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 Tue Jun 09, 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
3693588	99	45	38,4	cyclictest	3781638	-21	latency_hist	20:35:01	0
3693591	99	44	41,2	cyclictest	3654268	-21	kworker/u8:4+events_unbound	20:40:24	3
3693591	99	43	40,2	cyclictest	3974684	-21	kworker/u8:1+events_unbound	23:55:01	3
3693589	99	43	39,3	cyclictest	3917078	-21	latency_hist	22:45:00	1
3693591	99	42	40,1	cyclictest	3654268	-21	kworker/u8:4+flush-259:0	19:55:00	3
3693590	99	42	37,3	cyclictest	3750481	-21	/usr/sbin/munin	20:05:25	2
3693591	99	40	37,2	cyclictest	3911892	-21	kworker/u8:0+flush-259:0	23:20:16	3
3693591	99	39	35,3	cyclictest	3654268	-21	kworker/u8:4+flush-259:0	20:20:14	3
3693591	99	39	35,3	cyclictest	3654268	-21	kworker/u8:4+flush-259:0	20:20:14	3
3693590	99	39	33,4	cyclictest	3891050	-21	kworker/u8:0+flush-259:0	22:19:59	2
3693591	99	38	35,2	cyclictest	3849382	-21	kworker/u8:4+flush-259:0	21:55:16	3
3693591	99	37	34,2	cyclictest	3677596	-21	kworker/u8:1+events_unbound	19:35:23	3
3693591	99	37	34,2	cyclictest	3654268	-21	kworker/u8:4+flush-259:0	19:10:21	3
3693591	99	37	33,3	cyclictest	3957886	-21	kworker/u8:1+flush-259:0	23:25:21	3
3693588	99	37	31,4	cyclictest	4030609	-21	ntpq	00:30:21	0
3693588	99	37	30,5	cyclictest	3964348	-21	latency_hist	23:30:00	0
3693591	99	36	33,2	cyclictest	3683418	-21	kworker/u8:2+flush-259:0	19:25:16	3
3693591	99	36	32,3	cyclictest	3703868	-21	kworker/u8:3+events_unbound	19:20:20	3
3693589	99	36	30,4	cyclictest	335557	-21	systemd-journal	21:36:14	1
3693591	99	35	32,2	cyclictest	3781408	-21	kworker/u8:0+events_unbound	21:30:23	3
3693590	99	34	32,1	cyclictest	3688499	-21	kworker/2:1+pm	20:26:28	2
3693588	99	34	28,4	cyclictest	3859494	-21	apt-get	21:50:00	0
3693590	99	33	29,3	cyclictest	3964575	-21	kworker/u8:0+flush-259:0	23:30:21	2
3693590	99	33	28,3	cyclictest	3771316	-21	latency_hist	20:25:01	2
3693590	99	33	28,3	cyclictest	3771316	-21	latency_hist	20:25:00	2
3693589	99	33	28,3	cyclictest	3745338	-21	/usr/sbin/munin	20:00:14	1
3693591	99	32	28,3	cyclictest	4010911	-21	kworker/u8:0+flush-259:0	00:25:14	3
3693591	99	32	28,3	cyclictest	3943540	-21	kworker/u8:2+events_unbound	23:10:22	3
3693591	99	32	28,3	cyclictest	3876008	-21	kworker/u8:3+events_unbound	22:55:00	3
3693591	99	31	27,3	cyclictest	4010911	-21	kworker/u8:0+events_unbound	00:15:23	3
3693590	99	31	26,4	cyclictest	3849382	-21	kworker/u8:4+flush-259:0	22:15:00	2
3693589	99	31	24,4	cyclictest	3906780	-21	latency_hist	22:35:00	1
3693591	99	30	24,4	cyclictest	3922636	-21	latency_hist	22:50:00	3
3693590	99	30	27,2	cyclictest	3990358	-21	kworker/u8:2+events_unbound	00:10:00	2
3693590	99	30	23,5	cyclictest	3776931	-21	diskstats	20:30:13	2
3693589	99	30	24,4	cyclictest	3938147	-21	latency_hist	23:05:00	1
3693591	99	29	26,2	cyclictest	3755608	-21	kworker/u8:3+flush-259:0	20:35:24	3
3693591	99	29	23,4	cyclictest	335557	-21	systemd-journal	23:35:00	3
3693590	99	29	22,5	cyclictest	3974667	-21	latency_hist	23:40:01	2
3693591	99	28	25,2	cyclictest	3990358	-21	kworker/u8:2+flush-259:0	23:55:18	3
3693591	99	28	25,2	cyclictest	3802951	-21	kworker/u8:3+events_unbound	21:10:14	3
3693591	99	28	24,3	cyclictest	3943540	-21	kworker/u8:2+events_unbound	23:35:22	3
3693590	99	28	24,3	cyclictest	3876008	-21	kworker/u8:3+flush-259:0	22:55:16	2
3693590	99	28	23,3	cyclictest	3876008	-21	kworker/u8:3+events_unbound	22:35:15	2
3693588	99	28	22,4	cyclictest	3755608	-21	kworker/u8:3+flush-259:0	20:40:17	0
3693591	99	27	24,2	cyclictest	4010911	-21	kworker/u8:0+events_unbound	00:20:19	3
3693591	99	27	24,2	cyclictest	3922663	-21	kworker/u8:4+events_unbound	00:00:20	3
3693591	99	27	24,2	cyclictest	3876008	-21	kworker/u8:3+events_unbound	22:15:20	3
3693591	99	27	24,2	cyclictest	3875384	-21	kworker/u8:1+flush-259:0	22:20:15	3
3693591	99	27	23,3	cyclictest	3974684	-21	kworker/u8:1+events_unbound	00:35:22	3
