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2026-08-05 - 11:25

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Wed Aug 05, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811130,0rcu_preempt3-21ksoftirqd/021:27:410
811020,0rcu_preempt3-21ksoftirqd/021:21:240
811010,0rcu_preempt3-21ksoftirqd/021:11:500
81920,0rcu_preempt3-21ksoftirqd/022:17:020
81920,0rcu_preempt3-21ksoftirqd/022:17:020
81820,0rcu_preempt3-21ksoftirqd/000:00:150
81800,0rcu_preempt32183-21kworker/0:222:07:180
81790,0rcu_preempt3-21ksoftirqd/021:58:270
81780,0rcu_preempt836-21rngd22:56:100
81760,0rcu_preempt3-21ksoftirqd/023:13:400
81760,0rcu_preempt3-21ksoftirqd/000:20:440
81750,0rcu_preempt3-21ksoftirqd/023:28:120
81750,0rcu_preempt3-21ksoftirqd/023:28:120
81750,0rcu_preempt3-21ksoftirqd/023:24:510
81750,0rcu_preempt3-21ksoftirqd/023:19:240
81740,0rcu_preempt3-21ksoftirqd/021:48:450
81730,0rcu_preempt3-21ksoftirqd/023:46:300
81730,0rcu_preempt3-21ksoftirqd/022:49:200
81730,0rcu_preempt3-21ksoftirqd/021:31:200
81720,0rcu_preempt3-21ksoftirqd/023:37:310
81720,0rcu_preempt3-21ksoftirqd/023:00:150
81720,0rcu_preempt3-21ksoftirqd/022:21:530
81720,0rcu_preempt3-21ksoftirqd/021:43:150
81720,0rcu_preempt3-21ksoftirqd/000:33:500
81710,0rcu_preempt3-21ksoftirqd/023:44:380
81710,0rcu_preempt3-21ksoftirqd/022:40:320
81710,0rcu_preempt3-21ksoftirqd/022:03:270
81700,0rcu_preempt3-21ksoftirqd/023:06:320
81700,0rcu_preempt3-21ksoftirqd/022:37:420
81700,0rcu_preempt3-21ksoftirqd/021:17:550
81690,0rcu_preempt3-21ksoftirqd/022:32:360
81690,0rcu_preempt3-21ksoftirqd/000:18:260
81680,0rcu_preempt3-21ksoftirqd/023:50:120
81680,0rcu_preempt3-21ksoftirqd/023:34:300
81680,0rcu_preempt3-21ksoftirqd/022:27:330
81680,0rcu_preempt3-21ksoftirqd/021:51:090
81680,0rcu_preempt3-21ksoftirqd/000:25:530
81680,0rcu_preempt3-21ksoftirqd/000:10:370
81670,0rcu_preempt3-21ksoftirqd/022:51:330
81670,0rcu_preempt3-21ksoftirqd/021:37:370
81670,0rcu_preempt3-21ksoftirqd/000:06:430
81670,0rcu_preempt19-21ksoftirqd/123:14:541
81660,0rcu_preempt3-21ksoftirqd/023:55:070
81660,0rcu_preempt3-21ksoftirqd/022:13:240
81660,0rcu_preempt3-21ksoftirqd/000:37:500
81630,0rcu_preempt19-21ksoftirqd/123:40:071
81630,0rcu_preempt19-21ksoftirqd/121:20:211
81620,0rcu_preempt19-21ksoftirqd/121:28:381
81620,0rcu_preempt19-21ksoftirqd/119:30:091
741199621,0cyclictest10691-21ping19:40:110
81610,0rcu_preempt3-21ksoftirqd/021:00:070
741199612,0cyclictest13144-21cut21:05:130
741199612,0cyclictest0-21swapper/019:20:150
81600,0rcu_preempt3-21ksoftirqd/020:35:130
81600,0rcu_preempt19-21ksoftirqd/123:30:111
741199603,0cyclictest0-21swapper/019:15:120
741199603,0cyclictest0-21swapper/019:15:120
7411996016,0cyclictest7554-21munin-node0
81590,0rcu_preempt3-21ksoftirqd/020:45:030
81590,0rcu_preempt25790-21df_abs20:05:090
741199592,0cyclictest0-21swapper/019:35:270
7411995915,0cyclictest0-21swapper/020:00:190
81580,0rcu_preempt3-21ksoftirqd/019:05:060
81570,0rcu_preempt19-21ksoftirqd/121:15:151
81570,0rcu_preempt19-21ksoftirqd/119:25:141
81570,0rcu_preempt19-21ksoftirqd/100:28:151
81570,0rcu_preempt0-21swapper/123:27:151
81570,0rcu_preempt0-21swapper/123:27:151
741199572,0cyclictest22954-21tr19:55:180
741199572,0cyclictest11091-21sendmail20:59:540
741199572,0cyclictest0-21swapper/019:25:060
81560,0rcu_preempt19-21ksoftirqd/122:35:281
81560,0rcu_preempt19-21ksoftirqd/122:09:251
81560,0rcu_preempt19-21ksoftirqd/100:30:131
81560,0rcu_preempt19-21ksoftirqd/100:18:011
741199561,0cyclictest10691-21ping19:30:060
81550,0rcu_preempt19-21ksoftirqd/123:55:011
81550,0rcu_preempt1395-21apt-get20:30:070
741199552,0cyclictest32166-21apt-get20:25:050
81540,0rcu_preempt19-21ksoftirqd/122:49:161
81540,0rcu_preempt19-21ksoftirqd/122:23:041
81540,0rcu_preempt19-21ksoftirqd/119:50:151
741199542,0cyclictest30389-21latency_hist20:19:550
741199542,0cyclictest10691-21ping19:45:310
741199542,0cyclictest10691-21ping19:45:310
81530,0rcu_preempt19-21ksoftirqd/123:36:181
81530,0rcu_preempt19-21ksoftirqd/120:15:061
81530,0rcu_preempt19-21ksoftirqd/120:07:211
741199531,0cyclictest1445-21runrttasks20:10:550
81520,0rcu_preempt23970-21munin-node1
81520,0rcu_preempt19-21ksoftirqd/123:15:021
81520,0rcu_preempt19-21ksoftirqd/122:26:111
81520,0rcu_preempt19-21ksoftirqd/120:28:111
81520,0rcu_preempt19-21ksoftirqd/120:20:241
81520,0rcu_preempt0-21swapper/120:10:161
741199522,0cyclictest0-21swapper/019:50:080
81510,0rcu_preempt19-21ksoftirqd/100:20:461
81510,0rcu_preempt19-21ksoftirqd/100:06:201
7411995113,0cyclictest8180-21dropbear20:50:120
81490,0rcu_preempt19-21ksoftirqd/121:10:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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