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 792 highest latencies:

System rack7slot2.osadl.org (updated Sun Feb 08, 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
3592940	99	126	118,6	cyclictest	3630571	-21	kworker/u4:0+events_unbound	09:24:44	0
3592940	99	117	106,7	cyclictest	54	-21	kswapd0	11:40:19	0
3592941	99	109	102,5	cyclictest	3584145	-21	kworker/u4:9+events_unbound	08:34:34	1
3592941	99	103	93,7	cyclictest	3744146	-21	kworker/u4:16+events_unbound	11:45:21	1
3592940	99	90	82,6	cyclictest	3744146	-21	kworker/u4:16+events_unbound	11:50:21	0
3592941	99	89	66,7	cyclictest	3599305	-21	kworker/u4:14+events_unbound	07:45:00	1
3592940	99	84	33,38	cyclictest	0	-21	swapper/0	10:45:32	0
3592941	99	83	73,8	cyclictest	3783033	-21	kworker/u4:4+events_unbound	12:25:32	1
3592940	99	83	33,29	cyclictest	3597340	-21	fschecks_time	07:25:23	0
3592941	99	81	76,3	cyclictest	3735332	-21	kworker/u4:11-rpciod	11:37:26	1
3592941	99	78	68,7	cyclictest	3674710	-21	kworker/u4:0+events_unbound	10:36:16	1
3592940	99	77	70,5	cyclictest	3617078	-21	kworker/u4:11+events_unbound	09:17:00	0
3592940	99	75	30,42	cyclictest	3798789	-21	ntp_kernel_pll_	12:30:29	0
3592940	99	74	4,62	cyclictest	3592939	-21	cyclictest	07:10:00	0
3592940	99	73	36,21	cyclictest	3665745	-21	ssh	09:57:17	0
3592940	99	72	1,49	cyclictest	3728642	-21	sed	11:10:01	0
3592940	99	69	2,63	cyclictest	3781563	-21	ssh	12:10:35	0
3592940	99	69	2,45	cyclictest	3780396	-21	cron	12:10:00	0
3592940	99	69	1,48	cyclictest	3706459	-21	ssh	10:44:16	0
3592941	99	68	61,5	cyclictest	3614451	-21	kworker/u4:15+events_unbound	08:39:36	1
3592940	99	68	50,15	cyclictest	54	-21	kswapd0	10:15:01	0
3592940	99	68	34,31	cyclictest	3789685	-21	entropy	12:20:19	0
3592940	99	68	31,35	cyclictest	3646961	-21	timerwakeupswit	09:35:38	0
3592941	99	67	55,9	cyclictest	3796239	-21	kworker/u4:0+events_unbound	12:30:32	1
3592940	99	67	60,5	cyclictest	3669593	-21	kworker/u4:6+events_unbound	10:30:05	0
3592940	99	67	55,9	cyclictest	255	50	irq/23-42890000.ethernet	11:30:12	0
3592940	99	67	3,46	cyclictest	3794433	-21	ntpq	12:25:29	0
3592940	99	67	30,32	cyclictest	0	-21	swapper/0	09:30:33	0
3592940	99	67	2,29	cyclictest	3623712	-21	apt-get	09:10:14	0
3592940	99	64	58,4	cyclictest	3594162	-21	kworker/u4:5+events_unbound	07:20:00	0
3592940	99	64	32,29	cyclictest	0	-21	swapper/0	10:50:36	0
3592940	99	64	31,30	cyclictest	3609734	-21	aten_r7power_vo	08:15:15	0
3592940	99	64	2,55	cyclictest	3604547	-21	apt-get	07:55:12	0
3592940	99	64	14,48	cyclictest	54	-21	kswapd0	12:15:10	0
3592940	99	64	1,14	cyclictest	3622875	-21	ntpq	09:05:27	0
3592941	99	63	53,8	cyclictest	3716326	-21	gltestperf	10:55:23	1
3592940	99	63	4,43	cyclictest	3750461	-21	sshd	11:35:15	0
3592940	99	63	20,27	cyclictest	0	-21	swapper/0	10:00:16	0
3592941	99	62	2,47	cyclictest	3668468	-21	ssh	10:00:24	1
3592940	99	62	47,9	cyclictest	3661276	-21	kworker/u4:11-rpciod	10:06:07	0
3592940	99	62	4,53	cyclictest	3621071	-21	apt-get	09:00:13	0
3592940	99	62	4,51	cyclictest	3600784	-21	apt-get	07:40:11	0
