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 Mon May 18, 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
3967345	99	80	77,2	cyclictest	84340	-21	kworker/u8:0+events_unbound	12:15:04	2
3967350	99	47	45,1	cyclictest	22026	-21	fwupd	11:06:59	3
3967345	99	39	35,2	cyclictest	4128201	-21	kworker/u8:1+events_unbound	10:50:24	2
3967345	99	38	35,2	cyclictest	3982558	-21	kworker/u8:1+flush-259:0	07:45:24	2
3967345	99	38	32,4	cyclictest	3903180	-21	kworker/u8:3+flush-259:0	07:50:23	2
3967345	99	37	34,2	cyclictest	4143643	-21	kworker/u8:3+events_unbound	10:10:01	2
3967345	99	34	31,2	cyclictest	3982558	-21	kworker/u8:1+events_unbound	08:15:24	2
3967345	99	34	28,4	cyclictest	79180	-21	latency_hist	12:05:00	2
3967333	99	34	31,2	cyclictest	3903180	-21	kworker/u8:3+events_unbound	07:15:20	0
3967350	99	33	29,3	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	10:00:23	3
3967345	99	33	30,2	cyclictest	4169855	-21	kworker/u8:2+events_unbound	10:35:25	2
3967345	99	32	27,3	cyclictest	4029235	-21	gpgv	08:10:00	2
3967341	99	32	27,4	cyclictest	252	-21	systemd-journal	12:24:59	1
3967341	99	32	26,4	cyclictest	4175256	-21	apt-get	10:30:12	1
3967341	99	32	26,4	cyclictest	4175256	-21	apt-get	10:30:11	1
3967341	99	32	26,4	cyclictest	4133336	-21	latency_hist	09:50:00	1
3967333	99	32	26,4	cyclictest	4164664	-21	latency_hist	10:20:01	0
3967345	99	30	27,2	cyclictest	4128201	-21	kworker/u8:1+events_unbound	11:20:24	2
3967345	99	30	26,3	cyclictest	3952069	-21	kworker/u8:4+flush-259:0	07:20:23	2
3967333	99	30	24,4	cyclictest	252	-21	systemd-journal	07:44:44	0
3967345	99	29	26,2	cyclictest	3913765	-21	kworker/u8:1+flush-259:0	07:10:25	2
3967345	99	29	25,3	cyclictest	7024	-21	kworker/u8:4+events_unbound	10:55:26	2
3967333	99	29	24,3	cyclictest	4143643	-21	kworker/u8:3+flush-259:0	10:10:16	0
3967350	99	28	23,3	cyclictest	89498	-21	latency_hist	12:14:59	3
3967350	99	28	22,4	cyclictest	4096917	-21	latency_hist	09:15:01	3
3967345	99	28	25,2	cyclictest	48155	-21	kworker/u8:3+events_unbound	11:45:24	2
3967345	99	28	21,5	cyclictest	3987885	-21	latency_hist	07:30:00	2
3967333	99	28	22,4	cyclictest	6794	-21	latency_hist	10:55:01	0
3967345	99	27	24,2	cyclictest	4024001	-21	kworker/u8:0+events_unbound	08:25:14	2
3967345	99	27	20,5	cyclictest	4023130	-21	ntpq	08:00:23	2
3967350	99	26	21,3	cyclictest	252	-21	systemd-journal	07:29:56	3
3967345	99	26	23,2	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	10:40:24	2
3967345	99	26	23,2	cyclictest	22035	-21	kworker/u8:2+flush-259:0	11:35:19	2
3967345	99	26	22,3	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	12:05:15	2
3967341	99	26	22,3	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	10:09:59	1
3967345	99	25	21,3	cyclictest	4091794	-21	kworker/u8:3+events_unbound	09:20:00	2
3967345	99	25	21,3	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	10:14:59	2
3967345	99	25	20,3	cyclictest	3982558	-21	kworker/u8:1+flush-259:0	07:40:00	2
3967341	99	25	20,4	cyclictest	95201	-21	gpgv	12:20:00	1
3967350	99	24	20,3	cyclictest	4066289	-21	apt-get	08:45:12	3
3967345	99	24	21,2	cyclictest	4143643	-21	kworker/u8:3+events_unbound	10:20:58	2
3967345	99	24	21,2	cyclictest	4034918	-21	kworker/u8:2+events_unbound	09:37:59	2
3967345	99	24	20,3	cyclictest	4128442	-21	apt-get	09:45:11	2
3967345	99	24	18,4	cyclictest	4029122	-21	apt-get	08:10:05	2
3967345	99	24	17,5	cyclictest	116228	-21	latency_hist	12:40:00	2
3967345	99	24	16,3	cyclictest	7024	-21	kworker/u8:4+events_unbound	11:00:21	2
3967333	99	24	21,2	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	10:45:00	0
3967333	99	24	20,3	cyclictest	4034951	-21	apt-get	08:15:11	0
3967350	99	23	18,4	cyclictest	4060456	-21	apt-get	08:40:01	3
3967341	99	23	19,3	cyclictest	4169855	-21	kworker/u8:2+flush-259:0	10:40:16	1
