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 376 highest latencies:

System rack7slot2.osadl.org (updated Sat Aug 29, 2026 00:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2911882	99	93	85,6	cyclictest	3100400	-21	kworker/u4:11+events_unbound	00:08:09	0
2911882	99	93	85,6	cyclictest	3047445	-21	kworker/u4:6+events_unbound	23:11:27	0
2911882	99	92	83,6	cyclictest	3047444	-21	kworker/u4:4+events_unbound	23:41:33	0
2911882	99	91	83,6	cyclictest	2967518	-21	kworker/u4:13+events_unbound	21:41:08	0
2911882	99	89	81,6	cyclictest	3092007	-21	kworker/u4:8+events_unbound	00:18:35	0
2911882	99	89	52,34	cyclictest	53	-21	kswapd0	23:25:13	0
2911882	99	87	79,6	cyclictest	3047445	-21	kworker/u4:6+events_unbound	23:16:29	0
2911882	99	84	76,6	cyclictest	2993963	-21	kworker/u4:8+events_unbound	22:11:14	0
2911882	99	83	75,6	cyclictest	3007491	-21	kworker/u4:1+events_unbound	22:51:22	0
2911882	99	82	73,7	cyclictest	2981050	-21	kworker/u4:0+events_unbound	22:06:14	0
2911882	99	81	73,6	cyclictest	3042922	-21	kworker/u4:3+events_unbound	23:06:27	0
2911883	99	80	39,36	cyclictest	0	-21	swapper/1	22:30:14	1
2911883	99	74	32,38	cyclictest	0	-21	swapper/1	23:35:12	1
2911883	99	73	5,10	cyclictest	3090461	-21	ntpq	23:55:29	1
2911882	99	72	1,23	cyclictest	2924729	-21	apt-get	20:00:08	0
2911883	99	70	35,32	cyclictest	2914192	-21	timerandwakeup	19:15:38	1
2911883	99	69	37,29	cyclictest	3036733	-21	fschecks_time	22:55:21	1
2911882	99	69	54,13	cyclictest	53	-21	kswapd0	22:40:13	0
2911883	99	68	2,15	cyclictest	3000748	-21	apt-get	22:15:12	1
2911883	99	67	42,22	cyclictest	3128445	-21	systemd	00:38:40	1
2911883	99	67	37,27	cyclictest	0	-21	swapper/1	20:15:35	1
2911883	99	67	33,31	cyclictest	0	-21	swapper/1	23:16:46	1
2911883	99	67	31,32	cyclictest	0	-21	swapper/1	22:40:14	1
2911883	99	66	55,7	cyclictest	37	-21	kcompactd0	22:49:40	1
2911883	99	66	55,7	cyclictest	37	-21	kcompactd0	22:49:40	1
2911883	99	66	36,26	cyclictest	0	-21	swapper/1	19:20:40	1
2911882	99	66	58,6	cyclictest	3061039	-21	kworker/u4:11+events_unbound	23:31:32	0
2911883	99	65	34,29	cyclictest	3045261	-21	aten2__	23:05:17	1
2911882	99	65	57,6	cyclictest	2924693	-21	kworker/u4:1+events_unbound	20:20:58	0
2911882	99	65	50,12	cyclictest	3117432	-21	switchtime	00:25:40	0
2911883	99	64	5,9	cyclictest	3059560	-21	ps	23:20:39	1
2911883	99	64	56,6	cyclictest	2938840	-21	kworker/u4:14+events_unbound	21:16:04	1
2911883	99	64	36,25	cyclictest	2992505	-21	kernelversion	22:05:23	1
2911882	99	64	56,6	cyclictest	3020954	-21	kworker/u4:8+events_unbound	22:56:22	0
2911882	99	64	54,7	cyclictest	3087494	-21	kworker/u4:2+events_unbound	00:03:08	0
2911883	99	63	29,31	cyclictest	2942447	-21	threads	21:05:35	1
2911883	99	63	27,33	cyclictest	2931296	-21	latency_hist	20:25:01	1
2911883	99	63	27,32	cyclictest	0	-21	swapper/1	00:30:18	1
2911883	99	63	2,17	cyclictest	3094940	-21	sh	00:00:31	1
2911883	99	62	29,30	cyclictest	0	-21	swapper/1	22:40:00	1
2911883	99	62	1,12	cyclictest	3010491	-21	ssh	22:25:34	1
2911882	99	62	53,7	cyclictest	2914395	-21	kworker/u4:11+events_unbound	19:25:00	0
2911883	99	61	41,6	cyclictest	2909376	-21	kworker/u4:3+events_unbound	19:30:42	1
