OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #7, slot #2

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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the highest latencies:

System rack7slot2.osadl.org (updated Wed Aug 05, 2026 06:45:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
717988	99	106	99,5	cyclictest	717479	-21	kworker/u4:0+events_unbound	05:12:39	0
717988	99	95	88,5	cyclictest	718123	-21	kworker/u4:3+events_unbound	05:27:42	0
717988	99	89	81,5	cyclictest	716720	-21	kworker/u4:4+events_unbound	05:47:47	0
717988	99	87	79,6	cyclictest	1028686	-21	kworker/u4:4+events_unbound	06:12:51	0
717988	99	81	74,5	cyclictest	940704	-21	kworker/u4:10+events_unbound	06:17:49	0
717989	99	74	61,5	cyclictest	1031245	-21	kworker/u4:0+events_unbound	06:22:50	1
717989	99	71	64,5	cyclictest	718123	-21	kworker/u4:3+events_unbound	05:52:47	1
717989	99	71	63,6	cyclictest	834890	-21	kworker/u4:7+events_unbound	06:32:51	1
717989	99	70	63,5	cyclictest	852196	-21	kworker/u4:5+events_unbound	05:57:47	1
717989	99	69	62,5	cyclictest	717922	-21	kworker/u4:8+events_unbound	05:22:40	1
717988	99	66	57,6	cyclictest	722196	-21	kworker/u4:5+events_unbound	05:32:43	0
717989	99	65	58,5	cyclictest	940704	-21	kworker/u4:10+events_unbound	06:10:01	1
717989	99	63	56,5	cyclictest	1028686	-21	kworker/u4:4+events_unbound	06:37:54	1
717989	99	61	53,6	cyclictest	716720	-21	kworker/u4:4+events_unbound	05:10:04	1
717988	99	57	45,9	cyclictest	1015680	-21	sh	06:02:51	0
717989	99	56	49,5	cyclictest	718392	-21	kworker/u4:1+events_unbound	05:40:03	1
717988	99	56	51,3	cyclictest	718123	-21	kworker/u4:3+events_unbound	06:08:55	0
717988	99	56	34,19	cyclictest	1031255	-21	cron	06:24:59	0
717988	99	55	42,6	cyclictest	718123	-21	kworker/u4:3+events_unbound	05:50:20	0
717988	99	52	44,6	cyclictest	847710	-21	multi.sh	05:39:39	0
717988	99	52	44,6	cyclictest	834890	-21	kworker/u4:7+events_unbound	06:25:05	0
717988	99	51	42,7	cyclictest	1031635	-21	systemd	06:32:50	0
717988	99	50	41,6	cyclictest	959787	-21	spawn	05:59:32	0
717989	99	49	32,12	cyclictest	746787	-21	spawn	05:31:46	1
717989	99	48	41,5	cyclictest	718124	-21	kworker/u4:5+events_unbound	05:07:44	1
717989	99	48	40,6	cyclictest	1016997	-21	sh	06:03:17	1
717989	99	48	38,8	cyclictest	849663	-21	multi.sh	05:40:39	1
717989	99	47	39,6	cyclictest	1031455	-21	systemd	06:27:51	1
717988	99	47	39,6	cyclictest	717922	-21	kworker/u4:8+events_unbound	05:17:01	0
717989	99	46	38,6	cyclictest	851837	-21	latency_hist	05:50:06	1
717988	99	45	11,22	cyclictest	19	1	rcuc/0	05:41:03	0
717988	99	44	8,25	cyclictest	717986	-21	cyclictest	05:05:00	0
717988	99	44	36,6	cyclictest	717766	-21	kworker/u4:1+events_unbound	05:05:34	0
717988	99	41	25,14	cyclictest	1031824	-21	cron	06:40:00	0
717989	99	40	27,7	cyclictest	717922	-21	kworker/u4:8+events_unbound	05:16:28	1
717989	99	39	30,6	cyclictest	719311	-21	fstime	05:27:40	1
717988	99	39	33,4	cyclictest	0	-21	swapper/0	05:25:00	0
717989	99	38	29,6	cyclictest	0	-21	swapper/1	06:15:01	1
717989	99	37	30,5	cyclictest	940704	-21	kworker/u4:10+events_unbound	06:15:04	1
717989	99	37	29,6	cyclictest	718047	-21	latency_hist	05:05:01	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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