OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #1

Click here to display the system's profile data or here to proceed to next system.

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance

Characteristics of the 100 highest latencies:

System rackbslot1.osadl.org (updated Wed Dec 03, 2025 12:45:17)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
132832	2	239	189,39	sleep1	0	-21	swapper/1	07:09:13	1
132885	2	185	161,15	sleep2	0	-21	swapper/2	07:09:54	2
132851	2	183	149,25	sleep0	0	-21	swapper/0	07:09:29	0
132864	2	182	158,14	sleep3	0	-21	swapper/3	07:09:40	3
133112	99	70	62,6	cyclictest	247561	-21	ThreadPoolForeg	09:10:30	3
133109	99	65	61,3	cyclictest	397521	-21	kworker/u8:3+events_unbound	11:45:38	1
133112	99	64	58,5	cyclictest	284225	-21	/usr/share/muni	09:35:11	3
133112	99	64	58,4	cyclictest	397750	-21	latency_hist	11:25:01	3
133112	99	62	46,14	cyclictest	361103	-21	kworker/u8:1+flush-179:0	10:55:29	3
133109	99	62	47,2	cyclictest	3125648	-13	Chrome_IOThread	07:45:02	1
133106	99	62	57,3	cyclictest	203134	-21	kworker/u8:3+flush-179:0	08:20:25	0
133112	99	61	5,55	cyclictest	299208	-21	kworker/u8:5+efi_rts_wq	10:08:58	3
133109	99	60	55,3	cyclictest	3125688	-21	Chrome_ChildIOT	07:40:31	1
133110	99	59	55,3	cyclictest	238187	-21	kworker/u8:3+events_unbound	09:00:13	2
133109	99	59	46,12	cyclictest	444374	-21	kworker/u8:2+events_unbound	12:35:18	1
133112	99	58	54,3	cyclictest	138053	-21	kworker/u8:1+flush-179:0	08:40:29	3
133112	99	58	44,12	cyclictest	170117	-21	/usr/share/muni	07:45:01	3
133109	99	57	53,3	cyclictest	86333	-21	kworker/u8:2+flush-179:0	07:30:27	1
133109	99	56	52,3	cyclictest	397521	-21	kworker/u8:3+flush-179:0	11:35:29	1
133109	99	56	52,3	cyclictest	174721	-21	kworker/u8:4+flush-179:0	08:55:28	1
133110	99	55	50,4	cyclictest	3125724	-21	ThreadPoolForeg	09:55:01	2
133110	99	55	31,23	cyclictest	174721	-21	kworker/u8:4+flush-179:0	08:05:28	2
133109	99	55	39,13	cyclictest	222069	-21	kworker/u8:3+flush-179:0	08:35:04	1
133112	99	54	48,4	cyclictest	226519	-21	ntpq	08:35:30	3
133109	99	54	4,48	cyclictest	232883	-21	snmp_wanpowerct	08:45:02	1
133106	99	54	50,3	cyclictest	299208	-21	kworker/u8:5+flush-179:0	10:00:01	0
133112	99	53	46,6	cyclictest	347443	-21	apt-get	10:35:13	3
133112	99	52	46,4	cyclictest	465254	-31	munin-html	12:26:25	3
133110	99	52	48,3	cyclictest	387696	-21	/usr/share/muni	11:15:16	2
133109	99	52	49,2	cyclictest	335511	-21	kworker/u8:3+events_unbound	11:05:09	1
133109	99	52	49,2	cyclictest	263340	-21	kworker/u8:1+events_unbound	09:40:04	1
133109	99	52	49,2	cyclictest	263340	-21	kworker/u8:1+events_unbound	09:40:03	1
133109	99	52	45,3	cyclictest	257987	-21	kworker/u8:0+events_unbound	09:25:00	1
133109	99	52	44,2	cyclictest	373780	-21	kworker/u8:0+flush-179:0	12:30:23	1
133109	99	52	42,9	cyclictest	293970	-21	kworker/u8:4+flush-179:0	10:15:16	1
133106	99	52	48,3	cyclictest	373780	-21	kworker/u8:0+events_unbound	12:15:20	0
133106	99	52	47,3	cyclictest	373780	-21	kworker/u8:0+flush-179:0	12:10:12	0
133109	99	51	47,3	cyclictest	305084	-21	/usr/share/muni	09:55:01	1
133106	99	51	46,4	cyclictest	335997	-21	/usr/share/muni	10:25:10	0
133106	99	51	1,49	cyclictest	389017	-21	apache_volume	11:15:15	0
133110	99	50	47,3	cyclictest	373780	-21	kworker/u8:0+flush-179:0	11:20:30	2
133110	99	50	0,29	cyclictest	247545	-13	VizCompositorTh	07:16:03	2
133109	99	50	47,2	cyclictest	429368	-21	kworker/u8:1+events_unbound	12:25:37	1
133109	99	50	47,2	cyclictest	373780	-21	kworker/u8:0+events_unbound	12:04:01	1
133109	99	50	47,2	cyclictest	190989	-21	kworker/u8:0+flush-179:0	08:20:01	1
133109	99	50	46,3	cyclictest	257987	-21	kworker/u8:0+flush-179:0	09:35:29	1
133109	99	50	46,3	cyclictest	257987	-21	kworker/u8:0+events_unbound	09:25:35	1
133109	99	50	45,4	cyclictest	293970	-21	kworker/u8:4+events_unbound	10:10:20	1
133109	99	50	38,12	cyclictest	361103	-21	kworker/u8:1+flush-179:0	10:59:15	1
