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 Sep 15, 2026 12:44:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1014367	99	120	112,6	cyclictest	1105496	-21	kworker/u4:5+events_unbound	10:24:51	0
1014367	99	113	104,7	cyclictest	1123433	-21	kworker/u4:14+events_unbound	10:49:59	0
1014367	99	95	88,5	cyclictest	1078611	-21	kworker/u4:13+events_unbound	09:59:44	0
1014367	99	91	72,15	cyclictest	53	-21	kswapd0	10:40:13	0
1014367	99	84	76,6	cyclictest	1194368	-21	kworker/u4:5+events_unbound	12:10:12	0
1014367	99	83	75,6	cyclictest	1149851	-21	kworker/u4:0+events_unbound	11:10:01	0
1014367	99	82	72,7	cyclictest	1149853	-21	kworker/u4:3+events_unbound	11:15:05	0
1014367	99	81	73,6	cyclictest	1154376	-21	kworker/u4:10+events_unbound	11:20:04	0
1014367	99	81	61,6	cyclictest	1194370	-21	kworker/u4:8+events_unbound	12:00:10	0
1014367	99	81	58,19	cyclictest	53	-21	kswapd0	09:35:10	0
1014367	99	81	58,19	cyclictest	53	-21	kswapd0	09:35:10	0
1014367	99	79	70,6	cyclictest	1101027	-21	kworker/u4:6+events_unbound	10:19:50	0
1014369	99	77	70,5	cyclictest	1065786	-21	kworker/u4:2+events_unbound	09:54:44	1
1014369	99	77	35,21	cyclictest	1166158	-21	ldconfig	11:25:31	1
1014367	99	74	67,5	cyclictest	1065785	-21	kworker/u4:1+events_unbound	10:09:47	0
1014367	99	73	66,5	cyclictest	1092091	-21	kworker/u4:18+events_unbound	10:04:48	0
1014367	99	73	65,6	cyclictest	1172461	-21	kworker/u4:9+events_unbound	11:45:09	0
1014369	99	72	23,39	cyclictest	1201553	-21	kernelversion	12:05:23	1
1014367	99	72	24,40	cyclictest	256	50	irq/23-42890000.ethernet	07:25:08	0
1014369	99	71	66,3	cyclictest	1189894	-21	kworker/u4:6+events_unbound	12:30:16	1
1014369	99	71	4,64	cyclictest	1054525	-21	ssh	09:20:12	1
1014369	99	69	27,24	cyclictest	0	-21	swapper/1	09:25:38	1
1014369	99	69	2,43	cyclictest	1195943	-21	ssh	11:59:41	1
1014369	99	68	1,42	cyclictest	1186222	-21	ssh	11:48:17	1
1014369	99	67	23,25	cyclictest	0	-21	swapper/1	11:20:38	1
1014369	99	66	3,57	cyclictest	1148125	-21	ssh	11:05:22	1
1014369	99	66	3,34	cyclictest	1021078	-21	apt-get	07:35:20	1
1014369	99	66	2,41	cyclictest	1075776	-21	ssh	09:43:48	1
1014369	99	65	31,31	cyclictest	0	-21	swapper/1	09:45:35	1
1014369	99	65	1,13	cyclictest	1176966	-21	ssh	11:37:47	1
1014369	99	65	1,12	cyclictest	1160490	-21	ssh	11:19:51	1
1014369	99	64	56,5	cyclictest	1198913	-21	kworker/u4:12+events_unbound	12:25:15	1
1014369	99	64	56,5	cyclictest	1198913	-21	kworker/u4:12+events_unbound	12:25:14	1
1014369	99	64	32,29	cyclictest	1086508	-21	ssh	09:55:34	1
1014369	99	64	2,57	cyclictest	1117460	-21	ssh	10:30:37	1
1014369	99	64	1,12	cyclictest	1071852	-21	ssh	09:39:37	1
1014369	99	64	1,12	cyclictest	1071852	-21	ssh	09:39:36	1
1014367	99	64	57,5	cyclictest	1101027	-21	kworker/u4:6+events_unbound	10:29:53	0
1014369	99	63	4,53	cyclictest	1126411	-21	ntpq	10:40:52	1
1014369	99	63	2,38	cyclictest	1104944	-21	ssh	10:16:08	1
1014369	99	63	1,13	cyclictest	1189391	-21	ssh	11:51:21	1
1014369	99	62	3,51	cyclictest	1214345	-21	ssh	12:20:15	1
1014369	99	62	33,26	cyclictest	1032389	-21	systemd	08:19:23	1
1014369	99	62	33,26	cyclictest	0	-21	swapper/1	09:00:21	1
