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 May 14, 2026 00:44:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3536360	99	107	94,6	cyclictest	3531437	-21	kworker/u4:3+events_unbound	19:56:59	1
3536360	99	91	84,5	cyclictest	3542788	-21	kworker/u4:13+events_unbound	20:47:07	1
3536360	99	90	83,5	cyclictest	3719444	-21	kworker/u4:1+events_unbound	00:23:48	1
3536360	99	86	80,4	cyclictest	3553110	-21	kworker/u4:14+events_unbound	20:17:02	1
3536359	99	81	30,45	cyclictest	3638997	-21	cat	22:30:22	0
3536359	99	80	35,39	cyclictest	256	50	irq/23-42890000.ethernet	23:40:00	0
3536359	99	77	34,20	cyclictest	53	-21	kswapd0	00:25:09	0
3536359	99	76	55,15	cyclictest	3556957	-21	kworker/u4:2+events_unbound	20:40:01	0
3536359	99	75	65,7	cyclictest	3540242	-21	kworker/u4:4+events_unbound	19:25:01	0
3536359	99	75	3,31	cyclictest	3703671	-21	apt-get	23:45:09	0
3536360	99	74	67,5	cyclictest	3535080	-21	kworker/u4:12+events_unbound	19:30:01	1
3536359	99	73	33,34	cyclictest	248	50	irq/20-imx-lcdifv3-crtc.0	22:15:01	0
3536360	99	72	60,9	cyclictest	3567298	-21	diskmemload	00:01:39	1
3536359	99	71	64,5	cyclictest	3541513	-21	kworker/u4:5+events_unbound	19:45:00	0
3536359	99	71	37,30	cyclictest	3630870	-21	unixbench_multi	22:20:39	0
3536359	99	71	28,5	cyclictest	3722006	-21	nfs4_client	00:05:22	0
3536359	99	70	62,6	cyclictest	3554380	-21	kworker/u4:15+events_unbound	20:17:01	0
3536359	99	70	27,39	cyclictest	0	-21	swapper/0	21:10:16	0
3536359	99	69	37,30	cyclictest	3726208	-21	gltestperf	00:10:20	0
3536359	99	69	37,30	cyclictest	3726208	-21	gltestperf	00:10:19	0
3536359	99	69	36,30	cyclictest	3540765	-21	fschecks_time	19:25:18	0
3536359	99	69	35,31	cyclictest	3549587	-21	aten_r7power_po	20:00:17	0
3536359	99	69	34,30	cyclictest	0	-21	swapper/0	21:40:17	0
3536359	99	69	23,6	cyclictest	0	-21	swapper/0	20:55:37	0
3536359	99	69	23,6	cyclictest	0	-21	swapper/0	20:55:36	0
3536359	99	69	19,47	cyclictest	3713359	-21	gcc	23:55:27	0
3536359	99	69	19,44	cyclictest	0	-21	swapper/0	00:20:36	0
3536359	99	68	36,29	cyclictest	3730539	-21	gltestperf	00:15:19	0
3536359	99	68	32,33	cyclictest	3554912	-21	fschecks_time	20:20:18	0
3536359	99	68	28,37	cyclictest	3550759	-21	acpi	20:05:11	0
3536359	99	68	28,36	cyclictest	0	-21	swapper/0	19:45:33	0
3536359	99	67	35,29	cyclictest	3708683	-21	fschecks_time	23:50:20	0
3536359	99	67	32,32	cyclictest	3572438	-21	fschecks_time	21:15:22	0
3536359	99	67	31,32	cyclictest	3662514	-21	kworker/u4:6-nfsiod	23:10:28	0
3536359	99	67	28,34	cyclictest	0	-21	swapper/0	22:50:33	0
3536359	99	67	23,6	cyclictest	0	-21	swapper/0	22:45:37	0
3536359	99	66	35,29	cyclictest	3648547	-21	wc	22:40:50	0
3536359	99	66	35,27	cyclictest	0	-21	swapper/0	23:01:18	0
3536359	99	66	30,33	cyclictest	3670134	-21	tr	23:05:38	0
3536359	99	66	30,32	cyclictest	0	-21	swapper/0	23:30:22	0
3536359	99	66	27,35	cyclictest	0	-21	swapper/0	00:35:38	0
3536360	99	65	51,6	cyclictest	3558227	-21	kworker/u4:7+events_unbound	20:40:03	1
3536359	99	65	29,32	cyclictest	0	-21	swapper/0	20:30:38	0
3536359	99	65	26,36	cyclictest	3610137	-21	kworker/u4:0-rpciod	22:35:25	0
3536360	99	64	40,17	cyclictest	0	-21	swapper/1	20:35:07	1
3536359	99	64	56,5	cyclictest	3544057	-21	kworker/u4:0+events_unbound	20:27:03	0
3536359	99	64	38,23	cyclictest	3536357	-21	cyclictest	22:55:33	0
3536359	99	64	3,25	cyclictest	3567298	-21	diskmemload	21:56:07	0
3536359	99	64	3,19	cyclictest	3716991	-21	/usr/sbin/munin	00:00:34	0
3536359	99	64	29,32	cyclictest	3536357	-21	cyclictest	23:41:44	0
