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2025-12-09 - 22:42

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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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 Tue Dec 09, 2025 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2877121490,4chrt28772-21lockfile-create09:00:000
980921410,3chrt9495-21/usr/sbin/munin07:45:240
449721320,3chrt4500-21mailstats11:35:270
76921300,4chrt770-21/usr/sbin/munin07:10:250
2371021290,3chrt23711-21if_eth010:45:150
2137621270,3sleep021375-21ntp_kernel_err08:30:200
31655212016,24sleep031661-21df_inode07:05:130
1086721000,3sleep010909-21/usr/sbin/munin09:55:200
206992980,3sleep020711-21modprobe12:40:010
16282970,4sleep01669-21memory11:25:210
39192940,3sleep03918-21idleruntime-cro11:35:000
326372910,4sleep032672-21ls09:15:010
195962910,2sleep019598-21sort10:30:010
250712900,4sleep025074-21df_inode08:45:150
67652865,9sleep06782-21munin-run07:35:010
197072864,9sleep019718-21idleruntime-cro08:25:000
181552790,3sleep018195-21latency_hist12:30:010
237252784,61sleep023775-21df08:40:120
33999618,19cyclictest19839-21/usr/sbin/munin08:25:290
33999618,16cyclictest9205-21/usr/sbin/munin11:55:280
339996110,18cyclictest7977-21latency_hist09:45:020
339996110,15cyclictest27753-21ntp_states11:00:240
339996022,15cyclictest1430-21latency_hist11:25:010
339996013,19cyclictest5333-21sshd09:34:540
339995935,16cyclictest12268-21/usr/sbin/munin10:00:250
339995921,14cyclictest26621-21open_inodes08:50:260
339995910,17cyclictest19704-21/usr/sbin/munin10:30:270
33999589,17cyclictest7217-21open_files07:35:250
33999588,16cyclictest15696-21/usr/sbin/munin12:20:310
33999587,18cyclictest32759-21/usr/sbin/munin09:15:150
339995810,16cyclictest15559-21munin-run12:20:000
339995810,15cyclictest2910-21/usr/sbin/munin09:25:170
33999579,18cyclictest8279-21chrt07:40:160
33999579,17cyclictest26422-21tr10:55:230
33999579,15cyclictest18860-21users12:30:300
33999579,14cyclictest7927-21/usr/sbin/munin11:50:280
33999578,18cyclictest17239-21/usr/sbin/munin08:15:270
33999578,17cyclictest16010-21df_inode08:10:140
33999578,16cyclictest5878-21/usr/sbin/munin11:40:300
33999578,15cyclictest13378-21/usr/sbin/munin08:00:220
33999578,13cyclictest2020-21ntp_states07:15:240
33999577,17cyclictest31329-21/usr/sbin/munin11:15:250
33999577,17cyclictest10775-21/usr/sbin/munin07:50:100
339995732,16cyclictest2218-21/usr/sbin/munin09:20:290
339995719,12cyclictest150122chrt10:10:290
33999568,15cyclictest29053-21/usr/sbin/munin09:00:160
33999568,15cyclictest28985-21/usr/sbin/munin11:05:200
33999568,15cyclictest24873-21/usr/sbin/munin10:50:190
33999568,15cyclictest23599-21chrt08:40:000
33999568,15cyclictest10515-21/usr/sbin/munin12:00:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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