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 14, 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
4092669	2	128	0,0	sleep6	84	1	rcuc/6	12:00:02	6
3523383	2	53	19,30	sleep7	0	-21	swapper/7	07:06:23	7
3523627	2	50	40,7	sleep4	0	-21	swapper/4	07:09:49	4
3523418	2	42	32,7	sleep6	0	-21	swapper/6	07:06:54	6
3523940	99	35	29,5	cyclictest	3907220	-21	latency_hist	10:24:51	7
3523350	2	30	20,7	sleep5	0	-21	swapper/5	07:05:57	5
3827186	2	29	0,0	sleep4	0	-21	swapper/4	09:40:11	4
3523936	99	26	24,2	cyclictest	3819657	-21	kworker/u16:0+events_unbound	09:39:22	6
3523940	99	25	21,3	cyclictest	3732201	-21	awk	08:54:51	7
3523940	99	24	22,1	cyclictest	3848881	-21	basename	09:54:50	7
3523940	99	24	22,1	cyclictest	3654403	-21	idleruntime-cro	08:14:50	7
3523936	99	24	22,2	cyclictest	3917047	-21	kworker/u16:0+events_unbound	10:31:21	6
3523928	99	24	22,2	cyclictest	2784844	-21	kworker/u16:1+flush-8:0	07:35:20	4
3523940	99	23	16,5	cyclictest	650	-21	systemd-journal	07:59:52	7
3523936	99	23	21,2	cyclictest	3760138	-21	kworker/u16:4+events_unbound	09:50:34	6
3523936	99	23	21,2	cyclictest	3673845	-21	kworker/u16:2+events_unbound	08:38:23	6
3523936	99	23	21,2	cyclictest	3566259	-21	kworker/u16:0+events_unbound	07:30:11	6
3523936	99	23	21,2	cyclictest	2784844	-21	kworker/u16:1+events_unbound	07:42:22	6
3523936	99	23	21,2	cyclictest	2784844	-21	kworker/u16:1+events_unbound	07:42:22	6
3523928	99	23	21,2	cyclictest	3595801	-21	kworker/u16:0+events_unbound	07:45:04	4
3523928	99	23	20,2	cyclictest	3663906	-21	kworker/u16:1+flush-8:0	08:35:09	4
3523936	99	22	20,2	cyclictest	4023030	-21	kworker/u16:0+events_unbound	12:06:33	6
3523936	99	22	20,2	cyclictest	3965795	-21	kworker/u16:1+events_unbound	12:29:33	6
3523936	99	22	20,2	cyclictest	3663906	-21	kworker/u16:1+events_unbound	08:28:22	6
3523936	99	22	20,2	cyclictest	3644303	-21	kworker/u16:0+events_unbound	09:29:22	6
3523936	99	22	20,2	cyclictest	3625910	-21	kworker/u16:2+events_unbound	08:11:39	6
3523936	99	22	20,2	cyclictest	2784844	-21	kworker/u16:1+events_unbound	07:59:22	6
3523936	99	22	20,2	cyclictest	2784844	-21	kworker/u16:1+events_unbound	07:15:16	6
3523928	99	22	20,2	cyclictest	3965795	-21	kworker/u16:1+flush-8:0	11:20:21	4
3523928	99	22	20,2	cyclictest	3760138	-21	kworker/u16:4+flush-8:0	09:19:46	4
3523928	99	22	20,2	cyclictest	3760138	-21	kworker/u16:4+flush-8:0	09:19:46	4
3523940	99	21	16,4	cyclictest	650	-21	systemd-journal	09:34:51	7
3523936	99	21	19,2	cyclictest	3868347	-21	kworker/u16:1+events_unbound	10:27:21	6
3523936	99	21	19,2	cyclictest	3731872	-21	kworker/u16:3+events_unbound	09:05:27	6
3523936	99	21	18,2	cyclictest	3965795	-21	kworker/u16:1+events_unbound	11:54:52	6
