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 Sun Jul 12, 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
3928893	99	36	32,3	cyclictest	5096	-21	kworker/u8:4+events_unbound	11:40:01	1
3928893	99	34	30,3	cyclictest	5096	-21	kworker/u8:4+events_unbound	12:13:54	1
3928893	99	32	28,3	cyclictest	4037513	-21	kworker/u8:2+events_unbound	10:03:54	1
3928893	99	31	27,3	cyclictest	4001026	-21	kworker/u8:1+events_unbound	08:23:48	1
3928893	99	30	26,3	cyclictest	3896568	-21	kworker/u8:3+events_unbound	07:18:48	1
3928893	99	29	25,3	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:55:55	1
3928893	99	29	25,2	cyclictest	4016841	-21	latency_hist	08:35:00	1
3928893	99	28	25,2	cyclictest	4001026	-21	kworker/u8:1+events_unbound	08:37:49	1
3928893	99	28	24,3	cyclictest	4016861	-21	kworker/u8:0+events_unbound	09:09:48	1
3928902	99	27	24,2	cyclictest	3896568	-21	kworker/u8:3+flush-259:0	07:15:21	3
3928902	99	27	23,3	cyclictest	4037513	-21	kworker/u8:2+flush-259:0	09:05:00	3
3928893	99	27	24,2	cyclictest	4016861	-21	kworker/u8:0+events_unbound	08:47:47	1
3928893	99	27	24,2	cyclictest	31666	-21	kworker/u8:0+events_unbound	12:05:13	1
3928893	99	27	23,3	cyclictest	5096	-21	kworker/u8:4+events_unbound	11:39:53	1
3928893	99	27	23,3	cyclictest	5096	-21	kworker/u8:4+events_unbound	11:32:54	1
3928893	99	27	23,2	cyclictest	4001026	-21	kworker/u8:1+events_unbound	08:40:19	1
3928893	99	27	20,5	cyclictest	335557	-21	systemd-journal	07:30:00	1
3928902	99	26	20,4	cyclictest	4136618	-21	latency_hist	10:30:01	3
3928897	99	26	19,5	cyclictest	4172667	-21	latency_hist	11:05:00	2
3928893	99	26	23,2	cyclictest	4172694	-21	kworker/u8:1+events_unbound	11:45:54	1
3928893	99	26	22,3	cyclictest	3944072	-21	kworker/u8:2+events_unbound	07:59:47	1
3928893	99	26	21,3	cyclictest	335557	-21	systemd-journal	11:13:53	1
3928902	99	25	21,3	cyclictest	4001026	-21	kworker/u8:1+events_unbound	08:25:00	3
3928902	99	25	21,3	cyclictest	31666	-21	kworker/u8:0+flush-259:0	12:05:16	3
3928893	99	25	23,2	cyclictest	4037513	-21	kworker/u8:2+events_unbound	09:21:49	1
3928893	99	25	22,3	cyclictest	4016861	-21	kworker/u8:0+events_unbound	09:32:49	1
3928893	99	25	22,2	cyclictest	4172694	-21	kworker/u8:1+events_unbound	11:50:20	1
3928893	99	25	22,2	cyclictest	4037513	-21	kworker/u8:2+events_unbound	10:07:53	1
3928893	99	25	22,2	cyclictest	4037513	-21	kworker/u8:2+events_unbound	09:12:49	1
3928893	99	25	20,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:25:12	1
3928902	99	24	20,3	cyclictest	4037513	-21	kworker/u8:2+events_unbound	09:25:02	3
3928897	99	24	18,4	cyclictest	3939177	-21	latency_hist	07:20:02	2
3928893	99	24	21,2	cyclictest	4074821	-21	kworker/u8:1+events_unbound	09:55:24	1
3928893	99	24	21,2	cyclictest	3949544	-21	kworker/u8:3+events_unbound	07:35:23	1
3928893	99	24	20,2	cyclictest	4016861	-21	kworker/u8:0+events_unbound	09:40:15	1
3928891	99	24	21,2	cyclictest	52040	-21	kworker/u8:1+flush-259:0	12:20:24	0
3928891	99	24	19,4	cyclictest	20328	-21	latency_hist	11:45:01	0
3928902	99	23	16,5	cyclictest	4027195	-21	latency_hist	08:45:01	3
3928893	99	23	20,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:50:16	1
3928893	99	23	20,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:35:17	1
3928893	99	23	20,2	cyclictest	3995204	-21	kworker/u8:3+events_unbound	08:10:26	1
3928893	99	23	19,3	cyclictest	4037513	-21	kworker/u8:2+events_unbound	09:25:49	1
3928893	99	23	19,2	cyclictest	3995204	-21	kworker/u8:3+events_unbound	08:15:13	1
3928902	99	22	19,2	cyclictest	4188291	-21	kworker/u8:0+events_unbound	11:30:00	3
3928902	99	22	19,2	cyclictest	4131478	-21	kworker/u8:1+flush-259:0	10:40:25	3
3928902	99	22	19,2	cyclictest	4074821	-21	kworker/u8:1+flush-259:0	09:50:17	3
3928902	99	22	19,2	cyclictest	31666	-21	kworker/u8:0+events_unbound	12:00:01	3
3928902	99	22	18,3	cyclictest	4080223	-21	/usr/sbin/munin	09:35:16	3
3928902	99	22	18,3	cyclictest	3949544	-21	kworker/u8:3+flush-259:0	07:34:59	3
