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2026-07-29 - 20:03

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 Wed Jul 29, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1601721400sleep1121650irq/29-eth0_g0_11:35:241
1211070ksoftirqd/1121750irq/30-eth0_g0_08:14:271
729721040sleep0121650irq/29-eth0_g0_10:58:350
729721040sleep0121650irq/29-eth0_g0_10:58:350
121950ksoftirqd/1121750irq/30-eth0_g0_09:09:001
239532750sleep1121750irq/30-eth0_g0_09:55:241
94652740sleep0121750irq/30-eth0_g0_11:07:400
121720ksoftirqd/1121650irq/29-eth0_g0_12:17:401
121720ksoftirqd/1121650irq/29-eth0_g0_12:17:401
121590ksoftirqd/1155592sleep009:22:190
121580ksoftirqd/1121750irq/30-eth0_g0_09:32:351
121750570irq/30-eth0_g0_1219-21kworker/1:210:10:551
121570ksoftirqd/1121750irq/30-eth0_g0_12:02:560
249742520sleep1121750irq/30-eth0_g0_09:58:021
203152510sleep0121750irq/30-eth0_g0_09:40:440
121510ksoftirqd/1121650irq/29-eth0_g0_12:36:430
121500ksoftirqd/1121750irq/30-eth0_g0_09:39:141
288962490sleep1121750irq/30-eth0_g0_10:15:551
121490ksoftirqd/1121750irq/30-eth0_g0_11:27:390
121650470irq/29-eth0_g0_27821-21sendmail_mailqu12:22:400
121650470irq/29-eth0_g0_1964-21runrttasks09:46:590
121750460irq/30-eth0_g0_121ksoftirqd/112:14:221
121750460irq/30-eth0_g0_0-21swapper/111:52:211
121650460irq/29-eth0_g0_31ksoftirqd/008:57:400
121460ksoftirqd/1121750irq/30-eth0_g0_10:34:361
121460ksoftirqd/1121750irq/30-eth0_g0_10:34:361
121450ksoftirqd/1121750irq/30-eth0_g0_11:41:181
121450ksoftirqd/1121650irq/29-eth0_g0_09:48:390
121450ksoftirqd/1121650irq/29-eth0_g0_07:02:311
121750440irq/30-eth0_g0_21771-21/usr/sbin/munin09:47:391
121750440irq/30-eth0_g0_1219-21kworker/1:211:58:481
121440ksoftirqd/1121750irq/30-eth0_g0_11:42:160
50422430sleep1121750irq/30-eth0_g0_10:50:531
121750430irq/30-eth0_g0_1219-21kworker/1:212:09:251
121650430irq/29-eth0_g0_14527-21unixbench_singl07:02:410
121430ksoftirqd/1121650irq/29-eth0_g0_09:54:350
121750420irq/30-eth0_g0_1219-21kworker/1:209:23:551
121650420irq/29-eth0_g0_13-21kworker/0:111:55:310
121420ksoftirqd/1121650irq/29-eth0_g0_11:05:561
98252410sleep1121750irq/30-eth0_g0_11:09:311
314392410sleep1121650irq/29-eth0_g0_10:27:011
121750410irq/30-eth0_g0_1219-21kworker/1:212:02:331
121750410irq/30-eth0_g0_1219-21kworker/1:211:52:191
121650410irq/29-eth0_g0_1964-21runrttasks08:09:370
121650410irq/29-eth0_g0_13-21kworker/0:110:09:180
121650410irq/29-eth0_g0_121ksoftirqd/110:42:351
121410ksoftirqd/1121650irq/29-eth0_g0_10:43:490
121750400irq/30-eth0_g0_1219-21kworker/1:210:57:341
121750400irq/30-eth0_g0_1219-21kworker/1:210:57:341
121650400irq/29-eth0_g0_31ksoftirqd/012:22:050
121650400irq/29-eth0_g0_31ksoftirqd/012:22:050
121650400irq/29-eth0_g0_31ksoftirqd/011:19:450
121650400irq/29-eth0_g0_31ksoftirqd/010:29:200
121650400irq/29-eth0_g0_31ksoftirqd/010:02:420
121650400irq/29-eth0_g0_13-21kworker/0:112:12:530
121650400irq/29-eth0_g0_13-21kworker/0:111:47:370
121650400irq/29-eth0_g0_13-21kworker/0:109:33:170
121400ksoftirqd/141250irq/22-fsldma-c07:12:411
121400ksoftirqd/1121650irq/29-eth0_g0_10:21:021
121400ksoftirqd/1121650irq/29-eth0_g0_10:04:511
1497299391cyclictest11447-21grep09:02:421
1497299391cyclictest11447-21grep09:02:421
121750390irq/30-eth0_g0_1219-21kworker/1:211:28:571
121750390irq/30-eth0_g0_1219-21kworker/1:210:53:531
121750390irq/30-eth0_g0_0-21swapper/110:28:181
121650390irq/29-eth0_g0_13-21kworker/0:110:51:450
121650390irq/29-eth0_g0_13-21kworker/0:110:38:510
121390ksoftirqd/1121650irq/29-eth0_g0_12:29:041
121390ksoftirqd/1121650irq/29-eth0_g0_08:27:350
1497299387cyclictest121750irq/30-eth0_g0_09:47:051
1497299381cyclictest3888-21proc_pri08:32:381
