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 Wed Jul 01, 2026 12:44:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3455103	99	94	87,5	cyclictest	3456325	-21	kworker/u4:10+events_unbound	07:48:07	1
3455102	99	87	81,4	cyclictest	3471738	-21	kworker/u4:8+events_unbound	08:48:14	0
3455103	99	78	68,6	cyclictest	3466632	-21	kworker/u4:9+events_unbound	08:30:01	1
3455102	99	78	73,3	cyclictest	3546396	-21	kworker/u4:8+events_unbound	10:43:37	0
3455102	99	75	33,30	cyclictest	3455099	-21	awk	07:09:59	0
3455102	99	71	53,16	cyclictest	3446262	-21	kworker/u4:6+events_unbound	08:25:01	0
3455103	99	69	49,6	cyclictest	3648876	-21	kworker/u4:2+events_unbound	12:28:59	1
3455102	99	69	60,7	cyclictest	53	-21	kswapd0	12:10:01	0
3455102	99	69	60,7	cyclictest	53	-21	kswapd0	12:10:01	0
3455102	99	69	54,11	cyclictest	3669959	-21	grep	12:35:42	0
3455103	99	68	60,6	cyclictest	3456326	-21	kworker/u4:12+events_unbound	07:35:01	1
3455103	99	67	60,4	cyclictest	3519987	-21	kworker/u4:6+events_unbound	09:48:26	1
3455102	99	66	57,6	cyclictest	3613327	-21	kworker/u4:6+events_unbound	11:38:50	0
3455102	99	65	58,5	cyclictest	3599740	-21	kworker/u4:2+events_unbound	11:28:47	0
3455102	99	64	56,6	cyclictest	3648876	-21	kworker/u4:2+events_unbound	12:20:01	0
3455102	99	64	42,20	cyclictest	53	-21	kswapd0	11:05:34	0
3455102	99	64	42,20	cyclictest	53	-21	kswapd0	11:05:33	0
3455102	99	63	56,5	cyclictest	53	-21	kswapd0	09:50:01	0
3455102	99	63	54,7	cyclictest	3604290	-21	kworker/u4:0+events_unbound	11:43:51	0
3455102	99	61	47,8	cyclictest	3596889	-21	ssh	11:14:23	0
3455102	99	60	51,6	cyclictest	3475586	-21	kworker/u4:17+events_unbound	09:13:20	0
3455103	99	57	48,7	cyclictest	378	-21	dbus-daemon	11:53:52	1
3455102	99	55	47,5	cyclictest	3603094	-21	/usr/sbin/munin	11:20:37	0
3455102	99	55	46,7	cyclictest	3556456	-21	systemd	10:28:32	0
3455102	99	54	46,7	cyclictest	3483416	-21	systemd	08:58:15	0
3455102	99	54	42,8	cyclictest	3500443	-21	awk	09:25:24	0
3455103	99	53	44,7	cyclictest	3614346	-21	sd-accept	11:33:49	1
3455103	99	53	41,8	cyclictest	3471763	-21	sh	08:15:00	1
3455103	99	53	38,11	cyclictest	3504791	-21	head	09:30:27	1
3455102	99	53	44,7	cyclictest	3565316	-21	sshd	10:38:35	0
3455102	99	53	44,5	cyclictest	3504789	-21	gltestperf	09:30:27	0
3455102	99	53	42,9	cyclictest	3664191	-21	basename	12:30:00	0
3455102	99	53	38,12	cyclictest	3625538	-21	timerwakeupswit	11:45:39	0
3455103	99	52	45,5	cyclictest	3562737	-21	gltestperf	10:35:33	1
3455103	99	52	45,5	cyclictest	3508749	-21	apt-get	09:35:15	1
3455103	99	52	42,8	cyclictest	3609887	-21	sshd	11:28:48	1
3455103	99	52	42,8	cyclictest	0	-21	swapper/1	09:10:38	1
3455103	99	52	41,9	cyclictest	3467897	-21	sshd	07:57:12	1
3455103	99	52	41,8	cyclictest	3624424	-21	aten_r7power_cu	11:45:16	1
3455103	99	52	38,12	cyclictest	0	-21	swapper/1	11:00:13	1
3455102	99	52	44,5	cyclictest	3491717	-21	/usr/sbin/munin	09:15:39	0
3455102	99	52	36,4	cyclictest	3579910	-21	aten_r7power_cu	10:55:16	0
3455103	99	51	43,5	cyclictest	3598425	-21	ld	11:15:32	1
3455103	99	51	43,5	cyclictest	3598425	-21	ld	11:15:31	1
3455103	99	51	39,9	cyclictest	3476726	-21	timerandwakeup	08:30:43	1
3455103	99	51	38,9	cyclictest	37	-21	kcompactd0	12:19:58	1
3455102	99	51	44,5	cyclictest	3475585	-21	kworker/u4:16+events_unbound	08:35:00	0
3455102	99	51	41,8	cyclictest	3471742	-21	systemd	08:13:09	0
3455102	99	51	34,15	cyclictest	3530894	-21	sh	10:00:00	0
