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 23, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1334496	2	54	43,8	sleep5	0	-21	swapper/5	07:08:05	5
1334496	2	54	43,8	sleep5	0	-21	swapper/5	07:08:05	5
1334393	2	53	41,8	sleep4	0	-21	swapper/4	07:06:35	4
1334393	2	53	41,8	sleep4	0	-21	swapper/4	07:06:35	4
1334366	2	53	19,30	sleep7	0	-21	swapper/7	07:06:14	7
1334366	2	53	19,30	sleep7	0	-21	swapper/7	07:06:14	7
1334864	99	40	38,2	cyclictest	1795093	-21	kworker/u16:0+events_unbound	11:14:28	5
1334864	99	39	35,3	cyclictest	1261595	-21	kworker/u16:2+events_unbound	07:09:33	5
1334260	2	39	28,7	sleep6	0	-21	swapper/6	07:04:53	6
1334260	2	39	28,7	sleep6	0	-21	swapper/6	07:04:53	6
1334869	99	37	0,35	cyclictest	1542308	-21	latency_hist	08:54:15	7
1334864	99	37	35,2	cyclictest	1620336	-21	kworker/u16:2+events_unbound	09:59:09	5
1334864	99	36	34,2	cyclictest	1368159	-21	kworker/u16:3+flush-8:0	08:09:30	5
1334860	99	35	32,2	cyclictest	1795093	-21	kworker/u16:0+events_unbound	11:09:17	4
1334860	99	33	31,2	cyclictest	1911046	-21	kworker/u16:3+events_unbound	12:37:25	4
1334860	99	33	31,2	cyclictest	1561961	-21	kworker/u16:0+events_unbound	09:07:34	4
1334860	99	33	31,2	cyclictest	1561961	-21	kworker/u16:0+events_unbound	09:07:34	4
1334869	99	32	0,1	cyclictest	0	-21	swapper/7	09:24:42	7
1334860	99	32	30,2	cyclictest	1436030	-21	kworker/u16:1+events_unbound	08:48:34	4
1334869	99	31	26,4	cyclictest	1522970	-21	latency_hist	08:44:16	7
1334860	99	31	29,2	cyclictest	1368159	-21	kworker/u16:3+events_unbound	08:27:34	4
1334869	99	30	24,5	cyclictest	1474458	-21	latency_hist	08:19:15	7
1334860	99	30	27,2	cyclictest	1561961	-21	kworker/u16:0+events_unbound	10:29:25	4
1334860	99	29	27,2	cyclictest	1765969	-21	kworker/u16:0+events_unbound	10:53:33	4
1334860	99	29	27,2	cyclictest	1756083	-21	kworker/u16:4+events_unbound	10:46:25	4
1334860	99	29	27,2	cyclictest	1746077	-21	kworker/u16:1+events_unbound	11:41:32	4
1334860	99	29	27,2	cyclictest	1697825	-21	kworker/u16:3+flush-8:0	10:15:17	4
1334860	99	29	27,2	cyclictest	1436030	-21	kworker/u16:1+events_unbound	08:42:33	4
1334860	99	28	26,2	cyclictest	1631413	-21	kworker/u16:1+events_unbound	09:45:34	4
1334860	99	28	26,2	cyclictest	1571816	-21	kworker/u16:2+flush-8:0	09:10:05	4
1334864	99	27	25,2	cyclictest	1911046	-21	kworker/u16:3+flush-8:0	12:34:30	5
1334860	99	27	25,2	cyclictest	1795093	-21	kworker/u16:0+events_unbound	11:53:17	4
1334869	99	26	0,24	cyclictest	1852867	-21	latency_hist	11:34:15	7
1334860	99	26	24,2	cyclictest	1911046	-21	kworker/u16:3+events_unbound	12:08:32	4
1334860	99	26	24,2	cyclictest	1795093	-21	kworker/u16:0+flush-8:0	11:25:25	4
