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 Thu Apr 23, 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
3810469	99	54	50,3	cyclictest	4121184	-21	kworker/u8:3+events_unbound	12:10:01	0
3810469	99	50	47,2	cyclictest	3778349	-21	kworker/u8:3+events_unbound	08:35:01	0
3810469	99	46	42,3	cyclictest	3904047	-21	kworker/u8:1+flush-259:0	09:25:00	0
3810479	99	45	39,4	cyclictest	3836151	-21	latency_hist	07:35:01	3
3810479	99	44	42,1	cyclictest	3872766	-21	fwupd	08:06:26	3
3810469	99	44	41,2	cyclictest	3757639	-21	kworker/u8:2+events_unbound	09:00:01	0
3810469	99	44	40,3	cyclictest	3757639	-21	kworker/u8:2+events_unbound	07:15:24	0
3810469	99	42	37,3	cyclictest	4069621	-21	apt-get	11:20:12	0
3810469	99	41	38,2	cyclictest	3992109	-21	kworker/u8:1+events_unbound	10:10:14	0
3810469	99	41	37,3	cyclictest	3992109	-21	kworker/u8:1+flush-259:0	10:20:20	0
3810469	99	40	36,3	cyclictest	4023015	-21	kworker/u8:3+events_unbound	11:40:22	0
3810469	99	39	36,2	cyclictest	3934998	-21	kworker/u8:0+flush-259:0	09:15:24	0
3810471	99	38	33,4	cyclictest	3960771	-21	apt-get	09:35:03	1
3810471	99	38	32,4	cyclictest	4131238	-21	ntpq	12:15:22	1
3810471	99	38	31,5	cyclictest	4084805	-21	latency_hist	11:35:00	1
3810469	99	38	35,2	cyclictest	4126829	-21	kworker/u8:1+flush-259:0	12:35:25	0
3810469	99	38	34,3	cyclictest	3757639	-21	kworker/u8:2+events_unbound	07:45:18	0
3810469	99	37	34,2	cyclictest	3924701	-21	kworker/u8:3+events_unbound	09:00:20	0
3810469	99	37	30,5	cyclictest	3997235	-21	latency_hist	10:10:00	0
3810469	99	36	32,3	cyclictest	4023015	-21	kworker/u8:3+events_unbound	10:40:20	0
3810479	99	35	31,3	cyclictest	3992109	-21	kworker/u8:1+flush-259:0	10:50:01	3
3810471	99	35	27,6	cyclictest	3867924	-21	latency_hist	08:05:01	1
3810469	99	35	32,2	cyclictest	4002371	-21	kworker/u8:0+flush-259:0	10:45:25	0
3810469	99	35	32,2	cyclictest	3757639	-21	kworker/u8:2+events_unbound	08:50:23	0
3810479	99	34	28,4	cyclictest	252	-21	systemd-journal	08:20:27	3
3810469	99	34	31,3	cyclictest	3757639	-21	kworker/u8:2+flush-259:0	08:05:23	0
3810469	99	34	30,3	cyclictest	3757639	-21	kworker/u8:2+events_unbound	08:20:15	0
3810469	99	34	28,2	cyclictest	4023015	-21	kworker/u8:3+events_unbound	11:10:14	0
3810469	99	33	29,3	cyclictest	3778349	-21	kworker/u8:3+events_unbound	07:25:23	0
3810469	99	33	28,4	cyclictest	4002371	-21	kworker/u8:0+flush-259:0	11:45:21	0
3810469	99	33	27,4	cyclictest	4132128	-21	latency_hist	12:20:01	0
3810474	99	32	26,5	cyclictest	4104949	-21	ntpq	11:50:20	2
3810474	99	32	24,6	cyclictest	4053054	-21	ntpq	11:00:21	2
3810471	99	32	27,3	cyclictest	4147808	-21	/usr/sbin/munin	12:35:14	1
3810469	99	32	29,3	cyclictest	4126829	-21	kworker/u8:1+flush-259:0	12:20:22	0
3810469	99	32	27,3	cyclictest	4142187	-21	kworker/u8:2+events_unbound	12:30:18	0
3810469	99	32	26,5	cyclictest	4080058	-21	diskstats	11:30:13	0
3810471	99	31	23,5	cyclictest	4048753	-21	latency_hist	11:00:01	1
3810469	99	31	28,2	cyclictest	3778349	-21	kworker/u8:3+events_unbound	07:55:15	0
3810469	99	31	28,2	cyclictest	21	1	rcuc/0	07:50:23	0
3810469	99	31	27,3	cyclictest	3778349	-21	kworker/u8:3+events_unbound	07:35:25	0
3810469	99	31	27,3	cyclictest	3778349	-21	kworker/u8:3+events_unbound	07:20:23	0
3810469	99	31	26,3	cyclictest	252	-21	systemd-journal	09:44:24	0
3810471	99	30	25,3	cyclictest	4002371	-21	kworker/u8:0+flush-259:0	10:20:01	1
3810469	99	30	27,2	cyclictest	3934998	-21	kworker/u8:0+flush-259:0	09:30:20	0
3810479	99	29	23,4	cyclictest	252	-21	systemd-journal	08:49:59	3
3810471	99	29	24,4	cyclictest	3862367	-21	gpgv	08:00:00	1
3810471	99	29	23,4	cyclictest	3924683	-21	latency_hist	09:00:00	1
3810469	99	29	26,2	cyclictest	4002371	-21	kworker/u8:0+events_unbound	11:15:14	0
