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 100 highest latencies:

System rack7slot2.osadl.org (updated Sat Aug 01, 2026 00:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3576011	99	132	118,10	cyclictest	3715750	-21	kworker/u4:4+events_unbound	23:22:04	0
3576011	99	95	86,7	cyclictest	3667115	-21	kworker/u4:6+events_unbound	23:01:58	0
3576011	99	95	85,7	cyclictest	3676133	-21	kworker/u4:12+events_unbound	23:12:00	0
3576011	99	90	82,6	cyclictest	3649072	-21	kworker/u4:14+events_unbound	22:16:50	0
3576011	99	86	75,8	cyclictest	3597690	-21	kworker/u4:7+xprtiod	20:50:07	0
3576011	99	80	70,7	cyclictest	3688851	-21	kworker/u4:2+events_unbound	22:46:57	0
3576012	99	77	39,35	cyclictest	3778966	-21	aten_r7power_en	00:25:17	1
3576012	99	76	67,7	cyclictest	3649072	-21	kworker/u4:14+events_unbound	21:56:46	1
3576012	99	75	40,32	cyclictest	3642819	-21	cut	21:50:21	1
3576011	99	75	66,7	cyclictest	3645201	-21	kworker/u4:9+events_unbound	22:01:47	0
3576012	99	74	40,31	cyclictest	1069	-21	lldpd	22:27:30	1
3576011	99	72	64,6	cyclictest	3636178	-21	kworker/u4:10+events_unbound	22:36:55	0
3576011	99	72	64,6	cyclictest	3636178	-21	kworker/u4:10+events_unbound	22:36:55	0
3576011	99	72	62,7	cyclictest	3676129	-21	kworker/u4:4+events_unbound	22:31:54	0
3576012	99	69	35,4	cyclictest	3612590	-21	mailstats	21:15:46	1
3576012	99	69	35,4	cyclictest	3612590	-21	mailstats	21:15:45	1
3576012	99	69	33,7	cyclictest	0	-21	swapper/1	22:00:40	1
3576012	99	69	32,6	cyclictest	0	-21	swapper/1	22:45:42	1
3576012	99	69	28,13	cyclictest	3740526	-21	if_eth0	23:40:22	1
3576012	99	68	37,4	cyclictest	3620472	-21	basename	21:25:15	1
3576012	99	68	34,7	cyclictest	3669002	-21	idleruntime-cro	22:20:01	1
3576011	99	67	59,6	cyclictest	3768124	-21	kworker/u4:4+events_unbound	00:23:34	0
3576011	99	67	46,13	cyclictest	256	50	irq/23-42890000.ethernet	19:10:00	0
3576012	99	66	61,3	cyclictest	3733076	-21	kworker/u4:10+events_unbound	23:32:08	1
3576012	99	66	39,17	cyclictest	0	-21	swapper/1	00:10:20	1
3576012	99	66	35,4	cyclictest	3709225	-21	df_abs	23:05:17	1
3576012	99	66	3,28	cyclictest	1073	-21	snmpd	22:42:25	1
3576012	99	66	32,4	cyclictest	0	-21	swapper/1	20:45:28	1
3576012	99	66	30,7	cyclictest	0	-21	swapper/1	23:15:37	1
3576011	99	65	57,6	cyclictest	3667115	-21	kworker/u4:6+events_unbound	22:56:59	0
3576011	99	65	51,8	cyclictest	3627178	-21	kworker/u4:1-rpciod	21:48:51	0
3576011	99	65	45,13	cyclictest	3582373	-21	modprobe	19:35:00	0
3576012	99	64	32,7	cyclictest	3627178	-21	kworker/u4:1-rpciod	21:40:21	1
3576011	99	64	47,13	cyclictest	53	-21	kswapd0	21:50:08	0
3576011	99	63	43,14	cyclictest	3637872	-21	modprobe	21:45:01	0
3576012	99	62	32,5	cyclictest	3735753	-21	sed	23:35:17	1
3576011	99	61	52,6	cyclictest	3601527	-21	kworker/u4:0+events_unbound	21:10:00	0
3576011	99	61	49,9	cyclictest	3597690	-21	kworker/u4:7+events_unbound	21:10:05	0
3576011	99	60	52,6	cyclictest	3696284	-21	/usr/sbin/munin	22:50:24	0
3576011	99	60	52,5	cyclictest	15	1	ktimers/0	22:11:57	0
3576011	99	60	50,7	cyclictest	3647139	-21	aten_r7power_cu	21:55:16	0
3576011	99	60	46,9	cyclictest	3604178	-21	cron	21:00:00	0
3576011	99	60	43,14	cyclictest	3620714	-21	fschecks_count	21:25:19	0
3576012	99	58	51,4	cyclictest	53	-21	kswapd0	21:40:01	1
3576012	99	58	29,7	cyclictest	0	-21	swapper/1	20:25:02	1
3576011	99	58	38,5	cyclictest	3713121	-21	latency_hist	23:10:00	0
3576012	99	57	40,10	cyclictest	3581108	-21	kworker/u4:2	19:30:00	1
3576011	99	57	52,3	cyclictest	3755632	-21	kworker/u4:6+events_unbound	00:05:00	0
