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2026-09-04 - 16:55

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Fri Sep 04, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2150422630,3sleep021507-21latency09:45:150
426021650,2sleep04262-21sh10:45:000
985121370,4chrt9842-21ntp_states11:05:230
3221121320,3sleep032213-21wc08:20:240
2969621270,3chrt29695-21/usr/sbin/munin10:15:300
2057021260,3sleep020571-21proc_pri07:35:230
1686721250,3chrt16866-21sort07:20:250
2967021240,4chrt29671-21sendmail_mailqu08:10:260
3159121140,3chrt31594-21latency_hist10:25:010
1526321080,3sleep015055-21/usr/sbin/munin07:15:200
9072980,4sleep0958-21ntpq08:25:190
150112970,3sleep015015-21ntp_states11:25:220
255272920,3sleep025548-21/usr/sbin/munin10:00:240
47532870,4sleep04770-21/usr/sbin/munin08:40:190
7262860,3sleep0768-21/usr/sbin/munin10:30:180
240522774,61sleep024058-21ntp_states12:00:240
180862760,3sleep018151-21cat07:25:270
225342750,3sleep022535-21awk11:55:160
1286826818,27sleep012935-21grep07:05:240
13672996630,27cyclictest27048-21/usr/sbin/munin08:00:240
1367299599,16cyclictest8411-21/usr/sbin/munin08:55:170
1367299598,19cyclictest12306-21/usr/sbin/munin09:10:130
1367299598,18cyclictest24244-21chrt07:50:150
13672995934,17cyclictest26731-21/usr/sbin/munin12:10:230
13672995934,16cyclictest11289-21/usr/sbin/munin11:10:310
1367299588,18cyclictest5847-21/usr/sbin/munin08:45:180
13672995832,16cyclictest20012-21runrttasks07:34:220
1367299579,16cyclictest30220-21/usr/sbin/munin12:25:150
1367299579,16cyclictest18605-21/usr/sbin/munin11:40:120
1367299578,18cyclictest31749-21sendmail-msp08:20:010
1367299578,17cyclictest21174-21/usr/sbin/munin11:50:180
13672995734,15cyclictest12240-21/usr/sbin/munin11:15:120
13672995734,14cyclictest17541-21/usr/sbin/munin09:30:110
13672995733,16cyclictest14506-21runrttasks09:17:580
13672995733,15cyclictest29525-21/usr/sbin/munin12:20:290
13672995733,15cyclictest15230-21/usr/sbin/munin09:20:230
13672995732,15cyclictest2523-21/usr/sbin/munin08:30:280
13672995731,17cyclictest2073-21/usr/sbin/munin10:35:220
13672995717,15cyclictest19165-21sendmail_mailqu09:35:240
1367299569,15cyclictest22931-21ntpq09:50:240
1367299569,13cyclictest11298-21ntp_states09:05:220
1367299568,18cyclictest25050-21/usr/sbin/munin12:05:130
1367299568,17cyclictest6951-21/usr/sbin/munin10:55:230
1367299568,16cyclictest31685-21/usr/sbin/munin10:25:270
1367299568,16cyclictest21533-21/usr/sbin/munin07:40:260
1367299568,14cyclictest16196-21/usr/sbin/munin09:25:250
1367299567,16cyclictest23920-21/usr/sbin/munin09:55:240
1367299567,14cyclictest9722-21/usr/sbin/munin09:00:250
13672995633,15cyclictest19937-21/usr/sbin/munin11:45:100
13672995632,16cyclictest27422-21runrttasks10:07:560
13672995632,16cyclictest13776-21/usr/sbin/munin11:20:260
13672995632,15cyclictest5132-21runrttasks10:46:390
13672995631,16cyclictest28253-21/usr/sbin/munin10:10:310
13672995619,14cyclictest21233-21idleruntime-cro09:45:000
1367299559,18cyclictest28264-21ntpq08:05:200
1367299558,17cyclictest17290-21/usr/sbin/munin11:35:250
1367299558,15cyclictest16017-21/usr/sbin/munin11:30:240
1367299558,13cyclictest7133-21/usr/sbin/munin08:50:270
1367299557,16cyclictest22957-21chrt07:45:160
1367299557,16cyclictest13773-21/usr/sbin/munin07:10:160
13672995531,15cyclictest27669-21/usr/sbin/munin12:15:120
13672995530,16cyclictest6703-21runrttasks10:54:030
13672995530,16cyclictest566-21/usr/sbin/munin12:35:170
13672995510,17cyclictest4427-21munin-run08:40:000
13672995427,16cyclictest8548-21runrttasks11:00:200
13672995328,16cyclictest25377-21/usr/sbin/munin07:55:090
13672995325,16cyclictest32023-21/usr/sbin/munin12:30:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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