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2025-12-04 - 17:12

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 100 highest latencies:
System rackaslot5s.osadl.org (updated Thu Dec 04, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81880,0rcu_preempt3-21ksoftirqd/010:29:300
81870,0rcu_preempt5268-21apt-get08:59:340
81870,0rcu_preempt5268-21apt-get08:59:340
81870,0rcu_preempt3-21ksoftirqd/011:59:350
81860,0rcu_preempt3-21ksoftirqd/011:34:430
81860,0rcu_preempt3-21ksoftirqd/010:59:430
81820,0rcu_preempt3-21ksoftirqd/009:42:450
81820,0rcu_preempt3-21ksoftirqd/009:42:450
81820,0rcu_preempt19070-21munin-node0
81800,0rcu_preempt3-21ksoftirqd/009:44:540
81790,0rcu_preempt3-21ksoftirqd/008:04:390
81770,0rcu_preempt3-21ksoftirqd/010:52:250
81760,0rcu_preempt3-21ksoftirqd/008:39:360
81760,0rcu_preempt3-21ksoftirqd/008:29:350
9950750,0irq/345-4848400171rcuc/109:29:541
81750,0rcu_preempt3-21ksoftirqd/012:14:520
81750,0rcu_preempt3-21ksoftirqd/009:34:370
81750,0rcu_preempt3-21ksoftirqd/008:14:340
273582750,0sleep010050irq/346-484840008:26:030
81740,0rcu_preempt3-21ksoftirqd/010:19:370
81740,0rcu_preempt3-21ksoftirqd/010:03:210
81740,0rcu_preempt3-21ksoftirqd/009:29:230
81740,0rcu_preempt3-21ksoftirqd/008:21:050
81730,0rcu_preempt3-21ksoftirqd/012:23:470
81730,0rcu_preempt3-21ksoftirqd/011:12:490
81730,0rcu_preempt1485-21cyclictest11:49:400
81700,0rcu_preempt54-21kswapd010:24:410
81700,0rcu_preempt3-21ksoftirqd/011:29:520
81690,0rcu_preempt3-21ksoftirqd/012:34:410
81690,0rcu_preempt3-21ksoftirqd/010:06:000
81680,0rcu_preempt3-21ksoftirqd/012:28:040
81680,0rcu_preempt3-21ksoftirqd/009:22:130
10050680,0irq/346-4848400181ktimersoftd/111:45:561
81670,0rcu_preempt3-21ksoftirqd/010:39:510
81670,0rcu_preempt3-21ksoftirqd/008:54:520
81660,0rcu_preempt799-21apt-get11:14:360
81660,0rcu_preempt3-21ksoftirqd/011:39:370
81660,0rcu_preempt3-21ksoftirqd/011:19:560
81660,0rcu_preempt3-21ksoftirqd/010:44:540
81650,0rcu_preempt3-21ksoftirqd/012:08:340
81650,0rcu_preempt3-21ksoftirqd/010:57:320
81650,0rcu_preempt3-21ksoftirqd/010:57:320
286802650,0sleep09950irq/345-484840011:07:530
286802650,0sleep09950irq/345-484840011:07:530
10050640,0irq/346-484840023381-1kworker/0:1H12:32:180
9950630,0irq/345-4848400181ktimersoftd/108:55:591
81630,0rcu_preempt3-21ksoftirqd/009:14:500
10050630,0irq/346-484840054-21kswapd011:00:361
10050620,0irq/346-484840019943-1kworker/1:3H12:29:221
10050620,0irq/346-484840012649-1kworker/1:3H10:01:231
9950610,0irq/345-4848400181ktimersoftd/110:24:321
10050610,0irq/346-484840027348-1kworker/1:1H12:30:591
81600,0rcu_preempt3-21ksoftirqd/010:15:280
81590,0rcu_preempt3-21ksoftirqd/009:58:220
178222590,0sleep010050irq/346-484840007:59:220
10050590,0irq/346-4848400751-21rngd10:12:240
10050590,0irq/346-48484004461-1kworker/1:0H12:06:171
10050590,0irq/346-48484002305-1kworker/1:0H09:46:101
81580,0rcu_preempt3-21ksoftirqd/011:46:250
10050580,0irq/346-484840054-21kswapd010:06:121
10050580,0irq/346-484840017876-1kworker/1:0H11:51:121
10050580,0irq/346-484840017876-1kworker/1:0H11:43:231
81570,0rcu_preempt3-21ksoftirqd/008:44:350
81570,0rcu_preempt3-21ksoftirqd/007:09:350
10050570,0irq/346-484840054-21kswapd009:14:061
10050570,0irq/346-48484003960-21dropbear10:34:400
10050570,0irq/346-484840031465-1kworker/1:1H11:15:271
10050570,0irq/346-484840028000-1kworker/1:0H11:10:441
81560,0rcu_preempt9321-1kworker/0:3H07:34:390
81560,0rcu_preempt15742-21kworker/0:109:29:250
10050560,0irq/346-484840025525-1kworker/1:1H12:18:571
10050560,0irq/346-484840014020-1kworker/1:1H11:36:241
81540,0rcu_preempt8329-21apt-get11:24:340
81540,0rcu_preempt32550-1kworker/0:0H11:56:030
81540,0rcu_preempt3-21ksoftirqd/009:49:490
81540,0rcu_preempt3-21ksoftirqd/009:12:280
81540,0rcu_preempt3-21ksoftirqd/008:34:390
6322540,0sleep19950irq/345-484840011:56:361
111912540,0chrt9950irq/345-484840012:10:010
10050540,0irq/346-48484005641-1kworker/1:4H10:48:111
10050540,0irq/346-484840054-21kswapd010:32:011
10050540,0irq/346-484840054-21kswapd009:51:051
10050540,0irq/346-484840054-21kswapd009:19:421
10050540,0irq/346-484840031064-1kworker/1:3H09:42:221
10050540,0irq/346-484840031064-1kworker/1:3H09:42:221
10050530,0irq/346-484840028001-1kworker/1:2H11:08:281
10050530,0irq/346-484840028001-1kworker/1:2H11:08:281
10050530,0irq/346-484840021586-1kworker/1:1H10:14:451
10050530,0irq/346-484840018713-21ssh12:19:521
81520,0rcu_preempt9950irq/345-484840007:37:111
81520,0rcu_preempt3-21ksoftirqd/009:04:490
65592520,0sleep09950irq/345-484840007:24:360
10050520,0irq/346-4848400563-1kworker/1:3H12:00:331
81510,0rcu_preempt3-21ksoftirqd/007:30:570
10050510,0irq/346-484840081rcu_preempt07:45:040
10050510,0irq/346-4848400751-21rngd09:16:231
10050510,0irq/346-48484005748-21ssh10:36:281
10050510,0irq/346-484840031401-21ssh12:35:361
10050510,0irq/346-484840028696-21ssh09:38:301
10050510,0irq/346-484840010286-1kworker/1:2H11:28:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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