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2026-07-22 - 18:39

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 792 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
80199899410,37cyclictest834917-21cut10:20:210
802002994032,4cyclictest0-21swapper/207:10:262
802002994028,8cyclictest0-21swapper/208:40:282
80199899409,3cyclictest0-21swapper/008:55:010
80200299397,26cyclictest0-21swapper/209:53:202
802002993925,10cyclictest311ktimers/211:55:172
802002993916,15cyclictest30-21rcuc/212:40:012
801999993930,5cyclictest0-21swapper/110:40:301
801999993929,5cyclictest0-21swapper/110:20:281
801999993926,6cyclictest831929-21grep10:00:301
801999993923,8cyclictest0-21swapper/112:05:221
801999993922,10cyclictest0-21swapper/109:40:011
801999993922,10cyclictest0-21swapper/109:40:011
80199999391,31cyclictest822249-21kernelversion09:05:251
80199899393,29cyclictest15-21rcuc/011:05:010
801998993932,4cyclictest20850irq/208-8000000.ethernet07:20:000
801998993932,4cyclictest20850irq/208-8000000.ethernet07:20:000
801998993932,3cyclictest805294-21memory07:25:260
801998993928,8cyclictest15-21rcuc/011:05:170
80199899391,36cyclictest0-21swapper/008:41:440
80199899391,2cyclictest0-21swapper/009:30:010
802002993830,5cyclictest842886-21unixbench_singl11:05:292
802002993830,5cyclictest825982-21munin-plugin-st09:30:012
802002993828,6cyclictest820736-21grep08:55:302
802002993828,6cyclictest0-21swapper/212:30:282
801999993833,2cyclictest0-21swapper/110:05:241
801999993827,5cyclictest0-21swapper/111:10:211
801999993826,7cyclictest854765-21grep12:15:291
801999993825,9cyclictest0-21swapper/107:35:201
80199899384,30cyclictest856473-21unixbench_multi12:25:280
80199899381,35cyclictest0-21swapper/011:25:170
801998993810,3cyclictest806968-21meminfo07:35:250
80199899380,19cyclictest844290-1kworker/0:2H+kblockd12:15:000
80199899380,19cyclictest844290-1kworker/0:2H+kblockd12:15:000
802002993729,5cyclictest0-21swapper/212:20:162
802002993728,5cyclictest311ktimers/211:15:162
802002993727,6cyclictest0-21swapper/210:05:292
802002993726,8cyclictest311ktimers/209:05:262
802002993721,8cyclictest0-21swapper/212:00:312
802002993719,9cyclictest0-21swapper/209:35:212
802002993719,9cyclictest0-21swapper/209:35:212
80200299371,29cyclictest0-21swapper/211:25:012
80199999373,12cyclictest845492-21apt-get11:25:021
801999993727,7cyclictest815122-21/usr/sbin/munin08:25:211
801999993722,8cyclictest0-21swapper/111:00:291
80199999372,28cyclictest0-21swapper/107:40:291
80199999371,30cyclictest808899-21unixbench_multi07:45:301
80199999371,29cyclictest0-21swapper/107:25:291
80199899378,3cyclictest15-21rcuc/011:40:010
801998993730,4cyclictest20850irq/208-8000000.ethernet08:05:240
801998993728,5cyclictest0-21swapper/007:45:210
802002993628,5cyclictest311ktimers/209:40:192
802002993628,5cyclictest311ktimers/208:45:122
802002993627,6cyclictest311ktimers/209:20:132
802002993626,6cyclictest808132-21grep07:40:302
802002993623,5cyclictest0-21swapper/211:45:282
802002993622,9cyclictest0-21swapper/207:20:262
802002993619,9cyclictest0-21swapper/209:30:272
802002993617,8cyclictest803286-21/usr/sbin/munin07:15:202
802002993617,8cyclictest803286-21/usr/sbin/munin07:15:202
