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 all highest latencies:

System rack7slot2.osadl.org (updated Tue Aug 18, 2026 00:44:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
643935	99	111	73,25	cyclictest	53	-21	kswapd0	23:45:20	0
643937	99	110	104,4	cyclictest	830711	-21	kworker/u4:9+events_unbound	00:12:46	1
643935	99	110	49,44	cyclictest	663158	-21	kworker/u4:2-xprtiod	20:50:11	0
643935	99	88	1,39	cyclictest	643934	-21	modprobe	19:10:00	0
643937	99	84	78,4	cyclictest	826201	-21	kworker/u4:2+events_unbound	23:57:45	1
643937	99	83	76,5	cyclictest	713668	-21	kworker/u4:4+events_unbound	22:02:26	1
643935	99	81	74,5	cyclictest	749697	-21	kworker/u4:8+events_unbound	22:32:30	0
643937	99	76	68,5	cyclictest	826202	-21	kworker/u4:3+events_unbound	00:07:45	1
643937	99	75	67,6	cyclictest	751824	-21	apt-get	22:35:12	1
643937	99	75	67,6	cyclictest	751824	-21	apt-get	22:35:12	1
643935	99	75	66,6	cyclictest	835200	-21	kworker/u4:12+events_unbound	00:37:51	0
643935	99	75	66,6	cyclictest	758874	-21	kworker/u4:13+events_unbound	22:42:32	0
643935	99	73	33,38	cyclictest	823649	-21	munin-run	23:55:00	0
643935	99	73	33,38	cyclictest	823649	-21	munin-run	23:55:00	0
643937	99	72	66,4	cyclictest	826200	-21	kworker/u4:1+events_unbound	00:22:48	1
643937	99	72	64,6	cyclictest	718222	-21	kworker/u4:8+events_unbound	21:57:25	1
643935	99	72	29,4	cyclictest	0	-21	swapper/0	22:00:33	0
643937	99	71	63,6	cyclictest	844163	-21	kworker/u4:4+events_unbound	00:17:47	1
643937	99	71	57,10	cyclictest	53	-21	kswapd0	23:35:00	1
643937	99	70	64,4	cyclictest	674730	-21	kworker/u4:13+events_unbound	21:17:18	1
643935	99	70	35,31	cyclictest	850855	-21	fschecks_time	00:25:23	0
643935	99	70	32,34	cyclictest	0	-21	swapper/0	20:20:29	0
643935	99	69	3,19	cyclictest	689377	-21	ssh	21:25:28	0
643935	99	68	34,32	cyclictest	707224	-21	grep	21:45:21	0
643935	99	68	33,32	cyclictest	0	-21	swapper/0	00:10:20	0
643935	99	67	34,31	cyclictest	760996	-21	aten_r7power_en	22:45:17	0
643935	99	67	32,32	cyclictest	0	-21	swapper/0	19:35:35	0
643935	99	67	31,33	cyclictest	0	-21	swapper/0	23:15:27	0
643935	99	67	31,33	cyclictest	0	-21	swapper/0	21:20:19	0
643935	99	67	30,33	cyclictest	0	-21	swapper/0	21:15:33	0
643935	99	66	32,30	cyclictest	735917	-21	kworker/u4:0-rpciod	22:20:43	0
643935	99	66	29,34	cyclictest	658231	-21	acpi	20:05:11	0
643935	99	66	28,4	cyclictest	0	-21	swapper/0	23:00:32	0
643935	99	65	5,23	cyclictest	799264	-21	ssh	23:27:00	0
643935	99	65	34,29	cyclictest	648635	-21	grep	19:25:37	0
643935	99	65	32,30	cyclictest	0	-21	swapper/0	21:10:27	0
643937	99	64	56,6	cyclictest	690698	-21	kworker/u4:7+events_unbound	21:40:02	1
643937	99	64	56,6	cyclictest	690698	-21	kworker/u4:7+events_unbound	21:40:02	1
643937	99	64	47,11	cyclictest	769975	-21	wget	22:55:15	1
643935	99	64	54,6	cyclictest	0	-21	swapper/0	22:05:33	0
643935	99	64	44,11	cyclictest	0	-21	swapper/0	19:55:07	0
643935	99	64	34,28	cyclictest	729905	-21	kernelversion	22:10:21	0
643935	99	64	32,30	cyclictest	826200	-21	kworker/u4:1-rpciod	00:05:29	0
643935	99	64	30,5	cyclictest	0	-21	swapper/0	23:05:16	0
643935	99	63	34,27	cyclictest	842632	-21	mailstats	00:15:39	0
643935	99	63	32,28	cyclictest	0	-21	swapper/0	21:55:44	0
643935	99	63	29,6	cyclictest	0	-21	swapper/0	22:50:31	0
