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 Mon Feb 02, 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
3643699	99	111	101,7	cyclictest	3738075	-21	kworker/u4:2+events_unbound	10:56:09	0
3643701	99	108	95,10	cyclictest	3703375	-21	kworker/u4:8+events_unbound	10:01:01	1
3643701	99	81	27,30	cyclictest	0	-21	swapper/1	11:45:25	1
3643701	99	81	27,30	cyclictest	0	-21	swapper/1	11:45:25	1
3643699	99	80	70,7	cyclictest	3669341	-21	kworker/u4:7+events_unbound	09:15:56	0
3643701	99	77	32,27	cyclictest	0	-21	swapper/1	07:35:32	1
3643699	99	77	71,4	cyclictest	3644996	-21	kworker/u4:4+events_unbound	07:15:29	0
3643699	99	76	4,14	cyclictest	3804586	-21	ssh	11:40:30	0
3643701	99	75	26,28	cyclictest	3665617	-21	sed	08:35:02	1
3643699	99	75	39,33	cyclictest	3655150	-21	unixbench_singl	07:50:36	0
3643699	99	75	29,44	cyclictest	3724820	-21	kworker/u4:7+rpciod	10:10:39	0
3643701	99	74	65,7	cyclictest	3738077	-21	kworker/u4:6+events_unbound	10:35:34	1
3643699	99	74	48,23	cyclictest	3803495	-21	munin-plugin-st	11:40:00	0
3643699	99	74	35,36	cyclictest	0	-21	swapper/0	12:20:03	0
3643699	99	74	34,36	cyclictest	0	-21	swapper/0	11:25:29	0
3643701	99	73	67,4	cyclictest	3644996	-21	kworker/u4:4+events_unbound	07:35:02	1
3643701	99	72	42,27	cyclictest	3773633	-21	acpi	11:05:12	1
3643701	99	72	40,30	cyclictest	3804521	-21	ntp_kernel_pll_	11:40:28	1
3643699	99	72	62,7	cyclictest	3634988	-21	kworker/u4:8+events_unbound	07:40:33	0
3643699	99	72	37,32	cyclictest	3830140	-21	fschecks_time	12:10:20	0
3643699	99	72	33,33	cyclictest	3664428	-21	aten2__	08:30:16	0
3643699	99	72	29,39	cyclictest	0	-21	swapper/0	08:35:40	0
3643699	99	71	5,16	cyclictest	3731678	-21	ssh	10:15:19	0
3643699	99	70	6,22	cyclictest	3650074	-21	modprobe	07:35:01	0
3643699	99	70	61,7	cyclictest	3822957	-21	kworker/u4:14+events_unbound	12:06:20	0
3643699	99	70	36,31	cyclictest	0	-21	swapper/0	09:45:00	0
3643699	99	70	35,31	cyclictest	3656599	-21	latency_hist	08:00:01	0
3643699	99	70	32,35	cyclictest	255	50	irq/23-42890000.ethernet	09:30:42	0
3643699	99	70	3,20	cyclictest	3813171	-21	ssh	11:50:29	0
3643701	99	69	36,30	cyclictest	0	-21	swapper/1	09:10:28	1
3643701	99	69	33,33	cyclictest	3846907	-21	latency_hist	12:30:01	1
3643699	99	69	31,36	cyclictest	3744686	-21	fschecks_count	10:30:20	0
3643699	99	69	31,35	cyclictest	3723391	-21	ntp_kernel_pll_	10:05:28	0
3643699	99	69	27,6	cyclictest	0	-21	swapper/0	12:25:31	0
3643701	99	68	3,56	cyclictest	3710391	-21	ssh	09:50:29	1
3643699	99	68	20,12	cyclictest	3675505	-21	ssh	09:10:29	0
3643701	99	67	32,32	cyclictest	3821381	-21	df_abs	12:00:17	1
3643699	99	67	6,26	cyclictest	3795929	-21	ntpq	11:30:30	0
3643699	99	67	5,20	cyclictest	3757054	-21	modprobe	10:45:00	0
3643699	99	67	34,30	cyclictest	3672266	-21	df	09:00:18	0
3643699	99	67	34,30	cyclictest	3672266	-21	df	09:00:18	0
3643699	99	67	34,30	cyclictest	0	-21	swapper/0	11:10:28	0
3643699	99	67	19,14	cyclictest	3773995	-21	sh	11:05:20	0
3643701	99	66	35,28	cyclictest	0	-21	swapper/1	11:36:15	1
3643699	99	66	5,23	cyclictest	3847977	-21	ntpq	12:30:35	0
3643699	99	66	4,20	cyclictest	3736421	-21	ssh	10:20:28	0
3643699	99	66	4,20	cyclictest	3736421	-21	ssh	10:20:28	0
3643699	99	66	29,6	cyclictest	0	-21	swapper/0	11:55:21	0
3643699	99	66	27,8	cyclictest	0	-21	swapper/0	07:40:01	0
