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2026-03-12 - 04:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #3, 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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  Eltec
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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 376 highest latencies:
System rack3slot5s.osadl.org (updated Thu Mar 12, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3211721570chrt121650irq/29-eth0_g0_21:15:510
229821300sleep0121750irq/30-eth0_g0_21:27:370
121770ksoftirqd/1121750irq/30-eth0_g0_00:37:010
36282630sleep1121750irq/30-eth0_g0_19:20:091
22992590sleep1121750irq/30-eth0_g0_23:40:101
221382570sleep1121750irq/30-eth0_g0_20:35:141
311322540sleep1121750irq/30-eth0_g0_21:13:391
121540ksoftirqd/1121750irq/30-eth0_g0_21:21:201
256982530sleep1121750irq/30-eth0_g0_23:04:331
242972530sleep1121750irq/30-eth0_g0_22:57:271
121750520irq/30-eth0_g0_121ksoftirqd/123:12:031
121490ksoftirqd/1121750irq/30-eth0_g0_21:29:191
98442480sleep1121750irq/30-eth0_g0_21:59:551
121750470irq/30-eth0_g0_121ksoftirqd/119:05:101
121650460irq/29-eth0_g0_31ksoftirqd/022:36:590
121650460irq/29-eth0_g0_24043-21unixbench_singl22:55:150
121650460irq/29-eth0_g0_2029-21runrttasks23:39:040
121460ksoftirqd/1121750irq/30-eth0_g0_23:49:301
121750450irq/30-eth0_g0_470-21kworker/1:123:52:221
121650450irq/29-eth0_g0_31ksoftirqd/023:14:550
121450ksoftirqd/1121650irq/29-eth0_g0_21:55:290
121450ksoftirqd/1121650irq/29-eth0_g0_19:28:271
326872440sleep1121650irq/29-eth0_g0_23:30:261
121750440irq/30-eth0_g0_470-21kworker/1:123:27:361
121750440irq/30-eth0_g0_31333-21/usr/sbin/munin21:15:171
121650440irq/29-eth0_g0_32225-21/usr/sbin/munin19:05:090
121650440irq/29-eth0_g0_31ksoftirqd/020:55:040
121440ksoftirqd/1121650irq/29-eth0_g0_19:43:091
121750430irq/30-eth0_g0_6421-21vmstat19:30:160
121750430irq/30-eth0_g0_121ksoftirqd/121:39:551
121650430irq/29-eth0_g0_31ksoftirqd/019:40:140
121430ksoftirqd/1121650irq/29-eth0_g0_19:45:381
121430ksoftirqd/1121650irq/29-eth0_g0_19:45:381
121750420irq/30-eth0_g0_470-21kworker/1:122:47:381
121750420irq/30-eth0_g0_470-21kworker/1:122:47:381
121750420irq/30-eth0_g0_470-21kworker/1:121:48:271
121750420irq/30-eth0_g0_470-21kworker/1:121:33:171
121750420irq/30-eth0_g0_470-21kworker/1:100:16:021
121650420irq/29-eth0_g0_31ksoftirqd/021:37:090
121650420irq/29-eth0_g0_31ksoftirqd/000:20:190
121650420irq/29-eth0_g0_13-21kworker/0:123:22:210
121650420irq/29-eth0_g0_13-21kworker/0:122:30:230
121650420irq/29-eth0_g0_13-21kworker/0:122:05:160
121420ksoftirqd/1121750irq/30-eth0_g0_22:35:091
121750410irq/30-eth0_g0_31ksoftirqd/000:25:120
121650410irq/29-eth0_g0_13-21kworker/0:123:01:130
121650410irq/29-eth0_g0_13-21kworker/0:122:40:390
121650410irq/29-eth0_g0_13-21kworker/0:121:46:480
121650410irq/29-eth0_g0_13-21kworker/0:121:30:120
121410ksoftirqd/1121750irq/30-eth0_g0_00:20:061
121410ksoftirqd/1121650irq/29-eth0_g0_21:40:171
121750400irq/30-eth0_g0_470-21kworker/1:123:09:151
121750400irq/30-eth0_g0_470-21kworker/1:100:02:381
121750400irq/30-eth0_g0_470-21kworker/1:100:02:381
121750400irq/30-eth0_g0_121ksoftirqd/123:58:031
121750400irq/30-eth0_g0_121ksoftirqd/100:10:411
121650400irq/29-eth0_g0_31ksoftirqd/022:46:060
121650400irq/29-eth0_g0_31ksoftirqd/022:46:060
121650400irq/29-eth0_g0_13-21kworker/0:122:18:300
121650400irq/29-eth0_g0_13-21kworker/0:100:19:140
121400ksoftirqd/1121750irq/30-eth0_g0_23:33:370
121400ksoftirqd/1121650irq/29-eth0_g0_23:21:231
121400ksoftirqd/1121650irq/29-eth0_g0_22:53:211
121400ksoftirqd/1121650irq/29-eth0_g0_22:53:211
67899391cyclictest1452-21/usr/sbin/munin19:10:161
67899391cyclictest11038-21wc19:50:151
121750390irq/30-eth0_g0_470-21kworker/1:123:36:431
121750390irq/30-eth0_g0_470-21kworker/1:123:16:191
