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2025-12-24 - 00:17

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 Tue Dec 23, 2025 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811180,0rcu_preempt0-21swapper/010:38:500
811060,0rcu_preempt10346-21diskmemload09:56:491
1999221050,0sleep09950irq/345-484840008:00:060
265402880,0sleep19950irq/345-484840010:40:101
154602830,0sleep19950irq/345-484840012:16:021
81740,0rcu_preempt19-21ksoftirqd/110:38:071
229482740,0chrt9950irq/345-484840009:23:400
81730,0rcu_preempt10346-21diskmemload09:32:581
81720,0rcu_preempt10346-21diskmemload12:22:301
81700,0rcu_preempt19-21ksoftirqd/111:00:321
81700,0rcu_preempt0-21swapper/111:11:131
144172700,0sleep19950irq/345-484840010:25:361
81680,0rcu_preempt811-21rngd11:26:011
81680,0rcu_preempt3-21ksoftirqd/008:55:280
81680,0rcu_preempt0-21swapper/112:07:061
81670,0rcu_preempt19-21ksoftirqd/112:35:321
81670,0rcu_preempt19-21ksoftirqd/112:32:361
81670,0rcu_preempt19-21ksoftirqd/107:25:151
81670,0rcu_preempt10346-21diskmemload11:15:131
81670,0rcu_preempt0-21swapper/110:12:141
81660,0rcu_preempt19-21ksoftirqd/112:28:201
81660,0rcu_preempt19-21ksoftirqd/109:42:341
81660,0rcu_preempt19-21ksoftirqd/109:16:081
81660,0rcu_preempt19-21ksoftirqd/108:35:271
81650,0rcu_preempt19-21ksoftirqd/111:38:241
256122650,0chrt9950irq/345-484840012:27:580
81640,0rcu_preempt10346-21diskmemload11:52:371
81630,0rcu_preempt3-21ksoftirqd/010:45:200
81630,0rcu_preempt3-21ksoftirqd/009:40:100
81630,0rcu_preempt19-21ksoftirqd/109:20:201
81630,0rcu_preempt19-21ksoftirqd/108:00:221
81630,0rcu_preempt10346-21diskmemload11:09:421
81630,0rcu_preempt10346-21diskmemload11:09:421
81630,0rcu_preempt10346-21diskmemload10:02:471
81630,0rcu_preempt10346-21diskmemload09:37:361
81630,0rcu_preempt10346-21diskmemload09:10:051
316912630,0chrt9950irq/345-484840010:09:461
269662630,0chrt9950irq/345-484840010:04:220
10050630,0irq/346-484840019-21ksoftirqd/110:21:221
81620,0rcu_preempt19-21ksoftirqd/110:31:371
81620,0rcu_preempt10346-21diskmemload11:43:331
81620,0rcu_preempt10346-21diskmemload11:34:421
81620,0rcu_preempt10346-21diskmemload11:21:151
81620,0rcu_preempt10346-21diskmemload10:55:201
81620,0rcu_preempt10346-21diskmemload10:55:201
81620,0rcu_preempt10346-21diskmemload10:17:331
81610,0rcu_preempt19-21ksoftirqd/112:01:251
81610,0rcu_preempt19-21ksoftirqd/111:56:311
81610,0rcu_preempt19-21ksoftirqd/111:56:311
81610,0rcu_preempt19-21ksoftirqd/110:45:131
81610,0rcu_preempt19-21ksoftirqd/109:50:031
81610,0rcu_preempt19-21ksoftirqd/109:27:531
81610,0rcu_preempt10346-21diskmemload11:50:001
81610,0rcu_preempt10346-21diskmemload09:48:441
77212610,0sleep09950irq/345-484840011:30:590
81600,0rcu_preempt3-21ksoftirqd/012:14:330
81600,0rcu_preempt3-21ksoftirqd/012:02:560
81600,0rcu_preempt3-21ksoftirqd/011:08:490
81600,0rcu_preempt3-21ksoftirqd/011:08:490
81600,0rcu_preempt3-21ksoftirqd/011:00:210
81600,0rcu_preempt19-21ksoftirqd/109:09:591
81600,0rcu_preempt10346-21diskmemload10:50:421
81590,0rcu_preempt3-21ksoftirqd/012:05:170
81590,0rcu_preempt3-21ksoftirqd/011:42:090
81590,0rcu_preempt3-21ksoftirqd/011:35:280
81590,0rcu_preempt3-21ksoftirqd/010:30:100
81590,0rcu_preempt3-21ksoftirqd/009:55:110
81590,0rcu_preempt3-21ksoftirqd/009:52:100
81590,0rcu_preempt3-21ksoftirqd/009:15:180
