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 Fri Jul 17, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3665514	99	55	52,2	cyclictest	3660246	-21	kworker/u8:1+flush-259:0	19:35:21	0
3665516	99	45	37,5	cyclictest	3867789	-21	latency_hist	22:25:01	1
3665516	99	40	36,3	cyclictest	3899325	-21	kworker/u8:4+flush-259:0	23:30:26	1
3665514	99	38	35,2	cyclictest	3842103	-21	kworker/u8:4+flush-259:0	22:20:21	0
3665514	99	38	34,3	cyclictest	3701704	-21	kworker/u8:2+events_unbound	19:45:23	0
3665519	99	37	33,3	cyclictest	3940977	-21	kworker/u8:0+flush-259:0	23:40:00	2
3665516	99	37	32,4	cyclictest	3660246	-21	kworker/u8:1+flush-259:0	19:39:59	1
3665514	99	37	33,3	cyclictest	3826427	-21	kworker/u8:0+events_unbound	21:50:17	0
3665516	99	36	33,2	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	23:05:00	1
3665514	99	36	31,3	cyclictest	3676005	-21	kworker/u8:4+events_unbound	19:25:20	0
3665514	99	35	32,2	cyclictest	3800570	-21	kworker/u8:1+events_unbound	23:59:30	0
3665514	99	35	32,2	cyclictest	3800570	-21	kworker/u8:1+events_unbound	22:50:23	0
3665514	99	35	32,2	cyclictest	3800570	-21	kworker/u8:1+events_unbound	00:05:25	0
3665514	99	35	32,2	cyclictest	3701704	-21	kworker/u8:2+flush-259:0	20:30:16	0
3665514	99	35	31,3	cyclictest	3872992	-21	kworker/u8:2+events_unbound	22:35:00	0
3665514	99	35	31,3	cyclictest	3872992	-21	kworker/u8:2+events_unbound	22:34:59	0
3665514	99	35	31,3	cyclictest	3743426	-21	kworker/u8:3+events_unbound	20:45:22	0
3665514	99	35	31,3	cyclictest	3676005	-21	kworker/u8:4+flush-259:0	19:20:10	0
3665519	99	34	30,3	cyclictest	3784961	-21	kworker/u8:2+flush-259:0	21:05:17	2
3665516	99	34	28,4	cyclictest	3743380	-21	latency_hist	20:25:01	1
3665524	99	33	29,3	cyclictest	3920336	-21	kworker/u8:2+flush-259:0	23:35:17	3
3665519	99	33	30,2	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	00:10:16	2
3665516	99	33	28,3	cyclictest	509	-21	rs:main		1
3665516	99	33	28,3	cyclictest	3727475	-21	gpgv	20:10:00	1
3665516	99	33	28,3	cyclictest	335557	-21	systemd-journal	21:21:30	1
3665514	99	33	30,2	cyclictest	3784961	-21	kworker/u8:2+events_unbound	21:30:40	0
3665514	99	33	29,3	cyclictest	3872992	-21	kworker/u8:2+flush-259:0	22:35:16	0
3665514	99	33	29,3	cyclictest	3601490	-21	kworker/u8:0+events_unbound	20:15:26	0
3665514	99	33	29,3	cyclictest	3601490	-21	kworker/u8:0+events_unbound	20:15:25	0
3665519	99	32	28,3	cyclictest	3899325	-21	kworker/u8:4+flush-259:0	23:20:23	2
3665519	99	32	28,3	cyclictest	3743426	-21	kworker/u8:3+flush-259:0	21:00:01	2
3665514	99	32	27,2	cyclictest	3790298	-21	kworker/u8:0+events_unbound	21:20:22	0
3665524	99	31	26,3	cyclictest	3868032	-21	/usr/sbin/munin	22:25:15	3
3665524	99	31	25,4	cyclictest	3800570	-21	kworker/u8:1+events_unbound	21:35:16	3
3665519	99	31	26,4	cyclictest	335557	-21	systemd-journal	20:33:28	2
3665514	99	31	28,2	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	23:00:26	0
3665514	99	31	28,2	cyclictest	3701704	-21	kworker/u8:2+flush-259:0	19:55:23	0
3665514	99	31	28,2	cyclictest	3660246	-21	kworker/u8:1+events_unbound	19:30:20	0
3665514	99	31	28,2	cyclictest	3601490	-21	kworker/u8:0+flush-259:0	20:20:25	0
3665514	99	31	28,2	cyclictest	3601490	-21	kworker/u8:0+events_unbound	20:25:23	0
3665514	99	31	27,3	cyclictest	3987792	-21	kworker/u8:2+events_unbound	00:34:31	0
3665514	99	31	27,3	cyclictest	3842103	-21	kworker/u8:4+flush-259:0	22:15:19	0
3665514	99	31	27,2	cyclictest	3701704	-21	kworker/u8:2+events_unbound	19:50:18	0
3665514	99	31	23,3	cyclictest	3784961	-21	kworker/u8:2+events_unbound	21:05:18	0
3665524	99	30	24,4	cyclictest	3966783	-21	cat	00:00:01	3
3665519	99	30	27,2	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	21:25:17	2
3665516	99	30	26,3	cyclictest	3998360	-21	apt-get	00:30:10	1
3665514	99	30	27,2	cyclictest	3920336	-21	kworker/u8:2+events_unbound	00:00:15	0
3665514	99	30	26,3	cyclictest	3790298	-21	kworker/u8:0+events_unbound	21:15:18	0
