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 Sat Jul 04, 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
3542613	99	51	45,4	cyclictest	3782431	-21	latency_hist	11:00:00	2
3542618	99	47	41,4	cyclictest	3839323	-21	latency_hist	11:55:01	3
3542613	99	47	41,4	cyclictest	3751473	-21	latency_hist	10:30:01	2
3542610	99	47	43,3	cyclictest	3683128	-21	kworker/u8:4+flush-259:0	09:55:15	1
3542610	99	47	42,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:44:59	1
3542613	99	44	40,3	cyclictest	3730444	-21	kworker/u8:3+flush-259:0	10:35:16	2
3542613	99	42	37,3	cyclictest	335557	-21	systemd-journal	12:25:01	2
3542618	99	41	37,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	07:20:00	3
3542613	99	38	34,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:50:00	2
3542610	99	38	33,3	cyclictest	3829202	-21	kworker/u8:3+events_unbound	12:20:00	1
3542608	99	38	31,5	cyclictest	3709832	-21	latency_hist	09:50:01	0
3542618	99	37	30,4	cyclictest	3630632	-21	apt-get	08:35:00	3
3542610	99	37	33,3	cyclictest	3651611	-21	kworker/u8:2+flush-259:0	09:00:16	1
3542610	99	37	33,3	cyclictest	3651611	-21	kworker/u8:2+flush-259:0	09:00:15	1
3542610	99	37	33,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:55:00	1
3542610	99	37	30,5	cyclictest	3589006	-21	latency_hist	07:55:02	1
3542610	99	36	32,3	cyclictest	3661951	-21	kworker/u8:5+flush-259:0	09:45:24	1
3542610	99	36	32,3	cyclictest	3542563	-21	kworker/u8:1+events_unbound	08:05:24	1
3542613	99	35	31,3	cyclictest	3793038	-21	/usr/sbin/munin	11:10:14	2
3542610	99	35	32,2	cyclictest	3672987	-21	kworker/u8:3+flush-259:0	09:15:22	1
3542610	99	35	29,4	cyclictest	335557	-21	systemd-journal	11:45:00	1
3542618	99	34	30,3	cyclictest	3661951	-21	kworker/u8:5+flush-259:0	09:25:00	3
3542610	99	34	31,2	cyclictest	3699294	-21	kworker/u8:1+flush-259:0	10:10:23	1
3542610	99	34	27,5	cyclictest	3558072	-21	latency_hist	07:25:01	1
3542618	99	33	28,3	cyclictest	3725523	-21	/usr/sbin/munin	10:05:14	3
3542618	99	33	26,5	cyclictest	3677970	-21	latency_hist	09:20:01	3
3542610	99	32	28,3	cyclictest	3777300	-21	kworker/u8:1+events_unbound	11:05:24	1
3542610	99	32	28,3	cyclictest	3766983	-21	kworker/u8:0+flush-259:0	10:50:21	1
3542610	99	31	27,3	cyclictest	3724762	-21	kworker/u8:2+flush-259:0	10:05:25	1
3542613	99	30	25,4	cyclictest	335557	-21	systemd-journal	10:35:00	2
3542613	99	30	22,7	cyclictest	3730444	-21	kworker/u8:3+flush-259:0	10:15:01	2
3542610	99	30	26,3	cyclictest	3871375	-21	kworker/u8:2+events_unbound	12:25:25	1
3542610	99	30	26,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:30:16	1
3542608	99	30	25,3	cyclictest	3704276	-21	latency_hist	09:45:00	0
3542618	99	29	26,2	cyclictest	3745919	-21	gpgv	10:25:01	3
3542610	99	29	25,3	cyclictest	3855918	-21	apt-get	12:10:12	1
3542610	99	29	25,3	cyclictest	3604424	-21	kworker/u8:3+flush-259:0	08:10:13	1
3542610	99	29	25,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:20:25	1
3542610	99	29	25,3	cyclictest	3542563	-21	kworker/u8:1+events_unbound	07:59:46	1
3542610	99	29	24,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:15:19	1
3542608	99	29	24,4	cyclictest	3547724	-21	latency_hist	07:15:00	0
3542618	99	28	25,2	cyclictest	3683128	-21	kworker/u8:4+flush-259:0	09:50:14	3
3542608	99	28	24,2	cyclictest	3805717	-21	kworker/u8:1+flush-259:0	11:35:17	0
3542610	99	27	24,2	cyclictest	3871375	-21	kworker/u8:2+events_unbound	12:30:16	1
3542610	99	27	23,3	cyclictest	3805717	-21	kworker/u8:1+events_unbound	11:30:21	1
3542610	99	27	23,3	cyclictest	3756907	-21	apt-get	10:35:14	1
3542610	99	27	18,7	cyclictest	335557	-21	systemd-journal	12:10:00	1
3542608	99	27	21,5	cyclictest	3850489	-21	latency_hist	12:05:00	0
3542613	99	26	22,3	cyclictest	3589028	-21	kworker/u8:2+flush-259:0	07:55:00	2
