OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, 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.
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 rack0slot4s.osadl.org (updated Wed Aug 19, 2026 00:45:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3518659	99	73	71,2	cyclictest	3524374	-21	kworker/u32:2+flush-259:0	19:20:24	8
3614807	2	65	0,1	sleep4	0	-21	swapper/4	21:00:23	10
3518687	99	59	55,3	cyclictest	3788905	-21	kworker/u32:1+flush-259:0	23:40:14	4
3518686	99	51	50,1	cyclictest	3746832	-21	kworker/u32:3+flush-259:0	00:00:20	3
3518655	99	51	49,2	cyclictest	3788905	-21	kworker/u32:1+events_unbound	00:25:00	1
3517982	2	47	45,1	sleep0	0	-21	swapper/0	19:07:20	0
3517982	2	47	45,1	sleep0	0	-21	swapper/0	19:07:20	0
3518655	99	46	45,1	cyclictest	3619844	-21	kworker/u32:1+flush-259:0	21:50:20	1
3518655	99	46	45,1	cyclictest	3619844	-21	kworker/u32:1+flush-259:0	21:50:20	1
4189	98	45	0,43	rtkit-daemon	0	-21	swapper/2	19:07:07	8
4189	98	45	0,43	rtkit-daemon	0	-21	swapper/2	19:07:06	8
3518679	99	45	42,2	cyclictest	3615511	-21	kworker/u32:2+events_unbound	21:15:11	15
3518686	99	44	42,1	cyclictest	3746832	-21	kworker/u32:3+events_unbound	23:25:14	3
3518655	99	44	42,2	cyclictest	3820890	-21	kworker/u32:4+events_unbound	00:21:02	1
3518686	99	43	40,3	cyclictest	3544368	-21	kworker/u32:1+flush-259:0	20:20:22	3
3514706	2	43	41,1	sleep15	0	-21	swapper/15	19:05:11	7
3514706	2	43	41,1	sleep15	0	-21	swapper/15	19:05:10	7
3518692	99	42	41,1	cyclictest	3713652	-21	kworker/u32:2+flush-259:0	22:37:10	6
3518679	99	42	41,1	cyclictest	3746832	-21	kworker/u32:3+events_unbound	23:39:54	15
3518667	99	42	40,2	cyclictest	3820890	-21	kworker/u32:4+flush-259:0	23:50:49	11
3518652	99	42	40,2	cyclictest	3713652	-21	kworker/u32:2+flush-259:0	22:22:23	0
3518692	99	41	40,1	cyclictest	3615511	-21	kworker/u32:2+events_unbound	21:13:01	6
3518681	99	41	40,1	cyclictest	3784054	-21	kworker/u32:0+events_unbound	23:20:12	2
3518676	99	41	40,1	cyclictest	3805028	-21	kworker/u32:2+events_unbound	23:39:31	14
3518652	99	41	38,2	cyclictest	1161449	-21	thunderbird	22:39:47	0
3518028	2	41	39,1	sleep13	0	-21	swapper/13	19:07:50	5
3518028	2	41	39,1	sleep13	0	-21	swapper/13	19:07:50	5
3517977	2	41	38,2	sleep14	0	-21	swapper/14	19:07:19	6
3517977	2	41	38,2	sleep14	0	-21	swapper/14	19:07:18	6
3518692	99	40	4,11	cyclictest	0	-21	swapper/14	23:19:16	6
3518692	99	40	4,11	cyclictest	0	-21	swapper/14	22:13:23	6
3518691	99	40	38,2	cyclictest	3703152	-21	latency_hist	22:14:59	5
3518687	99	40	39,1	cyclictest	3611290	-21	kworker/u32:4+flush-259:0	21:40:26	4
3518681	99	40	39,1	cyclictest	3619844	-21	kworker/u32:1+events_unbound	22:20:20	2
3518679	99	40	38,2	cyclictest	3820890	-21	kworker/u32:4+events_unbound	00:25:21	15
3518665	99	40	38,2	cyclictest	3686735	-21	kworker/u32:4+flush-259:0	23:11:26	10
3518659	99	40	39,0	cyclictest	0	-21	swapper/2	22:20:31	8
3518037	2	40	38,1	sleep3	0	-21	swapper/3	19:07:56	9
3518037	2	40	38,1	sleep3	0	-21	swapper/3	19:07:55	9
3518692	99	39	38,1	cyclictest	3686735	-21	kworker/u32:4+events_unbound	22:44:19	6
3518692	99	39	37,2	cyclictest	3788905	-21	kworker/u32:1+events_unbound	23:55:18	6
3518692	99	39	3,11	cyclictest	0	-21	swapper/14	23:41:15	6
3518692	99	39	3,11	cyclictest	0	-21	swapper/14	00:25:10	6
3518692	99	39	14,1	cyclictest	1161449	-21	thunderbird	21:07:28	6
3518691	99	39	38,1	cyclictest	3837916	-21	kworker/u32:2+events_unbound	00:07:39	5
3518679	99	39	38,0	cyclictest	0	-21	swapper/9	19:19:06	15
3518679	99	39	37,2	cyclictest	3656802	-21	kworker/u32:2+events_unbound	22:05:22	15
