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 Sat Jun 13, 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
3822917	2	64	0,1	sleep5	0	-21	swapper/5	23:21:26	5
3257859	2	57	46,8	sleep4	0	-21	swapper/4	19:02:58	4
3258028	2	48	38,7	sleep5	0	-21	swapper/5	19:05:24	5
3257652	2	47	3,38	sleep7	0	-21	swapper/7	19:01:41	7
3258370	99	44	43,0	cyclictest	0	-21	swapper/7	23:21:36	7
3258370	99	44	40,3	cyclictest	3504243	-21	latency_hist	21:11:04	7
3258359	99	42	40,2	cyclictest	3600711	-21	kworker/u16:1+events_unbound	22:11:32	4
3258370	99	40	38,1	cyclictest	3492270	-21	diskmemload	22:26:30	7
3258370	99	40	0,38	cyclictest	3588287	-21	latency_hist	21:46:05	7
3258359	99	40	38,2	cyclictest	3248891	-21	kworker/u16:3+events_unbound	19:11:09	4
3258370	99	39	34,4	cyclictest	3482695	-21	latency_hist	21:01:05	7
3258359	99	33	31,2	cyclictest	3564368	-21	kworker/u16:4+events_unbound	22:56:33	4
3258365	99	32	30,2	cyclictest	3482364	-21	kworker/u16:3+events_unbound	21:26:31	6
3258040	2	32	20,9	sleep6	0	-21	swapper/6	19:05:33	6
3677187	2	31	0,0	chrt	3677189	-21	kthreadcore	22:21:25	7
3258370	99	31	30,0	cyclictest	0	-21	swapper/7	21:56:10	7
3258370	99	31	30,0	cyclictest	0	-21	swapper/7	21:56:10	7
3258370	99	31	30,0	cyclictest	0	-21	swapper/7	21:01:19	7
3258370	99	31	30,0	cyclictest	0	-21	swapper/7	19:27:23	7
3258370	99	31	26,4	cyclictest	3281267	-21	latency_hist	19:16:05	7
3258359	99	31	29,2	cyclictest	3513571	-21	kworker/u16:0+events_unbound	21:17:34	4
3258359	99	31	29,2	cyclictest	3513571	-21	kworker/u16:0+events_unbound	21:17:34	4
3258370	99	30	29,0	cyclictest	0	-21	swapper/7	22:40:10	7
3258370	99	30	29,0	cyclictest	0	-21	swapper/7	19:36:30	7
3258359	99	30	28,2	cyclictest	3564368	-21	kworker/u16:4+flush-8:0	00:11:32	4
3258359	99	30	28,2	cyclictest	3552358	-21	kworker/u16:2+events_unbound	22:32:42	4
3258359	99	30	28,2	cyclictest	3482364	-21	kworker/u16:3+events_unbound	21:48:56	4
3772588	2	29	0,1	chrt	3772591	-21	kthreadcore	23:01:24	7
3258370	99	29	28,0	cyclictest	0	-21	swapper/7	21:25:15	7
3258359	99	29	27,2	cyclictest	3728683	-21	kworker/u16:0+events_unbound	22:49:23	4
3258359	99	29	27,2	cyclictest	3482364	-21	kworker/u16:3+events_unbound	21:24:54	4
3258359	99	29	27,2	cyclictest	3310075	-21	kworker/u16:1+events_unbound	19:42:27	4
3258370	99	28	27,0	cyclictest	0	-21	swapper/7	23:27:24	7
3258359	99	28	26,2	cyclictest	3728683	-21	kworker/u16:0+events_unbound	23:53:13	4
3258359	99	28	26,2	cyclictest	3552358	-21	kworker/u16:2+events_unbound	21:56:33	4
3258359	99	28	26,2	cyclictest	3552358	-21	kworker/u16:2+events_unbound	21:56:33	4
3731130	2	27	0,1	chrt	3731129	-21	ssh	22:43:45	7
3258370	99	27	26,0	cyclictest	0	-21	swapper/7	23:40:33	7
3258370	99	27	26,0	cyclictest	0	-21	swapper/7	22:46:53	7
3258370	99	27	26,0	cyclictest	0	-21	swapper/7	22:16:45	7
3258370	99	27	25,1	cyclictest	3897398	-21	ssh	23:51:34	7
3258359	99	27	25,2	cyclictest	3728683	-21	kworker/u16:0+flush-8:0	23:06:30	4
3258359	99	27	25,2	cyclictest	3672323	-21	kworker/u16:0+events_unbound	22:21:20	4
3258359	99	27	25,2	cyclictest	3513571	-21	kworker/u16:0+events_unbound	21:14:40	4
3258370	99	26	25,0	cyclictest	0	-21	swapper/7	23:11:12	7
3258370	99	26	25,0	cyclictest	0	-21	swapper/7	22:59:13	7
3258370	99	26	25,0	cyclictest	0	-21	swapper/7	20:52:27	7
3258370	99	26	25,0	cyclictest	0	-21	swapper/7	00:05:09	7
3258370	99	26	25,0	cyclictest	0	-21	swapper/7	00:05:09	7
3258365	99	26	24,2	cyclictest	3239357	-21	kworker/u16:2+events_unbound	19:16:18	6
3258359	99	26	24,2	cyclictest	3728683	-21	kworker/u16:0+events_unbound	23:23:31	4
