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2026-07-18 - 19:12

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 Sat Jul 18, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811620,0rcu_preempt3-21ksoftirqd/011:14:390
811400,0rcu_preempt54-21kswapd012:32:280
811400,0rcu_preempt3-21ksoftirqd/010:08:070
811380,0rcu_preempt3-21ksoftirqd/011:29:480
811340,0rcu_preempt3-21ksoftirqd/009:23:250
81870,0rcu_preempt3-21ksoftirqd/008:02:550
81870,0rcu_preempt3-21ksoftirqd/007:58:520
81850,0rcu_preempt11365-21kworker/0:111:07:270
81840,0rcu_preempt3-21ksoftirqd/011:04:420
81840,0rcu_preempt3-21ksoftirqd/010:52:170
81840,0rcu_preempt3-21ksoftirqd/009:10:020
81830,0rcu_preempt3-21ksoftirqd/012:02:160
81830,0rcu_preempt3-21ksoftirqd/011:21:130
81830,0rcu_preempt3-21ksoftirqd/010:17:000
81830,0rcu_preempt3-21ksoftirqd/010:17:000
81830,0rcu_preempt3-21ksoftirqd/009:57:100
81830,0rcu_preempt10240-21apt-get09:42:120
81820,0rcu_preempt3-21ksoftirqd/012:09:110
81820,0rcu_preempt3-21ksoftirqd/010:45:500
81820,0rcu_preempt3-21ksoftirqd/008:29:510
81810,0rcu_preempt3-21ksoftirqd/010:50:320
81810,0rcu_preempt3-21ksoftirqd/009:12:270
81810,0rcu_preempt32110-21apt-get10:37:100
81800,0rcu_preempt3-21ksoftirqd/012:12:100
81800,0rcu_preempt3-21ksoftirqd/011:32:000
81800,0rcu_preempt3-21ksoftirqd/010:27:550
81800,0rcu_preempt3-21ksoftirqd/010:02:110
81800,0rcu_preempt3-21ksoftirqd/009:54:500
81800,0rcu_preempt1685-21kworker/0:012:24:150
81790,0rcu_preempt3-21ksoftirqd/011:01:030
81790,0rcu_preempt3-21ksoftirqd/010:33:440
81790,0rcu_preempt3-21ksoftirqd/009:47:280
81790,0rcu_preempt3-21ksoftirqd/009:18:350
81790,0rcu_preempt3-21ksoftirqd/008:24:460
10050790,0irq/346-4848400851-21rngd12:18:180
81770,0rcu_preempt3-21ksoftirqd/011:57:440
81770,0rcu_preempt3-21ksoftirqd/009:30:130
81770,0rcu_preempt23390-21kworker/0:110:12:250
81760,0rcu_preempt3-21ksoftirqd/011:52:270
81760,0rcu_preempt3-21ksoftirqd/011:48:380
81760,0rcu_preempt3-21ksoftirqd/011:46:480
81760,0rcu_preempt3-21ksoftirqd/011:46:480
81760,0rcu_preempt3-21ksoftirqd/009:01:290
81760,0rcu_preempt3-21ksoftirqd/008:37:100
81760,0rcu_preempt3-21ksoftirqd/008:12:560
81750,0rcu_preempt505-21taskset09:32:120
81750,0rcu_preempt3-21ksoftirqd/007:11:360
81750,0rcu_preempt31851-21kworker/0:109:40:350
81740,0rcu_preempt54-21kswapd011:37:130
81740,0rcu_preempt3-21ksoftirqd/012:29:440
81740,0rcu_preempt3-21ksoftirqd/008:33:580
81740,0rcu_preempt3-21ksoftirqd/008:33:580
81730,0rcu_preempt54-21kswapd008:17:280
81730,0rcu_preempt3-21ksoftirqd/010:25:340
81730,0rcu_preempt3-21ksoftirqd/008:42:530
81730,0rcu_preempt3-21ksoftirqd/008:09:490
81720,0rcu_preempt10457-21kworker/0:107:42:360
81710,0rcu_preempt3-21ksoftirqd/007:12:410
81700,0rcu_preempt3-21ksoftirqd/008:49:480
81680,0rcu_preempt3-21ksoftirqd/008:52:190
81680,0rcu_preempt3-21ksoftirqd/008:52:190
81680,0rcu_preempt3-21ksoftirqd/007:29:050
10050670,0irq/346-4848400181ktimersoftd/111:48:131
10050660,0irq/346-4848400181ktimersoftd/109:54:211
10050660,0irq/346-4848400181ktimersoftd/107:59:221
10050650,0irq/346-4848400171rcuc/112:14:461
10050650,0irq/346-4848400171rcuc/109:35:161
9950640,0irq/345-4848400171rcuc/109:31:261
81640,0rcu_preempt54-21kswapd007:21:590
10050640,0irq/346-4848400171rcuc/110:50:221
10050620,0irq/346-4848400181ktimersoftd/111:59:011
10050620,0irq/346-4848400181ktimersoftd/111:16:271
