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2026-09-04 - 17:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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: 50.5 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 792 highest latencies:
System rack5slot7s.osadl.org (updated Fri Sep 04, 2026 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23149224382197,96sleep00-21swapper07:08:490
233269916041,24cyclictest32091-21df11:20:280
233269915814,120cyclictest13969-21munin-run09:30:010
233269915741,93cyclictest17612-21df_inode09:50:300
233269915714,26cyclictest30255-21apt11:10:010
233269915711,23cyclictest17076-21grep09:46:000
233269915618,114cyclictest30527-21diskstats07:50:340
233269915615,23cyclictest18413-21diskstats09:55:340
233269915613,119cyclictest28368-21wc10:55:560
233269915522,30cyclictest5335-21diskstats08:35:350
233269915517,96cyclictest1818-21apt-get11:36:100
233269915517,113cyclictest15564-21apt-get09:41:040
233269915517,109cyclictest26979-21apt-get07:30:180
233269915516,114cyclictest22347-21apt-get10:20:190
233269915511,119cyclictest4855-21find08:30:560
233269915417,38cyclictest22227-21munin-run10:20:020
233269915416,54cyclictest27673-21apt-get07:36:260
233269915416,23cyclictest4460-21apt-get11:50:380
233269915415,98cyclictest10786-21grep12:25:550
233269915412,21cyclictest7882-21cron12:10:000
233269915412,117cyclictest12365-21sendmail09:20:020
233269915319,108cyclictest1959-21apt-get08:15:160
233269915314,22cyclictest31869-21munin-run11:20:020
233269915234,87cyclictest3584-21unixbench_singl11:41:110
233269915217,105cyclictest318-21apt-get11:25:180
233269915216,24cyclictest28829-21apt-get07:40:240
233269915214,114cyclictest3767-21/usr/sbin/munin11:45:100
233269915212,40cyclictest11910-21apt-get12:36:500
233269915211,40cyclictest15564-21apt-get09:40:040
233269915210,25cyclictest25451-21cstates07:20:220
233269915115,24cyclictest5689-21df_inode11:55:360
233269915114,36cyclictest24133-21munin-node07:15:050
233269915114,25cyclictest909-21/usr/sbin/munin08:06:010
233269915114,113cyclictest6910-21wc08:45:210
233269915113,99cyclictest10520-21awk09:05:580
233269915111,116cyclictest1820-21munin-run11:35:000
233269915110,117cyclictest28876-21sshd11:00:340
233269915030,21cyclictest0-21swapper09:30:430
233269915013,113cyclictest23139-21/usr/sbin/munin10:25:570
233269915013,111cyclictest12586-21/usr/sbin/munin09:20:320
233269915011,39cyclictest24628-21kworker/u2:310:34:590
233269914931,19cyclictest0-21swapper11:10:540
233269914918,110cyclictest11912-21/usr/sbin/munin12:35:050
233269914917,26cyclictest6048-21apt-get08:40:170
233269914914,94cyclictest31721-21wc07:55:560
233269914914,94cyclictest25045-21grep10:35:500
233269914913,22cyclictest20717-21apt-get10:10:220
233269914913,110cyclictest26890-21/usr/sbin/munin10:45:590
23326991489,114cyclictest25269-21systemctl07:20:020
233269914820,100cyclictest3635-21apt-get08:25:210
233269914817,25cyclictest1164-21apt-get08:10:190
233269914813,109cyclictest7635-21/usr/sbin/munin08:50:490
233269914812,111cyclictest27354-21grep10:50:450
233269914728,32cyclictest2949-21diskstats08:20:330
233269914726,22cyclictest0-21swapper08:00:340
233269914717,27cyclictest20379-21mailstats10:05:550
233269914717,105cyclictest8100-21df_inode12:10:270
233269914714,109cyclictest26870-21modprobe07:30:010
233269914714,108cyclictest9918-21ntp_kernel_pll_12:20:490
233269914711,23cyclictest9217-21sendmail_mailqu12:15:560
233269914618,27cyclictest7060-21users12:01:070
233269914613,21cyclictest9137-21munin-run09:00:020
233269914611,112cyclictest11211-21grep09:10:520
233269914611,108cyclictest9949-21latency_hist09:05:040
233269914520,26cyclictest29620-21/usr/sbin/munin07:45:550
233269914511,110cyclictest19765-21grep10:01:030
233269914310,24cyclictest26234-21sshd10:42:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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