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 Mon Apr 27, 2026 00:44:14)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3763235	99	58	52,4	cyclictest	3953680	-21	kworker/u8:2+events_unbound	00:31:24	1
3763230	99	56	47,6	cyclictest	4077953	-21	latency_hist	00:25:01	0
3763235	99	53	48,3	cyclictest	3844268	-21	kworker/u8:1+events_unbound	22:26:24	1
3763235	99	53	46,5	cyclictest	3953680	-21	kworker/u8:2+flush-8:0	23:01:09	1
3763235	99	52	47,3	cyclictest	3844268	-21	kworker/u8:1+events_unbound	22:01:21	1
3763235	99	52	46,5	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	20:31:24	1
3763235	99	52	46,4	cyclictest	3863837	-21	kworker/u8:0+flush-8:0	21:01:09	1
3763235	99	52	46,4	cyclictest	3414746	-21	kworker/u8:0+flush-8:0	19:15:04	1
3763235	99	51	46,4	cyclictest	3844268	-21	kworker/u8:1+events_unbound	21:31:11	1
3763235	99	51	43,6	cyclictest	3768163	-21	latency_hist	19:15:01	1
3763240	99	50	40,7	cyclictest	3894188	-21	cat	21:20:01	2
3763235	99	50	45,4	cyclictest	2935746	-21	kworker/u8:3+events_unbound	20:01:19	1
3763235	99	50	45,3	cyclictest	4033402	-21	kworker/u8:1+flush-8:0	00:21:25	1
3763235	99	50	44,4	cyclictest	3839307	-21	latency_hist	20:25:01	1
3763235	99	50	43,5	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	20:41:21	1
3763235	99	49	45,3	cyclictest	2935746	-21	kworker/u8:3+events_unbound	19:21:18	1
3763235	99	49	44,4	cyclictest	4012966	-21	kworker/u8:3+flush-8:0	23:31:18	1
3763235	99	49	44,4	cyclictest	3953680	-21	kworker/u8:2+events_unbound	22:46:25	1
3763235	99	49	43,5	cyclictest	2935746	-21	kworker/u8:3+events_unbound	19:46:24	1
3763235	99	49	36,9	cyclictest	280	-21	systemd-journal	00:28:37	1
3763230	99	49	43,4	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	19:31:10	0
3763230	99	49	42,5	cyclictest	3992363	-21	ntpq	22:56:20	0
3763235	99	48	43,3	cyclictest	3888136	-21	kworker/u8:3+events_unbound	22:16:22	1
3763235	99	48	42,5	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	20:16:19	1
3763235	99	47	43,3	cyclictest	3844268	-21	kworker/u8:1+events_unbound	21:21:20	1
3763235	99	47	42,4	cyclictest	3963192	-21	kworker/u8:0+flush-8:0	22:36:08	1
3763235	99	47	40,5	cyclictest	3953680	-21	kworker/u8:2+flush-8:0	22:51:18	1
3763235	99	46	40,4	cyclictest	3953680	-21	kworker/u8:2+events_unbound	00:06:23	1
3763230	99	46	38,6	cyclictest	3763476	-21	/usr/sbin/munin	19:11:24	0
3763230	99	46	36,8	cyclictest	4032033	-21	ntpq	23:36:16	0
3763235	99	45	40,4	cyclictest	3953680	-21	kworker/u8:2+events_unbound	22:41:17	1
3763235	99	45	40,4	cyclictest	2935746	-21	kworker/u8:3+events_unbound	19:31:21	1
3763235	99	45	39,5	cyclictest	3953680	-21	kworker/u8:2+events_unbound	23:16:07	1
3763235	99	45	38,5	cyclictest	4033402	-21	kworker/u8:1+flush-8:0	00:11:23	1
3763230	99	45	41,3	cyclictest	3888136	-21	kworker/u8:3+events_unbound	21:16:22	0
3837131	2	44	0,3	sleep2	37	1	rcuc/2	20:21:14	2
3763235	99	44	38,5	cyclictest	4033402	-21	kworker/u8:1+events_unbound	23:41:16	1
3763235	99	44	38,5	cyclictest	3953680	-21	kworker/u8:2+flush-8:0	23:56:19	1
3763235	99	44	38,4	cyclictest	3953680	-21	kworker/u8:2+flush-8:0	00:36:20	1
3763235	99	44	38,4	cyclictest	3888136	-21	kworker/u8:3+events_unbound	21:11:22	1
3763235	99	44	37,6	cyclictest	3953680	-21	kworker/u8:2+flush-8:0	22:56:19	1
3763230	99	44	38,4	cyclictest	3863837	-21	kworker/u8:0+events_unbound	21:01:15	0
3763235	99	43	39,3	cyclictest	3903915	-21	kworker/u8:0+flush-8:0	21:46:23	1
3763235	99	43	38,3	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	21:06:24	1
3763235	99	43	37,4	cyclictest	3932991	-21	ntpq	21:56:18	1
3763230	99	43	39,3	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	19:36:25	0
3763230	99	43	39,3	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	19:36:25	0
3763235	99	42	38,3	cyclictest	3863837	-21	kworker/u8:0+events_unbound	20:51:07	1
3763235	99	42	37,4	cyclictest	3903915	-21	kworker/u8:0+flush-8:0	21:51:21	1
