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 Jul 20, 2026 12:44:08)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
647724	99	106	91,6	cyclictest	837141	-21	kworker/u4:9+events_unbound	12:31:01	1
647724	99	101	94,5	cyclictest	651529	-21	kworker/u4:5+events_unbound	07:55:02	1
647724	99	98	91,5	cyclictest	659179	-21	kworker/u4:0+events_unbound	08:30:20	1
647724	99	94	82,5	cyclictest	651526	-21	kworker/u4:1+events_unbound	08:00:07	1
647723	99	92	83,7	cyclictest	53	-21	kswapd0	09:40:34	0
647724	99	71	65,4	cyclictest	770694	-21	kworker/u4:12+events_unbound	11:10:02	1
647723	99	66	56,8	cyclictest	846197	-21	kworker/u4:6+events_unbound	12:20:56	0
647723	99	66	54,11	cyclictest	53	-21	kswapd0	12:05:09	0
647724	99	63	48,6	cyclictest	846196	-21	kworker/u4:3+events_unbound	12:25:03	1
647724	99	63	47,7	cyclictest	748112	-21	kworker/u4:2+events_unbound	10:29:45	1
647723	99	63	14,10	cyclictest	760158	-21	ntpq	10:40:34	0
647724	99	62	52,7	cyclictest	0	-21	swapper/1	11:50:13	1
647723	99	61	28,7	cyclictest	0	-21	swapper/0	09:25:29	0
647723	99	61	16,31	cyclictest	696770	-21	acpi	09:30:11	0
647723	99	60	48,10	cyclictest	53	-21	kswapd0	09:45:09	0
647724	99	59	52,5	cyclictest	712629	-21	kworker/u4:6+events_unbound	10:20:03	1
647723	99	59	50,5	cyclictest	0	-21	swapper/0	11:30:02	0
647724	99	58	49,7	cyclictest	766187	-21	kworker/u4:6+events_unbound	11:15:47	1
647724	99	58	47,8	cyclictest	0	-21	swapper/1	09:45:32	1
647723	99	58	51,5	cyclictest	764805	-21	mailstats	10:45:39	0
647723	99	58	50,6	cyclictest	821270	-21	latency_hist	11:50:02	0
647724	99	57	50,5	cyclictest	766187	-21	kworker/u4:6+events_unbound	10:49:45	1
647724	99	57	49,5	cyclictest	796515	-21	kworker/u4:11+events_unbound	11:25:48	1
647724	99	56	46,8	cyclictest	837141	-21	kworker/u4:9-rpciod	12:10:41	1
647724	99	56	45,4	cyclictest	647652	-21	kworker/u4:3+events_unbound	08:05:01	1
647723	99	56	49,5	cyclictest	426529	-21	kworker/u4:6+events_unbound	07:49:59	0
647723	99	56	10,31	cyclictest	769256	-21	mailstats	10:50:39	0
647723	99	55	48,5	cyclictest	53	-21	kswapd0	12:00:35	0
647723	99	55	45,8	cyclictest	751385	-21	systemd	10:30:38	0
647723	99	55	35,12	cyclictest	0	-21	swapper/0	08:15:01	0
647723	99	55	34,17	cyclictest	808136	-21	apt-get	11:35:13	0
647723	99	55	17,13	cyclictest	725840	-21	ssh	10:01:47	0
647723	99	55	12,20	cyclictest	655384	-21	idleruntime-cro	07:40:01	0
647724	99	54	47,5	cyclictest	648949	-21	kworker/u4:8+events_unbound	08:41:45	1
647724	99	54	40,7	cyclictest	655339	-21	kworker/u4:16+events_unbound	08:18:50	1
647723	99	54	9,19	cyclictest	813510	-21	ntpq	11:40:38	0
647723	99	54	32,7	cyclictest	0	-21	swapper/0	09:40:02	0
647723	99	54	31,19	cyclictest	659377	-21	apt-get	07:55:12	0
647723	99	54	20,11	cyclictest	737802	-21	ntpq	10:15:26	0
647723	99	54	17,13	cyclictest	665863	-21	apt-get	08:20:13	0
647723	99	54	16,13	cyclictest	649697	-21	ntpq	07:15:26	0
647723	99	54	16,11	cyclictest	791156	-21	ntpq	11:15:31	0
647723	99	54	15,15	cyclictest	846401	-21	ssh	12:17:40	0
647723	99	54	15,14	cyclictest	828677	-21	ssh	11:57:49	0
647723	99	54	15,14	cyclictest	732288	-21	ssh	10:09:55	0
647723	99	54	15,11	cyclictest	664564	-21	wget	08:15:17	0
647723	99	54	14,14	cyclictest	840062	-21	ntpq	12:10:29	0
647723	99	54	13,26	cyclictest	715743	-21	ssh	09:50:35	0
