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2026-08-02 - 19:00

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 highest latencies:
System rackaslot5s.osadl.org (updated Sun Aug 02, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811290,0rcu_preempt19-21ksoftirqd/107:30:291
811290,0rcu_preempt19-21ksoftirqd/107:30:291
811280,0rcu_preempt19-21ksoftirqd/107:28:051
811100,0rcu_preempt3-21ksoftirqd/011:54:280
811090,0rcu_preempt3-21ksoftirqd/009:21:010
811090,0rcu_preempt19-21ksoftirqd/111:36:421
811080,0rcu_preempt3-21ksoftirqd/007:12:300
811080,0rcu_preempt3-21ksoftirqd/007:12:300
811080,0rcu_preempt19-21ksoftirqd/109:43:571
811070,0rcu_preempt3-21ksoftirqd/010:43:090
811060,0rcu_preempt3-21ksoftirqd/008:30:230
811040,0rcu_preempt19-21ksoftirqd/110:50:171
811010,0rcu_preempt3-21ksoftirqd/009:16:500
811000,0rcu_preempt19-21ksoftirqd/107:24:571
81990,0rcu_preempt3-21ksoftirqd/010:02:240
81980,0rcu_preempt19-21ksoftirqd/108:00:321
81970,0rcu_preempt19-21ksoftirqd/111:30:251
81960,0rcu_preempt19-21ksoftirqd/109:20:211
81950,0rcu_preempt19-21ksoftirqd/110:00:161
81940,0rcu_preempt19-21ksoftirqd/112:00:271
81910,0rcu_preempt19-21ksoftirqd/111:50:171
81910,0rcu_preempt13013-1kworker/1:0H10:46:171
81900,0rcu_preempt19-21ksoftirqd/109:15:111
81880,0rcu_preempt24169-21diskmemload12:10:161
81880,0rcu_preempt24169-21diskmemload10:34:581
81880,0rcu_preempt19-21ksoftirqd/110:22:181
81860,0rcu_preempt22418-21irqstats12:25:191
81860,0rcu_preempt19-21ksoftirqd/112:36:301
81860,0rcu_preempt19-21ksoftirqd/112:36:301
81850,0rcu_preempt19-21ksoftirqd/112:30:261
81830,0rcu_preempt19-21ksoftirqd/110:55:411
81830,0rcu_preempt19-21ksoftirqd/110:10:091
81830,0rcu_preempt19-21ksoftirqd/109:10:281
81830,0rcu_preempt19-21ksoftirqd/108:35:241
81810,0rcu_preempt19-21ksoftirqd/110:44:571
81800,0rcu_preempt19-21ksoftirqd/108:25:291
81790,0rcu_preempt19-21ksoftirqd/111:15:101
81790,0rcu_preempt19-21ksoftirqd/110:19:241
81790,0rcu_preempt19-21ksoftirqd/109:53:391
81780,0rcu_preempt20180-1kworker/0:2H07:20:190
81780,0rcu_preempt19-21ksoftirqd/111:57:591
81780,0rcu_preempt19-21ksoftirqd/111:40:151
81780,0rcu_preempt19-21ksoftirqd/111:07:391
81780,0rcu_preempt19-21ksoftirqd/107:50:181
81770,0rcu_preempt1445-21runrttasks07:35:001
81760,0rcu_preempt3-21ksoftirqd/009:43:490
81760,0rcu_preempt19-21ksoftirqd/111:48:381
81760,0rcu_preempt19-21ksoftirqd/111:09:581
81760,0rcu_preempt19-21ksoftirqd/108:55:241
81760,0rcu_preempt19-21ksoftirqd/108:44:571
81740,0rcu_preempt19-21ksoftirqd/110:09:321
81740,0rcu_preempt19-21ksoftirqd/109:55:201
81740,0rcu_preempt19-21ksoftirqd/108:50:231
81740,0rcu_preempt19-21ksoftirqd/108:50:231
81740,0rcu_preempt19-21ksoftirqd/108:14:571
81740,0rcu_preempt19-21ksoftirqd/107:10:101
81740,0rcu_preempt19-21ksoftirqd/107:10:101
81730,0rcu_preempt3-21ksoftirqd/011:42:490
81720,0rcu_preempt19-21ksoftirqd/107:42:381
81710,0rcu_preempt3-21ksoftirqd/010:58:220
81710,0rcu_preempt19-21ksoftirqd/111:21:091
81710,0rcu_preempt19-21ksoftirqd/110:30:181
81700,0rcu_preempt3-21ksoftirqd/010:27:140
81700,0rcu_preempt3-21ksoftirqd/009:11:270
81700,0rcu_preempt19-21ksoftirqd/111:25:231
81690,0rcu_preempt19-21ksoftirqd/108:05:271
81680,0rcu_preempt3-21ksoftirqd/011:17:220
81680,0rcu_preempt19-21ksoftirqd/112:05:221
81670,0rcu_preempt7121-21kworker/1:309:38:411
81670,0rcu_preempt19-21ksoftirqd/112:23:491
