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2025-12-06 - 12:20

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 Sat Dec 06, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
956721130,0sleep09950irq/345-484840021:59:220
81950,0rcu_preempt26398-21kworker/0:023:03:530
81930,0rcu_preempt3-21ksoftirqd/023:49:320
120502920,0sleep010050irq/346-484840020:09:170
81900,0rcu_preempt29582-21kworker/0:022:25:280
81900,0rcu_preempt18928-21kworker/0:121:35:030
81850,0rcu_preempt3-21ksoftirqd/019:19:280
81800,0rcu_preempt3-21ksoftirqd/020:24:280
81790,0rcu_preempt3-21ksoftirqd/000:01:550
81770,0rcu_preempt3-21ksoftirqd/022:40:220
81750,0rcu_preempt3-21ksoftirqd/023:30:530
81750,0rcu_preempt19-21ksoftirqd/122:43:381
81740,0rcu_preempt3-21ksoftirqd/022:44:520
81730,0rcu_preempt3-21ksoftirqd/022:03:010
81720,0rcu_preempt3-21ksoftirqd/022:13:200
81710,0rcu_preempt54-21kswapd019:29:040
81710,0rcu_preempt3-21ksoftirqd/021:44:590
144752700,0sleep19950irq/345-484840022:44:371
81680,0rcu_preempt28128-1kworker/0:1H23:09:440
81670,0rcu_preempt4092-1kworker/0:2H00:37:350
158582670,0sleep09950irq/345-484840000:07:480
221322650,0sleep19950irq/345-484840022:14:001
138122650,0sleep19950irq/345-484840022:04:221
125482640,0sleep09950irq/345-484840021:24:390
81630,0rcu_preempt19-21ksoftirqd/123:32:221
81630,0rcu_preempt19-21ksoftirqd/122:16:201
81620,0rcu_preempt3-21ksoftirqd/021:20:000
81610,0rcu_preempt1144-21ntpd22:27:311
81600,0rcu_preempt19-21ksoftirqd/100:12:191
81600,0rcu_preempt19-21ksoftirqd/100:02:031
81590,0rcu_preempt54-21kswapd019:52:480
81590,0rcu_preempt3-21ksoftirqd/023:17:520
81590,0rcu_preempt3-21ksoftirqd/022:21:290
81590,0rcu_preempt3-21ksoftirqd/021:16:410
81590,0rcu_preempt23334-21apt-get19:04:320
81590,0rcu_preempt19-21ksoftirqd/123:55:231
81590,0rcu_preempt19-21ksoftirqd/122:19:571
168242590,0sleep010050irq/346-484840020:22:400
10050590,0irq/346-484840054-21kswapd019:59:221
10050590,0irq/346-484840054-21kswapd019:59:221
81580,0rcu_preempt54-21kswapd022:33:540
81580,0rcu_preempt54-21kswapd022:33:540
81580,0rcu_preempt3-21ksoftirqd/023:06:220
81580,0rcu_preempt3-21ksoftirqd/022:54:240
81580,0rcu_preempt3-21ksoftirqd/022:54:240
81580,0rcu_preempt19-21ksoftirqd/100:26:541
81580,0rcu_preempt0-21swapper/100:22:591
81570,0rcu_preempt3-21ksoftirqd/000:10:130
81570,0rcu_preempt19-21ksoftirqd/123:07:571
81570,0rcu_preempt19-21ksoftirqd/100:37:241
81570,0rcu_preempt0-21swapper/120:59:401
81560,0rcu_preempt19-21ksoftirqd/123:16:151
81560,0rcu_preempt19-21ksoftirqd/119:39:221
81550,0rcu_preempt19-21ksoftirqd/123:54:131
81550,0rcu_preempt0-21swapper/121:50:561
81550,0rcu_preempt0-21swapper/120:38:141
135862550,0sleep010050irq/346-484840020:13:130
135862550,0sleep010050irq/346-484840020:13:130
81540,0rcu_preempt3-21ksoftirqd/021:53:060
81540,0rcu_preempt3-21ksoftirqd/000:20:460
81540,0rcu_preempt19-21ksoftirqd/121:42:131
81540,0rcu_preempt19-21ksoftirqd/100:07:031
81540,0rcu_preempt0-21swapper/121:18:541
10050540,0irq/346-484840030210-1kworker/0:0H00:29:470
81530,0rcu_preempt19-21ksoftirqd/123:02:131
81530,0rcu_preempt14014-21kworker/0:221:30:260
81530,0rcu_preempt0-21swapper/121:10:401
9950520,0irq/345-4848400181ktimersoftd/121:27:011
81520,0rcu_preempt19-21ksoftirqd/120:09:481
81520,0rcu_preempt19-21ksoftirqd/120:09:481
81520,0rcu_preempt0-21swapper/123:49:081
81510,0rcu_preempt19-21ksoftirqd/123:09:241
81510,0rcu_preempt19-21ksoftirqd/121:29:531
