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 Thu Aug 13, 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
3075970	99	92	85,5	cyclictest	3136670	-21	kworker/u4:10+events_unbound	09:50:38	0
3075970	99	86	45,10	cyclictest	53	-21	kswapd0	10:20:06	0
3075970	99	78	39,8	cyclictest	3192978	-21	/usr/sbin/munin	10:45:21	0
3075972	99	77	69,5	cyclictest	3145102	-21	kworker/u4:2+events_unbound	09:59:59	1
3075970	99	75	62,8	cyclictest	3223683	-21	apt-get	11:20:12	0
3075970	99	75	62,8	cyclictest	3223683	-21	apt-get	11:20:11	0
3075972	99	71	28,40	cyclictest	0	-21	swapper/1	09:10:29	1
3075972	99	71	28,40	cyclictest	0	-21	swapper/1	09:10:29	1
3075972	99	70	33,34	cyclictest	0	-21	swapper/1	10:25:24	1
3075970	99	70	55,8	cyclictest	3189950	-21	kworker/u4:11-xprtiod	10:41:42	0
3075970	99	70	44,22	cyclictest	53	-21	kswapd0	12:20:14	0
3075972	99	69	64,3	cyclictest	3199007	-21	kworker/u4:1+events_unbound	10:55:50	1
3075972	99	69	32,35	cyclictest	0	-21	swapper/1	11:20:32	1
3075972	99	69	32,35	cyclictest	0	-21	swapper/1	11:20:32	1
3075972	99	69	29,38	cyclictest	0	-21	swapper/1	10:10:15	1
3075972	99	68	63,3	cyclictest	3252792	-21	kworker/u4:9+events_unbound	12:16:03	1
3075970	99	68	7,18	cyclictest	3075971	-21	idleruntime-cro	07:10:01	0
3075970	99	68	49,11	cyclictest	3095304	-21	kworker/u4:6	08:24:59	0
3075972	99	67	56,8	cyclictest	3083591	-21	kworker/u4:13+events_unbound	08:20:23	1
3075970	99	67	56,8	cyclictest	3289453	-21	sh	12:33:42	0
3075972	99	65	36,26	cyclictest	3245660	-21	cron	11:44:59	1
3075972	99	65	32,30	cyclictest	0	-21	swapper/1	12:30:28	1
3075972	99	65	30,31	cyclictest	0	-21	swapper/1	11:45:25	1
3075972	99	64	29,33	cyclictest	0	-21	swapper/1	12:20:42	1
3075972	99	64	26,34	cyclictest	0	-21	swapper/1	09:50:20	1
3075970	99	64	55,6	cyclictest	3248246	-21	kworker/u4:4+events_unbound	12:01:02	0
3075972	99	63	37,23	cyclictest	3232385	-21	latency_hist	11:30:00	1
3075972	99	63	31,29	cyclictest	0	-21	swapper/1	08:00:39	1
3075972	99	63	26,34	cyclictest	0	-21	swapper/1	09:45:31	1
3075972	99	62	28,31	cyclictest	0	-21	swapper/1	08:05:02	1
3075972	99	61	6,50	cyclictest	3116239	-21	ssh	09:20:13	1
3075972	99	61	50,8	cyclictest	3081046	-21	kworker/u4:0+events_unbound	07:50:15	1
3075972	99	61	39,19	cyclictest	3106887	-21	grep	09:10:06	1
3075972	99	61	36,23	cyclictest	3075968	-21	cyclictest	10:15:23	1
3075972	99	61	30,28	cyclictest	0	-21	swapper/1	10:00:26	1
3075972	99	61	28,30	cyclictest	0	-21	swapper/1	10:45:26	1
3075972	99	61	27,32	cyclictest	3103887	-21	mailstats	08:55:35	1
3075972	99	61	24,33	cyclictest	0	-21	swapper/1	12:27:48	1
3075972	99	61	22,35	cyclictest	0	-21	swapper/1	10:05:36	1
3075972	99	61	2,11	cyclictest	3251230	-21	ssh	11:50:31	1
3075972	99	60	3,16	cyclictest	3188269	-21	ssh	10:40:19	1
3075972	99	60	29,28	cyclictest	0	-21	swapper/1	10:30:21	1
3075972	99	60	28,29	cyclictest	0	-21	swapper/1	11:05:35	1
3075970	99	60	54,4	cyclictest	3274338	-21	sshd	12:16:02	0
3075972	99	59	3,17	cyclictest	3220144	-21	ps	11:15:36	1
3075972	99	59	29,27	cyclictest	3081047	-21	kworker/u4:1+rpciod	08:25:17	1
3075972	99	59	27,28	cyclictest	0	-21	swapper/1	07:35:27	1
3075972	99	59	26,31	cyclictest	0	-21	swapper/1	11:00:45	1
3075972	99	59	26,30	cyclictest	0	-21	swapper/1	10:39:13	1
3075972	99	59	26,30	cyclictest	0	-21	swapper/1	10:39:12	1
3075972	99	59	23,33	cyclictest	0	-21	swapper/1	10:50:16	1
