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2026-07-22 - 20:43

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 Jul 22, 2026 12:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
80200299813,23cyclictest837238-21/usr/sbin/munin10:35:192
801999997141,26cyclictest0-21swapper/107:15:001
80200299631,31cyclictest0-21swapper/211:05:002
801998996221,11cyclictest0-21swapper/008:45:010
802002995736,14cyclictest32-21ksoftirqd/207:50:202
802002995534,18cyclictest30-21rcuc/208:00:022
802002995534,18cyclictest30-21rcuc/208:00:022
801998995523,3cyclictest0-21swapper/008:20:010
80199899541,51cyclictest0-21swapper/012:15:120
80199899533,4cyclictest820820-21munin-run09:00:000
80199899530,13cyclictest0-21swapper/008:30:020
80200299528,30cyclictest32-21ksoftirqd/210:05:022
80199899529,5cyclictest0-21swapper/009:40:200
801998995246,4cyclictest0-21swapper/009:05:050
80200299514,13cyclictest30-21rcuc/209:50:012
80200299511,25cyclictest0-21swapper/211:55:002
801999995143,5cyclictest231ktimers/110:00:011
80199999511,37cyclictest856445-21unixbench_multi12:25:281
80199899513,44cyclictest0-21swapper/010:00:000
80199899511,41cyclictest0-21swapper/007:55:170
80199899511,41cyclictest0-21swapper/007:55:170
802002995040,7cyclictest856554-21munin-plugin-st12:30:002
801999995037,8cyclictest858262-21apt-key12:40:011
801998995043,4cyclictest167350irq/118-8000000.ethernet-tx010:40:180
801998995036,6cyclictest0-21swapper/009:05:020
801998995018,28cyclictest12-21ksoftirqd/010:50:010
801998995017,10cyclictest845492-21apt-get11:25:010
80199899494,33cyclictest20850irq/208-8000000.ethernet09:00:010
801998994941,4cyclictest167350irq/118-8000000.ethernet-tx008:35:250
801998994941,4cyclictest167350irq/118-8000000.ethernet-tx008:35:250
801998994915,29cyclictest0-21swapper/009:15:010
802002994835,9cyclictest805632-21munin-plugin-st07:30:002
801999994838,6cyclictest836093-21grep10:25:281
80199999476,4cyclictest0-21swapper/108:50:011
801999994736,8cyclictest826821-21munin-plugin-st09:35:001
801999994735,7cyclictest810634-21grep07:55:321
801999994735,7cyclictest810634-21grep07:55:321
801999994734,9cyclictest0-21swapper/112:04:591
801998994739,4cyclictest12-21ksoftirqd/011:55:220
801998994737,6cyclictest14-21rcu_preempt08:15:010
80199899472,39cyclictest15-21rcuc/007:45:020
80199899471,7cyclictest0-21swapper/010:30:010
80199899471,42cyclictest829670-21fschecks_count09:50:170
802002994629,12cyclictest0-21swapper/211:15:012
80199999464,17cyclictest22-21rcuc/112:25:011
801999994634,7cyclictest830196-21munin-plugin-st09:55:001
801999994633,7cyclictest0-21swapper/108:10:291
80199899466,34cyclictest0-21swapper/010:15:120
801998994639,4cyclictest167350irq/118-8000000.ethernet-tx011:50:010
801998994637,6cyclictest826749-21grep09:30:300
80199899462,8cyclictest827083-21df_inode09:35:190
80199899462,8cyclictest827083-21df_inode09:35:190
80199899461,42cyclictest843705-21sed11:10:290
801998994611,31cyclictest0-21swapper/008:20:290
801999994530,6cyclictest0-21swapper/111:40:281
80199999451,8cyclictest0-21swapper/108:10:011
80199999451,6cyclictest0-21swapper/108:40:011
80199999451,6cyclictest0-21swapper/108:40:001
80199899451,42cyclictest0-21swapper/012:20:200
80199899451,38cyclictest0-21swapper/010:10:010
802002994415,6cyclictest0-21swapper/210:50:012
80199899445,3cyclictest831412-21diskstats10:00:190
801998994437,4cyclictest167350irq/118-8000000.ethernet-tx007:20:220
801998994432,5cyclictest852233-21grep12:00:310
80199899442,39cyclictest839971-21sh10:50:220
801998994414,7cyclictest12-21ksoftirqd/012:40:010
802002994336,5cyclictest0-21swapper/211:40:012
80200299432,26cyclictest32-21ksoftirqd/208:35:202
80200299432,26cyclictest32-21ksoftirqd/208:35:202
801999994331,8cyclictest0-21swapper/109:05:011
801999994331,8cyclictest0-21swapper/109:05:001
80199999431,3cyclictest853952-21unixbench_singl12:10:291
80199999431,3cyclictest853952-21unixbench_singl12:10:291
801998994336,4cyclictest0-21swapper/010:55:160
801998994333,7cyclictest0-21swapper/010:10:180
801998994314,4cyclictest12-21ksoftirqd/011:40:280
80199899431,35cyclictest0-21swapper/008:35:010
802002994232,7cyclictest834463-21grep10:15:282
802002994232,6cyclictest854764-21grep12:15:292
802002994231,5cyclictest0-21swapper/211:25:272
802002994211,25cyclictest0-21swapper/210:50:252
80199899425,35cyclictest0-21swapper/007:50:170
80199899422,5cyclictest850637-21munin-run11:55:000
80199899422,3cyclictest0-21swapper/012:30:260
802002994131,5cyclictest0-21swapper/207:45:202
802002994130,8cyclictest311ktimers/208:15:272
802002994130,7cyclictest0-21swapper/210:10:282
802002994123,10cyclictest0-21swapper/209:20:002
801999994127,11cyclictest820822-21munin-plugin-st09:00:001
80199999411,32cyclictest0-21swapper/107:15:301
80199999411,32cyclictest0-21swapper/107:15:301
801998994135,3cyclictest167350irq/118-8000000.ethernet-tx011:30:190
801998994135,3cyclictest0-21swapper/007:10:270
801998994134,3cyclictest0-21swapper/011:15:270
801998994133,6cyclictest806464-21cron07:35:010
801998994133,6cyclictest806464-21cron07:35:010
801998994133,4cyclictest20650irq/252-8000000.ethernet10:35:220
801998994127,10cyclictest0-21swapper/009:20:000
80199899412,5cyclictest1660-21snmpd09:47:400
80199899412,4cyclictest810969-21df_inode08:00:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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