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 Jul 21, 2026 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
822459	2	55	21,29	sleep7	0	-21	swapper/7	19:07:56	7
822570	2	52	42,7	sleep4	0	-21	swapper/4	19:09:30	4
822848	99	44	40,3	cyclictest	648	-21	systemd-journal	00:09:26	7
822399	2	40	30,7	sleep5	0	-21	swapper/5	19:07:06	5
822844	99	38	36,2	cyclictest	1571599	-21	kworker/u16:3+events_unbound	00:37:05	6
822844	99	38	36,2	cyclictest	1571599	-21	kworker/u16:3+events_unbound	00:37:05	6
822844	99	38	36,2	cyclictest	1302206	-21	kworker/u16:0+events_unbound	23:08:57	6
822844	99	38	35,2	cyclictest	1350195	-21	kworker/u16:1+flush-8:0	23:39:46	6
822844	99	37	36,1	cyclictest	1157921	-21	kworker/u16:2+events_unbound	22:17:33	6
822844	99	37	35,2	cyclictest	1264864	-21	kworker/u16:1+events_unbound	22:36:50	6
822844	99	37	35,2	cyclictest	1264864	-21	kworker/u16:1+events_unbound	22:36:50	6
822844	99	36	34,2	cyclictest	1445330	-21	kworker/u16:0+events_unbound	23:52:57	6
822844	99	36	34,2	cyclictest	1427192	-21	kworker/u16:2+events_unbound	00:05:49	6
822844	99	36	34,2	cyclictest	1302206	-21	kworker/u16:0+events_unbound	22:58:10	6
822844	99	36	34,2	cyclictest	1206796	-21	kworker/u16:1+events_unbound	22:20:29	6
822844	99	36	34,2	cyclictest	1157921	-21	kworker/u16:2+events_unbound	22:45:22	6
822844	99	36	34,2	cyclictest	1108970	-21	kworker/u16:3+events_unbound	21:45:02	6
822844	99	36	34,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:58:47	6
822844	99	36	34,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:39:46	6
822844	99	35	33,2	cyclictest	1472918	-21	kworker/u16:4+flush-8:0	00:01:06	6
822844	99	35	33,2	cyclictest	1377636	-21	kworker/u16:4+events_unbound	23:32:02	6
822844	99	35	33,2	cyclictest	1350195	-21	kworker/u16:1+events_unbound	23:23:50	6
822844	99	35	33,2	cyclictest	1316687	-21	kworker/u16:2+events_unbound	23:02:10	6
822844	99	35	33,2	cyclictest	1206796	-21	kworker/u16:1+events_unbound	22:13:17	6
822844	99	35	33,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:32:50	6
822844	99	34	32,2	cyclictest	875109	-21	kworker/u16:3+flush-8:0	19:34:58	6
822844	99	34	32,2	cyclictest	793642	-21	kworker/u16:1+events_unbound	21:22:50	6
822844	99	34	32,2	cyclictest	793642	-21	kworker/u16:1+events_unbound	21:19:26	6
822844	99	34	32,2	cyclictest	1475736	-21	kworker/u16:5+events_unbound	00:26:51	6
822844	99	34	32,2	cyclictest	1475736	-21	kworker/u16:5+events_unbound	00:22:49	6
822844	99	34	32,2	cyclictest	1472390	-21	kworker/u16:3+events_unbound	23:57:50	6
822844	99	34	32,2	cyclictest	1243759	-21	kworker/u16:3+events_unbound	22:28:35	6
822844	99	34	32,2	cyclictest	1054864	-21	kworker/u16:4+flush-8:0	21:11:38	6
822844	99	34	32,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:38:35	6
822844	99	33	31,2	cyclictest	1475736	-21	kworker/u16:5+events_unbound	00:19:10	6
822844	99	33	31,2	cyclictest	1350195	-21	kworker/u16:1+events_unbound	23:34:54	6
822844	99	33	31,2	cyclictest	1243759	-21	kworker/u16:3+events_unbound	23:29:06	6
822844	99	33	29,3	cyclictest	865459	-21	cat	19:29:32	6
822844	99	32	30,2	cyclictest	804156	-21	kworker/u16:0+events_unbound	19:19:50	6
822844	99	32	30,2	cyclictest	698348	-21	kworker/u16:2+flush-8:0	20:09:48	6
822844	99	32	30,2	cyclictest	1475736	-21	kworker/u16:5+events_unbound	00:30:22	6
822844	99	32	30,2	cyclictest	1427192	-21	kworker/u16:2+events_unbound	23:46:59	6
822844	99	32	30,2	cyclictest	1350195	-21	kworker/u16:1+flush-8:0	23:09:42	6
822844	99	32	30,2	cyclictest	1194578	-21	kworker/u16:0+events_unbound	22:30:25	6
822844	99	32	30,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	22:09:05	6
822844	99	32	30,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:24:35	6
822838	99	32	30,2	cyclictest	793642	-21	kworker/u16:1+events_unbound	21:13:13	4
822838	99	32	30,2	cyclictest	1316687	-21	kworker/u16:2+events_unbound	23:04:21	4
822844	99	31	29,2	cyclictest	1302206	-21	kworker/u16:0+events_unbound	22:53:09	6
822844	99	31	29,2	cyclictest	1157921	-21	kworker/u16:2+flush-8:0	21:59:45	6
