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 Sun Dec 21, 2025 12:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3233950	2	57	46,7	sleep6	0	-21	swapper/6	07:04:32	6
3242989	2	54	43,8	sleep5	0	-21	swapper/5	07:05:59	5
3243105	2	45	10,30	sleep7	0	-21	swapper/7	07:07:38	7
3242891	2	45	33,7	sleep4	0	-21	swapper/4	07:05:02	4
3243538	99	37	31,5	cyclictest	3741066	-21	latency_hist	11:24:23	7
3243533	99	32	29,3	cyclictest	3392335	-21	kworker/u16:3+flush-8:0	08:34:49	5
3659035	2	29	0,1	chrt	3659036	-21	kthreadcore	10:39:43	5
3243528	99	29	27,2	cyclictest	3392335	-21	kworker/u16:3+events_unbound	09:42:44	4
3243528	99	28	26,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	10:23:05	4
3243528	99	28	26,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	09:04:49	4
3243538	99	27	26,0	cyclictest	0	-21	swapper/7	08:19:45	7
3243528	99	27	25,2	cyclictest	3760738	-21	kworker/u16:2+events_unbound	11:53:01	4
3243528	99	27	25,2	cyclictest	3692770	-21	kworker/u16:0+events_unbound	11:22:45	4
3243538	99	26	24,1	cyclictest	0	-21	swapper/7	11:24:43	7
3243528	99	26	24,2	cyclictest	3553138	-21	kworker/u16:2+flush-8:0	10:04:53	4
3243528	99	26	24,2	cyclictest	3553138	-21	kworker/u16:2+flush-8:0	10:04:53	4
3243528	99	26	24,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	08:47:00	4
3243538	99	25	23,1	cyclictest	0	-21	swapper/7	11:29:36	7
3243528	99	25	23,2	cyclictest	3837565	-21	kworker/u16:1+events_unbound	12:38:25	4
3243528	99	25	23,2	cyclictest	3731415	-21	kworker/u16:1+events_unbound	11:37:40	4
3243528	99	25	23,2	cyclictest	3692770	-21	kworker/u16:0+events_unbound	11:49:02	4
3243528	99	25	23,2	cyclictest	3692770	-21	kworker/u16:0+events_unbound	11:06:14	4
3243528	99	25	23,2	cyclictest	3480627	-21	kworker/u16:0+events_unbound	09:56:36	4
3243528	99	25	23,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	10:26:05	4
3243528	99	25	23,2	cyclictest	3392335	-21	kworker/u16:3+events_unbound	09:37:09	4
3243528	99	25	23,2	cyclictest	3392335	-21	kworker/u16:3+events_unbound	09:22:36	4
3243528	99	25	23,2	cyclictest	3363776	-21	kworker/u16:4+events_unbound	08:13:01	4
3243528	99	25	23,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	08:08:36	4
3243538	99	24	22,1	cyclictest	0	-21	swapper/7	10:34:41	7
3243538	99	24	0,22	cyclictest	3693786	-21	sed	10:59:39	7
3243528	99	24	22,2	cyclictest	3701330	-21	kworker/u16:2+events_unbound	11:14:09	4
3243528	99	24	22,2	cyclictest	3480627	-21	kworker/u16:0+events_unbound	10:15:53	4
3243528	99	24	22,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	10:46:44	4
3243528	99	24	22,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	10:43:52	4
3243528	99	24	22,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	09:11:20	4
3243528	99	24	22,2	cyclictest	3296050	-21	kworker/u16:1+events_unbound	07:37:37	4
3243528	99	24	22,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	08:20:21	4
3243528	99	24	22,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:28:30	4
3243528	99	24	21,2	cyclictest	3344077	-21	kworker/u16:2+events_unbound	08:14:33	4
3243528	99	23	21,2	cyclictest	3837565	-21	kworker/u16:1+events_unbound	12:12:29	4
3243528	99	23	21,2	cyclictest	3712318	-21	kworker/u16:3+events_unbound	11:30:48	4
3243528	99	23	21,2	cyclictest	3712318	-21	kworker/u16:3+events_unbound	11:27:36	4
3243528	99	23	21,2	cyclictest	3634810	-21	kworker/u16:2+events_unbound	10:39:20	4
3243528	99	23	21,2	cyclictest	3480627	-21	kworker/u16:0+events_unbound	10:12:49	4
3243528	99	23	21,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	10:03:17	4
3243528	99	23	21,2	cyclictest	3381902	-21	kworker/u16:1+events_unbound	08:44:21	4
3243528	99	23	21,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	09:01:53	4
3243528	99	23	21,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:40:49	4
3243528	99	23	21,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:40:49	4