1497299381cyclictest14636-21ethtool09:17:331
121750380irq/30-eth0_g0_12191kworker/1:211:14:411
121750380irq/30-eth0_g0_1219-21kworker/1:210:40:451
121650380irq/29-eth0_g0_24673-21proc_pri09:57:390
121650380irq/29-eth0_g0_21629-21proc_pri11:57:390
121650380irq/29-eth0_g0_13-21kworker/0:111:33:550
121650380irq/29-eth0_g0_13-21kworker/0:111:05:010
121650380irq/29-eth0_g0_13-21kworker/0:110:12:560
121650380irq/29-eth0_g0_13-21kworker/0:109:10:110
121380ksoftirqd/1121650irq/29-eth0_g0_10:17:570
121380ksoftirqd/1121650irq/29-eth0_g0_08:46:581
1497299371cyclictest8961-21grep08:52:401
1497299371cyclictest176582sleep111:42:331
1497299371cyclictest176582sleep111:42:331
121750370irq/30-eth0_g0_1219-21kworker/1:212:24:391
121750370irq/30-eth0_g0_0-21swapper/109:31:331
121650370irq/29-eth0_g0_8258-21latency_hist08:52:190
121650370irq/29-eth0_g0_5792-21find10:52:390
121650370irq/29-eth0_g0_28462-21seq08:02:200
121650370irq/29-eth0_g0_1964-21runrttasks11:23:390
121650370irq/29-eth0_g0_1964-21runrttasks08:05:450
121650370irq/29-eth0_g0_1964-21runrttasks07:13:110
121650370irq/29-eth0_g0_1964-21runrttasks07:11:020
121650370irq/29-eth0_g0_13-21kworker/0:112:30:010
121650370irq/29-eth0_g0_13-21kworker/0:112:07:470
121650370irq/29-eth0_g0_13-21kworker/0:110:33:020
121650370irq/29-eth0_g0_13-21kworker/0:110:33:020
121650370irq/29-eth0_g0_13-21kworker/0:110:24:550
121650370irq/29-eth0_g0_11912-21rt-features11:17:411
1497299361cyclictest7560-21wc08:47:381
1497299361cyclictest30917-21cat08:12:201
1497299361cyclictest11890-21diskmemload12:32:381
121750360irq/30-eth0_g0_1497299cyclictest11:22:311
121650360irq/29-eth0_g0_31ksoftirqd/009:29:520
121650360irq/29-eth0_g0_25157-21missed_timers07:47:360
121650360irq/29-eth0_g0_23080-21unixbench_singl07:37:410
121650360irq/29-eth0_g0_20427-21proc_pri07:27:390
121650360irq/29-eth0_g0_1964-21runrttasks09:26:000
121650360irq/29-eth0_g0_1964-21runrttasks08:40:560
121650360irq/29-eth0_g0_1964-21runrttasks07:46:420
121650360irq/29-eth0_g0_13-21kworker/0:111:44:060
121650360irq/29-eth0_g0_13-21kworker/0:111:44:060
121650360irq/29-eth0_g0_13-21kworker/0:108:22:380
121650360irq/29-eth0_g0_10797-21unixbench_multi11:12:410
121650360irq/29-eth0_g0_0-21swapper/009:12:350
1497299352cyclictest27695-21ntp_states07:57:391
1497299352cyclictest18169-21sed07:17:411
1497299351cyclictest5045-21runrttasks08:37:381
1497299351cyclictest26707-21grep07:52:421
1497299351cyclictest22964-21sendmail_mailtr07:37:401
1497299351cyclictest21729-21mailstats07:32:391
1497299351cyclictest20599-21tail07:27:421
1497299351cyclictest12532sleep108:22:351
121750350irq/30-eth0_g0_0-21swapper/108:17:401
121650350irq/29-eth0_g0_3579-21df_abs08:32:310
121650350irq/29-eth0_g0_2971-21runrttasks08:28:021
121650350irq/29-eth0_g0_1964-21runrttasks08:18:530
121650350irq/29-eth0_g0_1964-21runrttasks08:16:020
121650350irq/29-eth0_g0_18202-21runrttasks07:17:420
121650350irq/29-eth0_g0_11420-21unixbench_multi09:02:410
121650350irq/29-eth0_g0_11420-21unixbench_multi09:02:410
121650350irq/29-eth0_g0_0-21swapper/008:54:150
121350ksoftirqd/1121650irq/29-eth0_g0_07:07:341
1497299341cyclictest23693-21seq07:42:311
121750340irq/30-eth0_g0_1219-21kworker/1:209:14:051
121650340irq/29-eth0_g0_21709-21zcat07:32:390
121650340irq/29-eth0_g0_1964-21runrttasks07:24:250
121650340irq/29-eth0_g0_0-21swapper/008:47:190
121650340irq/29-eth0_g0_0-21swapper/007:52:320
1497299331cyclictest24839-21date07:47:201
1497299331cyclictest189062sleep107:22:331
1497299331cyclictest107192sleep109:02:201
1497299331cyclictest0-21swapper/108:02:391
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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