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2026-07-11 - 15:46

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 highest latencies:
System rack3slot5s.osadl.org (updated Sat Jul 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121960ksoftirqd/1121750irq/30-eth0_g0_12:23:210
121930ksoftirqd/1121750irq/30-eth0_g0_10:33:331
121850ksoftirqd/1121750irq/30-eth0_g0_07:06:561
121800ksoftirqd/1121750irq/30-eth0_g0_10:23:220
248132740sleep1121750irq/30-eth0_g0_11:58:181
299502660sleep0121650irq/29-eth0_g0_12:18:220
121640ksoftirqd/1121750irq/30-eth0_g0_11:15:010
97882600sleep0121750irq/30-eth0_g0_10:58:100
121570ksoftirqd/1121750irq/30-eth0_g0_09:38:011
260232560sleep1121750irq/30-eth0_g0_09:51:141
292452520sleep1121750irq/30-eth0_g0_12:17:141
121510ksoftirqd/1230622sleep011:51:390
121490ksoftirqd/1121750irq/30-eth0_g0_11:53:220
121490ksoftirqd/1121750irq/30-eth0_g0_10:53:411
168012460sleep1121650irq/29-eth0_g0_11:25:061
168012460sleep1121650irq/29-eth0_g0_11:25:061
121460ksoftirqd/1121750irq/30-eth0_g0_12:33:201
121460ksoftirqd/1121750irq/30-eth0_g0_12:06:221
121460ksoftirqd/1121750irq/30-eth0_g0_09:31:231
93682450sleep0121650irq/29-eth0_g0_10:54:100
121750450irq/30-eth0_g0_15302-21df09:08:141
121450ksoftirqd/1121750irq/30-eth0_g0_10:49:461
121650440irq/29-eth0_g0_17228-21/usr/sbin/munin07:03:160
121440ksoftirqd/1121750irq/30-eth0_g0_11:33:041
121440ksoftirqd/1121750irq/30-eth0_g0_10:41:071
121440ksoftirqd/1121650irq/29-eth0_g0_09:40:191
121440ksoftirqd/1121650irq/29-eth0_g0_07:46:041
121650430irq/29-eth0_g0_1958-21crond12:38:010
121430ksoftirqd/1121650irq/29-eth0_g0_09:24:581
185972420sleep1121750irq/30-eth0_g0_09:20:181
121750420irq/30-eth0_g0_1219-21kworker/1:212:08:451
121750420irq/30-eth0_g0_1219-21kworker/1:211:56:251
121750420irq/30-eth0_g0_1219-21kworker/1:210:13:421
121650420irq/29-eth0_g0_121ksoftirqd/110:31:420
121420ksoftirqd/1121650irq/29-eth0_g0_10:28:021
121650410irq/29-eth0_g0_31ksoftirqd/011:05:450
121650410irq/29-eth0_g0_1813899cyclictest09:22:050
121650410irq/29-eth0_g0_15147-21diskmemload10:47:341
121410ksoftirqd/1121750irq/30-eth0_g0_10:36:390
1813999401cyclictest8475-21chrt08:38:221
1813999401cyclictest19514-21taskset07:13:151
1813999401cyclictest0-21swapper/111:05:441
121750400irq/30-eth0_g0_1734-21chrt08:13:131
121650400irq/29-eth0_g0_31ksoftirqd/010:03:230
121650400irq/29-eth0_g0_31ksoftirqd/010:03:230
121650400irq/29-eth0_g0_13-21kworker/0:111:27:460
121650400irq/29-eth0_g0_13-21kworker/0:111:27:460
121650400irq/29-eth0_g0_13-21kworker/0:110:52:420
121650400irq/29-eth0_g0_13-21kworker/0:110:15:470
121650400irq/29-eth0_g0_13-21kworker/0:109:33:380
121650400irq/29-eth0_g0_13-21kworker/0:109:26:190
121650400irq/29-eth0_g0_13-21kworker/0:109:10:310
121400ksoftirqd/1121750irq/30-eth0_g0_11:43:520
121400ksoftirqd/1121650irq/29-eth0_g0_08:18:190
1813999392cyclictest22276-21iostat11:48:161
1813999391cyclictest10093-21cat10:58:171
121750390irq/30-eth0_g0_13-21kworker/0:111:33:240
121750390irq/30-eth0_g0_121ksoftirqd/109:43:201
121650390irq/29-eth0_g0_31ksoftirqd/012:14:420
121650390irq/29-eth0_g0_31ksoftirqd/012:07:270
121650390irq/29-eth0_g0_31ksoftirqd/010:09:010
121650390irq/29-eth0_g0_1813899cyclictest10:21:290
121650390irq/29-eth0_g0_13-21kworker/0:111:58:230
121650390irq/29-eth0_g0_13-21kworker/0:110:40:150
121650390irq/29-eth0_g0_0-21swapper/009:53:020
121390ksoftirqd/1121750irq/30-eth0_g0_11:18:230
121390ksoftirqd/1121750irq/30-eth0_g0_10:45:050
1813999381cyclictest32350-21grep08:03:241
1813999381cyclictest32350-21grep08:03:241
1813999381cyclictest21292-21proc_pri11:43:221
1813999381cyclictest12564-21wc11:08:181
121750380irq/30-eth0_g0_32326-21proc_pri12:28:221
121750380irq/30-eth0_g0_29408-21/usr/sbin/munin12:18:151
