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2026-05-14 - 02:55

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 Wed May 13, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1903201999235,51cyclictest20650irq/252-8000000.ethernet08:25:010
1903201999235,51cyclictest20650irq/252-8000000.ethernet08:25:010
190320199903,11cyclictest1945001-21apt-get11:15:010
1903201998947,36cyclictest20650irq/252-8000000.ethernet08:20:000
1903201998925,53cyclictest1939084-21cron10:40:010
1903201998925,53cyclictest1939084-21cron10:40:000
1903201998120,51cyclictest1930916-21/usr/sbin/munin09:50:150
190320199811,2cyclictest0-21swapper/007:10:010
1903201997930,41cyclictest20650irq/252-8000000.ethernet11:50:000
1903201997930,41cyclictest20650irq/252-8000000.ethernet11:50:000
1903201997927,43cyclictest20650irq/252-8000000.ethernet11:30:180
1903201997724,46cyclictest1930659-21munin-plugin-st09:50:000
1903201997723,47cyclictest20650irq/252-8000000.ethernet09:20:240
1903201997523,46cyclictest20650irq/252-8000000.ethernet12:05:170
190320299741,25cyclictest0-21swapper/112:20:191
1903201997324,42cyclictest20650irq/252-8000000.ethernet09:40:160
1903201997310,24cyclictest0-21swapper/010:15:030
1903201997126,42cyclictest20650irq/252-8000000.ethernet12:25:200
1903201997125,42cyclictest20650irq/252-8000000.ethernet12:10:180
1903201997123,41cyclictest20650irq/252-8000000.ethernet10:00:300
1903201997027,38cyclictest0-21swapper/011:40:000
1903201997027,38cyclictest0-21swapper/011:40:000
1903201997026,40cyclictest1903888-21grep07:10:290
1903201997025,42cyclictest20650irq/252-8000000.ethernet07:35:010
1903201997025,42cyclictest20650irq/252-8000000.ethernet07:35:010
1903201997025,39cyclictest20650irq/252-8000000.ethernet11:05:000
1903201997024,40cyclictest20650irq/252-8000000.ethernet07:35:190
1903201997021,44cyclictest0-21swapper/008:50:010
1903201996925,41cyclictest20650irq/252-8000000.ethernet07:50:170
1903201996924,37cyclictest20650irq/252-8000000.ethernet10:05:150
1903201996922,45cyclictest0-21swapper/010:30:010
1903201996920,43cyclictest1939363-21df10:40:150
1903201996919,46cyclictest1919017-21df08:40:170
1903201996919,46cyclictest1919017-21df08:40:170
190320199681,2cyclictest0-21swapper/011:00:010
1903201996724,39cyclictest20650irq/252-8000000.ethernet10:30:150
1903201996643,20cyclictest20850irq/208-8000000.ethernet07:25:250
1903201996626,35cyclictest20650irq/252-8000000.ethernet10:10:170
1903201996626,35cyclictest20650irq/252-8000000.ethernet10:10:170
1903201996625,39cyclictest20650irq/252-8000000.ethernet09:15:180
1903201996625,38cyclictest20650irq/252-8000000.ethernet08:25:180
1903201996624,39cyclictest20650irq/252-8000000.ethernet11:15:180
1903201996618,44cyclictest0-21swapper/008:55:010
1903201996526,36cyclictest20650irq/252-8000000.ethernet08:10:190
1903201996526,36cyclictest20650irq/252-8000000.ethernet08:10:190
1903201996525,37cyclictest20650irq/252-8000000.ethernet09:05:150
1903201996523,36cyclictest20650irq/252-8000000.ethernet11:55:140
1903201996519,43cyclictest1913119-21ssh08:05:200
1903201996425,36cyclictest20650irq/252-8000000.ethernet09:55:180
1903201996424,38cyclictest0-21swapper/012:05:000
1903201996422,40cyclictest0-21swapper/011:55:010
190320599639,35cyclictest32-21ksoftirqd/208:40:012
1903201996326,33cyclictest20650irq/252-8000000.ethernet10:45:180
1903201996319,39cyclictest0-21swapper/012:35:210
1903201996319,38cyclictest0-21swapper/011:20:170
1903201996224,35cyclictest20650irq/252-8000000.ethernet10:50:190
1903201996224,35cyclictest20650irq/252-8000000.ethernet10:50:190
1903201996220,39cyclictest1918177-21/usr/sbin/munin08:35:170
1903201996219,40cyclictest0-21swapper/009:30:010
190320199613,53cyclictest1958558-21ptp4l12:30:250
1903201996126,31cyclictest20650irq/252-8000000.ethernet11:30:010
1903201996122,35cyclictest1928843-21grep09:35:290
1903201996122,35cyclictest1928843-21grep09:35:290
1903201996028,27cyclictest1911785-21tail07:55:280
1903201996025,32cyclictest20650irq/252-8000000.ethernet12:15:140
1903201996021,36cyclictest20650irq/252-8000000.ethernet12:24:430
1903201996019,38cyclictest1927552-21diskstats09:30:180
1903201996016,40cyclictest0-21swapper/009:05:010
1903201995923,33cyclictest20650irq/252-8000000.ethernet09:10:200
190320199591,9cyclictest1921665-21ssh08:55:200
1903201995821,9cyclictest1936501-21/usr/sbin/munin10:20:280
190320199571,20cyclictest1913566-21kworker/u8:2+ext4-rsv-conversion08:35:010
1903202995640,10cyclictest0-21swapper/109:00:001
1903201995625,28cyclictest20650irq/252-8000000.ethernet08:05:010
190320199554,10cyclictest1905873-21grep07:20:290
1903201995520,33cyclictest1943701-21cut11:05:200
1903201995515,3cyclictest0-21swapper/007:45:180
190320199542,9cyclictest1909251-21grep07:40:280
190320599531,23cyclictest0-21swapper/209:20:012
190320299531,19cyclictest0-21swapper/111:25:011
190320199531,24cyclictest1904551-21dropbear07:15:170
190320599502,26cyclictest0-21swapper/208:45:012
190320599502,26cyclictest0-21swapper/208:45:012
1903205994941,5cyclictest1933195-21munin-plugin-st10:05:002
1903202994928,11cyclictest0-21swapper/112:00:001
1903201994918,29cyclictest0-21swapper/011:44:430
1903202994836,8cyclictest0-21swapper/109:30:001
1903202994828,13cyclictest0-21swapper/111:35:001
1903202994738,5cyclictest1941626-21munin-plugin-st10:55:001
1903202994738,5cyclictest1941626-21munin-plugin-st10:55:001
1903202994735,6cyclictest0-21swapper/109:10:011
1903205994634,7cyclictest1949259-21grep11:35:302
1903205994634,7cyclictest1949259-21grep11:35:292
190320599462,19cyclictest0-21swapper/210:55:012
190320599462,19cyclictest0-21swapper/210:55:012
1903202994537,4cyclictest14-21rcu_preempt09:35:291
1903202994537,4cyclictest14-21rcu_preempt09:35:291
190320299446,5cyclictest0-21swapper/108:40:011
1903205994331,8cyclictest0-21swapper/209:05:002
1903202994334,6cyclictest0-21swapper/109:50:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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