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2026-04-12 - 08:32

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 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 highest latencies:
System rack5slot7s.osadl.org (updated Sun Apr 12, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32252224312196,92sleep00-21swapper19:08:040
325149916514,123cyclictest2928-21apt-get22:40:170
325149916212,29cyclictest14378-21/usr/sbin/munin23:50:370
325149916017,114cyclictest18383-21apt-get00:15:180
325149916014,121cyclictest20901-21users00:27:070
325149915919,39cyclictest18741-21munin-run21:00:010
325149915918,116cyclictest16240-21memory00:00:460
325149915916,118cyclictest14241-21users23:46:040
325149915912,101cyclictest7620-21apt-get23:11:490
325149915810,122cyclictest10472-21apt-get20:11:490
32514991578,124cyclictest5198-21modprobe19:40:020
325149915715,118cyclictest25974-21apt-get21:46:280
325149915714,27cyclictest8012-21/usr/sbin/munin19:57:080
325149915616,101cyclictest367-21users22:21:070
325149915517,36cyclictest4377-21users22:46:060
325149915515,25cyclictest21728-21apt00:35:000
325149915511,120cyclictest23667-21/usr/sbin/munin21:30:110
325149915511,118cyclictest28597-21munin-run22:00:010
325149915419,28cyclictest11968-21apt-get23:35:160
325149915418,107cyclictest14030-21apt-get20:30:230
325149915416,38cyclictest2003-21munin-run22:35:000
325149915416,28cyclictest2233-21diskstats19:20:320
325149915416,24cyclictest30208-21munin-run22:10:010
325149915416,23cyclictest31204-21users22:12:070
325149915414,116cyclictest15875-21munin-run00:00:020
325149915330,19cyclictest0-21swapper19:41:000
325149915318,93cyclictest11280-21df_inode23:30:300
325149915315,26cyclictest3710-21/usr/sbin/munin19:30:280
325149915315,23cyclictest29015-21tr22:00:470
325149915314,25cyclictest7823-21awk19:52:060
325149915314,115cyclictest9650-21wc23:20:220
325149915310,118cyclictest17930-21modprobe20:55:020
325149915236,93cyclictest23586-21latency_hist21:30:040
325149915236,22cyclictest18191-21/usr/sbin/munin00:11:010
325149915222,102cyclictest16560-21diskstats20:45:360
325149915220,105cyclictest10379-21apt-get23:25:200
325149915216,113cyclictest14953-21fw_packets20:35:350
325149915214,115cyclictest22531-21munin-run00:40:020
325149915213,114cyclictest12788-21/usr/sbin/munin23:40:220
325149915121,102cyclictest1286-21apt-get19:15:370
325149915114,24cyclictest20310-21users21:06:060
325149915114,113cyclictest2800-21apt22:40:010
325149915113,47cyclictest809-21users19:11:030
325149915113,30cyclictest3231-21ntpq19:25:510
325149915110,24cyclictest12311-21apt20:20:010
325149915036,93cyclictest21443-21kernelversion21:15:430
325149915032,22cyclictest17485-21munin-plugin-st00:10:010
325149915015,21cyclictest19909-21munin-run00:25:040
325149915014,112cyclictest7614-21modprobe23:10:010
32514991498,119cyclictest25976-21munin-run21:45:060
325149914919,27cyclictest9098-21diskstats20:00:410
32514991489,116cyclictest22781-21grep21:25:030
325149914818,105cyclictest13474-21memory20:25:450
325149914815,22cyclictest6829-21munin-run23:05:010
325149914814,36cyclictest6226-21df19:45:260
325149914814,110cyclictest20562-21diskstats21:10:340
325149914813,110cyclictest10474-21munin-run20:10:040
325149914725,103cyclictest8754-21apt-get23:15:190
325149914717,108cyclictest24588-21fw_packets21:35:350
325149914715,24cyclictest4517-21apt-get22:50:190
325149914715,22cyclictest13129-21/usr/sbin/munin20:25:030
325149914715,104cyclictest31342-21apt-get22:15:270
325149914513,110cyclictest878-21wc22:25:520
325149914513,106cyclictest18861-21/usr/sbin/munin21:00:570
325149914510,27cyclictest27209-21df_inode21:50:340
325149914510,26cyclictest15652-21apt-get20:40:130
325149914414,23cyclictest6013-21munin-run23:00:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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