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 Dec 18, 2025 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1206337	2	53	43,7	sleep6	0	-21	swapper/6	19:06:59	6
1206515	2	52	17,30	sleep7	0	-21	swapper/7	19:09:32	7
1206362	2	40	29,8	sleep4	0	-21	swapper/4	19:07:21	4
1206504	2	39	28,8	sleep5	0	-21	swapper/5	19:09:22	5
1206824	99	35	33,2	cyclictest	1258780	-21	kworker/u16:1+flush-8:0	19:40:07	4
1206835	99	34	28,5	cyclictest	1666793	-21	latency_hist	23:04:37	7
1206835	99	34	28,5	cyclictest	1666793	-21	latency_hist	23:04:37	7
1206832	99	31	29,2	cyclictest	1793163	-21	kworker/u16:2+flush-8:0	00:14:37	6
1206832	99	31	29,2	cyclictest	1216318	-21	kworker/u16:2+events_unbound	19:29:53	6
1206824	99	31	29,2	cyclictest	1288582	-21	kworker/u16:4+flush-8:0	20:09:37	4
1206824	99	30	28,2	cyclictest	1734462	-21	kworker/u16:4+flush-8:0	00:04:37	4
1206832	99	29	27,2	cyclictest	1530586	-21	kworker/u16:3+events_unbound	22:00:38	6
1206832	99	29	27,2	cyclictest	1490858	-21	kworker/u16:4+flush-8:0	21:49:37	6
1206832	99	29	27,2	cyclictest	1288582	-21	kworker/u16:4+events_unbound	20:07:36	6
1206832	99	29	26,2	cyclictest	1793163	-21	kworker/u16:2+events_unbound	00:14:38	6
1206828	99	29	27,2	cyclictest	1657083	-21	kworker/u16:1+flush-8:0	22:59:51	5
1206828	99	29	27,2	cyclictest	1657083	-21	kworker/u16:1+flush-8:0	22:59:51	5
1206824	99	29	27,2	cyclictest	1490858	-21	kworker/u16:4+flush-8:0	21:54:37	4
1206824	99	29	27,2	cyclictest	1288352	-21	kworker/u16:3+events_unbound	19:59:34	4
1395697	2	28	0,1	chrt	1395698	-21	cat	20:44:49	6
1206835	99	28	27,0	cyclictest	0	-21	swapper/7	22:05:15	7
1206835	99	28	22,5	cyclictest	1462871	-21	latency_hist	21:19:37	7
1206828	99	28	26,2	cyclictest	1773283	-21	kworker/u16:2+events_unbound	23:58:50	5
1206824	99	28	26,2	cyclictest	1599130	-21	kworker/u16:0+flush-8:0	22:55:48	4
1206824	99	28	25,2	cyclictest	1278434	-21	kworker/u16:0+flush-8:0	21:19:39	4
1206835	99	27	21,5	cyclictest	1346406	-21	latency_hist	20:19:38	7
1206832	99	27	25,2	cyclictest	1336374	-21	kworker/u16:2+flush-8:0	20:13:36	6
1206832	99	27	24,2	cyclictest	1278434	-21	kworker/u16:0+events_unbound	20:24:58	6
1206828	99	27	25,2	cyclictest	1490858	-21	kworker/u16:4+flush-8:0	21:49:51	5
1206828	99	27	25,2	cyclictest	1278434	-21	kworker/u16:0+events_unbound	20:09:39	5
1206828	99	26	24,2	cyclictest	1803224	-21	kworker/u16:1+events_unbound	00:22:19	5
1206828	99	26	24,2	cyclictest	1599130	-21	kworker/u16:0+events_unbound	23:49:37	5
1206824	99	26	23,2	cyclictest	1345497	-21	kworker/u16:3+flush-8:0	20:59:38	4
1743994	2	25	0,0	chrt	1743997	-21	sed	23:40:05	7
1206835	99	25	25,0	cyclictest	0	-21	swapper/7	21:31:48	7
1206835	99	25	22,2	cyclictest	1618222	-21	turbostat	22:39:37	7
1206832	99	25	23,2	cyclictest	1745737	-21	kworker/u16:1+events_unbound	00:07:47	6
1206828	99	25	23,2	cyclictest	1821409	-21	kworker/u16:0+events_unbound	00:30:39	5
1206828	99	25	23,2	cyclictest	1634624	-21	kworker/u16:5+events_unbound	22:56:10	5
1206824	99	25	23,2	cyclictest	1258780	-21	kworker/u16:1+flush-8:0	19:46:48	4
1206824	99	25	22,2	cyclictest	1793163	-21	kworker/u16:2+events_unbound	00:14:47	4
1206835	99	24	23,0	cyclictest	0	-21	swapper/7	23:36:55	7
1206835	99	24	23,0	cyclictest	0	-21	swapper/7	22:09:38	7
1206835	99	24	23,0	cyclictest	0	-21	swapper/7	20:30:07	7
1206835	99	24	18,5	cyclictest	1851357	-21	latency_hist	00:39:37	7
1206832	99	24	22,2	cyclictest	1549916	-21	kworker/u16:5+events_unbound	22:24:07	6
1206832	99	24	22,2	cyclictest	1187301	-21	kworker/u16:1+flush-8:0	19:13:35	6
1206832	99	24	21,2	cyclictest	1599131	-21	kworker/u16:1+flush-8:0	22:34:38	6
1206828	99	24	22,2	cyclictest	1675563	-21	kworker/u16:2+events_unbound	23:40:39	5
1206828	99	24	22,2	cyclictest	1530506	-21	kworker/u16:2+flush-8:0	22:39:51	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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