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2026-09-17 - 21:58

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 Thu Sep 17, 2026 12:44:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
69334299129122,5cyclictest131ktimers/008:05:180
693346998257,20cyclictest311ktimers/210:23:262
693345996820,9cyclictest0-21swapper/112:25:021
693342996843,20cyclictest131ktimers/010:23:250
693346996715,11cyclictest735400-21apt-get11:10:022
693345996746,14cyclictest231ktimers/107:55:121
693346996123,21cyclictest311ktimers/211:50:002
693345996010,40cyclictest0-21swapper/110:23:251
693346995931,21cyclictest14-21rcu_preempt09:35:012
693346995513,17cyclictest727875-21/usr/sbin/munin10:25:192
69334299554,46cyclictest724370-21grep10:05:290
69334299554,46cyclictest724370-21grep10:05:290
693346995434,13cyclictest311ktimers/209:40:122
693346995345,5cyclictest733709-21sendmail10:59:592
693345995337,7cyclictest0-21swapper/110:45:201
693346995237,10cyclictest0-21swapper/211:25:012
693342995248,2cyclictest0-21swapper/007:15:100
69334299521,10cyclictest735212-21/usr/sbin/munin11:05:280
69334599511,23cyclictest694317-21memory07:15:021
693346995030,14cyclictest311ktimers/212:15:142
693346995029,14cyclictest0-21swapper/207:40:192
693345995031,13cyclictest231ktimers/112:30:111
693346994929,12cyclictest311ktimers/212:05:152
693346994928,13cyclictest311ktimers/211:50:152
693346994928,13cyclictest311ktimers/211:50:152
69334299494,28cyclictest715250-21/usr/sbin/munin09:15:190
693342994940,5cyclictest167350irq/118-8000000.ethernet-tx008:50:010
693346994826,14cyclictest311ktimers/207:25:112
693342994840,5cyclictest131ktimers/011:40:290
693345994737,6cyclictest0-21swapper/107:40:001
69334299471,40cyclictest0-21swapper/012:40:020
69334299471,34cyclictest20850irq/208-8000000.ethernet08:40:000
693346994612,5cyclictest702117-21apt-get08:00:012
69334699461,22cyclictest0-21swapper/207:15:022
693345994637,5cyclictest231ktimers/108:45:271
693342994639,4cyclictest711586-21munin-plugin-st08:55:000
693342994634,9cyclictest0-21swapper/009:09:590
693342994634,8cyclictest131ktimers/010:30:110
693346994523,13cyclictest311ktimers/212:00:112
693346994514,8cyclictest721807-21apt-get09:55:022
693345994535,6cyclictest743077-21grep11:50:291
693345994535,6cyclictest743077-21grep11:50:291
693345994533,7cyclictest724319-21unixbench_multi10:05:291
693345994533,7cyclictest724319-21unixbench_multi10:05:281
693345994529,10cyclictest0-21swapper/109:40:001
693342994538,4cyclictest167350irq/118-8000000.ethernet-tx012:05:180
693346994431,8cyclictest0-21swapper/207:25:002
693346994428,12cyclictest311ktimers/209:05:122
693346994424,11cyclictest0-21swapper/211:15:292
69334699441,6cyclictest0-21swapper/208:20:222
69334699441,32cyclictest30-21rcuc/207:40:022
693345994435,6cyclictest730209-21sendmail10:40:011
693345994420,13cyclictest0-21swapper/108:40:311
693345994420,13cyclictest0-21swapper/108:40:301
693342994437,4cyclictest167350irq/118-8000000.ethernet-tx007:35:240
69334299441,36cyclictest716930-21latency_hist09:25:020
693346994334,5cyclictest0-21swapper/210:40:012
693345994335,4cyclictest167450irq/126-8000000.ethernet-tx111:59:591
693345994329,9cyclictest728453-21grep10:25:271
69334599432,34cyclictest0-21swapper/109:23:231
693345994322,12cyclictest0-21swapper/112:10:281
693342994336,4cyclictest167350irq/118-8000000.ethernet-tx009:40:180
69334299432,4cyclictest733601-21grep10:55:280
69334299431,2cyclictest0-21swapper/010:20:010
69334299431,2cyclictest0-21swapper/008:30:010
693346994227,10cyclictest311ktimers/210:50:142
693346994227,10cyclictest311ktimers/210:50:142
693346994214,15cyclictest311ktimers/208:40:152
693346994214,15cyclictest311ktimers/208:40:152
69334599424,8cyclictest0-21swapper/109:35:011
693345994231,5cyclictest0-21swapper/109:55:021
693345994228,8cyclictest0-21swapper/108:10:271
693345994214,4cyclictest0-21swapper/107:13:191
693342994236,3cyclictest167350irq/118-8000000.ethernet-tx008:30:100
693342994235,4cyclictest167350irq/118-8000000.ethernet-tx010:40:020
69334299422,38cyclictest0-21swapper/007:50:130
69334299421,5cyclictest747909-21meminfo12:20:240
69334299421,5cyclictest722050-21sed09:55:010
69334299421,38cyclictest0-21swapper/009:30:210
693346994122,12cyclictest311ktimers/208:15:122
693345994112,23cyclictest0-21swapper/111:06:211
69334299415,4cyclictest0-21swapper/009:00:010
693342994134,4cyclictest723596-21munin-plugin-st10:05:000
693342994133,5cyclictest0-21swapper/011:45:220
693342994131,7cyclictest0-21swapper/011:55:170
69334299412,5cyclictest702584-21sh08:00:190
693342994124,14cyclictest0-21swapper/007:40:220
69334299412,36cyclictest0-21swapper/010:10:250
69334299411,4cyclictest702120-21munin-run08:00:010
69334299411,38cyclictest0-21swapper/011:15:150
693346994031,6cyclictest0-21swapper/210:30:302
693346994027,9cyclictest0-21swapper/212:00:002
693346994027,8cyclictest0-21swapper/211:40:272
693346994024,7cyclictest0-21swapper/208:30:282
693345994031,5cyclictest0-21swapper/109:05:281
693345994030,5cyclictest0-21swapper/111:15:201
693345994030,5cyclictest0-21swapper/107:40:261
693345994019,13cyclictest0-21swapper/110:20:011
693345994018,2cyclictest0-21swapper/108:55:001
693345994014,9cyclictest702421-21/usr/sbin/munin08:00:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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