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 Fri Mar 27, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2660466	99	55	52,2	cyclictest	2807792	-21	kworker/u16:0+events_unbound	20:53:15	5
2660459	99	55	53,2	cyclictest	3020801	-21	kworker/u16:2+events_unbound	23:13:16	4
2777564	2	54	0,5	sleep5	0	-21	swapper/5	19:58:26	5
2660471	99	54	52,2	cyclictest	2631729	-21	kworker/u16:1+events_unbound	19:13:23	6
2660466	99	54	52,2	cyclictest	2915278	-21	kworker/u16:1+events_unbound	21:18:31	5
2660471	99	52	50,2	cyclictest	3057352	-21	kworker/u16:5+flush-8:0	22:38:16	6
2660459	99	52	50,2	cyclictest	2874556	-21	kworker/u16:3+events_unbound	21:28:26	4
2660471	99	51	49,2	cyclictest	3250328	-21	kworker/u16:0+events_unbound	00:28:29	6
2660082	2	50	40,7	sleep4	0	-21	swapper/4	19:01:37	4
2660471	99	49	47,2	cyclictest	2631729	-21	kworker/u16:1+flush-8:0	19:08:35	6
2660459	99	49	46,2	cyclictest	3310626	-21	kworker/u16:3+events_unbound	00:18:17	4
2660459	99	49	46,2	cyclictest	3310626	-21	kworker/u16:3+events_unbound	00:18:17	4
2660459	99	48	46,2	cyclictest	3056930	-21	kworker/u16:0+events_unbound	22:33:15	4
2660459	99	47	45,2	cyclictest	3116893	-21	kworker/u16:4+events_unbound	22:58:31	4
2660459	99	47	45,2	cyclictest	3116893	-21	kworker/u16:4+events_unbound	22:58:31	4
2660471	99	46	44,2	cyclictest	3271984	-21	kworker/u16:2+events_unbound	00:13:28	6
2660471	99	46	44,2	cyclictest	3271984	-21	kworker/u16:2+events_unbound	00:13:28	6
2660471	99	46	44,2	cyclictest	3020801	-21	kworker/u16:2+events_unbound	22:23:34	6
2660471	99	46	44,2	cyclictest	2740677	-21	kworker/u16:4+events_unbound	19:48:26	6
2660471	99	45	43,2	cyclictest	3206795	-21	kworker/u16:3+events_unbound	23:43:14	6
2660471	99	45	43,2	cyclictest	2740677	-21	kworker/u16:4+events_unbound	19:53:31	6
2660459	99	45	42,2	cyclictest	3250328	-21	kworker/u16:0+events_unbound	23:58:23	4
2660471	99	44	42,2	cyclictest	2915278	-21	kworker/u16:1+events_unbound	21:18:24	6
2660471	99	44	42,2	cyclictest	2880047	-21	kworker/u16:4+events_unbound	21:44:31	6
2660466	99	44	42,2	cyclictest	3116893	-21	kworker/u16:4+events_unbound	22:58:27	5
2660466	99	44	42,2	cyclictest	3116893	-21	kworker/u16:4+events_unbound	22:58:27	5
2660466	99	44	42,2	cyclictest	2631729	-21	kworker/u16:1+events_unbound	19:38:16	5
2660459	99	44	42,2	cyclictest	3250329	-21	kworker/u16:4+flush-8:0	00:03:28	4
2660459	99	44	42,2	cyclictest	3225644	-21	kworker/u16:2+events_unbound	23:43:30	4
2660459	99	44	42,2	cyclictest	2631729	-21	kworker/u16:1+flush-8:0	20:03:27	4
2660459	99	44	42,2	cyclictest	2597818	-21	kworker/u16:2+events_unbound	19:23:27	4
2660471	99	43	41,2	cyclictest	3250328	-21	kworker/u16:0+events_unbound	00:00:38	6
2660471	99	43	41,2	cyclictest	3093231	-21	kworker/u16:1+events_unbound	23:48:29	6
2660471	99	43	41,2	cyclictest	3000165	-21	kworker/u16:0+flush-8:0	22:18:36	6
2660471	99	43	41,2	cyclictest	3000165	-21	kworker/u16:0+flush-8:0	22:18:36	6
2660471	99	43	41,2	cyclictest	2880047	-21	kworker/u16:4+events_unbound	22:12:51	6
2660466	99	43	41,2	cyclictest	3093231	-21	kworker/u16:1+events_unbound	23:48:19	5
2660459	99	43	41,2	cyclictest	3093231	-21	kworker/u16:1+events_unbound	23:56:59	4
2660459	99	43	41,2	cyclictest	3093231	-21	kworker/u16:1+events_unbound	23:25:35	4
2660459	99	43	41,2	cyclictest	3020801	-21	kworker/u16:2+flush-8:0	22:43:26	4
2660459	99	43	40,2	cyclictest	2915278	-21	kworker/u16:1+events_unbound	21:26:11	4
2660471	99	42	40,2	cyclictest	3116893	-21	kworker/u16:4+events_unbound	23:03:18	6
2660471	99	42	40,2	cyclictest	2880047	-21	kworker/u16:4+events_unbound	21:33:25	6
2660471	99	42	39,2	cyclictest	2880047	-21	kworker/u16:4+events_unbound	21:39:50	6
2660466	99	42	40,2	cyclictest	3286202	-21	kworker/u16:1+events_unbound	00:08:02	5
2660459	99	42	40,2	cyclictest	3310626	-21	kworker/u16:3+events_unbound	00:24:28	4
2660459	99	42	40,2	cyclictest	3116893	-21	kworker/u16:4+events_unbound	23:08:15	4
2660459	99	42	40,2	cyclictest	3093231	-21	kworker/u16:1+events_unbound	23:49:26	4
2660459	99	42	40,2	cyclictest	3057352	-21	kworker/u16:5+events_unbound	22:48:51	4
2660459	99	42	40,2	cyclictest	3020801	-21	kworker/u16:2+events_unbound	22:41:27	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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