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2026-05-19 - 00:00

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 Mon May 18, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81710,0rcu_preempt3-21ksoftirqd/011:33:270
81660,0rcu_preempt3-21ksoftirqd/009:28:260
81660,0rcu_preempt3-21ksoftirqd/009:28:260
81650,0rcu_preempt851-21rngd09:55:260
81640,0rcu_preempt3-21ksoftirqd/010:52:580
81630,0rcu_preempt29147-21ntp_states11:28:240
106162630,0chrt9950irq/345-484840012:15:301
10050620,0irq/346-484840054-21kswapd009:33:121
10050620,0irq/346-484840014538-21munin-node0
81560,0rcu_preempt19-21ksoftirqd/109:49:271
10050560,0irq/346-484840054-21kswapd012:01:451
81550,0rcu_preempt3-21ksoftirqd/012:18:220
81550,0rcu_preempt3-21ksoftirqd/009:43:180
81550,0rcu_preempt3-21ksoftirqd/007:08:240
81550,0rcu_preempt29854-21kworker/0:011:13:240
81540,0rcu_preempt3-21ksoftirqd/012:23:090
81540,0rcu_preempt3-21ksoftirqd/012:13:140
81540,0rcu_preempt3-21ksoftirqd/010:38:180
81540,0rcu_preempt3-21ksoftirqd/010:13:090
81540,0rcu_preempt3-21ksoftirqd/009:18:170
81540,0rcu_preempt3-21ksoftirqd/007:03:170
81530,0rcu_preempt3-21ksoftirqd/011:58:230
81530,0rcu_preempt3-21ksoftirqd/011:56:340
81530,0rcu_preempt3-21ksoftirqd/011:56:340
81530,0rcu_preempt3-21ksoftirqd/011:45:540
81530,0rcu_preempt3-21ksoftirqd/011:25:570
81530,0rcu_preempt3-21ksoftirqd/008:48:070
81530,0rcu_preempt3-21ksoftirqd/008:18:090
81530,0rcu_preempt3-21ksoftirqd/008:18:090
81530,0rcu_preempt28745-21ping08:03:090
10050530,0irq/346-484840054-21kswapd012:11:531
10050530,0irq/346-484840030847-1kworker/1:2H11:49:351
81520,0rcu_preempt3-21ksoftirqd/011:08:270
81520,0rcu_preempt3-21ksoftirqd/008:00:110
81520,0rcu_preempt29773-21memory10:23:210
81520,0rcu_preempt19-21ksoftirqd/111:37:171
81510,0rcu_preempt3-21ksoftirqd/011:38:090
81510,0rcu_preempt3-21ksoftirqd/010:58:170
81510,0rcu_preempt3-21ksoftirqd/009:41:590
81510,0rcu_preempt3-21ksoftirqd/009:33:100
81510,0rcu_preempt3-21ksoftirqd/009:10:070
81510,0rcu_preempt3-21ksoftirqd/009:10:070
81510,0rcu_preempt29854-21kworker/0:010:46:150
81510,0rcu_preempt29319-21kworker/0:209:27:340
81510,0rcu_preempt28745-21ping08:13:080
81510,0rcu_preempt15011-21kworker/0:011:49:420
9950500,0irq/345-48484000-21swapper/012:12:120
81500,0rcu_preempt3-21ksoftirqd/010:53:150
81500,0rcu_preempt3-21ksoftirqd/010:53:150
81500,0rcu_preempt3-21ksoftirqd/009:48:190
81500,0rcu_preempt3-21ksoftirqd/008:23:110
81500,0rcu_preempt3-21ksoftirqd/008:08:240
81500,0rcu_preempt27471-21ssh12:33:100
81500,0rcu_preempt24836-21expr07:43:270
81500,0rcu_preempt19-21ksoftirqd/108:04:011
10050500,0irq/346-484840054-21kswapd009:58:210
81490,0rcu_preempt3-21ksoftirqd/010:03:170
81490,0rcu_preempt3-21ksoftirqd/008:59:530
81490,0rcu_preempt3-21ksoftirqd/008:53:260
81490,0rcu_preempt3-21ksoftirqd/008:53:260
81490,0rcu_preempt3-21ksoftirqd/008:28:200
81490,0rcu_preempt25545-21sh09:13:240
81480,0rcu_preempt3-21ksoftirqd/012:06:280
81480,0rcu_preempt3-21ksoftirqd/011:03:070
81480,0rcu_preempt3-21ksoftirqd/011:03:070
81480,0rcu_preempt3-21ksoftirqd/010:33:210
81480,0rcu_preempt3-21ksoftirqd/010:33:210
81480,0rcu_preempt3-21ksoftirqd/010:18:230
81480,0rcu_preempt3-21ksoftirqd/008:38:220
81480,0rcu_preempt3-21ksoftirqd/007:48:140
10050480,0irq/346-48484000-21swapper/010:31:510
81470,0rcu_preempt3-21ksoftirqd/012:28:090
81470,0rcu_preempt3-21ksoftirqd/008:43:110
81470,0rcu_preempt19-21ksoftirqd/111:32:081
