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 Sep 06, 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
3797259	2	60	49,8	sleep4	0	-21	swapper/4	19:06:38	4
3797174	2	55	19,31	sleep7	0	-21	swapper/7	19:05:29	7
3797438	2	45	35,7	sleep5	0	-21	swapper/5	19:09:12	5
3797745	99	41	35,5	cyclictest	648	-21	systemd-journal	23:49:17	7
3797745	99	40	35,4	cyclictest	206905	-21	latency_hist	23:39:17	7
3797745	99	37	31,5	cyclictest	3927897	-21	latency_hist	20:14:18	7
3797745	99	37	31,4	cyclictest	304498	-21	latency_hist	00:19:17	7
3797744	99	37	35,2	cyclictest	121754	-21	kworker/u16:2+events_unbound	00:01:52	6
3797744	99	36	34,2	cyclictest	12120	-21	kworker/u16:3+events_unbound	22:26:32	6
3797421	2	36	26,7	sleep6	0	-21	swapper/6	19:08:57	6
3797744	99	35	33,2	cyclictest	48630	-21	kworker/u16:1+events_unbound	22:41:44	6
3797744	99	35	33,2	cyclictest	121754	-21	kworker/u16:2+events_unbound	23:15:25	6
3797744	99	35	29,6	cyclictest	168068	-21	kworker/u16:4+events_unbound	23:20:07	6
3797744	99	34	32,2	cyclictest	4006004	-21	kworker/u16:0+events_unbound	22:35:21	6
3797744	99	34	32,2	cyclictest	3889316	-21	kworker/u16:4+events_unbound	20:28:24	6
3797745	99	33	28,4	cyclictest	4193251	-21	latency_hist	22:14:18	7
3797744	99	33	31,2	cyclictest	4006004	-21	kworker/u16:0+events_unbound	23:09:00	6
3797744	99	33	31,2	cyclictest	267888	-21	kworker/u16:0+events_unbound	00:24:15	6
3797744	99	33	31,2	cyclictest	194772	-21	kworker/u16:3+events_unbound	23:55:39	6
3797744	99	33	30,2	cyclictest	4132417	-21	kworker/u16:2+events_unbound	22:14:23	6
3797744	99	32	30,2	cyclictest	3798232	-21	kworker/u16:1+events_unbound	19:37:25	6
3797744	99	31	29,2	cyclictest	73432	-21	kworker/u16:2+events_unbound	22:46:04	6
3797744	99	31	29,2	cyclictest	4116996	-21	kworker/u16:4+events_unbound	21:51:52	6
3797744	99	31	29,2	cyclictest	4006004	-21	kworker/u16:0+events_unbound	21:55:00	6
3797744	99	31	29,2	cyclictest	3907640	-21	kworker/u16:5+events_unbound	20:01:16	6
3797744	99	31	29,2	cyclictest	3821251	-21	kworker/u16:2+events_unbound	19:27:25	6
3797744	99	31	29,2	cyclictest	3798232	-21	kworker/u16:1+events_unbound	19:20:25	6
3797744	99	31	29,2	cyclictest	267888	-21	kworker/u16:0+events_unbound	00:15:31	6
3797744	99	31	28,2	cyclictest	4006004	-21	kworker/u16:0+events_unbound	20:54:21	6
3797744	99	30	28,2	cyclictest	48630	-21	kworker/u16:1+events_unbound	23:49:33	6
3797744	99	30	28,2	cyclictest	4132417	-21	kworker/u16:2+events_unbound	22:01:33	6
3797744	99	29	27,2	cyclictest	3860971	-21	kworker/u16:2+events_unbound	20:31:25	6
3797744	99	29	27,2	cyclictest	121754	-21	kworker/u16:2+events_unbound	23:25:41	6
3797734	99	29	27,2	cyclictest	4072716	-21	kworker/u16:2+flush-8:0	21:25:02	4
3797744	99	28	26,2	cyclictest	85586	-21	kworker/u16:3+events_unbound	22:52:18	6
3797744	99	28	26,2	cyclictest	3907640	-21	kworker/u16:5+events_unbound	20:08:24	6
3797744	99	28	26,2	cyclictest	3880216	-21	kworker/u16:0+events_unbound	19:51:29	6
3797744	99	28	26,2	cyclictest	3840394	-21	kworker/u16:3+events_unbound	19:41:24	6
3797744	99	28	26,2	cyclictest	338876	-21	kworker/u16:1+events_unbound	00:37:10	6
3797744	99	28	26,2	cyclictest	267888	-21	kworker/u16:0+events_unbound	00:12:27	6
3797734	99	28	26,2	cyclictest	3798232	-21	kworker/u16:1+events_unbound	19:42:40	4
35726	2	28	0,1	chrt	35724	-21	ssh	22:28:01	7
3797744	99	27	25,2	cyclictest	3907640	-21	kworker/u16:5+events_unbound	20:11:37	6
3797744	99	27	25,2	cyclictest	194772	-21	kworker/u16:3+events_unbound	23:40:14	6
3797734	99	27	25,2	cyclictest	4006004	-21	kworker/u16:0+events_unbound	21:08:45	4
3797744	99	26	24,2	cyclictest	4043957	-21	kworker/u16:1+events_unbound	21:21:35	6
3797744	99	26	24,2	cyclictest	4006004	-21	kworker/u16:0+events_unbound	21:01:17	6
3797744	99	26	24,2	cyclictest	3889316	-21	kworker/u16:4+events_unbound	20:53:17	6
3797744	99	26	24,2	cyclictest	267888	-21	kworker/u16:0+events_unbound	00:32:27	6
3797744	99	26	24,2	cyclictest	267888	-21	kworker/u16:0+events_unbound	00:27:10	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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