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2026-06-07 - 20:46

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot1s.osadl.org (updated Sun Jun 07, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3193621380,2sleep031941-21gltestperf08:23:010
3193621380,2sleep031941-21gltestperf08:23:010
570221170,3sleep30-21swapper/308:38:073
570221170,3sleep30-21swapper/308:38:073
990321060,3sleep30-21swapper/307:23:063
990321060,3sleep30-21swapper/307:23:063
139972860,1sleep3431rcuc/311:53:013
139972860,1sleep3431rcuc/311:53:013
271192680,2chrt27122-21sed12:28:001
101372640,9sleep1281ktimers/107:23:081
101372640,9sleep1281ktimers/107:23:081
547199551,3cyclictest700-21192.168.115.40-manager10:48:120
547199551,3cyclictest700-21192.168.115.40-manager10:48:120
547199551,3cyclictest700-21192.168.115.40-manager10:48:120
101912530,3sleep20-21swapper/210:18:002
280562510,3sleep10-21swapper/109:38:071
280562510,3sleep10-21swapper/109:38:071
280562510,3sleep10-21swapper/109:38:071
135982510,1chrt13597-21ntpq07:33:051
547199500,3cyclictest700-21192.168.115.40-manager09:35:400
547199500,3cyclictest700-21192.168.115.40-manager09:35:400
547199491,30cyclictest8124-21fschecks_time10:12:580
547199491,30cyclictest8124-21fschecks_time10:12:580
547199491,30cyclictest8124-21fschecks_time10:12:580
547199491,1cyclictest0-21swapper/009:53:410
547199491,1cyclictest0-21swapper/009:53:410
547199481,29cyclictest17489-21df_inode10:37:590
547199480,2cyclictest700-21192.168.115.40-manager07:34:420
547199470,2cyclictest700-21192.168.115.40-manager11:29:130
547199470,2cyclictest700-21192.168.115.40-manager11:29:130
547199470,2cyclictest700-21192.168.115.40-manager09:00:240
547199461,31cyclictest31291-21taskset08:22:240
547199461,31cyclictest31291-21taskset08:22:240
547199461,28cyclictest23148-21taskset09:25:190
547199461,28cyclictest23148-21taskset09:25:190
547199460,44cyclictest700-21192.168.115.40-manager08:29:080
547199460,44cyclictest700-21192.168.115.40-manager08:29:080
547199460,3cyclictest700-21192.168.115.40-manager10:18:410
547199460,3cyclictest700-21192.168.115.40-manager10:18:410
547199460,3cyclictest700-21192.168.115.40-manager10:18:410
547199460,31cyclictest24358-21taskset10:54:240
547199460,31cyclictest24358-21taskset10:54:240
547199460,2cyclictest700-21192.168.115.40-manager10:24:420
547199460,2cyclictest700-21192.168.115.40-manager10:24:420
547199460,2cyclictest700-21192.168.115.40-manager10:24:420
547199451,42cyclictest700-21192.168.115.40-manager10:35:120
547199451,42cyclictest700-21192.168.115.40-manager10:35:120
547199451,31cyclictest15278-21runrttasks10:32:420
547199451,31cyclictest15278-21runrttasks10:32:420
547199451,31cyclictest13143-21chrt11:49:000
547199451,31cyclictest13143-21chrt11:49:000
547199451,31cyclictest13143-21chrt11:49:000
547199451,30cyclictest2084-21taskset11:21:500
547199450,4cyclictest700-21192.168.115.40-manager11:17:130
547199450,4cyclictest700-21192.168.115.40-manager11:17:130
547199450,4cyclictest700-21192.168.115.40-manager07:31:220
547199450,4cyclictest700-21192.168.115.40-manager07:31:220
547199450,3cyclictest700-21192.168.115.40-manager10:43:120
547199450,3cyclictest700-21192.168.115.40-manager10:43:120
547199450,32cyclictest6158-21runrttasks08:39:370
547199450,32cyclictest6158-21runrttasks08:39:370
547199450,30cyclictest17961-21seq07:43:570
547199450,30cyclictest17961-21seq07:43:570
547199450,2cyclictest700-21192.168.115.40-manager12:21:440
547199450,2cyclictest700-21192.168.115.40-manager12:21:440
547199450,2cyclictest700-21192.168.115.40-manager12:21:440
547199450,2cyclictest700-21192.168.115.40-manager12:15:150
547199450,2cyclictest700-21192.168.115.40-manager12:15:150
547199450,2cyclictest700-21192.168.115.40-manager12:15:150
547199450,2cyclictest700-21192.168.115.40-manager09:29:100
547199450,2cyclictest700-21192.168.115.40-manager09:29:100
547199450,2cyclictest700-21192.168.115.40-manager09:29:100
547199441,40cyclictest29826-21unixbench_multi11:08:110
547199441,40cyclictest29826-21unixbench_multi11:08:110
547199441,40cyclictest29826-21unixbench_multi11:08:110
547199441,30cyclictest11429-21taskset11:45:570
547199441,30cyclictest11429-21taskset11:45:570
547199441,30cyclictest11429-21taskset11:45:570
547199441,29cyclictest26271-21seq11:00:070
547199441,29cyclictest26271-21seq11:00:070
547199440,4cyclictest700-21192.168.115.40-manager12:38:150
547199440,4cyclictest700-21192.168.115.40-manager12:38:150
547199440,3cyclictest700-21192.168.115.40-manager10:13:110
547199440,3cyclictest700-21192.168.115.40-manager10:13:110
547199440,31cyclictest21846-21seq07:56:030
547199440,31cyclictest21846-21seq07:56:030
547199440,2cyclictest700-21192.168.115.40-manager12:24:150
547199440,2cyclictest700-21192.168.115.40-manager12:24:150
547199440,2cyclictest700-21192.168.115.40-manager11:24:280
547199440,2cyclictest700-21192.168.115.40-manager11:24:280
547199440,2cyclictest700-21192.168.115.40-manager11:24:280
547199440,2cyclictest700-21192.168.115.40-manager07:42:160
547199440,2cyclictest700-21192.168.115.40-manager07:42:160
547199431,40cyclictest700-21192.168.115.40-manager10:06:410
547199431,40cyclictest700-21192.168.115.40-manager10:06:410
547199431,28cyclictest32487-21chrt09:50:240
547199431,28cyclictest32487-21chrt09:50:240
547199431,28cyclictest32487-21chrt09:50:240
547199431,26cyclictest17608-21chrt09:11:570
547199431,26cyclictest17608-21chrt09:11:570
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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