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 50 highest latencies:

System rackeslot4s.osadl.org (updated Mon Jun 22, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3477062	99	52	49,2	cyclictest	3565468	-21	kworker/u8:0+events_unbound	20:39:35	2
3477062	99	52	49,2	cyclictest	3513514	-21	kworker/u8:2+flush-259:0	20:25:25	2
3477066	99	49	46,2	cyclictest	3674721	-21	kworker/u8:1+flush-259:0	22:20:23	3
3477060	99	49	46,2	cyclictest	3690622	-21	kworker/u8:4+flush-259:0	23:00:00	0
3477062	99	48	45,2	cyclictest	3466784	-21	kworker/u8:4+flush-259:0	19:35:25	2
3477066	99	47	43,3	cyclictest	3622584	-21	gpgv	21:30:00	3
3477062	99	47	43,3	cyclictest	1198305	-21	kworker/u8:1+events_unbound	19:26:25	2
3477066	99	46	43,2	cyclictest	3664476	-21	kworker/u8:3+events_unbound	22:40:22	3
3477066	99	46	43,2	cyclictest	3596320	-21	kworker/u8:0+events_unbound	21:15:15	3
3477062	99	46	43,2	cyclictest	3596320	-21	kworker/u8:0+flush-259:0	21:05:16	2
3477061	99	46	40,4	cyclictest	3508621	-21	latency_hist	19:40:01	1
3477060	99	46	42,3	cyclictest	3727171	-21	kworker/u8:3+events_unbound	23:20:18	0
3477066	99	45	42,2	cyclictest	3793948	-21	kworker/u8:4+events_unbound	00:35:21	3
3477066	99	45	42,2	cyclictest	1198305	-21	kworker/u8:1+flush-259:0	19:45:26	3
3477062	99	45	42,2	cyclictest	3513514	-21	kworker/u8:2+events_unbound	20:10:00	2
3477061	99	45	41,3	cyclictest	3758048	-21	kworker/u8:4+events_unbound	00:00:24	1
3477061	99	45	39,4	cyclictest	335557	-21	systemd-journal	22:17:24	1
3477066	99	44	41,2	cyclictest	3575769	-21	kworker/u8:1+flush-259:0	21:05:25	3
3477062	99	44	41,2	cyclictest	3716640	-21	kworker/u8:1+events_unbound	23:25:14	2
3477061	99	44	41,2	cyclictest	3768303	-21	kworker/u8:2+flush-259:0	00:05:25	1
3477061	99	44	41,2	cyclictest	3752943	-21	/usr/sbin/munin	23:35:24	1
3477060	99	44	41,2	cyclictest	3690622	-21	kworker/u8:4+events_unbound	22:45:22	0
3477066	99	43	39,3	cyclictest	3488099	-21	/usr/sbin/munin	19:20:15	3
3477066	99	43	38,3	cyclictest	3716625	-21	latency_hist	23:00:01	3
3477062	99	43	40,2	cyclictest	3690622	-21	kworker/u8:4+events_unbound	22:55:15	2
3477062	99	43	39,3	cyclictest	3727171	-21	kworker/u8:3+events_unbound	23:15:12	2
3477062	99	43	37,4	cyclictest	3820699	-21	latency_hist	00:40:00	2
3477061	99	43	39,3	cyclictest	3768303	-21	kworker/u8:2+flush-259:0	00:30:16	1
3477060	99	43	39,3	cyclictest	3612464	-21	kworker/u8:2+flush-259:0	21:45:21	0
3477060	99	43	39,3	cyclictest	3612464	-21	kworker/u8:2+events_unbound	21:50:23	0
3477060	99	43	37,5	cyclictest	3649050	-21	apt-get	21:55:11	0
3477062	99	42	39,2	cyclictest	1198305	-21	kworker/u8:1+events_unbound	19:55:16	2
3477061	99	42	39,2	cyclictest	3612464	-21	kworker/u8:2+events_unbound	21:50:17	1
3477061	99	42	38,3	cyclictest	3555192	-21	kworker/u8:3+events_unbound	21:00:23	1
3477061	99	42	36,3	cyclictest	3466784	-21	kworker/u8:4+flush-259:0	19:40:18	1
3477060	99	42	38,3	cyclictest	3524380	-21	kworker/u8:3+flush-259:0	20:10:20	0
3477066	99	41	38,2	cyclictest	3768303	-21	kworker/u8:2+events_unbound	00:05:18	3
3477062	99	41	38,2	cyclictest	3768303	-21	kworker/u8:2+flush-259:0	00:33:13	2
3477062	99	41	38,2	cyclictest	3758048	-21	kworker/u8:4+flush-259:0	23:40:19	2
3477062	99	41	38,2	cyclictest	3680159	-21	kworker/u8:2+flush-259:0	22:25:24	2
3477062	99	41	38,2	cyclictest	3555192	-21	kworker/u8:3+flush-259:0	21:30:21	2
3477062	99	41	37,3	cyclictest	335557	-21	systemd-journal	23:31:56	2
3477061	99	41	38,2	cyclictest	3716640	-21	kworker/u8:1+events_unbound	23:30:16	1
3477061	99	41	38,2	cyclictest	3612464	-21	kworker/u8:2+flush-259:0	21:25:15	1
3477060	99	41	38,3	cyclictest	3612464	-21	kworker/u8:2+flush-259:0	22:00:24	0
3477066	99	40	37,2	cyclictest	3653712	-21	kworker/u8:0+events_unbound	22:05:25	3
3477061	99	40	36,3	cyclictest	3653712	-21	kworker/u8:0+events_unbound	22:05:00	1
3477066	99	39	36,2	cyclictest	3716640	-21	kworker/u8:1+events_unbound	23:25:21	3
3477066	99	39	36,2	cyclictest	3555192	-21	kworker/u8:3+flush-259:0	21:35:16	3
3477062	99	39	36,2	cyclictest	3768303	-21	kworker/u8:2+events_unbound	00:20:15	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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