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2026-04-23 - 04:53

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 Thu Apr 23, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811150,0rcu_preempt19-21ksoftirqd/119:07:441
81820,0rcu_preempt19-21ksoftirqd/123:03:491
81610,0rcu_preempt19-21ksoftirqd/123:38:371
9950580,0irq/345-48484000-21swapper/123:51:281
81570,0rcu_preempt3-21ksoftirqd/019:03:360
81570,0rcu_preempt19-21ksoftirqd/119:58:371
81570,0rcu_preempt19-21ksoftirqd/119:58:371
10050560,0irq/346-48484008450-1kworker/0:0H21:12:300
10050560,0irq/346-48484005250-1kworker/0:0H21:45:170
9950550,0irq/345-484840081rcu_preempt23:47:551
81550,0rcu_preempt19-21ksoftirqd/121:57:091
81540,0rcu_preempt19-21ksoftirqd/100:03:411
81530,0rcu_preempt19-21ksoftirqd/121:47:211
10050530,0irq/346-484840031741-1kworker/0:0H23:50:340
10050530,0irq/346-484840026352-1kworker/0:1H23:40:150
81510,0rcu_preempt19-21ksoftirqd/122:13:541
81510,0rcu_preempt12790-1kworker/0:0H22:35:550
111510,0rcuc/01633-1kworker/0:4H23:34:290
10050510,0irq/346-484840030886-21ssh22:06:220
10050510,0irq/346-484840010587-1kworker/0:1H21:55:100
10050500,0irq/346-48484007814-1kworker/0:3H22:29:310
10050500,0irq/346-484840032375-1kworker/0:2H21:49:160
10050500,0irq/346-484840032375-1kworker/0:2H21:49:160
10050500,0irq/346-48484001981-21ping19:23:500
10050500,0irq/346-484840013672-1kworker/0:2H00:04:530
10050500,0irq/346-48484000-21swapper/021:25:340
81490,0rcu_preempt3-21ksoftirqd/022:41:410
81490,0rcu_preempt3-21ksoftirqd/020:12:310
81490,0rcu_preempt19-21ksoftirqd/122:08:231
81490,0rcu_preempt19-21ksoftirqd/121:48:391
81490,0rcu_preempt19-21ksoftirqd/121:48:391
81490,0rcu_preempt19-21ksoftirqd/120:18:421
81490,0rcu_preempt19-21ksoftirqd/120:08:231
81490,0rcu_preempt19-21ksoftirqd/119:48:501
81490,0rcu_preempt19-21ksoftirqd/119:38:541
10050490,0irq/346-48484003227-21ssh00:23:010
10050490,0irq/346-484840025376-1kworker/0:1H21:32:220
81480,0rcu_preempt4570-21apt-get23:18:331
81480,0rcu_preempt3-21ksoftirqd/020:02:050
81480,0rcu_preempt3-21ksoftirqd/020:02:050
81480,0rcu_preempt19-21ksoftirqd/121:27:251
4250480,0irq/29-omap-dma11951-21ssh23:58:421
111480,0rcuc/031741-1kworker/0:0H23:55:100
111480,0rcuc/031741-1kworker/0:0H23:55:100
81470,0rcu_preempt54-21kswapd023:01:501
81470,0rcu_preempt3-21ksoftirqd/020:18:470
81470,0rcu_preempt3-21ksoftirqd/019:48:280
81470,0rcu_preempt1981-21ping19:18:341
81470,0rcu_preempt19-21ksoftirqd/120:23:591
81470,0rcu_preempt19-21ksoftirqd/120:13:481
10050470,0irq/346-48484006079-21ssh22:47:030
10050470,0irq/346-484840015041-1kworker/0:3H22:55:550
9950460,0irq/345-484840018115-21processes22:58:510
81460,0rcu_preempt3-21ksoftirqd/022:22:460
81460,0rcu_preempt19-21ksoftirqd/119:28:261
10050460,0irq/346-48484007060-21ssh23:20:330
10050460,0irq/346-484840017351-21ssh21:19:160
10050460,0irq/346-484840015791-1kworker/0:2H00:35:190
10050460,0irq/346-48484000-21swapper/022:52:380
10050460,0irq/346-48484000-21swapper/022:23:410
9950450,0irq/345-484840010663-21munin-node0
81450,0rcu_preempt54-21kswapd021:37:420
81450,0rcu_preempt3-21ksoftirqd/023:13:380
81450,0rcu_preempt1981-21ping19:23:461
81450,0rcu_preempt19-21ksoftirqd/123:13:391
81450,0rcu_preempt19-21ksoftirqd/123:08:461
81450,0rcu_preempt19-21ksoftirqd/122:56:221
81450,0rcu_preempt19-21ksoftirqd/121:38:431
81450,0rcu_preempt19-21ksoftirqd/121:28:441
81450,0rcu_preempt19-21ksoftirqd/121:14:281
