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 Fri Mar 06, 2026 00:44:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1046126	99	121	108,11	cyclictest	1127224	-21	kworker/u4:9+events_unbound	22:42:49	0
1046126	99	88	82,4	cyclictest	1105961	-21	kworker/u4:18+events_unbound	21:52:42	0
1046126	99	88	80,6	cyclictest	1067816	-21	kworker/u4:8+events_unbound	20:37:34	0
1046126	99	88	76,6	cyclictest	1230134	-21	kworker/u4:0+events_unbound	00:08:05	0
1046126	99	84	68,12	cyclictest	54	-21	kswapd0	22:45:07	0
1046126	99	81	73,6	cyclictest	1170087	-21	kworker/u4:5+events_unbound	22:57:53	0
1046126	99	80	72,6	cyclictest	1092653	-21	kworker/u4:0+events_unbound	21:57:44	0
1046128	99	78	39,24	cyclictest	1046125	-21	cyclictest	00:10:33	1
1046126	99	78	2,63	cyclictest	1091156	-21	ssh	21:25:29	0
1046128	99	77	24,30	cyclictest	0	-21	swapper/1	23:05:29	1
1046128	99	77	24,30	cyclictest	0	-21	swapper/1	23:05:28	1
1046128	99	76	26,31	cyclictest	0	-21	swapper/1	21:15:29	1
1046126	99	75	68,5	cyclictest	1251241	-21	kworker/u4:1+events_unbound	00:33:07	0
1046126	99	74	62,8	cyclictest	1220171	-21	sh	23:55:38	0
1046128	99	73	25,25	cyclictest	0	-21	swapper/1	22:05:30	1
1046126	99	73	64,8	cyclictest	1066540	-21	kworker/u4:0+events_unbound	21:16:59	0
1046128	99	72	41,29	cyclictest	1219266	-21	/usr/sbin/munin	23:55:16	1
1046128	99	72	21,28	cyclictest	0	-21	swapper/1	23:50:12	1
1046126	99	72	64,6	cyclictest	1148954	-21	kworker/u4:7+events_unbound	22:32:46	0
1046128	99	70	60,8	cyclictest	54	-21	kswapd0	21:50:10	1
1046128	99	70	36,31	cyclictest	1147793	-21	unixbench_multi	22:30:41	1
1046128	99	70	34,32	cyclictest	1144596	-21	ssh	22:27:22	1
1046128	99	70	25,27	cyclictest	0	-21	swapper/1	23:00:35	1
1046128	99	70	2,50	cyclictest	1198539	-21	ssh	23:30:26	1
1046126	99	70	55,8	cyclictest	0	-21	swapper/0	22:20:12	0
1046128	99	69	62,5	cyclictest	1073013	-21	kworker/u4:1+events_unbound	21:12:40	1
1046128	99	69	3,14	cyclictest	1096471	-21	ssh	21:31:14	1
1046126	99	69	62,5	cyclictest	1066545	-21	kworker/u4:6+events_unbound	20:42:36	0
1046126	99	69	61,6	cyclictest	1191176	-21	kworker/u4:6+events_unbound	23:30:01	0
1046126	99	69	61,6	cyclictest	1178749	-21	kworker/u4:9+events_unbound	23:12:55	0
1046128	99	68	39,26	cyclictest	1052101	-21	ps	19:30:33	1
1046128	99	67	36,29	cyclictest	1117005	-21	gltestperf	21:55:21	1
1046126	99	67	58,7	cyclictest	1047347	-21	kworker/u4:5+events_unbound	19:15:00	0
1046128	99	66	4,56	cyclictest	1211576	-21	ssh	23:45:38	1
1046126	99	65	40,19	cyclictest	1223830	-21	fschecks_count	00:00:19	0
1046128	99	64	39,23	cyclictest	1224634	-21	timerwakeupswit	00:00:40	1
1046126	99	64	56,6	cyclictest	1051204	-21	kworker/u4:8+events_unbound	19:32:21	0
1046126	99	64	44,7	cyclictest	1242558	-21	kworker/u4:12+events_unbound	00:29:59	0
1046128	99	63	58,3	cyclictest	1058856	-21	kworker/u4:10+events_unbound	20:22:31	1
1046128	99	63	55,6	cyclictest	1079248	-21	kworker/u4:5+events_unbound	21:27:40	1
1046128	99	63	34,27	cyclictest	1202163	-21	aten2__	23:35:14	1
1046128	99	63	28,31	cyclictest	1253239	-21	ssh	00:35:03	1
1046126	99	63	55,6	cyclictest	1033635	-21	kworker/u4:7+events_unbound	19:37:23	0
1046128	99	62	3,7	cyclictest	1103304	-21	ssh	21:40:01	1
1046128	99	62	2,55	cyclictest	1253511	-21	ssh	00:35:15	1
