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 highest latencies:

System rack7slot2.osadl.org (updated Mon Sep 15, 2025 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
96531	99	115	106,6	cyclictest	170579	-21	kworker/u4:7+events_unbound	10:41:06	1
96531	99	105	93,9	cyclictest	116023	-21	kworker/u4:4+events_unbound	08:30:31	1
96529	99	100	91,7	cyclictest	161170	-21	kworker/u4:5+events_unbound	10:06:03	0
96531	99	99	90,7	cyclictest	110798	-21	kworker/u4:17+events_unbound	08:15:41	1
96531	99	98	88,7	cyclictest	135766	-21	kworker/u4:2+events_unbound	09:50:46	1
96529	99	95	82,9	cyclictest	135766	-21	kworker/u4:2+events_unbound	09:40:46	0
96531	99	90	80,7	cyclictest	116019	-21	kworker/u4:1+events_unbound	08:45:36	1
96531	99	89	79,7	cyclictest	113436	-21	kworker/u4:0+events_unbound	08:25:43	1
96531	99	86	74,9	cyclictest	119854	-21	kworker/u4:15+events_unbound	09:10:40	1
96531	99	86	73,10	cyclictest	86470	-21	kworker/u4:14+events_unbound	07:15:21	1
96531	99	86	71,8	cyclictest	86468	-21	kworker/u4:2+events_unbound	07:55:28	1
96531	99	82	74,6	cyclictest	100363	-21	kworker/u4:18+events_unbound	07:50:29	1
96531	99	81	70,7	cyclictest	96476	-21	kworker/u4:7+events_unbound	07:45:13	1
96531	99	80	71,7	cyclictest	135765	-21	kworker/u4:1+events_unbound	09:30:58	1
96531	99	78	68,7	cyclictest	108221	-21	kworker/u4:11+events_unbound	08:05:21	1
96531	99	77	66,9	cyclictest	116019	-21	kworker/u4:1+events_unbound	08:35:33	1
96529	99	77	62,13	cyclictest	86468	-21	kworker/u4:2+events_unbound	07:25:01	0
96529	99	76	69,4	cyclictest	210613	-21	fschecks_count	11:20:22	0
96529	99	75	53,19	cyclictest	96527	-21	cyclictest	11:55:10	0
96531	99	74	38,9	cyclictest	147299	-21	fschecks_count	09:40:22	1
96531	99	69	59,8	cyclictest	108221	-21	kworker/u4:11+events_unbound	08:40:33	1
96529	99	69	62,5	cyclictest	82520	-21	kworker/u4:13+events_unbound	08:10:20	0
96531	99	68	60,6	cyclictest	82520	-21	kworker/u4:13+events_unbound	08:10:40	1
96531	99	68	60,6	cyclictest	218554	-21	kworker/u4:10+events_unbound	11:36:14	1
96531	99	68	51,11	cyclictest	37	-21	kcompactd0	12:20:16	1
96531	99	66	57,6	cyclictest	94025	-21	kworker/u4:1+events_unbound	07:25:24	1
96529	99	66	4,56	cyclictest	153240	-21	ssh	09:50:11	0
96531	99	65	58,5	cyclictest	225403	-21	kworker/u4:1+events_unbound	11:46:16	1
96531	99	65	56,6	cyclictest	218554	-21	kworker/u4:10+events_unbound	11:56:19	1
96531	99	64	56,6	cyclictest	135766	-21	kworker/u4:2+events_unbound	09:56:01	1
96531	99	63	56,5	cyclictest	202459	-21	kworker/u4:13+events_unbound	11:26:13	1
96531	99	63	56,5	cyclictest	158027	-21	kworker/u4:11+events_unbound	10:00:49	1
96531	99	63	55,6	cyclictest	250399	-21	kworker/u4:10+events_unbound	12:36:26	1
96531	99	63	50,5	cyclictest	81215	-21	kworker/u4:8+events_unbound	07:30:05	1
96529	99	63	45,12	cyclictest	53	-21	kswapd0	12:30:09	0
96529	99	62	24,30	cyclictest	257	50	irq/23-42890000.ethernet	07:50:09	0
96531	99	61	47,5	cyclictest	173127	-21	kworker/u4:8+events_unbound	10:25:01	1
96531	99	61	47,5	cyclictest	173127	-21	kworker/u4:8+events_unbound	10:25:01	1
96531	99	60	52,6	cyclictest	95263	-21	kworker/u4:5+events_unbound	07:10:22	1
