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 Fri Dec 05, 2025 12:45:20)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4093729	2	225	195,20	sleep3	0	-21	swapper/3	07:08:16	3
4093728	2	225	174,18	sleep2	0	-21	swapper/2	07:08:15	2
4093747	2	224	197,18	sleep1	0	-21	swapper/1	07:08:30	1
4093651	2	222	184,29	sleep0	0	-21	swapper/0	07:07:14	0
4094053	99	78	74,2	cyclictest	4163264	-21	snmp_areswitch.	08:45:01	2
4094049	99	56	49,6	cyclictest	4173181	-21	kworker/u8:1+events_unbound	09:10:14	0
4094058	99	51	44,4	cyclictest	67902	-21	chrome	10:45:01	3
4094049	99	51	7,43	cyclictest	4106724	-21	kworker/u8:1+efi_rts_wq	08:46:44	0
4094049	99	51	49,1	cyclictest	67841	-13	chrome	10:45:01	0
4094049	99	48	45,2	cyclictest	41556	-21	kworker/u8:2+events_unbound	10:35:14	0
4094049	99	48	45,2	cyclictest	4101945	-21	kworker/u8:0+events_unbound	07:40:14	0
4094058	99	47	44,2	cyclictest	4083491	-21	kworker/u8:1+flush-179:0	07:15:26	3
4094058	99	47	44,2	cyclictest	4015263	-21	kworker/u8:2+events_unbound	07:25:09	3
4094052	99	47	44,2	cyclictest	8344	-21	kworker/u8:2+events_unbound	09:35:08	1
4094052	99	47	44,2	cyclictest	32771	-21	kworker/u8:1+events_unbound	10:10:12	1
4094049	99	47	44,2	cyclictest	4173181	-21	kworker/u8:1+events_unbound	09:20:13	0
4094049	99	46	44,2	cyclictest	4148589	-21	kworker/u8:3+flush-179:0	08:25:18	0
4094053	99	45	38,5	cyclictest	141232	-21	/usr/share/muni	12:10:04	2
4094053	99	45	37,4	cyclictest	58796	-21	kworker/2:2+pm	10:46:47	2
4094049	99	45	39,2	cyclictest	14760	-21	kworker/u8:0+events_unbound	10:15:09	0
4094058	99	44	41,2	cyclictest	4173181	-21	kworker/u8:1+flush-179:0	09:15:11	3
4094053	99	44	36,7	cyclictest	103793	-21	snmp_wlanpowerc	11:25:11	2
4094053	99	44	33,5	cyclictest	2414918	-1	kworker/2:0H+kblockd	09:45:14	2
4094053	99	44	1,2	cyclictest	49801	-31	munin-html	10:21:19	2
4094052	99	44	39,4	cyclictest	119762	-21	chrome	11:45:02	1
4094052	99	44	38,4	cyclictest	4130755	-21	latency_hist	08:00:00	1
4094049	99	44	37,2	cyclictest	4158435	-21	kworker/u8:0+events_unbound	08:40:05	0
4094049	99	44	33,3	cyclictest	4106724	-21	kworker/u8:1+events_unbound	08:05:08	0
4094058	99	43	41,2	cyclictest	149351	-21	kworker/u8:2+flush-179:0	12:20:15	3
4094053	99	43	29,12	cyclictest	4136953	-21	kworker/2:3+pm	08:16:33	2
4094052	99	43	40,2	cyclictest	4182488	-21	kworker/u8:0+flush-179:0	09:20:00	1
4094052	99	43	36,3	cyclictest	101953	-21	kworker/u8:3+flush-179:0	11:25:05	1
4094053	99	42	33,4	cyclictest	129602	-21	kworker/2:2+pm	12:30:05	2
4094058	99	41	38,2	cyclictest	49189	-21	kworker/u8:4+flush-179:0	10:50:06	3
4094058	99	41	38,2	cyclictest	4106724	-21	kworker/u8:1+events_unbound	08:05:15	3
4094058	99	41	38,2	cyclictest	106300	-21	kworker/u8:1+flush-179:0	11:35:11	3
4094053	99	41	38,2	cyclictest	4136953	-21	kworker/2:3+pm	09:25:21	2
4094053	99	41	38,2	cyclictest	4136953	-21	kworker/2:3+pm	09:16:34	2
4094052	99	41	35,5	cyclictest	166621	-21	latency_hist	12:40:01	1
4094053	99	40	37,2	cyclictest	69300	-21	kworker/2:1+pm	11:51:26	2
4094053	99	40	37,2	cyclictest	69300	-21	kworker/2:1+pm	11:16:38	2
4094053	99	40	37,2	cyclictest	69300	-21	kworker/2:1+pm	11:00:17	2
4094053	99	40	37,2	cyclictest	4136953	-21	kworker/2:3+pm	09:37:18	2
4094053	99	40	37,2	cyclictest	4136953	-21	kworker/2:3+pm	09:11:24	2
4094053	99	40	35,4	cyclictest	129602	-21	kworker/2:2+pm	12:16:35	2
4094053	99	40	35,4	cyclictest	129602	-21	kworker/2:2+pm	12:16:35	2
4094053	99	40	35,3	cyclictest	4166477	-21	/usr/share/muni	08:50:13	2
4094053	99	40	34,4	cyclictest	69300	-21	kworker/2:1+pm	11:32:02	2
4094053	99	40	34,4	cyclictest	4147958	-21	/usr/share/muni	08:25:09	2