2911883	99	61	29,30	cyclictest	0	-21	swapper/1	22:20:24	1
2911883	99	61	27,30	cyclictest	0	-21	swapper/1	22:50:31	1
2911883	99	61	26,30	cyclictest	0	-21	swapper/1	20:50:14	1
2911883	99	61	24,34	cyclictest	0	-21	swapper/1	22:00:35	1
2911883	99	61	23,36	cyclictest	3108069	-21	netstat	00:15:23	1
2911883	99	61	14,43	cyclictest	2911892	-21	grep	19:10:01	1
2911882	99	61	6,6	cyclictest	0	-21	swapper/0	21:50:29	0
2911882	99	61	52,6	cyclictest	3061037	-21	kworker/u4:6+events_unbound	23:40:00	0
2911882	99	61	45,11	cyclictest	0	-21	swapper/0	21:45:10	0
2911883	99	60	5,16	cyclictest	2952974	-21	ntpq	21:20:44	1
2911883	99	60	46,9	cyclictest	3041704	-21	ssh	23:00:37	1
2911883	99	60	29,28	cyclictest	0	-21	swapper/1	00:05:30	1
2911883	99	60	28,28	cyclictest	0	-21	swapper/1	22:10:12	1
2911883	99	60	27,30	cyclictest	2928347	-21	switchtime	20:10:37	1
2911883	99	60	26,30	cyclictest	0	-21	swapper/1	23:50:27	1
2911883	99	60	2,15	cyclictest	3068270	-21	ssh	23:30:29	1
2911882	99	60	38,13	cyclictest	0	-21	swapper/0	21:20:19	0
2911883	99	59	27,29	cyclictest	3117397	-21	switchtime	00:25:41	1
2911883	99	59	2,15	cyclictest	2966116	-21	ntpq	21:35:33	1
2911882	99	59	53,4	cyclictest	2929885	-21	kworker/u4:2+events_unbound	20:30:01	0
2911882	99	59	50,6	cyclictest	3042117	-21	/usr/sbin/munin	23:00:42	0
2911883	99	58	3,17	cyclictest	2983726	-21	ssh	21:55:27	1
2911883	99	58	30,26	cyclictest	0	-21	swapper/1	19:45:01	1
2911883	99	58	30,26	cyclictest	0	-21	swapper/1	19:45:00	1
2911883	99	58	27,28	cyclictest	0	-21	swapper/1	23:40:23	1
2911883	99	58	26,29	cyclictest	0	-21	swapper/1	21:50:38	1
2911883	99	58	26,28	cyclictest	0	-21	swapper/1	19:55:25	1
2911883	99	57	27,27	cyclictest	0	-21	swapper/1	23:45:34	1
2911883	99	57	24,30	cyclictest	0	-21	swapper/1	21:45:22	1
2911883	99	57	24,30	cyclictest	0	-21	swapper/1	21:15:01	1
2911883	99	57	22,32	cyclictest	0	-21	swapper/1	20:35:29	1
2911883	99	57	2,16	cyclictest	2933313	-21	ntpq	20:30:33	1
2911883	99	57	21,33	cyclictest	0	-21	swapper/1	23:25:13	1
2911883	99	57	17,36	cyclictest	2940264	-21	latency_hist	21:00:02	1
2911883	99	57	1,15	cyclictest	3102999	-21	apt-get	00:10:13	1
2911882	99	57	50,5	cyclictest	2938840	-21	kworker/u4:14+events_unbound	21:15:05	0
2911883	99	56	3,16	cyclictest	2921719	-21	ntpq	19:45:30	1
2911883	99	56	25,28	cyclictest	0	-21	swapper/1	21:40:25	1
2911883	99	56	20,33	cyclictest	2931468	-21	aten_r7power_en	20:25:18	1
2911883	99	56	20,33	cyclictest	0	-21	swapper/1	23:10:20	1
2911882	99	56	7,42	cyclictest	0	-21	swapper/0	19:35:05	0
2911882	99	56	48,6	cyclictest	2920886	-21	kworker/u4:7+events_unbound	19:55:47	0
2911883	99	55	26,27	cyclictest	0	-21	swapper/1	21:25:40	1
2911883	99	55	25,27	cyclictest	0	-21	swapper/1	20:00:28	1
2911883	99	55	22,29	cyclictest	0	-21	swapper/1	21:31:43	1
2911883	99	55	2,15	cyclictest	2941062	-21	ps	21:00:34	1
2911883	99	55	19,33	cyclictest	0	-21	swapper/1	19:25:15	1
2911883	99	55	19,33	cyclictest	0	-21	swapper/1	19:25:15	1
2911882	99	55	48,5	cyclictest	2940146	-21	sendmail	21:00:00	0
2911882	99	55	47,6	cyclictest	3007495	-21	kworker/u4:12+events_unbound	22:26:15	0
2911882	99	55	44,8	cyclictest	2917882	-21	/usr/sbin/munin	19:30:37	0
