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 Thu Jun 25, 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
1832582	2	99	0,1	sleep7	1832578	-21	kthreadcore	11:44:46	7
1207929	2	64	52,8	sleep4	0	-21	swapper/4	07:07:41	4
1198780	2	64	53,7	sleep5	0	-21	swapper/5	07:04:30	5
1207932	2	54	20,29	sleep7	0	-21	swapper/7	07:07:44	7
1208356	99	47	40,6	cyclictest	1668543	-21	kworker/u16:1+events_unbound	10:54:29	6
1208354	99	44	42,2	cyclictest	1618752	-21	kworker/u16:2+flush-8:0	10:59:43	5
1208356	99	41	39,2	cyclictest	1693011	-21	kworker/u16:4+events_unbound	11:34:42	6
1208354	99	41	39,2	cyclictest	1878082	-21	kworker/u16:3+events_unbound	12:24:09	5
1208354	99	39	37,2	cyclictest	1766970	-21	kworker/u16:0+flush-8:0	11:24:57	5
1208354	99	38	36,2	cyclictest	1816244	-21	kworker/u16:1+events_unbound	12:32:33	5
1208354	99	38	36,2	cyclictest	1618753	-21	kworker/u16:3+events_unbound	10:33:10	5
1208354	99	38	36,2	cyclictest	1618752	-21	kworker/u16:2+events_unbound	10:20:58	5
1208354	99	37	35,2	cyclictest	1816244	-21	kworker/u16:1+flush-8:0	12:06:53	5
1208354	99	37	35,2	cyclictest	1792923	-21	kworker/u16:2+events_unbound	11:56:53	5
1208354	99	37	35,2	cyclictest	1693011	-21	kworker/u16:4+events_unbound	11:35:54	5
1208354	99	37	35,2	cyclictest	1618752	-21	kworker/u16:2+events_unbound	11:16:06	5
1208354	99	37	35,2	cyclictest	1471775	-21	kworker/u16:5+events_unbound	10:03:42	5
1208354	99	37	35,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:23:13	5
1208354	99	36	34,2	cyclictest	1816244	-21	kworker/u16:1+events_unbound	11:47:09	5
1208354	99	36	34,2	cyclictest	1693011	-21	kworker/u16:4+events_unbound	11:40:18	5
1208354	99	36	34,2	cyclictest	1693011	-21	kworker/u16:4+events_unbound	11:32:41	5
1208354	99	36	34,2	cyclictest	1471775	-21	kworker/u16:5+events_unbound	10:11:54	5
1208354	99	36	34,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:43:09	5
1208354	99	36	34,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:34:13	5
1208354	99	36	33,3	cyclictest	1643826	-21	kworker/u16:0+flush-8:0	10:58:57	5
1208356	99	35	33,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:25:18	6
1208354	99	35	33,2	cyclictest	1853541	-21	kworker/u16:0+events_unbound	12:01:09	5
1208354	99	35	33,2	cyclictest	1853541	-21	kworker/u16:0+events_unbound	12:01:09	5
1208354	99	35	33,2	cyclictest	1816244	-21	kworker/u16:1+events_unbound	11:51:54	5
1208354	99	35	33,2	cyclictest	1792923	-21	kworker/u16:2+events_unbound	12:18:13	5
1208354	99	35	33,2	cyclictest	1471775	-21	kworker/u16:5+events_unbound	10:17:34	5
1208354	99	35	33,2	cyclictest	1471775	-21	kworker/u16:5+events_unbound	10:06:01	5
1208354	99	35	33,2	cyclictest	1471775	-21	kworker/u16:5+events_unbound	09:38:53	5
1208354	99	35	33,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:56:42	5
1208354	99	35	33,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:56:42	5
1208354	99	35	33,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:45:57	5
1208354	99	35	33,2	cyclictest	1470926	-21	kworker/u16:2+events_unbound	09:26:26	5
1208354	99	35	32,2	cyclictest	1816244	-21	kworker/u16:1+events_unbound	12:36:02	5
1207824	2	35	25,7	sleep6	0	-21	swapper/6	07:06:15	6
1208362	99	34	28,5	cyclictest	1668191	-21	latency_hist	10:39:27	7
1208356	99	34	32,2	cyclictest	1878082	-21	kworker/u16:3+events_unbound	12:07:05	6
1208356	99	34	32,2	cyclictest	1693011	-21	kworker/u16:4+events_unbound	11:12:10	6
1208356	99	34	32,2	cyclictest	1643826	-21	kworker/u16:0+events_unbound	10:37:13	6
1208356	99	34	32,2	cyclictest	1532421	-21	kworker/u16:0+events_unbound	09:58:10	6
1208356	99	34	32,2	cyclictest	1532421	-21	kworker/u16:0+events_unbound	09:58:10	6
1208356	99	34	32,2	cyclictest	1471775	-21	kworker/u16:5+events_unbound	10:08:10	6
1208356	99	34	32,2	cyclictest	1376332	-21	kworker/u16:4+events_unbound	09:21:41	6
1208354	99	34	32,2	cyclictest	1926956	-21	kworker/u16:0+events_unbound	12:28:09	5
1208354	99	34	32,2	cyclictest	1853541	-21	kworker/u16:0+events_unbound	12:10:40	5
1208354	99	34	32,2	cyclictest	1693011	-21	kworker/u16:4+events_unbound	11:10:46	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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