3763235	99	42	37,3	cyclictest	3953680	-21	kworker/u8:2+flush-8:0	23:46:11	1
3763235	99	42	36,4	cyclictest	3963192	-21	kworker/u8:0+events_unbound	23:11:24	1
3763235	99	42	36,4	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	19:41:19	1
3763235	99	42	36,4	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	19:41:19	1
3763235	99	42	34,6	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	20:26:20	1
3763235	99	42	32,8	cyclictest	3957709	-21	ntpq	22:21:16	1
3763230	99	42	38,3	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	20:11:21	0
3763230	99	42	37,4	cyclictest	3844268	-21	kworker/u8:1+flush-8:0	21:56:08	0
3763230	99	42	32,7	cyclictest	280	-21	systemd-journal	21:42:38	0
3763235	99	41	36,4	cyclictest	4033402	-21	kworker/u8:1+events_unbound	00:01:07	1
3763235	99	41	35,4	cyclictest	3888136	-21	kworker/u8:3+flush-8:0	21:16:08	1
3763230	99	41	31,8	cyclictest	3823579	-21	ntpq	20:06:16	0
3763235	99	40	36,3	cyclictest	3762799	-21	kworker/u8:2+events_unbound	20:46:11	1
3763235	99	40	35,4	cyclictest	3903915	-21	kworker/u8:0+events_unbound	21:40:01	1
3763235	99	40	35,4	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	19:26:10	1
3763235	99	40	35,3	cyclictest	3942939	-21	ntpq	22:06:19	1
3763235	99	40	34,5	cyclictest	3762799	-21	kworker/u8:2+events_unbound	19:36:18	1
3763235	99	40	34,5	cyclictest	3762799	-21	kworker/u8:2+events_unbound	19:36:18	1
3763235	99	40	33,6	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	21:26:20	1
3763235	99	38	33,4	cyclictest	3888136	-21	kworker/u8:3+flush-8:0	22:11:09	1
3763235	99	38	31,5	cyclictest	3844268	-21	kworker/u8:1+flush-8:0	23:06:17	1
3763235	99	38	30,6	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	20:11:16	1
3763230	99	38	31,6	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	20:26:24	0
3763235	99	37	34,2	cyclictest	3963192	-21	kworker/u8:0+flush-8:0	23:36:22	1
3763235	99	37	31,4	cyclictest	3844268	-21	kworker/u8:1+flush-8:0	21:41:23	1
3763235	99	37	25,9	cyclictest	4022816	-21	latency_hist	23:30:01	1
3763230	99	37	33,3	cyclictest	3844268	-21	kworker/u8:1+events_unbound	21:21:13	0
3763230	99	37	31,5	cyclictest	4033402	-21	kworker/u8:1+events_unbound	00:11:09	0
3763230	99	37	30,5	cyclictest	3963192	-21	kworker/u8:0+flush-8:0	23:11:17	0
3762848	2	37	4,11	sleep1	0	-21	swapper/1	19:07:26	1
3763235	99	36	32,3	cyclictest	4013998	-21	irqrtprio	23:21:12	1
3763230	99	36	31,4	cyclictest	3414746	-21	kworker/u8:0+events_unbound	19:15:03	0
3763230	99	36	31,3	cyclictest	2935746	-21	kworker/u8:3+events_unbound	19:21:08	0
3763230	99	36	29,5	cyclictest	4048029	-21	apt-get	23:55:01	0
3763240	99	35	26,7	cyclictest	4023233	-21	cat	23:30:01	2
3763235	99	35	30,4	cyclictest	4033402	-21	kworker/u8:1+flush-8:0	00:16:22	1
3763235	99	35	29,4	cyclictest	3953680	-21	kworker/u8:2+events_unbound	22:31:14	1
3763230	99	35	26,7	cyclictest	3849294	-21	cat	20:35:01	0
3763235	99	34	28,5	cyclictest	2935746	-21	kworker/u8:3+flush-8:0	19:56:19	1
3763235	99	34	26,6	cyclictest	3762799	-21	kworker/u8:2+flush-8:0	19:51:21	1
3763230	99	34	27,5	cyclictest	280	-21	systemd-journal	19:30:00	0
3763240	99	33	24,7	cyclictest	4048113	-21	cat	23:55:00	2
3763240	99	33	23,8	cyclictest	4073005	-21	/usr/sbin/munin	00:20:00	2
4067148	2	32	0,3	sleep3	75	-21	kworker/3:1+events	00:11:17	3
3763240	99	32	26,4	cyclictest	4032924	-21	apt-get	23:40:00	2
3763230	99	32	30,1	cyclictest	3762799	-21	kworker/u8:2+events_unbound	20:36:23	0
3763230	99	32	28,2	cyclictest	280	-21	systemd-journal	23:10:00	0
3763230	99	32	27,3	cyclictest	2935746	-21	kworker/u8:3+events_unbound	19:46:20	0
3763230	99	32	24,6	cyclictest	3903915	-21	kworker/u8:0+events_unbound	21:51:17	0
3763230	99	32	22,8	cyclictest	280	-21	systemd-journal	22:30:00	0
3762926	2	32	4,9	sleep2	0	-21	swapper/2	19:08:27	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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