1334860	99	26	24,2	cyclictest	1795093	-21	kworker/u16:0+flush-8:0	11:25:25	4
1334860	99	26	24,2	cyclictest	1436030	-21	kworker/u16:1+events_unbound	08:31:13	4
1334865	99	25	22,2	cyclictest	1261595	-21	kworker/u16:2+flush-8:0	07:14:41	6
1334864	99	25	23,2	cyclictest	1795093	-21	kworker/u16:0+flush-8:0	11:44:30	5
1334864	99	25	23,2	cyclictest	1368159	-21	kworker/u16:3+flush-8:0	07:49:36	5
1334860	99	25	23,2	cyclictest	1795093	-21	kworker/u16:0+flush-8:0	11:34:57	4
1334860	99	25	23,2	cyclictest	1620336	-21	kworker/u16:2+events_unbound	09:54:06	4
1334860	99	25	23,2	cyclictest	1561961	-21	kworker/u16:0+flush-8:0	10:38:30	4
1334860	99	25	23,2	cyclictest	1541387	-21	kworker/u16:2+events_unbound	08:58:25	4
1334860	99	25	23,2	cyclictest	1387187	-21	kworker/u16:4+events_unbound	07:51:34	4
1334860	99	25	22,2	cyclictest	1261595	-21	kworker/u16:2+flush-8:0	07:54:33	4
1334864	99	24	21,2	cyclictest	1795093	-21	kworker/u16:0+events_unbound	11:04:32	5
1334860	99	24	22,2	cyclictest	1911046	-21	kworker/u16:3+events_unbound	12:27:17	4
1334860	99	24	22,2	cyclictest	1368159	-21	kworker/u16:3+events_unbound	08:17:34	4
1334860	99	24	22,2	cyclictest	1261595	-21	kworker/u16:2+events_unbound	07:15:33	4
1334864	99	23	21,2	cyclictest	1436030	-21	kworker/u16:1+events_unbound	07:59:29	5
1334860	99	23	21,2	cyclictest	1600962	-21	kworker/u16:1+flush-8:0	09:30:34	4
1334869	99	22	17,4	cyclictest	1755878	-21	latency_hist	10:44:15	7
1334869	99	22	17,4	cyclictest	1755878	-21	latency_hist	10:44:15	7
1334864	99	22	19,2	cyclictest	1649404	-21	kworker/u16:4+flush-8:0	09:49:41	5
1334860	99	22	20,2	cyclictest	1872274	-21	kworker/u16:2+events_unbound	11:57:16	4
1334860	99	22	20,2	cyclictest	1561961	-21	kworker/u16:0+events_unbound	10:22:01	4
1334860	99	22	20,2	cyclictest	1387187	-21	kworker/u16:4+flush-8:0	08:02:25	4
1334860	99	22	20,2	cyclictest	1387187	-21	kworker/u16:4+events_unbound	07:47:34	4
1334864	99	21	19,2	cyclictest	1561961	-21	kworker/u16:0+events_unbound	09:09:33	5
1334864	99	21	19,2	cyclictest	1541387	-21	kworker/u16:2+flush-8:0	08:54:29	5
1334864	99	21	19,2	cyclictest	1425993	-21	kworker/u16:0+flush-8:0	08:39:16	5
1334864	99	21	19,2	cyclictest	1368159	-21	kworker/u16:3+flush-8:0	07:24:33	5
1334860	99	21	19,2	cyclictest	1765969	-21	kworker/u16:0+events_unbound	10:56:33	4
1334860	99	21	19,2	cyclictest	1571816	-21	kworker/u16:2+events_unbound	09:21:30	4
1334860	99	21	19,2	cyclictest	1368159	-21	kworker/u16:3+events_unbound	08:13:32	4
1334860	99	21	19,2	cyclictest	1261595	-21	kworker/u16:2+events_unbound	07:30:30	4
1334860	99	21	19,2	cyclictest	1261595	-21	kworker/u16:2+events_unbound	07:30:30	4
