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 Sun Apr 26, 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
824163	99	57	54,2	cyclictest	1053859	-21	kworker/u8:2+flush-259:0	11:15:23	0
824167	99	49	46,2	cyclictest	938949	-21	kworker/u8:0+flush-259:0	09:20:00	1
824172	99	47	44,2	cyclictest	943749	-21	fwupd	09:01:20	2
824163	99	45	42,2	cyclictest	1053859	-21	kworker/u8:2+events_unbound	11:05:23	0
824167	99	44	39,3	cyclictest	1053859	-21	kworker/u8:2+flush-259:0	10:50:14	1
824163	99	42	39,2	cyclictest	840047	-21	kworker/u8:0+flush-259:0	07:50:24	0
824167	99	41	37,3	cyclictest	1059677	-21	kworker/u8:0+flush-259:0	11:04:59	1
824163	99	41	38,2	cyclictest	818794	-21	kworker/u8:2+flush-259:0	07:35:21	0
824163	99	41	37,3	cyclictest	1053859	-21	kworker/u8:2+flush-259:0	11:40:21	0
824163	99	40	37,2	cyclictest	1002205	-21	kworker/u8:3+flush-259:0	10:30:15	0
824163	99	39	36,2	cyclictest	818794	-21	kworker/u8:2+flush-259:0	07:55:16	0
824163	99	39	36,2	cyclictest	1022841	-21	kworker/u8:0+flush-259:0	10:35:24	0
824163	99	39	35,3	cyclictest	1028201	-21	kworker/u8:1+events_unbound	10:45:17	0
824163	99	38	34,3	cyclictest	887727	-21	kworker/u8:5+flush-259:0	08:30:26	0
824163	99	38	33,4	cyclictest	839815	-21	latency_hist	07:25:01	0
824163	99	38	31,5	cyclictest	1063684	-21	ntpq	10:55:22	0
824167	99	37	32,3	cyclictest	1148662	-21	apt-get	12:20:12	1
824167	99	37	32,3	cyclictest	1002205	-21	kworker/u8:3+flush-259:0	10:20:14	1
824163	99	37	34,2	cyclictest	21	1	rcuc/0	09:35:01	0
824172	99	36	30,4	cyclictest	860957	-21	gpgv	07:45:02	2
824167	99	36	33,2	cyclictest	1053859	-21	kworker/u8:2+events_unbound	11:35:21	1
824167	99	35	28,5	cyclictest	1137790	-21	cp	12:10:00	1
824163	99	35	32,2	cyclictest	876758	-21	kworker/u8:3+flush-259:0	09:40:24	0
824167	99	34	29,4	cyclictest	960231	-21	/usr/sbin/munin	09:20:16	1
824167	99	34	29,3	cyclictest	887727	-21	kworker/u8:5+flush-259:0	09:00:22	1
824167	99	34	29,3	cyclictest	1122049	-21	/usr/sbin/munin	11:55:15	1
824167	99	34	26,5	cyclictest	850291	-21	cat	07:35:01	1
824163	99	34	30,3	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	11:10:23	0
824163	99	34	30,3	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	11:10:22	0
824163	99	34	28,5	cyclictest	1105045	-21	ntpq	11:35:21	0
824175	99	33	27,4	cyclictest	1153549	-21	latency_hist	12:25:01	3
824172	99	33	28,4	cyclictest	840047	-21	kworker/u8:0+flush-259:0	07:50:17	2
824167	99	33	30,2	cyclictest	1028201	-21	kworker/u8:1+events_unbound	11:45:02	1
824167	99	33	28,3	cyclictest	1116688	-21	kworker/u8:3+flush-259:0	12:00:26	1
824163	99	33	31,1	cyclictest	887727	-21	kworker/u8:5+events_unbound	09:00:11	0
824163	99	33	30,2	cyclictest	938949	-21	kworker/u8:0+flush-259:0	09:15:24	0
824163	99	33	29,3	cyclictest	1059677	-21	kworker/u8:0+events_unbound	11:00:16	0
824163	99	33	29,3	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	12:35:15	0
824172	99	32	28,3	cyclictest	882517	-21	kworker/u8:4+flush-259:0	08:10:20	2
824167	99	32	27,3	cyclictest	928917	-21	apt-get	08:50:14	1
824167	99	32	27,3	cyclictest	928917	-21	apt-get	08:50:13	1
824163	99	32	28,3	cyclictest	882517	-21	kworker/u8:4+flush-259:0	08:15:15	0
824175	99	31	25,4	cyclictest	1064598	-21	latency_hist	11:00:00	3
824172	99	31	27,3	cyclictest	986270	-21	kworker/u8:2+flush-259:0	10:10:21	2
824167	99	31	27,3	cyclictest	1002205	-21	kworker/u8:3+flush-259:0	10:05:26	1
824167	99	31	26,4	cyclictest	1106189	-21	apt-get	11:40:10	1
824163	99	31	28,2	cyclictest	1053859	-21	kworker/u8:2+flush-259:0	11:50:17	0
824163	99	31	28,2	cyclictest	1053859	-21	kworker/u8:2+flush-259:0	11:20:24	0
824163	99	31	28,2	cyclictest	1028201	-21	kworker/u8:1+events_unbound	11:25:18	0
824172	99	30	23,4	cyclictest	1007333	-21	latency_hist	10:05:02	2
