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2026-03-17 - 21:54

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 Mar 17, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18612219911513,82cyclictest1886989-21apt-get09:40:020
1861221998377,3cyclictest20650irq/252-8000000.ethernet09:30:010
1861221998377,3cyclictest20650irq/252-8000000.ethernet09:30:010
1861221997635,36cyclictest1912586-21unixbench_multi12:05:290
1861224996717,19cyclictest1899943-21/usr/sbin/munin10:55:201
186122199671,64cyclictest0-21swapper/011:25:010
1861221996640,22cyclictest167350irq/118-8000000.ethernet-tx011:45:000
1861221996633,29cyclictest20650irq/252-8000000.ethernet12:40:000
1861221996629,33cyclictest0-21swapper/008:55:310
186122199661,3cyclictest1901519-21sed11:05:010
1861224996510,32cyclictest0-21swapper/109:55:001
186122499646,22cyclictest0-21swapper/108:50:011
186122199643,6cyclictest0-21swapper/011:10:000
186122499633,13cyclictest1899104-21/usr/sbin/munin10:50:181
1861221996326,32cyclictest0-21swapper/008:44:590
186122499629,24cyclictest0-21swapper/111:20:011
1861225996145,11cyclictest1908411-21latency_hist11:45:012
1861224996111,18cyclictest1905953-21/usr/sbin/munin11:30:161
1861221996138,15cyclictest167350irq/118-8000000.ethernet-tx011:45:020
186122199613,3cyclictest1868116-21grep07:45:290
1861221995926,29cyclictest0-21swapper/009:35:280
186122199582,54cyclictest0-21swapper/008:30:270
1861221995720,32cyclictest0-21swapper/011:15:210
1861221995626,25cyclictest1915371-21cat12:25:000
186122199562,5cyclictest1874128-21sed08:20:270
1861221995617,35cyclictest0-21swapper/008:00:250
186122199561,5cyclictest274-21systemd-journal07:15:200
186122199561,4cyclictest1870028-21cat08:00:000
1861221995541,9cyclictest0-21swapper/010:25:280
1861221995532,20cyclictest167350irq/118-8000000.ethernet-tx010:15:230
1861221995532,20cyclictest167350irq/118-8000000.ethernet-tx010:15:230
1861221995527,24cyclictest20650irq/252-8000000.ethernet08:10:250
186122199552,5cyclictest1883613-21munin-run09:20:010
186122199552,3cyclictest1914065-21cut12:15:250
186122199552,3cyclictest1914065-21cut12:15:240
186122199551,50cyclictest0-21swapper/012:00:010
186122199551,4cyclictest1909581-21lsblk11:50:210
186122499540,19cyclictest0-21swapper/112:35:021
186122199544,47cyclictest0-21swapper/010:35:010
186122199543,43cyclictest0-21swapper/012:30:000
1861221995420,29cyclictest1905674-21grep11:25:300
186122199541,5cyclictest1892067-21awk10:05:270
1861221995413,33cyclictest1876974-21latency_hist08:40:020
186122499534,16cyclictest1872737-21/usr/sbin/munin08:15:201
186122499530,24cyclictest0-21swapper/107:55:011
1861221995329,20cyclictest0-21swapper/007:20:250
186122599521,18cyclictest30-21rcuc/209:05:012
186122199523,42cyclictest1869064-21grep07:50:280
186122199522,9cyclictest1881030-21grep09:00:290
186122199522,6cyclictest1882685-21tail09:10:280
1861221995220,27cyclictest0-21swapper/008:45:280
1861221995219,29cyclictest1884435-21sed09:20:280
1861221995216,32cyclictest1873107-21grep08:15:270
186122199521,49cyclictest1902281-21apt-get11:10:050
1861225995143,5cyclictest311ktimers/209:55:002
1861225995143,4cyclictest1867395-21munin-plugin-st07:44:592
1861224995140,8cyclictest1283-21cron07:55:001
1861224995131,16cyclictest0-21swapper/110:25:001
186122199513,5cyclictest1913480-21grep12:10:290
1861221995130,16cyclictest20650irq/252-8000000.ethernet07:10:280
186122199512,3cyclictest1879271-21users08:50:260
186122199512,16cyclictest1899946-21apt-get10:55:160
186122199512,11cyclictest1875040-21sed08:25:300
1861225995041,5cyclictest1868232-21munin-plugin-st07:50:002
1861224995033,12cyclictest0-21swapper/111:00:291
186122499501,25cyclictest1891510-21/usr/sbin/munin10:05:181
1861224995010,26cyclictest0-21swapper/107:30:011
186122199502,9cyclictest1892487-21tune2fs10:10:180
1861221995029,16cyclictest0-21swapper/010:50:260
186122199501,4cyclictest0-21swapper/011:35:260
186122199501,4cyclictest0-21swapper/011:35:250
1861224994931,13cyclictest0-21swapper/110:40:181
186122499491,31cyclictest0-21swapper/111:15:011
186122199494,40cyclictest0-21swapper/010:40:000
1861221994924,23cyclictest0-21swapper/007:35:160
186122199492,39cyclictest0-21swapper/007:30:000
186122199492,11cyclictest1660-21snmpd10:20:220
186122199491,12cyclictest1911636-21grep12:00:270
1861225994829,15cyclictest311ktimers/211:50:112
186122499482,25cyclictest0-21swapper/110:20:021
186122499482,25cyclictest0-21swapper/110:20:021
186122199482,8cyclictest1890002-21fschecks_time09:55:220
1861221994816,29cyclictest1898680-21ptp4l10:45:260
1861221994814,25cyclictest1859165-1kworker/0:1H+kblockd07:45:010
1861224994734,9cyclictest0-21swapper/108:05:281
1861224994734,9cyclictest0-21swapper/108:05:281
1861224994731,12cyclictest0-21swapper/111:55:011
1861221994731,13cyclictest0-21swapper/011:30:100
1861221994725,18cyclictest1886273-21latency_hist09:35:000
186122199471,44cyclictest1881436-21fschecks_time09:05:210
1861225994640,3cyclictest30-21rcuc/207:10:022
1861225994635,7cyclictest0-21swapper/210:00:242
186122499462,4cyclictest0-21swapper/111:45:011
186122199462,9cyclictest1891451-21latency_hist10:05:010
186122199461,5cyclictest1889312-21cut09:50:260
186122199461,12cyclictest1897492-21dropbear10:40:160
186122199461,11cyclictest1871227-21cut08:05:190
186122199461,11cyclictest1871227-21cut08:05:190
186122199461,10cyclictest1865167-21tune2fs07:30:210
186122599451,8cyclictest0-21swapper/211:30:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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