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2025-12-25 - 07:08

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Thu Dec 25, 2025 00:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3172822360,2sleep031724-21cat23:05:170
2155421750,3chrt21556-21open_files22:25:230
219721430,2sleep02198-21threads23:15:280
2070321390,2sleep020702-21vmstat20:15:310
3079921190,4chrt30798-21/usr/sbin/munin23:00:280
2814721150,2sleep028149-21ntpq20:45:210
2259921150,4sleep022535-21/usr/sbin/munin22:30:170
745821140,4chrt7209-21/usr/sbin/munin19:25:170
630421100,4chrt6303-21timerwakeupswit21:25:260
39021070,4sleep0394-21grep23:10:110
638721060,4chrt6389-21mailstats19:20:270
2022921050,3chrt20226-21grep22:20:200
384621040,2sleep03849-21wc19:10:270
182392960,3sleep018240-21sshd20:06:180
139382940,2sleep013940-21grep21:55:260
227829356,24sleep02288-21/usr/sbin/munin19:05:180
240732900,3sleep024100-21/usr/sbin/munin22:35:210
149332830,3sleep014952-21latency22:00:170
176312794,8sleep017647-21ntp_states22:10:190
20532745,58sleep02055-21memory21:10:190
79072683,5sleep00-21swapper21:32:420
322899609,19cyclictest3146-21/usr/sbin/munin21:15:260
322899608,18cyclictest4610-21/usr/sbin/munin19:15:120
3228996014,15cyclictest8373-21/usr/sbin/munin23:40:190
322899598,16cyclictest13651-21/usr/sbin/munin19:50:280
3228995933,17cyclictest29238-21/usr/sbin/munin20:50:170
322899589,16cyclictest17242-21awk22:10:000
322899588,19cyclictest4292-21/usr/sbin/munin23:25:290
322899587,14cyclictest5572-21/usr/sbin/munin23:30:120
3228995834,16cyclictest4784-21/usr/sbin/munin21:20:230
3228995833,16cyclictest12938-21/usr/sbin/munin19:45:270
3228995832,16cyclictest11224-21/usr/sbin/munin21:45:230
3228995811,15cyclictest22757-21seq20:25:130
3228995810,17cyclictest21563-21irqstats20:20:150
3228995810,14cyclictest24037-21df20:30:120
322899578,16cyclictest25123-21/usr/sbin/munin22:40:160
322899578,16cyclictest21068-21munin-node00:30:120
322899578,16cyclictest19490-21sshd22:17:240
3228995734,16cyclictest20709-21runrttasks00:28:090
3228995733,15cyclictest9898-21/usr/sbin/munin21:40:210
322899569,16cyclictest17181-21/usr/sbin/munin00:15:240
322899569,16cyclictest16087-21memory00:10:190
322899569,15cyclictest16251-21/usr/sbin/munin20:00:300
322899569,15cyclictest10610-21munin-run23:50:010
322899567,16cyclictest25272-21/usr/sbin/munin20:35:240
322899567,16cyclictest11090-21/usr/sbin/munin19:40:280
322899567,15cyclictest27691-21/usr/sbin/munin22:50:270
3228995633,15cyclictest10981-21/usr/sbin/munin23:50:190
3228995633,14cyclictest12014-21/usr/sbin/munin23:55:120
3228995632,15cyclictest18939-21/usr/sbin/munin00:20:250
3228995631,16cyclictest30689-21runrttasks20:55:200
3228995631,16cyclictest13327-21runrttasks21:54:510
3228995611,14cyclictest754-21memory21:05:180
86592550,3sleep08662-21latency19:30:160
322899558,14cyclictest30151-21sendmail23:00:000
322899558,14cyclictest13329-21/usr/sbin/munin00:00:180
322899557,16cyclictest22617-21sshd00:35:170
3228995531,16cyclictest10597-21runrttasks19:37:150
3228995531,15cyclictest32475-21runrttasks21:01:300
3228995531,15cyclictest27091-21/usr/sbin/munin20:40:260
3228995529,16cyclictest26503-21/usr/sbin/munin22:45:140
322899548,17cyclictest15217-21ntpq19:55:220
322899548,15cyclictest6852-21/usr/sbin/munin23:35:140
322899548,15cyclictest2999-21/usr/sbin/munin23:20:150
322899546,15cyclictest8320-21/usr/sbin/munin21:35:150
3228995429,16cyclictest19632-21runrttasks20:12:100
3228995310,15cyclictest14970-21/usr/sbin/munin00:05:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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