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 Sat May 30, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
514827	99	46	43,2	cyclictest	764427	-21	kworker/u8:0+events_unbound	11:19:59	1
514827	99	45	38,5	cyclictest	841474	-21	ntpq	12:20:20	1
514833	99	42	36,4	cyclictest	519942	-21	latency_hist	07:15:00	3
514827	99	41	36,4	cyclictest	556825	-21	kworker/u8:2+events_unbound	08:05:23	1
514827	99	39	34,3	cyclictest	519956	-21	kworker/u8:1+flush-259:0	07:45:21	1
514827	99	39	33,4	cyclictest	335557	-21	systemd-journal	12:16:33	1
514823	99	39	32,5	cyclictest	335557	-21	systemd-journal	07:55:00	0
514833	99	38	34,3	cyclictest	764560	-21	latency_hist	11:10:01	3
514827	99	38	35,2	cyclictest	816825	-21	kworker/u8:3+flush-259:0	12:10:15	1
514827	99	38	34,2	cyclictest	744094	-21	kworker/u8:4+events_unbound	11:40:18	1
514827	99	38	33,3	cyclictest	743879	-21	kworker/u8:3+flush-259:0	11:05:19	1
514823	99	38	32,4	cyclictest	743865	-21	latency_hist	10:50:00	0
514823	99	38	32,4	cyclictest	675909	-21	latency_hist	09:45:00	0
514823	99	38	32,4	cyclictest	566192	-21	ntpq	07:55:21	0
514827	99	37	31,4	cyclictest	335557	-21	systemd-journal	08:58:33	1
514827	99	36	33,2	cyclictest	499462	-21	kworker/u8:0+events_unbound	07:10:17	1
514827	99	36	31,3	cyclictest	790877	-21	kworker/u8:0+events_unbound	12:05:18	1
514831	99	35	32,2	cyclictest	806363	-21	kworker/u8:2+flush-259:0	12:20:17	2
514827	99	35	32,2	cyclictest	567137	-21	kworker/u8:1+events_unbound	08:15:18	1
514827	99	35	30,3	cyclictest	476768	-21	kworker/u8:4+events_unbound	07:15:24	1
514827	99	35	30,3	cyclictest	476768	-21	kworker/u8:4+events_unbound	07:15:24	1
514823	99	35	30,4	cyclictest	775727	-21	diskstats	11:20:14	0
514833	99	34	29,4	cyclictest	701288	-21	ntpq	10:05:22	3
514831	99	34	29,3	cyclictest	727969	-21	latency_hist	10:35:01	2
514827	99	34	31,2	cyclictest	691885	-21	kworker/u8:0+flush-259:0	10:45:21	1
514827	99	34	31,2	cyclictest	556825	-21	kworker/u8:2+events_unbound	07:50:24	1
514827	99	34	30,2	cyclictest	639751	-21	kworker/u8:5+events_unbound	09:15:16	1
514827	99	34	26,3	cyclictest	780695	-21	kworker/u8:2+events_unbound	11:25:17	1
514827	99	33	30,2	cyclictest	556825	-21	kworker/u8:2+flush-259:0	08:10:21	1
514827	99	33	28,3	cyclictest	785865	-21	/usr/sbin/munin	11:30:13	1
514831	99	32	28,3	cyclictest	701833	-21	kworker/u8:1+flush-259:0	10:25:15	2
514827	99	32	29,2	cyclictest	806363	-21	kworker/u8:2+events_unbound	12:25:23	1
514823	99	32	26,5	cyclictest	769741	-21	gpgv	11:15:01	0
514833	99	31	28,2	cyclictest	567137	-21	kworker/u8:1+flush-259:0	08:40:15	3
514831	99	31	24,5	cyclictest	629399	-21	latency_hist	09:00:00	2
514827	99	31	28,2	cyclictest	744094	-21	kworker/u8:4+flush-259:0	10:55:27	1
514827	99	31	28,2	cyclictest	624243	-21	kworker/u8:1+events_unbound	09:10:19	1
514827	99	31	27,3	cyclictest	744094	-21	kworker/u8:4+flush-259:0	10:50:15	1
514827	99	31	27,3	cyclictest	692069	-21	kworker/u8:4+events_unbound	10:15:24	1
514827	99	31	27,3	cyclictest	567137	-21	kworker/u8:1+events_unbound	08:30:15	1
514833	99	30	27,2	cyclictest	567137	-21	kworker/u8:1+flush-259:0	08:15:16	3
514831	99	30	27,2	cyclictest	613523	-21	gpgv	08:45:00	2
514827	99	30	27,2	cyclictest	582802	-21	kworker/u8:3+events_unbound	08:20:20	1
514827	99	30	26,3	cyclictest	744094	-21	kworker/u8:4+flush-259:0	11:50:21	1
514827	99	29	26,2	cyclictest	852931	-21	kworker/u8:1+flush-259:0	12:35:20	1
514827	99	29	26,2	cyclictest	712742	-21	kworker/u8:2+events_unbound	10:40:22	1
514827	99	29	25,3	cyclictest	743879	-21	kworker/u8:3+events_unbound	11:00:18	1
514827	99	29	25,3	cyclictest	556825	-21	kworker/u8:2+flush-259:0	08:05:01	1
514827	99	29	25,3	cyclictest	546577	-21	kworker/u8:0+events_unbound	07:40:13	1
514827	99	29	25,3	cyclictest	519956	-21	kworker/u8:1+events_unbound	07:25:22	1
