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 Tue Mar 17, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2558405	2	99	0,0	sleep7	2558406	-21	rm	21:19:16	7
2280337	99	59	56,2	cyclictest	2904781	-21	kworker/u16:0+flush-8:0	00:13:40	5
2279730	2	58	47,7	sleep5	0	-21	swapper/5	18:59:17	5
2279823	2	57	47,7	sleep4	0	-21	swapper/4	19:00:28	4
2280342	99	54	52,1	cyclictest	2357019	-21	kworker/u16:3+events_unbound	21:48:53	6
2280337	99	47	44,2	cyclictest	2941275	-21	kworker/u16:3+flush-8:0	00:23:57	5
2280337	99	46	43,2	cyclictest	2417669	-21	kworker/u16:1+flush-8:0	22:48:57	5
2280342	99	45	42,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	23:28:58	6
2280342	99	44	41,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	22:48:41	6
2280332	99	43	37,5	cyclictest	2986213	-21	kworker/u16:2+flush-8:0	00:28:50	4
2279806	2	43	3,36	sleep7	0	-21	swapper/7	19:00:15	7
2524215	2	40	0,0	sleep7	2524216	-21	ssh	21:07:06	7
2280033	2	40	29,7	sleep6	0	-21	swapper/6	19:03:27	6
2855522	2	39	0,1	chrt	2855523	-21	sh	23:24:27	7
2280337	99	38	35,2	cyclictest	2904781	-21	kworker/u16:0+events_unbound	00:13:53	5
2280337	99	38	35,2	cyclictest	2242041	-21	kworker/u16:0+flush-8:0	19:24:06	5
2280342	99	37	35,2	cyclictest	2417669	-21	kworker/u16:1+events_unbound	20:53:40	6
2280337	99	36	33,2	cyclictest	2608153	-21	kworker/u16:0+events_unbound	21:53:55	5
2280342	99	33	31,2	cyclictest	2436946	-21	kworker/u16:2+flush-8:0	20:38:41	6
2280342	99	33	31,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	21:43:40	6
2280342	99	33	31,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	21:43:40	6
2280346	99	32	26,5	cyclictest	650	-21	systemd-journal	23:18:40	7
2280342	99	32	29,2	cyclictest	2941275	-21	kworker/u16:3+flush-8:0	00:24:09	6
2280337	99	32	31,1	cyclictest	2357019	-21	kworker/u16:3+events_unbound	21:14:01	5
2280346	99	31	26,4	cyclictest	2584369	-21	latency_hist	21:33:40	7
2280342	99	31	29,2	cyclictest	2774183	-21	kworker/u16:2+flush-8:0	23:54:10	6
2280342	99	31	28,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	19:48:58	6
2716753	2	30	0,1	chrt	2716756	-21	irqcore	22:28:57	7
2280342	99	30	27,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	21:58:46	6
2763327	2	29	0,1	chrt	2763329	-21	cpuspeed_turbos	22:48:53	7
2280342	99	29	26,2	cyclictest	2762828	-21	kworker/u16:0+flush-8:0	22:53:56	6
2280337	99	29	27,2	cyclictest	838109	-21	kworker/u16:4+events_unbound	19:04:10	5
2280337	99	29	27,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	21:18:55	5
2280337	99	29	26,2	cyclictest	2519464	-21	kworker/u16:4+flush-8:0	21:43:46	5
2280337	99	29	26,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	20:04:07	5
2280346	99	28	22,5	cyclictest	650	-21	systemd-journal	21:13:40	7
2280342	99	27	25,2	cyclictest	2904781	-21	kworker/u16:0+events_unbound	00:33:35	6
2280342	99	27	24,3	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	20:29:07	6
2280337	99	27	25,2	cyclictest	2762828	-21	kworker/u16:0+events_unbound	22:54:05	5
2280342	99	26	25,1	cyclictest	2357019	-21	kworker/u16:3+events_unbound	23:39:18	6
2280342	99	26	24,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	21:33:57	6
2280337	99	26	24,2	cyclictest	2417669	-21	kworker/u16:1+flush-8:0	20:13:57	5
2280337	99	26	24,2	cyclictest	2242041	-21	kworker/u16:0+flush-8:0	19:19:08	5
2280337	99	26	23,3	cyclictest	2436946	-21	kworker/u16:2+flush-8:0	20:33:58	5
2280342	99	25	23,2	cyclictest	2357019	-21	kworker/u16:3+events_unbound	21:18:57	6
2280342	99	24	22,2	cyclictest	2357019	-21	kworker/u16:3+flush-8:0	20:59:11	6
2280337	99	24	22,2	cyclictest	2904781	-21	kworker/u16:0+flush-8:0	00:03:46	5
2280337	99	24	22,2	cyclictest	2762828	-21	kworker/u16:0+events_unbound	22:58:58	5
2280337	99	24	22,2	cyclictest	2762828	-21	kworker/u16:0+events_unbound	22:58:58	5
2280346	99	23	1,21	cyclictest	984	-21	gmain	21:28:41	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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