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2026-04-28 - 14:52

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 highest latencies:
System rack5slot7s.osadl.org (updated Tue Apr 28, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
938224322200,89sleep00-21swapper19:09:550
9909916714,127cyclictest6056-21head19:36:020
9909916412,128cyclictest14322-21grep23:45:490
9909916235,110cyclictest12721-21tr23:35:500
990991609,37cyclictest26453-21apt-get21:46:460
9909915916,117cyclictest26453-21apt-get21:45:020
9909915911,124cyclictest30020-21grep22:01:030
9909915813,120cyclictest18736-21apt-get00:16:360
9909915643,92cyclictest3329-21latency_hist22:40:060
9909915643,22cyclictest726-21timerandwakeup22:21:000
9909915619,38cyclictest3746-21apt19:25:010
9909915615,23cyclictest13347-21df_inode23:40:270
9909915612,120cyclictest30194-21/usr/sbin/munin22:05:100
9909915612,120cyclictest13084-21irqstats20:20:370
9909915610,25cyclictest16317-21modprobe00:00:000
9909915529,20cyclictest0-21swapper00:25:000
9909915513,118cyclictest18284-21memory00:10:440
9909915512,26cyclictest5656-21apt-get22:56:040
9909915510,118cyclictest12784-21systemd-journal22:45:000
9909915420,27cyclictest22550-21apt-get21:20:210
9909915418,108cyclictest24937-21apt-get21:35:180
9909915416,116cyclictest23586-21memory21:25:430
9909915415,114cyclictest11238-21awk23:25:550
9909915414,115cyclictest22579-21awk00:35:490
9909915414,112cyclictest8077-21munin-node19:50:120
9909915317,113cyclictest27477-21apt-get21:51:220
9909915313,117cyclictest11770-21cut20:11:000
9909915312,117cyclictest272-21snmpd23:15:470
9909915312,116cyclictest15990-21sh20:40:010
9909915311,119cyclictest272-21snmpd00:30:550
9909915235,24cyclictest4962-21/usr/sbin/munin22:50:120
9909915222,27cyclictest11621-21apt-get23:30:180
9909915216,21cyclictest32500-21munin-run22:20:020
9909915213,116cyclictest24511-21ps21:30:540
9909915212,23cyclictest2448-21latency_hist22:35:000
9909915212,116cyclictest16425-21awk20:40:500
9909915140,23cyclictest31023-21cpu22:10:210
9909915120,102cyclictest14833-21apt-get23:50:190
9909915117,29cyclictest28684-21df_inode21:55:360
9909915117,113cyclictest1781-21munin-run19:15:020
9909915114,114cyclictest22430-21munin-run21:20:030
9909915111,26cyclictest14173-21mailstats20:25:590
9909915034,95cyclictest4313-21mailstats19:25:570
9909915020,104cyclictest2329-21diskstats19:15:480
9909915018,102cyclictest20122-21apt-get21:05:210
9909915016,24cyclictest9937-21memory20:00:450
9909915016,111cyclictest19746-21grep21:00:520
9909915015,20cyclictest6951-21apt-get19:46:070
9909915014,116cyclictest16565-21diskstats00:00:350
9909915013,23cyclictest8871-21apt19:55:120
9909915011,116cyclictest7445-21head23:01:110
9909915010,24cyclictest12774-21cron20:20:000
9909914817,108cyclictest6432-21irqstats19:40:410
9909914811,113cyclictest272-21snmpd19:30:470
990991479,117cyclictest8832-21find23:10:560
990991479,112cyclictest1055-21cstates22:25:220
9909914711,114cyclictest21336-21zcat21:10:560
9909914620,26cyclictest20795-21df00:25:280
9909914614,37cyclictest17888-21sed00:06:030
9909914518,26cyclictest17025-21diskstats20:45:360
9909914515,24cyclictest10129-21df23:20:240
9909914514,91cyclictest454-21sendmail-mta23:05:150
9909914512,107cyclictest18602-21/usr/sbin/munin20:55:240
990991449,114cyclictest24939-21kworker/u2:322:45:160
9909914419,27cyclictest14502-21apt-get20:30:200
9909914419,25cyclictest10594-21df_inode20:05:310
9909914415,24cyclictest18366-21users20:51:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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