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
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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 Apr 28, 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
3007153	99	47	44,2	cyclictest	3323176	-21	kworker/u8:2+events_unbound	12:25:00	3
3007153	99	46	43,2	cyclictest	3007118	-21	kworker/u8:1+events_unbound	07:30:22	3
3007145	99	43	40,2	cyclictest	3162760	-21	kworker/u8:2+flush-259:0	09:49:59	1
3007145	99	42	36,4	cyclictest	3126609	-21	latency_hist	09:05:02	1
3007153	99	39	36,2	cyclictest	3240975	-21	kworker/u8:2+flush-259:0	10:55:25	3
3007148	99	39	34,4	cyclictest	3282147	-21	apt-get	11:35:14	2
3007148	99	39	34,4	cyclictest	3100490	-21	kworker/u8:1+flush-259:0	08:50:19	2
3007141	99	39	34,4	cyclictest	3100027	-21	ntpq	08:35:22	0
3007141	99	39	33,4	cyclictest	252	-21	systemd-journal	07:12:47	0
3007153	99	38	35,2	cyclictest	3168593	-21	kworker/u8:3+flush-259:0	09:45:22	3
3007153	99	37	34,2	cyclictest	3225321	-21	kworker/u8:1+flush-259:0	11:10:00	3
3007153	99	37	33,3	cyclictest	3100490	-21	kworker/u8:1+flush-259:0	09:00:24	3
3007145	99	37	33,3	cyclictest	3334291	-21	kworker/u8:3+flush-259:0	12:30:00	1
3007153	99	36	33,2	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	11:50:21	3
3007148	99	36	31,3	cyclictest	252	-21	systemd-journal	11:50:00	2
3007145	99	36	32,3	cyclictest	3225539	-21	apt-get	10:40:11	1
3007145	99	36	32,3	cyclictest	252	-21	systemd-journal	10:36:48	1
3007145	99	35	31,3	cyclictest	3162760	-21	kworker/u8:2+flush-259:0	10:20:22	1
3007141	99	35	29,4	cyclictest	3047602	-21	ntpq	07:45:22	0
3007148	99	34	27,4	cyclictest	252	-21	systemd-journal	08:57:47	2
3007145	99	34	27,5	cyclictest	3204674	-21	latency_hist	10:20:00	1
3007141	99	34	31,2	cyclictest	3162760	-21	kworker/u8:2+flush-259:0	10:05:23	0
3007153	99	33	27,4	cyclictest	3307620	-21	ntpq	11:55:21	3
3007141	99	33	29,3	cyclictest	3100490	-21	kworker/u8:1+flush-259:0	08:50:23	0
3007153	99	32	30,2	cyclictest	3100490	-21	kworker/u8:1+events_unbound	09:05:26	3
3007153	99	32	29,2	cyclictest	3058744	-21	kworker/u8:3+flush-259:0	08:35:24	3
3007148	99	32	28,3	cyclictest	252	-21	systemd-journal	10:26:47	2
3007145	99	32	28,3	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	10:30:01	1
3007145	99	32	27,4	cyclictest	3142319	-21	kworker/u8:3+flush-259:0	09:20:24	1
3007153	99	31	28,2	cyclictest	3100490	-21	kworker/u8:1+events_unbound	09:15:21	3
3007153	99	31	27,3	cyclictest	3058744	-21	kworker/u8:3+events_unbound	08:30:01	3
3007153	99	31	26,4	cyclictest	3106034	-21	latency_hist	08:45:01	3
3007148	99	31	27,2	cyclictest	3292298	-21	gpgv	11:45:01	2
3007145	99	31	26,3	cyclictest	3090122	-21	kworker/u8:2+events_unbound	08:55:14	1
3007141	99	31	27,3	cyclictest	3303948	-21	kworker/u8:1+flush-259:0	12:00:27	0
3007141	99	31	26,4	cyclictest	3348816	-21	ntpq	12:35:21	0
3007141	99	31	24,5	cyclictest	3260449	-21	ntpq	11:10:21	0
3007153	99	30	27,2	cyclictest	3323176	-21	kworker/u8:2+events_unbound	12:25:18	3
3007153	99	30	27,2	cyclictest	3168593	-21	kworker/u8:3+events_unbound	10:45:01	3
3007153	99	30	27,2	cyclictest	2964107	-21	kworker/u8:0+events_unbound	08:30:12	3
3007148	99	30	24,4	cyclictest	252	-21	systemd-journal	09:20:01	2
3007141	99	30	23,5	cyclictest	3094407	-21	ntpq	08:30:20	0
3007141	99	30	22,5	cyclictest	3177946	-21	ntpq	09:50:20	0
3007153	99	29	27,2	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	12:30:18	3
3007153	99	29	25,3	cyclictest	3168593	-21	kworker/u8:3+events_unbound	10:10:16	3
3007153	99	29	24,3	cyclictest	3292841	-21	/usr/sbin/munin	11:45:18	3
3007148	99	29	25,3	cyclictest	3199805	-21	apt-get	10:15:10	2
3007148	99	29	22,5	cyclictest	3021820	-21	ntpq	07:20:22	2
3007145	99	29	25,3	cyclictest	3303948	-21	kworker/u8:1+flush-259:0	12:15:11	1
3007141	99	29	26,2	cyclictest	3100490	-21	kworker/u8:1+flush-259:0	09:25:16	0
