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 50 highest latencies:

System rack0slot2.osadl.org (updated Thu Mar 12, 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
124886	2	104	0,1	sleep7	0	-21	swapper/7	20:59:20	7
495536	2	100	0,1	sleep7	495528	-21	ntp_offset	23:34:28	7
4089375	2	58	48,7	sleep5	0	-21	swapper/5	19:03:25	5
4089702	99	52	49,2	cyclictest	508128	-21	kworker/u16:0+events_unbound	00:04:15	5
4089343	2	51	41,7	sleep4	0	-21	swapper/4	19:03:00	4
4089702	99	49	46,2	cyclictest	344027	-21	kworker/u16:4+events_unbound	23:39:16	5
4089704	99	46	42,3	cyclictest	211757	-21	kworker/u16:3+flush-8:0	21:39:01	6
4089702	99	46	43,2	cyclictest	534533	-21	kworker/u16:1+events_unbound	23:54:13	5
4089702	99	45	43,2	cyclictest	343704	-21	kworker/u16:2+flush-8:0	22:49:00	5
4089702	99	44	42,2	cyclictest	486970	-21	kworker/u16:3+events_unbound	00:14:27	5
4089702	99	43	41,2	cyclictest	508128	-21	kworker/u16:0+events_unbound	00:19:28	5
4089702	99	43	40,2	cyclictest	508128	-21	kworker/u16:0+events_unbound	23:49:26	5
4089702	99	43	40,2	cyclictest	508128	-21	kworker/u16:0+events_unbound	23:49:26	5
4089702	99	42	40,2	cyclictest	401447	-21	kworker/u16:1+events_unbound	23:25:43	5
4089702	99	42	40,2	cyclictest	344027	-21	kworker/u16:4+events_unbound	22:59:32	5
4089702	99	42	39,2	cyclictest	534533	-21	kworker/u16:1+flush-8:0	00:29:10	5
4089702	99	42	39,2	cyclictest	534533	-21	kworker/u16:1+flush-8:0	00:29:10	5
4089702	99	41	39,2	cyclictest	508128	-21	kworker/u16:0+events_unbound	00:10:38	5
4089702	99	41	39,2	cyclictest	344027	-21	kworker/u16:4+events_unbound	23:19:32	5
4089702	99	41	39,2	cyclictest	344027	-21	kworker/u16:4+events_unbound	23:04:14	5
4089702	99	41	39,2	cyclictest	344027	-21	kworker/u16:4+events_unbound	22:52:38	5
4089702	99	41	38,2	cyclictest	61351	-21	kworker/u16:2+events_unbound	21:14:02	5
4089280	2	41	31,7	sleep6	0	-21	swapper/6	19:02:06	6
4089236	2	40	5,31	sleep7	0	-21	swapper/7	19:01:26	7
4089702	99	39	37,2	cyclictest	401447	-21	kworker/u16:1+events_unbound	22:58:18	5
4089702	99	39	37,2	cyclictest	272052	-21	kworker/u16:0+events_unbound	22:22:18	5
4089702	99	39	37,2	cyclictest	131092	-21	kworker/u16:0+events_unbound	21:28:30	5
4089702	99	39	37,2	cyclictest	131092	-21	kworker/u16:0+events_unbound	21:07:47	5
4089702	99	39	36,2	cyclictest	438503	-21	kworker/u16:2+events_unbound	23:29:09	5
4089704	99	38	35,2	cyclictest	24279	-21	kworker/u16:4+flush-8:0	20:29:26	6
4089702	99	38	36,2	cyclictest	91202	-21	kworker/u16:1+events_unbound	21:43:02	5
4089702	99	38	36,2	cyclictest	61351	-21	kworker/u16:2+events_unbound	21:34:43	5
4089702	99	38	36,2	cyclictest	606001	-21	kworker/u16:4+events_unbound	00:25:10	5
4089702	99	38	36,2	cyclictest	486970	-21	kworker/u16:3+events_unbound	00:01:57	5
4089702	99	38	36,2	cyclictest	438503	-21	kworker/u16:2+events_unbound	23:38:26	5
4089702	99	38	36,2	cyclictest	4169835	-21	kworker/u16:3+flush-8:0	19:54:34	5
4089702	99	38	36,2	cyclictest	401447	-21	kworker/u16:1+flush-8:0	23:09:46	5
4089702	99	38	36,2	cyclictest	401447	-21	kworker/u16:1+flush-8:0	23:09:46	5
4089702	99	38	36,2	cyclictest	401447	-21	kworker/u16:1+events_unbound	23:17:33	5
4089702	99	38	36,2	cyclictest	344027	-21	kworker/u16:4+flush-8:0	23:44:57	5
4089702	99	38	36,2	cyclictest	272052	-21	kworker/u16:0+events_unbound	22:17:14	5
4089702	99	38	36,2	cyclictest	258382	-21	kworker/u16:5+events_unbound	21:57:02	5
4089698	99	38	32,5	cyclictest	258382	-21	kworker/u16:5+flush-8:0	22:19:00	4
4089708	99	37	32,4	cyclictest	4141191	-21	latency_hist	19:29:00	7
4089704	99	37	35,2	cyclictest	91202	-21	kworker/u16:1+events_unbound	21:24:22	6
4089704	99	37	34,2	cyclictest	508128	-21	kworker/u16:0+flush-8:0	00:04:28	6
4089702	99	37	35,2	cyclictest	294078	-21	kworker/u16:1+events_unbound	22:11:47	5
4089702	99	37	35,2	cyclictest	258382	-21	kworker/u16:5+events_unbound	22:30:37	5
4089702	99	37	35,2	cyclictest	258382	-21	kworker/u16:5+events_unbound	22:30:37	5
4089702	99	37	35,2	cyclictest	247619	-21	kworker/u16:3+events_unbound	22:05:42	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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