3455103	99	50	43,5	cyclictest	3665690	-21	grep	12:30:41	1
3455103	99	50	43,5	cyclictest	3495885	-21	kernelversion	09:20:23	1
3455103	99	50	43,5	cyclictest	3495885	-21	kernelversion	09:20:23	1
3455103	99	50	42,6	cyclictest	3491741	-21	/usr/sbin/munin	09:15:38	1
3455103	99	50	42,5	cyclictest	3618821	-21	sshd	11:38:50	1
3455103	99	50	40,8	cyclictest	3634393	-21	timerandwakeup	11:55:39	1
3455103	99	50	38,6	cyclictest	0	-21	swapper/1	10:45:29	1
3455103	99	49	43,4	cyclictest	3455100	-21	cyclictest	12:23:58	1
3455103	99	49	41,5	cyclictest	3567002	-21	gltestperf	10:40:21	1
3455102	99	49	41,6	cyclictest	3585253	-21	proc_pri	11:00:36	0
3455102	99	49	41,5	cyclictest	3481339	-21	fschecks_count	08:50:20	0
3455102	99	49	40,6	cyclictest	3460812	-21	gltestperf	07:30:20	0
3455103	99	48	42,4	cyclictest	3531954	-21	ntpq	10:00:29	1
3455103	99	48	41,5	cyclictest	3463425	-21	gltestperf	07:40:20	1
3455103	99	48	39,6	cyclictest	3638132	-21	/usr/sbin/munin	12:00:19	1
3455103	99	48	37,8	cyclictest	3472967	-21	sed	08:15:37	1
3455102	99	48	30,15	cyclictest	3519983	-21	kworker/u4:0-rpciod	10:10:25	0
3455102	99	48	30,15	cyclictest	3519983	-21	kworker/u4:0-rpciod	10:10:24	0
3455102	99	48	28,17	cyclictest	3509104	-21	fschecks_count	09:35:20	0
3455103	99	47	40,5	cyclictest	3459024	-21	munin-plugin-st	07:25:00	1
3455103	99	47	39,5	cyclictest	3457833	-21	latency_hist	07:20:01	1
3455103	99	47	39,5	cyclictest	0	-21	swapper/1	09:40:30	1
3455103	99	47	36,8	cyclictest	3584157	-21	latency_hist	11:00:01	1
3455103	99	47	35,9	cyclictest	37	-21	kcompactd0	12:36:43	1
3455102	99	47	40,5	cyclictest	3545130	-21	sh	10:15:27	0
3455102	99	47	40,5	cyclictest	3536843	-21	sed	10:05:41	0
3455102	99	47	40,5	cyclictest	3457605	-21	kworker/u4:14+events_unbound	07:52:01	0
3455102	99	47	37,8	cyclictest	3477265	-21	aten_r7power_cu	08:35:20	0
3455102	99	47	29,15	cyclictest	0	-21	swapper/0	12:31:27	0
3455102	99	47	25,20	cyclictest	3629132	-21	fschecks_count	11:50:19	0
3455103	99	46	41,3	cyclictest	27	1	ktimers/1	12:06:53	1
3455103	99	46	41,3	cyclictest	27	1	ktimers/1	12:06:52	1
3455103	99	46	40,4	cyclictest	3469230	-21	idleruntime-cro	08:05:00	1
3455103	99	46	39,5	cyclictest	3620043	-21	aten_r7power_po	11:40:16	1
3455103	99	46	39,5	cyclictest	3544118	-21	cron	10:15:00	1
3455103	99	46	39,5	cyclictest	3544118	-21	cron	10:14:59	1
3455103	99	46	38,6	cyclictest	3483746	-21	aten_r7power_po	09:00:16	1
3455103	99	46	38,5	cyclictest	3510819	-21	kworker/u4:9-rpciod	09:55:35	1
3455103	99	46	37,7	cyclictest	3593742	-21	tr	11:10:22	1
3455103	99	46	35,8	cyclictest	3538718	-21	sd-accept	10:08:28	1
3455103	99	46	35,7	cyclictest	0	-21	swapper/1	09:50:43	1
3455103	99	46	34,10	cyclictest	3589713	-21	proc_pri	11:05:38	1
3455103	99	46	34,10	cyclictest	3589713	-21	proc_pri	11:05:37	1
3455102	99	46	40,4	cyclictest	3633567	-21	fschecks_count	11:55:20	0
3455102	99	46	39,5	cyclictest	3468390	-21	fschecks_count	08:00:20	0
3455102	99	46	38,6	cyclictest	0	-21	swapper/0	10:00:15	0
3455102	99	46	35,9	cyclictest	3463511	-21	kernelversion	07:40:21	0
3455102	99	46	34,9	cyclictest	3465387	-21	sh	07:50:01	0
3455102	99	46	32,9	cyclictest	3456349	-21	modprobe	07:15:00	0
3455103	99	45	38,5	cyclictest	3602377	-21	fschecks_count	11:20:19	1
3455103	99	45	38,5	cyclictest	3554608	-21	head	10:25:41	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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