643935	99	63	29,5	cyclictest	0	-21	swapper/0	23:55:20	0
643935	99	63	29,4	cyclictest	722848	-21	kworker/u4:14-rpciod	22:15:34	0
643935	99	63	26,6	cyclictest	0	-21	swapper/0	21:30:38	0
643935	99	62	6,17	cyclictest	711313	-21	aten_r7power_cu	21:50:15	0
643935	99	62	33,27	cyclictest	742960	-21	aten_r7power_en	22:25:17	0
643935	99	62	30,30	cyclictest	703434	-21	timerandwakeup	21:40:43	0
643935	99	62	30,30	cyclictest	703434	-21	timerandwakeup	21:40:43	0
643935	99	62	28,6	cyclictest	0	-21	swapper/0	00:00:16	0
643935	99	62	28,5	cyclictest	669572	-21	idleruntime-cro	20:50:00	0
643935	99	62	28,3	cyclictest	0	-21	swapper/0	23:40:19	0
643935	99	62	27,33	cyclictest	663160	-21	kworker/u4:7-rpciod	20:55:17	0
643935	99	62	26,7	cyclictest	751907	-21	aten_r7power_cu	22:35:16	0
643935	99	62	26,7	cyclictest	751907	-21	aten_r7power_cu	22:35:16	0
643935	99	62	26,6	cyclictest	0	-21	swapper/0	21:40:01	0
643935	99	62	20,10	cyclictest	783877	-21	fschecks_count	23:10:22	0
643935	99	62	1,13	cyclictest	859003	-21	latency_hist	00:35:01	0
643937	99	61	53,6	cyclictest	640217	-21	kworker/u4:2+events_unbound	20:15:02	1
643935	99	61	28,5	cyclictest	846880	-21	ld	00:20:35	0
643935	99	61	27,8	cyclictest	796810	-21	latency_hist	23:25:01	0
643937	99	60	53,5	cyclictest	790372	-21	kworker/u4:7+events_unbound	23:47:41	1
643937	99	60	52,6	cyclictest	844162	-21	kworker/u4:2+events_unbound	00:35:02	1
643937	99	59	51,6	cyclictest	623379	-21	kworker/u4:9+events_unbound	19:17:04	1
643935	99	59	26,6	cyclictest	0	-21	swapper/0	20:15:25	0
643937	99	58	51,6	cyclictest	821710	-21	kworker/u4:8+events_unbound	23:52:42	1
643937	99	58	51,6	cyclictest	821710	-21	kworker/u4:8+events_unbound	23:52:42	1
643937	99	58	45,9	cyclictest	676040	-21	sendmail_mailqu	21:10:35	1
643937	99	58	45,6	cyclictest	674729	-21	kworker/u4:4+events_unbound	21:37:21	1
643935	99	58	26,5	cyclictest	0	-21	swapper/0	20:25:26	0
643937	99	57	49,6	cyclictest	640217	-21	kworker/u4:2+events_unbound	19:22:04	1
643937	99	57	48,7	cyclictest	628667	-21	kworker/u4:6+events_unbound	20:25:00	1
643935	99	57	27,5	cyclictest	0	-21	swapper/0	23:35:33	0
643935	99	57	27,5	cyclictest	0	-21	swapper/0	23:35:33	0
643937	99	55	42,9	cyclictest	658932	-21	ps	20:05:35	1
643937	99	54	47,5	cyclictest	641425	-21	kworker/u4:7+events_unbound	19:30:01	1
643937	99	53	46,5	cyclictest	790372	-21	kworker/u4:7+events_unbound	23:44:45	1
643937	99	53	46,5	cyclictest	688383	-21	basename	21:25:00	1
643937	99	53	46,5	cyclictest	664429	-21	kworker/u4:9+events_unbound	20:35:02	1
643937	99	53	45,6	cyclictest	790370	-21	kworker/u4:3+events_unbound	23:40:00	1
643937	99	53	45,6	cyclictest	790370	-21	kworker/u4:3+events_unbound	23:40:00	1
643935	99	52	45,5	cyclictest	735917	-21	kworker/u4:0+events_unbound	23:00:02	0
643937	99	51	44,5	cyclictest	744155	-21	unixbench_singl	22:25:42	1
643937	99	51	37,6	cyclictest	663159	-21	kworker/u4:4+events_unbound	20:37:12	1
643937	99	51	34,11	cyclictest	0	-21	swapper/1	23:20:34	1
643937	99	51	31,9	cyclictest	788701	-21	ntpq	23:15:25	1
643937	99	50	43,5	cyclictest	856064	-21	/usr/sbin/munin	00:30:40	1
643937	99	50	43,5	cyclictest	852477	-21	kworker/u4:8+events_unbound	00:29:45	1
643937	99	50	43,5	cyclictest	828879	-21	gltestperf	00:00:21	1
643937	99	49	38,7	cyclictest	758874	-21	kworker/u4:13-xprtiod	22:50:21	1
