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2025-12-27 - 00:43

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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 highest latencies:
System rackaslot5s.osadl.org (updated Fri Dec 26, 2025 12:43:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811620,0rcu_preempt3-21ksoftirqd/009:26:320
811210,0rcu_preempt3545-1kworker/1:1H07:25:261
811170,0rcu_preempt19-21ksoftirqd/110:10:081
811130,0rcu_preempt3-21ksoftirqd/010:46:320
811030,0rcu_preempt19-21ksoftirqd/110:30:111
81990,0rcu_preempt19-21ksoftirqd/107:20:021
81970,0rcu_preempt19-21ksoftirqd/111:45:231
81950,0rcu_preempt3-21ksoftirqd/010:55:170
81930,0rcu_preempt19-21ksoftirqd/112:12:061
81910,0rcu_preempt3-21ksoftirqd/007:30:200
81890,0rcu_preempt3-21ksoftirqd/009:40:160
81890,0rcu_preempt19-21ksoftirqd/107:19:581
81850,0rcu_preempt19-21ksoftirqd/107:39:581
81840,0rcu_preempt3-21ksoftirqd/010:40:120
81820,0rcu_preempt3-21ksoftirqd/011:45:350
81820,0rcu_preempt19-21ksoftirqd/112:00:271
199792810,0sleep010050irq/346-484840008:12:190
81780,0rcu_preempt3-21ksoftirqd/008:40:160
81780,0rcu_preempt31352-21cyclictest10:15:191
81780,0rcu_preempt19-21ksoftirqd/110:46:591
81770,0rcu_preempt3-21ksoftirqd/010:35:310
81770,0rcu_preempt19-21ksoftirqd/112:15:061
81760,0rcu_preempt19-21ksoftirqd/110:44:571
81750,0rcu_preempt3-21ksoftirqd/010:00:190
81750,0rcu_preempt19-21ksoftirqd/108:00:211
81740,0rcu_preempt3-21ksoftirqd/011:10:080
81740,0rcu_preempt19-21ksoftirqd/110:39:581
81740,0rcu_preempt19-21ksoftirqd/107:30:071
81720,0rcu_preempt19-21ksoftirqd/108:19:571
152442720,0sleep010050irq/346-484840007:59:150
81710,0rcu_preempt3-21ksoftirqd/011:00:290
81700,0rcu_preempt3-21ksoftirqd/011:18:140
81700,0rcu_preempt3-21ksoftirqd/009:15:510
81700,0rcu_preempt3-21ksoftirqd/009:15:510
81700,0rcu_preempt19-21ksoftirqd/109:55:091
81700,0rcu_preempt19-21ksoftirqd/108:29:571
81700,0rcu_preempt19-21ksoftirqd/107:40:021
81690,0rcu_preempt3-21ksoftirqd/011:05:230
81690,0rcu_preempt19-21ksoftirqd/110:05:071
81680,0rcu_preempt3-21ksoftirqd/012:10:200
81680,0rcu_preempt19-21ksoftirqd/111:39:571
81670,0rcu_preempt3-21ksoftirqd/012:29:280
81670,0rcu_preempt3-21ksoftirqd/008:20:260
81660,0rcu_preempt3-21ksoftirqd/009:45:070
81660,0rcu_preempt19-21ksoftirqd/111:29:571
81660,0rcu_preempt19-21ksoftirqd/109:40:191
81660,0rcu_preempt19-21ksoftirqd/109:34:561
81660,0rcu_preempt19-21ksoftirqd/108:25:191
81640,0rcu_preempt32625-1kworker/1:3H10:20:301
81640,0rcu_preempt3-21ksoftirqd/009:54:380
81640,0rcu_preempt3-21ksoftirqd/009:54:380
81640,0rcu_preempt19-21ksoftirqd/111:10:081
81630,0rcu_preempt5832-21diskmemload11:05:181
81630,0rcu_preempt3-21ksoftirqd/012:35:220
81630,0rcu_preempt3-21ksoftirqd/010:50:290
81630,0rcu_preempt19-21ksoftirqd/110:55:081
81620,0rcu_preempt19-21ksoftirqd/109:37:431
81620,0rcu_preempt19-21ksoftirqd/109:37:431
81610,0rcu_preempt5832-21diskmemload09:47:511
81610,0rcu_preempt3-21ksoftirqd/011:40:110
81610,0rcu_preempt29415-1kworker/1:4H12:05:151
81600,0rcu_preempt9898-1kworker/0:0H10:30:190
81600,0rcu_preempt3-21ksoftirqd/009:55:120
81600,0rcu_preempt19-21ksoftirqd/111:25:091
81600,0rcu_preempt19-21ksoftirqd/110:25:081
81600,0rcu_preempt14092-21kworker/0:011:29:550
249972600,0sleep010050irq/346-484840008:28:250
81590,0rcu_preempt6291-1kworker/1:1H09:20:011
167692590,0sleep010050irq/346-484840008:02:530
81580,0rcu_preempt3-21ksoftirqd/012:09:140
