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2025-06-28 - 23:09

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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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 rackaslot5s.osadl.org (updated Sat Jun 28, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811400,0rcu_preempt19-21ksoftirqd/107:27:281
811380,0rcu_preempt19-21ksoftirqd/107:16:561
811260,0rcu_preempt19-21ksoftirqd/107:17:331
811230,0rcu_preempt19-21ksoftirqd/109:37:291
811170,0rcu_preempt3-21ksoftirqd/009:12:120
811160,0rcu_preempt19-21ksoftirqd/109:07:271
811160,0rcu_preempt19-21ksoftirqd/109:07:271
811150,0rcu_preempt19-21ksoftirqd/109:17:151
811110,0rcu_preempt3-21ksoftirqd/011:47:240
811110,0rcu_preempt3-21ksoftirqd/011:36:560
811110,0rcu_preempt3-21ksoftirqd/011:36:560
811100,0rcu_preempt3-21ksoftirqd/009:42:170
811090,0rcu_preempt19-21ksoftirqd/109:57:301
811080,0rcu_preempt3-21ksoftirqd/010:57:290
811070,0rcu_preempt30619-21ssh11:52:121
811050,0rcu_preempt19-21ksoftirqd/107:42:121
811040,0rcu_preempt19-21ksoftirqd/109:46:571
811030,0rcu_preempt19-21ksoftirqd/110:02:251
811010,0rcu_preempt3-21ksoftirqd/010:07:250
81980,0rcu_preempt6259-21sendmail10:36:560
81970,0rcu_preempt19-21ksoftirqd/110:56:561
81970,0rcu_preempt19-21ksoftirqd/110:12:181
81950,0rcu_preempt3-21ksoftirqd/008:27:170
81950,0rcu_preempt19-21ksoftirqd/111:57:161
81940,0rcu_preempt5896-21munin-node1
81940,0rcu_preempt3-21ksoftirqd/011:12:360
81940,0rcu_preempt3-21ksoftirqd/010:17:120
81930,0rcu_preempt3-21ksoftirqd/010:22:240
81930,0rcu_preempt19-21ksoftirqd/111:36:561
81930,0rcu_preempt19-21ksoftirqd/110:47:231
81930,0rcu_preempt19-21ksoftirqd/110:47:231
81920,0rcu_preempt19-21ksoftirqd/108:47:261
81900,0rcu_preempt3-21ksoftirqd/012:07:140
81900,0rcu_preempt19-21ksoftirqd/109:42:281
81890,0rcu_preempt3-21ksoftirqd/012:22:130
81880,0rcu_preempt3-21ksoftirqd/011:26:560
81880,0rcu_preempt19-21ksoftirqd/112:01:561
81880,0rcu_preempt19-21ksoftirqd/112:01:561
81870,0rcu_preempt3-21ksoftirqd/009:36:560
81860,0rcu_preempt4016-21munin-node0
81860,0rcu_preempt3-21ksoftirqd/009:07:180
81860,0rcu_preempt3-21ksoftirqd/009:07:180
81860,0rcu_preempt3-21ksoftirqd/008:06:560
81860,0rcu_preempt29544-21grep11:07:290
81850,0rcu_preempt3-21ksoftirqd/012:36:560
81850,0rcu_preempt3-21ksoftirqd/009:47:270
81850,0rcu_preempt3-21ksoftirqd/008:57:120
81850,0rcu_preempt28618-21latency_hist08:41:561
81850,0rcu_preempt19-21ksoftirqd/107:47:171
81850,0rcu_preempt19-21ksoftirqd/107:47:171
81840,0rcu_preempt3-21ksoftirqd/008:37:310
81840,0rcu_preempt19-21ksoftirqd/111:47:281
81830,0rcu_preempt3-21ksoftirqd/007:37:100
81830,0rcu_preempt3-21ksoftirqd/007:37:100
81830,0rcu_preempt19-21ksoftirqd/112:21:561
81830,0rcu_preempt19-21ksoftirqd/109:27:161
81820,0rcu_preempt19-21ksoftirqd/110:57:201
81810,0rcu_preempt3-21ksoftirqd/008:52:240
81810,0rcu_preempt3-21ksoftirqd/008:12:130
81810,0rcu_preempt3-21ksoftirqd/007:27:300
81810,0rcu_preempt19-21ksoftirqd/112:32:101
81810,0rcu_preempt19-21ksoftirqd/111:17:271
81810,0rcu_preempt19-21ksoftirqd/110:32:301
81810,0rcu_preempt19-21ksoftirqd/108:17:331
81800,0rcu_preempt3-21ksoftirqd/011:52:090
81790,0rcu_preempt19-21ksoftirqd/111:37:091
81790,0rcu_preempt19-21ksoftirqd/111:37:091
81790,0rcu_preempt19-21ksoftirqd/108:31:561
81780,0rcu_preempt3-21ksoftirqd/009:30:420
81780,0rcu_preempt19-21ksoftirqd/111:27:231