121750380irq/30-eth0_g0_1964-21runrttasks07:48:580
121750380irq/30-eth0_g0_14880-21seq09:04:581
121750380irq/30-eth0_g0_1219-21kworker/1:211:20:091
121750380irq/30-eth0_g0_0-21swapper/111:16:461
121750380irq/30-eth0_g0_0-21swapper/109:13:231
121650380irq/29-eth0_g0_31ksoftirqd/009:59:430
121650380irq/29-eth0_g0_31ksoftirqd/009:55:180
121650380irq/29-eth0_g0_26820-21/usr/sbin/munin07:43:180
121650380irq/29-eth0_g0_20605-21proc_pri09:28:220
121650380irq/29-eth0_g0_20109-21tail07:13:260
121650380irq/29-eth0_g0_13-21kworker/0:112:32:580
121650380irq/29-eth0_g0_13-21kworker/0:111:42:390
121650380irq/29-eth0_g0_121ksoftirqd/112:09:060
121650380irq/29-eth0_g0_121ksoftirqd/111:41:461
121380ksoftirqd/1121750irq/30-eth0_g0_09:16:350
121380ksoftirqd/1121750irq/30-eth0_g0_08:15:550
121750370irq/30-eth0_g0_29496-21/usr/sbin/munin07:53:171
121750370irq/30-eth0_g0_1219-21kworker/1:209:53:051
121750370irq/30-eth0_g0_121ksoftirqd/112:26:051
121750370irq/30-eth0_g0_0-21swapper/110:06:001
121750370irq/30-eth0_g0_0-21swapper/110:06:001
121650370irq/29-eth0_g0_13-21kworker/0:111:09:480
121650370irq/29-eth0_g0_13-21kworker/0:109:44:090
121650370irq/29-eth0_g0_10860-21rt-features08:48:220
121370ksoftirqd/1121650irq/29-eth0_g0_10:08:161
1813999362cyclictest10486-21df_inode08:48:141
1813999361cyclictest31161-21grep07:58:231
1813999361cyclictest28278-21taskset07:48:171
1813999361cyclictest28138-21unixbench_multi09:58:241
1813999361cyclictest260552sleep107:38:211
1813999361cyclictest23668-21fgrep07:28:241
1813999361cyclictest17825-21unixbench_singl11:28:261
1813999361cyclictest17825-21unixbench_singl11:28:261
1813999361cyclictest12024-21proc_pri08:53:221
121750360irq/30-eth0_g0_25181-21taskset07:34:271
121750360irq/30-eth0_g0_25181-21taskset07:34:271
121750360irq/30-eth0_g0_1219-21kworker/1:210:21:201
121650360irq/29-eth0_g0_9783-21unixbench_singl08:43:250
121650360irq/29-eth0_g0_8523-21unixbench_multi08:38:220
121650360irq/29-eth0_g0_5731-21cat08:28:170
121650360irq/29-eth0_g0_31148-21grep07:58:220
121650360irq/29-eth0_g0_23832-21grep07:28:250
121650360irq/29-eth0_g0_1964-21runrttasks07:56:210
121650360irq/29-eth0_g0_14674-21sed09:03:230
121650360irq/29-eth0_g0_13086-21missed_timers08:58:170
121650360irq/29-eth0_g0_13086-21missed_timers08:58:170
121650360irq/29-eth0_g0_13-21kworker/0:111:28:440
121650360irq/29-eth0_g0_13-21kworker/0:111:28:440
121650360irq/29-eth0_g0_13-21kworker/0:109:41:370
121360ksoftirqd/1121650irq/29-eth0_g0_10:28:251
18139993529cyclictest68882sleep108:33:161
1813999352cyclictest6071-21unixbench_multi08:28:241
1813999351cyclictest3690-21uptime08:18:241
121650350irq/29-eth0_g0_26118-21sendmail_mailqu07:38:220
121650350irq/29-eth0_g0_22176-21sort07:23:160
121650350irq/29-eth0_g0_1964-21runrttasks08:34:520
121650350irq/29-eth0_g0_1964-21runrttasks08:27:460
121650350irq/29-eth0_g0_1964-21runrttasks07:08:460
1813999341cyclictest550-21seq08:08:141
1813999341cyclictest550-21seq08:08:141
1813999341cyclictest22140-21sh07:23:151
1813999341cyclictest18888-21tail07:08:241
121650340irq/29-eth0_g0_559-21df_abs08:08:140
121650340irq/29-eth0_g0_559-21df_abs08:08:140
121650340irq/29-eth0_g0_21332-21tail07:18:240
121650340irq/29-eth0_g0_1964-21runrttasks07:37:340
121650340irq/29-eth0_g0_1964-21runrttasks07:37:340
1813999331cyclictest131002sleep108:58:181
1813999331cyclictest131002sleep108:58:181
1813999331cyclictest0-21swapper/108:27:111
121650330irq/29-eth0_g0_1964-21runrttasks08:56:500
121650330irq/29-eth0_g0_1964-21runrttasks08:04:010
121650330irq/29-eth0_g0_1964-21runrttasks08:04:010
121650330irq/29-eth0_g0_1813999cyclictest08:43:211
121750310irq/30-eth0_g0_21057-21ntpdc07:18:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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