OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #2

Click here to display the system's profile data or here to proceed to next system.

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, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackbslot2.osadl.org (updated Tue Dec 16, 2025 12:44:41)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1070606	2	241	185,21	sleep2	0	-21	swapper/2	07:06:37	2
1070649	2	231	202,19	sleep0	0	-21	swapper/0	07:07:07	0
1070592	2	228	199,19	sleep3	0	-21	swapper/3	07:06:26	3
1070807	2	227	198,19	sleep1	0	-21	swapper/1	07:09:08	1
1071045	99	82	42,39	cyclictest	1256892	-13	chrome	10:45:01	0
1071049	99	58	55,2	cyclictest	1282675	-21	kworker/u8:0+events_unbound	11:25:05	1
1071051	99	57	52,4	cyclictest	1136160	-21	/usr/share/muni	08:25:13	2
1071051	99	54	43,10	cyclictest	1312414	-21	kworker/u8:0+flush-179:0	12:20:05	2
1071049	99	53	47,4	cyclictest	1153225	-21	CacheThread_Blo	08:45:01	1
1071055	99	52	48,3	cyclictest	1256892	-13	chrome	10:45:01	3
1071049	99	48	45,2	cyclictest	1312414	-21	kworker/u8:0+flush-179:0	11:55:13	1
1071055	99	47	43,3	cyclictest	1098489	-21	apt-get	07:40:06	3
1071049	99	47	44,2	cyclictest	1140062	-21	kworker/u8:1+flush-179:0	09:15:14	1
1213864	2	46	0,1	sleep3	1213819	-21	snmp_wlanpowerc	09:55:01	3
1071051	99	46	42,3	cyclictest	1118442	-21	kworker/u8:1+events_unbound	08:10:20	2
1071049	99	46	42,3	cyclictest	1282675	-21	kworker/u8:0+flush-179:0	11:20:00	1
1071049	99	46	34,11	cyclictest	1140062	-21	kworker/u8:1+flush-179:0	09:10:06	1
1071045	99	46	43,2	cyclictest	1024199	-21	kworker/u8:2+flush-179:0	07:35:04	0
1071049	99	45	41,3	cyclictest	1213580	-21	kworker/u8:3+events_unbound	10:05:15	1
1071045	99	45	42,2	cyclictest	1286991	-21	kworker/u8:3+events_unbound	11:30:05	0
1071055	99	44	37,5	cyclictest	1209510	-21	/usr/share/muni	09:50:01	3
1071051	99	44	41,2	cyclictest	1312414	-21	kworker/u8:0+flush-179:0	11:55:27	2
1071055	99	43	35,7	cyclictest	1288617	-21	ntpq	11:20:08	3
1071055	99	43	29,2	cyclictest	734829	-1	kworker/3:0H+kblockd	10:30:15	3
1071051	99	43	41,2	cyclictest	1273971	-21	kworker/u8:4+flush-179:0	11:10:05	2
1071051	99	43	40,2	cyclictest	1183227	-21	kworker/u8:2+flush-179:0	09:25:15	2
1071051	99	43	39,3	cyclictest	1024199	-21	kworker/u8:2+flush-179:0	07:15:16	2
1071049	99	43	40,2	cyclictest	1195907	-21	kworker/u8:0+events_unbound	10:10:06	1
1071049	99	43	40,2	cyclictest	1127292	-21	kworker/u8:2+events_unbound	08:55:16	1
1071045	99	43	40,2	cyclictest	1183227	-21	kworker/u8:2+flush-179:0	10:50:05	0
1071045	99	43	39,3	cyclictest	1145142	-21	kworker/u8:0+events_unbound	08:45:01	0
1071045	99	43	39,3	cyclictest	1084028	-21	kworker/u8:5+flush-179:0	07:55:06	0
1071051	99	42	39,2	cyclictest	1299683	-21	kworker/u8:2+flush-179:0	11:40:06	2
1071051	99	42	39,2	cyclictest	1299683	-21	kworker/u8:2+flush-179:0	11:40:06	2
1071049	99	42	39,2	cyclictest	1322049	-21	kworker/u8:3+flush-179:0	12:25:15	1
1071049	99	42	39,2	cyclictest	1299683	-21	kworker/u8:2+events_unbound	12:20:15	1
1071049	99	42	39,2	cyclictest	1097232	-21	kworker/u8:0+flush-179:0	08:05:20	1
1071049	99	42	39,2	cyclictest	1084028	-21	kworker/u8:5+flush-179:0	07:45:16	1
1071049	99	42	38,3	cyclictest	1312414	-21	kworker/u8:0+flush-179:0	12:15:05	1
1071045	99	42	38,3	cyclictest	1195907	-21	kworker/u8:0+flush-179:0	10:10:13	0
1071045	99	42	37,4	cyclictest	1322292	-21	/usr/share/muni	12:00:13	0
1071045	99	42	37,3	cyclictest	1239626	-21	munin-update	10:25:02	0
1071045	99	42	36,4	cyclictest	1317710	-21	latency_hist	11:55:00	0
1071051	99	41	39,1	cyclictest	1024199	-21	kworker/u8:2+events_unbound	07:25:05	2
1071051	99	41	38,2	cyclictest	1097232	-21	kworker/u8:0+flush-179:0	08:05:15	2
1071051	99	41	37,3	cyclictest	995130	-21	kworker/u8:0+flush-179:0	07:10:07	2
1071051	99	41	21,19	cyclictest	1195907	-21	kworker/u8:0+events_unbound	09:54:59	2
