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 Sun Dec 28, 2025 12:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2951306	2	46	35,8	sleep5	0	-21	swapper/5	07:04:50	5
2951898	99	45	39,5	cyclictest	3013785	-21	latency_hist	07:38:56	7
2951893	99	41	39,2	cyclictest	3324361	-21	kworker/u16:0+events_unbound	11:03:55	5
2951357	2	41	8,29	sleep7	0	-21	swapper/7	07:05:32	7
2951893	99	40	38,2	cyclictest	3488648	-21	kworker/u16:1+events_unbound	12:29:11	5
2951897	99	38	36,2	cyclictest	3343583	-21	kworker/u16:4+events_unbound	10:29:10	6
2951897	99	38	36,2	cyclictest	3343583	-21	kworker/u16:4+events_unbound	10:29:10	6
2951893	99	37	35,2	cyclictest	2965665	-21	kworker/u16:4+flush-8:0	07:23:56	5
2951533	2	37	27,7	sleep6	0	-21	swapper/6	07:08:04	6
2951893	99	35	33,2	cyclictest	3168949	-21	kworker/u16:0+events_unbound	09:08:55	5
3551274	2	34	0,1	chrt	0	-21	swapper/5	12:14:17	5
2951898	99	33	32,0	cyclictest	0	-21	swapper/7	07:19:24	7
2951893	99	33	31,2	cyclictest	3324361	-21	kworker/u16:0+events_unbound	11:58:50	5
2951898	99	31	30,0	cyclictest	0	-21	swapper/7	08:49:10	7
2951898	99	31	25,5	cyclictest	3188529	-21	latency_hist	09:08:56	7
2951897	99	31	29,2	cyclictest	3023644	-21	kworker/u16:4+flush-8:0	07:49:19	6
2951898	99	28	22,5	cyclictest	650	-21	systemd-journal	08:58:50	7
2951898	99	28	22,5	cyclictest	650	-21	systemd-journal	08:58:50	7
2951893	99	28	26,2	cyclictest	3352163	-21	kworker/u16:5+flush-8:0	11:18:55	5
2951891	99	28	25,2	cyclictest	3168998	-21	kworker/u16:4+flush-8:0	08:59:26	4
2951891	99	27	24,2	cyclictest	2685250	-21	kworker/u16:1+flush-8:0	08:19:13	4
2951381	2	27	17,7	sleep4	0	-21	swapper/4	07:05:54	4
2951898	99	26	23,2	cyclictest	0	-21	swapper/7	10:49:10	7
2951897	99	26	24,2	cyclictest	3324361	-21	kworker/u16:0+flush-8:0	10:54:10	6
2951897	99	26	23,2	cyclictest	3419998	-21	kworker/u16:2+events_unbound	11:09:08	6
2951893	99	26	24,2	cyclictest	3208309	-21	kworker/u16:1+flush-8:0	09:33:50	5
2951893	99	26	23,2	cyclictest	3285472	-21	kworker/u16:2+flush-8:0	10:03:56	5
2951898	99	25	20,4	cyclictest	3178799	-21	latency_hist	09:03:56	7
2951897	99	25	23,2	cyclictest	3419998	-21	kworker/u16:2+flush-8:0	11:19:22	6
2951897	99	25	23,2	cyclictest	3352163	-21	kworker/u16:5+events_unbound	10:49:20	6
2951893	99	25	23,2	cyclictest	3285472	-21	kworker/u16:2+flush-8:0	10:18:55	5
2951893	99	25	23,2	cyclictest	3061271	-21	kworker/u16:0+flush-8:0	08:44:18	5
2951891	99	25	22,2	cyclictest	3488648	-21	kworker/u16:1+events_unbound	11:54:09	4
2951898	99	24	18,5	cyclictest	3082734	-21	cut	08:14:11	7
2951897	99	24	22,2	cyclictest	2932349	-21	kworker/u16:3+events_unbound	08:53:50	6
2951897	99	24	21,2	cyclictest	2932349	-21	kworker/u16:3+events_unbound	08:58:57	6
2951893	99	24	22,2	cyclictest	3498283	-21	kworker/u16:3+events_unbound	12:19:10	5
2951891	99	24	22,2	cyclictest	3352163	-21	kworker/u16:5+flush-8:0	10:48:55	4
2951891	99	24	22,2	cyclictest	3265830	-21	kworker/u16:1+events_unbound	09:49:08	4
2951898	99	23	22,0	cyclictest	0	-21	swapper/7	11:34:09	7
2951898	99	23	17,5	cyclictest	3372502	-21	latency_hist	10:43:56	7
2951897	99	23	21,2	cyclictest	3061271	-21	kworker/u16:0+events_unbound	08:14:21	6
2951897	99	23	21,2	cyclictest	2685249	-21	kworker/u16:0+flush-8:0	07:13:50	6
2951893	99	23	21,2	cyclictest	3324361	-21	kworker/u16:0+events_unbound	10:54:17	5
2951893	99	23	21,2	cyclictest	3012815	-21	kworker/u16:2+events_unbound	07:34:27	5
2951891	99	23	21,2	cyclictest	3061271	-21	kworker/u16:0+flush-8:0	08:14:26	4
2951898	99	22	21,0	cyclictest	0	-21	swapper/7	08:44:22	7
2951898	99	22	0,21	cyclictest	650	-21	systemd-journal	10:38:55	7
2951897	99	22	20,2	cyclictest	3324361	-21	kworker/u16:0+events_unbound	10:59:12	6
2951893	99	22	20,2	cyclictest	3411626	-21	kworker/u16:1+events_unbound	11:04:19	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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