81470,0rcu_preempt19-21ksoftirqd/109:25:191
81470,0rcu_preempt19-21ksoftirqd/109:17:071
81470,0rcu_preempt19-21ksoftirqd/108:16:391
81470,0rcu_preempt19-21ksoftirqd/107:55:581
10050470,0irq/346-484840027479-21apt07:53:080
10050470,0irq/346-48484000-21swapper/111:23:231
81460,0rcu_preempt19-21ksoftirqd/108:08:191
81460,0rcu_preempt19-21ksoftirqd/107:59:481
81460,0rcu_preempt14606-21php-cgi07:13:160
222822460,0chrt10050irq/346-484840007:36:510
10050460,0irq/346-484840019894-21ssh11:18:410
81450,0rcu_preempt19-21ksoftirqd/109:54:041
81440,0rcu_preempt19-21ksoftirqd/111:40:571
81440,0rcu_preempt19-21ksoftirqd/108:22:491
81440,0rcu_preempt19-21ksoftirqd/108:22:491
10050440,0irq/346-484840014846-21ssh11:47:171
81430,0rcu_preempt8204-21apt-get08:33:110
81430,0rcu_preempt54-21kswapd011:01:131
81430,0rcu_preempt54-21kswapd010:49:161
81430,0rcu_preempt3-21ksoftirqd/009:05:170
81430,0rcu_preempt3-21ksoftirqd/007:23:310
81430,0rcu_preempt19570-21diskmemload09:43:281
81430,0rcu_preempt19-21ksoftirqd/111:10:501
81430,0rcu_preempt19-21ksoftirqd/110:31:341
81430,0rcu_preempt19-21ksoftirqd/109:30:541
81430,0rcu_preempt19-21ksoftirqd/109:30:541
10050430,0irq/346-48484000-21swapper/110:12:341
81420,0rcu_preempt54-21kswapd012:33:101
81420,0rcu_preempt19-21ksoftirqd/111:57:171
81420,0rcu_preempt19-21ksoftirqd/111:57:171
81420,0rcu_preempt19-21ksoftirqd/110:38:111
81420,0rcu_preempt19-21ksoftirqd/110:33:191
81420,0rcu_preempt19-21ksoftirqd/110:33:191
81420,0rcu_preempt19-21ksoftirqd/110:13:241
81420,0rcu_preempt19-21ksoftirqd/110:03:251
81420,0rcu_preempt19-21ksoftirqd/108:28:141
81410,0rcu_preempt28558-21kworker/1:010:53:231
81410,0rcu_preempt28558-21kworker/1:010:53:231
81410,0rcu_preempt19-21ksoftirqd/112:25:241
81410,0rcu_preempt19-21ksoftirqd/112:18:561
81410,0rcu_preempt19-21ksoftirqd/112:05:371
81410,0rcu_preempt19-21ksoftirqd/111:04:081
81410,0rcu_preempt19-21ksoftirqd/111:04:081
81410,0rcu_preempt19-21ksoftirqd/108:23:191
81410,0rcu_preempt19-21ksoftirqd/107:40:441
81400,0rcu_preempt851-21rngd07:18:331
81400,0rcu_preempt19994-21proc_pri07:28:290
81400,0rcu_preempt19261-1kworker/1:2H09:06:271
81400,0rcu_preempt19-21ksoftirqd/112:32:561
81400,0rcu_preempt19-21ksoftirqd/111:20:341
81400,0rcu_preempt19-21ksoftirqd/110:25:151
81400,0rcu_preempt19-21ksoftirqd/110:02:211
81400,0rcu_preempt19-21ksoftirqd/109:38:111
81400,0rcu_preempt19-21ksoftirqd/109:08:171
81400,0rcu_preempt19-21ksoftirqd/109:08:171
81400,0rcu_preempt19-21ksoftirqd/108:48:081
81400,0rcu_preempt19-21ksoftirqd/107:33:211
81400,0rcu_preempt15849-21ping07:38:070
10050400,0irq/346-48484000-21swapper/111:13:041
81390,0rcu_preempt19-21ksoftirqd/110:43:141
81390,0rcu_preempt19-21ksoftirqd/109:18:151
81390,0rcu_preempt19-21ksoftirqd/108:58:231
81390,0rcu_preempt19-21ksoftirqd/108:38:161
81390,0rcu_preempt19-21ksoftirqd/107:28:001
81390,0rcu_preempt19-21ksoftirqd/107:15:061
81390,0rcu_preempt19-21ksoftirqd/107:03:191
81390,0rcu_preempt14987-21df_inode08:53:141
81390,0rcu_preempt14987-21df_inode08:53:141
1256199391,0cyclictest15849-21ping07:18:150
81380,0rcu_preempt19-21ksoftirqd/110:21:511
81380,0rcu_preempt19-21ksoftirqd/108:36:061
81380,0rcu_preempt19-21ksoftirqd/107:50:501
81380,0rcu_preempt19-21ksoftirqd/107:08:151
81360,0rcu_preempt24203-21apt-get07:43:101
81360,0rcu_preempt19-21ksoftirqd/108:43:441
81310,0rcu_preempt17860-21diskstats07:23:171
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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