643937	99	49	36,10	cyclictest	674764	-21	diskmemload	21:31:50	1
643937	99	48	42,4	cyclictest	729342	-21	aten2__	22:10:14	1
643937	99	48	40,6	cyclictest	774606	-21	aten_r7power_en	23:00:17	1
643937	99	48	39,6	cyclictest	655866	-21	df_abs	19:55:21	1
643935	99	48	41,5	cyclictest	658072	-21	idleruntime-cro	20:05:00	0
643937	99	47	40,5	cyclictest	713668	-21	kworker/u4:4+events_unbound	22:05:46	1
643937	99	47	35,9	cyclictest	699852	-21	kworker/u4:0-nfsiod	21:45:28	1
643935	99	47	5,37	cyclictest	654135	-21	modprobe	19:50:00	0
643935	99	47	40,5	cyclictest	665402	-21	cat	20:30:37	0
643935	99	47	38,7	cyclictest	802017	-21	gltestperf	23:30:21	0
643937	99	46	39,5	cyclictest	734516	-21	diskmemload	22:15:27	1
643937	99	46	38,6	cyclictest	689410	-21	ssh	21:25:29	1
643937	99	46	37,7	cyclictest	756505	-21	aten_r7power_en	22:40:17	1
643935	99	46	39,5	cyclictest	666145	-21	fschecks_count	20:35:18	0
643935	99	46	26,18	cyclictest	645599	-21	fschecks_count	19:15:19	0
643937	99	45	4,24	cyclictest	739053	-21	ssh	22:20:28	1
643937	99	45	39,4	cyclictest	644431	-21	fschecks_time	19:10:20	1
643937	99	45	38,5	cyclictest	643933	-21	cyclictest	22:30:34	1
643937	99	45	35,7	cyclictest	0	-21	swapper/1	23:07:45	1
643937	99	44	38,4	cyclictest	711687	-21	gltestperf	21:50:19	1
643937	99	44	37,5	cyclictest	794979	-21	kworker/u4:12-rpciod	23:25:31	1
643937	99	44	33,8	cyclictest	37	-21	kcompactd0	23:13:55	1
643935	99	44	35,7	cyclictest	659892	-21	gltestperf	20:10:23	0
643937	99	43	37,4	cyclictest	674818	-21	latency_hist	21:10:01	1
643937	99	43	33,8	cyclictest	655417	-21	kworker/u4:8	19:55:00	1
643937	99	43	33,7	cyclictest	735917	-21	kworker/u4:0-rpciod	22:45:42	1
643935	99	43	34,6	cyclictest	655291	-21	unixbench_multi	19:50:38	0
643937	99	42	36,4	cyclictest	669564	-21	apt	20:50:00	1
643937	99	42	33,7	cyclictest	649340	-21	aten_r7power_vo	19:30:16	1
643937	99	42	28,5	cyclictest	647741	-21	kworker/u4:3+events_unbound	19:47:05	1
643935	99	42	35,5	cyclictest	672623	-21	grep	21:00:21	0
643935	99	42	34,6	cyclictest	644378	-21	fschecks_time	19:10:20	0
643937	99	41	34,5	cyclictest	668314	-21	munin-plugin-st	20:45:06	1
643937	99	41	33,6	cyclictest	657073	-21	cut	20:00:17	1
643937	99	41	33,6	cyclictest	623379	-21	kworker/u4:9+events_unbound	19:42:07	1
643937	99	41	33,6	cyclictest	623379	-21	kworker/u4:9+events_unbound	19:42:07	1
643937	99	41	32,6	cyclictest	673479	-21	kworker/u4:3	21:05:00	1
643935	99	41	34,5	cyclictest	0	-21	swapper/0	19:30:18	0
643935	99	41	32,6	cyclictest	652058	-21	fschecks_count	19:40:19	0
643935	99	41	32,6	cyclictest	652058	-21	fschecks_count	19:40:19	0
643937	99	39	32,5	cyclictest	661802	-21	unixbench_singl	20:15:42	1
643937	99	39	31,5	cyclictest	628667	-21	kworker/u4:6-rpciod	20:25:38	1
643937	99	39	29,7	cyclictest	650471	-21	acpi	19:35:11	1
643935	99	39	30,7	cyclictest	667504	-21	fschecks_time	20:40:20	0
643937	99	38	29,6	cyclictest	0	-21	swapper/1	19:10:01	1
643935	99	38	29,6	cyclictest	647574	-21	timerwakeupswit	19:20:37	0
643935	99	38	29,6	cyclictest	0	-21	swapper/0	21:05:21	0
643937	99	37	31,4	cyclictest	0	-21	swapper/1	20:55:17	1
643937	99	37	29,6	cyclictest	640216	-21	kworker/u4:1+events_unbound	20:52:15	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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