OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #b, slot #1

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance

Characteristics of the 50 highest latencies:

System rackbslot1.osadl.org (updated Fri Dec 19, 2025 12:44:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2906562	2	202	177,14	sleep2	0	-21	swapper/2	07:08:49	2
2906530	2	193	169,14	sleep0	0	-21	swapper/0	07:08:23	0
2906486	2	189	165,14	sleep1	0	-21	swapper/1	07:07:48	1
2906384	2	186	162,14	sleep3	0	-21	swapper/3	07:06:38	3
2906875	99	101	1,87	cyclictest	3125721	-21	chrome	10:45:01	0
2906881	99	67	63,3	cyclictest	3196172	-21	kworker/u8:0+flush-179:0	12:10:33	2
3207405	2	65	0,1	chrt	3207403	-21	snmp_ryswitch2.	12:00:02	0
2906881	99	63	58,4	cyclictest	3159651	-21	kworker/u8:1+events_unbound	11:20:10	2
2906881	99	58	54,3	cyclictest	2896015	-21	kworker/u8:3+events_unbound	08:00:11	2
2906875	99	58	51,5	cyclictest	2938017	-31	munin-html	07:35:52	0
2906881	99	56	52,3	cyclictest	3190832	-21	kworker/u8:4+events_unbound	12:15:15	2
2906881	99	56	51,4	cyclictest	3056951	-21	kworker/u8:1+flush-179:0	09:35:17	2
2906881	99	56	51,3	cyclictest	3045837	-21	kworker/u8:4+flush-179:0	10:00:00	2
2906881	99	56	50,4	cyclictest	3067349	-21	kworker/u8:0+flush-179:0	10:00:20	2
2906875	99	56	47,7	cyclictest	247561	-21	ThreadPoolForeg	08:35:19	0
2906881	99	55	51,3	cyclictest	3015075	-21	kworker/u8:3+flush-179:0	09:50:15	2
3069149	2	54	0,1	chrt	3069152	-21	sed	09:45:15	2
2906884	99	54	48,5	cyclictest	2912091	-21	/usr/share/muni	07:15:11	3
2906884	99	54	48,4	cyclictest	3191127	-21	latency_hist	11:45:01	3
2906875	99	54	48,4	cyclictest	2917565	-21	kworker/u8:0+flush-179:0	08:40:21	0
2906881	99	53	49,3	cyclictest	2896015	-21	kworker/u8:3+flush-179:0	07:30:11	2
2906881	99	53	47,4	cyclictest	2979987	-21	kworker/u8:1+flush-179:0	08:20:22	2
2906881	99	53	47,4	cyclictest	2906996	-21	/usr/share/muni	07:10:09	2
2906881	99	52	48,3	cyclictest	3141357	-21	kworker/u8:0+flush-179:0	11:35:15	2
2906881	99	52	47,4	cyclictest	2885404	-21	kworker/u8:1+events_unbound	07:15:01	2
2906881	99	52	46,4	cyclictest	3150923	-21	apt-get	11:05:12	2
2906881	99	52	44,3	cyclictest	3196172	-21	kworker/u8:0+flush-179:0	12:25:17	2
2906881	99	52	33,18	cyclictest	3164927	-21	kworker/u8:2+events_unbound	11:30:31	2
2906879	99	52	48,3	cyclictest	3196172	-21	kworker/u8:0+events_unbound	11:48:00	1
2906879	99	52	48,3	cyclictest	3196172	-21	kworker/u8:0+events_unbound	11:48:00	1
2906879	99	52	46,5	cyclictest	3125708	-13	Chrome_ChildIOT	09:35:16	1
2906875	99	52	0,51	cyclictest	3146498	-21	diskstats	11:00:19	0
2906881	99	51	47,3	cyclictest	3045837	-21	kworker/u8:4+events_unbound	10:30:29	2
2906881	99	51	46,4	cyclictest	3118495	-21	kworker/u8:1+flush-179:0	10:35:26	2
2906875	99	51	47,3	cyclictest	2946942	-21	kworker/u8:4+flush-179:0	07:55:21	0
2906875	99	51	45,4	cyclictest	2949125	-21	/usr/share/muni	07:50:14	0
2906881	99	50	45,4	cyclictest	3164927	-21	kworker/u8:2+events_unbound	11:45:14	2
2906881	99	50	45,4	cyclictest	3164927	-21	kworker/u8:2+events_unbound	11:45:14	2
2906881	99	50	45,3	cyclictest	3164927	-21	kworker/u8:2+events_unbound	12:00:20	2
2906884	99	49	45,3	cyclictest	3045837	-21	kworker/u8:4+flush-179:0	09:30:32	3
2906881	99	49	46,2	cyclictest	3237402	-21	kworker/u8:3+flush-179:0	12:30:12	2
2906881	99	49	46,2	cyclictest	3015075	-21	kworker/u8:3+flush-179:0	09:25:17	2
2906881	99	49	45,3	cyclictest	3217270	-21	kworker/u8:1+flush-179:0	12:35:29	2
2906881	99	49	45,3	cyclictest	3015075	-21	kworker/u8:3+flush-179:0	09:00:26	2
2906881	99	49	45,3	cyclictest	2917565	-21	kworker/u8:0+events_unbound	08:50:09	2
2906881	99	49	45,3	cyclictest	2917565	-21	kworker/u8:0+events_unbound	08:50:08	2
2906881	99	49	44,4	cyclictest	2927802	-21	kworker/u8:2+flush-179:0	07:35:08	2
2906881	99	49	42,5	cyclictest	2938701	-21	/usr/share/muni	07:40:08	2
2906879	99	49	46,2	cyclictest	3141357	-21	kworker/u8:0+flush-179:0	11:35:32	1
2906879	99	49	45,3	cyclictest	3118588	-21	kworker/u8:2+events_unbound	10:35:25	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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