1334864	99	20	18,2	cyclictest	1746077	-21	kworker/u16:1+events_unbound	10:49:31	5
1334860	99	20	18,2	cyclictest	1561961	-21	kworker/u16:0+flush-8:0	09:59:47	4
1334860	99	20	18,2	cyclictest	1315341	-21	kworker/u16:1+events_unbound	07:22:33	4
1334860	99	20	17,2	cyclictest	1551739	-21	kworker/u16:3+flush-8:0	09:34:26	4
1334865	99	19	15,3	cyclictest	1688379	-21	munin-node	10:09:27	6
1334864	99	19	17,2	cyclictest	1911046	-21	kworker/u16:3+flush-8:0	12:24:28	5
1334864	99	19	17,2	cyclictest	1746077	-21	kworker/u16:1+flush-8:0	11:54:36	5
1334864	99	19	17,2	cyclictest	1668475	-21	kworker/u16:1+flush-8:0	09:59:22	5
1334864	99	19	17,2	cyclictest	1387187	-21	kworker/u16:4+events_unbound	07:44:30	5
1334864	99	19	17,2	cyclictest	1315341	-21	kworker/u16:1+events_unbound	07:24:01	5
1334864	99	19	17,2	cyclictest	1261595	-21	kworker/u16:2+events_unbound	07:54:44	5
1334860	99	19	17,2	cyclictest	1795093	-21	kworker/u16:0+events_unbound	11:14:45	4
1334860	99	19	17,2	cyclictest	1600962	-21	kworker/u16:1+flush-8:0	09:29:12	4
1334860	99	19	17,2	cyclictest	1561961	-21	kworker/u16:0+flush-8:0	10:43:57	4
1334860	99	19	17,2	cyclictest	1561961	-21	kworker/u16:0+flush-8:0	10:43:57	4
1334860	99	19	17,2	cyclictest	1436030	-21	kworker/u16:1+events_unbound	08:59:53	4
1334864	99	18	16,2	cyclictest	1425993	-21	kworker/u16:0+flush-8:0	08:49:37	5
1334864	99	18	16,2	cyclictest	1368159	-21	kworker/u16:3+flush-8:0	07:29:29	5
1334864	99	18	16,2	cyclictest	1368159	-21	kworker/u16:3+flush-8:0	07:29:29	5
1334864	99	18	15,2	cyclictest	1561961	-21	kworker/u16:0+events_unbound	10:04:18	5
1334860	99	18	16,2	cyclictest	1911046	-21	kworker/u16:3+flush-8:0	12:14:49	4
1334860	99	18	16,2	cyclictest	1911046	-21	kworker/u16:3+flush-8:0	12:14:49	4
1334860	99	18	16,2	cyclictest	1795093	-21	kworker/u16:0+flush-8:0	11:47:37	4
1334860	99	18	16,2	cyclictest	1795093	-21	kworker/u16:0+events_unbound	11:04:45	4
1334860	99	18	16,2	cyclictest	1551739	-21	kworker/u16:3+flush-8:0	09:39:52	4
1334860	99	18	16,2	cyclictest	1541387	-21	kworker/u16:2+events_unbound	08:53:41	4
1334860	99	18	16,2	cyclictest	1261595	-21	kworker/u16:2+events_unbound	07:37:30	4
1334860	99	18	15,2	cyclictest	1872274	-21	kworker/u16:2+events_unbound	11:59:15	4
1334869	99	17	16,0	cyclictest	0	-21	swapper/7	09:09:36	7
1334869	99	17	15,1	cyclictest	0	-21	swapper/7	09:59:13	7
1334869	99	17	0,15	cyclictest	650	-21	systemd-journal	11:54:15	7
1334864	99	17	15,2	cyclictest	1872274	-21	kworker/u16:2+flush-8:0	12:19:31	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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