1071045	99	41	37,3	cyclictest	1195907	-21	kworker/u8:0+flush-179:0	10:15:05	0
1071055	99	40	27,9	cyclictest	1322293	-21	/usr/share/muni	12:00:02	3
1071055	99	40	24,14	cyclictest	1101738	-21	chrome	07:45:01	3
1071051	99	40	37,2	cyclictest	1321942	-21	kworker/2:2+pm	12:30:03	2
1071045	99	40	37,2	cyclictest	1251635	-21	kworker/u8:3+flush-179:0	10:40:05	0
1071055	99	39	34,3	cyclictest	734829	-1	kworker/3:0H+kblockd	08:25:04	3
1071055	99	39	34,3	cyclictest	1108096	-21	cat	07:50:14	3
1071055	99	39	28,9	cyclictest	1267367	-21	apt-get	10:55:13	3
1071051	99	39	37,1	cyclictest	1321942	-21	kworker/2:2+pm	12:25:57	2
1071051	99	39	37,1	cyclictest	1157078	-21	kworker/2:2+pm	09:06:03	2
1071051	99	39	37,1	cyclictest	1157078	-21	kworker/2:2+pm	08:54:18	2
1071051	99	39	37,1	cyclictest	1037380	-21	kworker/2:1+pm	07:50:14	2
1071051	99	39	36,3	cyclictest	1118442	-21	kworker/u8:1+events_unbound	08:20:01	2
1071051	99	39	36,2	cyclictest	1195959	-21	kworker/2:0+pm	10:00:11	2
1071051	99	39	36,2	cyclictest	1195907	-21	kworker/u8:0+flush-179:0	10:05:05	2
1071051	99	39	36,2	cyclictest	1157078	-21	kworker/2:2+pm	08:55:27	2
1071051	99	39	34,4	cyclictest	1335016	-21	/usr/share/muni	12:15:01	2
1071049	99	39	36,2	cyclictest	1235110	-21	kworker/u8:1+events_unbound	11:05:01	1
1071049	99	39	35,3	cyclictest	1195907	-21	kworker/u8:0+events_unbound	09:40:15	1
1071055	99	38	34,3	cyclictest	734829	-1	kworker/3:0H+kblockd	07:29:20	3
1071055	99	38	34,2	cyclictest	734829	-1	kworker/3:0H+kblockd	12:07:21	3
1071055	99	38	34,2	cyclictest	734829	-1	kworker/3:0H+kblockd	08:00:48	3
1071051	99	38	36,1	cyclictest	1195959	-21	kworker/2:0+pm	11:51:04	2
1071051	99	38	36,1	cyclictest	1195959	-21	kworker/2:0+pm	11:45:06	2
1071051	99	38	36,1	cyclictest	1195959	-21	kworker/2:0+pm	11:26:03	2
1071051	99	38	36,1	cyclictest	1195959	-21	kworker/2:0+pm	10:17:55	2
1071051	99	38	36,1	cyclictest	1157078	-21	kworker/2:2+pm	09:10:10	2
1071051	99	38	36,1	cyclictest	1157078	-21	kworker/2:2+pm	09:04:59	2
1071051	99	38	36,1	cyclictest	1037380	-21	kworker/2:1+pm	08:41:03	2
1071051	99	38	35,2	cyclictest	1282675	-21	kworker/u8:0+flush-179:0	11:15:15	2
1071051	99	38	35,2	cyclictest	1195959	-21	kworker/2:0+pm	10:40:02	2
1071051	99	38	35,2	cyclictest	1118442	-21	kworker/u8:1+events_unbound	08:20:09	2
1071051	99	38	35,2	cyclictest	1024842	-1	kworker/2:2H+kblockd	12:35:04	2
1071051	99	38	34,3	cyclictest	1140062	-21	kworker/u8:1+flush-179:0	09:15:10	2
1071049	99	38	36,2	cyclictest	1024199	-21	kworker/u8:2+flush-179:0	07:40:24	1
1071049	99	38	33,4	cyclictest	1084912	-21	ntpq	07:25:04	1
1071045	99	38	34,2	cyclictest	986220	-1	kworker/0:2H+kblockd	12:30:03	0
1071045	99	38	32,4	cyclictest	1244184	-21	/usr/share/muni	10:30:01	0
1071055	99	37	34,2	cyclictest	734829	-1	kworker/3:0H+kblockd	11:41:01	3
1071055	99	37	34,2	cyclictest	734829	-1	kworker/3:0H+kblockd	11:41:01	3
1071055	99	37	34,2	cyclictest	734829	-1	kworker/3:0H+kblockd	07:11:33	3
1071055	99	37	33,3	cyclictest	734829	-1	kworker/3:0H+kblockd	10:51:22	3
1071055	99	37	33,2	cyclictest	734829	-1	kworker/3:0H+kblockd	11:19:21	3
1071055	99	37	33,2	cyclictest	734829	-1	kworker/3:0H+kblockd	09:35:09	3
1071055	99	37	33,2	cyclictest	734829	-1	kworker/3:0H+kblockd	09:30:02	3
1071055	99	37	32,3	cyclictest	734829	-1	kworker/3:0H+kblockd	07:55:02	3
1071051	99	37	35,1	cyclictest	1321942	-21	kworker/2:2+pm	12:05:51	2
1071051	99	37	35,1	cyclictest	1195959	-21	kworker/2:0+pm	11:21:38	2
1071051	99	37	35,1	cyclictest	1195959	-21	kworker/2:0+pm	10:46:12	2
1071051	99	37	35,1	cyclictest	1037380	-21	kworker/2:1+pm	08:45:47	2
1071051	99	37	35,1	cyclictest	1037380	-21	kworker/2:1+pm	08:31:01	2
1071051	99	37	34,2	cyclictest	1195959	-21	kworker/2:0+pm	09:45:02	2
1071051	99	37	33,3	cyclictest	1084028	-21	kworker/u8:5+flush-179:0	08:35:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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