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 Mon Feb 02, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3102152	2	55	45,7	sleep5	0	-21	swapper/5	07:04:38	5
3102040	2	54	44,7	sleep6	0	-21	swapper/6	07:03:02	6
3102089	2	53	19,30	sleep7	0	-21	swapper/7	07:03:44	7
3102020	2	52	42,7	sleep4	0	-21	swapper/4	07:02:44	4
3102569	99	45	43,2	cyclictest	3351142	-21	kworker/u16:3+events_unbound	09:16:44	5
3102579	99	36	30,5	cyclictest	3670179	-21	latency_hist	11:26:29	7
3102569	99	36	32,3	cyclictest	3398419	-21	kworker/u16:6+flush-8:0	11:51:35	5
3102569	99	35	33,2	cyclictest	3183562	-21	kworker/u16:0+events_unbound	09:06:44	5
3102579	99	34	29,4	cyclictest	3351103	-21	latency_hist	09:11:30	7
3102569	99	33	31,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	12:11:54	5
3102569	99	33	31,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	10:06:55	5
3102575	99	32	30,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	11:31:44	6
3102569	99	32	30,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	09:46:59	5
3102579	99	31	29,1	cyclictest	3385434	-21	ssh	09:22:32	7
3102575	99	30	29,1	cyclictest	3446258	-21	kworker/u16:1+events_unbound	10:31:44	6
3102575	99	30	28,2	cyclictest	3398185	-21	kworker/u16:5+events_unbound	09:36:59	6
3102579	99	29	28,0	cyclictest	0	-21	swapper/7	09:12:30	7
3102569	99	29	27,2	cyclictest	3597443	-21	kworker/u16:0+events_unbound	10:56:57	5
3102569	99	29	27,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	11:11:42	5
3102579	99	28	28,0	cyclictest	0	-21	swapper/7	11:02:18	7
3102579	99	28	28,0	cyclictest	0	-21	swapper/7	09:29:18	7
3102579	99	28	1,2	cyclictest	3457606	-21	ssh	09:51:56	7
3102569	99	28	26,2	cyclictest	3135455	-21	kworker/u16:2+events_unbound	07:41:55	5
3102579	99	27	0,25	cyclictest	124	-21	kswapd0	12:21:53	7
3102569	99	27	25,2	cyclictest	3193760	-21	kworker/u16:1+flush-8:0	08:11:53	5
3102579	99	26	25,0	cyclictest	0	-21	swapper/7	09:16:32	7
3102579	99	26	24,1	cyclictest	0	-21	swapper/7	10:51:48	7
3102575	99	26	24,2	cyclictest	3446258	-21	kworker/u16:1+events_unbound	11:21:58	6
3102575	99	26	23,2	cyclictest	3619784	-21	kworker/u16:2+flush-8:0	11:36:50	6
3102575	99	26	22,3	cyclictest	3619784	-21	kworker/u16:2+flush-8:0	12:25:02	6
3102579	99	25	24,0	cyclictest	0	-21	swapper/7	09:04:48	7
3102579	99	25	24,0	cyclictest	0	-21	swapper/7	08:12:32	7
3102575	99	25	23,2	cyclictest	3582763	-21	kworker/u16:2+flush-8:0	10:51:56	6
3102575	99	25	23,2	cyclictest	3570363	-21	kworker/u16:0+events_unbound	10:46:49	6
3102569	99	25	23,2	cyclictest	3472822	-21	kworker/u16:0+events_unbound	10:16:53	5
3102569	99	25	23,2	cyclictest	3446258	-21	kworker/u16:1+events_unbound	11:47:36	5
3102569	99	25	23,2	cyclictest	3279744	-21	kworker/u16:2+events_unbound	09:36:55	5
3102569	99	25	23,2	cyclictest	3102751	-21	kworker/u16:0+events_unbound	07:21:45	5
3102579	99	24	23,0	cyclictest	0	-21	swapper/7	07:58:47	7
3102579	99	24	23,0	cyclictest	0	-21	swapper/7	07:58:47	7
3102575	99	24	22,2	cyclictest	3398185	-21	kworker/u16:5+flush-8:0	09:56:56	6
3102569	99	24	22,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	11:24:52	5
3102579	99	23	22,0	cyclictest	0	-21	swapper/7	08:48:04	7
3102579	99	23	22,0	cyclictest	0	-21	swapper/7	08:34:23	7
3102579	99	23	22,0	cyclictest	0	-21	swapper/7	08:23:32	7
3102579	99	23	22,0	cyclictest	0	-21	swapper/7	08:18:12	7
3102579	99	23	0,22	cyclictest	3643482	-21	ssh	11:12:04	7
3102575	99	23	20,2	cyclictest	3279744	-21	kworker/u16:2+flush-8:0	09:06:35	6
3102569	99	23	21,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	11:35:35	5
3102569	99	23	21,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	11:16:59	5
