OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Sat Nov 22, 2025 12:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3952065	2	145	0,2	chrt	586	-21	kworker/3:2+events	12:36:23	3
3865232	2	103	0,5	sleep3	0	-21	swapper/3	11:11:20	3
3708263	2	79	0,3	sleep2	39	-21	ksoftirqd/2	08:31:23	2
3622966	99	59	52,5	cyclictest	3804524	-21	kworker/u8:2+events_unbound	10:11:26	1
3622966	99	58	53,4	cyclictest	3858734	-21	kworker/u8:2+events_unbound	11:06:31	1
3622966	99	57	51,5	cyclictest	3689640	-21	kworker/u8:3+events_unbound	08:31:15	1
3622966	99	57	51,4	cyclictest	3894073	-21	kworker/u8:2+flush-8:0	12:06:31	1
3622961	99	57	47,7	cyclictest	3669610	-21	apt-get	07:55:00	0
3622966	99	56	50,5	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	09:06:41	1
3622966	99	56	50,4	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	09:51:18	1
3622966	99	55	49,4	cyclictest	3714450	-21	kworker/u8:1+events_unbound	10:51:15	1
3622966	99	55	48,5	cyclictest	3894073	-21	kworker/u8:2+events_unbound	12:11:20	1
3622966	99	54	47,5	cyclictest	3689640	-21	kworker/u8:3+flush-8:0	08:16:30	1
3622966	99	54	47,5	cyclictest	3689640	-21	kworker/u8:3+flush-8:0	08:16:30	1
3622966	99	54	47,5	cyclictest	3612947	-21	kworker/u8:4+events_unbound	07:21:31	1
3622966	99	54	46,6	cyclictest	3622762	-21	latency_hist	07:10:00	1
3622961	99	54	42,9	cyclictest	3634656	-21	apt-get	07:20:00	0
3622966	99	53	47,4	cyclictest	3612939	-21	kworker/u8:3+events_unbound	07:26:17	1
3622966	99	52	45,5	cyclictest	3714450	-21	kworker/u8:1+flush-8:0	10:31:25	1
3622961	99	52	47,3	cyclictest	3714450	-21	kworker/u8:1+events_unbound	10:06:19	0
3622961	99	52	42,7	cyclictest	3649710	-21	kworker/u8:1+flush-8:0	08:26:29	0
3622966	99	51	47,3	cyclictest	3858734	-21	kworker/u8:2+events_unbound	11:21:31	1
3622966	99	51	46,4	cyclictest	3843685	-21	kworker/u8:3+events_unbound	11:36:29	1
3622966	99	51	46,4	cyclictest	3843685	-21	kworker/u8:3+events_unbound	11:36:28	1
3622966	99	51	44,5	cyclictest	3649710	-21	kworker/u8:1+events_unbound	08:06:28	1
3622966	99	50	45,3	cyclictest	3903471	-21	kworker/u8:1+events_unbound	11:51:20	1
3622966	99	50	44,4	cyclictest	3602892	-21	kworker/u8:0+events_unbound	07:31:29	1
3622966	99	50	40,7	cyclictest	3653903	-21	ntpq	07:36:26	1
3622961	99	50	45,3	cyclictest	3714450	-21	kworker/u8:1+flush-8:0	09:06:45	0
3622966	99	49	44,4	cyclictest	3719436	-21	kworker/u8:3+flush-8:0	08:51:31	1
3622966	99	49	44,3	cyclictest	3843685	-21	kworker/u8:3+events_unbound	11:56:20	1
3622966	99	49	43,4	cyclictest	3804524	-21	kworker/u8:2+events_unbound	10:16:33	1
3622966	99	48	44,3	cyclictest	3689640	-21	kworker/u8:3+flush-8:0	08:36:48	1
3622966	99	48	42,5	cyclictest	3744378	-21	kworker/u8:2+events_unbound	09:11:26	1
3622966	99	48	42,5	cyclictest	3602892	-21	kworker/u8:0+events_unbound	07:51:32	1
3622966	99	48	41,4	cyclictest	3714450	-21	kworker/u8:1+events_unbound	09:01:20	1
3622968	99	47	40,5	cyclictest	3844379	-21	cp	10:50:01	2
3622966	99	47	43,3	cyclictest	3794687	-21	kworker/u8:3+flush-8:0	10:01:30	1
3622966	99	47	41,4	cyclictest	3858734	-21	kworker/u8:2+flush-8:0	11:26:26	1
3622966	99	46	42,3	cyclictest	3943309	-21	kworker/u8:2+flush-8:0	12:31:31	1
3622966	99	46	42,3	cyclictest	3917890	-21	kworker/u8:0+events_unbound	12:01:32	1
3622966	99	46	41,4	cyclictest	3714450	-21	kworker/u8:1+flush-8:0	09:16:34	1
3622966	99	46	39,5	cyclictest	3714450	-21	kworker/u8:1+events_unbound	11:01:27	1
3622961	99	46	40,4	cyclictest	3612947	-21	kworker/u8:4+events_unbound	07:11:29	0
3622961	99	46	39,5	cyclictest	3858734	-21	kworker/u8:2+events_unbound	11:26:29	0
3622966	99	45	40,3	cyclictest	3602892	-21	kworker/u8:0+events_unbound	09:46:35	1
3622966	99	45	37,6	cyclictest	3612939	-21	kworker/u8:3+events_unbound	07:16:30	1
3622966	99	45	33,10	cyclictest	3932583	-21	ntpq	12:16:27	1
3622961	99	45	34,8	cyclictest	3859002	-21	apt-get	11:05:00	0
