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 May 19, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3517405	99	40	31,6	cyclictest	335557	-21	systemd-journal	21:35:00	2
3517398	99	40	35,3	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	00:25:00	0
3517405	99	39	36,2	cyclictest	3682965	-21	fwupd	21:45:57	2
3517405	99	38	33,4	cyclictest	3522488	-21	latency_hist	19:15:00	2
3517405	99	36	30,4	cyclictest	3538049	-21	latency_hist	19:30:00	2
3517403	99	36	33,2	cyclictest	3522721	-21	kworker/u8:3+flush-259:0	19:40:24	1
3517398	99	36	31,3	cyclictest	3699955	-21	kworker/u8:3+flush-259:0	22:30:00	0
3517408	99	35	31,3	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	00:30:20	3
3517398	99	35	29,4	cyclictest	3610170	-21	ntpq	20:35:23	0
3517408	99	33	30,2	cyclictest	3798369	-21	kworker/u8:3+events_unbound	00:15:22	3
3517408	99	33	30,2	cyclictest	3782836	-21	kworker/u8:4+events_unbound	23:40:22	3
3517408	99	33	27,4	cyclictest	3850303	-21	latency_hist	00:30:00	3
3517405	99	33	26,5	cyclictest	3580057	-21	latency_hist	20:10:00	2
3517398	99	33	27,4	cyclictest	3736052	-21	latency_hist	22:40:01	0
3517408	99	32	29,2	cyclictest	3458736	-21	kworker/u8:2+events_unbound	19:10:17	3
3517405	99	32	26,3	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	00:10:17	2
3517403	99	32	29,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	00:30:14	1
3517403	99	32	27,3	cyclictest	3559707	-21	kworker/u8:4+events_unbound	19:55:25	1
3517403	99	32	25,5	cyclictest	3844323	-21	ntpq	00:20:22	1
3517403	99	31	28,2	cyclictest	896866	-21	kworker/u8:5+events_unbound	19:15:20	1
3517403	99	31	28,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	23:00:01	1
3517408	99	30	27,2	cyclictest	3621292	-21	kworker/u8:0+events_unbound	20:50:16	3
3517405	99	30	26,3	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	00:30:16	2
3517403	99	30	28,1	cyclictest	3762170	-21	kworker/u8:2+events_unbound	23:05:18	1
3517408	99	29	26,2	cyclictest	3688951	-21	kworker/u8:1+flush-259:0	22:15:24	3
3517408	99	29	26,2	cyclictest	3580284	-21	kworker/u8:3+events_unbound	20:40:22	3
3517405	99	29	22,5	cyclictest	3715268	-21	latency_hist	22:20:01	2
3517403	99	29	26,2	cyclictest	3782836	-21	kworker/u8:4+events_unbound	23:40:20	1
3517408	99	28	25,2	cyclictest	3850329	-21	kworker/u8:2+events_unbound	00:35:19	3
3517405	99	28	22,4	cyclictest	3814549	-21	diskstats	23:55:10	2
3517403	99	28	25,2	cyclictest	3720725	-21	kworker/u8:2+flush-259:0	22:40:21	1
3517403	99	28	25,2	cyclictest	3720725	-21	kworker/u8:2+flush-259:0	22:35:21	1
3517403	99	28	25,2	cyclictest	3590423	-21	kworker/u8:1+events_unbound	20:35:16	1
3517408	99	27	24,2	cyclictest	3512454	-21	kworker/u8:0+events_unbound	20:10:21	3
3517405	99	27	22,3	cyclictest	3699955	-21	kworker/u8:3+flush-259:0	22:50:15	2
3517405	99	27	21,4	cyclictest	3839975	-21	latency_hist	00:20:00	2
3517403	99	27	24,2	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	00:10:25	1
3517403	99	27	24,2	cyclictest	3631628	-21	kworker/u8:3+flush-259:0	21:45:56	1
3517403	99	27	24,2	cyclictest	3590423	-21	kworker/u8:1+events_unbound	20:25:13	1
3517408	99	26	24,1	cyclictest	3652475	-21	kworker/u8:4+flush-259:0	21:20:19	3
3517408	99	26	23,2	cyclictest	3736285	-21	kworker/u8:1+flush-259:0	22:55:26	3
3517408	99	26	23,2	cyclictest	3590423	-21	kworker/u8:1+events_unbound	20:30:24	3
3517408	99	26	21,4	cyclictest	335557	-21	systemd-journal	19:29:59	3
3517405	99	26	21,3	cyclictest	3652475	-21	kworker/u8:4+flush-259:0	21:25:15	2
3517403	99	26	23,2	cyclictest	3688951	-21	kworker/u8:1+events_unbound	22:10:21	1
3517403	99	26	23,2	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	23:10:25	1
3517403	99	26	22,3	cyclictest	3626715	-21	apt-get	20:55:11	1
3517408	99	25	23,1	cyclictest	3590423	-21	kworker/u8:1+flush-259:0	21:10:24	3
3517408	99	25	22,2	cyclictest	3798369	-21	kworker/u8:3+events_unbound	00:20:18	3
3517405	99	25	21,3	cyclictest	3855770	-21	apt-get	00:35:12	2