3665514	99	30	26,3	cyclictest	3701704	-21	kworker/u8:2+events_unbound	20:00:14	0
3665514	99	30	24,4	cyclictest	3805962	-21	apt-get	21:25:11	0
3665516	99	29	23,4	cyclictest	3780197	-21	/usr/sbin/munin	21:00:14	1
3665514	99	29	27,2	cyclictest	3800570	-21	kworker/u8:1+events_unbound	23:25:18	0
3665514	99	29	26,2	cyclictest	3800570	-21	kworker/u8:1+events_unbound	22:45:15	0
3665514	99	29	26,2	cyclictest	3676005	-21	kworker/u8:4+events_unbound	19:40:19	0
3665514	99	29	25,3	cyclictest	3967276	-21	kworker/u8:4+flush-259:0	00:15:18	0
3665514	99	29	25,3	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	23:52:51	0
3665524	99	28	24,3	cyclictest	3701704	-21	kworker/u8:2+events_unbound	20:30:19	3
3665516	99	28	23,3	cyclictest	3805936	-21	/usr/sbin/munin	21:25:20	1
3665514	99	28	25,2	cyclictest	3920336	-21	kworker/u8:2+events_unbound	23:15:17	0
3665514	99	28	25,2	cyclictest	3676005	-21	kworker/u8:4+flush-259:0	20:05:21	0
3665514	99	28	25,2	cyclictest	3644947	-21	kworker/u8:2+events_unbound	19:10:21	0
3665514	99	28	24,3	cyclictest	3997865	-21	kworker/u8:0+flush-259:0	00:35:16	0
3665524	99	27	23,3	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	21:45:27	3
3665524	99	27	22,3	cyclictest	3811114	-21	/usr/sbin/munin	21:30:36	3
3665519	99	27	24,2	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	21:40:24	2
3665516	99	27	22,3	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	22:20:00	1
3665516	99	27	22,3	cyclictest	3775070	-21	apt-get	20:55:11	1
3665516	99	27	21,4	cyclictest	3934721	-21	ntpq	23:25:22	1
3665514	99	27	21,5	cyclictest	3733052	-21	latency_hist	20:15:01	0
3665514	99	27	21,5	cyclictest	3733052	-21	latency_hist	20:15:00	0
3665524	99	26	22,3	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	22:05:00	3
3665524	99	26	22,3	cyclictest	3800570	-21	kworker/u8:1+events_unbound	00:20:22	3
3665524	99	26	22,3	cyclictest	3701704	-21	kworker/u8:2+flush-259:0	20:35:29	3
3665524	99	26	21,3	cyclictest	3758895	-21	apt-get	20:40:01	3
3665519	99	26	20,4	cyclictest	3966619	-21	latency_hist	00:00:01	2
3665516	99	26	20,4	cyclictest	3873209	-21	/usr/sbin/munin	22:30:14	1
3665516	99	26	20,4	cyclictest	3873209	-21	/usr/sbin/munin	22:30:14	1
3665514	99	26	23,2	cyclictest	3987792	-21	kworker/u8:2+events_unbound	00:25:20	0
3665514	99	26	23,2	cyclictest	3800570	-21	kworker/u8:1+events_unbound	22:05:14	0
3665514	99	26	22,3	cyclictest	3920336	-21	kworker/u8:2+events_unbound	23:35:25	0
3665514	99	26	22,3	cyclictest	3790298	-21	kworker/u8:0+events_unbound	21:10:22	0
3665514	99	26	20,4	cyclictest	335557	-21	systemd-journal	20:35:29	0
3665524	99	25	22,2	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	23:10:28	3
3665524	99	25	21,3	cyclictest	3899325	-21	kworker/u8:4+events_unbound	23:30:18	3
3665524	99	25	21,3	cyclictest	3826427	-21	kworker/u8:0+events_unbound	21:50:15	3
3665524	99	25	21,3	cyclictest	3800570	-21	kworker/u8:1+events_unbound	22:10:18	3
3665524	99	25	19,4	cyclictest	3728113	-21	/usr/sbin/munin	20:10:20	3
3665524	99	25	19,4	cyclictest	3728113	-21	/usr/sbin/munin	20:10:19	3
3665519	99	25	18,5	cyclictest	3956289	-21	latency_hist	23:50:01	2
3665516	99	25	22,2	cyclictest	3701704	-21	kworker/u8:2+flush-259:0	19:55:21	1
3665516	99	25	22,2	cyclictest	3601490	-21	kworker/u8:0+events_unbound	19:15:20	1
3665516	99	25	20,3	cyclictest	3681213	-21	apt-get	19:25:11	1
3665514	99	25	23,2	cyclictest	3826427	-21	kworker/u8:0+events_unbound	21:55:23	0
3665524	99	24	22,1	cyclictest	3800570	-21	kworker/u8:1+events_unbound	23:05:25	3
3665524	99	24	20,3	cyclictest	3743426	-21	kworker/u8:3+flush-259:0	20:45:24	3
3665516	99	24	20,3	cyclictest	3920336	-21	kworker/u8:2+flush-259:0	23:15:21	1
3665516	99	24	20,3	cyclictest	3800570	-21	kworker/u8:1+flush-259:0	22:25:17	1
3665516	99	24	19,4	cyclictest	3987792	-21	kworker/u8:2+flush-259:0	00:25:20	1
3665516	99	24	17,5	cyclictest	3790493	-21	/usr/sbin/munin	21:10:11	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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