3693591	99	27	23,3	cyclictest	3849382	-21	kworker/u8:4+flush-259:0	21:47:28	3
3693589	99	27	21,5	cyclictest	3985229	-21	apt-get	23:50:10	1
3693589	99	27	21,4	cyclictest	3886387	-21	/usr/sbin/munin	22:15:11	1
3693591	99	26	23,2	cyclictest	3849382	-21	kworker/u8:4+flush-259:0	22:05:22	3
3693591	99	26	22,3	cyclictest	3802951	-21	kworker/u8:3+flush-259:0	21:00:18	3
3693591	99	26	19,2	cyclictest	3974684	-21	kworker/u8:1+events_unbound	00:10:20	3
3693590	99	26	22,3	cyclictest	4026526	-21	kworker/u8:4+events_unbound	00:30:20	2
3693590	99	26	22,3	cyclictest	3781408	-21	kworker/u8:0+events_unbound	20:45:15	2
3693590	99	26	21,4	cyclictest	335557	-21	systemd-journal	21:15:15	2
3693590	99	26	19,5	cyclictest	335557	-21	systemd-journal	20:45:00	2
3693589	99	26	23,2	cyclictest	3813269	-21	apt-get	21:05:11	1
3693589	99	26	22,3	cyclictest	3849382	-21	kworker/u8:4+flush-259:0	22:04:59	1
3693588	99	26	21,3	cyclictest	3802951	-21	kworker/u8:3+flush-259:0	21:10:25	0
3693588	99	26	21,3	cyclictest	335557	-21	systemd-journal	20:37:22	0
3693591	99	25	22,2	cyclictest	3990358	-21	kworker/u8:2+flush-259:0	00:30:20	3
3693591	99	25	21,3	cyclictest	3849382	-21	kworker/u8:4+events_unbound	22:12:17	3
3693590	99	25	22,2	cyclictest	3677596	-21	kworker/u8:1+events_unbound	19:35:15	2
3693590	99	25	21,3	cyclictest	3781408	-21	kworker/u8:0+flush-259:0	21:40:25	2
3693590	99	25	20,4	cyclictest	3943540	-21	kworker/u8:2+events_unbound	23:43:05	2
3693589	99	25	21,3	cyclictest	3797215	-21	gpgv	20:50:01	1
3693588	99	25	20,3	cyclictest	3964582	-21	/usr/sbin/munin	23:30:13	0
3693591	99	24	22,2	cyclictest	3911892	-21	kworker/u8:0+events_unbound	23:20:00	3
3693591	99	24	21,2	cyclictest	3922663	-21	kworker/u8:4+events_unbound	23:50:01	3
3693591	99	24	21,2	cyclictest	3875384	-21	kworker/u8:1+events_unbound	22:30:18	3
3693591	99	24	21,2	cyclictest	3828234	-21	kworker/u8:1+flush-259:0	21:25:23	3
3693591	99	24	20,3	cyclictest	3844205	-21	kworker/u8:3+events_unbound	21:35:18	3
3693591	99	24	20,3	cyclictest	3802951	-21	kworker/u8:3+events_unbound	21:21:15	3
3693591	99	24	18,4	cyclictest	3750239	-21	latency_hist	20:05:01	3
3693590	99	24	20,3	cyclictest	3733846	-21	kworker/u8:1+events_unbound	19:54:16	2
3693590	99	24	20,3	cyclictest	3714420	-21	kworker/u8:0+events_unbound	19:32:16	2
3693590	99	24	20,3	cyclictest	3654268	-21	kworker/u8:4+events_unbound	19:44:17	2
3693590	99	24	19,4	cyclictest	3917640	-21	gpgv	22:45:00	2
3693589	99	24	20,3	cyclictest	3980069	-21	apt-get	23:45:12	1
3693589	99	24	18,4	cyclictest	3932080	-21	ntpq	22:55:20	1
3693591	99	23	21,2	cyclictest	3876008	-21	kworker/u8:3+events_unbound	22:37:50	3
3693591	99	23	20,2	cyclictest	3922663	-21	kworker/u8:4+flush-259:0	23:00:23	3
3693591	99	23	20,2	cyclictest	3875384	-21	kworker/u8:1+flush-259:0	22:25:24	3
3693591	99	23	20,2	cyclictest	3714420	-21	kworker/u8:0+flush-259:0	19:45:26	3
3693591	99	23	19,3	cyclictest	3943540	-21	kworker/u8:2+events_unbound	23:40:12	3
3693590	99	23	20,2	cyclictest	3990358	-21	kworker/u8:2+events_unbound	00:15:15	2
3693590	99	23	19,3	cyclictest	3849382	-21	kworker/u8:4+flush-259:0	21:55:18	2
3693590	99	23	19,2	cyclictest	3943540	-21	kworker/u8:2+flush-259:0	23:10:21	2
3693590	99	23	18,4	cyclictest	3859533	-21	gpgv	21:49:59	2
3693590	99	23	17,4	cyclictest	3870634	-21	diskstats	22:00:13	2
3693589	99	23	19,3	cyclictest	4031761	-21	apt-get	00:35:11	1
3693589	99	23	18,3	cyclictest	3860193	-21	apt-get	21:50:12	1
3693589	99	23	18,3	cyclictest	335557	-21	systemd-journal	22:08:16	1
3693589	99	23	17,4	cyclictest	3969744	-21	/usr/sbin/munin	23:35:14	1
3693590	99	22	19,2	cyclictest	3875384	-21	kworker/u8:1+flush-259:0	22:25:22	2
3693590	99	22	18,3	cyclictest	4010911	-21	kworker/u8:0+flush-259:0	00:20:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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