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2025-12-08 - 10:08

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 highest latencies:
System rackaslot5s.osadl.org (updated Mon Dec 08, 2025 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
81930,0rcu_preempt21219-1kworker/0:2H22:21:500
81850,0rcu_preempt23155-1kworker/0:2H19:34:470
81850,0rcu_preempt23155-1kworker/0:2H19:34:470
125322760,0sleep010050irq/346-484840020:24:450
99932730,0sleep09950irq/345-484840023:25:380
68802650,0sleep010050irq/346-484840020:08:340
81630,0rcu_preempt3-21ksoftirqd/000:04:480
81610,0rcu_preempt19-21ksoftirqd/123:39:531
90822590,0sleep09950irq/345-484840020:14:430
81590,0rcu_preempt19-21ksoftirqd/122:34:091
10050590,0irq/346-484840054-21kswapd022:39:310
81560,0rcu_preempt19-21ksoftirqd/121:34:251
84682550,0sleep010050irq/346-484840020:13:050
81550,0rcu_preempt19-21ksoftirqd/122:34:411
10050540,0irq/346-484840028589-1kworker/0:3H21:21:410
10050540,0irq/346-484840021963-1kworker/0:2H23:02:250
9950530,0irq/345-484840025366-1kworker/0:0H22:26:170
81530,0rcu_preempt19-21ksoftirqd/122:54:511
81530,0rcu_preempt19-21ksoftirqd/121:15:511
80222530,0sleep09950irq/345-484840021:24:530
36402530,0sleep010050irq/346-484840019:59:040
261222530,0sleep19950irq/345-484840021:47:451
139892530,0chrt9950irq/345-484840022:51:190
109852530,0sleep010050irq/346-484840020:19:480
10050530,0irq/346-484840026372-1kworker/0:0H21:10:180
81520,0rcu_preempt19-21ksoftirqd/122:59:491
81520,0rcu_preempt19-21ksoftirqd/100:34:161
81520,0rcu_preempt19-21ksoftirqd/100:06:511
10050520,0irq/346-484840026946-1kworker/0:3H23:47:060
10050520,0irq/346-484840021229-1kworker/0:3H00:25:300
10050520,0irq/346-484840012948-1kworker/0:1H22:13:120
9950510,0irq/345-484840017058-1kworker/1:2H22:18:191
81510,0rcu_preempt3-21ksoftirqd/000:36:180
81510,0rcu_preempt19-21ksoftirqd/119:35:341
81510,0rcu_preempt19-21ksoftirqd/119:35:341
195142510,0sleep09950irq/345-484840022:58:470
143392510,0sleep09950irq/345-484840021:33:360
103452510,0sleep09950irq/345-484840022:08:220
103452510,0sleep09950irq/345-484840022:08:220
10050510,0irq/346-484840019810-1kworker/0:1H21:17:570
10050510,0irq/346-484840019-21ksoftirqd/100:34:551
10050510,0irq/346-484840017784-1kworker/0:2H00:17:400
10050510,0irq/346-484840013769-1kworker/0:0H23:12:010
81500,0rcu_preempt3-21ksoftirqd/022:34:310
81500,0rcu_preempt19-21ksoftirqd/123:54:491
10050500,0irq/346-484840021220-1kworker/0:3H22:32:320
10050500,0irq/346-484840018569-1kworker/0:2H23:41:280
9950490,0irq/345-48484004789-1kworker/0:4H22:02:150
81490,0rcu_preempt19-21ksoftirqd/120:03:301
81490,0rcu_preempt19-21ksoftirqd/119:39:431
54912490,0sleep09950irq/345-484840023:19:590
10050490,0irq/346-484840016809-21sendmail-msp20:39:200
10050490,0irq/346-484840010514-1kworker/0:1H00:09:490
9950480,0irq/345-484840020149-21munin-node0
81480,0rcu_preempt19-21ksoftirqd/121:43:011
81480,0rcu_preempt19-21ksoftirqd/119:25:151
81480,0rcu_preempt0-21swapper/123:14:011
81480,0rcu_preempt0-21swapper/120:06:091
10050480,0irq/346-48484007722-21ssh22:44:230
10050480,0irq/346-484840023155-1kworker/0:2H19:29:520
9950470,0irq/345-4848400181ktimersoftd/100:19:231
81470,0rcu_preempt3-21ksoftirqd/019:14:410
81470,0rcu_preempt19-21ksoftirqd/123:32:451
81470,0rcu_preempt19-21ksoftirqd/123:24:331
81470,0rcu_preempt19-21ksoftirqd/120:20:381
81470,0rcu_preempt19-21ksoftirqd/120:18:381
81470,0rcu_preempt19-21ksoftirqd/119:31:111
68002470,0sleep19950irq/345-484840000:01:021
10050470,0irq/346-484840026946-1kworker/0:3H23:50:230
9950460,0irq/345-484840022998-21ping19:39:370
