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2026-06-20 - 11:31

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 Jun 20, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1087321510sleep1121650irq/29-eth0_g0_23:08:521
343321480sleep1121650irq/29-eth0_g0_22:37:561
121790ksoftirqd/1121750irq/30-eth0_g0_00:25:301
198522680sleep0121650irq/29-eth0_g0_21:32:200
253532640sleep1121650irq/29-eth0_g0_00:06:081
220122620sleep1121750irq/30-eth0_g0_23:54:051
316422610sleep0121650irq/29-eth0_g0_00:32:510
129462590sleep0121650irq/29-eth0_g0_23:14:270
121540ksoftirqd/1121750irq/30-eth0_g0_21:38:011
119802530sleep0121750irq/30-eth0_g0_23:12:280
121510ksoftirqd/1121750irq/30-eth0_g0_21:53:271
121500ksoftirqd/1121750irq/30-eth0_g0_22:11:271
121500ksoftirqd/1121750irq/30-eth0_g0_22:11:271
121500ksoftirqd/1121750irq/30-eth0_g0_00:18:321
121490ksoftirqd/1121750irq/30-eth0_g0_23:30:401
121490ksoftirqd/1121750irq/30-eth0_g0_21:58:271
89042470sleep0121650irq/29-eth0_g0_22:59:110
89042470sleep0121650irq/29-eth0_g0_22:59:110
84022470sleep1121750irq/30-eth0_g0_20:44:161
252542460sleep0121650irq/29-eth0_g0_00:04:580
121650460irq/29-eth0_g0_20091-21sendmail_mailqu23:44:130
121450ksoftirqd/1121750irq/30-eth0_g0_22:27:571
121450ksoftirqd/1121650irq/29-eth0_g0_22:49:131
121650440irq/29-eth0_g0_13-21kworker/0:121:26:170
121440ksoftirqd/1121750irq/30-eth0_g0_21:14:420
121440ksoftirqd/1121650irq/29-eth0_g0_21:19:111
121440ksoftirqd/1121650irq/29-eth0_g0_21:06:391
121440ksoftirqd/1121650irq/29-eth0_g0_20:09:121
121750430irq/30-eth0_g0_121ksoftirqd/123:09:131
121650430irq/29-eth0_g0_15945-21cat19:04:080
121650430irq/29-eth0_g0_121ksoftirqd/121:24:041
121430ksoftirqd/1121650irq/29-eth0_g0_20:24:151
121430ksoftirqd/1121650irq/29-eth0_g0_20:24:151
121750420irq/30-eth0_g0_1219-21kworker/1:200:03:541
121650420irq/29-eth0_g0_13-21kworker/0:123:24:280
121420ksoftirqd/1121650irq/29-eth0_g0_21:42:381
1682699415cyclictest9025-21processes22:59:131
1682699415cyclictest9025-21processes22:59:131
121750410irq/30-eth0_g0_31ksoftirqd/021:42:210
121750410irq/30-eth0_g0_1219-21kworker/1:200:12:561
121750410irq/30-eth0_g0_121ksoftirqd/122:57:091
121750410irq/30-eth0_g0_121ksoftirqd/122:57:091
121750410irq/30-eth0_g0_121ksoftirqd/121:44:121
121650410irq/29-eth0_g0_31ksoftirqd/020:44:160
121650410irq/29-eth0_g0_13-21kworker/0:123:04:300
121650410irq/29-eth0_g0_13-21kworker/0:122:48:120
121650410irq/29-eth0_g0_13-21kworker/0:100:22:120
121650410irq/29-eth0_g0_121ksoftirqd/123:48:551
121410ksoftirqd/1121650irq/29-eth0_g0_19:34:101
121750400irq/30-eth0_g0_1219-21kworker/1:223:15:371
121650400irq/29-eth0_g0_31ksoftirqd/022:09:140
121650400irq/29-eth0_g0_31ksoftirqd/022:09:140
121650400irq/29-eth0_g0_31ksoftirqd/020:49:140
121650400irq/29-eth0_g0_31ksoftirqd/019:19:100
121650400irq/29-eth0_g0_1964-21runrttasks00:34:470
121650400irq/29-eth0_g0_13-21kworker/0:122:34:590
121650400irq/29-eth0_g0_13-21kworker/0:122:32:500
121650400irq/29-eth0_g0_13-21kworker/0:122:24:190
121650400irq/29-eth0_g0_13-21kworker/0:121:35:230
121650400irq/29-eth0_g0_13-21kworker/0:121:19:160
121650400irq/29-eth0_g0_13-21kworker/0:121:09:300
121650400irq/29-eth0_g0_13-21kworker/0:100:25:320
121650400irq/29-eth0_g0_13-21kworker/0:100:18:160
121750390irq/30-eth0_g0_31ksoftirqd/022:39:290
121750390irq/30-eth0_g0_1219-21kworker/1:222:22:241
121750390irq/30-eth0_g0_121ksoftirqd/122:48:071
121750390irq/30-eth0_g0_121ksoftirqd/122:14:041
121650390irq/29-eth0_g0_31ksoftirqd/022:58:060
121650390irq/29-eth0_g0_31ksoftirqd/022:58:060
121650390irq/29-eth0_g0_29899-21egrep22:14:040
121650390irq/29-eth0_g0_26410-21taskset21:59:070
121650390irq/29-eth0_g0_13-21kworker/0:123:49:490
121650390irq/29-eth0_g0_13-21kworker/0:123:41:290