81450,0rcu_preempt19-21ksoftirqd/121:08:501
81450,0rcu_preempt19-21ksoftirqd/120:58:341
81450,0rcu_preempt19-21ksoftirqd/120:08:441
81450,0rcu_preempt19-21ksoftirqd/100:13:371
81450,0rcu_preempt19-21ksoftirqd/100:11:321
10050450,0irq/346-48484008699-21munin-node0
10050450,0irq/346-484840024861-21ssh23:05:480
10050450,0irq/346-484840024421-21ssh21:59:220
10050450,0irq/346-484840024421-21ssh21:59:220
10050450,0irq/346-484840021655-21munin-run20:18:230
81440,0rcu_preempt5671-21diskmemload22:04:511
81440,0rcu_preempt3-21ksoftirqd/023:43:550
81440,0rcu_preempt19305-21ssh23:33:311
81440,0rcu_preempt19-21ksoftirqd/122:43:501
81440,0rcu_preempt19-21ksoftirqd/122:26:581
81440,0rcu_preempt19-21ksoftirqd/120:43:381
81440,0rcu_preempt19-21ksoftirqd/119:45:001
81440,0rcu_preempt19-21ksoftirqd/119:33:481
81440,0rcu_preempt19-21ksoftirqd/119:18:241
81440,0rcu_preempt19-21ksoftirqd/100:23:231
81440,0rcu_preempt19-21ksoftirqd/100:18:411
10050440,0irq/346-48484005078-21rm22:13:250
10050440,0irq/346-484840016495-21rm23:29:580
10050440,0irq/346-48484001286-21cron00:10:220
9950430,0irq/345-48484005671-21diskmemload00:13:390
9950430,0irq/345-484840030353-21munin-node0
9950430,0irq/345-48484001981-21ping19:18:230
9950430,0irq/345-48484000-21swapper/019:43:220
9950430,0irq/345-48484000-21swapper/019:18:560
81430,0rcu_preempt7680-21ssh21:43:190
81430,0rcu_preempt30933-21php-cgi21:33:421
81430,0rcu_preempt25681-21memory22:33:471
81430,0rcu_preempt19-21ksoftirqd/123:23:241
81430,0rcu_preempt19-21ksoftirqd/122:48:381
81430,0rcu_preempt19-21ksoftirqd/122:38:521
81430,0rcu_preempt19-21ksoftirqd/122:30:131
81430,0rcu_preempt19-21ksoftirqd/122:22:161
81430,0rcu_preempt19-21ksoftirqd/121:58:391
81430,0rcu_preempt19-21ksoftirqd/121:58:391
81430,0rcu_preempt19-21ksoftirqd/119:55:261
81430,0rcu_preempt19-21ksoftirqd/100:36:551
81430,0rcu_preempt15680-21ssh23:28:541
13250430,0irq/301-480200023631-21sh20:23:360
10050430,0irq/346-48484009882-1kworker/0:1H19:53:500
10050430,0irq/346-484840032676-21apt-get22:08:330
10050430,0irq/346-484840029085-1kworker/0:0H23:13:010
10050430,0irq/346-484840028421-1kworker/0:1H20:38:390
10050430,0irq/346-48484002105-1kworker/0:3H21:03:460
10050430,0irq/346-484840014952-21rm21:17:370
81420,0rcu_preempt19-21ksoftirqd/123:57:531
81420,0rcu_preempt19-21ksoftirqd/123:57:531
81420,0rcu_preempt10168-21meminfo23:23:450
3110499421,0cyclictest1981-21ping19:33:420
10050420,0irq/346-48484006634-21ssh00:26:000
81410,0rcu_preempt3-21ksoftirqd/020:05:300
81410,0rcu_preempt3-21ksoftirqd/000:01:200
10050410,0irq/346-4848400690-1kworker/0:2H20:53:230
10050410,0irq/346-484840023019-1kworker/0:2H20:28:390
10050410,0irq/346-48484001535-21ntpq20:53:480
81400,0rcu_preempt19-21ksoftirqd/121:18:321
10050400,0irq/346-484840032633-21runrttasks19:12:220
10050400,0irq/346-48484002105-1kworker/0:3H20:58:430
81390,0rcu_preempt19-21ksoftirqd/100:28:391
81380,0rcu_preempt19-21ksoftirqd/120:53:231
81380,0rcu_preempt19-21ksoftirqd/119:08:341
81370,0rcu_preempt19-21ksoftirqd/120:42:151
81370,0rcu_preempt0-21swapper/120:33:451
9950360,0irq/345-48484000-21swapper/020:33:330
81360,0rcu_preempt32382-21ps20:48:461
81360,0rcu_preempt19-21ksoftirqd/121:06:251
81360,0rcu_preempt19-21ksoftirqd/120:30:261
10050360,0irq/346-48484006888-21munin-plugin-st19:33:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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