121750390irq/30-eth0_g0_470-21kworker/1:100:36:291
121750390irq/30-eth0_g0_121ksoftirqd/122:06:511
121650390irq/29-eth0_g0_31305-21timerandwakeup23:25:150
121650390irq/29-eth0_g0_31ksoftirqd/000:00:150
121650390irq/29-eth0_g0_31ksoftirqd/000:00:150
121650390irq/29-eth0_g0_24426-21/usr/sbin/munin20:45:120
121650390irq/29-eth0_g0_13-21kworker/0:123:55:320
121650390irq/29-eth0_g0_13-21kworker/0:123:40:000
121650390irq/29-eth0_g0_13-21kworker/0:123:06:520
121650390irq/29-eth0_g0_13-21kworker/0:122:22:480
121650390irq/29-eth0_g0_11864-21df19:55:060
121390ksoftirqd/1121750irq/30-eth0_g0_23:53:390
121390ksoftirqd/1121750irq/30-eth0_g0_22:29:430
121390ksoftirqd/1121750irq/30-eth0_g0_22:11:340
121390ksoftirqd/1121750irq/30-eth0_g0_20:08:520
121390ksoftirqd/1121750irq/30-eth0_g0_19:38:310
121390ksoftirqd/1121750irq/30-eth0_g0_00:32:130
121390ksoftirqd/1121750irq/30-eth0_g0_00:07:340
121390ksoftirqd/1121750irq/30-eth0_g0_00:07:340
104622390sleep1121650irq/29-eth0_g0_22:00:151
67899381cyclictest17375-21unixbench_singl20:15:191
67899381cyclictest14776-21fgrep20:05:141
67899381cyclictest13249-21wc00:25:121
121750380irq/30-eth0_g0_470-21kworker/1:122:44:491
121750380irq/30-eth0_g0_470-21kworker/1:122:14:031
121750380irq/30-eth0_g0_470-21kworker/1:100:30:161
121750380irq/30-eth0_g0_121ksoftirqd/122:21:571
121750380irq/30-eth0_g0_121ksoftirqd/121:51:581
121650380irq/29-eth0_g0_31ksoftirqd/022:50:400
121650380irq/29-eth0_g0_31ksoftirqd/022:50:400
121650380irq/29-eth0_g0_28268-21/usr/sbin/munin23:15:100
121650380irq/29-eth0_g0_2029-21runrttasks20:20:150
121650380irq/29-eth0_g0_13-21kworker/0:122:00:380
121650380irq/29-eth0_g0_13-21kworker/0:121:51:230
121650380irq/29-eth0_g0_13-21kworker/0:121:43:410
121650380irq/29-eth0_g0_13-21kworker/0:121:22:510
121380ksoftirqd/1121750irq/30-eth0_g0_20:03:170
121380ksoftirqd/1121650irq/29-eth0_g0_22:33:181
121380ksoftirqd/1121650irq/29-eth0_g0_19:32:541
121380ksoftirqd/1121650irq/29-eth0_g0_00:05:041
121380ksoftirqd/1121650irq/29-eth0_g0_00:05:041
67899371cyclictest27103-21grep20:55:151
67899371cyclictest16643-21cat20:14:551
121750370irq/30-eth0_g0_121ksoftirqd/122:26:531
121650370irq/29-eth0_g0_769-21/usr/sbin/munin19:10:100
121650370irq/29-eth0_g0_20574-21iostat20:30:070
121650370irq/29-eth0_g0_2029-21runrttasks00:12:010
121650370irq/29-eth0_g0_13-21kworker/0:123:47:250
121650370irq/29-eth0_g0_13-21kworker/0:121:12:570
121650370irq/29-eth0_g0_10818-21latency19:50:090
678993621cyclictest29365-21processes21:05:141
67899362cyclictest2029-21runrttasks20:49:281
67899361cyclictest22991-21ethtool20:40:071
67899361cyclictest13858-21grep22:15:091
67899361cyclictest0-21swapper/119:59:551
121650360irq/29-eth0_g0_4626-21entropy19:25:080
121360ksoftirqd/1121750irq/30-eth0_g0_21:04:420
121360ksoftirqd/1121650irq/29-eth0_g0_20:30:101
67899351cyclictest2236-21ethtool19:15:081
67899351cyclictest2236-21ethtool19:15:081
67899351cyclictest2029-21runrttasks20:52:591
67899351cyclictest18437-21grep20:20:151
67899351cyclictest13575-21sendmail_mailtr20:00:171
121650350irq/29-eth0_g0_29522-21sed21:05:170
121650350irq/29-eth0_g0_25688-21grep20:50:130
121650350irq/29-eth0_g0_23432-21unixbench_multi20:40:140
121650350irq/29-eth0_g0_2029-21runrttasks19:45:040
121650350irq/29-eth0_g0_2029-21runrttasks19:45:040
121650350irq/29-eth0_g0_17154-21ps20:15:160
121650350irq/29-eth0_g0_15531-21df20:10:070
121650350irq/29-eth0_g0_0-21swapper/019:15:110
121650350irq/29-eth0_g0_0-21swapper/019:15:110
67899341cyclictest28399-21vmstat21:00:161
67899341cyclictest195002sleep120:25:111
121650340irq/29-eth0_g0_3711-21proc_pri19:20:120
121650340irq/29-eth0_g0_22244-21unixbench_singl20:35:150
121650340irq/29-eth0_g0_193022chrt20:25:070
121310ksoftirqd/17082-21forks19:35:061
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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