81670,0rcu_preempt19-21ksoftirqd/107:55:271
81660,0rcu_preempt17211-21cyclictest11:30:180
81650,0rcu_preempt3-21ksoftirqd/009:46:020
81650,0rcu_preempt1248-21ssh10:25:101
81640,0rcu_preempt19-21ksoftirqd/109:32:211
81630,0rcu_preempt19-21ksoftirqd/109:45:591
81630,0rcu_preempt19-21ksoftirqd/109:28:481
81620,0rcu_preempt19-21ksoftirqd/111:00:201
10050610,0irq/346-484840054-21kswapd010:50:020
81600,0rcu_preempt32215-21kworker/1:012:15:421
81600,0rcu_preempt3-21ksoftirqd/011:10:250
81600,0rcu_preempt19-21ksoftirqd/108:20:221
81590,0rcu_preempt908-21ping08:20:290
1721299588,0cyclictest23310-21runrttasks12:25:480
81570,0rcu_preempt19-21ksoftirqd/108:45:121
81570,0rcu_preempt19-21ksoftirqd/107:15:111
81570,0rcu_preempt19-21ksoftirqd/107:15:111
81560,0rcu_preempt24169-21diskmemload12:34:280
81560,0rcu_preempt19-21ksoftirqd/108:15:091
81550,0rcu_preempt3-21ksoftirqd/012:35:130
81550,0rcu_preempt3-21ksoftirqd/012:35:130
81550,0rcu_preempt26249-21sh11:55:400
81540,0rcu_preempt4061-21apt-get09:55:090
10050540,0irq/346-48484005304-1kworker/0:1H11:02:210
9950520,0irq/345-4848400111rcuc/010:19:370
81520,0rcu_preempt7121-21kworker/1:307:45:261
81520,0rcu_preempt22531-21munin-run09:04:561
81510,0rcu_preempt3-21ksoftirqd/008:48:380
81500,0rcu_preempt3-21ksoftirqd/008:00:240
81490,0rcu_preempt908-21ping08:05:190
81490,0rcu_preempt5406-21kworker/0:210:39:100
81490,0rcu_preempt3-21ksoftirqd/012:13:190
81490,0rcu_preempt3-21ksoftirqd/011:05:120
81490,0rcu_preempt3-21ksoftirqd/010:45:140
81490,0rcu_preempt3-21ksoftirqd/009:05:420
81480,0rcu_preempt3-21ksoftirqd/011:29:220
81480,0rcu_preempt3-21ksoftirqd/007:55:200
81470,0rcu_preempt908-21ping08:25:290
81470,0rcu_preempt908-21ping08:14:570
81470,0rcu_preempt3-21ksoftirqd/009:38:100
81470,0rcu_preempt24169-21diskmemload09:34:490
81460,0rcu_preempt3-21ksoftirqd/011:45:080
81460,0rcu_preempt3-21ksoftirqd/011:20:190
81460,0rcu_preempt24169-21diskmemload09:52:230
81450,0rcu_preempt3-21ksoftirqd/012:15:250
81450,0rcu_preempt3-21ksoftirqd/012:00:270
81450,0rcu_preempt3-21ksoftirqd/010:30:130
81450,0rcu_preempt3-21ksoftirqd/008:18:470
1721299454,0cyclictest19069-1kworker/0:1H12:23:100
10050450,0irq/346-484840016774-21runrttasks07:05:360
81440,0rcu_preempt19-21ksoftirqd/109:05:251
81440,0rcu_preempt19-21ksoftirqd/108:30:231
81440,0rcu_preempt17078-21kworker/0:107:49:240
10050440,0irq/346-484840041ktimersoftd/007:28:120
81430,0rcu_preempt3-21ksoftirqd/011:35:130
81430,0rcu_preempt3-21ksoftirqd/010:24:350
81430,0rcu_preempt3-21ksoftirqd/010:05:100
81430,0rcu_preempt24169-21diskmemload09:25:090
81430,0rcu_preempt19-21ksoftirqd/107:05:241
81430,0rcu_preempt17755-21apt-get08:50:080
81430,0rcu_preempt17755-21apt-get08:50:080
81430,0rcu_preempt14478-21apt-get08:40:070
81420,0rcu_preempt3-21ksoftirqd/012:08:060
81420,0rcu_preempt3-21ksoftirqd/009:00:080
81420,0rcu_preempt18995-21apt-get07:15:090
81420,0rcu_preempt18995-21apt-get07:15:090
10050420,0irq/346-484840054-21kswapd010:10:270
81400,0rcu_preempt3-21ksoftirqd/008:55:200
81400,0rcu_preempt3-21ksoftirqd/007:50:110
81390,0rcu_preempt3-21ksoftirqd/008:35:200
1721299382,0cyclictest20491-21ping07:30:070
1721299382,0cyclictest20491-21ping07:30:070
1721299361,0cyclictest20491-21ping07:40:060
1721299352,0cyclictest25817-21php-cgi07:35:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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