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2026-07-14 - 00:10

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Mon Jul 13, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1814821270sleep0121650irq/29-eth0_g0_10:11:360
90982860sleep1121650irq/29-eth0_g0_11:47:411
121600ksoftirqd/1234862sleep008:19:530
65272570chrt121650irq/29-eth0_g0_11:36:170
65272570chrt121650irq/29-eth0_g0_11:36:170
174272570sleep0121650irq/29-eth0_g0_07:55:370
115152560sleep1121750irq/30-eth0_g0_07:32:571
121540ksoftirqd/1121750irq/30-eth0_g0_09:49:151
121540ksoftirqd/1121750irq/30-eth0_g0_09:49:151
208402520sleep1121750irq/30-eth0_g0_12:33:191
121520ksoftirqd/1121750irq/30-eth0_g0_09:55:321
151302510sleep0121650irq/29-eth0_g0_12:11:490
121510ksoftirqd/1121750irq/30-eth0_g0_10:59:531
121510ksoftirqd/1121750irq/30-eth0_g0_10:54:231
121500ksoftirqd/1121750irq/30-eth0_g0_12:27:071
121500ksoftirqd/1121750irq/30-eth0_g0_11:41:191
121500ksoftirqd/1121650irq/29-eth0_g0_10:13:210
121490ksoftirqd/1121750irq/30-eth0_g0_10:01:481
168802470sleep0121750irq/30-eth0_g0_10:06:050
121470ksoftirqd/1121750irq/30-eth0_g0_12:20:521
121650450irq/29-eth0_g0_1964-21runrttasks07:05:350
121450ksoftirqd/1121650irq/29-eth0_g0_12:01:571
121450ksoftirqd/1121650irq/29-eth0_g0_07:14:241
121440ksoftirqd/1121750irq/30-eth0_g0_08:32:240
121440ksoftirqd/1121750irq/30-eth0_g0_07:33:180
121440ksoftirqd/1121650irq/29-eth0_g0_10:37:141
121440ksoftirqd/1121650irq/29-eth0_g0_10:37:141
121440ksoftirqd/1121650irq/29-eth0_g0_08:28:131
121750430irq/30-eth0_g0_1219-21kworker/1:209:30:131
121650430irq/29-eth0_g0_31ksoftirqd/009:30:490
121650430irq/29-eth0_g0_13-21kworker/0:110:53:090
121650430irq/29-eth0_g0_121ksoftirqd/111:48:050
121430ksoftirqd/1121750irq/30-eth0_g0_11:04:570
121430ksoftirqd/1121650irq/29-eth0_g0_12:32:161
121430ksoftirqd/1121650irq/29-eth0_g0_09:18:131
126672420sleep0121750irq/30-eth0_g0_12:01:340
121750420irq/30-eth0_g0_6309-21if_err_eth009:23:101
121750420irq/30-eth0_g0_121ksoftirqd/109:15:061
121650420irq/29-eth0_g0_13-21kworker/0:112:06:580
121650410irq/29-eth0_g0_31ksoftirqd/011:39:420
121650410irq/29-eth0_g0_31ksoftirqd/011:16:530
121650410irq/29-eth0_g0_31ksoftirqd/010:31:130
121650410irq/29-eth0_g0_1964-21runrttasks09:16:590
121650410irq/29-eth0_g0_121ksoftirqd/109:33:191
121410ksoftirqd/1121650irq/29-eth0_g0_08:00:131
540299401cyclictest5434-21grep07:07:581
540299401cyclictest24163-21missed_timers08:23:131
540299401cyclictest22049-21sed08:13:211
121750400irq/30-eth0_g0_1219-21kworker/1:210:32:161
121750400irq/30-eth0_g0_121ksoftirqd/112:14:211
121750400irq/30-eth0_g0_121ksoftirqd/112:14:211
121750400irq/30-eth0_g0_121ksoftirqd/112:09:551
121750400irq/30-eth0_g0_121ksoftirqd/111:15:591
121750400irq/30-eth0_g0_121ksoftirqd/110:09:081
121650400irq/29-eth0_g0_19850-21latency10:18:110
121650400irq/29-eth0_g0_13-21kworker/0:112:22:530
121650400irq/29-eth0_g0_13-21kworker/0:111:54:070
121650400irq/29-eth0_g0_13-21kworker/0:111:46:440
121650400irq/29-eth0_g0_13-21kworker/0:111:30:420
121650400irq/29-eth0_g0_121ksoftirqd/112:29:100
121400ksoftirqd/1121750irq/30-eth0_g0_12:13:100
121400ksoftirqd/1121750irq/30-eth0_g0_12:13:100
121400ksoftirqd/1121750irq/30-eth0_g0_10:52:080
121400ksoftirqd/1121750irq/30-eth0_g0_09:39:140
121400ksoftirqd/1121650irq/29-eth0_g0_09:40:541
121400ksoftirqd/1121650irq/29-eth0_g0_08:41:061
540299391cyclictest24772-21cat10:38:101
121750390irq/30-eth0_g0_1219-21kworker/1:211:03:191
121750390irq/30-eth0_g0_1219-21kworker/1:210:44:591
121750390irq/30-eth0_g0_1219-21kworker/1:210:17:051
121750390irq/30-eth0_g0_121ksoftirqd/109:45:181
