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2026-08-09 - 08:15

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 Sun Aug 09, 2026 00:44:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
360992199990,47cyclictest3614582-21/usr/sbin/munin19:35:202
3609918998547,34cyclictest3660351-21sshd00:05:000
360991899753,32cyclictest20850irq/208-8000000.ethernet23:50:010
3609918997432,9cyclictest0-21swapper/000:25:300
3609918997432,9cyclictest0-21swapper/000:25:300
3609918997238,5cyclictest3627140-21munin-plugin-st20:49:590
360992199686,27cyclictest880-21avahi-daemon00:35:192
3609921996839,19cyclictest32-21ksoftirqd/222:05:182
3609921996559,3cyclictest32-21ksoftirqd/222:10:222
3609918996251,8cyclictest0-21swapper/020:35:110
360992199602,38cyclictest3611202-21/usr/sbin/munin19:15:202
360992199591,38cyclictest0-21swapper/223:05:012
360992199581,37cyclictest0-21swapper/220:50:012
3609919995848,4cyclictest231ktimers/120:05:021
3609919995848,4cyclictest231ktimers/120:05:021
3609921995542,8cyclictest3623616-21grep20:25:302
3609921995445,6cyclictest3639900-21munin-plugin-st22:05:002
3609921995413,21cyclictest3609913-21cyclictest20:35:142
3609919995444,5cyclictest3656115-21latency_hist23:40:001
3609919995436,13cyclictest231ktimers/119:55:141
3609918995349,2cyclictest0-21swapper/022:40:120
3609921995235,12cyclictest3618600-21sendmail20:00:012
3609918995240,4cyclictest0-21swapper/020:25:200
3609919995144,3cyclictest3663051-21sendmail00:20:011
3609919995142,5cyclictest3640741-21munin-plugin-st22:10:001
3609919995116,19cyclictest3660512-21gpg-connect-age00:05:011
3609918995132,13cyclictest131ktimers/000:15:130
360992199508,17cyclictest0-21swapper/219:15:012
360992199498,18cyclictest3612064-21/usr/sbin/munin19:20:182
3609918994937,4cyclictest131ktimers/021:35:130
360991899491,8cyclictest0-21swapper/019:30:020
360991899491,8cyclictest0-21swapper/019:30:020
3609921994834,10cyclictest3662284-21latency_hist00:15:012
3609921994834,10cyclictest3662284-21latency_hist00:15:012
3609919994830,14cyclictest231ktimers/121:35:141
3609919994830,11cyclictest231ktimers/120:00:151
360991899481,4cyclictest3643449-21latency_hist22:25:010
360991899476,15cyclictest15-21rcuc/019:15:000
360991899472,41cyclictest1660-21snmpd22:55:170
3609921994613,16cyclictest3645046-21apt-get22:35:022
3609919994638,5cyclictest3621074-21unixbench_singl20:10:291
3609919994634,9cyclictest231ktimers/121:55:141
3609919994631,11cyclictest231ktimers/122:20:141
3609919994631,10cyclictest231ktimers/123:20:121
3609918994627,13cyclictest131ktimers/023:55:160
3609918994621,23cyclictest0-21swapper/020:10:160
3609921994533,7cyclictest3628827-21sendmail21:00:002
3609921994526,11cyclictest0-21swapper/222:30:002
3609921994523,15cyclictest30-21rcuc/221:45:012
3609919994530,12cyclictest231ktimers/121:15:151
3609919994529,12cyclictest231ktimers/120:30:161
3609919994529,12cyclictest231ktimers/100:35:131
360991999452,23cyclictest0-21swapper/120:35:051
3609918994528,15cyclictest167350irq/118-8000000.ethernet-tx021:15:270
360991899452,40cyclictest0-21swapper/022:25:140
3609921994436,5cyclictest3609913-21cyclictest23:54:592
3609921994434,7cyclictest0-21swapper/219:30:272
3609921994431,9cyclictest3649359-21munin-plugin-st23:00:002
3609921994418,12cyclictest0-21swapper/220:50:132
360991999447,4cyclictest3645213-21rm22:35:011
3609919994431,10cyclictest231ktimers/119:45:131
3609919994430,9cyclictest231ktimers/123:30:161
3609919994430,11cyclictest231ktimers/121:10:141
3609919994428,10cyclictest231ktimers/100:05:141
360991899441,3cyclictest0-21swapper/021:50:010
3609921994324,12cyclictest0-21swapper/223:14:592
3609919994332,8cyclictest22-21rcuc/123:25:011
3609919994332,8cyclictest22-21rcuc/123:25:001
3609919994328,10cyclictest231ktimers/119:25:151
3609919994328,10cyclictest231ktimers/119:25:151
3609919994324,15cyclictest231ktimers/120:55:141
3609918994336,4cyclictest0-21swapper/000:25:000
360991899432,10cyclictest0-21swapper/020:20:010
3609921994229,8cyclictest3638968-21grep21:55:302
3609921994223,10cyclictest0-21swapper/219:30:002
3609921994223,10cyclictest0-21swapper/219:30:002
3609921994216,13cyclictest0-21swapper/221:05:142
3609921994216,13cyclictest0-21swapper/221:05:142
360991999429,7cyclictest3634733-21apt-get21:35:021
3609919994233,6cyclictest3639899-21munin-run22:05:001
3609919994228,9cyclictest0-21swapper/119:10:311
3609919994227,10cyclictest231ktimers/122:45:131
3609919994227,10cyclictest231ktimers/122:45:131
3609919994225,11cyclictest0-21swapper/123:15:011
3609919994222,13cyclictest231ktimers/123:40:111
360991899426,21cyclictest20850irq/208-8000000.ethernet23:05:200
3609918994236,4cyclictest0-21swapper/022:50:110
3609918994228,9cyclictest0-21swapper/022:35:010
360991899422,4cyclictest3631012-21meminfo21:10:250
360991899421,5cyclictest3640740-21munin-run22:10:000
360991899421,39cyclictest0-21swapper/022:15:010
3609921994126,9cyclictest0-21swapper/223:20:262
3609921994124,9cyclictest0-21swapper/219:40:222
360991999414,31cyclictest24-21ksoftirqd/122:15:191
3609919994135,4cyclictest3662112-21apt-get00:15:011
3609919994135,4cyclictest3662112-21apt-get00:15:011
3609919994127,10cyclictest231ktimers/122:40:151
3609919994127,10cyclictest231ktimers/121:50:091
3609919994126,11cyclictest231ktimers/119:40:141
360991899411,4cyclictest3642426-21munin-run22:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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