3967341	99	23	17,4	cyclictest	58425	-21	latency_hist	11:45:01	1
3967333	99	23	19,3	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	09:55:23	0
3967333	99	23	19,3	cyclictest	4050445	-21	apt-get	08:30:12	0
3967333	99	23	19,3	cyclictest	3913765	-21	kworker/u8:1+flush-259:0	07:10:17	0
3967333	99	23	18,4	cyclictest	4024001	-21	kworker/u8:0+flush-259:0	08:25:17	0
3967333	99	23	18,3	cyclictest	4091794	-21	kworker/u8:3+flush-259:0	09:15:17	0
3967333	99	23	18,3	cyclictest	4034918	-21	kworker/u8:2+events_unbound	08:55:18	0
3967350	99	22	16,4	cyclictest	4153897	-21	latency_hist	10:10:01	3
3967345	99	22	19,2	cyclictest	4066043	-21	kworker/u8:0+flush-259:0	08:50:05	2
3967345	99	22	18,3	cyclictest	4143643	-21	kworker/u8:3+events_unbound	10:30:22	2
3967345	99	22	18,3	cyclictest	4143643	-21	kworker/u8:3+events_unbound	10:30:21	2
3967345	99	22	18,3	cyclictest	3982558	-21	kworker/u8:1+events_unbound	07:33:58	2
3967341	99	22	18,3	cyclictest	32894	-21	apt-get	11:20:11	1
3967333	99	22	19,2	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	09:40:21	0
3967333	99	22	16,4	cyclictest	4029767	-21	rred	08:10:03	0
3967333	99	22	1,19	cyclictest	1	-21	systemd	11:48:57	0
3967350	99	21	18,2	cyclictest	4019077	-21	apt-get	08:00:11	3
3967350	99	21	15,4	cyclictest	509	-21	rs:main		3
3967350	99	21	15,4	cyclictest	4180353	-21	apt-get	10:35:11	3
3967345	99	21	17,3	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	09:30:00	2
3967341	99	21	17,3	cyclictest	89689	-21	cp	12:15:00	1
3967341	99	21	17,3	cyclictest	4164906	-21	/usr/sbin/munin	10:20:21	1
3967341	99	21	17,3	cyclictest	4045060	-21	kworker/u8:3+flush-259:0	08:30:26	1
3967333	99	21	17,3	cyclictest	500	-21	systemd-logind	07:55:00	0
3967333	99	21	17,3	cyclictest	4143643	-21	kworker/u8:3+flush-259:0	10:30:25	0
3967333	99	21	17,3	cyclictest	4143643	-21	kworker/u8:3+flush-259:0	10:30:24	0
3967333	99	21	17,3	cyclictest	4091794	-21	kworker/u8:3+events_unbound	09:20:15	0
3967345	99	20	17,2	cyclictest	7024	-21	kworker/u8:4+events_unbound	11:05:25	2
3967345	99	20	17,2	cyclictest	37822	-21	kworker/u8:0+flush-259:0	11:55:01	2
3967345	99	20	12,3	cyclictest	4128201	-21	kworker/u8:1+events_unbound	11:30:23	2
3967341	99	20	15,4	cyclictest	252	-21	systemd-journal	11:06:58	1
3967350	99	19	15,3	cyclictest	53551	-21	apt-get	11:40:09	3
3967345	99	19	16,2	cyclictest	4066043	-21	kworker/u8:0+events_unbound	08:48:58	2
3967345	99	19	15,3	cyclictest	4034918	-21	kworker/u8:2+events_unbound	08:40:13	2
3967341	99	19	15,3	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	09:50:25	1
3967341	99	19	12,6	cyclictest	0	-21	swapper/1	09:15:01	1
3967333	99	19	15,3	cyclictest	7024	-21	kworker/u8:4+events_unbound	10:55:27	0
3967333	99	19	15,3	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	10:45:26	0
3967333	99	19	13,4	cyclictest	4170257	-21	diskstats	10:25:14	0
3967333	99	19	13,4	cyclictest	4170257	-21	diskstats	10:25:13	0
3967333	99	19	12,5	cyclictest	4029116	-21	latency_hist	08:10:00	0
3967350	99	18	14,3	cyclictest	4128201	-21	kworker/u8:1+flush-259:0	10:25:00	3
3967345	99	18	16,2	cyclictest	3982558	-21	kworker/u8:1+events_unbound	07:40:23	2
3967345	99	18	15,2	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	09:40:20	2
3967345	99	18	14,3	cyclictest	4091794	-21	kworker/u8:3+events_unbound	09:15:12	2
3967345	99	18	14,3	cyclictest	4045060	-21	kworker/u8:3+events_unbound	08:30:23	2
3967345	99	18	14,3	cyclictest	4034918	-21	kworker/u8:2+flush-259:0	08:55:16	2
3967345	99	18	14,3	cyclictest	3982558	-21	kworker/u8:1+events_unbound	07:55:12	2
3967345	99	18	13,4	cyclictest	4133604	-21	apt-get	09:50:12	2
3967345	99	18	12,4	cyclictest	1649	-21	latency_hist	10:50:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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