3643699	99	66	27,7	cyclictest	0	-21	swapper/0	12:35:17	0
3643701	99	65	57,5	cyclictest	3822957	-21	kworker/u4:14+events_unbound	12:16:22	1
3643701	99	65	26,35	cyclictest	0	-21	swapper/1	10:40:16	1
3643699	99	65	31,5	cyclictest	0	-21	swapper/0	09:55:31	0
3643699	99	65	30,5	cyclictest	3809159	-21	mailstats	11:45:39	0
3643699	99	65	30,5	cyclictest	3809159	-21	mailstats	11:45:38	0
3643699	99	65	30,5	cyclictest	3668121	-21	munin-plugin-st	08:45:00	0
3643699	99	65	29,33	cyclictest	3706267	-21	proc_pri	09:45:41	0
3643699	99	65	28,6	cyclictest	0	-21	swapper/0	11:00:15	0
3643701	99	64	34,27	cyclictest	3665824	-21	aten_r7power_en	08:35:20	1
3643701	99	64	33,29	cyclictest	3791063	-21	cpu	11:25:18	1
3643701	99	64	33,29	cyclictest	3705314	-21	dpkg	09:45:13	1
3643701	99	64	33,28	cyclictest	0	-21	swapper/1	12:30:27	1
3643699	99	64	4,21	cyclictest	3645027	-21	cron	07:15:00	0
3643699	99	64	33,28	cyclictest	0	-21	swapper/0	10:50:21	0
3643699	99	64	30,5	cyclictest	3685711	-21	kworker/u4:6-rpciod	09:25:31	0
3643699	99	64	25,8	cyclictest	0	-21	swapper/0	11:20:39	0
3643701	99	63	32,29	cyclictest	3722963	-21	fschecks_count	10:05:18	1
3643701	99	63	3,14	cyclictest	3744339	-21	apt-get	10:30:16	1
3643699	99	63	29,4	cyclictest	0	-21	swapper/0	12:00:22	0
3643699	99	63	27,6	cyclictest	0	-21	swapper/0	07:45:39	0
3643701	99	62	52,7	cyclictest	3792815	-21	kworker/u4:13+events_unbound	11:35:00	1
3643699	99	62	54,6	cyclictest	3685711	-21	kworker/u4:6+events_unbound	09:25:00	0
3643699	99	62	54,6	cyclictest	3664207	-21	kworker/u4:10+events_unbound	08:55:01	0
3643699	99	62	32,27	cyclictest	3660408	-21	kworker/u4:3-rpciod	08:15:19	0
3643699	99	62	3,13	cyclictest	3749563	-21	/usr/sbin/munin	10:35:35	0
3643699	99	62	28,5	cyclictest	0	-21	swapper/0	09:35:28	0
3643701	99	61	4,8	cyclictest	3652142	-21	ntpq	07:40:29	1
3643701	99	61	27,30	cyclictest	0	-21	swapper/1	12:05:20	1
3643701	99	61	2,12	cyclictest	3838414	-21	apt-get	12:20:16	1
3643699	99	61	43,13	cyclictest	54	-21	kswapd0	10:45:08	0
3643701	99	60	53,5	cyclictest	3657812	-21	kworker/u4:1+events_unbound	08:10:02	1
3643701	99	60	4,10	cyclictest	3736289	-21	ssh	10:20:23	1
3643701	99	60	4,10	cyclictest	3736289	-21	ssh	10:20:22	1
3643701	99	60	31,26	cyclictest	0	-21	swapper/1	12:35:16	1
3643701	99	60	29,28	cyclictest	0	-21	swapper/1	10:10:39	1
3643701	99	60	28,29	cyclictest	0	-21	swapper/1	09:35:37	1
3643701	99	60	27,30	cyclictest	0	-21	swapper/1	09:00:21	1
3643701	99	60	27,30	cyclictest	0	-21	swapper/1	09:00:21	1
3643699	99	60	30,27	cyclictest	0	-21	swapper/0	09:05:27	0
3643701	99	59	3,16	cyclictest	3769361	-21	ssh	11:00:14	1
3643701	99	59	29,27	cyclictest	0	-21	swapper/1	10:25:34	1
3643701	99	59	2,12	cyclictest	3679883	-21	ntpq	09:15:29	1
3643699	99	59	26,7	cyclictest	0	-21	swapper/0	09:53:20	0
3643701	99	58	28,28	cyclictest	3688204	-21	sh	09:25:19	1
3643701	99	58	26,29	cyclictest	0	-21	swapper/1	10:15:19	1
3643701	99	58	22,33	cyclictest	0	-21	swapper/1	07:20:29	1
3643701	99	57	36,19	cyclictest	3643990	-21	aten_r7power_cu	07:10:22	1
3643701	99	57	32,22	cyclictest	3660508	-21	latency_hist	08:15:01	1
3643701	99	57	26,28	cyclictest	0	-21	swapper/1	11:50:29	1
3643701	99	57	25,29	cyclictest	3715145	-21	unixbench-2d	09:55:39	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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