3592940	99	62	3,54	cyclictest	3728856	-21	ssh	11:10:16	0
3592940	99	62	31,29	cyclictest	3612225	-21	aten_r7power_en	08:25:15	0
3592941	99	61	46,8	cyclictest	0	-21	swapper/1	11:10:26	1
3592940	99	61	40,19	cyclictest	1064	-21	lldpd	07:37:02	0
3592940	99	61	30,27	cyclictest	0	-21	swapper/0	10:15:20	0
3592940	99	61	2,55	cyclictest	3737482	-21	apt-get	11:20:12	0
3592940	99	61	2,55	cyclictest	3651021	-21	ntpq	09:40:29	0
3592940	99	61	2,54	cyclictest	3716667	-21	ntpq	10:55:34	0
3592940	99	61	1,11	cyclictest	3759833	-21	ntpq	11:45:28	0
3592940	99	61	1,10	cyclictest	3637868	-21	ntpq	09:25:34	0
3592941	99	60	52,6	cyclictest	3700833	-21	kworker/u4:4+events_unbound	10:45:09	1
3592940	99	60	4,50	cyclictest	3619083	-21	ntpq	08:50:24	0
3592940	99	60	38,20	cyclictest	3742311	-21	gltestperf	11:25:20	0
3592940	99	60	37,21	cyclictest	3685458	-21	aten_r7power_cu	10:20:15	0
3592940	99	60	28,30	cyclictest	3618332	-21	kworker/u4:1+rpciod	08:55:34	0
3592940	99	60	2,53	cyclictest	3598863	-21	ntpq	07:30:29	0
3592940	99	60	1,9	cyclictest	3615301	-21	ntp_kernel_pll_	08:35:30	0
3592940	99	60	1,6	cyclictest	3699374	-21	ntp_states	10:35:32	0
3592941	99	59	44,8	cyclictest	3715586	-21	kworker/u4:12	10:55:00	1
3592940	99	59	28,27	cyclictest	0	-21	swapper/0	08:10:17	0
3592940	99	59	2,53	cyclictest	3602635	-21	ntpq	07:45:26	0
3592940	99	59	2,49	cyclictest	3605828	-21	apt-get	08:00:11	0
3592940	99	59	2,42	cyclictest	3613397	-21	apt-get	08:30:12	0
3592940	99	59	1,3	cyclictest	3772049	-21	apt-get	12:00:12	0
3592941	99	58	47,8	cyclictest	3620846	-21	kworker/u4:13+events_unbound	09:34:46	1
3592941	99	58	35,8	cyclictest	3769852	-21	kworker/u4:0+events_unbound	12:00:02	1
3592940	99	58	2,53	cyclictest	3733955	-21	ntpq	11:15:31	0
3592940	99	58	25,30	cyclictest	0	-21	swapper/0	09:50:13	0
3592940	99	58	19,37	cyclictest	255	50	irq/23-42890000.ethernet	08:05:29	0
3592940	99	58	1,53	cyclictest	3720612	-21	ssh	11:00:23	0
3592941	99	57	49,6	cyclictest	3670251	-21	kworker/u4:8+events_unbound	11:05:11	1
3592941	99	57	47,7	cyclictest	0	-21	swapper/1	10:10:36	1
3592940	99	57	3,46	cyclictest	3593104	-21	apt-get	07:10:12	0
3592940	99	57	2,51	cyclictest	3617905	-21	ntpq	08:45:31	0
3592940	99	57	2,51	cyclictest	3595652	-21	apt-get	07:20:11	0
3592940	99	57	2,40	cyclictest	3655701	-21	ssh	09:45:38	0
3592941	99	56	49,5	cyclictest	3735332	-21	kworker/u4:11+events_unbound	11:21:43	1
3592940	99	56	2,6	cyclictest	3693938	-21	latency_hist	10:30:01	0
3592940	99	56	25,25	cyclictest	0	-21	swapper/0	12:35:21	0
3592940	99	56	2,49	cyclictest	3610888	-21	apt-get	08:20:11	0
3592940	99	56	2,3	cyclictest	3765474	-21	kworker/u4:1+rpciod	11:55:12	0
3592940	99	55	4,45	cyclictest	3616595	-21	ntpq	08:40:27	0
3592940	99	55	4,45	cyclictest	3616595	-21	ntpq	08:40:27	0
3592940	99	55	2,48	cyclictest	3603839	-21	ntpq	07:50:22	0
3592941	99	54	47,5	cyclictest	3781386	-21	ssh	12:10:25	1
3592941	99	53	46,5	cyclictest	3676359	-21	latency_hist	10:10:01	1
3592941	99	53	45,6	cyclictest	3592939	-21	cyclictest	09:20:24	1
3592941	99	52	45,5	cyclictest	3796239	-21	kworker/u4:0+events_unbound	12:35:35	1
