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2026-10-27 - 03:03

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 100 highest latencies:
System rack5slot7s.osadl.org (updated Tue Oct 27, 2026 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9982224242185,97sleep00-21swapper19:07:400
102889916616,25cyclictest20172-21apt23:20:010
102889916317,120cyclictest12229-21munin-run19:20:030
102889916117,100cyclictest12804-21apt-get19:22:030
102889916113,104cyclictest15920-21apt-get22:56:060
102889916017,118cyclictest16769-21apt-get19:46:380
102889915916,119cyclictest30253-21apt-get21:06:160
102889915711,121cyclictest23030-21modprobe20:20:020
102889915530,18cyclictest0-21swapper23:55:120
102889915519,108cyclictest12816-21apt-get22:35:200
102889915514,24cyclictest4556-21/usr/sbin/munin21:45:400
102889915514,118cyclictest15718-21apt-get19:41:150
102889915422,28cyclictest15131-21diskstats19:35:320
102889915421,24cyclictest17772-21apt-get19:51:120
102889915421,106cyclictest4077-21ntp_states21:40:490
102889915420,106cyclictest15339-21diskstats22:50:330
102889915322,103cyclictest21888-21apt-get23:30:230
102889915310,26cyclictest425-21apt21:20:020
102889915244,86cyclictest26403-21/usr/sbin/munin20:40:230
102889915233,100cyclictest10400-21gpgv22:20:340
102889915227,16cyclictest0-21swapper00:06:010
102889915217,109cyclictest25196-21df23:50:240
102889915216,112cyclictest6851-21munin-run22:00:020
102889915215,113cyclictest12712-21sh22:35:000
102889915214,39cyclictest10068-21apt22:20:020
102889915212,117cyclictest564-21munin-run00:40:020
102889915211,27cyclictest27759-21unixbench_singl20:46:010
102889915122,28cyclictest1350-21apt-get21:25:210
102889915115,23cyclictest18156-21ntpq23:05:500
102889915113,22cyclictest32077-21munin-run21:15:010
102889915112,116cyclictest23837-21apt20:25:010
102889915111,26cyclictest14859-21wc22:45:560
10288991509,26cyclictest18914-21cat23:10:470
102889915022,27cyclictest29560-21apt-get21:00:210
102889915020,27cyclictest19867-21irqstats20:00:420
102889915019,104cyclictest13638-21apt-get22:40:190
102889915014,24cyclictest32178-21users00:31:060
102889915014,22cyclictest19643-21sort20:00:060
102889914929,98cyclictest2776-21sed21:31:030
102889914917,27cyclictest29434-21latency_hist21:00:050
102889914915,107cyclictest21457-21irqstats20:10:410
102889914915,104cyclictest14299-21/usr/sbin/munin19:30:240
102889914912,25cyclictest28937-21unixbench_singl00:11:060
102889914911,99cyclictest21057-21cat23:25:050
102889914911,27cyclictest10954-21timerwakeupswit19:11:010
102889914910,26cyclictest11231-21sshd22:25:180
102889914820,101cyclictest8423-21users22:06:050
102889914817,109cyclictest29814-21munin-run00:20:030
102889914813,112cyclictest30840-21diskstats00:25:330
102889914813,110cyclictest8994-21fgrep22:10:570
102889914812,26cyclictest28305-21grep20:50:550
102889914810,115cyclictest24135-21grep23:41:030
102889914717,26cyclictest17367-21/usr/sbin/munin23:00:560
102889914717,109cyclictest30690-21cat00:25:040
102889914714,105cyclictest21092-21/usr/sbin/munin23:25:560
102889914712,21cyclictest25369-21unixbench_singl20:31:040
10288991469,114cyclictest16882-21snmpd20:25:470
102889914616,107cyclictest3183-21memory21:35:450
102889914615,47cyclictest7670-21munin-run22:05:020
102889914614,111cyclictest6076-21cat21:55:030
102889914612,24cyclictest13921-21mailstats19:26:080
102889914611,27cyclictest27474-21wc00:05:040
102889914611,115cyclictest23109-21sendmail_mailqu23:35:550
102889914610,23cyclictest25995-21awk20:35:590
102889914518,103cyclictest24407-21df_inode23:45:290
102889914513,109cyclictest20858-21proc_pri20:05:570
102889914510,22cyclictest980-21sendmail_mailqu21:20:560
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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