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2025-12-09 - 01:12

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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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 Dec 08, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811020,0rcu_preempt3-21ksoftirqd/011:29:210
81990,0rcu_preempt19-21ksoftirqd/110:48:181
211872950,0sleep010050irq/346-484840008:08:110
81890,0rcu_preempt19-21ksoftirqd/111:16:151
81880,0rcu_preempt19-21ksoftirqd/112:09:451
179772850,0sleep010050irq/346-484840007:58:590
81830,0rcu_preempt19-21ksoftirqd/110:54:041
81820,0rcu_preempt19-21ksoftirqd/110:30:571
81800,0rcu_preempt19-21ksoftirqd/110:24:021
81780,0rcu_preempt19-21ksoftirqd/110:40:591
81770,0rcu_preempt19-21ksoftirqd/110:10:451
81770,0rcu_preempt19-21ksoftirqd/109:39:221
214402770,0sleep010050irq/346-484840008:09:250
81760,0rcu_preempt19-21ksoftirqd/111:49:511
81730,0rcu_preempt19-21ksoftirqd/112:09:191
81720,0rcu_preempt31287-21apt-get08:39:310
81720,0rcu_preempt19-21ksoftirqd/110:34:431
81710,0rcu_preempt3-21ksoftirqd/009:09:330
81710,0rcu_preempt28114-1kworker/1:3H12:37:421
81710,0rcu_preempt19-21ksoftirqd/110:59:401
81710,0rcu_preempt19-21ksoftirqd/109:24:461
244712710,0sleep010050irq/346-484840008:18:240
81700,0rcu_preempt19-21ksoftirqd/111:43:331
81700,0rcu_preempt19-21ksoftirqd/110:14:521
81690,0rcu_preempt19-21ksoftirqd/112:27:381
81680,0rcu_preempt3-21ksoftirqd/010:49:230
81680,0rcu_preempt19-21ksoftirqd/110:28:251
81680,0rcu_preempt19-21ksoftirqd/107:59:231
81670,0rcu_preempt19-21ksoftirqd/111:47:281
81670,0rcu_preempt19-21ksoftirqd/107:31:111
81670,0rcu_preempt19-21ksoftirqd/107:31:111
81660,0rcu_preempt3-21ksoftirqd/012:20:090
81660,0rcu_preempt3-21ksoftirqd/009:54:500
81650,0rcu_preempt3-21ksoftirqd/012:18:290
81650,0rcu_preempt19-21ksoftirqd/111:20:051
81650,0rcu_preempt19-21ksoftirqd/107:24:191
81640,0rcu_preempt19-21ksoftirqd/109:54:451
81630,0rcu_preempt24219-1kworker/1:1H08:19:221
261382630,0sleep010050irq/346-484840008:23:370
81620,0rcu_preempt54-21kswapd010:28:250
193092620,0sleep010050irq/346-484840008:00:300
81600,0rcu_preempt3-21ksoftirqd/011:36:520
81600,0rcu_preempt3-21ksoftirqd/011:36:520
81600,0rcu_preempt19-21ksoftirqd/109:19:031
166499608,0cyclictest6916-21dropbear07:24:350
81590,0rcu_preempt19-21ksoftirqd/111:31:561
81590,0rcu_preempt19-21ksoftirqd/110:07:111
81590,0rcu_preempt11123-21kworker/1:010:04:031
125012590,0sleep19950irq/345-484840012:16:121
81580,0rcu_preempt3-21ksoftirqd/009:14:400
81580,0rcu_preempt19-21ksoftirqd/110:57:191
81570,0rcu_preempt3-21ksoftirqd/008:34:450
81570,0rcu_preempt19-21ksoftirqd/112:30:181
81570,0rcu_preempt19-21ksoftirqd/109:23:511
81570,0rcu_preempt19-21ksoftirqd/108:57:471
81570,0rcu_preempt19-21ksoftirqd/108:57:471
81570,0rcu_preempt19-21ksoftirqd/108:07:531
1664995711,0cyclictest4081-21dropbear10:34:350
81560,0rcu_preempt54-21kswapd011:41:510
81560,0rcu_preempt19-21ksoftirqd/112:24:051
81560,0rcu_preempt19-21ksoftirqd/111:54:431
81560,0rcu_preempt19-21ksoftirqd/109:50:501
81560,0rcu_preempt19-21ksoftirqd/108:09:401
233202560,0sleep09950irq/345-484840011:46:300
81550,0rcu_preempt3-21ksoftirqd/010:29:370
324082550,0chrt9950irq/345-484840009:44:210
1664995512,0cyclictest751-21rngd10:43:110
81540,0rcu_preempt11210-21df_inode09:59:360
10050540,0irq/346-4848400111rcuc/008:54:190
81530,0rcu_preempt3-21ksoftirqd/009:04:380
81530,0rcu_preempt19-21ksoftirqd/109:33:451