3258359	99	26	24,2	cyclictest	3310075	-21	kworker/u16:1+flush-8:0	19:58:43	4
3258359	99	26	24,2	cyclictest	2991736	-21	kworker/u16:0+events_unbound	20:07:58	4
3258370	99	25	24,0	cyclictest	0	-21	swapper/7	22:13:08	7
3258370	99	25	24,0	cyclictest	0	-21	swapper/7	22:08:42	7
3258370	99	25	24,0	cyclictest	0	-21	swapper/7	20:41:56	7
3258370	99	25	24,0	cyclictest	0	-21	swapper/7	20:22:23	7
3258370	99	25	24,0	cyclictest	0	-21	swapper/7	19:48:02	7
3258370	99	25	24,0	cyclictest	0	-21	swapper/7	19:20:36	7
3258359	99	25	23,2	cyclictest	3837053	-21	kworker/u16:3+events_unbound	23:41:53	4
3258359	99	25	23,2	cyclictest	3564368	-21	kworker/u16:4+events_unbound	22:39:29	4
3258359	99	25	23,2	cyclictest	3415984	-21	kworker/u16:2+flush-8:0	20:45:38	4
3258359	99	25	23,2	cyclictest	2991736	-21	kworker/u16:0+events_unbound	20:17:58	4
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	23:19:52	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	21:16:48	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	21:16:48	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	20:33:00	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	20:14:19	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	20:08:19	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	19:59:43	7
3258370	99	24	23,0	cyclictest	0	-21	swapper/7	00:24:16	7
3258370	99	24	22,1	cyclictest	0	-21	swapper/7	22:55:21	7
3258359	99	24	22,2	cyclictest	3728683	-21	kworker/u16:0+events_unbound	23:17:12	4
3258359	99	24	22,2	cyclictest	3728683	-21	kworker/u16:0+events_unbound	00:08:57	4
3258359	99	24	22,2	cyclictest	3482364	-21	kworker/u16:3+events_unbound	21:35:09	4
3258359	99	24	22,2	cyclictest	3482364	-21	kworker/u16:3+events_unbound	21:26:29	4
3258359	99	24	22,2	cyclictest	3415984	-21	kworker/u16:2+events_unbound	20:55:02	4
3258370	99	23	22,0	cyclictest	0	-21	swapper/7	20:03:59	7
3258370	99	23	22,0	cyclictest	0	-21	swapper/7	19:35:26	7
3258370	99	23	22,0	cyclictest	0	-21	swapper/7	00:13:40	7
3258365	99	23	21,2	cyclictest	3552358	-21	kworker/u16:2+flush-8:0	22:06:14	6
3258359	99	23	21,2	cyclictest	3837053	-21	kworker/u16:3+events_unbound	23:40:55	4
3258359	99	23	21,2	cyclictest	3329528	-21	kworker/u16:2+events_unbound	20:03:47	4
3258359	99	23	21,2	cyclictest	2991736	-21	kworker/u16:0+events_unbound	19:40:54	4
3258370	99	22	21,0	cyclictest	0	-21	swapper/7	23:49:27	7
3258370	99	22	21,0	cyclictest	0	-21	swapper/7	21:55:27	7
3258370	99	22	21,0	cyclictest	0	-21	swapper/7	21:50:20	7
3258370	99	22	21,0	cyclictest	0	-21	swapper/7	20:49:43	7
3258370	99	22	21,0	cyclictest	0	-21	swapper/7	20:16:06	7
3258370	99	22	21,0	cyclictest	0	-21	swapper/7	19:41:51	7
3258359	99	22	20,2	cyclictest	3984237	-21	kworker/u16:1+events_unbound	00:31:47	4
3258359	99	22	20,2	cyclictest	3552358	-21	kworker/u16:2+events_unbound	21:52:43	4
3258359	99	22	20,2	cyclictest	3415984	-21	kworker/u16:2+events_unbound	20:49:14	4
3258359	99	22	20,2	cyclictest	3239357	-21	kworker/u16:2+events_unbound	19:23:12	4
3258370	99	21	19,1	cyclictest	0	-21	swapper/7	00:09:36	7
3258365	99	21	19,2	cyclictest	2991736	-21	kworker/u16:0+flush-8:0	19:36:18	6
3258359	99	21	19,2	cyclictest	3564368	-21	kworker/u16:4+events_unbound	23:56:46	4
3258359	99	21	19,2	cyclictest	3415984	-21	kworker/u16:2+events_unbound	20:38:11	4
3258359	99	21	19,2	cyclictest	3377162	-21	kworker/u16:4+events_unbound	20:13:34	4
3258359	99	21	19,2	cyclictest	3248891	-21	kworker/u16:3+events_unbound	19:27:54	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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