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 50 highest latencies:

System rackeslot4s.osadl.org (updated Mon Mar 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
995774	99	42	35,5	cyclictest	1176965	-21	cp	10:05:00	2
995770	99	42	38,3	cyclictest	1182464	-21	kworker/u8:3+flush-259:0	10:20:15	1
995770	99	39	36,2	cyclictest	1244222	-21	kworker/u8:1+events_unbound	11:40:23	1
995768	99	39	33,4	cyclictest	1125567	-21	/usr/sbin/munin	09:15:24	0
995770	99	38	35,2	cyclictest	1249566	-21	kworker/u8:0+flush-259:0	11:15:16	1
995770	99	38	35,2	cyclictest	1182464	-21	kworker/u8:3+flush-259:0	10:15:16	1
995778	99	37	33,3	cyclictest	1182464	-21	kworker/u8:3+flush-259:0	10:20:18	3
995770	99	37	33,3	cyclictest	1275198	-21	kworker/u8:2+events_unbound	12:30:17	1
995770	99	36	33,2	cyclictest	1073863	-21	kworker/u8:2+events_unbound	09:00:17	1
995778	99	35	31,2	cyclictest	1005997	-21	kworker/u8:0+events_unbound	08:15:20	3
995770	99	35	32,2	cyclictest	990645	-21	kworker/u8:2+events_unbound	07:30:19	1
995770	99	35	31,3	cyclictest	1073863	-21	kworker/u8:2+flush-259:0	09:05:24	1
995770	99	35	31,2	cyclictest	1203002	-21	kworker/u8:0+flush-259:0	10:35:20	1
995770	99	35	30,3	cyclictest	1037466	-21	kworker/u8:1+flush-259:0	08:15:21	1
995768	99	35	29,4	cyclictest	1073863	-21	kworker/u8:2+flush-259:0	09:10:16	0
995778	99	34	30,2	cyclictest	1275198	-21	kworker/u8:2+flush-259:0	12:15:17	3
995778	99	34	29,3	cyclictest	1048347	-21	/usr/sbin/munin	08:00:14	3
995774	99	34	31,2	cyclictest	1322034	-21	kworker/u8:0+flush-259:0	12:35:27	2
995770	99	34	31,2	cyclictest	1182464	-21	kworker/u8:3+flush-259:0	10:25:22	1
995770	99	34	31,2	cyclictest	1073863	-21	kworker/u8:2+events_unbound	10:50:23	1
995770	99	34	30,3	cyclictest	1005997	-21	kworker/u8:0+events_unbound	07:50:14	1
995770	99	34	28,4	cyclictest	252	-21	systemd-journal	09:43:25	1
995778	99	33	27,4	cyclictest	1327601	-21	diskstats	12:30:14	3
995770	99	33	29,3	cyclictest	1275198	-21	kworker/u8:2+flush-259:0	11:50:15	1
995770	99	33	28,3	cyclictest	1228726	-21	kworker/u8:3+events_unbound	11:00:12	1
995770	99	32	29,2	cyclictest	1255128	-21	kworker/u8:4+events_unbound	11:20:24	1
995770	99	32	28,2	cyclictest	1073863	-21	kworker/u8:2+events_unbound	09:50:19	1
995770	99	32	27,3	cyclictest	1182464	-21	kworker/u8:3+flush-259:0	10:30:15	1
995770	99	31	28,2	cyclictest	1005997	-21	kworker/u8:0+flush-259:0	09:55:11	1
995770	99	31	27,3	cyclictest	990645	-21	kworker/u8:2+events_unbound	07:35:19	1
995778	99	30	27,2	cyclictest	1203002	-21	kworker/u8:0+events_unbound	10:55:25	3
995778	99	30	26,3	cyclictest	1151299	-21	kworker/u8:4+flush-259:0	09:40:24	3
995778	99	30	26,2	cyclictest	1203002	-21	kworker/u8:0+flush-259:0	10:40:16	3
995778	99	30	24,4	cyclictest	1317091	-21	/usr/sbin/munin	12:20:12	3
995770	99	30	27,2	cyclictest	1005997	-21	kworker/u8:0+flush-259:0	09:45:24	1
995770	99	30	26,3	cyclictest	1275198	-21	kworker/u8:2+flush-259:0	12:20:20	1
995770	99	30	26,3	cyclictest	1079232	-21	kworker/u8:4+events_unbound	08:50:23	1
995770	99	30	26,3	cyclictest	1073863	-21	kworker/u8:2+events_unbound	10:05:18	1
995770	99	29	26,2	cyclictest	957719	-21	kworker/u8:1+flush-259:0	07:10:24	1
995768	99	29	0,27	cyclictest	1	-21	systemd	07:50:00	0
995770	99	28	24,3	cyclictest	1275198	-21	kworker/u8:2+events_unbound	11:55:16	1
995778	99	27	23,3	cyclictest	1275277	-21	gpgv	11:40:01	3
995770	99	27	23,3	cyclictest	1275198	-21	kworker/u8:2+flush-259:0	12:25:21	1
995770	99	27	23,3	cyclictest	1275198	-21	kworker/u8:2+flush-259:0	12:15:24	1
995770	99	27	23,3	cyclictest	1005997	-21	kworker/u8:0+events_unbound	08:20:12	1
995770	99	27	22,3	cyclictest	1275198	-21	kworker/u8:2+events_unbound	12:00:18	1
995768	99	27	21,4	cyclictest	1218420	-21	latency_hist	10:45:01	0
995778	99	26	20,4	cyclictest	1275674	-21	base64	11:40:01	3
995774	99	26	21,4	cyclictest	1182464	-21	kworker/u8:3+flush-259:0	10:30:00	2
995770	99	26	23,2	cyclictest	1005997	-21	kworker/u8:0+events_unbound	10:00:17	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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