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 50 highest latencies:

System rackbslot2.osadl.org (updated Thu Jan 01, 2026 12:44:40)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
276524	99	1224	1220,2	cyclictest	532964	-21	snmp_ryswitch.c	12:05:04	1
276038	2	228	199,19	sleep1	0	-21	swapper/1	07:06:11	1
276099	2	225	198,17	sleep0	0	-21	swapper/0	07:06:55	0
276218	2	224	194,19	sleep2	0	-21	swapper/2	07:08:24	2
276178	2	224	195,19	sleep3	0	-21	swapper/3	07:07:53	3
276524	99	95	0,92	cyclictest	411795	-21	/usr/share/muni	09:45:01	1
276536	99	66	53,1	cyclictest	463931	-13	chrome	10:45:01	3
276522	99	59	51,7	cyclictest	306518	-21	kworker/u8:2+events_unbound	09:05:15	0
276524	99	58	54,3	cyclictest	406920	-21	gpgv	09:40:01	1
276522	99	58	49,8	cyclictest	411337	-21	kworker/u8:0+events_unbound	09:50:13	0
276524	99	57	42,3	cyclictest	464024	-21	chrome	10:45:00	1
276522	99	57	48,8	cyclictest	306518	-21	kworker/u8:2+events_unbound	07:55:15	0
276532	99	51	47,3	cyclictest	306518	-21	kworker/u8:2+flush-179:0	08:55:09	2
276522	99	51	43,7	cyclictest	533261	-21	kworker/u8:1+events_unbound	12:35:13	0
276532	99	50	46,3	cyclictest	493635	-21	kworker/u8:1+flush-179:0	11:30:05	2
276532	99	49	46,2	cyclictest	498182	-21	kworker/u8:3+events_unbound	11:35:14	2
276532	99	49	45,3	cyclictest	250235	-21	kworker/u8:0+flush-179:0	07:30:14	2
276532	99	48	42,4	cyclictest	446865	-21	/usr/share/muni	10:25:01	2
276522	99	48	45,2	cyclictest	549549	-21	kworker/u8:3+flush-179:0	12:25:15	0
276522	99	48	41,6	cyclictest	485321	-21	kworker/u8:3+events_unbound	11:15:25	0
276536	99	47	43,3	cyclictest	306919	-21	latency_hist	07:45:02	3
276532	99	47	43,3	cyclictest	320743	-21	kworker/u8:1+flush-179:0	08:20:00	2
276524	99	47	32,12	cyclictest	425085	-21	/usr/share/muni	10:00:02	1
276522	99	47	39,7	cyclictest	293692	-21	kworker/u8:4+events_unbound	08:15:15	0
276532	99	44	41,2	cyclictest	551756	-21	apt-get	12:25:13	2
276532	99	44	40,3	cyclictest	411751	-21	CacheThread_Blo	09:45:01	2
276532	99	44	40,3	cyclictest	406527	-21	kworker/u8:2+flush-179:0	10:35:13	2
276522	99	44	40,3	cyclictest	263602	-21	kworker/u8:1+flush-179:0	07:20:10	0
276532	99	43	39,3	cyclictest	428790	-21	kworker/u8:3+flush-179:0	10:10:05	2
276532	99	42	39,2	cyclictest	466953	-21	kworker/u8:2+events_unbound	11:15:15	2
276532	99	42	37,4	cyclictest	298581	-21	/usr/share/muni	07:35:16	2
276532	99	42	36,5	cyclictest	558757	-21	/usr/share/muni	12:35:15	2
276524	99	42	38,3	cyclictest	472093	-21	kworker/u8:1+events_unbound	10:55:15	1
276522	99	42	38,3	cyclictest	487609	-21	ntpq	11:10:14	0
276522	99	42	37,4	cyclictest	386826	-21	ntpq	09:15:09	0
276536	99	41	39,1	cyclictest	1318	-21	snmpd	11:34:34	3
276536	99	41	37,3	cyclictest	367410	-21	ntpq	08:50:22	3
276532	99	41	37,3	cyclictest	389775	-21	kworker/u8:0+flush-179:0	09:30:10	2
276532	99	41	37,2	cyclictest	257439	-21	kworker/2:0+pm	08:45:12	2
276532	99	41	36,4	cyclictest	465449	-21	ThreadPoolForeg	10:45:11	2
276532	99	41	36,4	cyclictest	420510	-21	/usr/share/muni	09:55:04	2
276524	99	41	38,2	cyclictest	306518	-21	kworker/u8:2+flush-179:0	09:25:11	1
276524	99	41	37,3	cyclictest	478908	-21	cat	11:00:13	1
276522	99	41	38,2	cyclictest	4396	-1	kworker/0:1H+kblockd	10:24:15	0
276522	99	41	37,3	cyclictest	306518	-21	kworker/u8:2+flush-179:0	08:20:15	0
276536	99	40	36,3	cyclictest	359408	-21	CacheThread_Blo	08:45:01	3
276532	99	40	38,2	cyclictest	515265	-21	kworker/u8:0+events_unbound	11:50:13	2
276532	99	40	37,2	cyclictest	528239	-21	kworker/2:1+pm	12:30:01	2
276532	99	40	37,2	cyclictest	393609	-21	kworker/u8:1+events_unbound	09:40:16	2
276532	99	40	36,3	cyclictest	293692	-21	kworker/u8:4+events_unbound	08:05:08	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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