3810469	99	29	26,2	cyclictest	3934998	-21	kworker/u8:0+events_unbound	09:35:18	0
3810469	99	29	25,3	cyclictest	3757639	-21	kworker/u8:2+events_unbound	08:40:22	0
3810469	99	29	25,3	cyclictest	3757639	-21	kworker/u8:2+events_unbound	08:00:02	0
3810469	99	29	22,3	cyclictest	4002371	-21	kworker/u8:0+events_unbound	10:15:17	0
3810479	99	28	25,2	cyclictest	3778349	-21	kworker/u8:3+flush-259:0	08:35:16	3
3810469	99	28	25,2	cyclictest	4023015	-21	kworker/u8:3+events_unbound	11:25:14	0
3810479	99	27	23,3	cyclictest	3888570	-21	kworker/u8:0+flush-259:0	08:25:16	3
3810479	99	27	22,4	cyclictest	3778349	-21	kworker/u8:3+flush-259:0	08:15:00	3
3810479	99	27	21,4	cyclictest	4059063	-21	latency_hist	11:10:00	3
3810479	99	27	21,4	cyclictest	3894164	-21	diskstats	08:30:12	3
3810471	99	27	20,5	cyclictest	4094667	-21	ntpq	11:40:21	1
3810471	99	27	20,5	cyclictest	4053896	-21	latency_hist	11:05:00	1
3810471	99	27	20,5	cyclictest	4011798	-21	ntpq	10:20:19	1
3810469	99	27	24,2	cyclictest	3981825	-21	kworker/u8:3+events_unbound	10:00:21	0
3810469	99	27	24,2	cyclictest	3934998	-21	kworker/u8:0+flush-259:0	09:50:24	0
3810469	99	27	23,3	cyclictest	3778349	-21	kworker/u8:3+events_unbound	08:35:24	0
3810479	99	26	22,3	cyclictest	4002371	-21	kworker/u8:0+flush-259:0	11:20:00	3
3810479	99	26	21,4	cyclictest	252	-21	systemd-journal	11:05:00	3
3810474	99	26	20,4	cyclictest	4141495	-21	ntpq	12:25:20	2
3810471	99	26	20,4	cyclictest	3815885	-21	apt-get	07:15:12	1
3810471	99	26	20,4	cyclictest	252	-21	systemd-journal	11:30:00	1
3810471	99	26	20,4	cyclictest	252	-21	systemd-journal	09:15:00	1
3810469	99	26	22,3	cyclictest	3778349	-21	kworker/u8:3+flush-259:0	08:15:27	0
3810479	99	25	21,3	cyclictest	4121184	-21	kworker/u8:3+flush-259:0	12:10:00	3
3810474	99	25	19,4	cyclictest	3971499	-21	latency_hist	09:45:00	2
3810471	99	25	19,4	cyclictest	4142405	-21	latency_hist	12:30:01	1
3810469	99	25	22,2	cyclictest	4132172	-21	kworker/u8:0+events_unbound	12:25:14	0
3810469	99	25	21,3	cyclictest	4100895	-21	kworker/u8:2+events_unbound	11:50:19	0
3810469	99	25	21,3	cyclictest	4002371	-21	kworker/u8:0+events_unbound	12:12:26	0
3810479	99	24	20,3	cyclictest	3904047	-21	kworker/u8:1+flush-259:0	09:25:26	3
3810479	99	24	20,3	cyclictest	3904047	-21	kworker/u8:1+flush-259:0	09:25:25	3
3810479	99	24	19,4	cyclictest	3945521	-21	/usr/sbin/munin	09:20:14	3
3810479	99	24	19,3	cyclictest	3987191	-21	/usr/sbin/munin	10:00:19	3
3810479	99	24	18,4	cyclictest	4126967	-21	latency_hist	12:15:01	3
3810479	99	24	18,4	cyclictest	252	-21	systemd-journal	10:26:24	3
3810479	99	24	18,4	cyclictest	252	-21	systemd-journal	10:19:56	3
3810474	99	24	18,4	cyclictest	4111034	-21	latency_hist	12:00:01	2
3810474	99	24	17,5	cyclictest	4068431	-21	ntpq	11:15:19	2
3810471	99	24	20,3	cyclictest	509	-21	rs:main		1
3810471	99	24	19,4	cyclictest	3992109	-21	kworker/u8:1+flush-259:0	10:15:00	1
3810471	99	24	19,3	cyclictest	252	-21	systemd-journal	09:23:25	1
3810469	99	24	21,2	cyclictest	4023015	-21	kworker/u8:3+flush-259:0	11:05:25	0
3810474	99	23	18,4	cyclictest	4073561	-21	ntpq	11:20:21	2
3810471	99	23	18,4	cyclictest	4132389	-21	apt-get	12:20:10	1
3810469	99	23	20,2	cyclictest	3934998	-21	kworker/u8:0+events_unbound	09:45:14	0
3810479	99	22	20,1	cyclictest	4089933	-21	sh	11:39:59	3
3810474	99	22	19,2	cyclictest	3934998	-21	kworker/u8:0+flush-259:0	09:50:00	2
3810474	99	22	16,4	cyclictest	3830168	-21	ntpq	07:25:20	2
3810471	99	22	17,4	cyclictest	3757639	-21	kworker/u8:2+flush-259:0	08:55:00	1
3810471	99	22	15,5	cyclictest	3959906	-21	ntpq	09:30:22	1
3810471	99	22	14,7	cyclictest	0	-21	swapper/1	08:15:00	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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