2+events_unbound	05:44:11	5
1090802	99	31	29,2	cyclictest	1296755	-21	kworker/u16:2+events_unbound	05:34:58	5
1090802	99	31	29,2	cyclictest	1296755	-21	kworker/u16:2+events_unbound	05:34:58	5
1090802	99	31	29,2	cyclictest	1155820	-21	kworker/u16:4+events_unbound	03:57:15	5
1090802	99	31	29,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	04:49:07	5
1090802	99	31	29,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	04:49:07	5
1090802	99	31	29,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	04:40:09	5
1090802	99	31	29,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	03:36:07	5
1090799	99	31	29,2	cyclictest	1670560	-21	kworker/u16:4+flush-8:0	08:08:17	4
1090804	99	30	28,2	cyclictest	1014463	-21	kworker/u16:3+flush-8:0	04:58:10	6
1090802	99	30	28,2	cyclictest	1679330	-21	kworker/u16:5+events_unbound	08:19:49	5
1090802	99	30	28,2	cyclictest	1308969	-21	kworker/u16:3+flush-8:0	05:24:18	5
1090802	99	30	28,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	04:11:35	5
1090802	99	30	28,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	03:31:59	5
1090808	99	29	28,0	cyclictest	0	-21	swapper/7	07:40:05	7
1090808	99	29	23,5	cyclictest	1317159	-21	cat	05:12:54	7
1090804	99	29	26,2	cyclictest	1448039	-21	kworker/u16:0+flush-8:0	07:08:08	6
1090804	99	29	26,2	cyclictest	1078631	-21	kworker/u16:5+flush-8:0	04:33:10	6
1090802	99	29	27,2	cyclictest	1589502	-21	kworker/u16:1+events_unbound	08:30:26	5
1090802	99	29	27,2	cyclictest	1428826	-21	kworker/u16:3+events_unbound	07:51:21	5
1090802	99	29	27,2	cyclictest	1428826	-21	kworker/u16:3+events_unbound	07:51:21	5
1090802	99	29	27,2	cyclictest	1397652	-21	kworker/u16:0+events_unbound	05:52:26	5
1090802	99	29	27,2	cyclictest	1308969	-21	kworker/u16:3+flush-8:0	05:18:09	5
1090802	99	29	27,2	cyclictest	1014463	-21	kworker/u16:3+flush-8:0	03:50:26	5
1090808	99	28	27,0	cyclictest	0	-21	swapper/7	06:32:06	7
1090808	99	28	27,0	cyclictest	0	-21	swapper/7	06:26:18	7
1090808	99	28	0,26	cyclictest	589235	-21	systemd-journal	08:32:47	7
1090802	99	28	26,2	cyclictest	1679330	-21	kworker/u16:5+events_unbound	08:11:46	5
1090802	99	28	26,2	cyclictest	1558182	-21	kworker/u16:2+events_unbound	07:36:06	5
1090802	99	28	26,2	cyclictest	1297138	-21	kworker/u16:4+events_unbound	05:06:46	5
1090802	99	28	26,2	cyclictest	1078631	-21	kworker/u16:5+events_unbound	04:25:14	5
1090802	99	28	26,2	cyclictest	1014463	-21	kworker/u16:3+events_unbound	03:25:10	5
1090799	99	28	26,2	cyclictest	1014463	-21	kworker/u16:3+flush-8:0	03:28:21	4
1090808	99	27	26,0	cyclictest	0	-21	swapper/7	06:09:38	7
1090804	99	27	24,2	cyclictest	1014463	-21	kworker/u16:3+flush-8:0	04:23:18	6
1090802	99	27	25,2	cyclictest	1448039	-21	kworker/u16:0+events_unbound	06:30:58	5
1090802	99	27	25,2	cyclictest	1406797	-21	kworker/u16:1+flush-8:0	06:01:13	5
1090802	99	27	25,2	cyclictest	1308969	-21	kworker/u16:3+flush-8:0	05:14:13	5
