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2025-07-19 - 10:39

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 100 highest latencies:
System rackeslot6s.osadl.org (updated Sat Jul 19, 2025 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
659329910181,6cyclictest0-21swapper/020:10:000
65932997771,4cyclictest0-21swapper/022:05:010
65932997771,4cyclictest0-21swapper/022:05:010
6593599717,25cyclictest0-21swapper/121:40:011
65936996920,13cyclictest112300-21/usr/sbin/munin23:40:202
6593299693,50cyclictest0-21swapper/023:45:010
65932996212,16cyclictest0-21swapper/023:30:000
65932996212,16cyclictest0-21swapper/023:30:000
6593299581,30cyclictest0-21swapper/000:20:000
6593599571,38cyclictest0-21swapper/123:40:211
65932995538,9cyclictest109476-21grep23:20:290
65936995417,15cyclictest114908-21/usr/sbin/munin23:55:202
6593599545,20cyclictest66879-21processes19:15:011
65932995448,4cyclictest0-21swapper/022:00:020
65935995314,8cyclictest14-21rcu_preempt20:30:011
65932995311,37cyclictest293-21systemd-journal19:25:210
65936995229,17cyclictest311ktimers/223:20:142
6593599529,18cyclictest86006-21/usr/sbin/munin21:05:201
65932995232,12cyclictest0-21swapper/021:50:130
65936995123,17cyclictest311ktimers/219:45:122
65935995137,10cyclictest0-21swapper/120:10:001
65936995029,16cyclictest311ktimers/222:30:142
65932995044,4cyclictest106174-21apt23:05:010
6593299503,42cyclictest0-21swapper/000:05:010
65932995030,13cyclictest0-21swapper/021:15:150
65932995027,10cyclictest0-21swapper/020:20:130
6593299494,5cyclictest84234-21latency_hist20:55:010
6593299494,5cyclictest84234-21latency_hist20:55:010
65932994929,15cyclictest0-21swapper/019:50:140
65932994923,21cyclictest105273-21grep22:55:310
6593299491,46cyclictest0-21swapper/019:55:120
65936994839,5cyclictest119029-21munin-plugin-st00:20:002
65932994834,10cyclictest0-21swapper/020:45:260
65932994832,10cyclictest81505-21head20:35:350
65932994831,14cyclictest0-21swapper/021:35:170
65932994822,19cyclictest20750irq/251-8000000.ethernet23:10:120
65936994733,9cyclictest0-21swapper/222:25:002
65932994726,12cyclictest0-21swapper/021:45:310
65935994638,5cyclictest78205-21sendmail20:20:001
65935994635,7cyclictest101953-21sendmail22:39:591
65932994642,2cyclictest0-21swapper/020:15:100
65932994627,14cyclictest0-21swapper/023:55:160
65932994617,3cyclictest116162-21memory00:00:260
65932994613,9cyclictest82553-21cat20:45:010
65932994612,28cyclictest100830-21processes22:30:300
65932994611,29cyclictest103839-21apt-get22:50:100
65932994610,33cyclictest66786-21latency_hist19:15:020
65936994534,6cyclictest102797-21munin-plugin-st22:45:002
65936994533,7cyclictest0-21swapper/219:10:302
65935994531,9cyclictest0-21swapper/122:00:001
65935994531,7cyclictest0-21swapper/122:55:001
6593299459,34cyclictest84973-21cat21:00:000
65932994538,4cyclictest20750irq/251-8000000.ethernet19:20:000
65932994531,9cyclictest119825-21grep00:20:300
65932994531,9cyclictest119825-21grep00:20:290
65932994530,10cyclictest0-21swapper/022:45:290
65932994517,26cyclictest0-21swapper/023:30:280
65932994515,27cyclictest108682-21sshd23:17:070
65936994421,18cyclictest311ktimers/200:10:142
65935994426,8cyclictest0-21swapper/120:20:301
65932994418,16cyclictest0-21swapper/023:50:160
65932994418,16cyclictest0-21swapper/023:50:160
65932994417,3cyclictest89441-21df21:25:150
65932994413,27cyclictest0-21swapper/023:35:280
65936994329,10cyclictest0-21swapper/200:05:002
65936994325,13cyclictest311ktimers/222:35:142
65936994324,13cyclictest311ktimers/220:10:142
65936994324,13cyclictest311ktimers/220:10:132
6593599431,2cyclictest0-21swapper/119:35:021
6593299436,16cyclictest0-21swapper/022:25:010
65932994332,6cyclictest72589-21sh19:45:200
65932994331,8cyclictest80670-21grep20:30:300
65932994330,11cyclictest121975-21/usr/sbin/munin00:35:240
65932994328,10cyclictest0-21swapper/021:00:200
65932994327,11cyclictest77358-21latency_hist20:15:000
65932994327,11cyclictest77358-21latency_hist20:15:000
65932994326,13cyclictest0-21swapper/023:05:220
65932994316,3cyclictest69858-21apt-get19:30:110
65936994236,3cyclictest107017-21munin-plugin-st23:09:592
65936994230,8cyclictest0-21swapper/200:35:302
65936994221,11cyclictest0-21swapper/220:55:302
6593599421,9cyclictest0-21swapper/121:35:011
65932994234,5cyclictest90228-21apt-get21:30:150
65932994211,29cyclictest0-21swapper/019:35:220
65936994127,9cyclictest0-21swapper/223:45:302
65936994125,11cyclictest311ktimers/219:15:152
65935994135,3cyclictest116023-21sh00:00:211
65932994137,2cyclictest0-21swapper/019:40:010
65932994128,8cyclictest87382-21grep21:10:300
65932994128,10cyclictest95398-21apt-get22:00:170
65932994126,11cyclictest0-21swapper/022:15:140
65932994126,10cyclictest97301-21/usr/sbin/munin22:10:260
65932994125,10cyclictest0-21swapper/020:00:130
6593299411,35cyclictest0-21swapper/000:30:220
65936994031,5cyclictest117250-21grep00:05:342
65936994030,6cyclictest0-21swapper/200:30:302
65936994028,8cyclictest0-21swapper/219:30:282
65936994027,8cyclictest0-21swapper/220:25:312
65936994017,17cyclictest311ktimers/220:50:172
65936994017,17cyclictest311ktimers/220:50:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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