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 376 highest latencies:

System rack7slot2.osadl.org (updated Mon Aug 10, 2026 12:44:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3358625	99	110	102,6	cyclictest	3449853	-21	kworker/u4:4+events_unbound	10:25:38	1
3358624	99	101	92,6	cyclictest	3432531	-21	kworker/u4:8+events_unbound	10:10:35	0
3358624	99	95	75,6	cyclictest	3489630	-21	kworker/u4:3+events_unbound	11:10:48	0
3358625	99	93	86,5	cyclictest	3363696	-21	kworker/u4:10+events_unbound	07:29:53	1
3358625	99	87	79,6	cyclictest	3371351	-21	kworker/u4:14+events_unbound	09:20:26	1
3358625	99	86	79,5	cyclictest	3529337	-21	kworker/u4:1+events_unbound	11:50:56	1
3358625	99	79	71,6	cyclictest	3564501	-21	kworker/u4:4+events_unbound	12:31:03	1
3358624	99	79	64,5	cyclictest	3419048	-21	kworker/u4:1+events_unbound	09:50:33	0
3358625	99	78	71,5	cyclictest	3485135	-21	kworker/u4:7+events_unbound	11:05:47	1
3358625	99	76	68,6	cyclictest	3515881	-21	kworker/u4:5+events_unbound	11:40:54	1
3358624	99	76	61,6	cyclictest	3386763	-21	kworker/u4:0+events_unbound	09:10:24	0
3358624	99	76	61,6	cyclictest	3386763	-21	kworker/u4:0+events_unbound	09:10:23	0
3358625	99	75	68,5	cyclictest	3363691	-21	kworker/u4:5+events_unbound	07:34:52	1
3358625	99	75	67,6	cyclictest	3356110	-21	kworker/u4:2+events_unbound	07:14:50	1
3358625	99	75	67,6	cyclictest	3356110	-21	kworker/u4:2+events_unbound	07:14:50	1
3358624	99	75	67,5	cyclictest	3419048	-21	kworker/u4:1+events_unbound	09:55:32	0
3358624	99	74	65,7	cyclictest	3515880	-21	kworker/u4:4+events_unbound	11:35:53	0
3358624	99	72	65,5	cyclictest	3515879	-21	kworker/u4:2+events_unbound	12:21:03	0
3358624	99	72	65,5	cyclictest	3515879	-21	kworker/u4:2+events_unbound	12:21:03	0
3358625	99	71	56,6	cyclictest	3371343	-21	kworker/u4:2+events_unbound	08:20:10	1
3358625	99	67	59,6	cyclictest	3404315	-21	find	09:25:39	1
3358625	99	67	55,8	cyclictest	0	-21	swapper/1	11:20:26	1
3358625	99	66	59,5	cyclictest	3362420	-21	kworker/u4:0+events_unbound	07:24:52	1
3358624	99	66	59,5	cyclictest	3371352	-21	kworker/u4:15+events_unbound	08:15:01	0
3358625	99	64	52,9	cyclictest	53	-21	kswapd0	11:50:01	1
3358624	99	64	55,7	cyclictest	3394821	-21	/usr/sbin/munin	09:15:25	0
3358624	99	63	55,6	cyclictest	3533822	-21	kworker/u4:9+events_unbound	12:00:59	0
3358624	99	63	46,7	cyclictest	3386765	-21	kworker/u4:3+events_unbound	09:00:01	0
3358625	99	61	55,4	cyclictest	3533821	-21	kworker/u4:8+events_unbound	12:05:01	1
3358625	99	60	53,5	cyclictest	3358551	-21	kworker/u4:9+events_unbound	07:10:00	1
3358625	99	60	52,6	cyclictest	3371351	-21	kworker/u4:14+events_unbound	08:25:11	1