81590,0rcu_preempt24909-21kworker/0:211:16:250
81590,0rcu_preempt11340-1kworker/0:1H07:33:510
10050590,0irq/346-484840025316-1kworker/0:4H10:05:210
81580,0rcu_preempt3-21ksoftirqd/012:18:050
81580,0rcu_preempt3-21ksoftirqd/011:54:010
81580,0rcu_preempt3-21ksoftirqd/011:45:120
81580,0rcu_preempt3-21ksoftirqd/010:28:060
27712580,0sleep09950irq/345-484840010:13:170
10050580,0irq/346-484840015322-1kworker/0:1H10:40:260
163382570,0sleep010050irq/346-484840007:47:370
81560,0rcu_preempt5255-21apt-get07:15:080
81560,0rcu_preempt3-21ksoftirqd/011:20:110
81560,0rcu_preempt3-21ksoftirqd/011:10:100
81560,0rcu_preempt3-21ksoftirqd/009:25:130
81560,0rcu_preempt0-21swapper/112:13:171
81550,0rcu_preempt3-21ksoftirqd/010:53:280
81550,0rcu_preempt3-21ksoftirqd/009:12:060
81550,0rcu_preempt3-21ksoftirqd/008:45:170
149032550,0sleep010050irq/346-484840007:44:470
83452540,0sleep010050irq/346-484840007:24:330
81540,0rcu_preempt54-21kswapd012:34:290
262342540,0sleep010050irq/346-484840008:18:260
9950530,0irq/345-48484006743-21cron07:19:591
9950530,0irq/345-48484000-21swapper/011:26:040
81530,0rcu_preempt3-21ksoftirqd/012:20:080
81530,0rcu_preempt3-21ksoftirqd/010:20:120
81530,0rcu_preempt3-21ksoftirqd/009:35:260
10050530,0irq/346-48484003804-1kworker/0:1H08:50:140
81520,0rcu_preempt9406-21kworker/0:210:59:500
81520,0rcu_preempt9406-21kworker/0:210:59:500
81520,0rcu_preempt3-21ksoftirqd/012:38:290
81520,0rcu_preempt3-21ksoftirqd/011:55:130
81520,0rcu_preempt3-21ksoftirqd/011:55:130
81520,0rcu_preempt3-21ksoftirqd/009:47:360
81520,0rcu_preempt22582-21kworker/0:209:31:240
81510,0rcu_preempt3-21ksoftirqd/010:18:160
81510,0rcu_preempt3-21ksoftirqd/008:08:290
81510,0rcu_preempt26415-21kworker/0:208:25:290
81510,0rcu_preempt1427-21runrttasks08:22:540
81500,0rcu_preempt3-21ksoftirqd/008:35:260
81490,0rcu_preempt638-21munin-node0
81490,0rcu_preempt3-21ksoftirqd/007:59:400
81490,0rcu_preempt1981-21apt-get07:05:100
81490,0rcu_preempt19-21ksoftirqd/108:10:271
81480,0rcu_preempt7239-21apt-get09:00:110
9950470,0irq/345-48484000-21swapper/109:00:001
81470,0rcu_preempt6750-21ping07:25:090
81470,0rcu_preempt3-21ksoftirqd/008:30:250
81470,0rcu_preempt3-21ksoftirqd/007:10:300
81470,0rcu_preempt24576-21kworker/0:108:15:000
10050470,0irq/346-48484006750-21ping07:39:590
9950460,0irq/345-48484001981-21apt-get07:05:101
81460,0rcu_preempt19-21ksoftirqd/108:05:131
81460,0rcu_preempt19-21ksoftirqd/107:58:371
10050460,0irq/346-48484008415-1kworker/0:0H09:05:270
81450,0rcu_preempt29819-21apt-get08:30:101
81450,0rcu_preempt19-21ksoftirqd/108:20:231
81450,0rcu_preempt19-21ksoftirqd/107:41:521
81450,0rcu_preempt19-21ksoftirqd/107:30:201
81440,0rcu_preempt3-21ksoftirqd/007:50:090
81440,0rcu_preempt19-21ksoftirqd/108:15:151
81440,0rcu_preempt1775-21php-cgi08:40:481
81420,0rcu_preempt19-21ksoftirqd/107:53:521
81420,0rcu_preempt19-21ksoftirqd/107:36:201
81410,0rcu_preempt19-21ksoftirqd/107:20:211
81390,0rcu_preempt19-21ksoftirqd/108:28:591
81390,0rcu_preempt19-21ksoftirqd/107:45:241
78192390,0sleep19950irq/345-484840009:00:241
81380,0rcu_preempt19-21ksoftirqd/107:10:311
81350,0rcu_preempt19-21ksoftirqd/108:50:171
81330,0rcu_preempt19-21ksoftirqd/108:45:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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