121750390irq/30-eth0_g0_0-21swapper/110:21:011
121650390irq/29-eth0_g0_23780-21grep10:33:160
121650390irq/29-eth0_g0_23780-21grep10:33:160
121650390irq/29-eth0_g0_13-21kworker/0:112:24:080
121650390irq/29-eth0_g0_13-21kworker/0:111:08:050
121650390irq/29-eth0_g0_13-21kworker/0:110:58:180
121650390irq/29-eth0_g0_13-21kworker/0:110:42:370
121390ksoftirqd/1121750irq/30-eth0_g0_10:26:050
121390ksoftirqd/1121750irq/30-eth0_g0_10:01:090
121390ksoftirqd/1121750irq/30-eth0_g0_09:53:500
121390ksoftirqd/1121750irq/30-eth0_g0_09:33:310
121390ksoftirqd/1121750irq/30-eth0_g0_09:25:110
121390ksoftirqd/1121750irq/30-eth0_g0_09:22:460
121390ksoftirqd/1121750irq/30-eth0_g0_09:08:000
121390ksoftirqd/1121750irq/30-eth0_g0_09:07:560
121390ksoftirqd/1121750irq/30-eth0_g0_09:01:470
121390ksoftirqd/1121750irq/30-eth0_g0_08:46:270
121390ksoftirqd/1121750irq/30-eth0_g0_08:38:030
121390ksoftirqd/1121750irq/30-eth0_g0_08:34:120
121390ksoftirqd/1121750irq/30-eth0_g0_08:14:510
121390ksoftirqd/1121750irq/30-eth0_g0_07:47:470
121390ksoftirqd/1121750irq/30-eth0_g0_07:31:220
121390ksoftirqd/1121650irq/29-eth0_g0_08:56:421
540299381cyclictest3105-21grep09:08:191
540299381cyclictest0-21swapper/107:26:411
121750380irq/30-eth0_g0_1219-21kworker/1:212:03:211
121750380irq/30-eth0_g0_1219-21kworker/1:211:50:311
121750380irq/30-eth0_g0_121ksoftirqd/111:53:081
121650380irq/29-eth0_g0_13-21kworker/0:111:25:360
121650380irq/29-eth0_g0_13-21kworker/0:111:20:020
121650380irq/29-eth0_g0_13-21kworker/0:111:20:020
121650380irq/29-eth0_g0_1219-21kworker/1:211:35:011
121650380irq/29-eth0_g0_1219-21kworker/1:211:35:011
121650380irq/29-eth0_g0_121ksoftirqd/111:08:501
121380ksoftirqd/1121650irq/29-eth0_g0_08:48:191
540299372cyclictest11674-21df07:33:091
540299371cyclictest29035-21load08:43:131
540299371cyclictest2351-21diskmemload11:23:131
540299371cyclictest1805-21sort09:03:181
121650370irq/29-eth0_g0_52112sleep111:30:161
121650370irq/29-eth0_g0_13-21kworker/0:109:46:200
121370ksoftirqd/1121650irq/29-eth0_g0_12:34:050
121370ksoftirqd/1121650irq/29-eth0_g0_07:09:041
540299362cyclictest2109-21lldpd10:27:251
540299362cyclictest2109-21lldpd08:08:181
540299361cyclictest27612-21unixbench_singl10:48:181
540299361cyclictest26934-21unixbench_multi08:33:181
540299361cyclictest15748-21ps07:48:171
121750360irq/30-eth0_g0_2259-21ntp_offset11:18:151
121750360irq/30-eth0_g0_2259-21ntp_offset11:18:151
121650360irq/29-eth0_g0_9590-21runrttasks07:23:170
121650360irq/29-eth0_g0_1964-21runrttasks09:50:340
121650360irq/29-eth0_g0_1964-21runrttasks09:50:340
121650360irq/29-eth0_g0_1964-21runrttasks07:50:120
121650360irq/29-eth0_g0_19476-21zcat08:03:180
121650360irq/29-eth0_g0_13-21kworker/0:110:43:180
121360ksoftirqd/1121750irq/30-eth0_g0_08:55:470
121360ksoftirqd/1121750irq/30-eth0_g0_08:26:110
540299351cyclictest23251-21grep08:18:191
540299351cyclictest17179-21grep07:53:201
540299351cyclictest14190-21grep07:43:101
540299351cyclictest132242sleep107:38:141
121650350irq/29-eth0_g0_6964-21latency07:13:140
121650350irq/29-eth0_g0_5952-21proc_pri07:08:160
121650350irq/29-eth0_g0_20567-21ntp_states08:08:140
121650350irq/29-eth0_g0_1964-21runrttasks07:18:150
121650350irq/29-eth0_g0_13203-21awk07:38:130
121650350irq/29-eth0_g0_121ksoftirqd/110:03:571
121350ksoftirqd/1121650irq/29-eth0_g0_08:58:191
540299341cyclictest0-21swapper/108:03:021
121650340irq/29-eth0_g0_30649-21unixbench_singl08:48:190
121650340irq/29-eth0_g0_18270-21sendmail_mailst07:58:190
121340ksoftirqd/1121650irq/29-eth0_g0_07:22:371
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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