OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, 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.
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
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rack0slot2.osadl.org (updated Thu Jun 04, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2604221	2	67	40,8	sleep4	0	-21	swapper/4	07:04:04	4
2604707	99	49	47,2	cyclictest	2724092	-21	kworker/u16:3+flush-8:0	08:07:02	4
2604709	99	45	43,2	cyclictest	3080890	-21	kworker/u16:0+events_unbound	11:12:00	5
2604707	99	43	41,2	cyclictest	2724092	-21	kworker/u16:3+flush-8:0	08:52:04	4
2604709	99	42	39,2	cyclictest	3032231	-21	kworker/u16:2+events_unbound	10:46:41	5
2604713	99	41	39,2	cyclictest	2637540	-21	kworker/u16:4+events_unbound	07:26:38	6
2604707	99	41	39,2	cyclictest	2887836	-21	kworker/u16:0+events_unbound	10:17:44	4
2604707	99	41	39,2	cyclictest	2887836	-21	kworker/u16:0+events_unbound	10:17:44	4
2604707	99	41	39,2	cyclictest	2875318	-21	kworker/u16:2+events_unbound	09:33:36	4
2604707	99	41	39,2	cyclictest	2809503	-21	kworker/u16:1+events_unbound	09:43:09	4
2603062	2	41	3,31	sleep7	0	-21	swapper/7	07:02:06	7
2604707	99	39	37,2	cyclictest	3140449	-21	kworker/u16:2+events_unbound	11:25:05	4
2604707	99	39	37,2	cyclictest	3080890	-21	kworker/u16:0+events_unbound	11:20:36	4
2604707	99	38	36,2	cyclictest	3261409	-21	kworker/u16:1+events_unbound	12:35:56	4
2604707	99	38	36,2	cyclictest	2875318	-21	kworker/u16:2+events_unbound	10:01:09	4
2604707	99	38	36,2	cyclictest	2809503	-21	kworker/u16:1+events_unbound	09:49:41	4
2604715	99	37	34,1	cyclictest	2714254	-21	latency_hist	08:01:39	7
2604707	99	37	35,2	cyclictest	3164906	-21	kworker/u16:3+events_unbound	11:51:01	4
2604707	99	37	35,2	cyclictest	3140449	-21	kworker/u16:2+events_unbound	11:33:28	4
2604707	99	37	35,2	cyclictest	3140449	-21	kworker/u16:2+events_unbound	11:15:29	4
2604707	99	37	35,2	cyclictest	3092623	-21	kworker/u16:4+events_unbound	11:08:25	4
2604707	99	37	35,2	cyclictest	3068431	-21	kworker/u16:1+flush-8:0	10:45:24	4
2604707	99	37	35,2	cyclictest	3032231	-21	kworker/u16:2+events_unbound	10:49:08	4
2604707	99	37	35,2	cyclictest	2887836	-21	kworker/u16:0+flush-8:0	09:52:45	4
2604707	99	37	35,2	cyclictest	2887836	-21	kworker/u16:0+events_unbound	10:28:05	4
2604707	99	37	35,2	cyclictest	2809503	-21	kworker/u16:1+events_unbound	09:31:33	4
2604707	99	37	35,2	cyclictest	2724092	-21	kworker/u16:3+events_unbound	09:12:28	4
2604707	99	36	34,2	cyclictest	3164906	-21	kworker/u16:3+flush-8:0	11:45:08	4
2604707	99	36	34,2	cyclictest	3092623	-21	kworker/u16:4+events_unbound	11:06:08	4
2604707	99	36	34,2	cyclictest	2809503	-21	kworker/u16:1+events_unbound	10:13:28	4
2604707	99	36	34,2	cyclictest	2724092	-21	kworker/u16:3+events_unbound	09:18:45	4
2604713	99	35	33,2	cyclictest	3080890	-21	kworker/u16:0+flush-8:0	11:11:55	6
2604709	99	35	33,2	cyclictest	3249314	-21	kworker/u16:0+events_unbound	12:02:11	5
2604709	99	35	33,2	cyclictest	2809503	-21	kworker/u16:1+events_unbound	10:12:16	5
2604709	99	35	33,2	cyclictest	2809503	-21	kworker/u16:1+events_unbound	09:21:33	5
2604707	99	35	33,2	cyclictest	3298724	-21	kworker/u16:0+events_unbound	12:17:40	4
2604707	99	35	33,2	cyclictest	3140449	-21	kworker/u16:2+events_unbound	11:41:21	4
2604707	99	35	33,2	cyclictest	3140449	-21	kworker/u16:2+events_unbound	11:41:21	4
2604707	99	35	33,2	cyclictest	3032284	-21	kworker/u16:3+events_unbound	10:41:21	4
2604707	99	35	33,2	cyclictest	2809503	-21	kworker/u16:1+flush-8:0	10:08:32	4
2604393	2	35	24,8	sleep5	0	-21	swapper/5	07:06:29	5
2604709	99	34	32,2	cyclictest	2875318	-21	kworker/u16:2+flush-8:0	09:47:07	5
2604707	99	34	32,2	cyclictest	3249314	-21	kworker/u16:0+events_unbound	12:00:08	4
2604707	99	34	32,2	cyclictest	3092623	-21	kworker/u16:4+events_unbound	12:25:17	4
2604707	99	34	31,2	cyclictest	3261409	-21	kworker/u16:1+events_unbound	12:11:48	4
2604709	99	33	31,2	cyclictest	2541077	-21	kworker/u16:1+events_unbound	07:16:34	5
2604709	99	33	29,4	cyclictest	2541077	-21	kworker/u16:1+flush-8:0	07:41:38	5
2604707	99	33	31,2	cyclictest	3261409	-21	kworker/u16:1+events_unbound	12:28:13	4
2604707	99	33	31,2	cyclictest	3249314	-21	kworker/u16:0+events_unbound	12:07:44	4
2604707	99	33	31,2	cyclictest	3032284	-21	kworker/u16:3+events_unbound	10:33:20	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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