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2025-11-28 - 08:09

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 Fri Nov 28, 2025 00:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27836224312203,86sleep00-21swapper19:08:060
280969916115,119cyclictest31805-21awk22:46:570
280969916113,28cyclictest513-21rt-features19:35:560
280969916112,123cyclictest9639-21apt-get20:36:370
280969916014,122cyclictest29430-21df_inode19:15:430
280969915913,122cyclictest470-21latency_hist22:55:080
280969915815,101cyclictest8261-21diskstats20:25:350
280969915813,121cyclictest23658-21/usr/sbin/munin22:00:410
280969915717,115cyclictest24358-21apt-get22:05:360
280969915711,44cyclictest20812-21grep21:40:560
280969915711,122cyclictest9816-21apt-get23:50:220
280969915617,115cyclictest16692-21memory00:31:260
280969915614,27cyclictest4759-21head20:01:020
280969915610,121cyclictest14740-21sort21:05:030
280969915512,120cyclictest26183-21munin-run22:15:000
280969915417,113cyclictest5473-21apt-get23:26:030
280969915416,114cyclictest17021-21head21:16:040
280969915314,99cyclictest13722-21munin-plugin-st00:15:000
280969915314,116cyclictest14539-21systemctl00:20:010
280969915313,117cyclictest4932-21apt-get20:05:140
28096991529,119cyclictest7462-21cstates23:35:210
280969915230,21cyclictest22949-21diskstats21:55:330
280969915216,23cyclictest19247-21/usr/sbin/munin21:31:030
280969915214,25cyclictest17235-21apt-get21:20:220
280969915212,116cyclictest8920-21munin-run23:45:020
280969915212,114cyclictest27174-21/usr/sbin/munin22:20:210
280969915211,115cyclictest7777-21fgrep20:20:580
28096991519,117cyclictest4400-21cut23:15:570
280969915119,22cyclictest0-21swapper19:30:480
280969915117,23cyclictest29825-21grep22:35:510
280969915117,113cyclictest28903-21munin-node19:15:040
280969915115,113cyclictest9714-21apt23:50:000
280969915114,110cyclictest3309-21/usr/sbin/munin19:55:550
280969915113,115cyclictest30158-21/usr/sbin/munin19:20:560
280969915018,29cyclictest9641-21munin-run20:35:040
280969915018,28cyclictest6776-21irqstats23:30:470
280969915017,25cyclictest31060-21grep22:45:050
280969915016,28cyclictest14757-21df00:20:270
280969915016,107cyclictest14809-21apt-get21:05:240
280969915015,25cyclictest11595-21apt-get20:45:140
280969915014,36cyclictest30955-21apt19:25:130
280969915014,24cyclictest16224-21cat00:30:070
28096991499,117cyclictest10610-21/usr/sbin/munin23:55:550
280969914932,20cyclictest21655-21awk21:45:540
280969914912,42cyclictest26989-21cron22:20:010
280969914912,26cyclictest2352-21apt-get23:05:210
280969914912,114cyclictest18756-21wc21:30:040
280969914911,22cyclictest28182-21cat22:25:470
280969914833,95cyclictest11874-21mailstats00:01:010
280969914833,22cyclictest3844-21munin-plugin-st23:15:000
280969914820,22cyclictest29335-21head22:31:040
280969914816,110cyclictest1886-21irqstats19:45:370
280969914813,24cyclictest5485-21cat23:25:040
280969914813,23cyclictest1757-21latency23:00:480
280969914812,27cyclictest19985-21ps21:35:570
280969914812,117cyclictest392-21apt-get22:56:270
280969914736,91cyclictest12826-21sendmail_mailst20:51:030
280969914721,24cyclictest16260-21users21:11:060
280969914712,109cyclictest22216-21/usr/sbin/munin21:50:420
280969914711,25cyclictest6648-21/usr/sbin/munin20:15:360
280969914620,28cyclictest17385-21diskstats00:35:390
280969914517,25cyclictest13289-21df20:55:270
280969914516,25cyclictest5836-21diskstats20:10:330
280969914513,106cyclictest2509-21/usr/sbin/munin19:50:250
280969914511,112cyclictest12229-21/usr/sbin/munin00:05:530
280969914419,106cyclictest2515-1kworker/u3:120:40:160
280969914416,23cyclictest915-21/usr/sbin/munin19:40:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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