3007141	99	29	25,3	cyclictest	3168593	-21	kworker/u8:3+flush-259:0	09:45:15	0
3007141	99	29	25,3	cyclictest	3168593	-21	kworker/u8:3+events_unbound	10:10:14	0
3007141	99	29	25,3	cyclictest	2964107	-21	kworker/u8:0+events_unbound	09:10:01	0
3007153	99	28	25,2	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	12:15:00	3
3007153	99	28	25,2	cyclictest	3090122	-21	kworker/u8:2+events_unbound	08:55:22	3
3007153	99	28	23,4	cyclictest	3043267	-21	latency_hist	07:45:00	3
3007153	99	28	23,4	cyclictest	3027479	-21	apt-get	07:26:20	3
3007148	99	28	25,2	cyclictest	3058744	-21	kworker/u8:3+flush-259:0	08:20:18	2
3007148	99	28	23,4	cyclictest	3266731	-21	apt-get	11:20:13	2
3007145	99	28	22,4	cyclictest	3085202	-21	apt-get	08:25:12	1
3007153	99	27	25,2	cyclictest	3225321	-21	kworker/u8:1+events_unbound	11:00:18	3
3007153	99	27	24,2	cyclictest	3022684	-21	kworker/u8:3+flush-259:0	07:45:18	3
3007145	99	27	23,3	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	11:30:16	1
3007145	99	27	22,4	cyclictest	3064600	-21	apt-get	08:05:12	1
3007145	99	27	21,5	cyclictest	3275843	-21	ntpq	11:25:19	1
3007153	99	26	23,2	cyclictest	3214986	-21	kworker/u8:0+events_unbound	12:05:19	3
3007153	99	26	23,2	cyclictest	3058744	-21	kworker/u8:3+flush-259:0	08:20:01	3
3007153	99	26	23,2	cyclictest	3058744	-21	kworker/u8:3+flush-259:0	08:20:00	3
3007153	99	26	23,2	cyclictest	3053368	-21	kworker/u8:2+flush-259:0	07:55:13	3
3007153	99	26	23,2	cyclictest	2964107	-21	kworker/u8:0+flush-259:0	09:10:22	3
3007153	99	26	21,3	cyclictest	509	-21	rs:main		3
3007148	99	26	22,3	cyclictest	2964107	-21	kworker/u8:0+events_unbound	08:15:24	2
3007148	99	26	22,3	cyclictest	2964107	-21	kworker/u8:0+events_unbound	08:15:23	2
3007148	99	26	21,4	cyclictest	2964107	-21	kworker/u8:0+flush-259:0	08:00:21	2
3007145	99	26	22,3	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	11:50:17	1
3007145	99	26	22,3	cyclictest	3022684	-21	kworker/u8:3+flush-259:0	07:26:20	1
3007141	99	26	23,2	cyclictest	3303948	-21	kworker/u8:1+events_unbound	12:14:35	0
3007141	99	26	23,2	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	11:45:11	0
3007141	99	26	22,3	cyclictest	3147646	-21	kworker/u8:0+events_unbound	09:40:20	0
3007148	99	25	22,2	cyclictest	3168593	-21	kworker/u8:3+events_unbound	10:45:24	2
3007145	99	25	21,3	cyclictest	3100490	-21	kworker/u8:1+events_unbound	09:25:22	1
3007145	99	25	19,4	cyclictest	3157042	-21	ntpq	09:30:23	1
3007145	99	25	19,4	cyclictest	3069760	-21	apt-get	08:10:11	1
3007145	99	25	18,5	cyclictest	3017489	-21	latency_hist	07:20:01	1
3007141	99	25	22,2	cyclictest	3225321	-21	kworker/u8:1+flush-259:0	10:55:20	0
3007141	99	25	22,2	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	10:30:13	0
3007141	99	25	22,2	cyclictest	3214986	-21	kworker/u8:0+events_unbound	11:50:21	0
3007141	99	25	21,3	cyclictest	3323176	-21	kworker/u8:2+events_unbound	12:21:48	0
3007141	99	25	21,3	cyclictest	3179136	-21	apt-get	09:55:11	0
3007141	99	25	21,3	cyclictest	3090122	-21	kworker/u8:2+flush-259:0	08:55:25	0
3007141	99	25	20,4	cyclictest	3142319	-21	kworker/u8:3+events_unbound	09:35:13	0
3007153	99	24	21,2	cyclictest	2964107	-21	kworker/u8:0+flush-259:0	07:10:22	3
3007153	99	24	20,3	cyclictest	3162760	-21	kworker/u8:2+events_unbound	09:55:12	3
3007148	99	24	20,3	cyclictest	2964107	-21	kworker/u8:0+flush-259:0	07:10:28	2
3007148	99	24	19,3	cyclictest	509	-21	rs:main		2
3007145	99	24	20,3	cyclictest	3214986	-21	kworker/u8:0+flush-259:0	11:55:16	1
3007145	99	24	18,4	cyclictest	3319094	-21	/usr/sbin/munin	12:10:13	1
3007141	99	24	21,2	cyclictest	3281903	-21	kworker/u8:3+flush-259:0	11:40:01	0
3007141	99	24	21,2	cyclictest	3022684	-21	kworker/u8:3+flush-259:0	07:40:20	0
3007141	99	24	20,3	cyclictest	3162760	-21	kworker/u8:2+flush-259:0	10:00:14	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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