802002993613,16cyclictest167550irq/134-8000000.ethernet-tx208:50:142
80199999363,27cyclictest0-21swapper/111:15:231
801999993628,4cyclictest0-21swapper/111:45:291
801999993626,7cyclictest0-21swapper/108:00:301
80199899361,33cyclictest0-21swapper/012:06:330
80199899361,33cyclictest0-21swapper/009:20:220
802002993527,5cyclictest311ktimers/208:30:312
802002993527,4cyclictest0-21swapper/212:05:302
802002993526,6cyclictest1660-21snmpd09:13:262
802002993525,6cyclictest853933-21grep12:10:292
802002993525,6cyclictest853933-21grep12:10:292
80200299352,14cyclictest0-21swapper/208:05:012
802002993517,4cyclictest829330-21kworker/u8:0-events_freezable_power_10:20:102
801999993527,5cyclictest167450irq/126-8000000.ethernet-tx108:20:241
801999993521,9cyclictest0-21swapper/108:35:001
802002993427,5cyclictest311ktimers/208:05:282
802002993427,4cyclictest311ktimers/207:35:112
802002993423,6cyclictest311ktimers/210:00:002
802002993422,7cyclictest311ktimers/208:25:162
80200299341,5cyclictest32-21ksoftirqd/208:15:012
801999993427,4cyclictest167450irq/126-8000000.ethernet-tx111:55:291
801999993425,6cyclictest0-21swapper/109:45:281
80199999342,4cyclictest0-21swapper/108:15:301
80199999341,2cyclictest0-21swapper/109:30:021
802002993329,2cyclictest0-21swapper/211:40:282
80200299332,7cyclictest0-21swapper/209:01:222
80200299332,7cyclictest0-21swapper/209:01:222
802002993325,6cyclictest311ktimers/207:10:022
802002993324,5cyclictest847204-21grep11:30:282
80199999333,4cyclictest0-21swapper/110:15:011
801999993326,4cyclictest833949-21fschecks_count10:15:191
801999993326,4cyclictest0-21swapper/109:20:311
802002993226,4cyclictest311ktimers/210:45:022
802002993225,3cyclictest2-21kthreadd10:31:212
802002993221,8cyclictest836139-21grep10:25:302
802002993221,7cyclictest311ktimers/208:20:162
80199999321,2cyclictest0-21swapper/107:25:011
80199999321,24cyclictest840673-21dropbear10:55:181
80199999320,2cyclictest0-21swapper/110:55:011
80199899321,5cyclictest836471-21diskstats10:30:180
802002993122,5cyclictest0-21swapper/207:30:192
802002993122,5cyclictest0-21swapper/207:30:192
801999993121,5cyclictest0-21swapper/112:30:261
801999993120,9cyclictest0-21swapper/107:30:251
801999993120,9cyclictest0-21swapper/107:30:251
801999993120,8cyclictest0-21swapper/108:40:191
801999993120,6cyclictest0-21swapper/108:50:271
801999993115,10cyclictest0-21swapper/109:45:001
80199999311,27cyclictest850574-21unixbench_singl11:50:311
80199899315,21cyclictest15-21rcuc/007:10:020
802002993021,4cyclictest311ktimers/210:55:292
801999993018,8cyclictest0-21swapper/110:30:191
801999993016,9cyclictest0-21swapper/111:05:191
801999992919,7cyclictest0-21swapper/109:15:301
801999992917,8cyclictest0-21swapper/107:55:001
801999992916,9cyclictest0-21swapper/111:25:201
801999992517,5cyclictest0-21swapper/110:35:201
801999992514,7cyclictest0-21swapper/109:10:261
80199999251,22cyclictest0-21swapper/111:31:261
80199999251,22cyclictest0-21swapper/110:46:251
801999992315,6cyclictest0-21swapper/111:35:221
801999992213,5cyclictest0-21swapper/107:10:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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