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 Wed Jun 10, 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
4044715	2	69	0,0	sleep4	0	-21	swapper/4	23:26:39	4
4012859	2	68	0,1	sleep7	4012861	-21	latency_hist	23:16:16	7
3463437	2	59	48,8	sleep4	0	-21	swapper/4	19:05:32	4
3463802	99	52	50,2	cyclictest	3927822	-21	kworker/u16:1+flush-8:0	23:06:32	6
3463802	99	49	47,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	21:26:46	6
3463802	99	48	46,2	cyclictest	3709690	-21	kworker/u16:1+events_unbound	21:51:43	6
3454357	2	47	36,7	sleep5	0	-21	swapper/5	19:01:24	5
3463802	99	46	43,2	cyclictest	1930336	-21	kworker/u16:2+events_unbound	19:16:31	6
3463802	99	45	43,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	22:21:49	6
3463802	99	44	42,2	cyclictest	3709690	-21	kworker/u16:1+events_unbound	21:46:48	6
3463802	99	44	42,2	cyclictest	3709690	-21	kworker/u16:1+events_unbound	21:46:48	6
3463802	99	44	42,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:21:41	6
3463802	99	44	42,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:01:40	6
3463802	99	43	41,2	cyclictest	3879686	-21	kworker/u16:1+flush-8:0	22:31:49	6
3463802	99	43	41,2	cyclictest	3879686	-21	kworker/u16:1+flush-8:0	22:31:49	6
3460446	2	43	1,31	sleep7	0	-21	swapper/7	19:01:42	7
3463802	99	42	40,2	cyclictest	3504199	-21	kworker/u16:0+flush-8:0	19:41:44	6
3463793	99	42	40,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	21:16:42	4
3463802	99	41	39,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	22:16:44	6
3463802	99	40	38,2	cyclictest	3659357	-21	kworker/u16:3+flush-8:0	20:56:45	6
3463807	99	39	33,5	cyclictest	3649712	-21	latency_hist	20:41:16	7
3463802	99	39	37,2	cyclictest	2749613	-21	kworker/u16:4+events_unbound	19:26:45	6
3463802	99	38	36,2	cyclictest	4024570	-21	kworker/u16:3+events_unbound	23:21:37	6
3463802	99	38	36,2	cyclictest	3927822	-21	kworker/u16:1+flush-8:0	22:56:45	6
3463802	99	38	36,2	cyclictest	3900175	-21	kworker/u16:3+events_unbound	22:28:18	6
3463802	99	38	36,2	cyclictest	3832148	-21	kworker/u16:0+events_unbound	22:11:49	6
3463802	99	38	35,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	22:41:31	6
3463798	99	38	35,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	22:11:31	5
3463802	99	37	35,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	20:41:39	6
3463802	99	37	34,2	cyclictest	4082784	-21	kworker/u16:3+events_unbound	00:01:33	6
3463802	99	37	34,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	20:06:32	6
3463802	99	36	34,2	cyclictest	4133306	-21	kworker/u16:5+events_unbound	00:08:43	6
3463802	99	36	34,2	cyclictest	3927822	-21	kworker/u16:1+events_unbound	23:04:06	6
3463802	99	36	34,2	cyclictest	3927822	-21	kworker/u16:1+events_unbound	22:56:01	6
3463802	99	36	34,2	cyclictest	3832148	-21	kworker/u16:0+events_unbound	22:06:48	6
3463802	99	36	34,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	23:11:51	6
3463802	99	36	34,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	19:51:45	6
3463802	99	36	34,2	cyclictest	3515642	-21	kworker/u16:1+flush-8:0	19:31:46	6
3463802	99	36	34,2	cyclictest	3472459	-21	kworker/u16:3+flush-8:0	19:36:37	6
3463802	99	36	34,2	cyclictest	3472459	-21	kworker/u16:3+flush-8:0	19:36:37	6
3463798	99	36	34,2	cyclictest	3927822	-21	kworker/u16:1+flush-8:0	23:06:11	5
3463802	99	35	33,2	cyclictest	4133302	-21	kworker/u16:2+events_unbound	00:32:39	6
3463802	99	35	33,2	cyclictest	4082784	-21	kworker/u16:3+events_unbound	23:53:22	6
3463802	99	35	33,2	cyclictest	4082784	-21	kworker/u16:3+events_unbound	23:53:22	6
3463802	99	35	33,2	cyclictest	3832148	-21	kworker/u16:0+events_unbound	23:27:31	6
3463802	99	35	33,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	21:58:04	6
3463798	99	35	32,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	20:16:42	5
3463807	99	34	29,4	cyclictest	3697598	-21	latency_hist	21:06:16	7
3463802	99	33	31,2	cyclictest	4133302	-21	kworker/u16:2+events_unbound	00:17:42	6
