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2025-09-15 - 22:58

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 Mon Sep 15, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811170,0rcu_preempt19-21ksoftirqd/111:42:561
811060,0rcu_preempt0-21swapper/111:09:021
81880,0rcu_preempt7617-21kworker/0:009:12:480
81860,0rcu_preempt19-21ksoftirqd/108:16:071
10050790,0irq/346-4848400111rcuc/009:21:060
9950780,0irq/345-4848400111rcuc/011:46:040
10050780,0irq/346-4848400111rcuc/010:05:310
10050770,0irq/346-484840041ktimersoftd/007:15:420
81760,0rcu_preempt19-21ksoftirqd/111:00:571
9950750,0irq/345-4848400111rcuc/011:42:290
9950740,0irq/345-484840041ktimersoftd/012:35:260
81740,0rcu_preempt3-21ksoftirqd/012:10:000
81740,0rcu_preempt3-21ksoftirqd/011:37:470
81740,0rcu_preempt3-21ksoftirqd/011:37:470
10050740,0irq/346-4848400111rcuc/009:19:430
9950730,0irq/345-484840041ktimersoftd/007:56:140
9950730,0irq/345-4848400111rcuc/010:36:590
81730,0rcu_preempt54-21kswapd008:11:180
81730,0rcu_preempt3-21ksoftirqd/012:11:270
81730,0rcu_preempt3-21ksoftirqd/010:42:060
81730,0rcu_preempt3-21ksoftirqd/010:34:520
81730,0rcu_preempt3-21ksoftirqd/010:07:200
81730,0rcu_preempt3-21ksoftirqd/010:07:200
81730,0rcu_preempt3-21ksoftirqd/009:37:190
3208299731,0cyclictest27354-21ssh11:51:150
3208299731,0cyclictest27354-21ssh11:51:150
81720,0rcu_preempt3-21ksoftirqd/012:01:020
81720,0rcu_preempt3-21ksoftirqd/011:29:590
9950710,0irq/345-4848400111rcuc/010:19:140
81710,0rcu_preempt3-21ksoftirqd/011:02:200
9950700,0irq/345-4848400111rcuc/010:27:110
81700,0rcu_preempt753-21rngd09:51:300
81700,0rcu_preempt3-21ksoftirqd/010:50:140
81700,0rcu_preempt3-21ksoftirqd/010:50:140
81700,0rcu_preempt19-21ksoftirqd/111:17:141
81690,0rcu_preempt3-21ksoftirqd/009:42:080
81680,0rcu_preempt3-21ksoftirqd/009:57:220
81680,0rcu_preempt19-21ksoftirqd/108:51:031
9950670,0irq/345-484840041ktimersoftd/011:12:000
81670,0rcu_preempt19-21ksoftirqd/112:31:111
9950660,0irq/345-4848400111rcuc/012:23:530
81660,0rcu_preempt2443-21chrt09:45:530
81660,0rcu_preempt0-21swapper/109:19:511
3208299661,0cyclictest24143-1kworker/0:1H11:17:350
9950640,0irq/345-4848400111rcuc/011:08:520
81640,0rcu_preempt19-21ksoftirqd/110:46:401
81640,0rcu_preempt19-21ksoftirqd/110:46:401
3208299649,0cyclictest0-21swapper/011:24:350
32082996412,0cyclictest10050irq/346-484840012:00:100
32082996310,0cyclictest0-21swapper/011:35:080
3208299625,0cyclictest0-21swapper/009:28:320
32082996211,0cyclictest2964-21ping07:16:560
3208299612,0cyclictest12129-21ssh12:16:550
10050610,0irq/346-484840041ktimersoftd/008:31:050
81600,0rcu_preempt19-21ksoftirqd/110:16:181
81600,0rcu_preempt19-21ksoftirqd/107:53:381
3208299602,0cyclictest0-21swapper/009:06:080
3208299592,0cyclictest6244-1kworker/0:2H07:26:050
3208299591,0cyclictest2964-21ping07:30:590
81580,0rcu_preempt3-21ksoftirqd/009:31:020
81580,0rcu_preempt19-21ksoftirqd/110:30:541
81580,0rcu_preempt19-21ksoftirqd/107:31:031
81570,0rcu_preempt3-21ksoftirqd/008:51:000
81570,0rcu_preempt19-21ksoftirqd/110:56:161
81570,0rcu_preempt19-21ksoftirqd/110:30:391
32082995710,0cyclictest0-21swapper/010:14:140
3208299562,0cyclictest0-21swapper/010:21:190
81540,0rcu_preempt3-21ksoftirqd/010:50:540
81540,0rcu_preempt19-21ksoftirqd/107:55:561
81530,0rcu_preempt19-21ksoftirqd/110:43:491
