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 Jul 23, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3241886	2	57	22,30	sleep7	0	-21	swapper/7	07:05:18	7
3241911	2	53	43,7	sleep5	0	-21	swapper/5	07:05:40	5
3242167	2	44	33,8	sleep4	0	-21	swapper/4	07:09:16	4
3242485	99	43	38,4	cyclictest	3782966	-21	missed_timers	11:09:45	7
3242485	99	43	37,5	cyclictest	3401422	-21	latency_hist	08:29:23	7
3242485	99	41	36,4	cyclictest	3391719	-21	latency_hist	08:24:22	7
3242476	99	39	37,2	cyclictest	3882298	-21	kworker/u16:4+flush-8:0	12:24:16	5
3242485	99	38	37,0	cyclictest	0	-21	swapper/7	10:46:50	7
3242485	99	37	35,1	cyclictest	3479204	-21	diskmemload	11:18:01	7
3241977	2	37	26,8	sleep6	0	-21	swapper/6	07:06:38	6
3242485	99	36	33,2	cyclictest	3994825	-21	ssh	12:38:49	7
3242485	99	35	34,0	cyclictest	0	-21	swapper/7	11:38:30	7
3242476	99	34	31,2	cyclictest	3449118	-21	kworker/u16:2+flush-8:0	10:29:41	5
3242485	99	33	32,0	cyclictest	0	-21	swapper/7	12:03:46	7
3242485	99	33	31,1	cyclictest	3540372	-21	ssh	09:33:49	7
3242485	99	33	29,2	cyclictest	3588407	-21	ssh	09:51:55	7
3242485	99	32	31,0	cyclictest	0	-21	swapper/7	12:21:20	7
3242485	99	32	31,0	cyclictest	0	-21	swapper/7	10:02:50	7
3242485	99	32	31,0	cyclictest	0	-21	swapper/7	09:11:34	7
3242485	99	32	31,0	cyclictest	0	-21	swapper/7	07:44:46	7
3242485	99	32	30,1	cyclictest	3479204	-21	diskmemload	09:57:18	7
3242485	99	32	30,1	cyclictest	0	-21	swapper/7	12:17:25	7
3242476	99	32	30,2	cyclictest	3919345	-21	kworker/u16:1+flush-8:0	12:19:17	5
3242476	99	32	30,2	cyclictest	3449118	-21	kworker/u16:2+flush-8:0	10:24:57	5
3242485	99	31	30,0	cyclictest	0	-21	swapper/7	10:36:33	7
3242485	99	31	29,1	cyclictest	0	-21	swapper/7	11:20:13	7
3242485	99	30	29,0	cyclictest	0	-21	swapper/7	07:09:37	7
3242485	99	30	28,1	cyclictest	0	-21	swapper/7	10:15:34	7
3242485	99	29	28,0	cyclictest	0	-21	swapper/7	11:58:32	7
3242485	99	29	28,0	cyclictest	0	-21	swapper/7	10:30:18	7
3242485	99	29	27,1	cyclictest	3479204	-21	diskmemload	10:51:53	7
3242476	99	29	27,2	cyclictest	3808459	-21	kworker/u16:0+flush-8:0	11:49:46	5
3242485	99	28	27,0	cyclictest	0	-21	swapper/7	10:44:14	7
3242485	99	28	27,0	cyclictest	0	-21	swapper/7	09:35:58	7
3242476	99	28	26,2	cyclictest	3401664	-21	kworker/u16:3+events_unbound	09:16:49	5
3242476	99	28	25,2	cyclictest	3562217	-21	kworker/u16:3+flush-8:0	09:59:29	5
3242485	99	27	26,0	cyclictest	0	-21	swapper/7	12:28:24	7
3242485	99	27	26,0	cyclictest	0	-21	swapper/7	11:07:25	7
3242485	99	27	26,0	cyclictest	0	-21	swapper/7	11:07:25	7
3242485	99	27	26,0	cyclictest	0	-21	swapper/7	10:07:53	7
3242485	99	27	26,0	cyclictest	0	-21	swapper/7	09:28:26	7
3242485	99	27	25,1	cyclictest	3920102	-21	ssh	12:06:54	7
3242485	99	27	25,1	cyclictest	3858101	-21	ssh	11:40:41	7
3242485	99	27	21,5	cyclictest	648	-21	systemd-journal	07:24:22	7
3242485	99	27	21,5	cyclictest	3343197	-21	latency_hist	07:59:23	7
3242476	99	27	26,1	cyclictest	3515696	-21	kworker/u16:1+events_unbound	09:26:58	5
3242476	99	27	25,2	cyclictest	3449118	-21	kworker/u16:2+flush-8:0	10:46:58	5
3242485	99	26	25,0	cyclictest	0	-21	swapper/7	12:10:54	7
3242485	99	26	25,0	cyclictest	0	-21	swapper/7	11:28:14	7
3242485	99	26	24,1	cyclictest	3638434	-21	ssh	10:13:29	7
3242476	99	26	24,2	cyclictest	3785710	-21	kworker/u16:3+flush-8:0	11:19:49	5
3242476	99	26	24,2	cyclictest	3688118	-21	kworker/u16:5+flush-8:0	10:34:49	5
3242476	99	26	24,2	cyclictest	3661612	-21	kworker/u16:0+flush-8:0	11:05:13	5
