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 Feb 11, 2026 00:44:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2882125	99	103	97,4	cyclictest	2959337	-21	kworker/u4:7+events_unbound	22:26:25	1
2882125	99	93	85,5	cyclictest	3032199	-21	kworker/u4:7+events_unbound	23:26:34	1
2882125	99	91	82,6	cyclictest	3049644	-21	kworker/u4:4+events_unbound	23:51:34	1
2882122	99	91	67,14	cyclictest	54	-21	kswapd0	23:00:13	0
2882125	99	86	79,5	cyclictest	3075814	-21	kworker/u4:13+events_unbound	00:21:33	1
2882122	99	80	34,40	cyclictest	3005074	-21	fschecks_count	22:55:20	0
2882122	99	80	27,29	cyclictest	2939201	-21	latency_hist	21:40:02	0
2882122	99	79	49,10	cyclictest	2882123	-21	modprobe	19:09:59	0
2882122	99	78	22,42	cyclictest	0	-21	swapper/0	23:15:34	0
2882125	99	76	68,6	cyclictest	3019765	-21	kworker/u4:3+events_unbound	23:21:33	1
2882125	99	76	68,5	cyclictest	2959336	-21	kworker/u4:6+events_unbound	22:31:27	1
2882122	99	76	3,68	cyclictest	3073364	-21	apt-get	00:15:10	0
2882122	99	76	24,40	cyclictest	0	-21	swapper/0	23:20:29	0
2882125	99	75	68,5	cyclictest	2884605	-21	kworker/u4:15+events_unbound	19:50:00	1
2882125	99	75	66,7	cyclictest	2963766	-21	kworker/u4:12+events_unbound	22:10:01	1
2882122	99	75	26,28	cyclictest	0	-21	swapper/0	23:05:20	0
2882122	99	74	42,29	cyclictest	388	-21	dbus-daemon	23:31:32	0
2882122	99	74	29,41	cyclictest	3081971	-21	apt-get	00:25:14	0
2882122	99	74	18,37	cyclictest	0	-21	swapper/0	20:50:36	0
2882122	99	73	24,28	cyclictest	0	-21	swapper/0	21:25:37	0
2882125	99	72	63,7	cyclictest	3088267	-21	kworker/u4:3+events_unbound	00:35:01	1
2882122	99	72	41,29	cyclictest	3040222	-21	grep	23:35:40	0
2882122	99	72	24,29	cyclictest	0	-21	swapper/0	20:45:25	0
2882122	99	71	1,46	cyclictest	2883377	-21	modprobe	19:15:01	0
2882122	99	71	1,46	cyclictest	2883377	-21	modprobe	19:15:01	0
2882125	99	70	62,6	cyclictest	3002895	-21	kworker/u4:10+events_unbound	22:56:30	1
2882122	99	70	24,24	cyclictest	255	50	irq/23-42890000.ethernet	22:05:18	0
2882122	99	69	35,32	cyclictest	2996197	-21	cpu	22:45:17	0
2882122	99	69	31,21	cyclictest	2975332	-21	switchtime	22:20:37	0
2882122	99	69	1,43	cyclictest	3091461	-21	ps	00:35:39	0
2882122	99	68	2,41	cyclictest	2953222	-21	ntpq	21:55:28	0
2882122	99	67	37,28	cyclictest	3031708	-21	unixbench_multi	23:25:38	0
2882122	99	67	3,36	cyclictest	2991041	-21	ssh	22:39:33	0
2882122	99	67	3,36	cyclictest	2925121	-21	ssh	21:23:44	0
2882122	99	67	28,36	cyclictest	0	-21	swapper/0	19:35:00	0
2882122	99	67	2,61	cyclictest	3077672	-21	apt-get	00:20:12	0
2882122	99	67	23,41	cyclictest	2899683	-21	sed	20:15:36	0
2882122	99	67	23,41	cyclictest	2899683	-21	sed	20:15:35	0
2882125	99	66	58,6	cyclictest	2894878	-21	kworker/u4:5+events_unbound	20:05:01	1
2882122	99	66	35,28	cyclictest	2896387	-21	aten_r7power_cu	20:05:15	0
2882122	99	66	32,30	cyclictest	2984081	-21	ssh	22:30:43	0
2882122	99	66	19,28	cyclictest	0	-21	swapper/0	20:55:41	0
2882122	99	66	1,41	cyclictest	2981560	-21	ssh	22:28:16	0
2882122	99	65	30,32	cyclictest	0	-21	swapper/0	00:05:32	0
2882122	99	65	14,28	cyclictest	0	-21	swapper/0	23:10:27	0
2882122	99	65	0,45	cyclictest	3052368	-21	/usr/sbin/munin	23:50:20	0
2882125	99	64	53,9	cyclictest	2989602	-21	kworker/u4:5+events_unbound	22:41:28	1
2882122	99	64	57,5	cyclictest	2963127	-21	kworker/u4:11+events_unbound	22:16:27	0
2882122	99	64	33,28	cyclictest	2902798	-21	aten_r7power_vo	20:30:17	0
