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 Sat Jun 20, 2026 12:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1741529	2	101	0,1	sleep7	1741530	-21	sh	12:34:25	7
996280	2	59	48,8	sleep4	0	-21	swapper/4	07:09:37	4
996206	2	48	23,8	sleep5	0	-21	swapper/5	07:08:33	5
987869	2	41	5,30	sleep7	0	-21	swapper/7	07:05:07	7
996076	2	38	27,8	sleep6	0	-21	swapper/6	07:06:42	6
996580	99	34	32,1	cyclictest	0	-21	swapper/7	10:59:47	7
1696734	2	33	0,1	chrt	0	-21	swapper/4	12:15:06	4
1561968	2	33	0,0	chrt	0	-21	swapper/4	11:20:09	4
996580	99	31	29,1	cyclictest	1367405	-21	strings	10:00:12	7
996577	99	30	28,2	cyclictest	1466819	-21	kworker/u16:0+flush-8:0	11:49:42	6
996580	99	29	27,1	cyclictest	0	-21	swapper/7	11:16:54	7
1140776	2	29	0,1	sleep7	0	-21	swapper/7	08:20:05	7
1140776	2	29	0,1	sleep7	0	-21	swapper/7	08:20:05	7
1371841	2	28	0,0	chrt	1371843	-21	fschecks_count	10:05:02	7
996571	99	27	25,2	cyclictest	1423746	-21	kworker/u16:2+events_unbound	10:35:56	4
1678996	2	27	0,1	chrt	1678995	-21	ssh	12:07:56	7
996580	99	25	24,0	cyclictest	0	-21	swapper/7	12:36:52	7
996580	99	25	24,0	cyclictest	0	-21	swapper/7	10:38:20	7
996580	99	25	19,5	cyclictest	650	-21	systemd-journal	11:14:42	7
996577	99	25	23,2	cyclictest	958828	-21	kworker/u16:2+flush-8:0	07:39:43	6
996577	99	25	23,2	cyclictest	1466819	-21	kworker/u16:0+events_unbound	11:50:43	6
996577	99	25	23,2	cyclictest	1010446	-21	kworker/u16:4+flush-8:0	07:40:05	6
996571	99	25	23,2	cyclictest	1676895	-21	kworker/u16:1+flush-8:0	12:20:54	4
996571	99	25	23,2	cyclictest	1150673	-21	kworker/u16:1+flush-8:0	08:29:45	4
996580	99	24	23,0	cyclictest	0	-21	swapper/7	11:29:32	7
996580	99	24	23,0	cyclictest	0	-21	swapper/7	10:31:06	7
996580	99	24	22,1	cyclictest	0	-21	swapper/7	07:50:02	7
996577	99	24	22,2	cyclictest	1215091	-21	kworker/u16:3+flush-8:0	10:04:42	6
996577	99	24	22,2	cyclictest	1010446	-21	kworker/u16:4+events_unbound	07:15:03	6
996577	99	24	1,16	cyclictest	0	-21	swapper/6	09:40:04	6
996571	99	24	22,2	cyclictest	1676895	-21	kworker/u16:1+flush-8:0	12:09:54	4
996580	99	23	21,1	cyclictest	1690267	-21	ssh	12:11:00	7
996580	99	23	21,1	cyclictest	1417948	-21	ssh	10:20:49	7
996580	99	23	21,1	cyclictest	1417948	-21	ssh	10:20:49	7
996577	99	23	21,2	cyclictest	1095417	-21	kworker/u16:1+events_unbound	08:15:01	6
996577	99	23	21,2	cyclictest	1095417	-21	kworker/u16:1+events_unbound	08:15:01	6
996577	99	23	21,2	cyclictest	1088429	-21	kworker/u16:0+flush-8:0	09:00:16	6
996577	99	23	19,3	cyclictest	1234145	-21	latency_hist	09:09:48	6
996571	99	23	21,2	cyclictest	958828	-21	kworker/u16:2+events_unbound	07:49:25	4
996571	99	23	21,2	cyclictest	1615113	-21	kworker/u16:2+events_unbound	12:04:53	4
996571	99	23	21,2	cyclictest	1498390	-21	kworker/u16:2+events_unbound	11:03:11	4
996571	99	23	21,2	cyclictest	1466819	-21	kworker/u16:0+events_unbound	11:08:59	4
996571	99	23	21,2	cyclictest	1392027	-21	kworker/u16:1+events_unbound	10:55:44	4
996571	99	23	21,2	cyclictest	1358514	-21	kworker/u16:0+events_unbound	10:19:29	4
996571	99	23	21,2	cyclictest	1215091	-21	kworker/u16:3+events_unbound	10:04:28	4
996571	99	23	21,2	cyclictest	1166345	-21	kworker/u16:1+events_unbound	09:07:45	4
996580	99	22	21,0	cyclictest	0	-21	swapper/7	10:40:49	7
996580	99	22	21,0	cyclictest	0	-21	swapper/7	09:20:34	7
996580	99	22	20,1	cyclictest	1629308	-21	ssh	11:47:27	7
996580	99	22	20,1	cyclictest	0	-21	swapper/7	10:29:47	7
996580	99	22	20,1	cyclictest	0	-21	swapper/7	10:29:47	7
996580	99	22	20,1	cyclictest	0	-21	swapper/7	09:54:45	7
996577	99	22	20,2	cyclictest	1554648	-21	kworker/u16:5+flush-8:0	11:22:20	6
