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2026-07-14 - 06:55

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 Tue Jul 14, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1681335999886,8cyclictest131ktimers/022:35:090
1681339996921,38cyclictest0-21swapper/200:20:002
1681335996758,4cyclictest0-21swapper/021:40:140
1681339996518,37cyclictest0-21swapper/223:15:312
168133999631,56cyclictest0-21swapper/219:35:272
1681339996223,29cyclictest0-21swapper/223:00:262
168133599626,19cyclictest20850irq/208-8000000.ethernet22:20:010
168133999602,14cyclictest1688626-21apt-get19:50:172
168133999602,14cyclictest1688626-21apt-get19:50:162
168133999596,12cyclictest1681332-21cyclictest23:30:012
1681339995921,32cyclictest0-21swapper/221:25:232
168133599591,25cyclictest15-21rcuc/019:15:020
1681339995826,27cyclictest0-21swapper/223:30:162
168133999582,14cyclictest1692002-21apt-get20:10:142
1681339995628,24cyclictest1283-21cron00:15:002
1681339995610,9cyclictest0-21swapper/200:25:292
1681339995513,6cyclictest0-21swapper/220:50:302
1681339995513,5cyclictest0-21swapper/200:25:012
1681339995513,5cyclictest0-21swapper/200:25:002
168133999551,13cyclictest1692840-21apt-get20:15:162
168133999551,13cyclictest1692840-21apt-get20:15:162
1681338995529,22cyclictest0-21swapper/121:00:301
168133999547,10cyclictest0-21swapper/219:55:292
1681339995419,31cyclictest0-21swapper/220:25:182
1681339995418,29cyclictest0-21swapper/219:45:292
1681339995417,32cyclictest0-21swapper/223:45:182
1681339995412,36cyclictest0-21swapper/200:10:012
1681335995446,4cyclictest167350irq/118-8000000.ethernet-tx019:55:270
168133599541,48cyclictest1732575-21unixbench_singl00:05:320
1681339995322,27cyclictest0-21swapper/222:10:202
1681339995322,26cyclictest0-21swapper/220:40:302
1681339995321,27cyclictest0-21swapper/221:10:262
1681339995318,29cyclictest0-21swapper/221:55:212
1681339995314,33cyclictest0-21swapper/220:05:012
1681338995344,5cyclictest0-21swapper/122:10:171
1681338995338,10cyclictest231ktimers/120:55:131
1681335995344,5cyclictest0-21swapper/021:10:110
168133599531,8cyclictest0-21swapper/023:35:010
1681339995222,25cyclictest0-21swapper/222:35:162
1681339995114,6cyclictest311ktimers/221:50:002
1681339995111,6cyclictest0-21swapper/220:45:242
1681339995110,6cyclictest1730786-21threads23:55:302
1681338995133,12cyclictest231ktimers/100:35:131
1681335995142,5cyclictest1737022-21munin-plugin-st00:35:000
168133599512,6cyclictest1699698-21sh20:55:200
168133599510,15cyclictest15-21rcuc/020:20:020
168133599510,15cyclictest15-21rcuc/020:20:020
168133999508,8cyclictest0-21swapper/221:20:282
168133999508,8cyclictest0-21swapper/221:20:282
168133999507,10cyclictest0-21swapper/223:20:212
168133999507,10cyclictest0-21swapper/223:20:212
1681339995025,21cyclictest274-21systemd-journal22:24:592
168133999502,10cyclictest1706058-21sed21:30:272
1681339995020,24cyclictest1715531-21sshd22:28:132
168133999501,5cyclictest0-21swapper/223:00:022
168133999501,5cyclictest0-21swapper/223:00:012
168133999501,24cyclictest0-21swapper/222:42:132
1681339995011,4cyclictest311ktimers/223:55:022
1681335995040,6cyclictest0-21swapper/000:25:010
1681335995040,6cyclictest0-21swapper/000:25:010
168133999496,9cyclictest0-21swapper/221:50:302
1681339994917,6cyclictest1696215-21/usr/sbin/munin20:35:192
1681339994915,4cyclictest0-21swapper/222:45:262
1681339994911,4cyclictest0-21swapper/222:20:002
1681338994930,12cyclictest0-21swapper/123:20:221
1681338994930,12cyclictest0-21swapper/123:20:211
168133599493,8cyclictest14-21rcu_preempt23:50:010
1681335994936,9cyclictest1283-21cron23:15:010
168133999482,12cyclictest1731129-21/usr/sbin/munin00:00:252
168133999482,12cyclictest1731129-21/usr/sbin/munin00:00:252
1681339994816,25cyclictest0-21swapper/219:20:282
1681339994812,4cyclictest0-21swapper/220:05:222
1681338994840,5cyclictest1725857-21grep23:30:001
1681338994835,9cyclictest1708597-21tail21:45:281
168133599482,29cyclictest1715711-21rm22:30:020
168133999479,7cyclictest0-21swapper/221:00:002
1681339994740,4cyclictest1683270-21munin-plugin-st19:20:012
168133999473,12cyclictest1711289-21unixbench_singl22:00:302
1681339994715,24cyclictest0-21swapper/222:10:012
1681339994713,27cyclictest0-21swapper/221:40:012
1681338994738,5cyclictest1728396-21munin-plugin-st23:45:001
1681338994725,15cyclictest231ktimers/120:05:141
1681335994741,3cyclictest167350irq/118-8000000.ethernet-tx021:45:210
1681339994613,4cyclictest0-21swapper/219:25:202
1681339994613,3cyclictest1702055-21latency_hist21:10:002
1681339994613,27cyclictest0-21swapper/219:10:182
1681338994637,5cyclictest1686549-21unixbench_multi19:35:301
1681335994637,5cyclictest0-21swapper/023:25:270
168133599461,4cyclictest0-21swapper/022:55:000
168133999458,3cyclictest1728441-21latency_hist23:45:002
168133999457,9cyclictest1695481-21grep20:30:212
168133999456,6cyclictest1723246-21grep23:10:292
168133899454,22cyclictest22-21rcuc/119:50:011
168133899454,22cyclictest22-21rcuc/119:50:011
1681338994534,6cyclictest0-21swapper/122:20:001
1681338994530,10cyclictest0-21swapper/120:50:311
1681338994530,10cyclictest0-21swapper/120:30:001
1681335994537,5cyclictest1706161-21munin-plugin-st21:35:000
168133999442,8cyclictest1716568-21ls22:35:012
1681338994426,9cyclictest0-21swapper/119:15:271
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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