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2026-08-02 - 04:47

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 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811040,0rcu_preempt24012-21ssh23:20:130
81930,0rcu_preempt9950irq/345-484840021:47:430
81870,0rcu_preempt19-21ksoftirqd/120:10:141
81830,0rcu_preempt19-21ksoftirqd/123:19:361
81810,0rcu_preempt3-21ksoftirqd/023:17:180
81760,0rcu_preempt19-21ksoftirqd/121:10:271
81720,0rcu_preempt19-21ksoftirqd/100:00:121
81710,0rcu_preempt19-21ksoftirqd/122:05:091
81700,0rcu_preempt26372-21kworker/1:121:35:261
10050690,0irq/346-4848400980-1kworker/0:3H21:19:590
81670,0rcu_preempt19-21ksoftirqd/100:25:121
81660,0rcu_preempt3-21ksoftirqd/022:54:540
81660,0rcu_preempt19-21ksoftirqd/121:59:571
81650,0rcu_preempt19-21ksoftirqd/121:48:101
81630,0rcu_preempt19-21ksoftirqd/122:00:281
81620,0rcu_preempt3-21ksoftirqd/023:51:390
81620,0rcu_preempt19-21ksoftirqd/123:05:091
81620,0rcu_preempt19-21ksoftirqd/100:07:501
81610,0rcu_preempt19-21ksoftirqd/122:58:231
81610,0rcu_preempt19-21ksoftirqd/122:51:331
81610,0rcu_preempt19-21ksoftirqd/100:16:141
81600,0rcu_preempt54-21kswapd023:27:071
81600,0rcu_preempt3-21ksoftirqd/023:37:080
81600,0rcu_preempt3-21ksoftirqd/023:37:080
81600,0rcu_preempt3-21ksoftirqd/023:09:410
81600,0rcu_preempt3-21ksoftirqd/023:00:160
81600,0rcu_preempt3-21ksoftirqd/020:34:490
81600,0rcu_preempt19-21ksoftirqd/123:55:051
81600,0rcu_preempt19-21ksoftirqd/121:42:461
81600,0rcu_preempt19-21ksoftirqd/120:29:581
81590,0rcu_preempt3-21ksoftirqd/022:20:220
81590,0rcu_preempt3-21ksoftirqd/022:10:460
81590,0rcu_preempt3-21ksoftirqd/019:20:370
81590,0rcu_preempt19-21ksoftirqd/119:20:131
81590,0rcu_preempt1324-21snmpd23:55:450
81580,0rcu_preempt3-21ksoftirqd/020:50:150
81580,0rcu_preempt3-21ksoftirqd/020:50:150
81580,0rcu_preempt3-21ksoftirqd/019:36:360
81580,0rcu_preempt3-21ksoftirqd/019:30:260
81580,0rcu_preempt3-21ksoftirqd/019:10:210
81580,0rcu_preempt19-21ksoftirqd/122:34:581
81580,0rcu_preempt0-21swapper/020:01:040
81570,0rcu_preempt3-21ksoftirqd/019:47:240
81570,0rcu_preempt3-21ksoftirqd/019:25:120
81570,0rcu_preempt19-21ksoftirqd/122:43:131
81570,0rcu_preempt0-21swapper/123:13:471
81570,0rcu_preempt0-21swapper/021:52:430
81560,0rcu_preempt3-21ksoftirqd/023:31:410
81560,0rcu_preempt24837-21diskmemload23:35:231
81560,0rcu_preempt24837-21diskmemload23:35:231
81560,0rcu_preempt19-21ksoftirqd/119:39:581
81560,0rcu_preempt0-21swapper/021:09:260
81550,0rcu_preempt3-21ksoftirqd/022:02:110
81550,0rcu_preempt3-21ksoftirqd/000:19:440
81550,0rcu_preempt19-21ksoftirqd/122:11:441
81550,0rcu_preempt0-21swapper/022:40:470
81540,0rcu_preempt3-21ksoftirqd/022:15:340
81540,0rcu_preempt3-21ksoftirqd/022:07:180
81540,0rcu_preempt3-21ksoftirqd/021:19:230
81540,0rcu_preempt2801-21df_abs21:20:111
81540,0rcu_preempt21135-21ping19:42:120
81540,0rcu_preempt19-21ksoftirqd/122:46:001
81540,0rcu_preempt19-21ksoftirqd/122:32:321
81540,0rcu_preempt0-21swapper/000:06:020
81530,0rcu_preempt3-21ksoftirqd/021:30:100
81530,0rcu_preempt3-21ksoftirqd/000:00:340
81530,0rcu_preempt0-21swapper/022:55:080
81530,0rcu_preempt0-21swapper/021:14:480
81520,0rcu_preempt3-21ksoftirqd/000:25:160
81520,0rcu_preempt19-21ksoftirqd/123:45:181
