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 Apr 19, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3015839	2	47	35,7	sleep5	0	-21	swapper/5	19:05:05	5
3022442	99	42	39,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	00:04:45	4
3021988	2	40	29,8	sleep4	0	-21	swapper/4	19:07:21	4
3013585	2	40	3,31	sleep7	0	-21	swapper/7	19:04:59	7
3022449	99	39	0,37	cyclictest	3689023	-21	ssh	00:06:42	7
3022442	99	37	35,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	22:01:57	4
3022449	99	36	35,0	cyclictest	0	-21	swapper/7	22:19:46	7
3022449	99	36	33,2	cyclictest	3676354	-21	ssh	00:00:41	7
3022442	99	36	34,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:49:38	4
3022442	99	36	34,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:22:01	4
3022442	99	36	34,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:39:42	4
3022442	99	36	34,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:39:42	4
3022442	99	36	34,2	cyclictest	3246856	-21	kworker/u16:3+events_unbound	21:28:34	4
3022442	99	36	33,2	cyclictest	3485501	-21	kworker/u16:3+events_unbound	23:04:45	4
3022449	99	35	34,0	cyclictest	0	-21	swapper/7	23:13:21	7
3022449	99	35	34,0	cyclictest	0	-21	swapper/7	22:44:45	7
3022449	99	35	30,4	cyclictest	3738889	-21	latency_hist	00:29:43	7
3022442	99	35	33,2	cyclictest	3750873	-21	kworker/u16:3+events_unbound	00:36:09	4
3022442	99	35	33,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:32:18	4
3022442	99	35	33,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:17:58	4
3022442	99	35	33,2	cyclictest	3688267	-21	kworker/u16:1+events_unbound	00:10:58	4
3022442	99	35	33,2	cyclictest	3667746	-21	kworker/u16:3+events_unbound	00:02:01	4
3022442	99	35	33,2	cyclictest	3546098	-21	kworker/u16:1+events_unbound	23:32:34	4
3022442	99	35	33,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:58:40	4
3022442	99	35	33,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:58:40	4
3022442	99	35	33,2	cyclictest	3413082	-21	kworker/u16:4+flush-8:0	22:55:21	4
3022442	99	35	33,2	cyclictest	3410808	-21	kworker/u16:0+events_unbound	22:42:46	4
3022442	99	35	33,2	cyclictest	3292248	-21	kworker/u16:0+events_unbound	21:59:41	4
3022442	99	35	33,2	cyclictest	3292248	-21	kworker/u16:0+events_unbound	21:51:40	4
3022442	99	35	33,2	cyclictest	3246856	-21	kworker/u16:3+events_unbound	21:47:18	4
3022449	99	34	29,3	cyclictest	3602946	-21	ntpq	23:30:08	7
3022442	99	34	33,1	cyclictest	3268252	-21	kworker/u16:4+events_unbound	21:19:33	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:41:53	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:17:37	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:17:37	4
3022442	99	34	32,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:01:49	4
3022442	99	34	32,2	cyclictest	3497468	-21	kworker/u16:5+events_unbound	22:53:41	4
3022442	99	34	32,2	cyclictest	3268252	-21	kworker/u16:4+events_unbound	21:21:42	4
3022442	99	34	32,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	22:15:52	4
3022442	99	34	32,2	cyclictest	3265022	-21	kworker/u16:2+events_unbound	21:40:49	4
3022442	99	34	32,2	cyclictest	3121965	-21	kworker/u16:0+events_unbound	21:11:48	4
3022442	99	34	32,2	cyclictest	3121965	-21	kworker/u16:0+events_unbound	21:11:48	4
3022449	99	33	28,4	cyclictest	635	-21	systemd-journal	20:59:44	7
3022442	99	33	31,2	cyclictest	3519191	-21	kworker/u16:0+events_unbound	23:13:45	4
3022442	99	33	31,2	cyclictest	3246856	-21	kworker/u16:3+events_unbound	21:33:06	4
3022449	99	32	31,0	cyclictest	0	-21	swapper/7	23:17:41	7
3022449	99	32	31,0	cyclictest	0	-21	swapper/7	23:17:41	7
3022442	99	32	30,2	cyclictest	3732386	-21	kworker/u16:2+events_unbound	00:27:25	4
3022442	99	32	30,2	cyclictest	3413082	-21	kworker/u16:4+events_unbound	23:54:41	4
3022442	99	32	30,2	cyclictest	3398508	-21	kworker/u16:3+events_unbound	22:11:40	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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