3576011	99	57	52,3	cyclictest	3755632	-21	kworker/u4:6+events_unbound	00:05:00	0
3576012	99	56	51,3	cyclictest	3560764	-21	kworker/u4:5+events_unbound	20:26:30	1
3576011	99	56	45,8	cyclictest	3687491	-21	/usr/sbin/munin	22:40:22	0
3576011	99	56	42,11	cyclictest	53	-21	kswapd0	00:35:11	0
3576011	99	56	39,13	cyclictest	3730851	-21	latency_hist	23:30:01	0
3576012	99	55	45,8	cyclictest	3593832	-21	systemd	20:16:28	1
3576011	99	55	32,19	cyclictest	0	-21	swapper/0	23:33:30	0
3576011	99	54	46,6	cyclictest	3649072	-21	kworker/u4:14+events_unbound	22:08:45	0
3576011	99	54	46,5	cyclictest	3612472	-21	ssh	21:15:45	0
3576011	99	54	46,5	cyclictest	3612472	-21	ssh	21:15:45	0
3576011	99	54	33,14	cyclictest	3770659	-21	ssh	00:15:25	0
3576012	99	53	43,6	cyclictest	37	-21	kcompactd0	23:15:02	1
3576011	99	53	46,5	cyclictest	3590019	-21	kworker/u4:4+events_unbound	20:01:30	0
3576012	99	51	34,12	cyclictest	0	-21	swapper/1	22:35:33	1
3576012	99	51	34,12	cyclictest	0	-21	swapper/1	22:35:33	1
3576011	99	51	38,9	cyclictest	3752968	-21	modprobe	23:55:00	0
3576011	99	51	29,18	cyclictest	3584170	-21	fschecks_time	19:40:19	0
3576012	99	50	44,4	cyclictest	3589440	-21	kernelversion	20:00:22	1
3576012	99	50	39,7	cyclictest	3604212	-21	sendmail	21:00:00	1
3576011	99	50	46,2	cyclictest	3785536	-21	kworker/u4:1+events_unbound	00:35:00	0
3576011	99	50	46,2	cyclictest	3785536	-21	kworker/u4:1+events_unbound	00:35:00	0
3576011	99	50	38,8	cyclictest	3577261	-21	modprobe	19:15:00	0
3576012	99	49	42,5	cyclictest	3576009	-21	cyclictest	00:33:39	1
3576012	99	49	42,5	cyclictest	3576009	-21	cyclictest	00:33:39	1
3576012	99	49	42,5	cyclictest	3560764	-21	kworker/u4:5+events_unbound	20:31:31	1
3576012	99	49	40,7	cyclictest	3706703	-21	systemd	23:01:57	1
3576011	99	49	6,33	cyclictest	3674613	-21	rm	22:25:36	0
3576011	99	49	5,32	cyclictest	3586005	-21	timerwakeupswit	19:45:40	0
3576011	99	49	42,5	cyclictest	3606718	-21	kworker/u4:16+events_unbound	21:30:02	0
3576011	99	49	40,5	cyclictest	0	-21	swapper/0	20:35:38	0
3576012	99	48	41,5	cyclictest	3759110	-21	/usr/sbin/munin	00:00:43	1
3576012	99	48	41,5	cyclictest	3759110	-21	/usr/sbin/munin	00:00:43	1
3576012	99	48	41,5	cyclictest	3728863	-21	sshd	23:27:03	1
3576012	99	48	40,5	cyclictest	3669527	-21	df_abs	22:20:17	1
3576012	99	48	40,5	cyclictest	3583982	-21	aten_r7power_vo	19:40:16	1
3576012	99	48	38,8	cyclictest	3576009	-21	cyclictest	21:20:09	1
3576012	99	48	38,8	cyclictest	3576009	-21	cyclictest	21:20:09	1
3576012	99	48	38,7	cyclictest	3770057	-21	aten_r7power_cu	00:15:15	1
3576012	99	48	38,7	cyclictest	3699846	-21	apt-get	22:55:05	1
3576011	99	48	43,4	cyclictest	3609731	-21	kworker/u4:1+events_unbound	21:21:45	0
3576011	99	48	43,4	cyclictest	3609731	-21	kworker/u4:1+events_unbound	21:21:45	0
3576011	99	48	40,6	cyclictest	3779002	-21	/usr/sbin/munin	00:25:17	0
3576011	99	48	40,6	cyclictest	3729215	-21	kworker/u4:5+events_unbound	23:35:36	0
3576011	99	48	38,8	cyclictest	3720263	-21	ssh	23:17:25	0
3576011	99	48	35,10	cyclictest	3577245	-21	kworker/u4:11+events_unbound	19:24:55	0
3576012	99	47	40,5	cyclictest	3590613	-21	gltestperf	20:05:22	1
3576011	99	47	38,6	cyclictest	3586786	-21	gltestperf	19:50:25	0
3576011	99	47	38,6	cyclictest	3586786	-21	gltestperf	19:50:25	0
3576011	99	47	35,8	cyclictest	0	-21	swapper/0	23:55:18	0
3576011	99	47	26,6	cyclictest	0	-21	swapper/0	23:45:22	0
3576012	99	46	40,4	cyclictest	3576409	-21	basename	19:10:19	1
3576012	99	46	39,5	cyclictest	3676129	-21	kworker/u4:4-rpciod	22:30:30	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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