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 Wed Jul 29, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3900646	99	57	50,4	cyclictest	4076773	-21	cp	10:00:00	2
3900648	99	55	51,2	cyclictest	4113338	-21	latency_hist	10:35:00	3
3900638	99	54	50,3	cyclictest	4045924	-21	apt-get	09:30:13	0
3900641	99	45	37,5	cyclictest	4134079	-21	latency_hist	10:55:01	1
3900638	99	44	41,2	cyclictest	4076709	-21	kworker/u8:2+flush-259:0	10:10:01	0
3900648	99	40	37,2	cyclictest	4087641	-21	kworker/u8:4+events_unbound	11:35:00	3
3900646	99	40	37,2	cyclictest	4029602	-21	kworker/u8:0+events_unbound	09:50:00	2
3900648	99	39	33,4	cyclictest	3957818	-21	latency_hist	08:05:00	3
3900638	99	39	35,3	cyclictest	4164724	-21	kworker/u8:2+flush-259:0	11:30:12	0
3900641	99	37	32,3	cyclictest	335557	-21	systemd-journal	12:39:10	1
3900638	99	37	32,4	cyclictest	3900813	-21	kworker/u8:1+events_unbound	07:45:00	0
3900638	99	37	32,4	cyclictest	3900813	-21	kworker/u8:1+events_unbound	07:45:00	0
3900648	99	36	33,2	cyclictest	4076709	-21	kworker/u8:2+flush-259:0	10:55:21	3
3900641	99	36	31,3	cyclictest	4087649	-21	/usr/sbin/munin	10:10:15	1
3900648	99	35	31,3	cyclictest	4029602	-21	kworker/u8:0+events_unbound	09:44:13	3
3900638	99	35	31,3	cyclictest	4061165	-21	kworker/u8:1+events_unbound	09:50:02	0
3900648	99	34	28,4	cyclictest	4165044	-21	latency_hist	11:25:02	3
3900641	99	34	27,5	cyclictest	335557	-21	systemd-journal	12:24:08	1
3900638	99	34	30,3	cyclictest	1840417	-21	kworker/u8:0+events_unbound	07:35:12	0
3900648	99	33	30,2	cyclictest	3993997	-21	kworker/u8:0+events_unbound	08:41:12	3
3900638	99	33	29,3	cyclictest	4076709	-21	kworker/u8:2+events_unbound	10:55:13	0
3900648	99	32	29,2	cyclictest	4009405	-21	kworker/u8:3+events_unbound	09:05:00	3
3900648	99	32	29,2	cyclictest	3885365	-21	kworker/u8:2+flush-259:0	07:20:00	3
3900648	99	32	25,5	cyclictest	3921205	-21	latency_hist	07:30:00	3
3900638	99	32	28,3	cyclictest	3952705	-21	kworker/u8:3+events_unbound	08:15:13	0
3900648	99	31	27,3	cyclictest	3931378	-21	kworker/u8:2+events_unbound	07:49:13	3
3900648	99	31	25,4	cyclictest	44363	-21	latency_hist	12:35:00	3
3900646	99	31	27,3	cyclictest	4087641	-21	kworker/u8:4+events_unbound	10:15:12	2
3900646	99	31	25,4	cyclictest	49550	-21	latency_hist	12:40:01	2
3900641	99	31	26,3	cyclictest	3906004	-21	apt-get	07:15:13	1
3900641	99	31	23,5	cyclictest	4035299	-21	latency_hist	09:20:00	1
3900648	99	30	27,2	cyclictest	4076709	-21	kworker/u8:2+events_unbound	10:42:11	3
3900648	99	30	27,2	cyclictest	4019786	-21	kworker/u8:2+events_unbound	09:05:16	3
3900648	99	30	27,2	cyclictest	3952705	-21	kworker/u8:3+events_unbound	08:10:00	3
3900648	99	30	24,4	cyclictest	3947241	-21	base64	07:55:00	3
3900638	99	30	23,5	cyclictest	33619	-21	latency_hist	12:25:01	0
3900648	99	29	26,3	cyclictest	12074	-21	kworker/u8:2+flush-259:0	12:05:24	3
3900648	99	29	26,2	cyclictest	4019786	-21	kworker/u8:2+flush-259:0	09:30:15	3
3900641	99	29	24,4	cyclictest	3911115	-21	apt-get	07:20:12	1
3900638	99	29	26,2	cyclictest	3983883	-21	kworker/u8:2+events_unbound	08:35:02	0
3900638	99	29	25,3	cyclictest	3983883	-21	kworker/u8:2+events_unbound	08:51:12	0
3900648	99	28	24,3	cyclictest	3911076	-21	kworker/u8:4+events_unbound	07:23:10	3
3900646	99	28	24,3	cyclictest	4113578	-21	/usr/sbin/munin	10:35:15	2
3900648	99	27	24,2	cyclictest	4019786	-21	kworker/u8:2+flush-259:0	09:10:21	3
3900648	99	27	20,5	cyclictest	39007	-21	gpgv	12:30:01	3
3900638	99	27	23,3	cyclictest	4134315	-21	kworker/u8:0+events_unbound	11:23:58	0
3900638	99	27	23,3	cyclictest	4076709	-21	kworker/u8:2+events_unbound	10:25:12	0
3900638	99	27	22,3	cyclictest	3994221	-21	/usr/sbin/munin	08:40:24	0
3900648	99	26	23,2	cyclictest	4108165	-21	kworker/u8:1+flush-259:0	10:45:20	3
3900648	99	26	21,4	cyclictest	28176	-21	kworker/u8:2+events_unbound	12:35:17	3