3622966	99	44	39,4	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	10:26:26	1
3622966	99	44	36,6	cyclictest	282	-21	systemd-journal	09:35:00	1
3622968	99	43	37,4	cyclictest	3689640	-21	kworker/u8:3+events_unbound	08:21:30	2
3622966	99	43	38,4	cyclictest	3894073	-21	kworker/u8:2+flush-8:0	11:46:24	1
3622966	99	43	38,3	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	10:36:24	1
3622966	99	43	34,6	cyclictest	3627793	-21	latency_hist	07:15:01	1
3622966	99	43	32,8	cyclictest	3839302	-21	/usr/sbin/munin	10:46:25	1
3622966	99	42	36,5	cyclictest	3669887	-21	kworker/u8:2+events_unbound	08:01:17	1
3622961	99	42	33,6	cyclictest	3809240	-21	latency_hist	10:15:01	0
3622968	99	41	34,5	cyclictest	282	-21	systemd-journal	08:00:00	2
3622966	99	41	37,3	cyclictest	3843685	-21	kworker/u8:3+events_unbound	11:41:30	1
3622968	99	40	29,8	cyclictest	3892979	-21	ntpq	11:36:25	2
3622968	99	40	29,8	cyclictest	3892979	-21	ntpq	11:36:25	2
3622966	99	40	35,3	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	10:41:25	1
3622966	99	40	34,5	cyclictest	3689640	-21	kworker/u8:3+events_unbound	08:21:24	1
3622966	99	39	35,3	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	08:46:29	1
3622966	99	39	34,4	cyclictest	3749581	-21	kworker/u8:3+flush-8:0	09:36:29	1
3622966	99	39	34,3	cyclictest	3602892	-21	kworker/u8:0+events_unbound	07:41:27	1
3622966	99	39	26,10	cyclictest	282	-21	systemd-journal	09:21:38	1
3622961	99	39	32,5	cyclictest	3863353	-21	ntpq	11:06:26	0
3622966	99	38	34,3	cyclictest	3917890	-21	kworker/u8:0+flush-8:0	12:21:31	1
3622966	99	38	31,5	cyclictest	3858734	-21	kworker/u8:2+flush-8:0	11:31:26	1
3622966	99	38	31,5	cyclictest	3858734	-21	kworker/u8:2+flush-8:0	11:31:26	1
3646281	2	37	0,6	sleep3	45	1	irq_work/3	07:31:20	3
3622968	99	37	32,4	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	09:26:26	2
3622966	99	37	33,3	cyclictest	3943309	-21	kworker/u8:2+events_unbound	12:36:17	1
3622966	99	37	33,3	cyclictest	3928460	-21	kworker/u8:3+events_unbound	12:26:30	1
3622966	99	37	33,3	cyclictest	3858734	-21	kworker/u8:2+events_unbound	11:16:24	1
3622966	99	37	32,4	cyclictest	3714450	-21	kworker/u8:1+events_unbound	10:06:26	1
3622961	99	37	31,5	cyclictest	3928460	-21	kworker/u8:3+flush-8:0	12:31:33	0
3622961	99	37	29,6	cyclictest	3894073	-21	kworker/u8:2+flush-8:0	12:01:29	0
3622968	99	36	29,5	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	08:56:15	2
3622966	99	36	30,4	cyclictest	3868312	-21	ntpq	11:11:27	1
3622961	99	36	31,3	cyclictest	3689640	-21	kworker/u8:3+events_unbound	08:20:00	0
3622961	99	36	31,3	cyclictest	3689640	-21	kworker/u8:3+events_unbound	08:20:00	0
3622961	99	36	30,4	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	07:41:17	0
3622961	99	36	28,6	cyclictest	3759277	-21	latency_hist	09:25:01	0
3622961	99	36	24,9	cyclictest	282	-21	systemd-journal	07:48:39	0
3622968	99	35	27,7	cyclictest	3894073	-21	kworker/u8:2+events_unbound	11:51:31	2
3622966	99	35	30,4	cyclictest	3804524	-21	kworker/u8:2+flush-8:0	10:21:19	1
3622966	99	35	30,4	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	09:57:45	1
3622966	99	35	29,4	cyclictest	3714450	-21	kworker/u8:1+events_unbound	09:26:19	1
3622966	99	35	29,4	cyclictest	3602892	-21	kworker/u8:0+flush-8:0	07:46:36	1
3622966	99	35	26,7	cyclictest	3733237	-21	ntpq	08:56:25	1
3622961	99	35	31,3	cyclictest	3714450	-21	kworker/u8:1+flush-8:0	09:31:16	0
3622961	99	35	29,4	cyclictest	3943309	-21	kworker/u8:2+flush-8:0	12:36:30	0
3622961	99	35	29,4	cyclictest	3749581	-21	kworker/u8:3+flush-8:0	09:40:01	0
3622961	99	35	28,5	cyclictest	3843945	-21	latency_hist	10:50:01	0
3622961	99	35	26,7	cyclictest	282	-21	systemd-journal	09:00:00	0
3622968	99	34	23,8	cyclictest	282	-21	systemd-journal	10:09:59	2
3622966	99	34	28,5	cyclictest	3649710	-21	kworker/u8:1+events_unbound	08:26:20	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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