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2024-07-16 - 16:01

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 20 highest latencies:
System rack4slot6s.osadl.org (updated Tue Jul 16, 2024 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2162922650,2sleep021630-21/usr/sbin/munin08:10:160
1502322510,3sleep015024-21/usr/sbin/munin11:55:270
1917421790,3sleep019173-21threads12:10:330
2325521610,2sleep023254-21timerwakeupswit10:20:380
336621360,4chrt3367-21missed_timers11:10:260
1243521290,4chrt12433-21fw_packets09:40:140
638821280,4chrt6387-21/usr/sbin/munin07:10:270
59669912710,16cyclictest17671-21ntp_states12:05:290
59669912417,15cyclictest9842-21fw_packets09:30:120
59669911810,16cyclictest5928-21df_inode09:15:130
5966991179,12cyclictest25385-21ntp_states12:35:240
5966991169,16cyclictest18806-21/usr/sbin/munin10:05:410
5966991169,13cyclictest30629-21snmpd12:00:240
5966991167,17cyclictest17378-21modprobe10:00:000
5966991167,16cyclictest12386-21load11:45:210
5966991159,16cyclictest17591-21/usr/sbin/munin10:00:130
59669911534,69cyclictest12599-21/usr/sbin/munin07:35:160
59669911510,20cyclictest31934-21df08:50:160
5966991149,17cyclictest2471-21users11:05:320
5966991149,15cyclictest8042-21chrt07:16:130
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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