81520,0rcu_preempt16354-21apt-get19:05:080
81520,0rcu_preempt0-21swapper/023:11:190
81510,0rcu_preempt836-21rngd00:35:280
81510,0rcu_preempt3-21ksoftirqd/023:42:010
81510,0rcu_preempt3-21ksoftirqd/022:49:190
81510,0rcu_preempt3-21ksoftirqd/022:38:090
81510,0rcu_preempt3-21ksoftirqd/021:36:300
81510,0rcu_preempt3-21ksoftirqd/000:20:100
81510,0rcu_preempt19-21ksoftirqd/100:30:271
81510,0rcu_preempt0-21swapper/022:30:480
81500,0rcu_preempt3-21ksoftirqd/023:25:140
81500,0rcu_preempt3-21ksoftirqd/021:59:520
81500,0rcu_preempt3-21ksoftirqd/020:25:090
81500,0rcu_preempt3-21ksoftirqd/020:20:100
81500,0rcu_preempt19-21ksoftirqd/123:03:301
81500,0rcu_preempt0-21swapper/021:43:500
81490,0rcu_preempt8845-21php-cgi20:20:161
81490,0rcu_preempt30071-21ssh21:15:091
81490,0rcu_preempt24837-21diskmemload23:20:291
81490,0rcu_preempt19-21ksoftirqd/120:05:261
81490,0rcu_preempt19-21ksoftirqd/119:44:491
81490,0rcu_preempt19-21ksoftirqd/119:29:571
81490,0rcu_preempt19-21ksoftirqd/100:35:181
81490,0rcu_preempt19-21ksoftirqd/100:10:251
81490,0rcu_preempt19-21ksoftirqd/100:10:251
81490,0rcu_preempt0-21swapper/021:26:280
81480,0rcu_preempt0-21swapper/000:11:230
81480,0rcu_preempt0-21swapper/000:11:230
81470,0rcu_preempt3-21ksoftirqd/020:55:240
81470,0rcu_preempt3-21ksoftirqd/020:15:260
81470,0rcu_preempt2224-21php-cgi22:25:171
81470,0rcu_preempt19-21ksoftirqd/123:50:181
81460,0rcu_preempt19-21ksoftirqd/123:40:111
81460,0rcu_preempt19-21ksoftirqd/121:50:091
81460,0rcu_preempt19-21ksoftirqd/119:15:231
81450,0rcu_preempt19-21ksoftirqd/100:20:211
10050450,0irq/346-484840015097-1kworker/1:1H21:32:531
81440,0rcu_preempt3-21ksoftirqd/020:59:580
81440,0rcu_preempt19-21ksoftirqd/121:09:581
10050440,0irq/346-484840017857-21cyclictest19:34:571
81430,0rcu_preempt3-21ksoftirqd/023:45:280
81430,0rcu_preempt20242-21df_abs20:55:111
81430,0rcu_preempt19-21ksoftirqd/121:25:161
81430,0rcu_preempt19-21ksoftirqd/120:35:201
81430,0rcu_preempt17439-21runrttasks20:45:221
10050430,0irq/346-484840030938-21ssh00:32:250
10050430,0irq/346-48484001535-21diskstats23:30:151
81410,0rcu_preempt9950irq/345-484840022:19:211
81410,0rcu_preempt31136-21apt-get19:50:091
81410,0rcu_preempt19-21ksoftirqd/120:00:251
81410,0rcu_preempt19-21ksoftirqd/119:05:591
81400,0rcu_preempt0-21swapper/120:50:121
81400,0rcu_preempt0-21swapper/120:50:121
1599400,0migration/04804-21runrttasks20:06:280
10050400,0irq/346-4848400836-21rngd19:11:571
10050400,0irq/346-484840019643-21apt-get19:15:080
10050400,0irq/346-48484000-21swapper/022:29:380
10050400,0irq/346-48484000-21swapper/020:13:140
81390,0rcu_preempt32472-21taskset22:22:561
10050390,0irq/346-48484001445-21runrttasks20:48:430
81380,0rcu_preempt3-21ksoftirqd/020:42:020
81380,0rcu_preempt22751-21users21:00:261
81380,0rcu_preempt19-21ksoftirqd/120:15:191
81380,0rcu_preempt0-21swapper/120:30:211
81370,0rcu_preempt0-21swapper/120:40:111
1785999371,0cyclictest1608-21ping19:59:200
10050370,0irq/346-484840014979-21munin-run20:39:570
9950360,0irq/345-48484000-21swapper/019:50:110
81350,0rcu_preempt0-21swapper/119:55:211
81340,0rcu_preempt0-21swapper/119:47:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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