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2024-04-20 - 00:50

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackeslot6s.osadl.org (updated Fri Apr 19, 2024 12:44:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4046992991463,31cyclictest4095241-21kworker/u8:2+ext4-rsv-conversion12:00:012
4046992991434,28cyclictest4050595-21kworker/u8:4+ext4-rsv-conversion08:10:012
404699299672,23cyclictest0-21swapper/208:20:012
4046988996359,2cyclictest0-21swapper/011:35:010
4046988996016,5cyclictest4090210-21apt-config11:25:000
404699299551,39cyclictest0-21swapper/211:25:012
4046989995226,17cyclictest231ktimers/110:05:111
404698899521,25cyclictest0-21swapper/010:15:020
4046989995127,20cyclictest231ktimers/109:05:101
4046988995043,4cyclictest4085792-21sendmail11:00:010
4046988995042,6cyclictest4080729-21grep10:30:000
404698899501,39cyclictest0-21swapper/009:10:130
404698899484,11cyclictest4047813-21munin-node07:15:010
4046989994734,9cyclictest0-21swapper/111:20:001
4046989994732,9cyclictest0-21swapper/110:10:301
4046989994732,9cyclictest0-21swapper/109:55:001
4046989994714,27cyclictest4099932-21if_eth012:20:241
4046989994638,5cyclictest4069328-21munin-plugin-st09:20:001
4046988994630,8cyclictest0-21swapper/008:35:290
4046989994533,6cyclictest0-21swapper/110:05:021
4046989994526,13cyclictest231ktimers/111:55:151
4046988994531,10cyclictest0-21swapper/009:55:290
404698899451,42cyclictest0-21swapper/012:00:020
404698899451,39cyclictest4088435-21latency_hist11:15:010
4046989994433,6cyclictest4079802-21grep10:20:251
4046989994432,7cyclictest0-21swapper/107:55:281
4046989994425,12cyclictest231ktimers/110:35:121
4046988994430,9cyclictest0-21swapper/008:55:300
4046988994429,11cyclictest0-21swapper/007:25:270
404698899441,8cyclictest0-21swapper/009:35:020
404698899441,8cyclictest0-21swapper/009:35:010
404699299435,22cyclictest4054156-21gpg-connect-age07:50:012
4046992994336,3cyclictest4060001-21munin-plugin-st08:25:002
4046992994334,6cyclictest4071865-21munin-plugin-st09:35:002
4046992994334,6cyclictest4071865-21munin-plugin-st09:35:002
4046992994329,8cyclictest0-21swapper/207:15:012
4046989994331,6cyclictest4076078-21grep09:55:301
4046989994328,8cyclictest0-21swapper/109:15:011
4046989994325,13cyclictest231ktimers/112:05:101
4046989994325,13cyclictest231ktimers/110:55:091
4046989994321,14cyclictest231ktimers/107:10:101
4046988994334,6cyclictest0-21swapper/011:10:000
4046988994330,9cyclictest0-21swapper/010:20:250
4046988994330,9cyclictest0-21swapper/008:50:310
4046988994329,9cyclictest0-21swapper/008:10:000
4046988994329,10cyclictest0-21swapper/007:20:300
404698899431,12cyclictest14-21rcu_preempt10:05:010
4046992994235,4cyclictest4065896-21latency_hist09:00:002
4046992994232,5cyclictest0-21swapper/211:00:312
4046992994232,5cyclictest0-21swapper/211:00:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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