2911882	99	55	40,9	cyclictest	3016447	-21	kworker/u4:0-rpciod	22:34:55	0
2911883	99	54	24,27	cyclictest	0	-21	swapper/1	20:40:17	1
2911882	99	54	46,5	cyclictest	2942752	-21	latency_hist	21:10:04	0
2911882	99	54	41,11	cyclictest	0	-21	swapper/0	21:25:16	0
2911882	99	54	2,43	cyclictest	3059515	-21	ntpq	23:20:37	0
2911882	99	53	47,4	cyclictest	3005966	-21	gcc	22:20:28	0
2911882	99	53	41,8	cyclictest	0	-21	swapper/0	21:35:29	0
2911883	99	52	25,25	cyclictest	3111987	-21	aten_r7power_en	00:20:15	1
2911883	99	52	25,25	cyclictest	0	-21	swapper/1	19:15:00	1
2911882	99	52	44,5	cyclictest	0	-21	swapper/0	23:45:29	0
2911882	99	52	43,7	cyclictest	3007494	-21	kworker/u4:10+events_unbound	22:45:36	0
2911882	99	52	43,7	cyclictest	3007494	-21	kworker/u4:10+events_unbound	22:45:35	0
2911882	99	52	43,6	cyclictest	3105541	-21	ssh	00:12:33	0
2911882	99	52	41,8	cyclictest	378	-21	dbus-daemon	20:30:56	0
2911882	99	52	38,12	cyclictest	3019753	-21	sh	22:35:40	0
2911883	99	51	19,29	cyclictest	0	-21	swapper/1	20:05:34	1
2911883	99	51	19,29	cyclictest	0	-21	swapper/1	20:05:33	1
2911883	99	51	16,32	cyclictest	0	-21	swapper/1	20:45:19	1
2911882	99	51	43,6	cyclictest	3086588	-21	/usr/sbin/munin	23:50:39	0
2911883	99	50	2,13	cyclictest	2919616	-21	modprobe	19:40:00	1
2911882	99	50	40,7	cyclictest	2941441	-21	ls	21:05:00	0
2911882	99	48	39,7	cyclictest	3001968	-21	unixbench-2d	22:15:40	0
2911882	99	48	38,7	cyclictest	3105543	-21	kworker/u4:0+events_unbound	00:30:16	0
2911883	99	47	21,24	cyclictest	0	-21	swapper/1	19:50:33	1
2911882	99	47	39,6	cyclictest	3122916	-21	kworker/u4:7+events_unbound	00:35:21	0
2911882	99	47	37,6	cyclictest	2988084	-21	/usr/sbin/munin	22:00:22	0
2911882	99	47	27,17	cyclictest	0	-21	swapper/0	21:55:33	0
2911882	99	46	39,5	cyclictest	3112984	-21	xargs	00:20:39	0
2911882	99	46	39,5	cyclictest	2961599	-21	ldconfig	21:30:29	0
2911882	99	46	37,7	cyclictest	2927348	-21	kworker/u4:13+events_unbound	20:51:02	0
2911882	99	45	38,5	cyclictest	2926531	-21	cut	20:05:17	0
2911882	99	45	38,5	cyclictest	2926531	-21	cut	20:05:17	0
2911882	99	45	36,7	cyclictest	2936601	-21	aten_r7power_po	20:45:15	0
2911882	99	44	36,6	cyclictest	2943411	-21	fschecks_time	21:10:19	0
2911882	99	44	35,7	cyclictest	2927547	-21	aten2__	20:10:14	0
2911882	99	44	35,6	cyclictest	2929075	-21	fschecks_count	20:15:18	0
2911882	99	43	36,5	cyclictest	3089849	-21	basename	23:55:16	0
2911882	99	43	35,5	cyclictest	2934166	-21	fschecks_count	20:35:18	0
2911882	99	43	33,7	cyclictest	2915974	-21	aten_r7power_po	19:25:16	0
2911882	99	43	33,7	cyclictest	2915974	-21	aten_r7power_po	19:25:15	0
2911882	99	43	33,6	cyclictest	2912093	-21	aten_r7power_en	19:10:14	0
2911882	99	42	33,7	cyclictest	2921011	-21	latency_hist	19:45:02	0
2911882	99	42	33,7	cyclictest	2921011	-21	latency_hist	19:45:01	0
2911882	99	42	33,6	cyclictest	2516070	-21	kworker/u4:2-rpciod	19:10:00	0
2911882	99	41	31,8	cyclictest	2923167	-21	switchtime	19:50:37	0
2911882	99	41	31,6	cyclictest	0	-21	swapper/0	20:40:12	0
2911882	99	41	31,6	cyclictest	0	-21	swapper/0	19:15:30	0
2911882	99	39	25,12	cyclictest	0	-21	swapper/0	19:50:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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