1046128	99	62	23,35	cyclictest	0	-21	swapper/1	00:20:35	1
1046126	99	62	54,6	cyclictest	1191796	-21	kworker/u4:12+events_unbound	23:22:57	0
1046128	99	61	8,50	cyclictest	1184969	-21	ssh	23:15:11	1
1046128	99	61	7,50	cyclictest	1236309	-21	apt-get	00:15:20	1
1046128	99	61	31,27	cyclictest	0	-21	swapper/1	23:10:26	1
1046128	99	61	29,30	cyclictest	1164227	-21	kernelversion	22:50:20	1
1046128	99	61	29,29	cyclictest	1112041	-21	apt-key	21:50:02	1
1046128	99	61	27,27	cyclictest	0	-21	swapper/1	00:25:21	1
1046128	99	61	2,54	cyclictest	1207256	-21	ssh	23:40:34	1
1046126	99	61	47,5	cyclictest	1088197	-21	kworker/u4:6+events_unbound	21:22:52	0
1046128	99	60	52,5	cyclictest	1058856	-21	kworker/u4:10+events_unbound	20:30:02	1
1046128	99	60	30,27	cyclictest	1159094	-21	cron	22:45:00	1
1046128	99	60	28,30	cyclictest	0	-21	swapper/1	22:00:32	1
1046128	99	60	2,10	cyclictest	1151704	-21	ntpq	22:35:37	1
1046128	99	60	12,28	cyclictest	1197077	-21	ssh	23:29:13	1
1046128	99	59	4,50	cyclictest	1062213	-21	ntpq	20:10:26	1
1046128	99	59	36,20	cyclictest	1054239	-21	fschecks_count	19:40:19	1
1046128	99	59	17,37	cyclictest	1189332	-21	ssh	23:20:16	1
1046128	99	59	1,13	cyclictest	1138954	-21	ssh	22:20:42	1
1046126	99	59	51,6	cyclictest	1217137	-21	kworker/u4:5+events_unbound	23:53:03	0
1046128	99	58	28,27	cyclictest	0	-21	swapper/1	21:00:01	1
1046128	99	58	27,26	cyclictest	0	-21	swapper/1	22:45:33	1
1046128	99	58	10,45	cyclictest	1066542	-21	kworker/u4:3-rpciod	21:00:36	1
1046128	99	58	10,45	cyclictest	1066542	-21	kworker/u4:3-rpciod	21:00:36	1
1046126	99	58	45,7	cyclictest	1199854	-21	kworker/u4:14+events_unbound	23:36:40	0
1046126	99	58	39,16	cyclictest	1099232	-21	cut	21:35:17	0
1046128	99	57	2,18	cyclictest	1086789	-21	ssh	21:20:28	1
1046128	99	57	2,10	cyclictest	1227740	-21	apt-get	00:05:12	1
1046128	99	57	1,16	cyclictest	1133408	-21	ssh	22:15:00	1
1046128	99	57	1,16	cyclictest	1133408	-21	ssh	22:14:59	1
1046128	99	57	10,39	cyclictest	1066544	-21	kworker/u4:5-rpciod	20:50:11	1
1046126	99	57	50,5	cyclictest	1055044	-21	kworker/u4:9+events_unbound	19:44:46	0
1046126	99	57	46,5	cyclictest	1092654	-21	kworker/u4:2+events_unbound	21:49:43	0
1046126	99	57	40,13	cyclictest	54	-21	kswapd0	00:15:05	0
1046128	99	56	22,31	cyclictest	0	-21	swapper/1	22:55:20	1
1046128	99	56	2,16	cyclictest	1134409	-21	ntpq	22:15:27	1
1046128	99	55	24,29	cyclictest	0	-21	swapper/1	21:40:20	1
1046128	99	55	22,29	cyclictest	0	-21	swapper/1	19:50:21	1
1046128	99	55	1,14	cyclictest	1050834	-21	ps	19:25:35	1
1046128	99	55	11,41	cyclictest	1068	-21	snmpd	19:56:07	1
1046128	99	54	3,4	cyclictest	0	-21	swapper/1	20:15:13	1
1046128	99	54	2,14	cyclictest	1068654	-21	ntpq	20:35:32	1
1046128	99	54	2,13	cyclictest	1071328	-21	ntpq	20:45:35	1
1046126	99	54	46,5	cyclictest	1176953	-21	/usr/sbin/munin	23:05:21	0
1046126	99	54	46,5	cyclictest	1176953	-21	/usr/sbin/munin	23:05:20	0
1046128	99	53	2,6	cyclictest	1076324	-21	ntpq	21:05:25	1
1046128	99	53	25,26	cyclictest	0	-21	swapper/1	19:15:36	1
1046128	99	53	23,28	cyclictest	1049696	-21	switchtime	19:20:38	1
1046128	99	53	21,29	cyclictest	1066545	-21	kworker/u4:6+rpciod	20:30:17	1
1046128	99	53	18,31	cyclictest	0	-21	swapper/1	20:00:19	1