10050510,0irq/346-48484007628-1kworker/0:3H23:22:440
10050510,0irq/346-484840054-21kswapd021:59:221
10050510,0irq/346-484840054-21kswapd021:09:390
10050510,0irq/346-484840024083-21taskset22:55:461
10050510,0irq/346-484840024083-21taskset22:55:461
81500,0rcu_preempt54-21kswapd020:27:051
81500,0rcu_preempt3643-1kworker/dying23:21:011
81500,0rcu_preempt3-21ksoftirqd/020:34:520
81500,0rcu_preempt3-21ksoftirqd/020:29:440
81500,0rcu_preempt19-21ksoftirqd/122:34:231
81500,0rcu_preempt19-21ksoftirqd/119:40:001
81500,0rcu_preempt19-21ksoftirqd/100:14:341
225192500,0sleep09950irq/345-484840023:34:540
10050500,0irq/346-48484003677-1kworker/1:1H22:04:331
10050500,0irq/346-484840013871-1kworker/0:1H00:14:470
9950490,0irq/345-48484005526-1kworker/1:0H21:35:011
81490,0rcu_preempt3-21ksoftirqd/021:39:310
81490,0rcu_preempt3-21ksoftirqd/020:39:340
81490,0rcu_preempt3-21ksoftirqd/000:27:570
81490,0rcu_preempt28104-21ping19:44:340
81490,0rcu_preempt0-21swapper/123:41:021
81490,0rcu_preempt0-21swapper/122:33:051
81490,0rcu_preempt0-21swapper/122:33:051
9950480,0irq/345-48484000-21swapper/022:09:020
81480,0rcu_preempt3-21ksoftirqd/020:59:390
81480,0rcu_preempt3-21ksoftirqd/019:09:420
81480,0rcu_preempt19-21ksoftirqd/120:04:371
10050480,0irq/346-484840020168-1kworker/0:3H22:52:280
10050480,0irq/346-484840020168-1kworker/0:3H22:52:280
9950470,0irq/345-48484000-21swapper/023:47:520
81470,0rcu_preempt6257-21diskstats22:34:390
81470,0rcu_preempt3-21ksoftirqd/022:14:380
81460,0rcu_preempt5173-21apt-get23:54:340
81460,0rcu_preempt3-21ksoftirqd/023:39:490
81460,0rcu_preempt3-21ksoftirqd/021:04:430
81460,0rcu_preempt3-21ksoftirqd/020:54:490
81460,0rcu_preempt3-21ksoftirqd/020:49:490
81460,0rcu_preempt3-21ksoftirqd/020:02:000
81460,0rcu_preempt19-21ksoftirqd/120:04:221
81460,0rcu_preempt13894-21df_inode23:24:410
10050460,0irq/346-484840016060-1kworker/1:1H22:49:491
10050460,0irq/346-484840016060-1kworker/1:1H22:49:491
81450,0rcu_preempt23894-21df_inode20:44:350
81450,0rcu_preempt19-21ksoftirqd/120:16:341
81450,0rcu_preempt19-21ksoftirqd/119:44:321
10050450,0irq/346-484840027205-21fschecks_count20:54:401
81440,0rcu_preempt3-21ksoftirqd/019:14:470
81440,0rcu_preempt3-21ksoftirqd/019:14:470
81440,0rcu_preempt19-21ksoftirqd/120:19:491
81440,0rcu_preempt19-21ksoftirqd/119:25:051
81440,0rcu_preempt17131-21runrttasks23:28:591
325332440,0sleep19950irq/345-484840021:47:591
10050440,0irq/346-48484007293-21munin-node0
10050440,0irq/346-48484007293-21munin-node0
81430,0rcu_preempt3-21ksoftirqd/020:14:470
81430,0rcu_preempt19-21ksoftirqd/121:19:591
10050430,0irq/346-484840028104-21ping19:39:220
81420,0rcu_preempt19-21ksoftirqd/123:34:301
81420,0rcu_preempt0-21swapper/119:53:141
24836994213,0cyclictest0-21swapper/019:42:340
10050420,0irq/346-48484000-21swapper/120:41:361
81410,0rcu_preempt54-21kswapd019:14:421
81410,0rcu_preempt54-21kswapd019:14:421
81410,0rcu_preempt19-21ksoftirqd/120:29:501
81410,0rcu_preempt19-21ksoftirqd/119:31:571
81400,0rcu_preempt19-21ksoftirqd/119:19:551
10050400,0irq/346-4848400657-21runrttasks00:30:461
10050400,0irq/346-484840028104-21ping19:29:410
81380,0rcu_preempt19-21ksoftirqd/120:46:141
81380,0rcu_preempt19-21ksoftirqd/119:09:401
81360,0rcu_preempt19-21ksoftirqd/119:04:461
81350,0rcu_preempt19-21ksoftirqd/121:04:491
81350,0rcu_preempt19-21ksoftirqd/120:49:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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