3358624	99	60	38,19	cyclictest	378	-21	dbus-daemon	10:30:38	0
3358625	99	59	52,4	cyclictest	3454350	-21	kworker/u4:3-events_power_efficient	10:22:44	1
3358625	99	59	43,10	cyclictest	0	-21	swapper/1	09:15:30	1
3358625	99	59	42,13	cyclictest	3484059	-21	/usr/sbin/munin	10:55:41	1
3358624	99	59	51,6	cyclictest	3371343	-21	kworker/u4:2+events_unbound	08:30:11	0
3358624	99	59	43,7	cyclictest	3458836	-21	kworker/u4:2+events_unbound	10:45:41	0
3358625	99	58	47,9	cyclictest	53	-21	kswapd0	11:20:01	1
3358625	99	58	46,6	cyclictest	0	-21	swapper/1	11:55:17	1
3358624	99	58	49,7	cyclictest	0	-21	swapper/0	10:35:28	0
3358624	99	58	45,8	cyclictest	3544687	-21	ssh	12:05:14	0
3358625	99	57	49,6	cyclictest	3371352	-21	kworker/u4:15+events_unbound	08:15:08	1
3358624	99	57	49,6	cyclictest	3371349	-21	kworker/u4:12+events_unbound	08:05:04	0
3358624	99	57	48,7	cyclictest	3376666	-21	systemd	08:20:10	0
3358625	99	56	47,6	cyclictest	3475333	-21	grep	10:45:41	1
3358624	99	55	47,6	cyclictest	3467799	-21	kworker/u4:11+events_unbound	10:40:42	0
3358624	99	55	47,5	cyclictest	0	-21	swapper/0	09:20:28	0
3358624	99	55	44,9	cyclictest	3371345	-21	kworker/u4:4+events_unbound	08:50:16	0
3358625	99	54	7,43	cyclictest	3412816	-21	ssh	09:35:23	1
3358625	99	54	48,4	cyclictest	3342063	-21	kworker/u4:13+events_unbound	07:19:59	1
3358625	99	54	41,8	cyclictest	0	-21	swapper/1	10:30:12	1
3358625	99	54	40,10	cyclictest	0	-21	swapper/1	09:50:37	1
3358624	99	54	24,25	cyclictest	53	-21	kswapd0	11:20:13	0
3358625	99	53	46,5	cyclictest	3371350	-21	kworker/u4:13+events_unbound	08:45:03	1
3358624	99	53	45,6	cyclictest	3492854	-21	threads	11:05:39	0
3358624	99	53	44,7	cyclictest	3457350	-21	sshd	10:25:36	0
3358624	99	53	2,17	cyclictest	3571917	-21	ntp_states	12:35:33	0
3358624	99	53	2,17	cyclictest	3571917	-21	ntp_states	12:35:32	0
3358625	99	52	45,5	cyclictest	3494125	-21	kworker/u4:0+events_unbound	11:35:05	1
3358625	99	52	45,5	cyclictest	3382869	-21	kworker/u4:17+events_unbound	08:50:31	1
3358624	99	52	45,5	cyclictest	3555552	-21	kworker/u4:5+events_unbound	12:26:04	0
3358624	99	52	41,6	cyclictest	0	-21	swapper/0	11:15:12	0
3358624	99	52	32,7	cyclictest	3489630	-21	kworker/u4:3+events_unbound	11:30:53	0
3358625	99	51	8,30	cyclictest	3571764	-21	ntpq	12:35:24	1
3358625	99	51	8,30	cyclictest	3571764	-21	ntpq	12:35:24	1
3358625	99	51	45,4	cyclictest	3467799	-21	kworker/u4:11+events_unbound	10:40:01	1
3358625	99	51	45,4	cyclictest	3432527	-21	kworker/u4:0+events_unbound	10:05:02	1
3358625	99	51	39,8	cyclictest	0	-21	swapper/1	09:40:29	1
3358625	99	51	39,8	cyclictest	0	-21	swapper/1	09:40:28	1
3358625	99	51	35,10	cyclictest	0	-21	swapper/1	08:30:25	1
