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 Mon Apr 13, 2026 00:43:41)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3963667	2	146	0,1	sleep7	3963665	-21	ntpq	22:27:19	7
3754371	2	96	0,1	sleep5	0	-21	swapper/5	21:02:13	5
3516624	99	53	51,2	cyclictest	3833954	-21	kworker/u16:1+events_unbound	21:37:19	4
3516624	99	52	50,2	cyclictest	3870198	-21	kworker/u16:4+events_unbound	22:42:23	4
3516624	99	52	49,2	cyclictest	3488210	-21	kworker/u16:3+events_unbound	19:17:07	4
3516624	99	51	49,2	cyclictest	3870198	-21	kworker/u16:4+events_unbound	22:17:07	4
3516624	99	51	49,2	cyclictest	3488210	-21	kworker/u16:3+events_unbound	19:52:08	4
3516624	99	50	48,2	cyclictest	3833954	-21	kworker/u16:1+flush-8:0	21:47:09	4
3516624	99	50	48,2	cyclictest	3488210	-21	kworker/u16:3+events_unbound	21:22:08	4
3516326	2	50	40,7	sleep5	0	-21	swapper/5	19:01:39	5
3516624	99	49	48,1	cyclictest	3918456	-21	kworker/u16:0+events_unbound	22:32:10	4
3516318	2	48	38,7	sleep6	0	-21	swapper/6	19:01:32	6
3516624	99	47	46,1	cyclictest	3488210	-21	kworker/u16:3+flush-8:0	21:27:09	4
3516624	99	47	45,2	cyclictest	4181857	-21	kworker/u16:2+events_unbound	00:27:16	4
3516624	99	47	45,2	cyclictest	4112196	-21	kworker/u16:5+events_unbound	23:46:55	4
3516624	99	47	44,2	cyclictest	3783457	-21	kworker/u16:2+events_unbound	21:17:07	4
3516624	99	46	44,2	cyclictest	3991360	-21	kworker/u16:3+events_unbound	23:56:55	4
3516624	99	46	43,2	cyclictest	3488210	-21	kworker/u16:3+events_unbound	20:02:08	4
3516624	99	45	43,2	cyclictest	4015507	-21	kworker/u16:2+events_unbound	23:31:11	4
3516624	99	45	43,2	cyclictest	3870198	-21	kworker/u16:4+events_unbound	22:07:24	4
3516624	99	45	43,2	cyclictest	3673122	-21	kworker/u16:1+flush-8:0	21:11:53	4
3516624	99	45	43,2	cyclictest	3606316	-21	kworker/u16:4+events_unbound	20:47:23	4
3516624	99	45	43,2	cyclictest	3488210	-21	kworker/u16:3+flush-8:0	20:07:21	4
3516624	99	45	43,2	cyclictest	3488210	-21	kworker/u16:3+flush-8:0	20:07:21	4
3516624	99	44	42,2	cyclictest	3783457	-21	kworker/u16:2+events_unbound	21:52:08	4
3516624	99	43	41,2	cyclictest	4181857	-21	kworker/u16:2+events_unbound	00:17:28	4
3516624	99	43	41,2	cyclictest	3870198	-21	kworker/u16:4+flush-8:0	21:57:19	4
3516624	99	42	40,2	cyclictest	4181857	-21	kworker/u16:2+events_unbound	00:11:11	4
3516624	99	42	40,2	cyclictest	3673122	-21	kworker/u16:1+events_unbound	21:05:20	4
3516633	99	41	37,3	cyclictest	124	-21	kswapd0	00:17:07	7
3516624	99	41	39,2	cyclictest	3966856	-21	kworker/u16:1+events_unbound	22:48:31	4
3516624	99	41	39,2	cyclictest	3783457	-21	kworker/u16:2+events_unbound	21:15:59	4
3516624	99	41	39,2	cyclictest	14274	-21	kworker/u16:0+events_unbound	00:22:21	4
3516334	2	41	30,8	sleep4	0	-21	swapper/4	19:01:47	4
3516624	99	40	38,2	cyclictest	4061270	-21	kworker/u16:0+events_unbound	23:18:11	4
3516624	99	40	38,2	cyclictest	3870198	-21	kworker/u16:4+events_unbound	22:23:08	4
3516624	99	40	38,2	cyclictest	3606316	-21	kworker/u16:4+flush-8:0	20:17:21	4
3516624	99	40	38,2	cyclictest	3488210	-21	kworker/u16:3+events_unbound	22:14:40	4
3516624	99	40	38,2	cyclictest	3488210	-21	kworker/u16:3+events_unbound	22:14:40	4
3516624	99	40	37,2	cyclictest	4061270	-21	kworker/u16:0+events_unbound	23:24:11	4
3516624	99	40	37,2	cyclictest	3991360	-21	kworker/u16:3+flush-8:0	23:12:09	4
3516080	2	40	3,31	sleep7	0	-21	swapper/7	18:58:13	7
3516629	99	39	37,2	cyclictest	4112156	-21	kworker/u16:4+flush-8:0	23:32:23	6
3516629	99	39	37,2	cyclictest	4112156	-21	kworker/u16:4+flush-8:0	23:32:23	6
3516629	99	39	37,2	cyclictest	3488210	-21	kworker/u16:3+flush-8:0	22:12:24	6
3516629	99	39	37,2	cyclictest	3488210	-21	kworker/u16:3+flush-8:0	22:12:24	6
3516629	99	39	36,2	cyclictest	3488210	-21	kworker/u16:3+flush-8:0	21:26:48	6
3516624	99	39	37,2	cyclictest	4015507	-21	kworker/u16:2+flush-8:0	23:02:25	4
3516624	99	39	37,2	cyclictest	3991360	-21	kworker/u16:3+events_unbound	23:46:51	4
3516624	99	39	37,2	cyclictest	3991360	-21	kworker/u16:3+events_unbound	23:38:23	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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