3592941	99	51	43,6	cyclictest	3618333	-21	kworker/u4:3+events_unbound	09:00:34	1
3592941	99	50	40,6	cyclictest	3754784	-21	dpkg	11:40:11	1
3592941	99	50	39,9	cyclictest	3790120	-21	ssh	12:20:28	1
3592941	99	49	41,6	cyclictest	3767463	-21	latency_hist	11:55:01	1
3592941	99	49	41,6	cyclictest	3733171	-21	/usr/sbin/munin	11:15:16	1
3592941	99	49	41,6	cyclictest	3600568	-21	systemd	07:39:24	1
3592941	99	49	41,5	cyclictest	3659855	-21	ssh	09:50:34	1
3592941	99	47	39,5	cyclictest	3776440	-21	/usr/sbin/munin	12:05:16	1
3592941	99	47	34,9	cyclictest	0	-21	swapper/1	09:15:16	1
3592941	99	47	33,9	cyclictest	0	-21	swapper/1	09:45:12	1
3592941	99	46	40,4	cyclictest	3785144	-21	aten2__	12:15:21	1
3592941	99	46	40,4	cyclictest	3598659	-21	gltestperf	07:30:19	1
3592941	99	46	39,5	cyclictest	3750203	-21	latency_hist	11:35:02	1
3592941	99	46	39,5	cyclictest	3618851	-21	fschecks_time	08:50:20	1
3592941	99	46	39,5	cyclictest	3607913	-21	awk	08:05:35	1
3592941	99	46	36,8	cyclictest	54	-21	kswapd0	11:55:18	1
3592941	99	46	36,8	cyclictest	3663676	-21	ssh	09:55:19	1
3592941	99	46	36,6	cyclictest	3592939	-21	cyclictest	07:52:16	1
3592941	99	46	35,9	cyclictest	3720809	-21	kernelversion	11:00:26	1
3592941	99	45	40,4	cyclictest	3680842	-21	sshd	10:15:02	1
3592941	99	45	39,4	cyclictest	3595719	-21	aten_r7power_en	07:20:15	1
3592941	99	45	37,6	cyclictest	3694205	-21	ssh	10:30:16	1
3592941	99	45	37,6	cyclictest	3687473	-21	kworker/u4:15+events_unbound	10:25:04	1
3592941	99	45	36,7	cyclictest	3617962	-21	proc_pri	08:45:34	1
3592941	99	45	34,8	cyclictest	3616511	-21	kernelversion	08:40:22	1
3592941	99	45	34,8	cyclictest	3616511	-21	kernelversion	08:40:22	1
3592941	99	45	34,7	cyclictest	0	-21	swapper/1	09:10:35	1
3592941	99	45	25,10	cyclictest	17	1	rcu_preempt	07:55:23	1
3592941	99	44	8,23	cyclictest	3646541	-21	ssh	09:35:26	1
3592941	99	44	38,4	cyclictest	3594172	-21	systemd	07:14:21	1
3592941	99	44	37,5	cyclictest	3623447	-21	idleruntime-cro	09:10:00	1
3592941	99	44	35,7	cyclictest	3613272	-21	latency_hist	08:30:00	1
3592941	99	43	37,4	cyclictest	3744154	-21	kworker/u4:24-rpciod	11:30:00	1
3592941	99	43	36,5	cyclictest	3650439	-21	aten_r7power_vo	09:40:18	1
3592941	99	42	36,4	cyclictest	3685440	-21	aten_r7power_cu	10:20:15	1
3592941	99	42	36,4	cyclictest	3595261	-21	timerwakeupswit	07:15:36	1
3592941	99	42	35,5	cyclictest	3620078	-21	fschecks_count	08:55:18	1
3592941	99	42	33,7	cyclictest	3611080	-21	df_abs	08:20:15	1
3592941	99	42	33,6	cyclictest	0	-21	swapper/1	10:40:26	1
3592941	99	42	31,7	cyclictest	0	-21	swapper/1	09:25:34	1
3592941	99	41	33,5	cyclictest	3595426	-21	kworker/u4:7-rpciod	08:15:36	1
3592941	99	40	31,6	cyclictest	3596706	-21	kworker/u4:11-rpciod	07:25:23	1
3592941	99	39	28,9	cyclictest	0	-21	swapper/1	08:10:20	1
3592941	99	39	27,9	cyclictest	3595426	-21	kworker/u4:7-rpciod	07:45:26	1
3592941	99	37	30,5	cyclictest	3606117	-21	fschecks_count	08:00:19	1
3592941	99	35	26,7	cyclictest	0	-21	swapper/1	07:10:02	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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