3358624	99	51	43,5	cyclictest	3412138	-21	acpi	09:35:10	0
3358625	99	50	42,6	cyclictest	3520367	-21	kworker/u4:10+events_unbound	11:39:26	1
3358625	99	50	39,7	cyclictest	0	-21	swapper/1	10:00:39	1
3358625	99	50	30,12	cyclictest	3373933	-21	modprobe	08:10:00	1
3358624	99	50	43,5	cyclictest	3522734	-21	aten_r7power_cu	11:40:16	0
3358624	99	50	43,5	cyclictest	3453303	-21	unixbench_singl	10:20:40	0
3358624	99	50	42,5	cyclictest	0	-21	swapper/0	09:45:39	0
3358624	99	50	39,7	cyclictest	0	-21	swapper/0	11:55:35	0
3358625	99	49	42,5	cyclictest	3390146	-21	gltestperf	09:10:21	1
3358625	99	49	42,5	cyclictest	3390146	-21	gltestperf	09:10:21	1
3358625	99	49	41,6	cyclictest	3449850	-21	kworker/u4:0+events_unbound	10:19:44	1
3358625	99	49	41,5	cyclictest	0	-21	swapper/1	07:39:54	1
3358625	99	49	40,6	cyclictest	0	-21	swapper/1	12:05:25	1
3358625	99	49	38,8	cyclictest	3375013	-21	timerwakeupswit	08:10:38	1
3358624	99	49	41,5	cyclictest	3400843	-21	kworker/u4:1+events_unbound	09:29:45	0
3358624	99	49	30,5	cyclictest	0	-21	swapper/0	08:35:16	0
3358625	99	48	39,5	cyclictest	0	-21	swapper/1	08:00:01	1
3358625	99	48	37,7	cyclictest	3405416	-21	kworker/u4:8-rpciod	09:30:27	1
3358624	99	48	41,5	cyclictest	3528214	-21	/usr/sbin/munin	11:45:39	0
3358624	99	48	41,5	cyclictest	3359118	-21	fschecks_time	07:10:19	0
3358624	99	48	41,5	cyclictest	3359118	-21	fschecks_time	07:10:18	0
3358624	99	48	40,6	cyclictest	3439759	-21	sendmail_mailqu	10:05:39	0
3358625	99	47	7,31	cyclictest	3559717	-21	ssh	12:21:27	1
3358625	99	47	7,31	cyclictest	3559717	-21	ssh	12:21:27	1
3358625	99	47	41,4	cyclictest	3510159	-21	ntpq	11:25:29	1
3358625	99	47	40,5	cyclictest	3371349	-21	kworker/u4:12+events_unbound	09:05:02	1
3358625	99	47	39,6	cyclictest	3440873	-21	kworker/u4:2+events_unbound	10:10:25	1
3358625	99	47	38,6	cyclictest	3368604	-21	timerandwakeup	07:45:35	1
3358624	99	47	42,3	cyclictest	3515879	-21	kworker/u4:2+events_unbound	12:16:59	0
3358624	99	47	40,5	cyclictest	3531504	-21	aten_r7power_cu	11:50:15	0
3358624	99	47	40,5	cyclictest	3487391	-21	aten2__	11:00:15	0
3358624	99	47	38,7	cyclictest	3408055	-21	fschecks_count	09:30:20	0
3358624	99	47	37,6	cyclictest	0	-21	swapper/0	10:55:29	0
3358624	99	47	14,19	cyclictest	0	-21	swapper/0	12:10:30	0
3358624	99	47	14,19	cyclictest	0	-21	swapper/0	12:10:30	0
3358625	99	46	39,5	cyclictest	3431209	-21	unixbench_multi	09:55:44	1
3358625	99	46	37,6	cyclictest	3566479	-21	latency_hist	12:30:01	1
3358624	99	46	37,7	cyclictest	378	-21	dbus-daemon	12:31:02	0
3358624	99	46	36,7	cyclictest	3371407	-21	sendmail	08:00:00	0
3358625	99	45	37,6	cyclictest	3487644	-21	fschecks_count	11:00:19	1