1090802	99	27	25,2	cyclictest	1296755	-21	kworker/u16:2+flush-8:0	06:22:30	5
1090802	99	27	25,2	cyclictest	1296755	-21	kworker/u16:2+flush-8:0	06:22:30	5
1090802	99	27	25,2	cyclictest	1296755	-21	kworker/u16:2+events_unbound	05:39:22	5
1090802	99	27	25,2	cyclictest	1014463	-21	kworker/u16:3+events_unbound	04:53:58	5
1090808	99	26	22,3	cyclictest	1445844	-21	kthreadcore	06:13:15	7
1090802	99	26	24,2	cyclictest	1589502	-21	kworker/u16:1+events_unbound	08:24:50	5
1090802	99	26	24,2	cyclictest	1558182	-21	kworker/u16:2+flush-8:0	08:03:07	5
1090802	99	26	24,2	cyclictest	1498690	-21	kworker/u16:1+events_unbound	07:11:46	5
1090802	99	26	24,2	cyclictest	1428826	-21	kworker/u16:3+events_unbound	07:44:58	5
1090802	99	26	24,2	cyclictest	1227428	-21	kworker/u16:0+flush-8:0	05:09:58	5
1090802	99	26	24,2	cyclictest	1227428	-21	kworker/u16:0+events_unbound	04:34:17	5
1090802	99	26	24,2	cyclictest	1155820	-21	kworker/u16:4+flush-8:0	04:00:41	5
1090799	99	26	24,2	cyclictest	1679330	-21	kworker/u16:5+flush-8:0	08:23:09	4
1090799	99	26	24,2	cyclictest	1448039	-21	kworker/u16:0+flush-8:0	06:23:21	4
1090799	99	26	24,2	cyclictest	1275869	-21	kworker/u16:1+events_unbound	05:08:18	4
1090808	99	25	25,0	cyclictest	0	-21	swapper/7	07:44:21	7
1090808	99	25	24,0	cyclictest	0	-21	swapper/7	08:21:09	7
1090808	99	25	24,0	cyclictest	0	-21	swapper/7	07:27:41	7
1090802	99	25	23,2	cyclictest	1720737	-21	kworker/u16:2+events_unbound	08:34:38	5
1090802	99	25	23,2	cyclictest	1720737	-21	kworker/u16:2+events_unbound	08:34:38	5
1090802	99	25	23,2	cyclictest	1687006	-21	kworker/u16:6+events_unbound	08:45:17	5
1090802	99	25	23,2	cyclictest	1589502	-21	kworker/u16:1+flush-8:0	08:14:58	5
1090802	99	25	23,2	cyclictest	1589502	-21	kworker/u16:1+events_unbound	07:28:25	5
1090802	99	25	23,2	cyclictest	1578335	-21	kworker/u16:5+flush-8:0	07:59:11	5
1090799	99	25	23,2	cyclictest	1078631	-21	kworker/u16:5+flush-8:0	04:12:53	4
1090808	99	24	23,0	cyclictest	0	-21	swapper/7	05:37:31	7
1090808	99	24	23,0	cyclictest	0	-21	swapper/7	05:37:31	7
1090808	99	24	23,0	cyclictest	0	-21	swapper/7	05:03:54	7
1090808	99	24	18,4	cyclictest	589235	-21	systemd-journal	03:52:06	7
1090804	99	24	22,2	cyclictest	386931	-21	kworker/u16:4+events_unbound	03:33:09	6
1090802	99	24	22,2	cyclictest	1428826	-21	kworker/u16:3+events_unbound	07:27:38	5
1090802	99	24	22,2	cyclictest	1377477	-21	kworker/u16:4+flush-8:0	06:08:19	5
1090802	99	24	22,2	cyclictest	1377477	-21	kworker/u16:4+events_unbound	06:17:05	5
1090802	99	24	22,2	cyclictest	1125127	-21	kworker/u16:2+events_unbound	03:45:38	5
1090799	99	24	22,2	cyclictest	1428826	-21	kworker/u16:3+flush-8:0	06:38:09	4
1090799	99	24	21,2	cyclictest	1125127	-21	kworker/u16:2+flush-8:0	04:39:50	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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