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2026-05-21 - 14:06

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 Thu May 21, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811220,0rcu_preempt19-21ksoftirqd/122:08:151
811020,0rcu_preempt19-21ksoftirqd/121:12:571
811000,0rcu_preempt3-21ksoftirqd/023:08:530
811000,0rcu_preempt19-21ksoftirqd/119:18:191
81930,0rcu_preempt19-21ksoftirqd/120:13:101
81850,0rcu_preempt19-21ksoftirqd/121:48:381
81840,0rcu_preempt19-21ksoftirqd/122:43:171
81810,0rcu_preempt851-21rngd22:03:060
81790,0rcu_preempt19-21ksoftirqd/122:02:561
81760,0rcu_preempt19-21ksoftirqd/120:18:211
81730,0rcu_preempt3-21ksoftirqd/023:18:540
81730,0rcu_preempt19-21ksoftirqd/120:23:281
81710,0rcu_preempt3-21ksoftirqd/023:28:170
81700,0rcu_preempt54-21kswapd022:45:310
81690,0rcu_preempt3-21ksoftirqd/023:35:040
81690,0rcu_preempt3-21ksoftirqd/023:16:490
81670,0rcu_preempt3-21ksoftirqd/022:08:240
81650,0rcu_preempt851-21rngd20:28:190
81650,0rcu_preempt3-21ksoftirqd/022:42:310
81640,0rcu_preempt9676-21ping20:18:150
81640,0rcu_preempt3-21ksoftirqd/000:28:150
81630,0rcu_preempt9676-21ping20:13:180
81620,0rcu_preempt19-21ksoftirqd/122:18:131
81620,0rcu_preempt19-21ksoftirqd/100:02:561
81600,0rcu_preempt19-21ksoftirqd/122:28:231
81600,0rcu_preempt19-21ksoftirqd/122:28:231
81600,0rcu_preempt10568-21kworker/0:119:20:560
81580,0rcu_preempt9676-21ping20:23:270
81580,0rcu_preempt3-21ksoftirqd/021:33:060
81580,0rcu_preempt3-21ksoftirqd/019:13:120
81580,0rcu_preempt29150-21ping19:33:060
81580,0rcu_preempt1548-21kworker/0:122:33:070
81580,0rcu_preempt15269-21dropbear22:28:090
81580,0rcu_preempt15269-21dropbear22:28:090
81570,0rcu_preempt3-21ksoftirqd/022:00:310
81570,0rcu_preempt3-21ksoftirqd/019:48:110
81570,0rcu_preempt3-21ksoftirqd/000:33:100
25876995712,0cyclictest2047-21chrt23:53:080
81560,0rcu_preempt3-21ksoftirqd/019:08:090
81560,0rcu_preempt19-21ksoftirqd/100:08:191
2587699569,0cyclictest0-21swapper/000:23:220
25876995612,0cyclictest0-21swapper/022:19:340
81550,0rcu_preempt3-21ksoftirqd/021:03:150
81540,0rcu_preempt9676-21ping19:58:230
81540,0rcu_preempt6409-21kworker/0:123:07:060
81540,0rcu_preempt3-21ksoftirqd/023:58:260
81540,0rcu_preempt3-21ksoftirqd/023:23:250
81540,0rcu_preempt3-21ksoftirqd/022:27:560
81540,0rcu_preempt3-21ksoftirqd/022:13:130
81540,0rcu_preempt3-21ksoftirqd/020:38:200
81540,0rcu_preempt3-21ksoftirqd/000:22:110
81540,0rcu_preempt19-21ksoftirqd/121:54:041
2587699547,0cyclictest0-21swapper/022:50:300
81530,0rcu_preempt3-21ksoftirqd/023:38:050
81530,0rcu_preempt30409-21apt-get21:38:080
81530,0rcu_preempt19-21ksoftirqd/123:31:211
2587699539,0cyclictest0-21swapper/021:13:030
81520,0rcu_preempt3-21ksoftirqd/021:45:210
81520,0rcu_preempt20064-21kworker/0:000:07:570
81520,0rcu_preempt19-21ksoftirqd/123:52:521
81520,0rcu_preempt19-21ksoftirqd/123:47:251
81520,0rcu_preempt19-21ksoftirqd/123:39:561
2587699529,0cyclictest0-21swapper/000:14:490
25876995215,0cyclictest29493-21apt-get23:48:070
81510,0rcu_preempt3-21ksoftirqd/021:48:130
81510,0rcu_preempt3-21ksoftirqd/021:23:080
81510,0rcu_preempt3-21ksoftirqd/019:43:090
81510,0rcu_preempt3-21ksoftirqd/019:39:300
81510,0rcu_preempt19-21ksoftirqd/122:33:091
81510,0rcu_preempt19-21ksoftirqd/122:06:371