3358625	99	45	34,6	cyclictest	0	-21	swapper/1	12:15:31	1
3358624	99	45	40,3	cyclictest	3432531	-21	kworker/u4:8+events_unbound	10:00:39	0
3358624	99	45	37,6	cyclictest	3363691	-21	kworker/u4:5+events_unbound	07:49:58	0
3358624	99	45	36,7	cyclictest	3479812	-21	unixbench_singl	10:50:42	0
3358624	99	45	36,7	cyclictest	3479812	-21	unixbench_singl	10:50:41	0
3358624	99	45	24,18	cyclictest	0	-21	swapper/0	07:15:23	0
3358625	99	44	37,5	cyclictest	3479758	-21	sh	10:50:42	1
3358625	99	44	37,5	cyclictest	3479758	-21	sh	10:50:41	1
3358625	99	44	37,5	cyclictest	3469851	-21	aten_r7power_vo	10:40:17	1
3358625	99	44	36,6	cyclictest	3386764	-21	kworker/u4:1+events_unbound	09:04:45	1
3358625	99	44	35,7	cyclictest	3380788	-21	fschecks_count	08:35:19	1
3358625	99	44	34,8	cyclictest	3371345	-21	kworker/u4:4+events_unbound	08:00:15	1
3358624	99	44	35,7	cyclictest	3376411	-21	unixbench_singl	08:15:38	0
3358624	99	44	34,7	cyclictest	0	-21	swapper/0	11:25:19	0
3358625	99	43	35,6	cyclictest	3371344	-21	kworker/u4:3+events_unbound	08:40:13	1
3358625	99	43	33,7	cyclictest	0	-21	swapper/1	07:40:38	1
3358624	99	43	36,5	cyclictest	3382552	-21	cat	08:40:37	0
3358624	99	43	33,7	cyclictest	3370118	-21	sd-accept	07:55:00	0
3358624	99	43	30,8	cyclictest	3417040	-21	kthreadd	09:40:19	0
3358624	99	43	30,8	cyclictest	3417040	-21	kthreadd	09:40:18	0
3358624	99	43	29,6	cyclictest	3445352	-21	kworker/u4:3+events_unbound	10:15:36	0
3358625	99	42	32,7	cyclictest	0	-21	swapper/1	12:15:00	1
3358625	99	42	32,7	cyclictest	0	-21	swapper/1	12:14:59	1
3358624	99	42	36,4	cyclictest	3383146	-21	apt-get	08:45:14	0
3358624	99	42	35,5	cyclictest	3378253	-21	fschecks_time	08:25:19	0
3358624	99	42	34,6	cyclictest	3389000	-21	sendmail_mailqu	09:05:35	0
3358624	99	42	34,6	cyclictest	3366145	-21	unixbench_multi	07:35:39	0
3358625	99	41	12,6	cyclictest	26	1	rcuc/1	09:45:36	1
3358624	99	41	34,5	cyclictest	3366821	-21	gltestperf	07:40:18	0
3358624	99	41	31,8	cyclictest	3387232	-21	uniq	09:00:20	0
3358624	99	41	25,14	cyclictest	3362442	-21	kworker/u4:15	07:25:00	0
3358624	99	41	24,7	cyclictest	3358550	-21	kworker/u4:8+events_unbound	07:35:01	0
3358625	99	40	31,6	cyclictest	3370203	-21	latency_hist	07:55:01	1
3358625	99	39	6,22	cyclictest	3496478	-21	ssh	11:10:17	1
3358624	99	38	31,5	cyclictest	0	-21	swapper/0	07:25:21	0
3358624	99	38	30,6	cyclictest	3371973	-21	gltestperf	08:00:21	0
3358625	99	36	29,4	cyclictest	3371350	-21	kworker/u4:13-rpciod	08:55:20	1
3358624	99	25	16,7	cyclictest	3358635	-21	ls	07:10:02	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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