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2026-05-12 - 23:40

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 100 highest latencies:
System rack5slot7s.osadl.org (updated Tue May 12, 2026 12:45:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2089224422200,97sleep00-21swapper07:06:580
24739916630,113cyclictest22942-21apt-get12:25:110
24739916115,124cyclictest5276-21munin-run10:40:030
24739916110,125cyclictest13161-21ntpq11:25:520
24739916013,122cyclictest17758-21cron11:55:010
24739915816,26cyclictest20983-21munin-run12:15:000
24739915732,22cyclictest18401-21latency_hist08:45:050
24739915718,24cyclictest9774-21memory07:51:200
24739915718,115cyclictest25924-21apt-get09:30:280
2473991559,23cyclictest20041-21sort12:06:030
24739915512,116cyclictest30272-21munin-run09:55:030
24739915418,32cyclictest18806-21diskstats12:00:340
24739915416,113cyclictest18839-21wc08:45:560
24739915416,112cyclictest27706-21/usr/sbin/munin09:40:540
24739915415,27cyclictest21517-21/usr/sbin/munin09:00:590
24739915414,25cyclictest20981-21apt-get12:16:280
24739915414,24cyclictest20131-21apt08:55:010
24739915414,117cyclictest13698-21apt-get11:30:280
24739915413,117cyclictest24844-21cat09:21:010
24739915412,42cyclictest11104-21cron11:15:000
2473991539,118cyclictest30270-21apt-get09:56:380
24739915318,108cyclictest2186-21apt-get10:20:180
24739915317,27cyclictest8184-21systemctl07:40:580
24739915317,24cyclictest7623-21munin-run07:40:030
24739915316,98cyclictest9234-21/usr/sbin/munin07:50:050
24739915313,23cyclictest16141-21users11:41:060
24739915311,119cyclictest14162-21sort08:16:030
24739915311,117cyclictest1530-21uname10:15:420
24739915216,25cyclictest28401-21apt-get09:45:350
24739915216,24cyclictest20934-21munin-run09:00:030
24739915214,115cyclictest6259-21apt-get10:45:270
24739915213,40cyclictest6092-21munin-run10:45:050
24739915213,115cyclictest8709-21munin-plugin-st11:00:010
24739915212,99cyclictest3265-21/usr/sbin/munin07:15:040
24739915210,117cyclictest6490-21ps07:30:560
24739915119,29cyclictest667-21diskstats10:10:330
24739915118,108cyclictest23437-21apt-get09:15:180
24739915116,115cyclictest10739-21processes07:56:000
24739915021,26cyclictest22643-21apt-get09:10:170
24739915017,26cyclictest3779-21apt-get10:30:170
24739915013,96cyclictest12733-21modprobe11:25:010
24739915012,25cyclictest7397-21kernelversion10:50:490
24739915010,114cyclictest3560-21grep07:15:170
2473991499,27cyclictest16687-21cron08:35:020
24739914926,104cyclictest25355-21grep09:25:490
24739914919,20cyclictest0-21swapper08:05:370
24739914912,98cyclictest11338-21/usr/sbin/munin11:15:360
24739914912,61cyclictest14269-21kworker/u2:711:35:180
24739914911,114cyclictest5755-21find07:25:590
24739914836,90cyclictest32096-21awk10:01:160
24739914820,102cyclictest23735-21apt-get12:30:160
24739914819,105cyclictest25231-21munin-run12:40:020
24739914817,23cyclictest16938-21users11:46:060
24739914817,105cyclictest14503-21df_inode08:20:270
24739914815,110cyclictest13468-21munin-run08:15:010
24739914812,37cyclictest10314-21modprobe11:10:000
24739914812,112cyclictest11822-21sed08:01:050
24739914717,26cyclictest8828-21/usr/sbin/munin11:00:370
24739914715,23cyclictest22504-21users09:06:050
24739914712,24cyclictest5231-21munin-run07:25:010
24739914712,114cyclictest21659-1kworker/u3:412:20:140
24739914711,22cyclictest15535-21open_inodes08:25:520
24739914630,21cyclictest0-21swapper11:55:430
24739914611,111cyclictest27188-21tr09:35:550
24739914610,22cyclictest17494-21munin-run08:40:010
24739914418,25cyclictest3093-21diskstats10:25:300
24739914416,22cyclictest32328-21diskstats10:05:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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