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2026-03-29 - 16:05

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 100 highest latencies:
System rack3slot5s.osadl.org (updated Sun Mar 29, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1221399148140cyclictest0-21swapper/109:20:301
1221399148140cyclictest0-21swapper/108:44:101
1221399148140cyclictest0-21swapper/108:44:101
1221399146138cyclictest0-21swapper/110:17:151
2670921140sleep1121650irq/29-eth0_g0_10:53:331
121770ksoftirqd/1121750irq/30-eth0_g0_09:09:501
82082750sleep1121650irq/29-eth0_g0_09:10:021
121730ksoftirqd/1121750irq/30-eth0_g0_07:53:371
313712680sleep1121650irq/29-eth0_g0_11:10:451
121680ksoftirqd/1121750irq/30-eth0_g0_10:55:020
121750610irq/30-eth0_g0_1221399cyclictest07:25:041
121590ksoftirqd/1121750irq/30-eth0_g0_12:33:071
121590ksoftirqd/1121750irq/30-eth0_g0_11:41:530
121590ksoftirqd/1121750irq/30-eth0_g0_11:07:531
121560ksoftirqd/1121750irq/30-eth0_g0_09:42:161
121560ksoftirqd/1121650irq/29-eth0_g0_11:50:001
121550ksoftirqd/1121650irq/29-eth0_g0_12:01:211
121540ksoftirqd/1121750irq/30-eth0_g0_10:20:191
121540ksoftirqd/1121750irq/30-eth0_g0_10:12:591
121530ksoftirqd/1121750irq/30-eth0_g0_10:35:031
121520ksoftirqd/1121650irq/29-eth0_g0_12:19:531
121520ksoftirqd/1121650irq/29-eth0_g0_12:05:121
121750510irq/30-eth0_g0_1221399cyclictest11:46:261
121510ksoftirqd/1121750irq/30-eth0_g0_10:45:091
121510ksoftirqd/1121650irq/29-eth0_g0_12:35:161
121510ksoftirqd/1121650irq/29-eth0_g0_12:35:161
121510ksoftirqd/1121650irq/29-eth0_g0_12:16:590
121750500irq/30-eth0_g0_1221399cyclictest12:29:501
121750500irq/30-eth0_g0_1221399cyclictest10:26:451
121750500irq/30-eth0_g0_1221399cyclictest10:03:081
121500ksoftirqd/1121750irq/30-eth0_g0_11:40:551
121500ksoftirqd/1121750irq/30-eth0_g0_10:42:081
121500ksoftirqd/1121750irq/30-eth0_g0_10:32:521
121750490irq/30-eth0_g0_1221399cyclictest10:57:231
121490ksoftirqd/1121750irq/30-eth0_g0_12:15:151
121490ksoftirqd/1121750irq/30-eth0_g0_11:36:401
121490ksoftirqd/1121750irq/30-eth0_g0_11:34:291
121490ksoftirqd/1121750irq/30-eth0_g0_11:34:291
121490ksoftirqd/1121650irq/29-eth0_g0_11:05:220
121480ksoftirqd/1121750irq/30-eth0_g0_11:19:311
121470ksoftirqd/1121750irq/30-eth0_g0_09:51:231
121470ksoftirqd/1121750irq/30-eth0_g0_09:50:450
121470ksoftirqd/1121650irq/29-eth0_g0_11:25:531
121650460irq/29-eth0_g0_4988-21/usr/sbin/munin11:35:120
121460ksoftirqd/1121750irq/30-eth0_g0_09:44:581
121650450irq/29-eth0_g0_31ksoftirqd/010:32:170
121650450irq/29-eth0_g0_29882-21ntp_offset08:20:060
121650450irq/29-eth0_g0_0-21swapper/007:09:490
121450ksoftirqd/1121750irq/30-eth0_g0_11:57:260
121450ksoftirqd/1121650irq/29-eth0_g0_12:14:141
121440ksoftirqd/1121750irq/30-eth0_g0_11:46:320
121440ksoftirqd/1121750irq/30-eth0_g0_10:50:090
121440ksoftirqd/1121650irq/29-eth0_g0_09:55:471
121440ksoftirqd/1121650irq/29-eth0_g0_09:49:160
121440ksoftirqd/1121650irq/29-eth0_g0_09:14:440
121650430irq/29-eth0_g0_121ksoftirqd/110:22:240
121430ksoftirqd/1121750irq/30-eth0_g0_11:20:330
121430ksoftirqd/1121750irq/30-eth0_g0_08:15:240
121430ksoftirqd/1121750irq/30-eth0_g0_08:15:240
1221399422cyclictest25713-21munin-run08:04:501
121650420irq/29-eth0_g0_31ksoftirqd/012:26:550
121650420irq/29-eth0_g0_31ksoftirqd/012:23:070
121650420irq/29-eth0_g0_12531-21runrttasks12:08:420
121420ksoftirqd/1121650irq/29-eth0_g0_12:34:140
121420ksoftirqd/1121650irq/29-eth0_g0_09:43:500
121750410irq/30-eth0_g0_22496-21chrt10:35:080
121650410irq/29-eth0_g0_121ksoftirqd/110:43:550
121410ksoftirqd/1121750irq/30-eth0_g0_11:28:250
1221399402cyclictest3664-21taskset08:50:071
1221399401cyclictest5091-21unixbench_multi08:55:101
121750400irq/30-eth0_g0_166032sleep110:06:451
121650400irq/29-eth0_g0_31ksoftirqd/009:18:090
121650400irq/29-eth0_g0_1875-21runrttasks07:26:420
121650400irq/29-eth0_g0_13-21kworker/0:112:35:380
121650400irq/29-eth0_g0_13-21kworker/0:112:35:380
121650400irq/29-eth0_g0_13-21kworker/0:112:12:120
121650400irq/29-eth0_g0_1221299cyclictest11:32:190
121650400irq/29-eth0_g0_1221299cyclictest11:32:190
121400ksoftirqd/1121650irq/29-eth0_g0_10:25:290
1221399392cyclictest1251-21grep11:20:101
1221399391cyclictest32322-21/usr/sbin/munin08:30:061
1221399391cyclictest26942-21seq08:09:501
1221399391cyclictest24081-21vmstat07:55:111
1221399391cyclictest208032sleep107:44:491
121650390irq/29-eth0_g0_31410-21unixbench_singl08:25:110
121650390irq/29-eth0_g0_31ksoftirqd/010:06:430
121650390irq/29-eth0_g0_227352chrt07:50:080
121650390irq/29-eth0_g0_1875-21runrttasks07:06:121
121650390irq/29-eth0_g0_17533-21iostat10:15:030
121650390irq/29-eth0_g0_13-21kworker/0:112:01:130
121650390irq/29-eth0_g0_13-21kworker/0:109:58:120
1221399382cyclictest30622-21munin-run08:24:491
1221399382cyclictest28551-21memory08:15:041
1221399382cyclictest28551-21memory08:15:041
1221399382cyclictest28438-21grep11:00:061
1221399381cyclictest31099-21runrttasks08:25:061
1221399381cyclictest18766-21missed_timers07:35:071
1221399381cyclictest175972sleep107:30:071
1221399381cyclictest12459-21taskset07:10:001
121650380irq/29-eth0_g0_5859-21/usr/sbin/munin09:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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