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2025-11-29 - 22:05

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 Nov 29, 2025 12:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
160582990,0sleep010050irq/346-484840008:13:290
81900,0rcu_preempt3-21ksoftirqd/010:49:000
81880,0rcu_preempt3-21ksoftirqd/011:59:410
81860,0rcu_preempt3-21ksoftirqd/008:34:460
81810,0rcu_preempt32287-21kworker/u4:112:35:220
81810,0rcu_preempt3-21ksoftirqd/010:04:330
81760,0rcu_preempt3-21ksoftirqd/012:15:020
81760,0rcu_preempt3-21ksoftirqd/010:54:430
81760,0rcu_preempt3-21ksoftirqd/009:09:570
81750,0rcu_preempt3-21ksoftirqd/011:44:570
81750,0rcu_preempt3-21ksoftirqd/008:05:190
81740,0rcu_preempt3-21ksoftirqd/010:09:470
81730,0rcu_preempt921-21nfsv4.0-svc07:54:270
81720,0rcu_preempt3-21ksoftirqd/011:39:330
81710,0rcu_preempt3-21ksoftirqd/011:31:440
81700,0rcu_preempt3-21ksoftirqd/011:54:540
81700,0rcu_preempt3-21ksoftirqd/010:01:510
10050700,0irq/346-48484002007-1kworker/0:3H11:00:060
81690,0rcu_preempt3-21ksoftirqd/008:49:390
81680,0rcu_preempt3-21ksoftirqd/008:39:290
81660,0rcu_preempt3-21ksoftirqd/012:31:070
227892660,0sleep09950irq/345-484840009:37:340
65992650,0chrt9950irq/345-484840007:44:411
81640,0rcu_preempt2788-1kworker/0:1H07:39:290
10050640,0irq/346-4848400751-21rngd10:44:341
81620,0rcu_preempt3-21ksoftirqd/011:16:420
81620,0rcu_preempt3-21ksoftirqd/009:16:210
81610,0rcu_preempt3-21ksoftirqd/012:09:590
81600,0rcu_preempt3-21ksoftirqd/011:24:280
177742600,0sleep010050irq/346-484840008:19:240
81590,0rcu_preempt3-21ksoftirqd/012:20:420
81590,0rcu_preempt3-21ksoftirqd/011:49:520
81590,0rcu_preempt3-21ksoftirqd/008:32:380
81590,0rcu_preempt19-21ksoftirqd/109:20:511
81580,0rcu_preempt3-21ksoftirqd/012:24:340
81580,0rcu_preempt3-21ksoftirqd/012:24:340
81580,0rcu_preempt3-21ksoftirqd/011:06:000
81580,0rcu_preempt19-21ksoftirqd/111:25:591
81580,0rcu_preempt0-21swapper/109:42:461
81570,0rcu_preempt54-21kswapd011:13:480
81570,0rcu_preempt3-21ksoftirqd/010:23:380
4350570,0irq/32-4330000030965-21dropbear07:19:481
81560,0rcu_preempt3-21ksoftirqd/009:50:570
81560,0rcu_preempt19-21ksoftirqd/110:54:091
81560,0rcu_preempt0-21swapper/110:15:521
81550,0rcu_preempt54-21kswapd007:15:270
81550,0rcu_preempt3-21ksoftirqd/010:24:340
81550,0rcu_preempt19-21ksoftirqd/109:51:391
81550,0rcu_preempt0-21swapper/111:29:591
10050550,0irq/346-484840032620-1kworker/1:2H12:04:331
10050540,0irq/346-484840054-21kswapd009:59:331
10050540,0irq/346-484840026813-21munin-node1
10050540,0irq/346-484840024762-21fschecks_time08:39:481
81530,0rcu_preempt11085-21ping08:19:381
81530,0rcu_preempt11085-21ping08:19:381
81520,0rcu_preempt0-21swapper/112:28:531
81520,0rcu_preempt0-21swapper/112:28:531
81520,0rcu_preempt0-21swapper/111:18:321
81520,0rcu_preempt0-21swapper/012:05:150
10050520,0irq/346-48484002497-21apt-get09:54:410
10050520,0irq/346-48484000-21swapper/112:11:531
81510,0rcu_preempt27316-21cyclictest10:32:301
81510,0rcu_preempt19-21ksoftirqd/110:58:101
81510,0rcu_preempt19-21ksoftirqd/108:49:401
81510,0rcu_preempt19-21ksoftirqd/108:14:491
81510,0rcu_preempt0-21swapper/112:39:211
116852510,0chrt9950irq/345-484840011:34:300
10050510,0irq/346-484840030341-1kworker/0:0H10:34:510
10050510,0irq/346-484840030341-1kworker/0:0H10:34:510
10050510,0irq/346-48484002007-1kworker/0:3H10:49:420
81500,0rcu_preempt9607-21apt-get09:19:390
81500,0rcu_preempt751-21rngd09:05:560