167962530,0sleep19950irq/345-484840011:38:051
167962530,0sleep19950irq/345-484840011:38:051
9950520,0irq/345-484840054-21kswapd011:14:460
81520,0rcu_preempt3-21ksoftirqd/012:13:160
13150520,0irq/301-480200022076-21sh10:14:380
10050520,0irq/346-48484001663-21cyclictest12:05:390
9950510,0irq/345-4848400751-21rngd12:34:520
81510,0rcu_preempt4936-21ping07:36:501
81510,0rcu_preempt3-21ksoftirqd/010:09:500
81510,0rcu_preempt3-21ksoftirqd/009:49:360
1664995114,0cyclictest0-21swapper/012:29:320
13150510,0irq/301-480200054-21kswapd007:39:400
166499504,0cyclictest0-21swapper/010:46:570
10050500,0irq/346-484840054-21kswapd010:21:560
9950490,0irq/345-48484003-21ksoftirqd/007:19:400
9950490,0irq/345-48484001418-1kworker/0:0H11:19:460
81490,0rcu_preempt3-21ksoftirqd/011:49:510
81490,0rcu_preempt3-21ksoftirqd/011:09:340
81490,0rcu_preempt3-21ksoftirqd/009:30:020
81490,0rcu_preempt19-21ksoftirqd/109:09:451
1665994933,0cyclictest28583-21ssh11:09:311
1664994919,0cyclictest15715-21munin-node0
10050490,0irq/346-484840026650-1kworker/0:2H11:54:330
81480,0rcu_preempt3-21ksoftirqd/011:59:320
81480,0rcu_preempt25906-21apt-get09:34:310
81480,0rcu_preempt21963-21apt-get10:59:340
1665994833,0cyclictest26165-21munin-node1
1665994833,0cyclictest26165-21munin-node1
10050480,0irq/346-484840054-21kswapd009:24:450
10050480,0irq/346-484840054-21kswapd008:29:390
10050480,0irq/346-484840030247-1kworker/0:2H11:25:400
9950470,0irq/345-484840041ktimersoftd/011:09:070
9950470,0irq/345-484840041ktimersoftd/011:09:070
9950470,0irq/345-48484000-21swapper/007:04:360
81470,0rcu_preempt751-21rngd07:14:330
81470,0rcu_preempt3-21ksoftirqd/008:54:350
81470,0rcu_preempt3-21ksoftirqd/008:54:350
81470,0rcu_preempt1810-21munin-node0
1665994728,0cyclictest0-21swapper/108:34:311
166499479,0cyclictest9995-21apt-get07:34:320
1664994713,0cyclictest0-21swapper/012:24:430
10050470,0irq/346-484840054-21kswapd010:54:450
10050470,0irq/346-484840054-21kswapd009:39:370
10050470,0irq/346-484840015008-1kworker/0:0H10:05:540
81460,0rcu_preempt3-21ksoftirqd/008:59:210
81460,0rcu_preempt3-21ksoftirqd/008:26:190
1665994630,0cyclictest32648-21rm11:59:471
1665994630,0cyclictest0-21swapper/109:34:321
1665994629,0cyclictest0-21swapper/108:24:301
81450,0rcu_preempt3-21ksoftirqd/007:29:310
81450,0rcu_preempt3-21ksoftirqd/007:29:310
1665994529,0cyclictest16128-1kworker/1:0H07:54:451
81440,0rcu_preempt19-21ksoftirqd/108:59:411
81440,0rcu_preempt19-21ksoftirqd/107:40:081
81440,0rcu_preempt19-21ksoftirqd/107:27:011
1665994430,0cyclictest4936-21ping07:44:351
1665994430,0cyclictest4936-21ping07:44:351
1665994429,0cyclictest31231-21latency_hist08:39:211
1665994428,0cyclictest2933-1kworker/1:4H07:13:341
166499448,0cyclictest13516-21fschecks_count07:44:420
166499448,0cyclictest13516-21fschecks_count07:44:420
1665994329,0cyclictest6808-21apt-get11:24:321
1665994328,0cyclictest1369-21runrttasks09:09:071
1665994328,0cyclictest1369-21runrttasks07:17:591
1665994326,0cyclictest2159-21apt-get08:49:321
1665994321,0cyclictest9950irq/345-484840009:44:321
1665994228,0cyclictest23296-21diskstats08:14:371
166499429,0cyclictest30775-1kworker/0:1H08:44:440
1665994123,0cyclictest14906-21apt-get07:49:321
1665994025,0cyclictest27505-1kworker/1:1H08:29:331
1665993924,0cyclictest32520-1kworker/1:1H08:44:451
166499397,0cyclictest12864-1kworker/0:1H07:50:470
10050360,0irq/346-48484001376-1kworker/1:3H07:07:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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