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2025-09-05 - 07:37

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 Fri Sep 05, 2025 00:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1216221430,4chrt12164-21latency_hist23:10:010
1987721380,2sleep019879-21sort23:40:020
1349421260,2sleep013498-21modprobe21:10:010
1814321160,4sleep017534-21/usr/sbin/munin21:25:340
874121120,4sleep08740-21ntp_states20:50:250
2596221060,4sleep025987-21/usr/sbin/munin19:50:300
206182900,4sleep020691-21awk21:35:300
152542900,5sleep015325-21/usr/sbin/munin23:20:270
322642890,4sleep032323-21/usr/sbin/munin20:15:290
114022896,9sleep011467-21systemctl21:00:290
33532875,11sleep03414-21/usr/sbin/munin22:35:230
161762874,8sleep016222-21interrupts23:25:150
7642814,64sleep0770-21/usr/sbin/munin20:20:120
269892810,3sleep026987-21sendmail_mailst22:00:270
100302794,59sleep010093-21mailstats23:00:290
202672765,59sleep020266-21ntp_states23:40:210
151092765,60sleep015113-21memory21:15:200
217932745,58sleep021798-21ntp_states19:35:210
38772730,4sleep03883-21vmstat20:30:310
295852730,3sleep029647-21cat22:10:280
1398927319,30sleep014021-21ntpq19:05:190
1495399728,31cyclictest26681-21munin-node19:55:130
1495399639,19cyclictest20236-21/usr/sbin/munin19:30:210
292152620,2sleep029216-21ls20:05:000
14953996210,17cyclictest5752-21/usr/sbin/munin22:45:220
14953996210,17cyclictest31804-21memory00:25:210
1495399619,19cyclictest2243-21grep00:35:310
1495399619,17cyclictest15048-21/usr/sbin/munin19:10:220
1495399609,18cyclictest13486-21/usr/sbin/munin23:15:260
14953996028,22cyclictest31828-21latency_hist20:15:020
1495399599,18cyclictest8318-21/usr/sbin/munin22:55:210
14953995934,16cyclictest23022-21/usr/sbin/munin19:40:220
14953995932,16cyclictest877-21ntp_states22:25:250
14953995910,17cyclictest25764-21/usr/sbin/munin21:55:290
1495399589,17cyclictest26446-21/usr/sbin/munin00:05:280
1495399589,16cyclictest954-21grep00:30:280
1495399588,18cyclictest2000-21/usr/sbin/munin20:25:160
1495399588,16cyclictest18816-21/usr/sbin/munin21:30:180
14953995835,14cyclictest30939-21/usr/sbin/munin00:20:330
14953995834,14cyclictest14071-21/usr/sbin/munin21:10:260
1495399579,15cyclictest32731-21sshd22:23:310
1495399578,16cyclictest16930-21/usr/sbin/munin19:15:290
1495399577,18cyclictest5886-21/usr/sbin/munin20:40:310
1495399577,18cyclictest23137-21which21:45:260
14953995736,13cyclictest7222-21/usr/sbin/munin20:45:120
14953995716,14cyclictest22885-21proc_pri23:50:270
14953995710,15cyclictest17387-21/usr/sbin/munin23:30:280
1495399569,18cyclictest28970-21cat00:15:020
1495399569,18cyclictest24165-21/usr/sbin/munin23:55:250
1495399569,16cyclictest16246-21/usr/sbin/munin21:20:170
1495399569,15cyclictest5052-21wc20:35:270
1495399569,15cyclictest25340-21memory00:00:210
1495399568,16cyclictest24273-21ntp_states21:50:260
1495399568,14cyclictest17724-21seq19:20:150
1495399567,15cyclictest29283-21/usr/sbin/munin20:05:290
14953995632,14cyclictest30683-21/usr/sbin/munin22:15:200
1495399559,14cyclictest21412-21/usr/sbin/munin21:40:270
1495399559,13cyclictest29297-21/usr/sbin/munin00:15:250
1495399558,16cyclictest7037-21/usr/sbin/munin22:50:200
1495399558,16cyclictest1869-21/usr/sbin/munin22:30:280
14953995516,13cyclictest12183-21date23:10:030
14953995510,16cyclictest9796-21/usr/sbin/munin20:55:140
1495399549,16cyclictest24189-21/usr/sbin/munin19:45:150
1495399548,17cyclictest19004-21seq19:25:150
1495399547,16cyclictest28163-21ntpq22:05:230
1495399547,14cyclictest4528-21/usr/sbin/munin22:40:140
14953995431,15cyclictest21329-21df_inode23:45:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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