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2026-01-02 - 07:23

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 all highest latencies:
System rack5slot7s.osadl.org (updated Fri Jan 02, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1241224312180,95sleep00-21swapper19:07:340
15599916316,121cyclictest32387-21munin-run22:20:020
15599916212,23cyclictest25733-21munin-plugin-st21:40:010
15599916020,26cyclictest15722-21apt-get23:55:210
15599915918,118cyclictest12919-21munin-run20:20:030
15599915814,120cyclictest2830-21munin-run19:20:020
15599915716,117cyclictest22527-21apt21:20:010
15599915615,117cyclictest289-21snmpd23:23:100
15599915512,44cyclictest16855-21grep20:41:020
1559991549,100cyclictest10596-21apt-get23:26:440
15599915418,109cyclictest5337-21apt-get19:35:190
15599915322,32cyclictest0-21swapper21:45:120
15599915316,22cyclictest8610-21apt-get19:55:270
15599915315,115cyclictest16072-21users20:36:100
15599915314,26cyclictest20406-21head00:21:050
15599915312,26cyclictest4740-21modprobe22:50:010
15599915312,24cyclictest20977-21grep00:25:560
1559991529,119cyclictest843-21/usr/sbin/munin22:26:090
15599915217,108cyclictest30716-21apt-get22:10:310
15599915215,25cyclictest2338-21munin-run22:35:020
1559991519,120cyclictest13289-21sort20:20:530
15599915122,101cyclictest15580-21users23:51:040
15599915120,31cyclictest13942-21diskstats20:25:370
15599915118,104cyclictest29856-21apt-get22:05:210
15599915117,111cyclictest2552-21diskstats22:35:330
15599915115,37cyclictest29343-21grep22:00:470
15599915113,114cyclictest8922-21apt-get23:15:240
15599915113,113cyclictest28749-21sort21:56:000
15599915112,24cyclictest8277-21ls19:51:120
15599915110,123cyclictest8746-1kworker/u3:023:30:150
1559991509,117cyclictest7510-21cat23:05:480
15599915028,102cyclictest18934-21apt-get00:15:120
15599915014,38cyclictest18034-21munin-run00:10:000
15599915010,27cyclictest22797-21if_eth021:20:360
15599915010,118cyclictest5412-21sort22:51:020
15599915010,116cyclictest21450-21find21:10:560
15599914913,26cyclictest17175-21head00:01:030
15599914913,111cyclictest463-21zcat22:20:550
15599914913,111cyclictest23868-21/usr/sbin/munin21:25:570
15599914911,116cyclictest20198-21cat21:05:040
15599914910,27cyclictest13542-21cat23:40:400
15599914910,110cyclictest14353-21cat23:45:430
15599914818,26cyclictest8289-21memory23:10:430
15599914816,35cyclictest11873-21munin-run20:15:010
15599914815,39cyclictest3369-21df_inode22:40:300
15599914814,108cyclictest6159-21/usr/sbin/munin19:40:210
15599914813,26cyclictest10207-21sshd20:01:090
15599914810,43cyclictest21843-21cut00:31:000
15599914727,20cyclictest6323-21cron23:00:010
15599914726,99cyclictest0-21swapper00:10:240
15599914720,100cyclictest4543-21apt-get19:30:200
15599914716,23cyclictest20344-21df_inode21:05:310
15599914715,31cyclictest6463-21munin-node23:00:110
15599914713,29cyclictest6954-21/usr/sbin/munin19:46:020
15599914711,25cyclictest14622-21/usr/sbin/munin20:30:560
15599914710,35cyclictest22404-21missed_timers00:35:480
15599914617,23cyclictest17273-21memory20:45:420
15599914616,105cyclictest24242-21apt-get21:30:170
15599914615,22cyclictest12625-21diskstats23:35:320
15599914610,24cyclictest3199-21grep19:20:450
15599914540,86cyclictest10996-21unixbench_singl20:06:030
15599914512,48cyclictest18935-21ntpq20:55:510
15599914510,26cyclictest28087-21grep21:51:030
15599914415,105cyclictest26029-21irqstats21:40:410
15599914413,23cyclictest18131-21grep20:50:470
15599914315,26cyclictest3859-21diskstats19:25:310
15599914215,101cyclictest1896-21memory19:10:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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