3243528	99	23	20,2	cyclictest	3344077	-21	kworker/u16:2+events_unbound	08:24:25	4
3243528	99	22	20,2	cyclictest	3779925	-21	kworker/u16:3+events_unbound	12:18:29	4
3243528	99	22	20,2	cyclictest	3760738	-21	kworker/u16:2+flush-8:0	11:44:18	4
3243528	99	22	20,2	cyclictest	3760738	-21	kworker/u16:2+flush-8:0	11:44:18	4
3243528	99	22	20,2	cyclictest	3712318	-21	kworker/u16:3+events_unbound	11:16:28	4
3243528	99	22	20,2	cyclictest	3672288	-21	kworker/u16:4+events_unbound	10:54:09	4
3243528	99	22	20,2	cyclictest	3672288	-21	kworker/u16:4+events_unbound	10:54:09	4
3243528	99	22	20,2	cyclictest	2538563	-21	kworker/u16:3+events_unbound	07:18:57	4
3243528	99	22	20,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	08:58:41	4
3243528	99	22	20,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:50:58	4
3243528	99	22	20,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:34:10	4
3243528	99	22	20,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:21:22	4
3243528	99	22	20,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	07:10:14	4
3243528	99	22	19,2	cyclictest	3470207	-21	kworker/u16:1+events_unbound	09:29:36	4
3243528	99	21	19,2	cyclictest	3692770	-21	kworker/u16:0+events_unbound	12:07:44	4
3243528	99	21	19,2	cyclictest	3508683	-21	kworker/u16:4+events_unbound	09:25:57	4
3243528	99	21	19,2	cyclictest	3480627	-21	kworker/u16:0+events_unbound	09:52:32	4
3243528	99	21	19,2	cyclictest	3392335	-21	kworker/u16:3+events_unbound	08:39:09	4
3243528	99	21	19,2	cyclictest	3381902	-21	kworker/u16:1+events_unbound	08:30:25	4
3243528	99	21	19,2	cyclictest	3344077	-21	kworker/u16:2+events_unbound	08:03:25	4
3243538	99	20	18,1	cyclictest	0	-21	swapper/7	11:44:49	7
3243535	99	20	17,3	cyclictest	3257336	-21	kworker/u16:4+flush-8:0	07:19:49	6
3243528	99	20	18,2	cyclictest	3837565	-21	kworker/u16:1+events_unbound	12:23:44	4
3243528	99	20	18,2	cyclictest	3692770	-21	kworker/u16:0+events_unbound	11:57:44	4
3243528	99	20	18,2	cyclictest	3672288	-21	kworker/u16:4+events_unbound	11:00:23	4
3243528	99	20	18,2	cyclictest	2527542	-21	kworker/u16:0+events_unbound	08:53:46	4
3243528	99	20	17,2	cyclictest	3296050	-21	kworker/u16:1+flush-8:0	07:44:24	4
3243538	99	19	18,0	cyclictest	0	-21	swapper/7	11:59:43	7
3243538	99	19	0,17	cyclictest	3512961	-21	kthreadcore	09:24:42	7
3243528	99	19	17,2	cyclictest	3857588	-21	kworker/u16:3+events_unbound	12:25:53	4
3243528	99	19	17,2	cyclictest	3847625	-21	kworker/u16:0+events_unbound	12:31:56	4
3243528	99	19	17,2	cyclictest	3692770	-21	kworker/u16:0+events_unbound	12:02:10	4
3243528	99	19	17,2	cyclictest	3615092	-21	kworker/u16:3+events_unbound	10:29:32	4
3243528	99	19	17,2	cyclictest	2527542	-21	kworker/u16:0+flush-8:0	07:56:53	4
3243538	99	18	16,1	cyclictest	3547320	-21	awk	09:44:23	7
3243538	99	18	13,4	cyclictest	3837882	-21	latency_hist	12:14:22	7
3243538	99	17	15,1	cyclictest	0	-21	swapper/7	10:24:43	7
3243538	99	17	15,1	cyclictest	0	-21	swapper/7	07:39:39	7
3243538	99	17	15,1	cyclictest	0	-21	swapper/7	07:39:39	7
3243538	99	17	13,3	cyclictest	3712034	-21	cat	11:09:23	7
3243528	99	17	15,2	cyclictest	3392335	-21	kworker/u16:3+flush-8:0	09:46:37	4
3243538	99	16	15,0	cyclictest	0	-21	swapper/7	08:49:42	7
3243538	99	16	13,2	cyclictest	3576476	-21	cat	09:59:23	7
3243538	99	16	12,3	cyclictest	1267	-21	snmpd	10:30:45	7
3243533	99	16	12,3	cyclictest	3775772	-21	grep	11:39:43	5
3243533	99	16	12,3	cyclictest	3775772	-21	grep	11:39:43	5
3243538	99	15	8,6	cyclictest	6045	-21	gmain	12:19:52	7
3243538	99	15	14,0	cyclictest	0	-21	swapper/7	08:34:42	7
3243538	99	15	14,0	cyclictest	0	-21	swapper/7	08:09:29	7
3243538	99	15	14,0	cyclictest	0	-21	swapper/7	07:25:34	7
3243538	99	15	10,4	cyclictest	3353736	-21	latency_hist	08:04:24	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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