OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Tue Jul 21, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3418014	99	48	44,3	cyclictest	3657550	-21	kworker/u8:0+events_unbound	11:15:01	0
3418014	99	45	39,4	cyclictest	3626126	-21	latency_hist	10:30:01	0
3418024	99	44	38,4	cyclictest	335557	-21	systemd-journal	10:00:19	3
3418020	99	40	35,3	cyclictest	335557	-21	systemd-journal	08:35:00	2
3418018	99	40	35,3	cyclictest	3438847	-21	/usr/sbin/munin	07:30:24	1
3418014	99	40	35,4	cyclictest	3521832	-21	kworker/u8:3+flush-259:0	09:20:00	0
3418018	99	39	32,5	cyclictest	3694561	-21	latency_hist	11:35:00	1
3418014	99	36	31,3	cyclictest	3657550	-21	kworker/u8:0+events_unbound	11:25:20	0
3418024	99	35	30,4	cyclictest	3469529	-21	apt-get	08:00:01	3
3418014	99	35	31,2	cyclictest	3374825	-21	kworker/u8:1+flush-259:0	07:50:22	0
3418020	99	34	28,4	cyclictest	3537340	-21	apt-get	09:05:12	2
3418018	99	34	28,4	cyclictest	3746508	-21	apt-get	12:25:12	1
3418014	99	34	30,3	cyclictest	3427550	-21	kworker/u8:3+flush-259:0	07:24:59	0
3418014	99	33	29,3	cyclictest	3589820	-21	kworker/u8:0+events_unbound	10:15:18	0
3418014	99	33	29,3	cyclictest	3454323	-21	kworker/u8:2+events_unbound	08:05:19	0
3418014	99	33	29,3	cyclictest	3427550	-21	kworker/u8:3+events_unbound	07:15:27	0
3418014	99	33	29,3	cyclictest	3418205	-21	kworker/u8:0+events_unbound	07:10:18	0
3418024	99	31	26,3	cyclictest	3684235	-21	latency_hist	11:25:01	3
3418014	99	31	27,3	cyclictest	3448781	-21	kworker/u8:0+events_unbound	07:55:20	0
3418014	99	31	26,4	cyclictest	3730910	-21	apt-get	12:10:13	0
3418020	99	30	26,3	cyclictest	3710057	-21	kworker/u8:1+flush-259:0	11:55:20	2
3418014	99	30	27,2	cyclictest	3563308	-21	kworker/u8:4+flush-259:0	09:40:15	0
3418018	99	29	26,2	cyclictest	3374825	-21	kworker/u8:1+flush-259:0	07:40:23	1
3418018	99	29	25,3	cyclictest	3563950	-21	apt-get	09:30:13	1
3418018	99	29	23,4	cyclictest	3433695	-21	/usr/sbin/munin	07:25:16	1
3418014	99	29	26,2	cyclictest	3589820	-21	kworker/u8:0+flush-259:0	10:44:59	0
3418014	99	29	25,3	cyclictest	3725720	-21	kworker/u8:2+events_unbound	12:35:19	0
3418014	99	29	25,3	cyclictest	3454323	-21	kworker/u8:2+events_unbound	08:05:00	0
3418024	99	28	23,4	cyclictest	335557	-21	systemd-journal	12:15:00	3
3418014	99	28	25,2	cyclictest	3605706	-21	kworker/u8:3+flush-259:0	10:20:10	0
3418014	99	28	24,3	cyclictest	3725720	-21	kworker/u8:2+flush-259:0	12:20:23	0
3418024	99	27	24,2	cyclictest	3657550	-21	kworker/u8:0+flush-259:0	11:50:17	3
3418024	99	27	23,3	cyclictest	3459508	-21	apt-get	07:50:10	3
3418020	99	27	23,3	cyclictest	3500992	-21	kworker/u8:0+flush-259:0	08:35:17	2
3418020	99	27	21,4	cyclictest	509	-21	rs:main		2
3418018	99	27	12,6	cyclictest	3579217	-21	latency_hist	09:45:00	1
3418014	99	27	24,2	cyclictest	3710057	-21	kworker/u8:1+events_unbound	12:15:19	0
3418014	99	27	23,3	cyclictest	3626097	-21	kworker/u8:2+flush-259:0	10:30:20	0
3418014	99	27	23,3	cyclictest	3521832	-21	kworker/u8:3+flush-259:0	09:05:19	0
3418014	99	27	23,3	cyclictest	3490884	-21	apt-get	08:20:14	0
3418020	99	26	22,3	cyclictest	3579445	-21	kworker/u8:0+flush-259:0	09:45:19	2
3418020	99	26	22,3	cyclictest	3469225	-21	kworker/u8:3+flush-259:0	08:15:21	2
3418018	99	26	23,2	cyclictest	3710057	-21	kworker/u8:1+events_unbound	12:05:25	1
3418018	99	26	20,5	cyclictest	3469531	-21	latency_hist	08:00:01	1
3418014	99	26	22,3	cyclictest	3657550	-21	kworker/u8:0+events_unbound	12:00:22	0
3418014	99	26	22,3	cyclictest	3657550	-21	kworker/u8:0+events_unbound	11:40:23	0
3418014	99	26	22,3	cyclictest	3506355	-21	kworker/u8:1+events_unbound	09:00:23	0
3418014	99	26	20,4	cyclictest	3506366	-21	/usr/sbin/munin	08:35:16	0
3418018	99	25	23,1	cyclictest	3527060	-21	apt-get	08:55:13	1
3418014	99	25	21,3	cyclictest	3710057	-21	kworker/u8:1+events_unbound	12:07:20	0