81460,0rcu_preempt3-21ksoftirqd/021:54:120
81460,0rcu_preempt3-21ksoftirqd/021:54:120
81460,0rcu_preempt3-21ksoftirqd/021:04:370
81460,0rcu_preempt19-21ksoftirqd/120:24:411
81460,0rcu_preempt19-21ksoftirqd/119:44:541
81460,0rcu_preempt19-21ksoftirqd/119:44:541
81460,0rcu_preempt19-21ksoftirqd/119:19:411
81460,0rcu_preempt17059-1kworker/0:0H22:15:500
53062460,0sleep010050irq/346-484840020:04:140
10050460,0irq/346-484840026643-21munin-node0
10050460,0irq/346-484840020873-1kworker/0:2H21:42:160
10050460,0irq/346-484840013134-21meminfo23:29:460
10050460,0irq/346-48484000-21swapper/023:34:390
10050460,0irq/346-48484000-21swapper/000:02:230
9950450,0irq/345-48484000-21swapper/021:58:580
9950450,0irq/345-48484000-21swapper/021:58:580
81450,0rcu_preempt3-21ksoftirqd/019:09:490
81450,0rcu_preempt22989-1kworker/0:1H19:19:510
81450,0rcu_preempt19-21ksoftirqd/121:30:051
81450,0rcu_preempt19-21ksoftirqd/120:09:521
81450,0rcu_preempt19-21ksoftirqd/100:24:451
81450,0rcu_preempt0-21swapper/123:34:511
81440,0rcu_preempt3-21ksoftirqd/021:38:440
81440,0rcu_preempt19-21ksoftirqd/122:19:381
81440,0rcu_preempt19-21ksoftirqd/120:44:401
81440,0rcu_preempt19-21ksoftirqd/100:18:051
10050440,0irq/346-484840031096-1kworker/0:0H23:54:400
10050440,0irq/346-484840024291-21munin-node0
10050440,0irq/346-484840024291-21munin-node0
10050440,0irq/346-48484001963-1kworker/0:2H23:16:020
10050440,0irq/346-484840017788-1kworker/0:1H19:04:340
81430,0rcu_preempt3-21ksoftirqd/020:29:340
81430,0rcu_preempt20873-1kworker/0:2H21:44:320
81430,0rcu_preempt19-21ksoftirqd/123:14:311
81430,0rcu_preempt19-21ksoftirqd/122:40:181
81430,0rcu_preempt19-21ksoftirqd/122:04:331
81430,0rcu_preempt19-21ksoftirqd/122:04:331
81430,0rcu_preempt19-21ksoftirqd/121:50:151
81430,0rcu_preempt19-21ksoftirqd/121:50:151
297112430,0sleep19950irq/345-484840021:12:351
10050430,0irq/346-484840018172-1kworker/0:0H20:44:390
81420,0rcu_preempt19-21ksoftirqd/123:44:431
81420,0rcu_preempt19-21ksoftirqd/122:09:251
81420,0rcu_preempt19-21ksoftirqd/121:56:571
81420,0rcu_preempt19-21ksoftirqd/121:56:571
81420,0rcu_preempt19-21ksoftirqd/121:19:321
251092420,0sleep19950irq/345-484840022:25:271
10050420,0irq/346-484840024482-21sed20:59:510
9950410,0irq/345-484840013768-1kworker/1:0H22:52:431
9950410,0irq/345-48484000-21swapper/019:46:280
9950410,0irq/345-48484000-21swapper/019:46:280
81410,0rcu_preempt24537-21df_inode23:04:431
81410,0rcu_preempt24537-21df_inode23:04:431
81410,0rcu_preempt19-21ksoftirqd/122:44:321
81410,0rcu_preempt19-21ksoftirqd/121:29:041
81410,0rcu_preempt19-21ksoftirqd/119:18:361
81410,0rcu_preempt19-21ksoftirqd/100:13:531
10050410,0irq/346-484840032535-1kworker/0:3H19:49:530
10050410,0irq/346-484840014880-1kworker/0:3H20:39:450
81400,0rcu_preempt3-21ksoftirqd/019:24:340
81400,0rcu_preempt21186-21sshd19:12:341
81400,0rcu_preempt19-21ksoftirqd/123:49:371
81400,0rcu_preempt19-21ksoftirqd/123:19:221
81400,0rcu_preempt19-21ksoftirqd/121:59:501
81400,0rcu_preempt19-21ksoftirqd/121:07:381
81400,0rcu_preempt19-21ksoftirqd/120:49:341
81400,0rcu_preempt19-21ksoftirqd/120:34:391
81400,0rcu_preempt19-21ksoftirqd/120:31:341
81400,0rcu_preempt19-21ksoftirqd/119:49:431
10050400,0irq/346-484840021448-1kworker/0:2H20:54:430
10050400,0irq/346-484840019810-1kworker/0:1H20:49:360
81390,0rcu_preempt19-21ksoftirqd/120:39:441
81390,0rcu_preempt19-21ksoftirqd/119:57:211
81380,0rcu_preempt19-21ksoftirqd/120:57:561
81370,0rcu_preempt24190-21ntp_states20:59:461
81370,0rcu_preempt19-21ksoftirqd/119:04:361
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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