3542613	99	26	22,2	cyclictest	3542563	-21	kworker/u8:1+events_unbound	08:45:00	2
3542610	99	26	22,3	cyclictest	3808554	-21	kworker/u8:2+events_unbound	11:56:44	1
3542610	99	26	22,3	cyclictest	3766983	-21	kworker/u8:0+flush-259:0	11:25:20	1
3542610	99	26	21,3	cyclictest	3583497	-21	kworker/u8:0+flush-259:0	08:00:19	1
3542608	99	26	22,3	cyclictest	3672754	-21	latency_hist	09:15:00	0
3542608	99	26	20,4	cyclictest	3625476	-21	latency_hist	08:30:00	0
3542608	99	26	20,3	cyclictest	3646473	-21	unin-run	08:50:00	0
3542608	99	26	0,25	cyclictest	3563265	-21	unin-run	07:30:00	0
3542618	99	25	20,4	cyclictest	3876332	-21	latency_hist	12:30:01	3
3542613	99	25	22,2	cyclictest	3699294	-21	kworker/u8:1+flush-259:0	09:40:16	2
3542613	99	25	21,3	cyclictest	3871375	-21	kworker/u8:2+flush-259:0	12:35:26	2
3542613	99	25	21,3	cyclictest	3683128	-21	kworker/u8:4+flush-259:0	09:55:17	2
3542610	99	25	22,2	cyclictest	3871375	-21	kworker/u8:2+events_unbound	12:35:14	1
3542610	99	25	22,2	cyclictest	3724762	-21	kworker/u8:2+flush-259:0	10:25:27	1
3542610	99	25	22,2	cyclictest	3499672	-21	kworker/u8:2+flush-259:0	07:45:18	1
3542618	99	24	20,3	cyclictest	3704384	-21	gpgv	09:45:01	3
3542613	99	24	21,2	cyclictest	3767196	-21	kworker/u8:4+flush-259:0	11:15:18	2
3542613	99	24	18,5	cyclictest	3655835	-21	ntpq	08:55:20	2
3542613	99	24	17,5	cyclictest	3609122	-21	ntpq	08:10:19	2
3542610	99	24	20,3	cyclictest	3542563	-21	kworker/u8:1+events_unbound	07:29:42	1
3542610	99	24	19,4	cyclictest	3542563	-21	kworker/u8:1+events_unbound	07:42:44	1
3542610	99	24	19,3	cyclictest	3740971	-21	apt-get	10:20:11	1
3542608	99	24	20,3	cyclictest	3805717	-21	kworker/u8:1+flush-259:0	11:30:17	0
3542613	99	23	19,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:05:14	2
3542613	99	23	18,4	cyclictest	335557	-21	systemd-journal	09:30:01	2
3542610	99	23	20,2	cyclictest	3760892	-21	kworker/u8:1+events_unbound	10:40:23	1
3542610	99	23	19,3	cyclictest	3777300	-21	kworker/u8:1+events_unbound	10:55:20	1
3542610	99	23	19,3	cyclictest	3509953	-21	kworker/u8:3+flush-259:0	07:10:17	1
3542610	99	23	18,4	cyclictest	3720441	-21	apt-get	10:00:09	1
3542610	99	23	18,3	cyclictest	3805717	-21	kworker/u8:1+flush-259:0	11:39:59	1
3542618	99	22	18,3	cyclictest	3839984	-21	munin-node	11:55:13	3
3542613	99	22	15,5	cyclictest	3792844	-21	cat	11:10:00	2
3542610	99	22	19,2	cyclictest	3767196	-21	kworker/u8:4+events_unbound	10:45:26	1
3542610	99	22	19,2	cyclictest	3499672	-21	kworker/u8:2+events_unbound	07:15:13	1
3542610	99	22	18,3	cyclictest	3672987	-21	kworker/u8:3+events_unbound	09:20:44	1
3542610	99	22	16,4	cyclictest	335557	-21	systemd-journal	12:00:01	1
3542608	99	22	18,3	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:15:00	0
3542618	99	21	17,3	cyclictest	3610066	-21	kworker/u8:0+flush-259:0	08:25:00	3
3542618	99	21	16,3	cyclictest	0	-21	swapper/3	08:15:01	3
3542618	99	21	14,5	cyclictest	335557	-21	systemd-journal	09:40:00	3
3542610	99	21	18,2	cyclictest	3651611	-21	kworker/u8:2+flush-259:0	09:05:21	1
3542610	99	21	17,3	cyclictest	3793030	-21	kworker/u8:3+events_unbound	11:10:20	1
3542610	99	21	17,3	cyclictest	3767196	-21	kworker/u8:4+events_unbound	11:15:20	1
3542610	99	21	17,3	cyclictest	3661951	-21	kworker/u8:5+flush-259:0	09:30:24	1
3542608	99	21	18,2	cyclictest	3542563	-21	kworker/u8:1+flush-259:0	08:30:17	0
3542608	99	21	15,5	cyclictest	3766064	-21	ntpq	10:40:21	0
3542618	99	20	15,4	cyclictest	3823630	-40	mandb	11:38:21	3
3542613	99	20	16,3	cyclictest	3844934	-21	gpgv	12:00:00	2
3542613	99	20	14,4	cyclictest	3620343	-21	latency_hist	08:25:01	2
3542613	99	20	14,4	cyclictest	335557	-21	systemd-journal	08:00:43	2
3542610	99	20	17,2	cyclictest	3766983	-21	kworker/u8:0+flush-259:0	11:20:25	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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