647724	99	53	47,4	cyclictest	670754	-21	kworker/u4:12+events_unbound	08:50:04	1
647724	99	53	45,6	cyclictest	849216	-21	find	12:20:37	1
647724	99	53	43,7	cyclictest	834874	-21	sh	12:05:11	1
647723	99	53	9,20	cyclictest	857752	-21	ssh	12:30:25	0
647723	99	53	45,5	cyclictest	0	-21	swapper/0	10:55:19	0
647723	99	53	32,12	cyclictest	256	50	irq/23-42890000.ethernet	11:20:10	0
647723	99	53	16,15	cyclictest	652179	-21	if_eth0	07:25:18	0
647723	99	53	15,12	cyclictest	684197	-21	ntpq	09:15:36	0
647723	99	53	15,12	cyclictest	662596	-21	ntp_states	08:05:33	0
647723	99	53	15,10	cyclictest	722320	-21	ssh	09:58:16	0
647723	99	53	10,21	cyclictest	0	-21	swapper/0	12:25:24	0
647724	99	52	44,6	cyclictest	751439	-21	mailstats	10:30:37	1
647724	99	52	44,6	cyclictest	676622	-21	systemd	09:00:26	1
647723	99	52	34,14	cyclictest	661370	-21	ps	08:00:36	0
647723	99	52	17,11	cyclictest	805750	-21	ssh	11:31:45	0
647723	99	52	16,12	cyclictest	862084	-21	/usr/sbin/munin	12:35:21	0
647723	99	52	16,12	cyclictest	783888	-21	ssh	11:07:14	0
647723	99	52	15,10	cyclictest	650682	-21	diskstats	07:20:18	0
647723	99	52	13,17	cyclictest	777912	-21	ntpq	11:00:31	0
647723	99	52	13,16	cyclictest	744890	-21	ssh	10:23:45	0
647723	99	52	13,15	cyclictest	674313	-21	mailstats	08:50:36	0
647723	99	52	10,23	cyclictest	747246	-21	grep	10:25:43	0
647723	99	52	10,20	cyclictest	0	-21	swapper/0	10:10:17	0
647723	99	52	10,19	cyclictest	822734	-21	ssh	11:50:41	0
647724	99	51	45,5	cyclictest	859750	-21	kworker/u4:16+events_unbound	12:37:45	1
647724	99	51	44,5	cyclictest	657944	-21	munin-plugin-st	07:50:00	1
647723	99	51	33,13	cyclictest	786656	-21	ntpq	11:10:27	0
647723	99	51	17,12	cyclictest	656501	-21	grep	07:40:39	0
647723	99	51	15,19	cyclictest	0	-21	swapper/0	10:35:34	0
647723	99	51	14,16	cyclictest	688765	-21	ntpq	09:20:42	0
647723	99	51	14,16	cyclictest	688765	-21	ntpq	09:20:42	0
647723	99	51	13,14	cyclictest	648539	-21	ntpq	07:10:34	0
647723	99	51	11,16	cyclictest	679600	-21	ntpq	09:10:32	0
647723	99	51	11,16	cyclictest	679600	-21	ntpq	09:10:32	0
647723	99	51	11,10	cyclictest	658335	-21	diskstats	07:50:19	0
647723	99	51	10,18	cyclictest	0	-21	swapper/0	09:05:37	0
647724	99	50	43,5	cyclictest	813035	-21	fschecks_time	11:40:25	1
647724	99	50	43,5	cyclictest	651529	-21	kworker/u4:5+events_unbound	07:35:17	1
647724	99	50	43,5	cyclictest	633852	-21	kworker/u4:12+events_unbound	07:17:02	1
647724	99	50	41,6	cyclictest	687903	-21	aten2__	09:20:17	1
647724	99	50	41,6	cyclictest	687903	-21	aten2__	09:20:17	1
647723	99	50	25,22	cyclictest	675402	-21	ntpq	08:55:30	0
647723	99	50	13,13	cyclictest	668544	-21	wget	08:30:15	0
647724	99	49	4,34	cyclictest	697759	-21	ssh	09:30:37	1
647724	99	49	42,5	cyclictest	721669	-21	kworker/u4:0+events_unbound	10:09:45	1
647724	99	49	42,5	cyclictest	716056	-21	unixbench-2d	09:50:39	1
647724	99	49	40,6	cyclictest	810626	-21	kworker/u4:2+rpciod	12:00:21	1
647723	99	49	15,9	cyclictest	670221	-21	ntpq	08:35:24	0
647723	99	49	15,26	cyclictest	676899	-21	ls	09:00:40	0
647723	99	49	13,13	cyclictest	667492	-21	perl	08:25:20	0
647723	99	49	13,10	cyclictest	673350	-21	munin-run	08:50:00	0
647723	99	49	13,10	cyclictest	653643	-21	ntpq	07:30:31	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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