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 Mar 08, 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
3009151	2	58	48,7	sleep5	0	-21	swapper/5	19:01:57	5
3009596	99	53	50,2	cyclictest	3338295	-21	kworker/u16:3+flush-8:0	22:19:16	4
3009596	99	53	50,2	cyclictest	3338295	-21	kworker/u16:3+flush-8:0	22:19:16	4
3009604	99	48	46,2	cyclictest	3457454	-21	kworker/u16:0+flush-8:0	22:49:45	6
3009604	99	41	39,2	cyclictest	3552538	-21	kworker/u16:3+events_unbound	00:28:46	6
3009604	99	41	39,2	cyclictest	3338295	-21	kworker/u16:3+events_unbound	22:09:02	6
3009604	99	40	38,2	cyclictest	3457498	-21	kworker/u16:5+events_unbound	22:37:46	6
3009604	99	40	38,2	cyclictest	3457454	-21	kworker/u16:0+events_unbound	00:06:33	6
3000112	2	40	3,31	sleep7	0	-21	swapper/7	18:59:18	7
3009604	99	39	37,2	cyclictest	3457454	-21	kworker/u16:0+events_unbound	23:40:43	6
3009604	99	39	37,2	cyclictest	3408477	-21	kworker/u16:1+events_unbound	22:56:06	6
3009604	99	39	37,2	cyclictest	3338295	-21	kworker/u16:3+events_unbound	22:27:54	6
3009298	2	39	29,7	sleep4	0	-21	swapper/4	19:04:04	4
3009608	99	38	33,4	cyclictest	3445143	-21	latency_hist	22:29:16	7
3009604	99	38	36,2	cyclictest	3648358	-21	kworker/u16:2+events_unbound	00:23:10	6
3009604	99	38	36,2	cyclictest	3600604	-21	kworker/u16:2+events_unbound	23:35:42	6
3009604	99	38	36,2	cyclictest	3538771	-21	kworker/u16:1+events_unbound	23:08:58	6
3009604	99	38	36,2	cyclictest	3408477	-21	kworker/u16:1+events_unbound	22:48:50	6
3009604	99	38	36,2	cyclictest	3290261	-21	kworker/u16:1+events_unbound	21:45:53	6
3009596	99	38	35,2	cyclictest	3648358	-21	kworker/u16:2+flush-8:0	00:24:26	4
3009596	99	38	35,2	cyclictest	3090021	-21	kworker/u16:4+flush-8:0	21:19:17	4
3009604	99	37	35,2	cyclictest	3552538	-21	kworker/u16:3+events_unbound	23:51:01	6
3009604	99	37	35,2	cyclictest	3266771	-21	kworker/u16:2+events_unbound	21:52:10	6
3009604	99	37	35,2	cyclictest	3223837	-21	kworker/u16:0+events_unbound	22:03:18	6
3009604	99	37	35,2	cyclictest	3223837	-21	kworker/u16:0+events_unbound	21:54:58	6
3009604	99	36	34,2	cyclictest	3648358	-21	kworker/u16:2+events_unbound	00:03:53	6
3009604	99	36	34,2	cyclictest	3526817	-21	kworker/u16:2+events_unbound	23:15:37	6
3009604	99	36	34,2	cyclictest	3223837	-21	kworker/u16:0+events_unbound	21:30:18	6
3009604	99	36	34,2	cyclictest	3223837	-21	kworker/u16:0+events_unbound	21:13:42	6
3009029	2	36	25,8	sleep6	0	-21	swapper/6	19:00:13	6
3009608	99	35	30,4	cyclictest	3242569	-21	latency_hist	21:04:16	7
3009604	99	35	33,2	cyclictest	3671806	-21	kworker/u16:5+events_unbound	00:12:37	6
3009604	99	35	33,2	cyclictest	3552538	-21	kworker/u16:3+flush-8:0	23:56:18	6
3009604	99	35	33,2	cyclictest	3552538	-21	kworker/u16:3+events_unbound	00:32:09	6
3009604	99	35	33,2	cyclictest	3538771	-21	kworker/u16:1+events_unbound	23:27:57	6
3009604	99	35	33,2	cyclictest	3371855	-21	kworker/u16:6+events_unbound	22:10:01	6
3009596	99	35	32,2	cyclictest	3526817	-21	kworker/u16:2+flush-8:0	23:14:37	4
3009596	99	35	31,3	cyclictest	3457454	-21	kworker/u16:0+flush-8:0	22:39:36	4
3009608	99	34	0,32	cyclictest	650	-21	systemd-journal	20:19:16	7
3009608	99	34	0,32	cyclictest	650	-21	systemd-journal	20:19:16	7
3009604	99	34	32,2	cyclictest	3538771	-21	kworker/u16:1+events_unbound	23:13:10	6
3009604	99	34	32,2	cyclictest	3457498	-21	kworker/u16:5+flush-8:0	22:40:01	6
3009604	99	34	32,2	cyclictest	3338295	-21	kworker/u16:3+events_unbound	22:23:16	6
3009596	99	34	32,2	cyclictest	3090021	-21	kworker/u16:4+flush-8:0	21:05:18	4
3009596	99	34	31,2	cyclictest	3648358	-21	kworker/u16:2+flush-8:0	00:29:21	4
3009608	99	33	30,2	cyclictest	3587769	-21	ssh	23:28:15	7
3009604	99	33	31,2	cyclictest	3290261	-21	kworker/u16:1+events_unbound	21:38:31	6
3009604	99	33	31,2	cyclictest	3290261	-21	kworker/u16:1+events_unbound	21:38:31	6
3009604	99	33	31,2	cyclictest	3223837	-21	kworker/u16:0+events_unbound	22:15:11	6
3009604	99	33	31,2	cyclictest	3223837	-21	kworker/u16:0+events_unbound	22:15:11	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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