3102569	99	23	21,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	11:16:59	5
3102569	99	23	21,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	10:36:12	5
3102569	99	23	21,2	cyclictest	3164286	-21	kworker/u16:3+events_unbound	07:51:51	5
3102579	99	22	21,0	cyclictest	0	-21	swapper/7	08:45:20	7
3102579	99	22	21,0	cyclictest	0	-21	swapper/7	08:45:20	7
3102579	99	22	21,0	cyclictest	0	-21	swapper/7	07:11:24	7
3102579	99	22	20,1	cyclictest	3400948	-21	ssh	09:31:43	7
3102579	99	22	17,4	cyclictest	3484937	-21	latency_hist	10:06:30	7
3102575	99	22	19,2	cyclictest	3398419	-21	kworker/u16:6+flush-8:0	09:46:56	6
3102569	99	22	20,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	12:26:25	5
3102569	99	22	20,2	cyclictest	3279744	-21	kworker/u16:2+events_unbound	08:31:57	5
3102579	99	21	21,0	cyclictest	0	-21	swapper/7	11:42:30	7
3102579	99	21	21,0	cyclictest	0	-21	swapper/7	10:24:58	7
3102579	99	21	20,0	cyclictest	0	-21	swapper/7	07:54:04	7
3102579	99	21	16,4	cyclictest	3633795	-21	latency_hist	11:11:30	7
3102569	99	21	19,2	cyclictest	3183562	-21	kworker/u16:0+flush-8:0	09:06:25	5
3693498	2	20	0,1	chrt	3693499	-21	ssh	11:34:53	7
3102579	99	20	20,0	cyclictest	0	-21	swapper/7	12:16:37	7
3102579	99	20	20,0	cyclictest	0	-21	swapper/7	07:32:32	7
3102579	99	20	19,0	cyclictest	0	-21	swapper/7	08:07:43	7
3102579	99	20	1,17	cyclictest	3824510	-21	ssh	12:26:54	7
3102575	99	20	18,2	cyclictest	3398419	-21	kworker/u16:6+flush-8:0	11:51:56	6
3102569	99	20	18,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	12:16:53	5
3102569	99	20	18,2	cyclictest	3582763	-21	kworker/u16:2+events_unbound	10:49:26	5
3102569	99	20	18,2	cyclictest	3472822	-21	kworker/u16:0+events_unbound	10:23:30	5
3102569	99	20	18,2	cyclictest	3183562	-21	kworker/u16:0+events_unbound	09:21:43	5
3102569	99	20	18,2	cyclictest	3183562	-21	kworker/u16:0+events_unbound	08:16:54	5
3102579	99	19	18,0	cyclictest	0	-21	swapper/7	08:05:49	7
3102579	99	19	18,0	cyclictest	0	-21	swapper/7	07:14:59	7
3102575	99	19	15,3	cyclictest	3135455	-21	kworker/u16:2+flush-8:0	07:26:47	6
3102569	99	19	17,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	11:57:38	5
3102569	99	19	17,2	cyclictest	3398419	-21	kworker/u16:6+events_unbound	11:57:38	5
3102569	99	19	17,2	cyclictest	3398185	-21	kworker/u16:5+events_unbound	09:29:04	5
3102569	99	19	17,2	cyclictest	3212655	-21	kworker/u16:2+events_unbound	08:06:30	5
3102569	99	19	17,2	cyclictest	3164286	-21	kworker/u16:3+flush-8:0	07:46:59	5
3102579	99	18	17,0	cyclictest	0	-21	swapper/7	08:40:36	7
3102579	99	18	17,0	cyclictest	0	-21	swapper/7	08:30:40	7
3102579	99	18	17,0	cyclictest	0	-21	swapper/7	07:23:09	7
3102579	99	18	17,0	cyclictest	0	-21	swapper/7	07:20:29	7
3102579	99	18	16,1	cyclictest	0	-21	swapper/7	11:26:50	7
3102579	99	18	16,1	cyclictest	0	-21	swapper/7	07:26:56	7
3102569	99	18	16,2	cyclictest	3619784	-21	kworker/u16:2+events_unbound	11:10:50	5
3102569	99	18	16,2	cyclictest	3446258	-21	kworker/u16:1+events_unbound	11:37:32	5
3102569	99	18	16,2	cyclictest	3446258	-21	kworker/u16:1+events_unbound	10:31:19	5
3102569	99	18	16,2	cyclictest	3398185	-21	kworker/u16:5+events_unbound	09:35:20	5
3102579	99	17	7,9	cyclictest	0	-21	swapper/7	10:48:56	7
3102579	99	17	15,1	cyclictest	0	-21	swapper/7	08:57:13	7
3102579	99	17	0,1	cyclictest	0	-21	swapper/7	11:46:55	7
3102575	99	17	0,16	cyclictest	3233145	-21	cat	08:11:42	6
3102569	99	17	15,2	cyclictest	3446258	-21	kworker/u16:1+events_unbound	12:04:11	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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