3463802	99	33	31,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	21:44:31	6
3463802	99	33	31,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	21:14:35	6
3463802	99	33	30,2	cyclictest	3832148	-21	kworker/u16:0+events_unbound	22:46:17	6
3463798	99	33	32,1	cyclictest	3573302	-21	kworker/u16:0+events_unbound	20:31:34	5
3463798	99	33	31,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	22:21:47	5
3454358	2	33	22,7	sleep6	0	-21	swapper/6	19:01:25	6
3463802	99	32	30,2	cyclictest	3659357	-21	kworker/u16:3+events_unbound	21:19:48	6
3463802	99	32	30,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	21:39:19	6
3463802	99	32	30,2	cyclictest	3515642	-21	kworker/u16:1+events_unbound	19:57:18	6
3463807	99	31	28,2	cyclictest	3631716	-21	/usr/sbin/munin	20:31:32	7
3463802	99	31	29,2	cyclictest	4109668	-21	kworker/u16:1+events_unbound	00:14:29	6
3463802	99	31	29,2	cyclictest	3709690	-21	kworker/u16:1+events_unbound	21:34:51	6
3463802	99	31	29,2	cyclictest	3659357	-21	kworker/u16:3+events_unbound	20:49:44	6
3463802	99	31	29,2	cyclictest	3573302	-21	kworker/u16:0+events_unbound	20:34:08	6
3463798	99	31	29,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	21:26:33	5
4054917	2	30	0,0	chrt	0	-21	swapper/6	23:31:38	6
3463802	99	30	28,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	23:19:51	6
3771280	2	29	0,1	chrt	3771277	-21	grep	21:36:30	7
3463807	99	29	28,0	cyclictest	0	-21	swapper/7	19:49:03	7
3463807	99	29	28,0	cyclictest	0	-21	swapper/7	19:31:30	7
3463807	99	29	27,1	cyclictest	4060672	-21	ssh	23:35:49	7
3463802	99	29	27,2	cyclictest	4082784	-21	kworker/u16:3+events_unbound	23:44:00	6
3463802	99	29	27,2	cyclictest	3573302	-21	kworker/u16:0+flush-8:0	20:36:45	6
3463802	99	29	27,2	cyclictest	3544271	-21	kworker/u16:2+flush-8:0	21:06:41	6
3463802	99	29	27,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	23:49:45	6
3463802	99	29	27,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:51:26	6
3463802	99	29	27,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:18:08	6
3463802	99	29	27,2	cyclictest	3504199	-21	kworker/u16:0+events_unbound	19:22:44	6
4160948	2	28	0,1	chrt	4160949	-21	kthreadcore	00:16:35	7
3463807	99	28	27,0	cyclictest	0	-21	swapper/7	20:00:19	7
3463802	99	28	26,2	cyclictest	4181898	-21	kworker/u16:1+events_unbound	00:31:13	6
3463802	99	28	26,2	cyclictest	4133302	-21	kworker/u16:2+events_unbound	00:24:29	6
3463802	99	28	26,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:11:36	6
3463802	99	28	26,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	19:47:43	6
3463802	99	28	25,2	cyclictest	3472459	-21	kworker/u16:3+flush-8:0	19:11:27	6
3463807	99	27	25,1	cyclictest	3937528	-21	ssh	22:41:57	7
3463802	99	27	25,2	cyclictest	3832148	-21	kworker/u16:0+events_unbound	22:04:21	6
3463798	99	27	26,1	cyclictest	3544271	-21	kworker/u16:2+events_unbound	21:40:27	5
3463798	99	27	24,2	cyclictest	3927822	-21	kworker/u16:1+flush-8:0	22:51:34	5
3463807	99	26	25,0	cyclictest	0	-21	swapper/7	22:12:02	7
3463807	99	26	25,0	cyclictest	0	-21	swapper/7	20:09:52	7
3463802	99	26	24,2	cyclictest	4109668	-21	kworker/u16:1+events_unbound	23:59:40	6
3463802	99	26	24,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:29:32	6
3463798	99	26	24,2	cyclictest	3544271	-21	kworker/u16:2+events_unbound	20:51:30	5
3463798	99	26	23,2	cyclictest	3770270	-21	kworker/u16:0+flush-8:0	21:51:46	5
3463807	99	25	24,0	cyclictest	0	-21	swapper/7	23:02:14	7
3463807	99	25	0,24	cyclictest	4036675	-21	latency_hist	23:26:16	7
3463802	99	25	23,2	cyclictest	3659357	-21	kworker/u16:3+events_unbound	21:23:33	6
3463802	99	25	23,2	cyclictest	3454355	-21	kworker/u16:1+events_unbound	19:09:15	6
3463807	99	24	23,0	cyclictest	0	-21	swapper/7	23:01:12	7
3463807	99	24	23,0	cyclictest	0	-21	swapper/7	19:13:43	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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