996571	99	22	20,2	cyclictest	996786	-21	kworker/u16:0+events_unbound	07:12:25	4
996571	99	22	20,2	cyclictest	1392027	-21	kworker/u16:1+events_unbound	10:23:49	4
996571	99	22	20,2	cyclictest	1392027	-21	kworker/u16:1+events_unbound	10:23:49	4
996571	99	22	20,2	cyclictest	1333691	-21	kworker/u16:5+events_unbound	10:06:52	4
996571	99	22	20,2	cyclictest	1215091	-21	kworker/u16:3+events_unbound	10:26:13	4
996571	99	22	20,2	cyclictest	1215091	-21	kworker/u16:3+events_unbound	10:26:13	4
996580	99	21	20,0	cyclictest	0	-21	swapper/7	07:39:53	7
996577	99	21	19,2	cyclictest	1532934	-21	kworker/u16:1+flush-8:0	11:30:24	6
996577	99	21	19,2	cyclictest	1137060	-21	kworker/u16:4+flush-8:0	08:24:48	6
996575	99	21	18,2	cyclictest	1466819	-21	kworker/u16:0+flush-8:0	11:05:04	5
996571	99	21	19,2	cyclictest	1466819	-21	kworker/u16:0+events_unbound	11:29:58	4
996571	99	21	19,2	cyclictest	1215091	-21	kworker/u16:3+flush-8:0	09:45:00	4
996571	99	21	19,2	cyclictest	1127346	-21	kworker/u16:3+events_unbound	08:15:11	4
996571	99	21	19,2	cyclictest	1127346	-21	kworker/u16:3+events_unbound	08:15:11	4
996571	99	21	19,2	cyclictest	1088429	-21	kworker/u16:0+events_unbound	09:02:56	4
996580	99	20	19,0	cyclictest	0	-21	swapper/7	09:30:25	7
996580	99	20	19,0	cyclictest	0	-21	swapper/7	09:19:35	7
996580	99	20	18,1	cyclictest	1480842	-21	ssh	10:47:33	7
996577	99	20	18,2	cyclictest	1466819	-21	kworker/u16:0+events_unbound	11:05:26	6
996577	99	20	18,2	cyclictest	1321568	-21	kworker/u16:2+events_unbound	09:50:02	6
996577	99	20	18,2	cyclictest	1156544	-21	kworker/u16:2+events_unbound	09:24:45	6
996575	99	20	18,2	cyclictest	1532934	-21	kworker/u16:1+flush-8:0	11:22:09	5
996575	99	20	18,2	cyclictest	1156544	-21	kworker/u16:2+events_unbound	09:16:45	5
996571	99	20	18,2	cyclictest	1676895	-21	kworker/u16:1+events_unbound	12:39:05	4
996571	99	20	18,2	cyclictest	1554648	-21	kworker/u16:5+events_unbound	11:52:09	4
996571	99	20	18,2	cyclictest	1358514	-21	kworker/u16:0+events_unbound	10:31:10	4
996571	99	20	18,2	cyclictest	1088429	-21	kworker/u16:0+events_unbound	08:50:49	4
996571	99	20	18,2	cyclictest	1038421	-21	kworker/u16:0+events_unbound	07:29:16	4
996571	99	20	18,2	cyclictest	1010446	-21	kworker/u16:4+events_unbound	07:43:53	4
996580	99	19	18,0	cyclictest	0	-21	swapper/7	09:10:01	7
996580	99	19	18,0	cyclictest	0	-21	swapper/7	08:02:45	7
996580	99	19	17,1	cyclictest	0	-21	swapper/7	11:59:57	7
996577	99	19	17,2	cyclictest	1615113	-21	kworker/u16:2+events_unbound	11:55:16	6
996577	99	19	17,2	cyclictest	1423746	-21	kworker/u16:2+flush-8:0	10:37:28	6
996577	99	19	17,2	cyclictest	1215091	-21	kworker/u16:3+events_unbound	09:45:11	6
996577	99	19	17,2	cyclictest	1088429	-21	kworker/u16:0+flush-8:0	08:20:11	6
996577	99	19	17,2	cyclictest	1088429	-21	kworker/u16:0+flush-8:0	08:20:11	6
996577	99	19	17,2	cyclictest	1038421	-21	kworker/u16:0+flush-8:0	07:30:01	6
996577	99	19	14,4	cyclictest	1729430	-21	awk	12:29:47	6
996577	99	19	14,4	cyclictest	1729430	-21	awk	12:29:47	6
996571	99	19	17,2	cyclictest	958828	-21	kworker/u16:2+events_unbound	07:39:29	4
996571	99	19	17,2	cyclictest	942866	-21	kworker/u16:1+flush-8:0	07:16:53	4
996571	99	19	17,2	cyclictest	1466819	-21	kworker/u16:0+flush-8:0	11:45:45	4
996571	99	19	17,2	cyclictest	1466819	-21	kworker/u16:0+events_unbound	12:29:11	4
996571	99	19	17,2	cyclictest	1466819	-21	kworker/u16:0+events_unbound	12:29:11	4
996571	99	19	17,2	cyclictest	1049456	-21	kworker/u16:3+events_unbound	08:01:07	4
996580	99	18	16,1	cyclictest	0	-21	swapper/7	09:59:11	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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