81510,0rcu_preempt19-21ksoftirqd/100:28:141
311552510,0chrt10050irq/346-484840019:23:100
2587699519,0cyclictest0-21swapper/021:19:380
2587699519,0cyclictest0-21swapper/021:19:380
25876995119,0cyclictest7400-21apt-get22:53:060
25876995115,0cyclictest12764-21munin-node0
81500,0rcu_preempt8410-21apt-get19:53:060
81500,0rcu_preempt3-21ksoftirqd/023:43:160
81500,0rcu_preempt3-21ksoftirqd/020:53:080
81500,0rcu_preempt3-21ksoftirqd/020:32:560
81500,0rcu_preempt17136-21munin-node0
2587699508,0cyclictest0-21swapper/021:56:200
81490,0rcu_preempt428-21diskmemload23:09:091
25876994911,0cyclictest0-21swapper/021:08:490
25876994911,0cyclictest0-21swapper/020:48:050
81480,0rcu_preempt3-21ksoftirqd/020:03:220
81480,0rcu_preempt29957-21df_abs20:58:110
81480,0rcu_preempt29363-1kworker/1:2H19:23:131
81480,0rcu_preempt19-21ksoftirqd/123:18:421
81480,0rcu_preempt19-21ksoftirqd/122:40:081
81480,0rcu_preempt19-21ksoftirqd/120:02:061
81470,0rcu_preempt3-21ksoftirqd/020:08:080
81470,0rcu_preempt19-21ksoftirqd/123:23:171
81470,0rcu_preempt19-21ksoftirqd/119:43:181
25877994711,0cyclictest4461-21ssh22:49:231
2587799471,0cyclictest428-21diskmemload00:13:061
2587699479,0cyclictest21228-21latency21:28:230
81460,0rcu_preempt29150-21ping19:28:060
81460,0rcu_preempt19-21ksoftirqd/123:54:531
81460,0rcu_preempt19-21ksoftirqd/122:53:231
81460,0rcu_preempt19-21ksoftirqd/121:27:221
81460,0rcu_preempt19-21ksoftirqd/120:51:061
2587799461,0cyclictest428-21diskmemload21:45:561
2587799461,0cyclictest428-21diskmemload00:22:031
2587799461,0cyclictest28116-21apt-get20:53:071
2587799461,0cyclictest27321-21ssh23:13:101
81450,0rcu_preempt19-21ksoftirqd/121:04:461
4350450,0irq/32-4330000024573-21sh19:03:070
2587799452,0cyclictest7231-1kworker/1:1H22:23:211
2587799452,0cyclictest1007-21dropbear20:03:121
25877994513,0cyclictest428-21diskmemload00:33:491
25877994511,0cyclictest28885-1kworker/1:3H00:27:561
2587799451,0cyclictest6768-21apt-get19:48:051
2587799451,0cyclictest428-21diskmemload23:05:331
2587799451,0cyclictest428-21diskmemload22:59:551
2587799451,0cyclictest428-21diskmemload22:15:181
2587799451,0cyclictest428-21diskmemload21:09:411
81440,0rcu_preempt19-21ksoftirqd/123:33:161
81440,0rcu_preempt19-21ksoftirqd/120:08:141
2587799449,0cyclictest10364-1kworker/1:0H21:18:031
2587799449,0cyclictest10364-1kworker/1:0H21:18:031
2587799442,0cyclictest1067-21lighttpd19:28:141
2587799441,0cyclictest428-21diskmemload21:42:131
2587799441,0cyclictest428-21diskmemload21:34:301
2587799441,0cyclictest428-21diskmemload21:28:001
2587799441,0cyclictest428-21diskmemload00:05:411
2587799441,0cyclictest24837-21apt-get20:43:071
2587799441,0cyclictest23201-21apt-get20:38:071
25876994411,0cyclictest25083-21chrt20:43:120
2587799432,0cyclictest28240-21memory19:13:171
25877994311,0cyclictest2328-21irqstats19:33:181
2587799412,0cyclictest26185-21munin-node1
25877994112,0cyclictest31025-21taskset21:00:311
25877994112,0cyclictest20115-21df20:28:111
2587799402,0cyclictest8410-21apt-get19:53:071
25877994012,0cyclictest21603-21wget20:33:081
81390,0rcu_preempt19-21ksoftirqd/119:05:051
2587799391,0cyclictest1339-21snmpd19:38:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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