96529	99	60	41,15	cyclictest	184224	-21	aten2__	10:40:16	0
96531	99	59	49,7	cyclictest	170577	-21	kworker/u4:0+events_unbound	10:35:55	1
96529	99	59	52,5	cyclictest	96527	-21	cyclictest	10:55:35	0
96531	99	58	51,5	cyclictest	243933	-21	kworker/u4:9+events_unbound	12:26:27	1
96529	99	57	46,8	cyclictest	192455	-21	kworker/u4:0+events_unbound	11:01:10	0
96529	99	57	16,13	cyclictest	165362	-21	apt-get	10:10:13	0
96531	99	56	48,6	cyclictest	113436	-21	kworker/u4:0+events_unbound	08:20:25	1
96531	99	56	36,6	cyclictest	94026	-21	kworker/u4:3+events_unbound	08:00:33	1
96529	99	56	33,17	cyclictest	181054	-21	apt-get	10:35:12	0
96531	99	55	48,5	cyclictest	148506	-21	kworker/u4:0+events_unbound	09:45:46	1
96531	99	55	48,5	cyclictest	0	-21	swapper/1	10:30:13	1
96529	99	55	47,6	cyclictest	258670	-21	/usr/sbin/munin	12:35:23	0
96529	99	55	18,8	cyclictest	123899	-21	apt-get	08:55:13	0
96531	99	54	47,5	cyclictest	199105	-21	kworker/u4:2+events_unbound	11:06:08	1
96531	99	54	46,6	cyclictest	99262	-21	systemd	07:20:02	1
96531	99	54	31,10	cyclictest	258092	-21	idleruntime-cro	12:34:59	1
96529	99	54	46,6	cyclictest	228564	-21	kworker/u4:0+events_unbound	12:15:36	0
96529	99	54	35,5	cyclictest	249525	-21	proc_pri	12:20:38	0
96529	99	54	11,19	cyclictest	81215	-21	kworker/u4:8+rpciod	07:27:16	0
96531	99	53	46,5	cyclictest	189104	-21	kworker/u4:2+events_unbound	10:56:08	1
96529	99	53	45,5	cyclictest	213490	-21	/usr/sbin/munin	11:25:17	0
96529	99	53	44,6	cyclictest	220462	-21	fschecks_count	11:35:22	0
96531	99	52	46,4	cyclictest	223592	-21	aten2__	11:40:18	1
96531	99	52	45,5	cyclictest	240433	-21	kworker/u4:1+events_unbound	12:11:23	1
96531	99	52	45,5	cyclictest	228564	-21	kworker/u4:0+events_unbound	12:16:21	1
96531	99	52	45,5	cyclictest	137769	-21	fschecks_count	09:25:21	1
96531	99	52	44,6	cyclictest	124646	-21	systemd	08:55:36	1
96529	99	52	3,11	cyclictest	102943	-21	apt-get	07:35:10	0
96529	99	52	16,9	cyclictest	206911	-21	apt-get	11:15:11	0
96531	99	51	44,5	cyclictest	170037	-21	systemd	10:16:02	1
96529	99	51	14,12	cyclictest	227595	-21	ssh	11:45:35	0
96531	99	50	44,4	cyclictest	198606	-21	sshd	11:01:07	1
96531	99	50	41,7	cyclictest	170578	-21	kworker/u4:5+events_unbound	10:21:03	1
96529	99	50	42,6	cyclictest	199105	-21	kworker/u4:2+events_unbound	11:31:12	0
96529	99	50	39,7	cyclictest	117300	-21	kworker/u4:6-xprtiod	08:50:17	0
96529	99	50	33,12	cyclictest	127598	-21	diskmemload	11:05:15	0
96529	99	50	18,5	cyclictest	175536	-21	ntpq	10:25:41	0
96529	99	50	18,5	cyclictest	175536	-21	ntpq	10:25:40	0
96529	99	49	9,14	cyclictest	239416	-21	ntpq	12:05:22	0
96529	99	49	43,4	cyclictest	177933	-21	aten2__	10:30:15	0
96529	99	49	39,7	cyclictest	109496	-21	kworker/u4:12-events_unbound	08:30:23	0
96529	99	49	38,8	cyclictest	150403	-21	df_abs	09:45:17	0
96529	99	49	28,18	cyclictest	0	-21	swapper/0	11:10:48	0
96529	99	49	2,36	cyclictest	0	-21	swapper/0	09:10:31	0
96531	99	48	39,7	cyclictest	190758	-21	aten_r7power_vo	10:50:15	1
96529	99	48	39,7	cyclictest	53	-21	kswapd0	10:20:23	0
96529	99	48	39,7	cyclictest	127559	-21	kworker/u4:3+events_unbound	09:25:59	0