81530,0rcu_preempt19-21ksoftirqd/107:26:221
81530,0rcu_preempt0-21swapper/109:43:051
81520,0rcu_preempt3-21ksoftirqd/008:55:540
81520,0rcu_preempt19-21ksoftirqd/111:58:081
81520,0rcu_preempt15886-21ping08:07:130
81520,0rcu_preempt0-21swapper/111:13:031
3208299529,0cyclictest10116-21if_eth107:36:080
10050520,0irq/346-484840015796-1kworker/0:1H12:26:100
81510,0rcu_preempt19-21ksoftirqd/111:36:581
81510,0rcu_preempt19-21ksoftirqd/111:36:581
81510,0rcu_preempt0-21swapper/112:09:031
81500,0rcu_preempt27171-21taskset08:26:140
81500,0rcu_preempt19-21ksoftirqd/112:05:411
81500,0rcu_preempt12970-21apt-get07:45:550
81490,0rcu_preempt3-21ksoftirqd/008:05:430
81490,0rcu_preempt3-21ksoftirqd/007:50:570
81490,0rcu_preempt30653-21kworker/u4:209:51:081
81490,0rcu_preempt19837-21users10:56:150
81480,0rcu_preempt3-21ksoftirqd/007:20:560
81480,0rcu_preempt30002-21meminfo08:36:060
81480,0rcu_preempt2588-21kworker/1:008:14:341
81480,0rcu_preempt19-21ksoftirqd/109:36:061
81480,0rcu_preempt19-21ksoftirqd/108:03:301
81470,0rcu_preempt3-21ksoftirqd/009:00:590
81470,0rcu_preempt3-21ksoftirqd/008:16:130
81470,0rcu_preempt19-21ksoftirqd/110:54:291
81470,0rcu_preempt19-21ksoftirqd/110:05:551
81470,0rcu_preempt19-21ksoftirqd/110:05:551
81470,0rcu_preempt19-21ksoftirqd/109:32:141
81470,0rcu_preempt19-21ksoftirqd/108:06:031
81470,0rcu_preempt15886-21ping08:21:140
81460,0rcu_preempt19-21ksoftirqd/108:21:071
10050460,0irq/346-484840030581-21php-cgi07:00:550
81450,0rcu_preempt3-21ksoftirqd/008:46:090
81450,0rcu_preempt19-21ksoftirqd/109:28:251
81450,0rcu_preempt19-21ksoftirqd/109:12:321
81440,0rcu_preempt3-21ksoftirqd/008:41:080
81430,0rcu_preempt966-21lighttpd10:21:061
81430,0rcu_preempt3-21ksoftirqd/007:40:560
81430,0rcu_preempt19-21ksoftirqd/112:12:141
81430,0rcu_preempt19-21ksoftirqd/110:35:551
81430,0rcu_preempt19-21ksoftirqd/110:11:081
81430,0rcu_preempt19-21ksoftirqd/109:21:001
81430,0rcu_preempt19-21ksoftirqd/107:36:161
81420,0rcu_preempt19-21ksoftirqd/110:02:371
81420,0rcu_preempt19-21ksoftirqd/109:59:591
81420,0rcu_preempt19-21ksoftirqd/109:01:031
81420,0rcu_preempt1239-21snmpd11:34:201
81410,0rcu_preempt19-21ksoftirqd/112:16:091
81410,0rcu_preempt19-21ksoftirqd/111:26:031
81410,0rcu_preempt19-21ksoftirqd/109:06:341
81410,0rcu_preempt19-21ksoftirqd/107:43:081
81410,0rcu_preempt19-21ksoftirqd/107:21:121
81410,0rcu_preempt19-21ksoftirqd/107:16:011
81400,0rcu_preempt19-21ksoftirqd/112:27:581
81400,0rcu_preempt19-21ksoftirqd/112:20:591
81400,0rcu_preempt19-21ksoftirqd/111:54:061
81400,0rcu_preempt19-21ksoftirqd/111:54:061
81400,0rcu_preempt19-21ksoftirqd/109:46:031
81400,0rcu_preempt19140-1kworker/1:0H08:45:001
81400,0rcu_preempt1458-21munin-node1
81390,0rcu_preempt19-21ksoftirqd/111:45:561
81390,0rcu_preempt19-21ksoftirqd/111:20:581
81390,0rcu_preempt19-21ksoftirqd/108:36:261
81390,0rcu_preempt19-21ksoftirqd/108:31:071
81380,0rcu_preempt32433-21df_inode07:05:580
81380,0rcu_preempt19-21ksoftirqd/108:47:321
81380,0rcu_preempt19-21ksoftirqd/108:26:241
81380,0rcu_preempt19-21ksoftirqd/107:10:371
81380,0rcu_preempt13466-21irqstats07:46:041
81370,0rcu_preempt19-21ksoftirqd/108:59:051
81370,0rcu_preempt19-21ksoftirqd/107:01:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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