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2023-10-04 - 01:22

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 
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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 20 highest latencies:
System rackeslot6s.osadl.org (updated Tue Oct 03, 2023 12:45:10)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
421370999083,5cyclictest23-21ksoftirqd/108:00:021
42136799684,34cyclictest438314-21/usr/sbin/munin08:45:270
42136799684,34cyclictest438314-21/usr/sbin/munin08:45:270
421370996415,32cyclictest476897-21/usr/sbin/munin12:30:281
421370996013,43cyclictest461573-21dropbear11:00:281
421370995922,15cyclictest471460-21apt-get12:00:061
421370995915,40cyclictest457167-21/usr/sbin/munin10:35:271
421370995915,40cyclictest457167-21/usr/sbin/munin10:35:261
421370995914,41cyclictest458986-21dropbear10:45:281
421370995910,44cyclictest928-21dropbear11:45:261
421367995946,7cyclictest428430-21kworker/u8:108:05:220
421367995831,19cyclictest12-21ksoftirqd/011:00:190
42137099578,14cyclictest423622-21df_inode07:20:271
421370995637,15cyclictest453082-21/usr/sbin/munin10:10:291
421370995634,17cyclictest454360-21users10:15:381
421370995633,17cyclictest449402-21/usr/sbin/munin09:50:381
421370995542,10cyclictest427878-21/usr/sbin/munin07:45:271
421370995534,16cyclictest434822-21/usr/sbin/munin08:25:231
421367995512,23cyclictest463144-21/usr/sbin/munin11:10:260
421367995512,23cyclictest463144-21/usr/sbin/munin11:10:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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