96529	99	48	39,6	cyclictest	0	-21	swapper/0	08:05:37	0
96529	99	48	38,7	cyclictest	379	-21	dbus-daemon	09:55:47	0
96529	99	48	34,11	cyclictest	224520	-21	mailstats	11:40:40	0
96529	99	48	25,20	cyclictest	0	-21	swapper/0	08:40:00	0
96529	99	48	11,11	cyclictest	102382	-21	sshd	07:30:24	0
96529	99	48	10,14	cyclictest	253283	-21	ssh	12:26:12	0
96531	99	47	39,5	cyclictest	116024	-21	kworker/u4:5-events_unbound	09:05:38	1
96529	99	47	8,11	cyclictest	169428	-21	ntp_states	10:15:35	0
96529	99	47	30,4	cyclictest	0	-21	swapper/0	10:55:00	0
96529	99	47	28,13	cyclictest	115586	-21	ntpq	08:20:32	0
96529	99	47	25,18	cyclictest	119854	-21	kworker/u4:15-rpciod	09:05:00	0
96531	99	46	42,2	cyclictest	234952	-21	kworker/u4:12+events_unbound	12:05:01	1
96531	99	46	40,4	cyclictest	217735	-21	find	11:30:37	1
96531	99	46	40,4	cyclictest	0	-21	swapper/1	08:50:35	1
96531	99	46	38,6	cyclictest	164046	-21	kworker/u4:3+events_unbound	10:10:51	1
96531	99	46	37,6	cyclictest	0	-21	swapper/1	10:45:31	1
96531	99	46	37,6	cyclictest	0	-21	swapper/1	09:35:58	1
96531	99	46	35,8	cyclictest	239652	-21	proc_pri	12:05:35	1
96529	99	46	40,4	cyclictest	143724	-21	aten_r7power_en	09:35:18	0
96529	99	46	39,5	cyclictest	233351	-21	latency_hist	11:55:02	0
96529	99	46	37,7	cyclictest	106826	-21	unixbench_singl	07:45:37	0
96531	99	45	37,6	cyclictest	134973	-21	ntpq	09:20:36	1
96531	99	45	37,5	cyclictest	233408	-21	ssh	11:55:02	1
96529	99	45	34,9	cyclictest	131270	-21	fschecks_time	09:15:21	0
96529	99	45	20,12	cyclictest	0	-21	swapper/0	07:10:26	0
96529	99	45	11,14	cyclictest	15	1	ktimers/0	09:30:29	0
96531	99	44	34,8	cyclictest	118576	-21	kworker/u4:9+events_unbound	09:00:39	1
96531	99	44	34,7	cyclictest	0	-21	swapper/1	11:20:35	1
96531	99	44	34,7	cyclictest	0	-21	swapper/1	09:15:26	1
96531	99	44	31,10	cyclictest	37	-21	kcompactd0	11:19:24	1
96529	99	44	36,6	cyclictest	114796	-21	latency_hist	08:20:02	0
96529	99	44	27,12	cyclictest	105055	-21	ntpq	07:40:24	0
96531	99	43	34,6	cyclictest	103472	-21	fschecks_count	07:35:23	1
96529	99	43	8,11	cyclictest	161448	-21	ssh	10:03:01	0
96529	99	43	7,12	cyclictest	242486	-21	df_inode	12:10:19	0
96529	99	43	6,14	cyclictest	120616	-21	ld	08:40:26	0
96529	99	43	37,4	cyclictest	137212	-21	kworker/u4:0	09:25:00	0
96529	99	43	36,5	cyclictest	109520	-21	cron	08:00:00	0
96529	99	43	35,6	cyclictest	187642	-21	grep	10:45:23	0
96529	99	43	12,5	cyclictest	127017	-21	ntpq	09:05:24	0
96531	99	42	33,7	cyclictest	104715	-21	df_abs	07:40:18	1
96529	99	42	35,4	cyclictest	0	-21	swapper/0	08:00:33	0
96531	99	41	33,6	cyclictest	163182	-21	switchtime	10:05:41	1
96531	99	40	32,5	cyclictest	203756	-21	aten2__	11:10:16	1
96531	99	40	31,6	cyclictest	0	-21	swapper/1	07:10:06	1
96529	99	40	25,11	cyclictest	98570	-21	ntpq	07:15:27	0
96529	99	40	25,10	cyclictest	121896	-21	ntpq	08:45:23	0
96529	99	39	30,6	cyclictest	0	-21	swapper/0	12:01:20	0
96529	99	39	21,14	cyclictest	116778	-21	ntpq	08:25:40	0
96529	99	31	21,7	cyclictest	96663	-21	latency_hist	07:10:07	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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