1014369	99	62	32,27	cyclictest	0	-21	swapper/1	10:25:22	1
1014369	99	62	2,35	cyclictest	1032607	-21	apt-get	08:20:14	1
1014369	99	62	1,13	cyclictest	1153360	-21	users	11:10:42	1
1014367	99	62	54,4	cyclictest	256	50	irq/23-42890000.ethernet	09:40:10	0
1014369	99	61	3,53	cyclictest	1046422	-21	ssh	09:10:38	1
1014369	99	60	3,52	cyclictest	1144002	-21	ssh	11:00:36	1
1014369	99	60	3,51	cyclictest	1206325	-21	ssh	12:10:40	1
1014369	99	60	27,30	cyclictest	0	-21	swapper/1	10:55:43	1
1014369	99	60	2,54	cyclictest	1028087	-21	ntpq	08:00:30	1
1014369	99	60	2,54	cyclictest	1028087	-21	ntpq	08:00:30	1
1014369	99	60	2,53	cyclictest	1179349	-21	ssh	11:40:23	1
1014367	99	60	52,6	cyclictest	1101024	-21	kworker/u4:3+events_unbound	10:14:48	0
1014367	99	60	51,7	cyclictest	1194367	-21	kworker/u4:3+events_unbound	12:20:15	0
1014367	99	60	49,8	cyclictest	1077948	-21	switchtime	09:45:37	0
1014369	99	59	38,19	cyclictest	1050477	-21	head	09:15:23	1
1014369	99	59	3,51	cyclictest	1064236	-21	ntpq	09:30:27	1
1014369	99	59	29,28	cyclictest	0	-21	swapper/1	10:05:02	1
1014369	99	59	2,52	cyclictest	1130553	-21	ntpq	10:45:31	1
1014369	99	59	2,52	cyclictest	1044091	-21	apt-get	09:05:14	1
1014369	99	59	1,53	cyclictest	1210708	-21	ssh	12:15:34	1
1014369	99	59	10,27	cyclictest	1093701	-21	ssh	10:04:13	1
1014367	99	59	52,5	cyclictest	1011858	-21	kworker/u4:10+events_unbound	07:44:16	0
1014367	99	59	51,6	cyclictest	1167916	-21	kworker/u4:0+events_unbound	11:35:06	0
1014369	99	58	23,26	cyclictest	1037487	-21	kworker/u4:16+rpciod	08:50:15	1
1014369	99	57	5,48	cyclictest	1227977	-21	ssh	12:35:19	1
1014369	99	57	2,52	cyclictest	1015105	-21	ntpq	07:10:29	1
1014369	99	57	2,51	cyclictest	1138290	-21	ssh	10:54:56	1
1014369	99	57	2,51	cyclictest	1042224	-21	ps	08:55:37	1
1014369	99	57	22,31	cyclictest	0	-21	swapper/1	07:30:50	1
1014369	99	57	20,33	cyclictest	1108129	-21	fschecks_time	10:20:20	1
1014369	99	57	1,52	cyclictest	1045206	-21	diskmemload	10:10:14	1
1014367	99	57	50,5	cyclictest	1118963	-21	kworker/u4:3+events_unbound	10:34:55	0
1014367	99	57	48,5	cyclictest	0	-21	swapper/0	09:30:30	0
1014367	99	57	45,9	cyclictest	1223260	-21	acpi	12:30:14	0
1014369	99	56	3,49	cyclictest	1029356	-21	ntpq	08:05:29	1
1014369	99	56	2,50	cyclictest	1036955	-21	ntpq	08:35:24	1
1014369	99	55	32,20	cyclictest	0	-21	swapper/1	07:15:11	1
1014369	99	55	25,27	cyclictest	0	-21	swapper/1	12:00:20	1
1014369	99	55	2,50	cyclictest	1024247	-21	ntpq	07:45:27	1
1014369	99	55	2,49	cyclictest	1026728	-21	ntpq	07:55:28	1
1014369	99	55	1,51	cyclictest	1023020	-21	ntpq	07:40:32	1
1014367	99	55	46,7	cyclictest	1027266	-21	systemd	07:59:20	0
1014369	99	54	3,47	cyclictest	1120994	-21	sh	10:35:17	1
1014369	99	54	2,49	cyclictest	1045206	-21	diskmemload	11:30:15	1
1014369	99	54	2,48	cyclictest	1039863	-21	sed	08:45:37	1
1014369	99	54	2,48	cyclictest	1039863	-21	sed	08:45:36	1
1014367	99	54	46,6	cyclictest	1031096	-21	kworker/u4:0+events_unbound	09:00:02	0
1014367	99	54	42,8	cyclictest	0	-21	swapper/0	11:50:34	0
1014369	99	53	3,47	cyclictest	1017657	-21	ntpq	07:20:27	1
1014369	99	53	3,45	cyclictest	1018451	-21	apt-get	07:25:18	1
1014369	99	53	2,45	cyclictest	1030572	-21	ntpq	08:10:23	1