81580,0rcu_preempt3-21ksoftirqd/011:36:240
81580,0rcu_preempt3-21ksoftirqd/011:20:090
81580,0rcu_preempt3-21ksoftirqd/010:20:220
81580,0rcu_preempt3-21ksoftirqd/009:36:030
81580,0rcu_preempt3-21ksoftirqd/009:36:030
81580,0rcu_preempt3-21ksoftirqd/009:10:270
81580,0rcu_preempt19-21ksoftirqd/111:00:291
81580,0rcu_preempt19-21ksoftirqd/108:35:271
81570,0rcu_preempt3-21ksoftirqd/010:10:080
10050570,0irq/346-484840017021-21runrttasks12:24:250
81560,0rcu_preempt3-21ksoftirqd/010:15:260
81560,0rcu_preempt19-21ksoftirqd/108:20:301
215652560,0sleep010050irq/346-484840008:16:490
81550,0rcu_preempt3-21ksoftirqd/011:51:030
81550,0rcu_preempt28137-21php-cgi12:00:150
81550,0rcu_preempt19-21ksoftirqd/110:00:271
81550,0rcu_preempt19-21ksoftirqd/108:49:571
10050550,0irq/346-484840024680-21munin-node0
81530,0rcu_preempt3-21ksoftirqd/008:55:170
81530,0rcu_preempt3-21ksoftirqd/008:55:170
81530,0rcu_preempt19-21ksoftirqd/112:35:011
81530,0rcu_preempt19-21ksoftirqd/112:25:131
81520,0rcu_preempt3-21ksoftirqd/012:30:220
81520,0rcu_preempt19-21ksoftirqd/109:50:231
81520,0rcu_preempt19-21ksoftirqd/109:50:231
81520,0rcu_preempt10756-1kworker/1:2H09:15:291
81520,0rcu_preempt10756-1kworker/1:2H09:15:291
10050520,0irq/346-484840014949-21ssh09:20:010
81510,0rcu_preempt19-21ksoftirqd/109:10:301
46022510,0sleep010050irq/346-484840007:25:220
9950500,0irq/345-4848400811-21rngd11:34:570
81500,0rcu_preempt7762-21apt-get10:25:070
81500,0rcu_preempt3-21ksoftirqd/011:55:200
10050500,0irq/346-48484006600-1kworker/0:1H12:15:290
81490,0rcu_preempt3-21ksoftirqd/010:07:190
81480,0rcu_preempt3-21ksoftirqd/008:50:210
81480,0rcu_preempt19-21ksoftirqd/108:05:081
10050480,0irq/346-484840026271-1kworker/0:1H08:35:140
81470,0rcu_preempt19-21ksoftirqd/109:25:241
50162470,0sleep19950irq/345-484840009:05:221
4350470,0irq/32-4330000025508-21dropbear08:30:120
10050470,0irq/346-48484003-21ksoftirqd/007:39:580
10050470,0irq/346-48484002209-1kworker/0:0H07:20:180
81460,0rcu_preempt19-21ksoftirqd/111:58:161
10050460,0irq/346-48484002220-21ping07:45:350
10050460,0irq/346-48484002220-21ping07:40:250
10050460,0irq/346-484840016658-1kworker/0:3H08:05:210
232462450,0sleep19950irq/345-484840011:18:311
10050450,0irq/346-484840029891-1kworker/0:0H07:07:230
81440,0rcu_preempt14833-1kworker/1:3H12:21:501
81440,0rcu_preempt0-21swapper/111:40:011
10050440,0irq/346-484840029891-1kworker/0:0H07:10:140
10050440,0irq/346-484840029751-1kworker/0:2H08:45:230
10050440,0irq/346-484840011736-1kworker/0:0H07:50:110
81430,0rcu_preempt19-21ksoftirqd/111:20:171
81420,0rcu_preempt31352-21cyclictest10:50:131
13250420,0irq/301-48020004543-21sh09:05:120
81410,0rcu_preempt19-21ksoftirqd/112:32:171
81410,0rcu_preempt19-21ksoftirqd/107:10:181
10050410,0irq/346-4848400877-1kworker/0:0H09:00:250
9950400,0irq/345-4848400709-21aten_rapower_cu07:15:080
81390,0rcu_preempt19-21ksoftirqd/108:10:071
81390,0rcu_preempt19-21ksoftirqd/107:59:581
9950370,0irq/345-484840032685-1kworker/1:1H08:59:571
9950370,0irq/345-484840032685-1kworker/1:1H08:59:571
81370,0rcu_preempt19-21ksoftirqd/107:05:171
1699350,0migration/120275-21sh11:50:401
9950340,0irq/345-48484002718-21munin-node1
1699340,0migration/112271-21aten_rapower_en07:50:091
10050330,0irq/346-484840028411-1kworker/1:1H08:40:151
10050320,0irq/346-48484008454-1kworker/1:0H07:45:291
10050300,0irq/346-484840030208-1kworker/1:2H08:45:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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