4094052	99	40	36,3	cyclictest	53985	-21	kworker/u8:0+flush-179:0	10:55:05	1
4094052	99	40	36,3	cyclictest	4106724	-21	kworker/u8:1+flush-179:0	08:40:08	1
4094052	99	40	29,10	cyclictest	1318	-21	snmpd	11:42:23	1
4094049	99	40	37,2	cyclictest	4101945	-21	kworker/u8:0+events_unbound	08:20:13	0
4094049	99	40	36,3	cyclictest	97650	-21	kworker/u8:0+events_unbound	12:05:04	0
4094049	99	40	36,3	cyclictest	53985	-21	kworker/u8:0+events_unbound	10:45:00	0
4094049	99	40	35,4	cyclictest	97650	-21	kworker/u8:0+events_unbound	11:30:05	0
4094058	99	39	35,3	cyclictest	27829	-21	ntpq	09:55:24	3
4094058	99	39	35,3	cyclictest	27829	-21	ntpq	09:55:23	3
4094058	99	39	34,4	cyclictest	77713	-21	ntpq	10:55:08	3
4094058	99	39	34,3	cyclictest	4188602	-21	/usr/share/muni	09:20:09	3
4094053	99	39	37,1	cyclictest	4136953	-21	kworker/2:3+pm	09:31:16	2
4094053	99	39	36,2	cyclictest	69300	-21	kworker/2:1+pm	11:05:12	2
4094053	99	39	36,2	cyclictest	69300	-21	kworker/2:1+pm	10:51:38	2
4094053	99	39	36,2	cyclictest	4136953	-21	kworker/2:3+pm	09:06:50	2
4094053	99	39	36,2	cyclictest	4136953	-21	kworker/2:3+pm	08:10:03	2
4094053	99	39	36,2	cyclictest	4105926	-21	kworker/2:0+pm	07:45:19	2
4094053	99	39	36,2	cyclictest	37277	-21	kworker/2:1+pm	10:16:14	2
4094053	99	39	34,4	cyclictest	2414918	-1	kworker/2:0H+kblockd	07:37:54	2
4094053	99	39	34,4	cyclictest	129512	-21	apt-get	11:55:08	2
4094053	99	39	34,3	cyclictest	4136953	-21	kworker/2:3+pm	09:55:04	2
4094053	99	39	34,3	cyclictest	4136953	-21	kworker/2:3+pm	09:55:03	2
4094053	99	39	32,5	cyclictest	54042	-31	munin-html	10:26:25	2
4094053	99	39	28,8	cyclictest	4136953	-21	kworker/2:3+pm	08:41:13	2
4094053	99	39	0,14	cyclictest	124119	-21	snmp_ryswitch2.	11:50:01	2
4094052	99	39	35,3	cyclictest	59279	-21	/usr/share/muni	10:35:02	1
4094049	99	39	37,2	cyclictest	32771	-21	kworker/u8:1+events_unbound	10:25:25	0
4094049	99	39	37,1	cyclictest	1318	-21	snmpd	09:31:21	0
4094049	99	39	36,2	cyclictest	4162995	-21	kworker/u8:3+events_unbound	08:55:13	0
4094058	99	38	36,2	cyclictest	4106724	-21	kworker/u8:1+flush-179:0	07:35:05	3
4094058	99	38	35,2	cyclictest	97650	-21	kworker/u8:0+flush-179:0	12:05:10	3
4094053	99	38	36,1	cyclictest	58796	-21	kworker/2:2+pm	10:38:37	2
4094053	99	38	36,1	cyclictest	4136953	-21	kworker/2:3+pm	08:24:36	2
4094053	99	38	36,1	cyclictest	37277	-21	kworker/2:1+pm	10:10:16	2
4094053	99	38	36,1	cyclictest	129602	-21	kworker/2:2+pm	12:37:04	2
4094053	99	38	36,1	cyclictest	129602	-21	kworker/2:2+pm	12:21:39	2
4094053	99	38	35,2	cyclictest	69300	-21	kworker/2:1+pm	11:40:03	2
4094053	99	38	35,2	cyclictest	69300	-21	kworker/2:1+pm	11:21:38	2
4094053	99	38	35,2	cyclictest	4136953	-21	kworker/2:3+pm	08:37:08	2
4094053	99	38	35,1	cyclictest	4136953	-21	kworker/2:3+pm	09:40:15	2
4094053	99	38	34,2	cyclictest	4136953	-21	kworker/2:3+pm	08:30:08	2
4094053	99	38	32,4	cyclictest	2414918	-1	kworker/2:0H+kblockd	09:01:02	2
4094053	99	38	31,6	cyclictest	2414918	-1	kworker/2:0H+kblockd	10:06:16	2
4094049	99	38	36,2	cyclictest	97650	-21	kworker/u8:0+flush-179:0	11:40:06	0
4094049	99	38	36,1	cyclictest	4093625	-21	kworker/0:0+pm	08:10:26	0
4094049	99	38	35,2	cyclictest	32771	-21	kworker/u8:1+events_unbound	10:25:00	0
4094058	99	37	34,2	cyclictest	3737610	-1	kworker/3:0H+kblockd	09:41:25	3
4094053	99	37	9,26	cyclictest	58738	-31	munin-graph	10:31:34	2
4094053	99	37	35,1	cyclictest	4105926	-21	kworker/2:0+pm	08:01:31	2
4094053	99	37	35,1	cyclictest	4089496	-21	kworker/2:2+pm	07:16:15	2
4094053	99	37	34,2	cyclictest	4089496	-21	kworker/2:2+pm	07:20:10	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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