3536359	99	64	29,32	cyclictest	3536357	-21	cyclictest	23:41:44	0
3536359	99	64	27,5	cyclictest	0	-21	swapper/0	22:05:26	0
3536359	99	64	27,34	cyclictest	0	-21	swapper/0	21:05:16	0
3536359	99	64	27,33	cyclictest	0	-21	swapper/0	21:50:05	0
3536359	99	64	27,32	cyclictest	0	-21	swapper/0	21:50:20	0
3536359	99	64	27,32	cyclictest	0	-21	swapper/0	20:10:14	0
3536359	99	64	26,34	cyclictest	0	-21	swapper/0	23:25:16	0
3536359	99	64	26,34	cyclictest	0	-21	swapper/0	23:25:15	0
3536359	99	64	20,6	cyclictest	3562189	-21	munin-run	20:49:59	0
3536359	99	64	20,5	cyclictest	0	-21	swapper/0	22:15:40	0
3536359	99	64	18,11	cyclictest	483	-21	weston-desktop-	23:21:59	0
3536359	99	63	4,16	cyclictest	3537601	-21	modprobe	19:14:59	0
3536359	99	63	27,33	cyclictest	3590841	-21	switchtime	21:35:36	0
3536360	99	62	55,5	cyclictest	3723840	-21	kworker/u4:7+events_unbound	00:15:01	1
3536360	99	62	48,9	cyclictest	37	-21	kcompactd0	23:24:24	1
3536359	99	62	4,19	cyclictest	3747250	-21	idleruntime-cro	00:35:01	0
3536359	99	62	18,11	cyclictest	256	50	irq/23-42890000.ethernet	22:00:28	0
3536360	99	61	45,9	cyclictest	3723839	-21	kworker/u4:3-rpciod	00:10:52	1
3536360	99	61	45,9	cyclictest	3723839	-21	kworker/u4:3-rpciod	00:10:52	1
3536359	99	61	31,26	cyclictest	0	-21	swapper/0	21:25:19	0
3536359	99	61	25,5	cyclictest	0	-21	swapper/0	19:50:32	0
3536359	99	61	24,5	cyclictest	0	-21	swapper/0	23:15:19	0
3536359	99	60	22,4	cyclictest	0	-21	swapper/0	19:55:27	0
3536359	99	60	14,42	cyclictest	0	-21	swapper/0	22:30:00	0
3536359	99	60	14,42	cyclictest	0	-21	swapper/0	22:29:59	0
3536360	99	59	5,41	cyclictest	3603112	-21	ssh	21:50:15	1
3536359	99	59	25,31	cyclictest	0	-21	swapper/0	21:20:20	0
3536360	99	58	44,6	cyclictest	3544063	-21	kworker/u4:8+events_unbound	19:40:41	1
3536359	99	58	23,5	cyclictest	3589575	-21	munin-plugin-st	21:35:05	0
3536360	99	56	46,7	cyclictest	0	-21	swapper/1	22:30:29	1
3536360	99	55	45,8	cyclictest	3706105	-21	systemd	23:46:58	1
3536360	99	55	40,6	cyclictest	3583120	-21	kworker/u4:4+events_unbound	21:30:02	1
3536359	99	55	21,6	cyclictest	3560077	-21	fschecks_count	20:40:19	0
3536360	99	54	40,6	cyclictest	3551833	-21	kworker/u4:4+events_unbound	21:00:02	1
3536360	99	53	46,5	cyclictest	3567255	-21	kworker/u4:18+events_unbound	21:09:02	1
3536360	99	53	46,5	cyclictest	1062	-21	lldpd	22:39:59	1
3536360	99	53	43,8	cyclictest	3656105	-21	aten_r7power_en	22:50:15	1
3536360	99	52	45,5	cyclictest	3556958	-21	kworker/u4:3+events_unbound	20:51:58	1
3536360	99	52	45,5	cyclictest	3531437	-21	kworker/u4:3+events_unbound	20:00:02	1
3536360	99	51	45,5	cyclictest	3662514	-21	kworker/u4:6+events_unbound	23:33:01	1
3536360	99	51	40,8	cyclictest	3621964	-21	timerwakeupswit	22:10:39	1
3536360	99	51	38,10	cyclictest	3648575	-21	timerwakeupswit	22:40:50	1
3536360	99	50	44,5	cyclictest	3662516	-21	kworker/u4:9+events_unbound	23:01:58	1
3536360	99	50	44,5	cyclictest	3640229	-21	kworker/u4:3+events_unbound	22:57:00	1
3536360	99	50	43,5	cyclictest	3740936	-21	kworker/u4:14+events_unbound	00:35:59	1
3536360	99	50	43,5	cyclictest	3680234	-21	kworker/u4:10+events_unbound	23:36:43	1
3536360	99	50	42,5	cyclictest	3651814	-21	aten_r7power_en	22:45:21	1
3536360	99	50	36,6	cyclictest	3680235	-21	kworker/u4:12+events_unbound	23:28:42	1
3536360	99	50	36,6	cyclictest	3680235	-21	kworker/u4:12+events_unbound	23:28:41	1
3536360	99	50	34,7	cyclictest	3605647	-21	kworker/u4:7+events_unbound	22:21:42	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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