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2025-04-03 - 16:06

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 50 highest latencies:
System rack4slot6s.osadl.org (updated Thu Apr 03, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
958721290,4chrt9588-21sshd09:44:300
1375221270,2sleep013753-21modprobe10:01:000
1245721070,3sleep012455-21ntp_states12:20:240
316332980,3sleep031634-21systemctl09:00:320
3882999164,16cyclictest25790-21chrt08:35:280
3882999163,16cyclictest26090-21/usr/sbin/munin10:55:270
3882998857,18cyclictest17680-21/usr/sbin/munin10:20:290
3882998760,16cyclictest7289-21chrt07:21:220
3882998756,21cyclictest4622-21chrt07:10:470
221182870,4sleep022156-21/usr/sbin/munin08:20:160
3882998662,14cyclictest14028-21latency_hist12:30:020
171792860,4sleep017185-21awk08:00:250
3882998561,14cyclictest15574-21grep07:55:140
3882998463,12cyclictest14457-21runrttasks07:50:220
3882998457,16cyclictest16707-21rs:main0
3882998453,19cyclictest6350irq/103-63fec0010:30:260
18212840,4sleep01894-21grep09:10:280
3882998358,15cyclictest21983-21sed08:20:020
3172830,2sleep0318-21ntpq09:05:250
3882998251,19cyclictest31719-21ntp_states11:20:220
3882998157,13cyclictest22846-21awk10:40:290
3882998156,15cyclictest24276-21netstat08:30:170
3882998059,12cyclictest2660-21df_inode09:15:120
3882998057,15cyclictest15844-21chrt10:11:480
3882998056,13cyclictest24865-21chrt10:50:350
3882997954,15cyclictest28344-21chrt11:07:010
3882997954,13cyclictest14778-21chrt10:08:380
3882997854,15cyclictest29897-21/usr/sbin/munin08:55:300
284782770,3sleep028487-21modprobe08:50:000
3882997654,14cyclictest24129-21munin-run10:50:010
3882997653,14cyclictest15478-21cpu12:35:120
3882997651,14cyclictest29743-21chrt11:13:000
3882997648,18cyclictest290192sleep008:50:280
270627620,31sleep02741-21df07:05:140
3882997552,15cyclictest20943-21/usr/sbin/munin10:35:120
3882997552,13cyclictest18287-21if_eth008:05:140
3882997552,13cyclictest11099-21/usr/sbin/munin12:15:210
3882997351,13cyclictest10149-21users12:10:250
3882997253,11cyclictest3618-21df_inode11:40:150
3882997253,11cyclictest10934-21mailstats09:50:230
3882997251,11cyclictest8229-21chrt12:00:570
3882997149,13cyclictest7488-21ntp_states09:35:220
3882997149,10cyclictest148562chrt12:31:180
3882996947,11cyclictest193242chrt10:28:140
3882996849,9cyclictest52312chrt09:25:250
3882996848,13cyclictest11261-21sshd07:37:280
3882996754,9cyclictest0-21swapper12:05:330
3882996748,9cyclictest98182chrt07:31:060
3882996653,9cyclictest0-21swapper11:50:420
3882996653,9cyclictest0-21swapper09:24:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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