133109	99	50	38,11	cyclictest	63011	-21	kworker/u8:3+events_unbound	07:50:10	1
133109	99	50	33,14	cyclictest	335511	-21	kworker/u8:3+flush-179:0	10:40:06	1
133106	99	50	46,3	cyclictest	76147	-21	kworker/u8:0+flush-179:0	07:10:25	0
152882	2	49	0,2	sleep1	3125721	-21	chrome	07:25:24	1
133112	99	49	41,6	cyclictest	283986	-21	latency_hist	09:35:02	3
133110	99	49	44,3	cyclictest	150877	-21	apt-get	07:25:14	2
133109	99	49	46,3	cyclictest	335509	-21	kworker/u8:1+flush-179:0	10:25:27	1
133109	99	49	46,2	cyclictest	335511	-21	kworker/u8:3+flush-179:0	10:30:08	1
133106	99	49	45,3	cyclictest	273826	-21	kworker/u8:3+flush-179:0	09:35:17	0
133112	99	48	44,3	cyclictest	63011	-21	kworker/u8:3+flush-179:0	07:30:17	3
133112	99	48	44,3	cyclictest	330711	-21	kworker/u8:0+flush-179:0	10:50:14	3
133109	99	48	46,2	cyclictest	138053	-21	kworker/u8:1+flush-179:0	07:20:27	1
133109	99	48	44,3	cyclictest	174721	-21	kworker/u8:4+flush-179:0	09:05:24	1
133109	99	48	43,4	cyclictest	138053	-21	kworker/u8:1+flush-179:0	07:37:11	1
133106	99	48	45,2	cyclictest	429368	-21	kworker/u8:1+flush-179:0	12:25:30	0
133106	99	48	44,3	cyclictest	86333	-21	kworker/u8:2+flush-179:0	07:44:16	0
133106	99	48	44,3	cyclictest	383861	-21	apt-get	11:10:13	0
133106	99	48	0,40	cyclictest	247557	-21	chrome	12:25:01	0
133112	99	47	41,5	cyclictest	465838	-21	/usr/share/muni	12:30:10	3
133112	99	47	41,3	cyclictest	86333	-21	kworker/u8:2+flush-179:0	07:25:09	3
133110	99	47	42,4	cyclictest	206664	-21	gpgv	08:20:01	2
133110	99	47	32,2	cyclictest	206520	-21	kworker/2:0+pm	08:21:39	2
133109	99	47	45,1	cyclictest	335511	-21	kworker/u8:3+flush-179:0	10:45:17	1
133109	99	47	44,2	cyclictest	403181	-21	kworker/u8:4+flush-179:0	11:30:22	1
133109	99	47	4,42	cyclictest	299208	-21	kworker/u8:5+efi_rts_wq	10:08:56	1
133109	99	47	43,3	cyclictest	293970	-21	kworker/u8:4+flush-179:0	10:00:26	1
133106	99	47	1,45	cyclictest	247545	-13	VizCompositorTh	08:00:15	0
133112	99	46	41,3	cyclictest	361103	-21	kworker/u8:1+flush-179:0	11:30:07	3
133110	99	46	42,3	cyclictest	373780	-21	kworker/u8:0+flush-179:0	12:00:10	2
133110	99	46	40,5	cyclictest	425760	-21	apt-get	11:50:13	2
133109	99	46	43,2	cyclictest	263340	-21	kworker/u8:1+events_unbound	09:15:10	1
133109	99	46	42,3	cyclictest	373780	-21	kworker/u8:0+flush-179:0	11:25:09	1
133109	99	46	42,3	cyclictest	273826	-21	kworker/u8:3+events_unbound	09:45:12	1
133106	99	46	42,3	cyclictest	257987	-21	kworker/u8:0+flush-179:0	09:15:18	0
133106	99	46	0,45	cyclictest	3125627	-21	ChromeDriver	00:55:19	0
133112	99	45	42,2	cyclictest	429368	-21	kworker/u8:1+flush-179:0	11:55:06	3
133110	99	45	19,25	cyclictest	3125721	-21	chrome	09:30:06	2
133109	99	45	42,3	cyclictest	373780	-21	kworker/u8:0+flush-179:0	12:19:52	1
133109	99	45	42,2	cyclictest	174721	-21	kworker/u8:4+events_unbound	08:10:38	1
133109	99	45	41,3	cyclictest	424015	-21	kworker/u8:4+events_unbound	11:55:16	1
133109	99	45	41,3	cyclictest	174721	-21	kworker/u8:4+events_unbound	08:00:30	1
133109	99	45	35,10	cyclictest	424015	-21	kworker/u8:4+flush-179:0	12:10:19	1
133109	99	45	32,12	cyclictest	335511	-21	kworker/u8:3+events_unbound	10:24:40	1
133106	99	45	42,2	cyclictest	63011	-21	kworker/u8:3+flush-179:0	07:45:06	0
133106	99	45	41,3	cyclictest	299208	-21	kworker/u8:5+events_unbound	10:01:30	0
133110	99	44	41,2	cyclictest	86333	-21	kworker/u8:2+flush-179:0	07:33:24	2
133110	99	44	41,2	cyclictest	444374	-21	kworker/u8:2+flush-179:0	12:35:19	2
133110	99	44	40,3	cyclictest	299208	-21	kworker/u8:5+flush-179:0	10:15:04	2
133110	99	44	38,5	cyclictest	3125725	-21	ThreadPoolForeg	10:32:00	2
133109	99	44	41,2	cyclictest	444374	-21	kworker/u8:2+flush-179:0	12:20:22	1
133109	99	44	39,4	cyclictest	3125725	-21	ThreadPoolForeg	07:15:45	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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