81610,0rcu_preempt19-21ksoftirqd/108:32:221
81610,0rcu_preempt19-21ksoftirqd/108:32:221
10050610,0irq/346-484840054-21kswapd011:52:271
81600,0rcu_preempt11595-21cut11:22:000
10050600,0irq/346-4848400171rcuc/110:05:321
81590,0rcu_preempt10457-21kworker/0:107:47:100
10050590,0irq/346-4848400171rcuc/112:36:071
10050590,0irq/346-4848400171rcuc/111:25:181
10050580,0irq/346-4848400181ktimersoftd/109:49:011
10050560,0irq/346-4848400171rcuc/111:18:071
10050550,0irq/346-4848400171rcuc/112:17:251
10050550,0irq/346-4848400171rcuc/110:59:081
81540,0rcu_preempt3-21ksoftirqd/007:37:350
10050540,0irq/346-484840054-21kswapd010:54:241
10050540,0irq/346-4848400171rcuc/111:37:581
9950530,0irq/345-4848400171rcuc/110:18:371
9950530,0irq/345-4848400171rcuc/110:18:371
10050530,0irq/346-4848400171rcuc/112:29:061
10050530,0irq/346-4848400171rcuc/110:29:421
10050510,0irq/346-4848400181ktimersoftd/109:41:501
10050510,0irq/346-4848400171rcuc/109:45:371
10050500,0irq/346-4848400171rcuc/111:03:191
10050500,0irq/346-4848400171rcuc/110:23:101
9950490,0irq/345-48484007538-1kworker/0:0H09:06:580
81490,0rcu_preempt19-21ksoftirqd/107:02:151
10050490,0irq/346-48484007539-1kworker/1:0H09:12:481
86599488,0cyclictest895-21runrttasks11:11:061
86599481,0cyclictest7877-21diskmemload11:46:461
86599481,0cyclictest7877-21diskmemload11:46:461
81480,0rcu_preempt19-21ksoftirqd/108:25:351
10050480,0irq/346-4848400181ktimersoftd/110:16:571
10050480,0irq/346-4848400181ktimersoftd/109:25:101
9950470,0irq/345-484840015048-1kworker/1:2H09:18:121
86599479,0cyclictest10050irq/346-484840008:59:221
86599478,0cyclictest25128-21aten_rapower_po09:57:111
81470,0rcu_preempt19-21ksoftirqd/108:14:231
81470,0rcu_preempt19-21ksoftirqd/107:56:071
10050470,0irq/346-48484009840-21ssh09:08:031
86599462,0cyclictest6172-21apt-get12:22:111
86599461,0cyclictest7877-21diskmemload10:37:111
81460,0rcu_preempt6367-21ssh10:43:091
81460,0rcu_preempt4886-21ssh10:09:001
81460,0rcu_preempt19-21ksoftirqd/107:37:201
86599459,0cyclictest22425-21ssh11:32:241
86599458,0cyclictest6578-21ssh09:02:131
86599458,0cyclictest24627-21munin-node1
81450,0rcu_preempt19-21ksoftirqd/108:10:221
81450,0rcu_preempt19-21ksoftirqd/107:32:091
86599449,0cyclictest9950irq/345-484840007:47:151
86599449,0cyclictest31727-1kworker/1:0H08:56:311
86599449,0cyclictest31727-1kworker/1:0H08:56:311
86599447,0cyclictest27854-21diskmemload10:32:231
86599447,0cyclictest1213-21runrttasks08:46:121
86599446,0cyclictest14002-1kworker/1:2H11:27:161
86599442,0cyclictest18821-21apt-get12:02:101
864994415,0cyclictest15296-1kworker/0:2H07:52:240
81440,0rcu_preempt19-21ksoftirqd/108:03:251
10050430,0irq/346-484840031362-1kworker/0:2H07:02:150
86599429,0cyclictest1679-21munin-node1
86599428,0cyclictest3890-1kworker/1:0H07:14:571
86599422,0cyclictest24274-21runrttasks08:17:161
86599422,0cyclictest13787-21taskset07:44:371
86599422,0cyclictest0-21swapper/108:37:101
86599416,0cyclictest7829-21taskset07:27:191
86599416,0cyclictest54-21kswapd007:26:191
86599416,0cyclictest54-21kswapd007:26:191
86499412,0cyclictest0-21swapper/007:22:310
86499412,0cyclictest0-21swapper/007:22:310
864994111,0cyclictest0-21swapper/007:33:210
86599402,0cyclictest27877-21meminfo08:27:221
86599402,0cyclictest1724-21lighttpd08:47:171
86599392,0cyclictest4177-21ping07:17:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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