822844	99	31	28,2	cyclictest	698348	-21	kworker/u16:2+events_unbound	19:49:46	6
822838	99	31	29,2	cyclictest	951932	-21	kworker/u16:6+events_unbound	20:21:47	4
822838	99	31	29,2	cyclictest	951932	-21	kworker/u16:6+events_unbound	20:21:47	4
822503	2	30	20,7	sleep6	0	-21	swapper/6	19:08:36	6
822844	99	29	27,2	cyclictest	1427192	-21	kworker/u16:2+events_unbound	00:10:46	6
822844	99	29	27,2	cyclictest	1243759	-21	kworker/u16:3+flush-8:0	23:15:42	6
822844	99	29	27,2	cyclictest	1108970	-21	kworker/u16:3+flush-8:0	21:51:13	6
822838	99	29	27,2	cyclictest	1108970	-21	kworker/u16:3+events_unbound	22:07:21	4
822844	99	28	25,2	cyclictest	793642	-21	kworker/u16:1+flush-8:0	20:24:42	6
822844	99	28	25,2	cyclictest	793642	-21	kworker/u16:1+flush-8:0	20:24:42	6
822838	99	28	26,2	cyclictest	951932	-21	kworker/u16:6+events_unbound	20:36:54	4
822838	99	28	26,2	cyclictest	1243759	-21	kworker/u16:3+events_unbound	23:16:14	4
822838	99	28	26,2	cyclictest	1206796	-21	kworker/u16:1+events_unbound	22:12:34	4
1501702	2	28	0,1	chrt	1501703	-21	kthreadcore	00:09:50	7
822844	99	27	26,1	cyclictest	983691	-21	kworker/u16:2+flush-8:0	20:54:54	6
822844	99	27	25,2	cyclictest	793642	-21	kworker/u16:1+flush-8:0	20:29:48	6
822842	99	27	22,4	cyclictest	1316657	-21	cat	22:54:32	5
822838	99	27	25,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:05:59	4
822844	99	26	24,2	cyclictest	1054864	-21	kworker/u16:4+events_unbound	21:05:42	6
822838	99	26	24,2	cyclictest	937171	-21	kworker/u16:3+events_unbound	20:10:58	4
822838	99	26	24,2	cyclictest	889169	-21	kworker/u16:4+events_unbound	19:55:48	4
822838	99	26	24,2	cyclictest	875109	-21	kworker/u16:3+events_unbound	19:36:54	4
822838	99	26	24,2	cyclictest	1377636	-21	kworker/u16:4+events_unbound	23:25:12	4
822838	99	26	24,2	cyclictest	1157921	-21	kworker/u16:2+events_unbound	21:57:33	4
822838	99	26	24,2	cyclictest	1108970	-21	kworker/u16:3+events_unbound	21:40:19	4
822838	99	26	24,2	cyclictest	1087850	-21	kworker/u16:0+events_unbound	21:22:48	4
822844	99	25	23,2	cyclictest	951932	-21	kworker/u16:6+flush-8:0	20:20:03	6
822844	99	25	23,2	cyclictest	951932	-21	kworker/u16:6+flush-8:0	20:20:03	6
822844	99	25	23,2	cyclictest	1264864	-21	kworker/u16:1+flush-8:0	22:41:14	6
822838	99	25	23,2	cyclictest	951932	-21	kworker/u16:6+events_unbound	20:48:59	4
822838	99	25	23,2	cyclictest	937171	-21	kworker/u16:3+events_unbound	20:06:35	4
822838	99	25	23,2	cyclictest	885177	-21	kworker/u16:0+flush-8:0	19:43:34	4
822838	99	25	23,2	cyclictest	793642	-21	kworker/u16:1+events_unbound	20:15:01	4
822838	99	25	23,2	cyclictest	698348	-21	kworker/u16:2+events_unbound	19:19:03	4
822838	99	25	23,2	cyclictest	1555208	-21	kworker/u16:1+events_unbound	00:39:10	4
822838	99	25	23,2	cyclictest	1555208	-21	kworker/u16:1+events_unbound	00:39:10	4
822838	99	25	23,2	cyclictest	1472918	-21	kworker/u16:4+flush-8:0	00:10:13	4
822838	99	25	23,2	cyclictest	1427192	-21	kworker/u16:2+events_unbound	00:34:03	4
822838	99	25	23,2	cyclictest	1427192	-21	kworker/u16:2+events_unbound	00:05:29	4
822838	99	25	23,2	cyclictest	1194578	-21	kworker/u16:0+events_unbound	22:18:43	4
822844	99	24	22,2	cyclictest	885177	-21	kworker/u16:0+flush-8:0	19:45:02	6
822844	99	24	22,2	cyclictest	698348	-21	kworker/u16:2+events_unbound	20:01:47	6
822844	99	24	22,2	cyclictest	1000510	-21	kworker/u16:3+flush-8:0	20:49:57	6
822838	99	24	22,2	cyclictest	983691	-21	kworker/u16:2+events_unbound	20:50:15	4
822838	99	24	22,2	cyclictest	951932	-21	kworker/u16:6+events_unbound	20:31:30	4
822838	99	24	22,2	cyclictest	793642	-21	kworker/u16:1+events_unbound	21:26:09	4
822838	99	24	22,2	cyclictest	793642	-21	kworker/u16:1+events_unbound	19:23:31	4
822838	99	24	22,2	cyclictest	698348	-21	kworker/u16:2+events_unbound	19:53:02	4
822838	99	24	22,2	cyclictest	698348	-21	kworker/u16:2+events_unbound	19:25:38	4
822838	99	24	22,2	cyclictest	698348	-21	kworker/u16:2+events_unbound	19:14:18	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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