81500,0rcu_preempt29404-21meminfo10:29:520
81500,0rcu_preempt19-21ksoftirqd/107:40:021
81500,0rcu_preempt0-21swapper/110:40:441
81500,0rcu_preempt0-21swapper/110:13:231
192542500,0sleep010050irq/346-484840008:22:320
192542500,0sleep010050irq/346-484840008:22:320
10050500,0irq/346-484840019611-1kworker/1:0H10:19:291
10050500,0irq/346-48484000-21swapper/009:47:040
81490,0rcu_preempt3-21ksoftirqd/007:09:470
81490,0rcu_preempt19-21ksoftirqd/108:05:121
81490,0rcu_preempt0-21swapper/112:32:041
81490,0rcu_preempt0-21swapper/109:11:151
128252490,0sleep010050irq/346-484840008:03:460
10050490,0irq/346-484840010204-21cpu10:04:431
9950480,0irq/345-4848400181ktimersoftd/108:56:311
9950480,0irq/345-48484000-21swapper/107:39:281
81470,0rcu_preempt3-21ksoftirqd/008:59:520
81470,0rcu_preempt19-21ksoftirqd/111:39:421
81470,0rcu_preempt19-21ksoftirqd/111:04:491
81470,0rcu_preempt19-21ksoftirqd/109:38:561
81470,0rcu_preempt19-21ksoftirqd/108:24:461
81470,0rcu_preempt0-21swapper/111:00:561
10050470,0irq/346-484840054-21kswapd012:01:591
10050470,0irq/346-484840054-21kswapd010:39:310
10050470,0irq/346-484840054-21kswapd009:31:090
10050470,0irq/346-484840029947-1kworker/1:0H08:59:311
10050470,0irq/346-484840028463-1kworker/0:2H07:24:280
10050470,0irq/346-484840024283-21ssh09:39:460
9950460,0irq/345-48484000-21swapper/011:25:510
81460,0rcu_preempt54-21kswapd008:09:461
81460,0rcu_preempt3-21ksoftirqd/007:54:480
81460,0rcu_preempt19-21ksoftirqd/109:25:001
81460,0rcu_preempt19-21ksoftirqd/108:02:151
9950450,0irq/345-484840017637-1kworker/1:3H11:46:431
81450,0rcu_preempt3-21ksoftirqd/010:14:450
81450,0rcu_preempt19-21ksoftirqd/107:49:471
81450,0rcu_preempt1338-21kworker/1:009:08:451
10050450,0irq/346-484840025944-1kworker/1:3H11:09:591
10050450,0irq/346-484840019153-1kworker/0:3H08:25:390
10050450,0irq/346-48484001782-21diskmemload11:20:521
10050450,0irq/346-484840017447-21taskset12:23:201
81440,0rcu_preempt28125-21kworker/1:011:38:531
81440,0rcu_preempt19-21ksoftirqd/111:52:001
81440,0rcu_preempt19-21ksoftirqd/107:24:541
81440,0rcu_preempt16756-21apt-get09:29:391
10050440,0irq/346-48484004052-1kworker/1:2H09:14:491
10050440,0irq/346-484840028976-1kworker/0:3H08:54:460
81430,0rcu_preempt26360-21diskstats08:44:450
81430,0rcu_preempt19-21ksoftirqd/110:38:391
81430,0rcu_preempt19-21ksoftirqd/110:38:391
81430,0rcu_preempt19-21ksoftirqd/109:54:401
10050430,0irq/346-48484009486-1kworker/0:3H09:24:560
10050430,0irq/346-48484007692-1kworker/1:2H07:55:271
10050430,0irq/346-484840019611-1kworker/1:0H10:24:371
9950420,0irq/345-484840030593-21ping07:45:000
9950420,0irq/345-484840030593-21ping07:39:330
1699420,0migration/112255-21runrttasks12:16:071
81410,0rcu_preempt3-21ksoftirqd/007:04:470
81410,0rcu_preempt19-21ksoftirqd/109:45:051
81410,0rcu_preempt19-21ksoftirqd/107:34:281
81410,0rcu_preempt19-21ksoftirqd/107:34:281
81410,0rcu_preempt19-21ksoftirqd/107:04:451
81410,0rcu_preempt1338-21kworker/1:008:38:061
81400,0rcu_preempt19-21ksoftirqd/108:48:041
81400,0rcu_preempt19-21ksoftirqd/107:15:291
10050400,0irq/346-484840028463-1kworker/0:2H07:30:040
10050400,0irq/346-484840028463-1kworker/0:2H07:30:040
81390,0rcu_preempt19-21ksoftirqd/107:13:021
81380,0rcu_preempt3-21ksoftirqd/007:24:590
81380,0rcu_preempt19-21ksoftirqd/108:30:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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