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2025-12-02 - 16:18

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the highest latencies:
System rack4slot6s.osadl.org (updated Tue Dec 02, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292222440,3sleep02919-21awk07:25:010
74321480,3chrt744-21/usr/sbin/munin09:20:250
828421390,2sleep08287-21missed_timers09:50:200
1726921330,3chrt17267-21ntp_states12:30:220
1896221310,2sleep018960-21sendmail_mailst08:25:260
843121180,3sleep08430-21threads11:55:290
2673621140,2sleep026738-21ls11:00:300
314659910573,19cyclictest31562-21/usr/sbin/munin07:10:170
314659910472,19cyclictest29153-21sendmail_mailqu11:10:290
314659910175,15cyclictest1748-21/usr/sbin/munin11:30:210
314659910172,17cyclictest27737-21irqstats09:00:170
314659910172,16cyclictest19925-21netstat10:35:210
314659910073,17cyclictest22438-21irqstats10:45:170
314659910073,16cyclictest13383-21ntp_states12:15:240
314659910072,15cyclictest32253-21seq09:16:570
314659910071,15cyclictest17132-21munin-node10:25:130
1208421000,3sleep012086-21cpu08:00:100
31465999972,15cyclictest30377-21/usr/sbin/munin09:10:200
31465999972,15cyclictest1498-21runrttasks07:19:130
31465999968,20cyclictest22189-21snmpd12:35:130
31465999963,22cyclictest13391-21wc10:10:180
31465999871,17cyclictest17859-21users08:20:290
31465999871,16cyclictest16114-21ntpq10:20:200
31465999870,16cyclictest9604-21if_eth007:50:130
31465999868,17cyclictest27681-21runrttasks11:05:200
31465999771,14cyclictest30175-21irqstats11:15:170
31465999770,16cyclictest2957-21df_inode09:30:130
31465999769,15cyclictest25347-21/usr/sbin/munin10:55:290
31465999768,16cyclictest17129-21munin-run08:20:010
31465999763,22cyclictest5382-21wc09:40:010
31465999760,22cyclictest15884-21memory12:25:200
31465999673,13cyclictest9413-21memory12:00:170
31465999673,13cyclictest10084-21chrt09:56:320
31465999671,16cyclictest26577-21ntp_states08:55:250
31465999671,15cyclictest10878-21ps12:05:290
31465999670,15cyclictest14799-21irqstats08:10:160
31465999670,14cyclictest7300-21seq11:51:010
31465999670,13cyclictest29475-21uptime09:05:290
31465999669,15cyclictest7065-21/usr/sbin/munin07:40:170
31465999663,21cyclictest3233-21memory07:25:180
222672960,3sleep022282-21sh08:39:590
31465999568,16cyclictest4936-21chrt11:42:400
31465999568,15cyclictest2892-21/usr/sbin/munin11:35:170
31465999567,16cyclictest26173-21latency_hist08:55:010
31465999560,20cyclictest5686-21sshd09:40:190
31465999470,15cyclictest5806-21runrttasks07:35:200
31465999469,16cyclictest24743-21munin-run10:55:010
31465999469,14cyclictest6347-21chrt11:48:450
31465999469,14cyclictest21062-21df10:40:130
31465999467,16cyclictest14521-21/usr/sbin/munin10:15:290
196422940,3sleep019643-21cat10:35:010
31465999370,13cyclictest6923-21irqstats09:45:160
31465999369,12cyclictest23913-21memory08:45:200
31465999368,15cyclictest10816-21cat10:00:170
31465999368,14cyclictest32522-21/usr/sbin/munin11:25:010
31465999368,14cyclictest1670-21df09:25:130
31465999268,14cyclictest11959-21basename08:00:010
31465999267,14cyclictest14077-21runrttasks08:06:170
31465999267,14cyclictest12446-21ls10:05:290
31465999265,16cyclictest269-21runrttasks08:42:130
31465999257,22cyclictest8492-21sshd07:45:210
31465999165,15cyclictest5487-21munin-run07:35:010
31465999163,15cyclictest20880-21chrt08:34:090
31465999157,21cyclictest14411-21/usr/sbin/munin12:20:160
31465999065,14cyclictest12276-21mailstats12:10:290
31465999059,19cyclictest313-21seq11:25:150
31465998259,13cyclictest31506-21seq07:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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