3242476	99	26	24,2	cyclictest	3661612	-21	kworker/u16:0+flush-8:0	11:05:13	5
3242476	99	26	24,2	cyclictest	3449118	-21	kworker/u16:2+events_unbound	10:19:37	5
3242471	99	26	24,2	cyclictest	3661612	-21	kworker/u16:0+flush-8:0	11:04:22	4
3242485	99	25	24,0	cyclictest	0	-21	swapper/7	11:04:02	7
3242485	99	25	24,0	cyclictest	0	-21	swapper/7	10:58:42	7
3242485	99	25	24,0	cyclictest	0	-21	swapper/7	09:22:17	7
3242476	99	25	23,2	cyclictest	3661612	-21	kworker/u16:0+flush-8:0	11:12:13	5
3242476	99	25	23,2	cyclictest	3562217	-21	kworker/u16:3+events_unbound	10:14:36	5
3242476	99	25	23,2	cyclictest	1776159	-21	kworker/u16:3+events_unbound	07:09:49	5
3242476	99	25	22,2	cyclictest	3252054	-21	kworker/u16:4+flush-8:0	07:24:41	5
3242485	99	24	23,0	cyclictest	0	-21	swapper/7	11:46:29	7
3242485	99	24	23,0	cyclictest	0	-21	swapper/7	07:59:41	7
3242485	99	24	23,0	cyclictest	0	-21	swapper/7	07:38:33	7
3242485	99	24	23,0	cyclictest	0	-21	swapper/7	07:38:33	7
3242480	99	24	4,19	cyclictest	0	-21	swapper/6	10:44:38	6
3242476	99	24	22,2	cyclictest	3725022	-21	kworker/u16:3+flush-8:0	10:53:58	5
3242476	99	24	22,2	cyclictest	3640063	-21	kworker/u16:1+events_unbound	11:02:21	5
3242476	99	24	21,2	cyclictest	3785710	-21	kworker/u16:3+events_unbound	12:29:34	5
3242485	99	23	22,0	cyclictest	0	-21	swapper/7	12:33:37	7
3242485	99	23	22,0	cyclictest	0	-21	swapper/7	11:52:56	7
3242485	99	23	22,0	cyclictest	0	-21	swapper/7	09:40:14	7
3242485	99	23	21,1	cyclictest	3565660	-21	ssh	09:44:25	7
3242480	99	23	21,2	cyclictest	3528315	-21	kworker/u16:0+events_unbound	09:50:53	6
3242480	99	23	21,2	cyclictest	3449118	-21	kworker/u16:2+events_unbound	09:12:13	6
3242476	99	23	21,2	cyclictest	3449118	-21	kworker/u16:2+events_unbound	09:35:50	5
3242485	99	22	21,0	cyclictest	0	-21	swapper/7	11:31:57	7
3242485	99	22	21,0	cyclictest	0	-21	swapper/7	10:20:41	7
3242485	99	22	19,2	cyclictest	3333519	-21	munin-run	07:54:23	7
3242480	99	22	20,2	cyclictest	3785710	-21	kworker/u16:3+events_unbound	12:18:18	6
3242480	99	22	20,2	cyclictest	3449118	-21	kworker/u16:2+events_unbound	10:42:54	6
3242476	99	22	20,2	cyclictest	3808459	-21	kworker/u16:0+flush-8:0	11:40:33	5
3242476	99	22	20,2	cyclictest	3540822	-21	kworker/u16:4+flush-8:0	09:44:51	5
3242480	99	21	20,1	cyclictest	3449118	-21	kworker/u16:2+events_unbound	09:34:30	6
3242480	99	21	19,2	cyclictest	3808459	-21	kworker/u16:0+events_unbound	11:56:54	6
3242480	99	21	19,2	cyclictest	3640063	-21	kworker/u16:1+events_unbound	10:57:41	6
3242476	99	21	19,2	cyclictest	3808459	-21	kworker/u16:0+events_unbound	12:27:33	5
3242476	99	21	19,2	cyclictest	3785710	-21	kworker/u16:3+flush-8:0	11:44:39	5
3242476	99	21	19,2	cyclictest	3785710	-21	kworker/u16:3+flush-8:0	11:19:13	5
3242476	99	21	19,2	cyclictest	3640063	-21	kworker/u16:1+events_unbound	11:34:57	5
3242476	99	21	19,2	cyclictest	3528315	-21	kworker/u16:0+flush-8:0	10:05:50	5
3242476	99	21	19,2	cyclictest	3515696	-21	kworker/u16:1+flush-8:0	09:31:01	5
3242476	99	21	18,2	cyclictest	3342190	-21	kworker/u16:1+flush-8:0	08:24:35	5
3242476	99	21	18,2	cyclictest	1776159	-21	kworker/u16:3+flush-8:0	07:29:41	5
3242471	99	21	17,3	cyclictest	3342190	-21	kworker/u16:1+flush-8:0	09:18:19	4
3242480	99	20	18,2	cyclictest	3808459	-21	kworker/u16:0+events_unbound	11:44:55	6
3242480	99	20	17,2	cyclictest	3342190	-21	kworker/u16:1+events_unbound	08:24:28	6
3242480	99	20	15,1	cyclictest	20	1	rcu_preempt	09:18:20	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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