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 100 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
3704813	99	32	30,2	cyclictest	3727756	-21	kworker/u16:3+events_unbound	19:42:36	5
3704813	99	32	30,2	cyclictest	226118	-21	kworker/u16:1+events_unbound	00:23:10	5
3704823	99	31	30,0	cyclictest	0	-21	swapper/7	00:22:33	7
3704813	99	31	29,2	cyclictest	3833656	-21	kworker/u16:1+flush-8:0	20:12:36	5
3704813	99	31	29,2	cyclictest	3622499	-21	kworker/u16:2+events_unbound	19:52:38	5
3704809	99	31	29,2	cyclictest	4096008	-21	kworker/u16:3+flush-8:0	23:17:33	4
3704813	99	30	28,2	cyclictest	3949484	-21	kworker/u16:2+events_unbound	22:14:54	5
3704813	99	30	28,2	cyclictest	3891321	-21	kworker/u16:0+events_unbound	21:15:10	5
3704813	99	30	28,2	cyclictest	3891321	-21	kworker/u16:0+events_unbound	21:15:10	5
3704823	99	29	28,0	cyclictest	0	-21	swapper/7	21:42:22	7
3704823	99	29	28,0	cyclictest	0	-21	swapper/7	19:22:34	7
3704823	99	29	28,0	cyclictest	0	-21	swapper/7	19:17:31	7
3704815	99	29	27,2	cyclictest	226118	-21	kworker/u16:1+flush-8:0	00:27:03	6
3704815	99	29	26,2	cyclictest	3996858	-21	kworker/u16:0+flush-8:0	22:27:09	6
3704813	99	29	27,2	cyclictest	3727756	-21	kworker/u16:3+events_unbound	20:17:11	5
3704823	99	28	26,1	cyclictest	0	-21	swapper/7	21:02:29	7
3704823	99	28	23,4	cyclictest	635	-21	systemd-journal	22:57:03	7
3704815	99	28	26,2	cyclictest	3996858	-21	kworker/u16:0+flush-8:0	21:52:26	6
3704815	99	28	26,2	cyclictest	3996858	-21	kworker/u16:0+flush-8:0	21:52:26	6
3704813	99	28	26,2	cyclictest	3704590	-21	kworker/u16:1+events_unbound	19:38:18	5
3704815	99	27	24,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	22:47:25	6
3704813	99	27	26,1	cyclictest	3823677	-21	kworker/u16:4+events_unbound	20:57:07	5
4044148	2	26	0,1	chrt	4044149	-21	needreboot	21:47:32	7
3704823	99	26	25,0	cyclictest	0	-21	swapper/7	23:02:31	7
3704813	99	26	24,2	cyclictest	3823677	-21	kworker/u16:4+events_unbound	20:26:17	5
3704809	99	26	24,2	cyclictest	3823677	-21	kworker/u16:4+events_unbound	21:07:23	4
3704401	2	26	16,7	sleep6	0	-21	swapper/6	19:05:22	6
3704823	99	25	24,0	cyclictest	0	-21	swapper/7	22:07:33	7
3704813	99	25	23,2	cyclictest	3785355	-21	kworker/u16:0+events_unbound	19:57:10	5
3704815	99	24	22,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	21:47:37	6
3704809	99	24	22,2	cyclictest	4096008	-21	kworker/u16:3+events_unbound	00:32:23	4
3704809	99	24	22,2	cyclictest	3910299	-21	kworker/u16:1+flush-8:0	22:37:23	4
3704809	99	24	22,2	cyclictest	3910299	-21	kworker/u16:1+events_unbound	23:52:23	4
3704823	99	23	22,0	cyclictest	0	-21	swapper/7	23:57:22	7
3704815	99	23	21,2	cyclictest	83376	-21	kworker/u16:2+events_unbound	00:27:20	6
3704815	99	23	21,2	cyclictest	4096008	-21	kworker/u16:3+flush-8:0	22:42:33	6
3704815	99	23	21,2	cyclictest	3785355	-21	kworker/u16:0+flush-8:0	20:07:34	6
3704815	99	23	17,6	cyclictest	3910299	-21	kworker/u16:1+flush-8:0	23:32:30	6
3704823	99	22	21,0	cyclictest	0	-21	swapper/7	21:56:16	7
3704823	99	22	21,0	cyclictest	0	-21	swapper/7	21:56:16	7
3704823	99	22	21,0	cyclictest	0	-21	swapper/7	19:32:22	7
3704823	99	22	20,1	cyclictest	0	-21	swapper/7	22:27:25	7
3704823	99	22	20,1	cyclictest	0	-21	swapper/7	19:12:29	7
3704815	99	22	20,2	cyclictest	3996858	-21	kworker/u16:0+flush-8:0	21:32:37	6
3704815	99	22	20,2	cyclictest	3650944	-21	kworker/u16:0+events_unbound	19:12:22	6
3704815	99	22	19,2	cyclictest	3891321	-21	kworker/u16:0+flush-8:0	21:12:09	6
3704815	99	22	19,2	cyclictest	3891321	-21	kworker/u16:0+flush-8:0	21:12:09	6
3704813	99	22	20,2	cyclictest	3891321	-21	kworker/u16:0+flush-8:0	20:58:02	5
3704813	99	22	20,2	cyclictest	3843065	-21	kworker/u16:2+events_unbound	20:45:18	5
3704813	99	22	20,2	cyclictest	3785355	-21	kworker/u16:0+events_unbound	20:07:33	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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