1046128	99	53	1,15	cyclictest	1060933	-21	ntpq	20:05:26	1
1046128	99	53	1,13	cyclictest	1069936	-21	ntpq	20:40:25	1
1046126	99	53	46,5	cyclictest	1221469	-21	kworker/u4:2+events_unbound	00:13:00	0
1046128	99	52	2,8	cyclictest	1055840	-21	ntpq	19:45:27	1
1046128	99	52	22,28	cyclictest	1055	-21	sshd	19:37:45	1
1046128	99	52	1,13	cyclictest	1046839	-21	ntpq	19:10:27	1
1046126	99	52	44,6	cyclictest	1124938	-21	latency_hist	22:05:02	0
1046126	99	52	44,6	cyclictest	1074344	-21	sendmail	21:00:01	0
1046126	99	51	43,6	cyclictest	1178748	-21	kworker/u4:8+events_unbound	23:20:00	0
1046126	99	51	43,6	cyclictest	1066544	-21	kworker/u4:5+events_unbound	20:52:36	0
1046126	99	50	42,6	cyclictest	1058858	-21	kworker/u4:13+events_unbound	20:02:27	0
1046126	99	50	41,7	cyclictest	1140282	-21	kworker/u4:12+events_unbound	22:27:44	0
1046126	99	50	39,9	cyclictest	1151033	-21	cpu	22:35:18	0
1046126	99	49	43,5	cyclictest	1242554	-21	kworker/u4:5+events_unbound	00:25:01	0
1046126	99	49	42,5	cyclictest	1092658	-21	kworker/u4:9+events_unbound	21:44:43	0
1046126	99	49	40,7	cyclictest	1199854	-21	kworker/u4:14+events_unbound	23:34:42	0
1046126	99	49	36,10	cyclictest	1046125	-21	cyclictest	21:13:09	0
1046126	99	49	28,18	cyclictest	0	-21	swapper/0	21:30:42	0
1046126	99	47	40,5	cyclictest	1070471	-21	kworker/u4:16+events_unbound	20:49:43	0
1046126	99	47	38,6	cyclictest	1212839	-21	kworker/u4:10-rpciod	23:50:00	0
1046126	99	47	38,6	cyclictest	1063828	-21	unixbench-2d	20:15:40	0
1046128	99	46	6,9	cyclictest	1046151	-21	sed	19:10:01	1
1046126	99	46	39,5	cyclictest	1254455	-21	grep	00:35:36	0
1046126	99	46	38,6	cyclictest	1210440	-21	latency_hist	23:45:01	0
1046126	99	46	29,8	cyclictest	1174440	-21	kworker/u4:6+events_unbound	23:02:30	0
1046126	99	45	38,5	cyclictest	1050375	-21	fschecks_count	19:25:18	0
1046126	99	45	37,5	cyclictest	1129762	-21	fschecks_time	22:10:20	0
1046126	99	45	37,5	cyclictest	1129762	-21	fschecks_time	22:10:19	0
1046126	99	45	37,5	cyclictest	1076941	-21	latency_hist	21:10:01	0
1046126	99	44	36,6	cyclictest	1134144	-21	gltestperf	22:15:18	0
1046126	99	44	35,7	cyclictest	1046211	-21	latency_hist	19:10:00	0
1046126	99	43	36,5	cyclictest	1125685	-21	uname	22:05:22	0
1046126	99	43	36,5	cyclictest	1058858	-21	kworker/u4:13+events_unbound	20:07:28	0
1046126	99	43	34,7	cyclictest	1057841	-21	aten_r7power_cu	19:55:15	0
1046126	99	43	34,6	cyclictest	1148953	-21	kworker/u4:4+events_unbound	22:52:50	0
1046126	99	42	35,5	cyclictest	1064496	-21	fschecks_time	20:20:19	0
1046126	99	42	35,5	cyclictest	1055042	-21	kworker/u4:4+events_unbound	20:14:46	0
1046126	99	42	35,5	cyclictest	1048543	-21	unixbench_multi	19:15:38	0
1046126	99	42	34,6	cyclictest	1055373	-21	aten_r7power_vo	19:45:16	0
1046126	99	42	32,8	cyclictest	1057589	-21	systemd	19:52:24	0
1046126	99	41	33,6	cyclictest	1049174	-21	fschecks_time	19:20:21	0
1046126	99	40	33,5	cyclictest	1066587	-21	munin-plugin-st	20:30:01	0
1046126	99	39	30,7	cyclictest	1074648	-21	aten_r7power_vo	21:00:17	0
1046126	99	39	30,7	cyclictest	1074648	-21	aten_r7power_vo	21:00:16	0
1046126	99	38	29,6	cyclictest	1066545	-21	kworker/u4:6+rpciod	20:30:41	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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