3418014	99	25	21,3	cyclictest	3521832	-21	kworker/u8:3+flush-259:0	09:25:24	0
3418014	99	25	21,3	cyclictest	3427550	-21	kworker/u8:3+events_unbound	07:35:12	0
3418024	99	24	21,2	cyclictest	3521832	-21	kworker/u8:3+flush-259:0	09:25:00	3
3418024	99	24	20,3	cyclictest	3454323	-21	kworker/u8:2+flush-259:0	08:20:22	3
3418020	99	24	18,4	cyclictest	3647202	-21	latency_hist	10:50:00	2
3418020	99	24	18,4	cyclictest	3636653	-21	cp	10:40:01	2
3418014	99	24	21,2	cyclictest	3725720	-21	kworker/u8:2+events_unbound	12:25:14	0
3418014	99	24	21,2	cyclictest	3598940	-21	kworker/u8:2+events_unbound	10:05:22	0
3418014	99	24	21,2	cyclictest	3589820	-21	kworker/u8:0+flush-259:0	10:45:23	0
3418014	99	24	20,3	cyclictest	3652022	-21	kworker/u8:3+events_unbound	11:00:22	0
3418014	99	24	20,3	cyclictest	3454323	-21	kworker/u8:2+events_unbound	07:45:18	0
3418014	99	24	20,3	cyclictest	3374825	-21	kworker/u8:1+flush-259:0	07:30:20	0
3418014	99	24	18,5	cyclictest	3594747	-21	latency_hist	10:00:01	0
3418014	99	24	18,5	cyclictest	3594747	-21	latency_hist	10:00:01	0
3418024	99	23	19,3	cyclictest	335557	-21	systemd-journal	10:24:59	3
3418024	99	23	18,3	cyclictest	3600162	-21	apt-get	10:05:13	3
3418014	99	23	20,2	cyclictest	3652022	-21	kworker/u8:3+flush-259:0	11:55:25	0
3418024	99	22	18,3	cyclictest	3652022	-21	kworker/u8:3+flush-259:0	11:05:17	3
3418020	99	22	19,2	cyclictest	3506355	-21	kworker/u8:1+flush-259:0	08:55:18	2
3418020	99	22	17,4	cyclictest	335557	-21	systemd-journal	08:44:19	2
3418018	99	22	17,4	cyclictest	3626097	-21	kworker/u8:2+flush-259:0	11:35:26	1
3418018	99	22	10,3	cyclictest	3679299	-21	apt-get	11:20:12	1
3418014	99	22	19,2	cyclictest	3626097	-21	kworker/u8:2+events_unbound	11:15:23	0
3418014	99	22	19,2	cyclictest	3573833	-21	kworker/u8:1+events_unbound	10:00:16	0
3418014	99	22	19,2	cyclictest	3521832	-21	kworker/u8:3+flush-259:0	09:24:44	0
3418014	99	22	19,2	cyclictest	3454323	-21	kworker/u8:2+events_unbound	08:29:17	0
3418014	99	22	19,2	cyclictest	3448781	-21	kworker/u8:0+events_unbound	08:10:27	0
3418020	99	21	18,2	cyclictest	3657550	-21	kworker/u8:0+flush-259:0	11:30:01	2
3418020	99	21	17,3	cyclictest	3475417	-21	apt-get	08:05:13	2
3418020	99	21	17,3	cyclictest	3433334	-21	kworker/u8:0+events_unbound	07:25:23	2
3418018	99	21	16,3	cyclictest	335557	-21	systemd-journal	11:15:03	1
3418014	99	21	17,3	cyclictest	3536767	-21	kworker/u8:0+events_unbound	09:12:20	0
3418024	99	20	16,3	cyclictest	3537315	-21	/usr/sbin/munin	09:05:13	3
3418024	99	20	13,5	cyclictest	3589588	-21	latency_hist	09:55:01	3
3418020	99	20	17,2	cyclictest	0	-21	swapper/2	08:00:01	2
3418020	99	20	16,3	cyclictest	3736052	-21	kworker/u8:3+flush-259:0	12:25:26	2
3418020	99	20	16,3	cyclictest	3589820	-21	kworker/u8:0+flush-259:0	10:15:21	2
3418020	99	20	15,3	cyclictest	509	-21	rs:main		2
3418018	99	20	16,3	cyclictest	3657550	-21	kworker/u8:0+flush-259:0	11:55:00	1
3418018	99	20	15,4	cyclictest	3642085	-21	kworker/u8:1+flush-259:0	10:50:25	1
3418018	99	20	15,3	cyclictest	335557	-21	systemd-journal	09:20:01	1
3418018	99	20	14,4	cyclictest	335557	-21	systemd-journal	10:19:59	1
3418014	99	20	17,2	cyclictest	3516466	-21	kworker/u8:2+events_unbound	08:45:25	0
3418014	99	20	17,2	cyclictest	3506355	-21	kworker/u8:1+events_unbound	08:55:24	0
3418014	99	20	16,3	cyclictest	3657550	-21	kworker/u8:0+events_unbound	11:51:18	0
3418014	99	20	16,3	cyclictest	3652022	-21	kworker/u8:3+flush-259:0	11:20:06	0
3418014	99	20	16,3	cyclictest	3427550	-21	kworker/u8:3+events_unbound	07:44:59	0
3418024	99	19	14,3	cyclictest	3511564	-21	apt-get	08:40:12	3
3418024	99	19	13,4	cyclictest	3761701	-21	latency_hist	12:40:01	3
3418024	99	19	0,18	cyclictest	1	-21	systemd	11:47:18	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34