514833	99	28	25,2	cyclictest	691885	-21	kworker/u8:0+flush-259:0	10:20:19	3
514831	99	28	24,3	cyclictest	567137	-21	kworker/u8:1+flush-259:0	08:30:17	2
514831	99	28	22,4	cyclictest	785628	-21	latency_hist	11:30:01	2
514827	99	28	25,2	cyclictest	743879	-21	kworker/u8:3+flush-259:0	11:10:22	1
514827	99	28	24,3	cyclictest	806363	-21	kworker/u8:2+events_unbound	11:58:33	1
514827	99	28	24,3	cyclictest	525117	-21	kworker/u8:3+flush-259:0	07:20:20	1
514827	99	28	24,3	cyclictest	525117	-21	kworker/u8:3+flush-259:0	07:20:20	1
514827	99	28	20,5	cyclictest	607464	-21	ntpq	08:35:20	1
514833	99	27	23,3	cyclictest	701833	-21	kworker/u8:1+flush-259:0	10:30:14	3
514831	99	27	22,4	cyclictest	624232	-21	/usr/sbin/munin	08:55:00	2
514827	99	27	23,3	cyclictest	780489	-21	kworker/u8:1+events_unbound	11:45:19	1
514833	99	26	22,3	cyclictest	827154	-21	/usr/sbin/munin	12:10:14	3
514831	99	26	22,3	cyclictest	806363	-21	kworker/u8:2+events_unbound	11:55:23	2
514831	99	26	22,3	cyclictest	546577	-21	kworker/u8:0+flush-259:0	07:55:17	2
514827	99	26	23,2	cyclictest	582802	-21	kworker/u8:3+events_unbound	08:40:23	1
514827	99	26	23,2	cyclictest	546577	-21	kworker/u8:0+events_unbound	07:55:24	1
514827	99	26	22,3	cyclictest	650145	-21	kworker/u8:2+events_unbound	09:55:13	1
514827	99	26	20,4	cyclictest	718119	-21	diskstats	10:25:13	1
514823	99	26	23,2	cyclictest	744094	-21	kworker/u8:4+flush-259:0	10:55:20	0
514831	99	25	22,2	cyclictest	519956	-21	kworker/u8:1+events_unbound	07:45:16	2
514827	99	25	22,2	cyclictest	701833	-21	kworker/u8:1+events_unbound	10:30:19	1
514827	99	25	22,2	cyclictest	624243	-21	kworker/u8:1+flush-259:0	09:00:22	1
514827	99	25	21,3	cyclictest	691885	-21	kworker/u8:0+flush-259:0	10:05:19	1
514827	99	25	18,5	cyclictest	681092	-21	latency_hist	09:50:00	1
514823	99	25	21,3	cyclictest	744094	-21	kworker/u8:4+flush-259:0	11:45:14	0
514823	99	25	20,3	cyclictest	335557	-21	systemd-journal	10:06:31	0
514833	99	24	21,2	cyclictest	780489	-21	kworker/u8:1+events_unbound	11:30:17	3
514833	99	24	21,2	cyclictest	624243	-21	kworker/u8:1+flush-259:0	09:20:25	3
514833	99	24	20,3	cyclictest	769833	-21	gpgv	11:15:00	3
514833	99	24	20,3	cyclictest	556825	-21	kworker/u8:2+flush-259:0	08:10:21	3
514831	99	24	21,2	cyclictest	676138	-21	kworker/u8:4+flush-259:0	09:45:24	2
514827	99	24	21,2	cyclictest	744094	-21	kworker/u8:4+events_unbound	11:35:24	1
514827	99	24	20,3	cyclictest	650145	-21	kworker/u8:2+flush-259:0	09:25:15	1
514827	99	24	20,3	cyclictest	624243	-21	kworker/u8:1+events_unbound	09:30:19	1
514827	99	24	20,3	cyclictest	335557	-21	systemd-journal	08:50:31	1
514823	99	24	21,2	cyclictest	582802	-21	kworker/u8:3+flush-259:0	08:20:00	0
514823	99	24	20,3	cyclictest	614151	-21	kworker/u8:4+flush-259:0	08:55:00	0
514823	99	24	20,3	cyclictest	556825	-21	kworker/u8:2+flush-259:0	08:40:00	0
514833	99	23	20,2	cyclictest	832308	-21	kworker/u8:4+flush-259:0	12:30:00	3
514833	99	23	20,2	cyclictest	546577	-21	kworker/u8:0+flush-259:0	07:40:17	3
514833	99	23	19,3	cyclictest	801392	-21	/usr/sbin/munin	11:45:18	3
514833	99	23	19,3	cyclictest	681604	-21	base64	09:50:00	3
514833	99	23	18,4	cyclictest	739008	-21	apt-get	10:45:12	3
514831	99	23	20,2	cyclictest	816825	-21	kworker/u8:3+events_unbound	12:10:19	2
514831	99	23	20,2	cyclictest	691885	-21	kworker/u8:0+events_unbound	10:15:20	2
514831	99	23	19,3	cyclictest	744094	-21	kworker/u8:4+events_unbound	11:50:01	2
514831	99	23	19,3	cyclictest	519956	-21	kworker/u8:1+events_unbound	07:35:17	2
514831	99	23	19,3	cyclictest	335557	-21	systemd-journal	11:35:00	2
514831	99	23	19,3	cyclictest	335557	-21	systemd-journal	09:15:01	2
514831	99	23	17,4	cyclictest	795996	-21	latency_hist	11:40:00	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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