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 Thu Dec 25, 2025 06:45:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
499929	99	95	83,10	cyclictest	506758	-21	kworker/u4:3+events_unbound	05:45:01	1
499928	99	91	84,5	cyclictest	481500	-21	kworker/u4:7+events_unbound	05:24:54	0
499928	99	91	83,6	cyclictest	506758	-21	kworker/u4:3+events_unbound	05:40:00	0
499929	99	69	50,8	cyclictest	506758	-21	kworker/u4:3+events_unbound	05:55:02	1
499929	99	67	58,7	cyclictest	631803	-21	kworker/u4:4+events_unbound	06:15:00	1
499928	99	65	52,6	cyclictest	631805	-21	kworker/u4:6+events_unbound	06:20:07	0
499929	99	63	56,5	cyclictest	498623	-21	kworker/u4:0+events_unbound	05:25:01	1
499928	99	60	5,15	cyclictest	499927	-21	modprobe	05:05:01	0
499928	99	60	5,15	cyclictest	499927	-21	modprobe	05:05:00	0
499928	99	60	40,17	cyclictest	654288	-21	wc	05:41:27	0
499928	99	56	49,5	cyclictest	502420	-21	kworker/u4:16+events_unbound	05:35:00	0
499928	99	56	48,5	cyclictest	869541	-21	kworker/u4:8+events_unbound	06:34:59	0
499928	99	56	35,18	cyclictest	843793	-21	od	06:05:27	0
499929	99	55	47,6	cyclictest	847193	-21	multi.sh	06:05:55	1
499929	99	55	46,7	cyclictest	657763	-21	if_eth0	05:55:21	1
499928	99	55	45,8	cyclictest	506827	-21	systemd	05:29:57	0
499928	99	55	33,20	cyclictest	657547	-21	fschecks_count	05:55:19	0
499929	99	54	46,5	cyclictest	868578	-21	aten_r7power_po	06:30:16	1
499928	99	54	38,11	cyclictest	830303	-21	multi.sh	06:03:32	0
499929	99	52	42,7	cyclictest	0	-21	swapper/1	06:35:34	1
499929	99	52	41,9	cyclictest	616778	-21	sh	05:35:32	1
499929	99	52	32,7	cyclictest	658411	-21	kworker/u4:5+events_unbound	06:27:51	1
499928	99	52	44,6	cyclictest	658411	-21	kworker/u4:5+events_unbound	06:25:08	0
499929	99	51	38,7	cyclictest	506758	-21	kworker/u4:3+events_unbound	05:33:00	1
499928	99	51	41,7	cyclictest	506758	-21	kworker/u4:3+events_unbound	05:54:43	0
499928	99	51	30,17	cyclictest	0	-21	swapper/0	05:15:02	0
499929	99	50	43,5	cyclictest	828416	-21	od	06:03:19	1
499929	99	49	41,5	cyclictest	866125	-21	fschecks_count	06:20:17	1
499929	99	49	21,19	cyclictest	0	-21	swapper/1	05:27:38	1
499928	99	49	26,20	cyclictest	0	-21	swapper/0	06:35:21	0
499929	99	48	39,7	cyclictest	506758	-21	kworker/u4:3+events_unbound	06:20:01	1
499929	99	47	39,6	cyclictest	500129	-21	wget	05:05:15	1
499929	99	46	37,7	cyclictest	504074	-21	latency_hist	05:20:02	1
499928	99	46	39,4	cyclictest	0	-21	swapper/0	05:50:02	0
499928	99	44	32,9	cyclictest	864798	-21	fschecks_count	06:15:19	0
499929	99	43	37,4	cyclictest	502428	-21	systemd	05:14:50	1
499929	99	43	35,5	cyclictest	631803	-21	kworker/u4:4-rpciod	05:47:39	1
499928	99	43	36,4	cyclictest	502814	-21	aten_r7power_vo	05:15:17	0
499928	99	43	35,5	cyclictest	501206	-21	latency_hist	05:10:00	0
499929	99	42	35,5	cyclictest	499960	-21	latency_hist	05:05:01	1
499929	99	42	35,5	cyclictest	499960	-21	latency_hist	05:05:01	1
499928	99	38	30,5	cyclictest	863528	-21	fschecks_count	06:10:20	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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