121650390irq/29-eth0_g0_13-21kworker/0:123:36:040
121650390irq/29-eth0_g0_13-21kworker/0:123:31:420
121650390irq/29-eth0_g0_13-21kworker/0:122:05:330
121650390irq/29-eth0_g0_13-21kworker/0:100:09:110
121650390irq/29-eth0_g0_121ksoftirqd/123:57:240
121650390irq/29-eth0_g0_121ksoftirqd/123:50:111
121390ksoftirqd/1121650irq/29-eth0_g0_23:39:251
121390ksoftirqd/1121650irq/29-eth0_g0_22:03:481
121390ksoftirqd/1121650irq/29-eth0_g0_20:54:111
121390ksoftirqd/1121650irq/29-eth0_g0_19:54:361
121390ksoftirqd/1121650irq/29-eth0_g0_19:15:581
121390ksoftirqd/1121650irq/29-eth0_g0_19:10:381
1682699389cyclictest121750irq/30-eth0_g0_23:37:001
1682699381cyclictest4810-21grep20:29:161
1682699381cyclictest2356-21sort22:33:551
121750380irq/30-eth0_g0_1219-21kworker/1:223:25:261
121750380irq/30-eth0_g0_1219-21kworker/1:200:29:431
121650380irq/29-eth0_g0_6060-21/usr/sbin/munin22:49:040
121650380irq/29-eth0_g0_31962-21sort20:09:090
121650380irq/29-eth0_g0_23928-21forks21:49:070
121650380irq/29-eth0_g0_1964-21runrttasks20:43:080
121650380irq/29-eth0_g0_13-21kworker/0:123:19:230
121650380irq/29-eth0_g0_13-21kworker/0:122:20:590
121650380irq/29-eth0_g0_13-21kworker/0:121:58:380
121650380irq/29-eth0_g0_10945-21unixbench_singl20:54:170
121380ksoftirqd/1121750irq/30-eth0_g0_21:48:160
121380ksoftirqd/1121650irq/29-eth0_g0_20:50:091
121380ksoftirqd/1121650irq/29-eth0_g0_19:29:171
121380ksoftirqd/1121650irq/29-eth0_g0_19:29:171
1682699372cyclictest2109-21lldpd21:33:371
1682699371cyclictest4803-21cat22:43:551
1682699371cyclictest26127-21tail19:44:151
1682699371cyclictest13491-21sed23:19:051
121750370irq/30-eth0_g0_1219-21kworker/1:222:07:441
121750370irq/30-eth0_g0_1219-21kworker/1:221:15:411
121750370irq/30-eth0_g0_1219-21kworker/1:200:19:111
121650370irq/29-eth0_g0_4521-21grep20:29:120
121650370irq/29-eth0_g0_26124-21unixbench_multi19:44:150
121650370irq/29-eth0_g0_1964-21runrttasks20:28:140
121650370irq/29-eth0_g0_1964-21runrttasks20:28:140
121650370irq/29-eth0_g0_1964-21runrttasks20:03:120
121650370irq/29-eth0_g0_13-21kworker/0:100:03:180
121650370irq/29-eth0_g0_0-21swapper/019:24:070
121370ksoftirqd/1121750irq/30-eth0_g0_00:34:131
1682699362cyclictest815-21seq20:14:141
1682699362cyclictest815-21seq20:14:141
1682699361cyclictest13853-21diskmemload21:09:101
121750360irq/30-eth0_g0_2313-21sed20:19:161
121750360irq/30-eth0_g0_2313-21sed20:19:161
121650360irq/29-eth0_g0_13084-21netstat21:04:110
121360ksoftirqd/124657-21ntpdc19:39:111
121360ksoftirqd/1121650irq/29-eth0_g0_19:04:121
1682699351cyclictest294722sleep119:59:091
1682699351cyclictest26946-21/usr/sbin/munin19:49:071
1682699351cyclictest0-21swapper/120:08:041
121650350irq/29-eth0_g0_28630-21unixbench_singl19:54:150
121650350irq/29-eth0_g0_26996-21latency19:49:080
121650350irq/29-eth0_g0_1964-21runrttasks20:23:160
121650350irq/29-eth0_g0_1964-21runrttasks20:23:160
121650350irq/29-eth0_g0_1964-21runrttasks19:16:580
121650350irq/29-eth0_g0_11884-21ntpq20:59:120
121650350irq/29-eth0_g0_0-21swapper/019:39:120
1682699341cyclictest21240-21sed19:24:161
121650340irq/29-eth0_g0_31080-21grep20:04:230
121650340irq/29-eth0_g0_22140-21cat19:29:100
121650340irq/29-eth0_g0_22140-21cat19:29:100
121650340irq/29-eth0_g0_16988-21df_abs19:09:050
121650340irq/29-eth0_g0_1682599cyclictest20:16:130
121650340irq/29-eth0_g0_1682599cyclictest20:16:130
121340ksoftirqd/1121750irq/30-eth0_g0_20:37:070
1682699331cyclictest0-21swapper/120:59:121
121650330irq/29-eth0_g0_1682699cyclictest20:43:541
121750320irq/30-eth0_g0_5565-21/usr/sbin/munin20:34:081
121750320irq/30-eth0_g0_20067-21unixbench_singl19:19:241
121650320irq/29-eth0_g0_0-21swapper/019:34:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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