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2025-12-28 - 22:40

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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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 50 highest latencies:
System rackeslot6s.osadl.org (updated Sun Dec 28, 2025 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3144684998212,19cyclictest3165590-21/usr/sbin/munin09:10:191
3144684998212,19cyclictest3165590-21/usr/sbin/munin09:10:191
3144681997029,35cyclictest20650irq/252-8000000.ethernet08:15:120
3144681996965,2cyclictest0-21swapper/008:05:000
3144685996233,16cyclictest311ktimers/210:05:142
314468599604,18cyclictest0-21swapper/209:55:012
3144685995339,9cyclictest0-21swapper/207:15:302
3144685995232,15cyclictest311ktimers/212:30:142
3144685995225,15cyclictest311ktimers/209:20:132
314468599522,21cyclictest32-21ksoftirqd/207:10:012
314468199528,14cyclictest0-21swapper/011:40:010
3144681995235,12cyclictest3160205-21unixbench_multi08:35:300
3144685995138,8cyclictest3168775-21munin-plugin-st09:30:002
3144685995138,8cyclictest3168775-21munin-plugin-st09:30:002
3144685995138,8cyclictest0-21swapper/207:55:292
3144685995132,11cyclictest311ktimers/208:55:112
3144685995132,11cyclictest311ktimers/208:55:102
314468199518,13cyclictest14-21rcu_preempt09:00:010
314468199518,13cyclictest14-21rcu_preempt09:00:010
3144685995041,5cyclictest3185095-21munin-plugin-st11:05:012
3144685995033,12cyclictest311ktimers/208:50:122
314468499503,19cyclictest0-21swapper/109:40:001
3144685994934,11cyclictest311ktimers/211:15:122
314468199495,7cyclictest0-21swapper/010:20:020
314468199495,7cyclictest0-21swapper/010:20:010
3144685994830,13cyclictest311ktimers/207:45:122
3144685994830,13cyclictest311ktimers/207:45:122
3144685994817,17cyclictest30-21rcuc/211:10:012
3144685994817,17cyclictest30-21rcuc/211:10:002
3144684994836,8cyclictest3183397-21munin-plugin-st10:55:001
3144684994836,8cyclictest3183397-21munin-plugin-st10:55:001
3144684994836,8cyclictest0-21swapper/111:20:271
3144684994836,8cyclictest0-21swapper/111:20:271
3144681994843,3cyclictest0-21swapper/012:25:140
3144681994842,3cyclictest3157461-21open_inodes08:20:260
3144681994839,5cyclictest167350irq/118-8000000.ethernet-tx009:40:170
314468199482,4cyclictest3169487-21xargs09:30:300
314468199482,44cyclictest0-21swapper/007:20:280
3144685994738,4cyclictest3171316-21munin-plugin-st09:45:002
3144685994729,13cyclictest311ktimers/208:05:132
3144685994725,18cyclictest311ktimers/212:20:122
314468199475,40cyclictest131ktimers/012:00:010
314468199475,40cyclictest131ktimers/012:00:000
3144685994630,11cyclictest311ktimers/210:10:162
314468499461,38cyclictest3173063-21unixbench_multi09:50:281
3144681994637,5cyclictest0-21swapper/007:55:010
3144681994634,8cyclictest3145382-21grep07:10:280
3144685994533,7cyclictest0-21swapper/211:10:272
3144685994526,14cyclictest311ktimers/209:55:142
3144685994524,14cyclictest311ktimers/212:25:172
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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