3518665	99	39	37,2	cyclictest	3593377	-21	kworker/u32:1+flush-259:0	20:55:21	10
3518660	99	39	4,3	cyclictest	3318	-21	Xorg	23:40:26	9
3518659	99	39	9,1	cyclictest	0	-21	swapper/2	19:33:49	8
3518655	99	39	37,1	cyclictest	3713652	-21	kworker/u32:2+events_unbound	23:05:04	1
3518652	99	39	37,2	cyclictest	3611290	-21	kworker/u32:4+events_unbound	21:09:30	0
3518150	2	39	36,2	sleep9	0	-21	swapper/9	19:09:06	15
3518150	2	39	36,2	sleep9	0	-21	swapper/9	19:09:05	15
3518692	99	38	36,2	cyclictest	3820890	-21	kworker/u32:4+events_unbound	00:30:14	6
3518692	99	38	3,10	cyclictest	0	-21	swapper/14	00:03:13	6
3518692	99	38	2,11	cyclictest	0	-21	swapper/14	23:30:16	6
3518660	99	38	36,2	cyclictest	3686735	-21	kworker/u32:4+flush-259:0	22:28:04	9
3518660	99	38	35,2	cyclictest	3837916	-21	kworker/u32:2+events_unbound	00:18:19	9
3517839	2	38	36,1	sleep12	0	-21	swapper/12	19:05:40	4
3517839	2	38	36,1	sleep12	0	-21	swapper/12	19:05:39	4
3517832	2	38	36,1	sleep6	0	-21	swapper/6	19:05:34	12
3517832	2	38	36,1	sleep6	0	-21	swapper/6	19:05:33	12
3515897	2	38	36,1	sleep1	0	-21	swapper/1	19:05:13	1
3515897	2	38	36,1	sleep1	0	-21	swapper/1	19:05:12	1
3514698	2	38	31,2	sleep8	0	-21	swapper/8	19:05:04	14
3514698	2	38	31,2	sleep8	0	-21	swapper/8	19:05:03	14
3518692	99	37	36,1	cyclictest	3805028	-21	kworker/u32:2+flush-259:0	23:38:59	6
3518692	99	37	35,2	cyclictest	0	-21	swapper/14	20:55:15	6
3518692	99	37	1,11	cyclictest	0	-21	swapper/14	23:52:14	6
3518692	99	37	1,11	cyclictest	0	-21	swapper/14	00:14:12	6
3518691	99	37	11,25	cyclictest	3686735	-21	kworker/u32:4+events_unbound	22:08:59	5
3518679	99	37	35,2	cyclictest	3662547	-21	kworker/u32:3+events_unbound	21:44:17	15
3518676	99	37	36,1	cyclictest	3581963	-21	kworker/u32:4+events_unbound	20:30:23	14
3518670	99	37	33,3	cyclictest	3746832	-21	kworker/u32:3+flush-259:0	23:40:52	12
3518670	99	37	3,28	cyclictest	3318	-21	Xorg	22:25:49	12
3518655	99	37	36,1	cyclictest	3611290	-21	kworker/u32:4+events_unbound	21:30:17	1
3518692	99	36	0,11	cyclictest	0	-21	swapper/14	19:17:39	6
3518691	99	36	25,11	cyclictest	1774	-21	snmpd	19:54:32	5
3518686	99	36	35,1	cyclictest	3746832	-21	kworker/u32:3+flush-259:0	22:55:22	3
3518679	99	36	35,1	cyclictest	3695806	-21	kworker/u32:3+events_unbound	22:24:07	15
3518676	99	36	36,0	cyclictest	0	-21	swapper/8	22:06:37	14
3518676	99	36	35,1	cyclictest	3686735	-21	kworker/u32:4+events_unbound	23:15:25	14
3518670	99	36	2,34	cyclictest	1161449	-21	thunderbird	00:17:57	12
3518659	99	36	35,1	cyclictest	3611290	-21	kworker/u32:4+flush-259:0	21:35:20	8
3518659	99	36	35,1	cyclictest	3578086	-21	kworker/2:1-events	20:28:59	8
3518655	99	36	35,1	cyclictest	3837916	-21	kworker/u32:2+flush-259:0	00:16:43	1
3518652	99	36	0,2	cyclictest	0	-21	swapper/0	22:41:41	0
3518024	2	36	34,1	sleep11	0	-21	swapper/11	19:07:48	3
3518024	2	36	34,1	sleep11	0	-21	swapper/11	19:07:47	3
3517944	2	36	34,1	sleep10	0	-21	swapper/10	19:06:59	2
3517944	2	36	34,1	sleep10	0	-21	swapper/10	19:06:58	2
3518691	99	35	11,15	cyclictest	3686735	-21	kworker/u32:4+events_unbound	22:38:51	5
3518686	99	35	33,2	cyclictest	3788905	-21	kworker/u32:1+events_unbound	23:30:18	3
3518686	99	35	33,2	cyclictest	3619844	-21	kworker/u32:1+flush-259:0	21:49:48	3
3518679	99	35	34,1	cyclictest	3572408	-21	kworker/u32:2+flush-259:0	20:55:23	15
3518676	99	35	34,1	cyclictest	3318	-21	Xorg	23:44:59	14
3518676	99	35	33,2	cyclictest	0	-21	swapper/8	21:16:58	14
3518659	99	35	4,30	cyclictest	43	-21	ksoftirqd/2	22:16:54	8
3518659	99	35	35,0	cyclictest	0	-21	swapper/2	19:12:07	8
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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