2882122	99	64	31,31	cyclictest	3011075	-21	kworker/u4:2-rpciod	23:40:34	0
2882122	99	64	2,58	cyclictest	3056184	-21	apt-get	23:55:10	0
2882122	99	64	2,58	cyclictest	2917439	-21	apt-get	21:15:11	0
2882122	99	64	2,38	cyclictest	2944614	-21	ntp_states	21:45:34	0
2882122	99	64	2,35	cyclictest	2894378	-21	ntpq	19:55:27	0
2882125	99	62	51,8	cyclictest	2898670	-21	kworker/u4:13+events_unbound	20:20:01	1
2882125	99	62	51,8	cyclictest	2898670	-21	kworker/u4:13+events_unbound	20:20:00	1
2882122	99	62	5,51	cyclictest	2885454	-21	ntpq	19:20:31	0
2882122	99	62	3,53	cyclictest	3048302	-21	ssh	23:45:25	0
2882122	99	62	34,26	cyclictest	2889810	-21	http	19:40:00	0
2882122	99	62	3,41	cyclictest	2956865	-21	apt-get	22:00:13	0
2882122	99	62	2,35	cyclictest	3068788	-21	apt-get	00:10:03	0
2882122	99	62	1,38	cyclictest	2901234	-21	modprobe	20:25:00	0
2882122	99	62	11,31	cyclictest	3000651	-21	diskstats	22:50:19	0
2882125	99	61	53,4	cyclictest	0	-21	swapper/1	22:00:36	1
2882125	99	61	41,9	cyclictest	3019765	-21	kworker/u4:3+events_unbound	23:45:20	1
2882122	99	61	3,53	cyclictest	2912325	-21	ntpq	21:05:32	0
2882122	99	61	3,51	cyclictest	2992453	-21	ssh	22:40:30	0
2882122	99	61	29,28	cyclictest	0	-21	swapper/0	00:30:31	0
2882122	99	61	1,42	cyclictest	2913330	-21	df_inode	21:10:17	0
2882122	99	60	3,51	cyclictest	2901410	-21	apt-get	20:25:13	0
2882122	99	60	3,50	cyclictest	2893198	-21	ntpq	19:50:31	0
2882122	99	60	2,56	cyclictest	2930603	-21	apt-get	21:30:11	0
2882122	99	60	2,53	cyclictest	2895702	-21	ntpq	20:00:29	0
2882122	99	60	25,29	cyclictest	0	-21	swapper/0	21:50:34	0
2882122	99	60	2,42	cyclictest	2910651	-21	/usr/sbin/munin	21:00:16	0
2882122	99	59	4,33	cyclictest	3058377	-21	kworker/u4:14-rpciod	00:05:02	0
2882122	99	59	3,51	cyclictest	2939368	-21	apt-get	21:40:12	0
2882122	99	59	2,54	cyclictest	2884104	-21	ntpq	19:15:25	0
2882122	99	59	2,54	cyclictest	2884104	-21	ntpq	19:15:24	0
2882122	99	59	2,53	cyclictest	2965554	-21	apt-get	22:10:17	0
2882122	99	58	3,51	cyclictest	2898159	-21	ntpq	20:10:25	0
2882122	99	58	2,51	cyclictest	2886647	-21	ntpq	19:25:26	0
2882125	99	57	52,4	cyclictest	2877266	-21	kworker/u4:8+events_unbound	19:10:01	1
2882125	99	57	49,6	cyclictest	2984528	-21	kworker/u4:17+events_unbound	22:46:28	1
2882122	99	57	2,52	cyclictest	2903921	-21	apt-get	20:35:11	0
2882122	99	57	1,38	cyclictest	2905430	-21	diskstats	20:40:17	0
2882125	99	56	48,6	cyclictest	2924377	-21	kworker/u4:0+events_unbound	21:26:17	1
2882122	99	56	2,51	cyclictest	2891843	-21	ntpq	19:45:25	0
2882122	99	56	2,51	cyclictest	2890026	-21	/usr/sbin/munin	19:40:09	0
2882125	99	54	47,5	cyclictest	2877266	-21	kworker/u4:8+events_unbound	20:00:02	1
2882125	99	53	45,6	cyclictest	3058375	-21	kworker/u4:12+events_unbound	00:10:03	1
2882125	99	53	45,6	cyclictest	2902475	-21	kworker/u4:1+events_unbound	21:36:58	1
2882125	99	53	44,6	cyclictest	3015410	-21	kworker/u4:16+events_unbound	23:35:00	1
2882125	99	53	42,8	cyclictest	3057504	-21	vmstat	23:55:39	1
2882125	99	52	48,3	cyclictest	3015407	-21	kworker/u4:13-rpciod	23:11:59	1
2882125	99	52	44,6	cyclictest	3015410	-21	kworker/u4:16+events_unbound	23:16:31	1
2882125	99	52	41,9	cyclictest	2949882	-21	systemd	21:51:20	1
2882125	99	52	40,6	cyclictest	0	-21	swapper/1	23:40:16	1
2882125	99	51	44,5	cyclictest	2969638	-21	latency_hist	22:15:01	1
2882125	99	51	44,5	cyclictest	2882120	-21	cyclictest	21:56:19	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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