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 02, 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
3997550	2	94	0,1	sleep6	0	-21	swapper/6	21:34:01	6
3699409	99	48	45,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	21:54:30	4
3698815	2	47	37,7	sleep4	0	-21	swapper/4	19:04:57	4
3699409	99	46	44,2	cyclictest	96383	-21	kworker/u16:3+events_unbound	23:59:31	4
3699024	2	46	11,30	sleep7	0	-21	swapper/7	19:07:57	7
3699418	99	45	0,43	cyclictest	217923	-21	latency_hist	00:24:01	7
3699409	99	45	43,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	22:54:03	4
3699418	99	44	39,4	cyclictest	3936585	-21	latency_hist	21:09:01	7
3698874	2	41	31,7	sleep5	0	-21	swapper/5	19:05:46	5
3699409	99	36	34,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	23:19:02	4
3699409	99	36	34,2	cyclictest	4165367	-21	kworker/u16:0+events_unbound	22:40:34	4
3699409	99	36	34,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	21:52:10	4
3699418	99	35	0,33	cyclictest	4055566	-21	sed	21:54:30	7
3699409	99	35	33,2	cyclictest	69499	-21	kworker/u16:2+flush-8:0	23:27:46	4
3699409	99	35	33,2	cyclictest	3961018	-21	kworker/u16:3+events_unbound	21:38:15	4
3699409	99	35	33,2	cyclictest	230408	-21	kworker/u16:0+events_unbound	00:32:11	4
3698817	2	35	24,8	sleep6	0	-21	swapper/6	19:04:59	6
3699409	99	34	33,1	cyclictest	69499	-21	kworker/u16:2+events_unbound	23:37:46	4
3699409	99	34	32,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	23:33:00	4
3699409	99	34	32,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	23:00:30	4
3699409	99	34	32,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	00:37:43	4
3699409	99	34	32,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	00:16:43	4
3699409	99	34	32,2	cyclictest	4165367	-21	kworker/u16:0+events_unbound	23:13:39	4
3699409	99	34	32,2	cyclictest	4165367	-21	kworker/u16:0+events_unbound	23:13:39	4
3699409	99	34	32,2	cyclictest	4143834	-21	kworker/u16:1+events_unbound	22:35:39	4
3699409	99	34	32,2	cyclictest	3961018	-21	kworker/u16:3+events_unbound	21:46:47	4
3699409	99	34	32,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	22:52:15	4
3699409	99	34	32,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	21:40:59	4
3699409	99	34	32,2	cyclictest	3706011	-21	kworker/u16:3+events_unbound	19:09:32	4
3699409	99	33	32,1	cyclictest	3961018	-21	kworker/u16:3+events_unbound	22:22:19	4
3699409	99	33	31,2	cyclictest	96383	-21	kworker/u16:3+events_unbound	23:50:26	4
3699409	99	33	31,2	cyclictest	96383	-21	kworker/u16:3+events_unbound	23:46:06	4
3699409	99	33	31,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	23:56:14	4
3699409	99	33	31,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	22:15:19	4
3699409	99	33	31,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	21:30:20	4
3699409	99	33	31,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	21:27:44	4
3699409	99	33	31,2	cyclictest	195109	-21	kworker/u16:3+events_unbound	00:28:50	4
3699409	99	32	30,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	00:21:11	4
3699409	99	32	30,2	cyclictest	4165367	-21	kworker/u16:0+events_unbound	23:05:19	4
3699409	99	32	30,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	22:33:59	4
3699409	99	32	30,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	21:11:31	4
3699409	99	32	30,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	22:27:03	4
3699409	99	32	30,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	21:23:55	4
3699418	99	31	30,0	cyclictest	0	-21	swapper/7	20:09:23	7
3699418	99	31	30,0	cyclictest	0	-21	swapper/7	19:14:02	7
3699418	99	31	25,5	cyclictest	3858783	-21	latency_hist	20:29:01	7
3699418	99	31	25,5	cyclictest	3858783	-21	latency_hist	20:29:01	7