1014369	99	52	1,48	cyclictest	1035128	-21	/usr/sbin/munin	08:30:42	1
1014369	99	52	1,47	cyclictest	1037714	-21	apt-get	08:40:12	1
1014369	99	52	11,38	cyclictest	1025941	-21	sed	07:50:39	1
1014367	99	51	42,7	cyclictest	1031097	-21	kworker/u4:2+events_unbound	08:25:01	0
1014369	99	50	2,45	cyclictest	1034472	-21	ntpq	08:25:29	1
1014367	99	50	6,26	cyclictest	1139419	-21	ssh	10:55:30	0
1014367	99	50	42,6	cyclictest	1231870	-21	grep	12:39:59	0
1014367	99	50	31,5	cyclictest	1054897	-21	fschecks_time	09:20:19	0
1014367	99	50	24,18	cyclictest	256	50	irq/23-42890000.ethernet	07:30:16	0
1014367	99	49	41,6	cyclictest	1210933	-21	switchtime	12:15:39	0
1014367	99	48	41,5	cyclictest	1205130	-21	idleruntime-cro	12:10:01	0
1014367	99	48	40,6	cyclictest	1050060	-21	aten2__	09:15:17	0
1014367	99	48	39,7	cyclictest	1134275	-21	aten2__	10:50:16	0
1014367	99	47	41,5	cyclictest	1029823	-21	kworker/u4:10+events_unbound	09:14:34	0
1014367	99	47	40,5	cyclictest	1178653	-21	sshd	11:40:06	0
1014367	99	47	40,5	cyclictest	1039759	-21	cat	08:45:35	0
1014367	99	47	40,5	cyclictest	1039759	-21	cat	08:45:35	0
1014367	99	47	1,37	cyclictest	1192757	-21	ntpq	11:55:28	0
1014369	99	46	2,40	cyclictest	1014393	-21	latency_hist	07:10:01	1
1014367	99	46	7,14	cyclictest	1219560	-21	ntp_offset	12:25:31	0
1014367	99	46	7,14	cyclictest	1219560	-21	ntp_offset	12:25:30	0
1014367	99	46	39,5	cyclictest	1036445	-21	aten2__	08:35:18	0
1014367	99	46	36,7	cyclictest	1028855	-21	aten_r7power_po	08:05:16	0
1014367	99	45	38,5	cyclictest	1082224	-21	proc_pri	09:50:38	0
1014367	99	45	37,5	cyclictest	1013089	-21	kworker/u4:11-rpciod	07:25:01	0
1014367	99	45	35,8	cyclictest	1028508	-21	unixbench_singl	08:00:40	0
1014367	99	45	35,8	cyclictest	1028508	-21	unixbench_singl	08:00:39	0
1014367	99	45	29,12	cyclictest	0	-21	swapper/0	11:30:32	0
1014367	99	45	28,3	cyclictest	1169501	-21	modprobe	11:30:00	0
1014367	99	44	3,9	cyclictest	1148457	-21	sshd	11:05:36	0
1014367	99	44	37,5	cyclictest	1059518	-21	sed	09:25:21	0
1014367	99	44	37,5	cyclictest	1031614	-21	fschecks_time	08:15:19	0
1014367	99	44	37,5	cyclictest	1024612	-21	unixbench_multi	07:45:36	0
1014367	99	44	35,7	cyclictest	1036226	-21	systemd	08:34:26	0
1014367	99	43	36,5	cyclictest	1044443	-21	gltestperf	09:05:20	0
1014367	99	43	36,5	cyclictest	1031137	-21	sh	08:15:01	0
1014367	99	43	36,5	cyclictest	1014366	-21	cyclictest	07:15:39	0
1014367	99	43	33,7	cyclictest	1031096	-21	kworker/u4:0-rpciod	09:00:20	0
1014367	99	43	32,8	cyclictest	0	-21	swapper/0	11:05:02	0
1014367	99	42	36,4	cyclictest	0	-21	swapper/0	07:54:18	0
1014367	99	42	33,7	cyclictest	1034749	-21	timerandwakeup	08:25:38	0
1014367	99	42	31,9	cyclictest	1110011	-21	kworker/u4:12+xprtiod	10:40:00	0
1014367	99	42	26,7	cyclictest	1034945	-21	kworker/u4:12+events_unbound	08:40:05	0
1014367	99	41	31,7	cyclictest	0	-21	swapper/0	07:10:37	0
1014367	99	40	32,6	cyclictest	0	-21	swapper/0	07:40:01	0
1014367	99	39	28,7	cyclictest	0	-21	swapper/0	07:10:00	0
1014367	99	38	30,6	cyclictest	1040356	-21	aten_r7power_po	08:50:17	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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