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2026-05-08 - 01:25

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 all highest latencies:
System rack4slot6s.osadl.org (updated Thu May 07, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
934422420,3sleep09346-21timerandwakeup07:50:260
2303722410,3sleep023038-21cat10:50:160
508621450,2sleep05087-21/usr/sbin/munin09:40:200
98521400,2sleep0986-21sendmail-msp07:20:010
30021213219,88sleep030098-21/usr/sbin/munin07:05:230
3220421290,5chrt32202-21ntp_states11:25:210
1555721270,3chrt15558-21cat08:15:190
810821230,4chrt7541-21/usr/sbin/munin07:45:260
2589221190,4chrt25891-21ntp_states08:55:220
629621140,3sleep06300-21missed_timers09:45:180
1609921110,3sleep016109-21latency_hist12:30:000
31692935,9sleep03196-21munin-run11:40:020
22672920,2sleep02268-21munin-plugin-st07:25:010
21602880,2sleep02159-21sort09:30:010
127142885,9sleep012764-21df08:05:140
37922850,3sleep03835-21ps09:35:250
252462845,8sleep0288-21snmpd10:59:380
89662810,3sleep09019-21processes09:55:250
311562795,10sleep030961-21/usr/sbin/munin07:10:200
103672765,58sleep010376-21users12:05:290
167842710,3sleep016812-21missed_timers08:20:180
117692710,3sleep011770-21grep08:00:230
30860996526,13cyclictest3797-21grep11:40:250
3086099609,17cyclictest30632-21/usr/sbin/munin11:20:190
3086099608,19cyclictest11282-21basename08:00:010
30860996035,15cyclictest30946-21/usr/sbin/munin09:15:160
30860996035,15cyclictest17629-21latency_hist10:30:010
125982603,5sleep00-21swapper10:10:140
3086099598,17cyclictest8492-21/usr/sbin/munin12:00:140
3086099597,17cyclictest4181-21/usr/sbin/munin07:30:260
30860995933,18cyclictest27458-21runrttasks11:06:210
30860995911,14cyclictest1066-21/usr/sbin/munin11:30:230
30860995910,16cyclictest13898-21forks10:15:140
3086099589,16cyclictest7430-21df_inode09:50:130
3086099589,16cyclictest18983-21/usr/sbin/munin10:35:260
3086099588,18cyclictest15429-21ntp_states10:20:220
3086099588,15cyclictest6742-21seq11:52:260
30860995832,17cyclictest5247-21/usr/sbin/munin07:35:220
30860995832,16cyclictest21034-21/usr/sbin/munin08:35:280
30860995832,14cyclictest17951-21/usr/sbin/munin10:30:200
30860995810,18cyclictest11308-21df10:05:130
30860995810,15cyclictest288-21snmpd08:30:250
30860995810,15cyclictest17519-21/usr/sbin/munin12:35:160
3086099579,13cyclictest21869-21ntp_states10:45:210
3086099578,16cyclictest13667-21/usr/sbin/munin12:20:140
3086099577,18cyclictest6262-21/usr/sbin/munin07:40:150
3086099576,17cyclictest17879-21/usr/sbin/munin08:25:170
30860995734,14cyclictest23570-21/usr/sbin/munin08:45:280
30860995732,16cyclictest446-21runrttasks09:22:090
30860995726,21cyclictest21456-21idleruntime-cro10:45:010
30860995711,14cyclictest12616-21tr12:15:180
140772570,4sleep014076-21fw_packets08:10:140
3086099569,15cyclictest11067-21/usr/sbin/munin12:10:180
3086099568,16cyclictest9957-21/usr/sbin/munin10:00:120
3086099568,15cyclictest29562-21ntpq11:15:200
3086099568,15cyclictest28026-21/usr/sbin/munin11:10:170
3086099567,17cyclictest28365-21ls09:05:190
3086099567,17cyclictest2206-21/usr/sbin/munin09:30:280
3086099567,15cyclictest7185-21egrep11:55:110
30860995633,14cyclictest2638-21/usr/sbin/munin07:25:190
30860995630,16cyclictest22653-21runrttasks08:42:550
3086099558,14cyclictest260452sleep011:00:280
3086099557,15cyclictest16234-21/usr/sbin/munin12:30:110
30860995531,14cyclictest4779-21/usr/sbin/munin11:45:160
30860995519,13cyclictest29991-21switchtime09:10:270
3086099548,16cyclictest288-21snmpd09:04:160
3086099548,11cyclictest24381-21df_inode08:50:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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