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2025-11-08 - 14:09

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 Sat Nov 08, 2025 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304721330,4chrt3049-21switchtime08:40:580
875821280,3chrt8760-21latency_hist11:10:010
1845021270,4chrt18448-21open_inodes07:35:250
3084421260,3chrt30845-21/usr/sbin/munin12:35:130
2477021210,3chrt24771-21ntp_states10:05:220
1609921150,3sleep016101-21timerandwakeup07:25:290
1304521100,3sleep012853-21/usr/sbin/munin09:20:190
2618721010,2sleep026189-21awk10:10:290
2313621010,3sleep023179-21if_eth012:05:160
182802880,3sleep018279-21sendmail_mailqu11:45:270
141722865,9sleep014181-21memory11:30:180
12402860,3sleep01253-21/usr/sbin/munin08:35:150
73932810,2sleep07398-21modprobe11:05:010
198922790,2sleep019893-21run-parts07:40:270
283772770,3sleep028376-21grep10:20:120
1151727722,30sleep011541-21munin-run07:10:010
98102763,5sleep00-21swapper11:13:450
117232740,5sleep011722-21memory09:15:190
68262700,3sleep06892-21timerandwakeup08:55:300
212222673,5sleep00-21swapper09:50:420
312312664,52sleep031232-21ntp_states10:30:240
1156899658,21cyclictest22189-21snmpd10:45:010
1156899619,17cyclictest10382-21ntp_states11:15:230
11568996126,25cyclictest0-21swapper09:29:480
1156899608,17cyclictest23467-21ntpq10:00:220
1156899608,15cyclictest20726-21/usr/sbin/munin07:45:170
1156899599,16cyclictest7661-21/usr/sbin/munin09:00:340
1156899598,16cyclictest3776-21/usr/sbin/munin08:45:150
1156899598,15cyclictest29510-21/usr/sbin/munin12:30:200
1156899597,18cyclictest32355-21/usr/sbin/munin08:30:160
11568995934,16cyclictest16987-21/usr/sbin/munin09:35:240
11568995915,13cyclictest14099-21sshd07:19:560
11568995911,16cyclictest22189-21snmpd07:24:130
1156899588,18cyclictest21612-21latency_hist12:00:000
1156899588,17cyclictest27050-21/usr/sbin/munin10:15:140
1156899587,18cyclictest28467-21/usr/sbin/munin08:15:180
1156899587,17cyclictest4805-21awk10:55:000
1156899586,17cyclictest21876-21/usr/sbin/munin09:55:150
11568995834,15cyclictest24862-21/usr/sbin/munin08:00:200
11568995833,14cyclictest28489-21/usr/sbin/munin12:25:220
11568995832,15cyclictest17111-21/usr/sbin/munin07:30:250
1156899579,20cyclictest2619-21ntpq10:45:210
1156899579,16cyclictest22189-21snmpd11:50:180
1156899578,18cyclictest25989-21idleruntime08:05:170
1156899578,16cyclictest8948-21/usr/sbin/munin09:05:240
11568995733,16cyclictest10407-21/usr/sbin/munin09:10:180
11568995732,16cyclictest22988-21latency_hist12:05:010
11568995711,17cyclictest26322-21sshd12:16:160
11568995711,16cyclictest29957-21sshd10:25:270
11568995711,16cyclictest23362-21df_inode07:55:170
11568995710,16cyclictest6098-21munin-run11:00:000
1156899569,16cyclictest27186-21/usr/sbin/munin08:10:190
1156899569,15cyclictest11425-21grep11:20:130
1156899569,14cyclictest32222-21/usr/sbin/munin10:35:140
1156899569,14cyclictest12778-21chrt11:25:170
1156899569,13cyclictest15844-21systemctl09:30:270
1156899567,14cyclictest15280-21/usr/sbin/munin11:35:220
11568995632,15cyclictest31590-21/usr/sbin/munin08:25:310
11568995618,13cyclictest30134-21sshd08:20:260
11568995610,16cyclictest16654-21df_inode11:40:140
1156899559,13cyclictest22089-21/usr/sbin/munin07:50:160
1156899559,12cyclictest26942-21/usr/sbin/munin12:20:220
1156899557,16cyclictest5327-21ntpq08:50:210
11568995531,16cyclictest24479-21/usr/sbin/munin12:10:170
11568995516,13cyclictest269-21runrttasks07:13:140
11568995510,30cyclictest19601-21ntp_states09:45:240
1156899549,15cyclictest18030-21egrep09:40:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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