3928902	99	22	18,2	cyclictest	4079970	-21	cron	09:35:01	3
3928897	99	22	16,4	cyclictest	4167505	-21	latency_hist	11:00:01	2
3928893	99	22	20,2	cyclictest	5096	-21	kworker/u8:4+events_unbound	11:58:54	1
3928893	99	22	19,2	cyclictest	52040	-21	kworker/u8:1+events_unbound	12:34:56	1
3928893	99	22	19,2	cyclictest	52040	-21	kworker/u8:1+events_unbound	12:24:33	1
3928893	99	22	19,2	cyclictest	5096	-21	kworker/u8:4+events_unbound	12:00:14	1
3928891	99	22	19,2	cyclictest	4172694	-21	kworker/u8:1+flush-259:0	11:30:26	0
3928902	99	21	17,3	cyclictest	4037513	-21	kworker/u8:2+events_unbound	09:59:53	3
3928902	99	21	17,3	cyclictest	3975693	-21	kworker/u8:1+events_unbound	07:56:47	3
3928902	99	21	17,3	cyclictest	3949544	-21	kworker/u8:3+events_unbound	07:46:47	3
3928897	99	21	18,2	cyclictest	0	-21	swapper/2	09:05:00	2
3928893	99	21	18,2	cyclictest	3949544	-21	kworker/u8:3+events_unbound	07:48:47	1
3928893	99	21	18,2	cyclictest	3918860	-21	kworker/u8:0+events_unbound	07:12:46	1
3928893	99	21	17,3	cyclictest	4167163	-21	kworker/u8:2+events_unbound	11:00:21	1
3928893	99	21	15,4	cyclictest	77778	-21	latency_hist	12:40:01	1
3928891	99	21	19,1	cyclictest	4032361	-21	basename	08:50:01	0
3928891	99	21	17,3	cyclictest	3944072	-21	kworker/u8:2+flush-259:0	08:10:01	0
3928902	99	20	16,3	cyclictest	3949544	-21	kworker/u8:3+flush-259:0	07:50:46	3
3928902	99	20	16,3	cyclictest	3944072	-21	kworker/u8:2+events_unbound	08:12:48	3
3928902	99	20	15,4	cyclictest	335557	-21	systemd-journal	10:32:54	3
3928897	99	20	17,2	cyclictest	4188068	-21	cut	11:20:01	2
3928893	99	20	18,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:41:54	1
3928893	99	20	17,2	cyclictest	3975693	-21	kworker/u8:1+events_unbound	08:05:27	1
3928893	99	20	16,3	cyclictest	4110847	-21	kworker/u8:3+events_unbound	11:22:54	1
3928893	99	20	15,3	cyclictest	3964995	-21	gpgv	07:45:01	1
3928893	99	20	14,4	cyclictest	335557	-21	systemd-journal	07:24:59	1
3928891	99	20	16,3	cyclictest	4110847	-21	kworker/u8:3+events_unbound	10:57:53	0
3928891	99	20	16,3	cyclictest	36862	-21	apt-get	12:00:12	0
3928891	99	20	15,3	cyclictest	3918860	-21	kworker/u8:0+events_unbound	07:55:00	0
3928902	99	19	16,2	cyclictest	52040	-21	kworker/u8:1+events_unbound	12:39:54	3
3928902	99	19	16,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:49:19	3
3928902	99	19	15,3	cyclictest	3949544	-21	kworker/u8:3+events_unbound	07:37:46	3
3928902	99	19	15,3	cyclictest	3918860	-21	kworker/u8:0+events_unbound	07:26:46	3
3928902	99	19	14,4	cyclictest	4006607	-21	kworker/u8:3+events_unbound	08:30:49	3
3928902	99	19	14,3	cyclictest	4115985	-21	latency_hist	10:10:00	3
3928902	99	19	13,4	cyclictest	335557	-21	systemd-journal	11:18:53	3
3928897	99	19	14,3	cyclictest	4121410	-21	/usr/sbin/munin	10:15:14	2
3928893	99	19	16,2	cyclictest	3944072	-21	kworker/u8:2+events_unbound	07:34:20	1
3928893	99	19	13,4	cyclictest	4152279	-21	/usr/sbin/munin	10:45:14	1
3928891	99	19	16,2	cyclictest	3944072	-21	kworker/u8:2+flush-259:0	08:20:17	0
3928891	99	19	15,3	cyclictest	4037513	-21	kworker/u8:2+flush-259:0	10:00:01	0
3928902	99	18	15,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:50:17	3
3928902	99	18	15,2	cyclictest	4016861	-21	kworker/u8:0+events_unbound	08:50:00	3
3928902	99	18	14,3	cyclictest	3944072	-21	kworker/u8:2+events_unbound	08:28:47	3
3928893	99	18	15,2	cyclictest	4131478	-21	kworker/u8:1+events_unbound	10:34:19	1
3928893	99	18	14,3	cyclictest	5095	-21	kworker/u8:2+events_unbound	12:29:29	1
3928893	99	18	12,4	cyclictest	507	-21	in:imuxsock	09:05:01	1
3928893	99	18	11,5	cyclictest	335557	-21	systemd-journal	10:15:00	1
3928891	99	18	13,3	cyclictest	3928876	-21	kworker/u8:1+flush-259:0	07:15:01	0
3928891	99	18	0,16	cyclictest	1	-21	systemd	12:17:53	0
3928891	99	18	0,16	cyclictest	1	-21	systemd	10:10:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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