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2026-07-05 - 01:18

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 04, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1698351999875,20cyclictest391ktimers/310:55:013
1698349997513,22cyclictest1750760-21/usr/sbin/munin12:15:182
1698349997513,22cyclictest1750760-21/usr/sbin/munin12:15:182
1698349996734,27cyclictest0-21swapper/212:05:012
169834699667,19cyclictest1703652-21apt-get07:40:021
169834699667,19cyclictest1703652-21apt-get07:40:011
169834999625,46cyclictest1712145-21grep08:25:292
1698349996122,32cyclictest0-21swapper/207:10:332
1698349996121,33cyclictest0-21swapper/209:50:282
1698349996121,33cyclictest0-21swapper/209:50:282
1698349996024,30cyclictest0-21swapper/208:40:302
169834999574,43cyclictest0-21swapper/211:50:212
1698349995732,19cyclictest0-21swapper/211:45:292
169834999573,11cyclictest1735842-21grep10:45:292
169834999572,46cyclictest1716321-21grep08:50:292
1698349995615,33cyclictest0-21swapper/211:20:002
1698349995614,34cyclictest0-21swapper/212:10:222
169834699562,38cyclictest22-21rcuc/107:55:011
1698345995645,9cyclictest1747938-21sendmail12:00:000
169834999553,44cyclictest1702770-21unixbench_singl07:30:282
1698349995513,34cyclictest0-21swapper/210:10:282
169834999543,39cyclictest1751957-21phc2sys12:20:252
1698349995414,25cyclictest1742772-21kworker/u8:4+flush-179:9611:40:052
1698345995432,19cyclictest0-21swapper/009:20:190
169834999538,36cyclictest0-21swapper/208:35:262
169834999538,35cyclictest0-21swapper/211:25:022
169834999534,38cyclictest1707113-21cron08:00:002
169834999533,42cyclictest1700166-21sed07:15:302
169834999532,5cyclictest1724848-21users09:40:292
1698349995323,25cyclictest1719708-21grep09:10:292
1698349995323,25cyclictest1719708-21grep09:10:292
1698349995322,28cyclictest0-21swapper/210:15:122
169834999531,9cyclictest1729055-21/usr/sbin/munin10:05:282
1698349995317,29cyclictest0-21swapper/209:25:192
1698349995315,29cyclictest0-21swapper/207:40:232
1698349995315,29cyclictest0-21swapper/207:40:232
1698345995340,10cyclictest1717259-21sendmail09:00:000
169834999529,34cyclictest0-21swapper/210:20:282
169834999525,37cyclictest0-21swapper/212:35:282
169834999525,37cyclictest0-21swapper/212:35:282
169834999524,38cyclictest0-21swapper/210:30:192
169834999524,38cyclictest0-21swapper/210:30:192
169834999523,39cyclictest1707860-21grep08:00:312
169834999522,7cyclictest1725588-21/usr/sbin/munin09:45:272
1698349995221,24cyclictest0-21swapper/208:05:282
1698349995218,27cyclictest0-21swapper/209:35:282
1698345995247,4cyclictest0-21swapper/007:50:190
1698345995244,5cyclictest1729183-21munin-plugin-st10:10:000
169834999516,36cyclictest0-21swapper/211:35:292
169834999515,38cyclictest1706221-21grep07:50:282
169834999515,37cyclictest0-21swapper/210:00:252
169834999515,35cyclictest1718028-21grep09:00:292
169834999514,38cyclictest1737543-21grep10:55:292
169834999513,38cyclictest1753014-21grep12:25:302
169834999512,40cyclictest1739225-21grep11:05:292
169834999511,8cyclictest1736464-21/usr/sbin/munin10:50:252
1698349995117,25cyclictest0-21swapper/208:10:272
1698349995115,28cyclictest0-21swapper/208:30:312
169834999511,44cyclictest0-21swapper/211:25:282
169834599512,45cyclictest1720167-21lsblk09:15:200
169834999505,37cyclictest1703616-21unixbench_singl07:35:292
169834999505,37cyclictest1703616-21unixbench_singl07:35:292
169834999504,37cyclictest0-21swapper/210:25:292
169834999503,14cyclictest1722969-21cut09:30:272
1698349995027,17cyclictest0-21swapper/207:45:212
1698349995020,22cyclictest0-21swapper/209:05:262
169834999501,5cyclictest1710952-21/usr/sbin/munin08:20:242
169834999501,10cyclictest1749480-21/usr/sbin/munin12:05:262
169834999498,35cyclictest0-21swapper/208:20:012
169834999495,36cyclictest1720535-21grep09:15:272
169834999493,4cyclictest1738255-21ptp4l11:00:272
169834999493,4cyclictest1721187-21phc2sys09:20:262
1698349994925,19cyclictest0-21swapper/211:10:232
169834999491,9cyclictest1715346-21cut08:45:272
169834999491,9cyclictest1715346-21cut08:45:262
169834999491,11cyclictest1700826-21tail07:20:252
169834599494,9cyclictest0-21swapper/011:05:010
169834999483,37cyclictest1717135-21grep08:55:292
169834999482,5cyclictest1753371-21diskstats12:30:182
169834999482,40cyclictest1701923-21unixbench_singl07:25:302
169834999482,40cyclictest1701923-21unixbench_singl07:25:302
169834999481,9cyclictest1747733-21/usr/sbin/munin11:55:292
169834999481,8cyclictest1734762-21/usr/sbin/munin10:40:252
169834999481,4cyclictest1734060-21/usr/sbin/munin10:35:292
169834999472,38cyclictest1727382-21grep09:55:292
1698345994741,4cyclictest1713881-21sendmail08:40:010
1698345994739,4cyclictest167350irq/118-8000000.ethernet-tx010:25:280
169834599464,5cyclictest0-21swapper/009:35:010
1698345994639,4cyclictest167350irq/118-8000000.ethernet-tx011:20:210
1698345994639,4cyclictest167350irq/118-8000000.ethernet-tx007:20:270
169834599462,6cyclictest0-21swapper/007:35:150
169834599462,6cyclictest0-21swapper/007:35:150
169834599462,40cyclictest1715932-21lsblk08:50:210
169834999451,7cyclictest1743055-21df_inode11:30:182
1698346994532,8cyclictest0-21swapper/110:50:281
1698345994531,10cyclictest0-21swapper/012:05:010
169834599452,40cyclictest1727284-21rt-features09:55:270
1698346994431,8cyclictest0-21swapper/108:20:301
1698346994429,11cyclictest1734247-21sendmail10:40:001
1698345994337,3cyclictest167350irq/118-8000000.ethernet-tx012:15:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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