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 Sat May 09, 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
2954286	2	59	0,1	sleep5	0	-21	swapper/5	10:44:47	5
2477140	99	45	42,2	cyclictest	2931865	-21	/usr/sbin/munin	10:38:22	7
2476786	2	44	32,8	sleep4	0	-21	swapper/4	07:07:32	4
2477136	99	42	39,2	cyclictest	2519410	-21	kworker/u16:2+flush-8:0	07:53:52	6
2476684	2	42	2,32	sleep7	0	-21	swapper/7	07:06:06	7
2477127	99	40	38,2	cyclictest	2990941	-21	kworker/u16:4+events_unbound	11:56:45	4
2477136	99	39	37,2	cyclictest	2835177	-21	kworker/u16:0+events_unbound	10:07:01	6
2477140	99	38	36,1	cyclictest	2966378	-21	ssh	10:49:28	7
2477140	99	38	36,1	cyclictest	2711756	-21	diskmemload	12:09:28	7
2477136	99	38	36,2	cyclictest	3112955	-21	kworker/u16:2+events_unbound	12:12:25	6
2477127	99	38	36,2	cyclictest	2567424	-21	kworker/u16:1+events_unbound	08:28:45	4
2477136	99	37	35,2	cyclictest	3015290	-21	kworker/u16:2+events_unbound	11:10:52	6
2477136	99	37	35,2	cyclictest	2835177	-21	kworker/u16:0+events_unbound	10:19:57	6
2477136	99	37	35,2	cyclictest	2772809	-21	kworker/u16:1+flush-8:0	10:55:24	6
2477136	99	37	35,2	cyclictest	2772809	-21	kworker/u16:1+events_unbound	10:30:17	6
2477136	99	37	35,2	cyclictest	2519410	-21	kworker/u16:2+flush-8:0	09:41:41	6
2477134	99	37	36,1	cyclictest	141	50	irq/27-ahci[0000:00:1f.2]	10:59:25	5
2477136	99	36	34,2	cyclictest	3112955	-21	kworker/u16:2+events_unbound	12:16:20	6
2477136	99	36	34,2	cyclictest	3078789	-21	kworker/u16:1+events_unbound	11:42:08	6
2477136	99	36	34,2	cyclictest	2835177	-21	kworker/u16:0+events_unbound	10:46:28	6
2477136	99	36	34,2	cyclictest	2772809	-21	kworker/u16:1+flush-8:0	09:51:45	6
2477136	99	36	34,2	cyclictest	2772809	-21	kworker/u16:1+events_unbound	09:58:21	6
2477136	99	36	34,2	cyclictest	2567424	-21	kworker/u16:1+events_unbound	08:28:47	6
2477136	99	36	33,2	cyclictest	3138769	-21	kworker/u16:0+events_unbound	12:19:00	6
2477127	99	36	34,2	cyclictest	3152087	-21	kworker/u16:1+events_unbound	12:09:37	4
2476721	2	36	26,7	sleep6	0	-21	swapper/6	07:06:37	6
2477140	99	35	34,0	cyclictest	0	-21	swapper/7	09:54:13	7
2477140	99	35	33,1	cyclictest	2992499	-21	ssh	11:02:12	7
2477140	99	35	32,2	cyclictest	2604485	-21	kthreadcore	08:08:45	7
2477140	99	35	31,3	cyclictest	2795109	-21	ssh	09:39:05	7
2477136	99	35	33,2	cyclictest	3138769	-21	kworker/u16:0+events_unbound	12:32:08	6
2477136	99	35	33,2	cyclictest	3078789	-21	kworker/u16:1+events_unbound	11:59:53	6
2477136	99	35	33,2	cyclictest	3015290	-21	kworker/u16:2+events_unbound	11:19:24	6
2477136	99	35	33,2	cyclictest	2835177	-21	kworker/u16:0+events_unbound	10:50:05	6
2477136	99	35	33,2	cyclictest	2772809	-21	kworker/u16:1+flush-8:0	09:37:25	6
2477136	99	35	33,2	cyclictest	2772809	-21	kworker/u16:1+events_unbound	10:40:52	6
2477136	99	35	33,2	cyclictest	2519410	-21	kworker/u16:2+events_unbound	09:27:25	6
2477127	99	35	32,2	cyclictest	2835177	-21	kworker/u16:0+events_unbound	10:18:25	4
2477136	99	34	32,2	cyclictest	2772809	-21	kworker/u16:1+events_unbound	10:35:45	6
2477127	99	34	32,2	cyclictest	2809183	-21	kworker/u16:3+events_unbound	10:18:00	4
2477127	99	34	32,2	cyclictest	2772809	-21	kworker/u16:1+flush-8:0	11:06:20	4
2477127	99	34	32,2	cyclictest	2772809	-21	kworker/u16:1+flush-8:0	11:06:20	4
2477127	99	34	32,2	cyclictest	2519410	-21	kworker/u16:2+flush-8:0	09:39:48	4
2477140	99	33	32,0	cyclictest	0	-21	swapper/7	11:20:32	7
2477140	99	33	32,0	cyclictest	0	-21	swapper/7	10:42:29	7
2477140	99	33	32,0	cyclictest	0	-21	swapper/7	10:00:48	7
2477140	99	33	31,1	cyclictest	2979059	-21	ssh	10:55:12	7
2477140	99	33	31,1	cyclictest	2857000	-21	ssh	10:05:29	7
2477140	99	33	30,1	cyclictest	3077869	-21	sh	11:36:41	7
2477136	99	33	31,2	cyclictest	3152087	-21	kworker/u16:1+events_unbound	12:36:55	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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