3523928	99	21	19,2	cyclictest	3965795	-21	kworker/u16:1+flush-8:0	12:30:13	4
3523928	99	21	19,2	cyclictest	3965795	-21	kworker/u16:1+flush-8:0	12:30:13	4
3523928	99	21	19,2	cyclictest	3848983	-21	kworker/u16:3+events_unbound	10:29:22	4
3523928	99	21	19,2	cyclictest	3839529	-21	kworker/u16:2+events_unbound	10:00:38	4
3523928	99	21	19,2	cyclictest	3731872	-21	kworker/u16:3+events_unbound	08:52:02	4
3523940	99	20	14,5	cyclictest	3887837	-21	latency_hist	10:14:51	7
3523936	99	20	18,2	cyclictest	3819657	-21	kworker/u16:0+flush-8:0	10:10:17	6
3523936	99	20	18,2	cyclictest	3819657	-21	kworker/u16:0+flush-8:0	09:59:51	6
3523936	99	20	18,2	cyclictest	3819657	-21	kworker/u16:0+events_unbound	09:57:34	6
3523936	99	20	18,2	cyclictest	3595801	-21	kworker/u16:0+events_unbound	07:51:10	6
3523936	99	20	17,2	cyclictest	3582640	-21	kworker/u16:3+flush-8:0	07:59:54	6
3523928	99	20	18,2	cyclictest	3848983	-21	kworker/u16:3+events_unbound	11:04:52	4
3523928	99	20	18,2	cyclictest	3839529	-21	kworker/u16:2+events_unbound	09:52:22	4
3523936	99	19	17,2	cyclictest	4023030	-21	kworker/u16:0+events_unbound	11:51:34	6
3523936	99	19	17,2	cyclictest	4013848	-21	kworker/u16:5+events_unbound	11:22:49	6
3523936	99	19	17,2	cyclictest	3965795	-21	kworker/u16:1+events_unbound	11:40:53	6
3523936	99	19	17,2	cyclictest	3965795	-21	kworker/u16:1+events_unbound	11:40:53	6
3523936	99	19	17,2	cyclictest	3673845	-21	kworker/u16:2+flush-8:0	08:30:12	6
3523936	99	19	17,2	cyclictest	3673845	-21	kworker/u16:2+flush-8:0	08:30:12	6
3523936	99	19	17,2	cyclictest	3644303	-21	kworker/u16:0+events_unbound	09:00:54	6
3523936	99	19	17,2	cyclictest	3644303	-21	kworker/u16:0+events_unbound	08:44:31	6
3523936	99	19	17,2	cyclictest	3484892	-21	kworker/u16:4+flush-8:0	07:45:19	6
3523928	99	19	18,1	cyclictest	3985102	-21	kworker/u16:2+flush-8:0	11:30:15	4
3523928	99	19	17,2	cyclictest	4091010	-21	kworker/u16:3+events_unbound	11:59:45	4
3523928	99	19	17,2	cyclictest	3819657	-21	kworker/u16:0+events_unbound	10:08:29	4
3523928	99	19	17,2	cyclictest	3819657	-21	kworker/u16:0+events_unbound	10:08:29	4
3523928	99	19	17,2	cyclictest	3644303	-21	kworker/u16:0+events_unbound	08:26:26	4
3523928	99	19	17,2	cyclictest	2784844	-21	kworker/u16:1+flush-8:0	08:00:04	4
3523940	99	18	13,4	cyclictest	650	-21	systemd-journal	07:39:51	7
3523936	99	18	16,2	cyclictest	4111831	-21	kworker/u16:4+flush-8:0	12:30:18	6
3523936	99	18	16,2	cyclictest	4111831	-21	kworker/u16:4+flush-8:0	12:30:18	6
3523936	99	18	16,2	cyclictest	3790709	-21	kworker/u16:1+flush-8:0	09:43:25	6
3523936	99	18	16,2	cyclictest	3760138	-21	kworker/u16:4+events_unbound	09:47:50	6