824167	99	30	27,2	cyclictest	882517	-21	kworker/u8:4+events_unbound	08:30:15	1
824167	99	30	26,3	cyclictest	818794	-21	kworker/u8:2+events_unbound	07:10:13	1
824167	99	30	24,4	cyclictest	838890	-21	ntpq	07:20:21	1
824163	99	30	27,2	cyclictest	938949	-21	kworker/u8:0+events_unbound	09:10:22	0
824163	99	30	26,3	cyclictest	1153822	-21	apt-get	12:25:12	0
824172	99	29	25,3	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	12:15:22	2
824172	99	29	22,5	cyclictest	908476	-21	diskstats	08:30:14	2
824167	99	29	26,2	cyclictest	887727	-21	kworker/u8:5+events_unbound	08:20:25	1
824167	99	29	26,2	cyclictest	818794	-21	kworker/u8:2+events_unbound	07:40:15	1
824167	99	29	26,2	cyclictest	1002205	-21	kworker/u8:3+flush-259:0	10:40:15	1
824163	99	29	25,3	cyclictest	996695	-21	kworker/u8:0+flush-259:0	09:55:19	0
824175	99	28	24,3	cyclictest	850144	-21	gpgv	07:35:01	3
824167	99	28	25,2	cyclictest	882517	-21	kworker/u8:4+events_unbound	08:15:18	1
824167	99	28	25,2	cyclictest	819005	-21	kworker/u8:3+events_unbound	07:10:01	1
824167	99	28	24,3	cyclictest	949256	-21	kworker/u8:1+flush-259:0	09:10:17	1
824167	99	28	22,4	cyclictest	252	-21	systemd-journal	09:49:34	1
824167	99	28	22,4	cyclictest	1080333	-21	/usr/sbin/munin	11:15:15	1
824163	99	28	26,2	cyclictest	819005	-21	kworker/u8:3+flush-259:0	07:34:13	0
824163	99	28	25,2	cyclictest	1053859	-21	kworker/u8:2+events_unbound	11:55:19	0
824175	99	27	24,2	cyclictest	1111174	-21	gpgv	11:45:01	3
824175	99	27	23,3	cyclictest	938949	-21	kworker/u8:0+flush-259:0	09:25:17	3
824172	99	27	21,4	cyclictest	923775	-21	/usr/sbin/munin	08:45:24	2
824172	99	27	21,4	cyclictest	923775	-21	/usr/sbin/munin	08:45:23	2
824172	99	27	21,4	cyclictest	866400	-21	apt-get	07:50:00	2
824172	99	27	20,5	cyclictest	902056	-21	ntpq	08:20:21	2
824172	99	27	1,25	cyclictest	1	-21	systemd	09:20:00	2
824167	99	27	24,2	cyclictest	882517	-21	kworker/u8:4+flush-259:0	08:10:15	1
824167	99	27	24,2	cyclictest	1002205	-21	kworker/u8:3+flush-259:0	10:25:25	1
824167	99	27	23,3	cyclictest	938949	-21	kworker/u8:0+events_unbound	09:25:23	1
824167	99	27	23,3	cyclictest	1090681	-21	apt-get	11:25:11	1
824163	99	27	24,2	cyclictest	887727	-21	kworker/u8:5+flush-259:0	08:35:15	0
824163	99	27	24,2	cyclictest	887727	-21	kworker/u8:5+events_unbound	08:20:16	0
824163	99	27	24,2	cyclictest	818794	-21	kworker/u8:2+flush-259:0	08:00:24	0
824163	99	27	22,4	cyclictest	1059445	-21	turbostat	10:54:59	0
824163	99	27	22,3	cyclictest	1100731	-21	latency_hist	11:35:01	0
824175	99	26	20,4	cyclictest	509	-21	rs:main		3
824175	99	26	19,5	cyclictest	818794	-21	kworker/u8:2+flush-259:0	08:05:18	3
824167	99	26	21,4	cyclictest	985318	-21	ntpq	09:40:21	1
824163	99	26	23,2	cyclictest	986270	-21	kworker/u8:2+flush-259:0	10:10:20	0
824163	99	26	23,2	cyclictest	876758	-21	kworker/u8:3+flush-259:0	08:55:15	0
824163	99	26	23,2	cyclictest	819005	-21	kworker/u8:3+flush-259:0	07:15:00	0
824163	99	26	23,2	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	12:30:15	0
824172	99	25	22,2	cyclictest	509	-21	rs:main		2
824172	99	25	20,4	cyclictest	876758	-21	kworker/u8:3+flush-259:0	08:40:26	2
824172	99	25	20,4	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	10:45:24	2
824167	99	25	23,1	cyclictest	840047	-21	kworker/u8:0+events_unbound	07:50:16	1
824167	99	25	22,2	cyclictest	876758	-21	kworker/u8:3+events_unbound	09:05:24	1
824167	99	25	22,2	cyclictest	840047	-21	kworker/u8:0+events_unbound	07:45:13	1
824167	99	25	22,2	cyclictest	1028201	-21	kworker/u8:1+flush-259:0	12:35:25	1
824167	99	25	21,3	cyclictest	876758	-21	kworker/u8:3+events_unbound	08:05:23	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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