3699409	99	31	29,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	00:11:58	4
3699409	99	31	29,2	cyclictest	4165367	-21	kworker/u16:0+events_unbound	22:48:40	4
3699409	99	31	29,2	cyclictest	3961018	-21	kworker/u16:3+flush-8:0	21:59:39	4
3699409	99	31	29,2	cyclictest	3937012	-21	kworker/u16:1+events_unbound	21:17:19	4
4155730	2	30	0,1	chrt	0	-21	swapper/6	22:39:01	6
3879974	2	30	0,1	sleep4	63	1	rcuc/4	20:39:19	4
3699418	99	30	29,0	cyclictest	0	-21	swapper/7	21:14:39	7
3930803	2	29	0,1	chrt	0	-21	swapper/4	21:04:18	4
3699418	99	29	28,0	cyclictest	0	-21	swapper/7	22:23:30	7
3699418	99	29	27,1	cyclictest	4006777	-21	switchtime	21:34:31	7
3699416	99	29	27,2	cyclictest	3645107	-21	kworker/u16:0+flush-8:0	19:39:27	6
3699409	99	29	27,2	cyclictest	96383	-21	kworker/u16:3+events_unbound	23:41:03	4
3699409	99	29	27,2	cyclictest	4192535	-21	kworker/u16:1+events_unbound	23:18:48	4
3699409	99	29	27,2	cyclictest	3670719	-21	kworker/u16:2+events_unbound	19:18:12	4
3699409	99	28	26,2	cyclictest	3961018	-21	kworker/u16:3+events_unbound	22:08:48	4
3699409	99	28	26,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	20:09:04	4
71871	2	27	0,1	chrt	71870	-21	ssh	23:23:58	7
3699409	99	27	25,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	22:11:48	4
129592	2	27	0,1	chrt	129578	-21	ssh	23:44:25	7
3699418	99	26	25,0	cyclictest	0	-21	swapper/7	22:46:31	7
3699409	99	26	24,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	20:36:12	4
3699409	99	26	24,2	cyclictest	166771	-21	kworker/u16:5+events_unbound	00:05:23	4
3699418	99	25	24,0	cyclictest	0	-21	swapper/7	21:24:31	7
3699418	99	25	23,1	cyclictest	0	-21	swapper/7	23:31:24	7
3699409	99	25	23,2	cyclictest	3781044	-21	kworker/u16:2+events_unbound	19:52:12	4
3699409	99	25	23,2	cyclictest	3670719	-21	kworker/u16:2+events_unbound	19:26:11	4
3699409	99	25	23,2	cyclictest	3645107	-21	kworker/u16:0+events_unbound	19:40:11	4
3699409	99	25	22,2	cyclictest	3742448	-21	kworker/u16:1+events_unbound	19:44:11	4
3699418	99	24	22,1	cyclictest	167	50	irq/16-ehci_hcd:usb4	00:33:50	7
3699409	99	24	22,2	cyclictest	3868875	-21	kworker/u16:3+events_unbound	20:50:11	4
3699409	99	24	22,2	cyclictest	3742448	-21	kworker/u16:1+events_unbound	19:59:01	4
3699418	99	23	21,1	cyclictest	106	-21	kcompactd0	22:29:06	7
3699409	99	23	21,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	21:04:01	4
3699418	99	22	21,0	cyclictest	0	-21	swapper/7	22:10:12	7
3699418	99	22	21,0	cyclictest	0	-21	swapper/7	21:44:10	7
3699418	99	22	21,0	cyclictest	0	-21	swapper/7	00:37:10	7
3699418	99	22	0,20	cyclictest	5934	-21	gnome-shell	00:27:10	7
3699418	99	21	20,0	cyclictest	0	-21	swapper/7	23:58:54	7
3699418	99	21	20,0	cyclictest	0	-21	swapper/7	22:14:36	7
3699418	99	21	20,0	cyclictest	0	-21	swapper/7	21:51:03	7
3699418	99	21	19,1	cyclictest	167	50	irq/16-ehci_hcd:usb4	21:32:03	7
3699418	99	21	17,3	cyclictest	167	50	irq/16-ehci_hcd:usb4	22:43:03	7
3699409	99	21	19,2	cyclictest	3809914	-21	kworker/u16:0+events_unbound	20:55:00	4
3699418	99	20	17,2	cyclictest	3972674	-21	ssh	21:23:07	7
3699418	99	20	17,2	cyclictest	3868494	-21	perf	20:34:01	7
3699418	99	20	17,2	cyclictest	3781010	-21	munin-run	19:49:01	7
3699409	99	20	18,2	cyclictest	2993921	-21	kworker/u16:7+events_unbound	20:00:03	4
3699418	99	19	18,0	cyclictest	0	-21	swapper/7	23:37:30	7
3699418	99	19	17,1	cyclictest	0	-21	swapper/7	22:49:06	7
3699418	99	19	14,4	cyclictest	3751801	-21	latency_hist	19:34:01	7
3699418	99	18	17,0	cyclictest	0	-21	swapper/7	23:15:59	7
3699418	99	18	17,0	cyclictest	0	-21	swapper/7	23:10:16	7
3699418	99	18	17,0	cyclictest	0	-21	swapper/7	23:10:16	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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