3523936	99	18	16,2	cyclictest	3731872	-21	kworker/u16:3+events_unbound	08:54:50	6
3523936	99	18	15,2	cyclictest	3582640	-21	kworker/u16:3+events_unbound	08:05:20	6
3523928	99	18	16,2	cyclictest	4111831	-21	kworker/u16:4+events_unbound	12:11:21	4
3523928	99	18	16,2	cyclictest	4023030	-21	kworker/u16:0+events_unbound	12:16:33	4
3523928	99	18	16,2	cyclictest	3955689	-21	kworker/u16:0+events_unbound	10:53:02	4
3523928	99	18	16,2	cyclictest	3760138	-21	kworker/u16:4+events_unbound	09:36:01	4
3523928	99	18	16,2	cyclictest	3484892	-21	kworker/u16:4+flush-8:0	07:10:12	4
3523928	99	18	16,2	cyclictest	2784844	-21	kworker/u16:1+events_unbound	07:41:39	4
3523928	99	18	16,2	cyclictest	2784844	-21	kworker/u16:1+events_unbound	07:41:39	4
3523928	99	18	15,2	cyclictest	3254067	-21	kworker/u16:2+events_unbound	07:19:58	4
3523940	99	17	11,5	cyclictest	4033676	-21	latency_hist	11:29:50	7
3523940	99	17	0,15	cyclictest	1267	-21	snmpd	10:46:13	7
3523936	99	17	15,2	cyclictest	4023030	-21	kworker/u16:0+events_unbound	11:37:34	6
3523936	99	17	15,2	cyclictest	3965795	-21	kworker/u16:1+flush-8:0	12:18:23	6
3523936	99	17	15,2	cyclictest	3965795	-21	kworker/u16:1+events_unbound	12:24:46	6
3523936	99	17	15,2	cyclictest	3868347	-21	kworker/u16:1+events_unbound	10:24:48	6
3523936	99	17	15,2	cyclictest	3848983	-21	kworker/u16:3+events_unbound	11:01:33	6
3523936	99	17	15,2	cyclictest	3780792	-21	kworker/u16:2+events_unbound	09:21:27	6
3523936	99	17	15,2	cyclictest	3731872	-21	kworker/u16:3+events_unbound	08:59:47	6
3523928	99	17	15,2	cyclictest	3965795	-21	kworker/u16:1+events_unbound	11:17:01	4
3523928	99	17	15,2	cyclictest	3917047	-21	kworker/u16:0+events_unbound	10:30:16	4
3523928	99	17	15,2	cyclictest	3731872	-21	kworker/u16:3+flush-8:0	09:05:17	4
3523928	99	17	15,2	cyclictest	3625910	-21	kworker/u16:2+flush-8:0	08:05:33	4
3523928	99	17	15,2	cyclictest	3595801	-21	kworker/u16:0+events_unbound	07:55:14	4
3523928	99	17	15,2	cyclictest	3582640	-21	kworker/u16:3+events_unbound	08:20:13	4
3523928	99	17	14,2	cyclictest	3731872	-21	kworker/u16:3+events_unbound	08:55:04	4
3523940	99	16	8,7	cyclictest	5944	-21	gmain	09:45:17	7
3523940	99	16	13,2	cyclictest	0	-21	swapper/7	08:39:51	7
3523936	99	16	14,2	cyclictest	4159951	-21	kworker/u16:0+events_unbound	12:37:18	6
3523936	99	16	14,2	cyclictest	4111831	-21	kworker/u16:4+events_unbound	12:13:22	6
3523936	99	16	14,2	cyclictest	4043128	-21	kworker/u16:3+flush-8:0	11:34:41	6
3523936	99	16	14,2	cyclictest	3868347	-21	kworker/u16:1+events_unbound	10:46:53	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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