3075970	99	59	40,10	cyclictest	3090099	-21	kworker/u4:4	08:05:01	0
3075972	99	58	29,27	cyclictest	3075968	-21	cyclictest	12:10:17	1
3075972	99	58	28,26	cyclictest	0	-21	swapper/1	10:20:25	1
3075972	99	58	26,30	cyclictest	0	-21	swapper/1	11:35:00	1
3075972	99	58	25,30	cyclictest	0	-21	swapper/1	08:35:15	1
3075972	99	58	24,31	cyclictest	0	-21	swapper/1	11:10:16	1
3075972	99	58	24,31	cyclictest	0	-21	swapper/1	11:10:16	1
3075972	99	58	23,32	cyclictest	0	-21	swapper/1	12:35:26	1
3075972	99	58	23,31	cyclictest	0	-21	swapper/1	07:30:02	1
3075972	99	58	19,36	cyclictest	0	-21	swapper/1	12:00:16	1
3075972	99	58	18,5	cyclictest	3130637	-21	ssh	09:35:34	1
3075972	99	58	13,8	cyclictest	0	-21	swapper/1	09:15:12	1
3075970	99	58	51,5	cyclictest	3252791	-21	kworker/u4:8+events_unbound	11:56:01	0
3075970	99	58	50,6	cyclictest	3122950	-21	kworker/u4:1+events_unbound	10:05:02	0
3075970	99	58	49,7	cyclictest	3090081	-21	kworker/u4:2+events_unbound	08:35:28	0
3075972	99	57	52,3	cyclictest	3081052	-21	kworker/u4:9+events_unbound	07:40:13	1
3075972	99	57	26,29	cyclictest	0	-21	swapper/1	07:45:18	1
3075972	99	57	26,28	cyclictest	0	-21	swapper/1	09:25:35	1
3075972	99	57	24,30	cyclictest	0	-21	swapper/1	11:55:25	1
3075972	99	57	19,35	cyclictest	0	-21	swapper/1	12:05:31	1
3075972	99	56	4,12	cyclictest	3079267	-21	ntpq	07:20:26	1
3075972	99	55	4,17	cyclictest	3237752	-21	ssh	11:35:25	1
3075972	99	55	24,28	cyclictest	0	-21	swapper/1	08:50:33	1
3075972	99	55	23,29	cyclictest	3081387	-21	aten_r7power_vo	07:30:17	1
3075972	99	55	22,30	cyclictest	0	-21	swapper/1	09:40:19	1
3075972	99	55	15,5	cyclictest	3094174	-21	sort	08:20:01	1
3075970	99	55	31,21	cyclictest	3127570	-21	kworker/u4:6+events_unbound	09:35:37	0
3075972	99	54	8,13	cyclictest	3126104	-21	ntp_states	09:30:33	1
3075972	99	54	23,28	cyclictest	0	-21	swapper/1	08:45:28	1
3075972	99	54	15,4	cyclictest	3104710	-21	fschecks_count	09:00:19	1
3075970	99	54	44,8	cyclictest	3175704	-21	timerandwakeup	10:25:39	0
3075970	99	54	32,19	cyclictest	3108417	-21	unixbench_singl	09:10:40	0
3075970	99	54	32,19	cyclictest	3108417	-21	unixbench_singl	09:10:40	0
3075972	99	53	25,25	cyclictest	0	-21	swapper/1	08:40:35	1
3075972	99	53	22,28	cyclictest	3097118	-21	gltestperf	08:30:20	1
3075972	99	53	22,28	cyclictest	0	-21	swapper/1	07:55:02	1
3075972	99	53	20,30	cyclictest	3076178	-21	aten_r7power_cu	07:10:15	1
3075970	99	53	47,3	cyclictest	0	-21	swapper/0	11:05:36	0
3075970	99	53	44,6	cyclictest	3136001	-21	kworker/u4:7+events_unbound	09:45:37	0
3075970	99	52	46,4	cyclictest	3215899	-21	timerandwakeup	11:10:40	0
3075970	99	52	46,4	cyclictest	3215899	-21	timerandwakeup	11:10:39	0
3075970	99	52	45,5	cyclictest	3106799	-21	diskmemload	11:50:34	0
3075970	99	52	44,6	cyclictest	3217171	-21	kworker/u4:11+events_unbound	11:32:47	0
3075970	99	52	43,6	cyclictest	3220442	-21	unixbench_multi	11:15:40	0
3075970	99	52	38,10	cyclictest	37	-21	kcompactd0	10:35:27	0
3075970	99	52	38,10	cyclictest	37	-21	kcompactd0	10:35:26	0
3075970	99	52	29,20	cyclictest	0	-21	swapper/0	12:25:26	0
3075972	99	51	15,7	cyclictest	3083591	-21	kworker/u4:13+rpciod	08:10:23	1
3075972	99	51	15,7	cyclictest	3083591	-21	kworker/u4:13+rpciod	08:10:22	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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