3517405	99	25	21,3	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	23:50:18	2
3517403	99	25	22,2	cyclictest	3798369	-21	kworker/u8:3+flush-259:0	00:00:15	1
3517403	99	25	22,2	cyclictest	3533117	-21	kworker/u8:2+flush-259:0	19:35:00	1
3517403	99	25	22,2	cyclictest	3512454	-21	kworker/u8:0+flush-259:0	19:45:16	1
3517403	99	25	21,3	cyclictest	3667776	-21	kworker/u8:5+events_unbound	21:50:12	1
3517408	99	24	21,2	cyclictest	3720725	-21	kworker/u8:2+events_unbound	22:35:23	3
3517408	99	24	21,2	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	00:10:24	3
3517408	99	24	21,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	00:07:38	3
3517405	99	24	21,2	cyclictest	3720725	-21	kworker/u8:2+events_unbound	22:25:18	2
3517403	99	24	21,2	cyclictest	3590423	-21	kworker/u8:1+events_unbound	21:40:17	1
3517403	99	24	20,3	cyclictest	3699955	-21	kworker/u8:3+events_unbound	22:51:57	1
3517403	99	24	20,3	cyclictest	3605872	-21	kworker/u8:2+events_unbound	21:00:19	1
3517403	99	24	20,3	cyclictest	3512454	-21	kworker/u8:0+events_unbound	19:22:57	1
3517398	99	24	20,3	cyclictest	3673202	-21	apt-get	21:40:09	0
3517398	99	24	18,4	cyclictest	3689588	-21	munin-node	21:55:11	0
3517408	99	23	18,4	cyclictest	335557	-21	systemd-journal	21:09:59	3
3517408	99	23	18,3	cyclictest	3756980	-21	/usr/sbin/munin	23:00:15	3
3517405	99	23	19,3	cyclictest	3782836	-21	kworker/u8:4+events_unbound	23:45:00	2
3517403	99	23	20,2	cyclictest	3736285	-21	kworker/u8:1+events_unbound	22:45:22	1
3517403	99	23	20,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	22:31:47	1
3517403	99	23	20,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	21:55:18	1
3517398	99	23	20,2	cyclictest	3631628	-21	kworker/u8:3+flush-259:0	21:40:00	0
3517408	99	22	20,1	cyclictest	3772247	-21	idleruntime-cro	23:15:01	3
3517408	99	22	19,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	22:05:19	3
3517408	99	22	19,2	cyclictest	3590423	-21	kworker/u8:1+flush-259:0	21:35:20	3
3517408	99	22	19,2	cyclictest	3512454	-21	kworker/u8:0+events_unbound	20:27:00	3
3517408	99	22	17,3	cyclictest	3673176	-21	/usr/sbin/munin	21:40:21	3
3517405	99	22	16,4	cyclictest	3772256	-21	latency_hist	23:15:01	2
3517403	99	22	19,2	cyclictest	3621292	-21	kworker/u8:0+flush-259:0	21:15:25	1
3517403	99	22	19,2	cyclictest	3580284	-21	kworker/u8:3+events_unbound	20:20:01	1
3517403	99	22	19,2	cyclictest	3512454	-21	kworker/u8:0+events_unbound	20:10:14	1
3517403	99	22	18,3	cyclictest	3667776	-21	kworker/u8:5+flush-259:0	22:00:15	1
3517403	99	22	17,3	cyclictest	3548325	-21	apt-get	19:39:59	1
3517398	99	22	15,5	cyclictest	3787791	-21	latency_hist	23:30:00	0
3517398	99	22	15,5	cyclictest	3682434	-21	ntpq	21:45:24	0
3517408	99	21	18,2	cyclictest	3580284	-21	kworker/u8:3+events_unbound	20:45:15	3
3517408	99	21	18,2	cyclictest	3559707	-21	kworker/u8:4+flush-259:0	19:55:20	3
3517408	99	21	16,3	cyclictest	3527664	-21	cron	19:20:00	3
3517405	99	21	15,4	cyclictest	3704902	-21	latency_hist	22:10:01	2
3517405	99	21	15,4	cyclictest	3543183	-21	latency_hist	19:35:01	2
3517403	99	21	18,3	cyclictest	3590423	-21	kworker/u8:1+events_unbound	21:12:58	1
3517403	99	21	18,2	cyclictest	3829726	-21	kworker/u8:1+events_unbound	00:25:15	1
3517403	99	21	18,2	cyclictest	3590423	-21	kworker/u8:1+flush-259:0	21:30:20	1
3517403	99	21	18,2	cyclictest	3512454	-21	kworker/u8:0+events_unbound	19:13:56	1
3517403	99	21	17,3	cyclictest	3678378	-21	kworker/u8:0+flush-259:0	23:55:10	1
3517398	99	21	18,2	cyclictest	3605872	-21	kworker/u8:2+flush-259:0	21:00:01	0
3517398	99	21	15,4	cyclictest	335557	-21	systemd-journal	21:22:56	0
3517408	99	20	18,2	cyclictest	3590423	-21	kworker/u8:1+events_unbound	20:35:22	3
3517408	99	20	17,2	cyclictest	3736285	-21	kworker/u8:1+events_unbound	22:45:24	3
3517408	99	20	17,2	cyclictest	3678378	-21	kworker/u8:0+events_unbound	23:06:58	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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