3900648	99	26	19,4	cyclictest	3973322	-21	latency_hist	08:20:01	3
3900646	99	26	22,3	cyclictest	3900813	-21	kworker/u8:1+events_unbound	09:05:03	2
3900638	99	26	23,2	cyclictest	4066547	-21	kworker/u8:3+flush-259:0	10:00:16	0
3900638	99	26	23,2	cyclictest	4066547	-21	kworker/u8:3+flush-259:0	10:00:16	0
3900638	99	26	22,3	cyclictest	4108165	-21	kworker/u8:1+events_unbound	10:46:13	0
3900638	99	26	21,4	cyclictest	335557	-21	systemd-journal	08:10:01	0
3900648	99	25	21,3	cyclictest	3952705	-21	kworker/u8:3+events_unbound	08:23:27	3
3900648	99	25	21,3	cyclictest	3165	-21	kworker/u8:1+events_unbound	12:19:13	3
3900648	99	25	21,3	cyclictest	3165	-21	kworker/u8:1+events_unbound	12:19:13	3
3900648	99	25	20,3	cyclictest	4019786	-21	kworker/u8:2+events_unbound	09:35:20	3
3900648	99	25	19,5	cyclictest	4029602	-21	kworker/u8:0+flush-259:0	09:20:18	3
3900648	99	25	18,5	cyclictest	335557	-21	systemd-journal	08:38:29	3
3900648	99	25	18,5	cyclictest	23271	-21	latency_hist	12:15:00	3
3900646	99	25	21,3	cyclictest	3885365	-21	kworker/u8:2+events_unbound	07:15:00	2
3900646	99	25	18,5	cyclictest	4186174	-21	latency_hist	11:45:00	2
3900638	99	25	22,2	cyclictest	4181208	-21	kworker/u8:0+flush-259:0	11:45:17	0
3900638	99	25	21,3	cyclictest	4087641	-21	kworker/u8:4+events_unbound	10:18:11	0
3900638	99	25	21,3	cyclictest	3900813	-21	kworker/u8:1+events_unbound	07:34:12	0
3900648	99	24	20,3	cyclictest	4082486	-21	kworker/u8:1+flush-259:0	10:10:21	3
3900648	99	24	18,4	cyclictest	4191312	-21	latency_hist	11:50:01	3
3900641	99	24	20,3	cyclictest	4176069	-21	apt-get	11:35:12	1
3900641	99	24	20,3	cyclictest	4087641	-21	kworker/u8:4+flush-259:0	10:17:10	1
3900638	99	24	21,2	cyclictest	4009405	-21	kworker/u8:3+events_unbound	09:00:19	0
3900638	99	24	21,2	cyclictest	3900813	-21	kworker/u8:1+events_unbound	07:48:12	0
3900638	99	24	20,3	cyclictest	4019786	-21	kworker/u8:2+flush-259:0	09:20:16	0
3900638	99	24	20,3	cyclictest	3931378	-21	kworker/u8:2+events_unbound	07:53:12	0
3900648	99	23	19,3	cyclictest	4098018	-21	kworker/u8:0+events_unbound	10:23:11	3
3900646	99	23	19,3	cyclictest	3947783	-21	apt-get	07:55:13	2
3900646	99	23	19,2	cyclictest	4108165	-21	kworker/u8:1+flush-259:0	10:45:15	2
3900641	99	23	19,3	cyclictest	4014854	-21	apt-get	09:00:12	1
3900638	99	23	20,2	cyclictest	3958045	-21	kworker/u8:2+events_unbound	08:10:12	0
3900638	99	23	20,2	cyclictest	3900813	-21	kworker/u8:1+events_unbound	08:55:12	0
3900638	99	23	19,3	cyclictest	4175818	-21	kworker/u8:1+events_unbound	11:35:12	0
3900638	99	23	19,3	cyclictest	1840417	-21	kworker/u8:0+flush-259:0	07:30:00	0
3900648	99	22	19,2	cyclictest	4029602	-21	kworker/u8:0+events_unbound	09:25:20	3
3900648	99	22	18,3	cyclictest	509	-21	rs:main		3
3900648	99	22	18,3	cyclictest	3983883	-21	kworker/u8:2+flush-259:0	08:48:31	3
3900648	99	22	18,3	cyclictest	3900813	-21	kworker/u8:1+flush-259:0	08:55:24	3
3900641	99	22	19,2	cyclictest	3900813	-21	kworker/u8:1+events_unbound	09:10:02	1
3900641	99	22	18,3	cyclictest	3983922	-21	apt-get	08:30:12	1
3900638	99	22	19,2	cyclictest	4108165	-21	kworker/u8:1+flush-259:0	10:40:23	0
3900648	99	21	19,1	cyclictest	3900813	-21	kworker/u8:1+flush-259:0	08:30:25	3
3900648	99	21	17,3	cyclictest	4134315	-21	kworker/u8:0+events_unbound	11:29:13	3
3900648	99	21	15,4	cyclictest	2842	-21	/usr/sbin/munin	11:55:15	3
3900646	99	21	18,2	cyclictest	4087641	-21	kworker/u8:4+flush-259:0	10:45:00	2
3900646	99	21	17,3	cyclictest	4077361	-21	apt-get	10:00:13	2
3900646	99	21	17,3	cyclictest	4077361	-21	apt-get	10:00:12	2
3900646	99	21	17,2	cyclictest	4102987	-21	sh	10:25:00	2
3900646	99	21	16,4	cyclictest	4087414	-21	latency_hist	10:10:00	2
3900646	99	21	0,19	cyclictest	3963000	-21	cron	08:10:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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