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 May 28, 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
3704297	2	51	41,7	sleep4	0	-21	swapper/4	19:03:52	4
3704815	99	49	47,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	23:22:29	6
3704336	2	49	13,31	sleep7	0	-21	swapper/7	19:04:27	7
3704813	99	48	46,2	cyclictest	83376	-21	kworker/u16:2+events_unbound	00:12:35	5
6280	89	43	0,36	rtkit-daemon	0	-21	swapper/5	19:02:45	5
3704823	99	43	38,4	cyclictest	3962978	-21	latency_hist	21:17:08	7
3704823	99	43	38,4	cyclictest	3962978	-21	latency_hist	21:17:08	7
3704813	99	42	39,2	cyclictest	83376	-21	kworker/u16:2+events_unbound	23:37:09	5
3704813	99	42	38,4	cyclictest	3622499	-21	kworker/u16:2+flush-8:0	20:07:08	5
3704813	99	41	38,2	cyclictest	3910299	-21	kworker/u16:1+flush-8:0	22:57:08	5
3704813	99	40	38,2	cyclictest	4168097	-21	kworker/u16:2+events_unbound	23:13:26	5
3704813	99	39	37,2	cyclictest	59025	-21	kworker/u16:0+events_unbound	23:30:22	5
3704813	99	39	37,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	22:58:10	5
3704813	99	39	37,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	22:40:50	5
3704813	99	39	37,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	00:33:41	5
3704813	99	39	37,2	cyclictest	3972685	-21	kworker/u16:3+events_unbound	21:25:14	5
3704813	99	38	36,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	23:24:25	5
3704813	99	38	36,2	cyclictest	3996858	-21	kworker/u16:0+events_unbound	21:31:19	5
3704813	99	37	35,2	cyclictest	4096008	-21	kworker/u16:3+flush-8:0	23:47:31	5
3704813	99	37	35,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	23:33:05	5
3704813	99	36	35,1	cyclictest	3910299	-21	kworker/u16:1+flush-8:0	23:57:45	5
3704813	99	36	34,2	cyclictest	4168097	-21	kworker/u16:2+events_unbound	22:49:14	5
3704813	99	36	34,2	cyclictest	4096008	-21	kworker/u16:3+flush-8:0	00:02:45	5
3704813	99	36	34,2	cyclictest	3996858	-21	kworker/u16:0+flush-8:0	21:52:50	5
3704813	99	36	34,2	cyclictest	3996858	-21	kworker/u16:0+flush-8:0	21:52:50	5
3704813	99	36	34,2	cyclictest	3996858	-21	kworker/u16:0+events_unbound	21:43:50	5
3704813	99	36	34,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	22:36:30	5
3704813	99	36	34,2	cyclictest	3727756	-21	kworker/u16:3+flush-8:0	19:32:08	5
3704813	99	35	33,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	23:54:05	5
3704813	99	35	33,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	23:43:30	5
3704813	99	35	33,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	23:20:30	5
3704813	99	35	33,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	00:18:13	5
3704813	99	35	33,2	cyclictest	3996858	-21	kworker/u16:0+events_unbound	22:22:49	5
3704813	99	35	33,2	cyclictest	3996858	-21	kworker/u16:0+events_unbound	21:41:49	5
3704813	99	35	33,2	cyclictest	3949484	-21	kworker/u16:2+events_unbound	22:04:50	5
3704813	99	35	33,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	22:09:10	5
3704813	99	35	33,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	21:35:18	5
3704813	99	35	33,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	00:11:33	5
3704813	99	35	33,2	cyclictest	226118	-21	kworker/u16:1+events_unbound	00:30:10	5
3704813	99	34	32,2	cyclictest	4168097	-21	kworker/u16:2+flush-8:0	23:07:41	5
3704813	99	34	32,2	cyclictest	4096008	-21	kworker/u16:3+flush-8:0	23:03:29	5
3704813	99	34	32,2	cyclictest	3949484	-21	kworker/u16:2+events_unbound	21:59:14	5
3704815	99	33	31,2	cyclictest	3622499	-21	kworker/u16:2+flush-8:0	19:22:09	6
3704813	99	33	31,2	cyclictest	4096008	-21	kworker/u16:3+flush-8:0	22:18:06	5
3704813	99	33	31,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	22:27:17	5
3704813	99	33	31,2	cyclictest	3949484	-21	kworker/u16:2+events_unbound	21:49:14	5
3704813	99	33	31,2	cyclictest	3891321	-21	kworker/u16:0+flush-8:0	21:19:54	5
3704813	99	33	31,2	cyclictest	3823677	-21	kworker/u16:4+events_unbound	21:08:06	5
3871786	2	32	0,1	chrt	3871788	-21	turbostat.cron	20:32:08	7
3704813	99	32	30,2	cyclictest	4168097	-21	kworker/u16:2+events_unbound	22:43:26	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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