81780,0rcu_preempt19-21ksoftirqd/109:52:191
81770,0rcu_preempt3-21ksoftirqd/012:17:260
81770,0rcu_preempt3-21ksoftirqd/009:32:140
81770,0rcu_preempt19-21ksoftirqd/111:22:231
81770,0rcu_preempt19-21ksoftirqd/110:21:561
81770,0rcu_preempt19-21ksoftirqd/110:07:111
81770,0rcu_preempt15408-21latency_hist08:01:561
81770,0rcu_preempt0-21swapper/011:42:270
81760,0rcu_preempt3-21ksoftirqd/007:42:360
81760,0rcu_preempt19-21ksoftirqd/110:42:221
81760,0rcu_preempt19-21ksoftirqd/108:42:261
81760,0rcu_preempt19-21ksoftirqd/108:12:301
81750,0rcu_preempt7839-1kworker/0:2H09:17:260
81750,0rcu_preempt3-21ksoftirqd/009:51:560
81750,0rcu_preempt19-21ksoftirqd/110:37:281
81740,0rcu_preempt3-21ksoftirqd/011:17:280
81740,0rcu_preempt3-21ksoftirqd/008:42:260
81730,0rcu_preempt3-21ksoftirqd/011:36:110
81730,0rcu_preempt19-21ksoftirqd/112:12:241
81730,0rcu_preempt14639-21/usr/sbin/munin11:31:550
81720,0rcu_preempt3-21ksoftirqd/012:12:290
81720,0rcu_preempt3-21ksoftirqd/012:06:560
81720,0rcu_preempt3-21ksoftirqd/012:06:560
81720,0rcu_preempt19-21ksoftirqd/112:27:101
81720,0rcu_preempt19-21ksoftirqd/109:16:561
81720,0rcu_preempt19-21ksoftirqd/108:57:171
81710,0rcu_preempt3-21ksoftirqd/009:24:480
81710,0rcu_preempt3-21ksoftirqd/009:06:580
81710,0rcu_preempt3-21ksoftirqd/008:17:180
81710,0rcu_preempt19-21ksoftirqd/111:46:561
81710,0rcu_preempt19-21ksoftirqd/111:06:561
81700,0rcu_preempt3-21ksoftirqd/011:04:410
81700,0rcu_preempt3-21ksoftirqd/010:37:160
81700,0rcu_preempt3-21ksoftirqd/010:02:100
81700,0rcu_preempt19-21ksoftirqd/107:26:561
81690,0rcu_preempt3-21ksoftirqd/012:26:570
81690,0rcu_preempt3-21ksoftirqd/010:53:130
81690,0rcu_preempt19-21ksoftirqd/112:22:291
81690,0rcu_preempt17299-21kworker/0:007:22:330
81680,0rcu_preempt3-21ksoftirqd/010:26:560
81670,0rcu_preempt3-21ksoftirqd/008:47:260
81670,0rcu_preempt19-21ksoftirqd/110:27:251
81670,0rcu_preempt19-21ksoftirqd/109:32:231
81660,0rcu_preempt3-21ksoftirqd/009:57:210
81660,0rcu_preempt19-21ksoftirqd/109:21:581
81660,0rcu_preempt19-21ksoftirqd/108:07:141
81650,0rcu_preempt3-21ksoftirqd/007:47:160
81650,0rcu_preempt3-21ksoftirqd/007:47:160
81650,0rcu_preempt19-21ksoftirqd/110:22:291
81650,0rcu_preempt19-21ksoftirqd/109:01:561
81640,0rcu_preempt3-21ksoftirqd/010:42:110
81640,0rcu_preempt3-21ksoftirqd/007:57:100
81640,0rcu_preempt3-21ksoftirqd/007:11:560
81640,0rcu_preempt19-21ksoftirqd/107:41:561
81640,0rcu_preempt19-21ksoftirqd/107:41:561
81630,0rcu_preempt19-21ksoftirqd/108:21:561
81630,0rcu_preempt12458-21df_abs07:52:110
81620,0rcu_preempt3-21ksoftirqd/010:47:300
81620,0rcu_preempt3-21ksoftirqd/010:47:300
81620,0rcu_preempt3-21ksoftirqd/010:12:230
81620,0rcu_preempt3-21ksoftirqd/007:32:350
81620,0rcu_preempt19-21ksoftirqd/107:52:151
81610,0rcu_preempt31457-21sed07:11:561
81600,0rcu_preempt19-21ksoftirqd/112:10:161
81590,0rcu_preempt19-21ksoftirqd/111:12:191
81570,0rcu_preempt3-21ksoftirqd/007:12:190
81570,0rcu_preempt19-21ksoftirqd/108:32:281
81550,0rcu_preempt3-21ksoftirqd/008:07:250
81540,0rcu_preempt19-21ksoftirqd/108:02:121
81530,0rcu_preempt3-21ksoftirqd/007:06:560
10050520,0irq/346-484840054-21kswapd007:19:280
81510,0rcu_preempt3-21ksoftirqd/008:32:140
81510,0rcu_preempt3-21ksoftirqd/008:22:250
81510,0rcu_preempt19-21ksoftirqd/111:07:261
81470,0rcu_preempt19-21ksoftirqd/108:52:171
81400,0rcu_preempt19-21ksoftirqd/107:01:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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