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2026-08-28 - 17:01

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 Fri Aug 28, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2125921390sleep0121650irq/29-eth0_g0_09:28:500
121950ksoftirqd/1121750irq/30-eth0_g0_09:08:160
121910ksoftirqd/1121750irq/30-eth0_g0_10:07:580
173862840sleep0121750irq/30-eth0_g0_09:11:370
121740ksoftirqd/1121750irq/30-eth0_g0_10:57:180
231752580sleep1121750irq/30-eth0_g0_11:48:341
121580ksoftirqd/1121750irq/30-eth0_g0_11:11:201
121540ksoftirqd/1121750irq/30-eth0_g0_12:33:311
121540ksoftirqd/1121750irq/30-eth0_g0_11:24:111
1828299502cyclictest6948-21unixbench_multi10:41:281
121500ksoftirqd/1121650irq/29-eth0_g0_09:12:501
18282994917cyclictest15712-21runrttasks11:17:221
1828299491cyclictest9433-21unixbench_singl10:51:271
1828299491cyclictest1968-21df_abs08:11:181
1828299491cyclictest18311-21latency_hist07:06:081
1828299491cyclictest17675-21cat11:26:221
1828299491cyclictest17675-21cat11:26:221
121750490irq/30-eth0_g0_1828299cyclictest09:57:011
121650490irq/29-eth0_g0_18314-21latency_hist07:06:080
121490ksoftirqd/1121750irq/30-eth0_g0_12:06:220
1828299482cyclictest5707-21unixbench_multi10:36:281
18282994817cyclictest12549-21df_abs11:06:181
1828299481cyclictest317372sleep110:11:251
1828299481cyclictest21088-21cpu11:41:151
1828299481cyclictest201912sleep111:36:231
1828299481cyclictest15319-21diskmemload12:11:291
121750480irq/30-eth0_g0_121ksoftirqd/109:17:401
121480ksoftirqd/1121750irq/30-eth0_g0_10:48:301
121480ksoftirqd/1121650irq/29-eth0_g0_12:16:190
252352470sleep0121750irq/30-eth0_g0_11:56:260
1828299473cyclictest22435-21taskset07:21:231
18282994723cyclictest0-21swapper/109:32:571
1828299471cyclictest15319-21diskmemload10:01:221
121750470irq/30-eth0_g0_1828299cyclictest11:57:561
121750470irq/30-eth0_g0_121ksoftirqd/107:26:131
121470ksoftirqd/1121650irq/29-eth0_g0_09:16:270
18282994625cyclictest431-21missed_timers10:16:221
1828299462cyclictest25926-21unixbench_singl09:46:281
1828299461cyclictest15319-21diskmemload09:41:281
121750460irq/30-eth0_g0_121ksoftirqd/112:10:241
121750460irq/30-eth0_g0_121ksoftirqd/108:56:261
121750460irq/30-eth0_g0_121ksoftirqd/108:20:501
1828299452cyclictest15351-21latency_hist09:06:071
1828299452cyclictest11183-21unixbench_singl08:46:291
121750450irq/30-eth0_g0_1828299cyclictest07:36:261
121650450irq/29-eth0_g0_1828299cyclictest11:54:211
18282994415cyclictest4751-21seq08:21:251
1828299441cyclictest27664-21unixbench_singl07:41:291
1828299441cyclictest19559-21proc_pri09:21:251
1828299441cyclictest0-21swapper/111:01:071
121750440irq/30-eth0_g0_27086-21unixbench_multi09:51:281
121750440irq/30-eth0_g0_1828299cyclictest10:30:351
121750440irq/30-eth0_g0_1828299cyclictest09:09:591
121750440irq/30-eth0_g0_1219-21kworker/1:211:01:181
121750440irq/30-eth0_g0_121ksoftirqd/112:16:541
121440ksoftirqd/1121750irq/30-eth0_g0_10:11:420
18282994318cyclictest23000-21taskset09:36:191
18282994318cyclictest23000-21taskset09:36:191
1828299431cyclictest20977-21unixbench_multi09:26:261
1828299431cyclictest0-21swapper/108:36:211
121750430irq/30-eth0_g0_1828299cyclictest12:28:001
121750430irq/30-eth0_g0_1828299cyclictest10:21:441
121750430irq/30-eth0_g0_121ksoftirqd/107:56:251
121650430irq/29-eth0_g0_21835-21memory09:31:190
121430ksoftirqd/1121750irq/30-eth0_g0_11:14:020
121430ksoftirqd/1121750irq/30-eth0_g0_07:41:220
1828299421cyclictest0-21swapper/112:21:241
1828299421cyclictest0-21swapper/108:53:281
121750420irq/30-eth0_g0_121ksoftirqd/112:03:171
121750420irq/30-eth0_g0_121ksoftirqd/111:32:151
121750420irq/30-eth0_g0_121ksoftirqd/107:06:201
121750420irq/30-eth0_g0_0-21swapper/107:50:301
121650420irq/29-eth0_g0_13-21kworker/0:112:33:460
121650420irq/29-eth0_g0_13-21kworker/0:111:46:070
121420ksoftirqd/1117450irq/72-mmc008:01:561
18282994115cyclictest25123-21/usr/sbin/munin07:31:281
18282994113cyclictest7910-21runrttasks08:35:371
1828299411cyclictest0-21swapper/108:46:061
1828299402cyclictest29570-21df_inode07:51:181
18282994019cyclictest21425-21timerandwakeup07:16:281
18282994019cyclictest121750irq/30-eth0_g0_10:31:171
18282994019cyclictest121750irq/30-eth0_g0_10:31:171
18282994019cyclictest1176-21ps08:06:261
1828299401cyclictest0-21swapper/110:08:161
1828299401cyclictest0-21swapper/108:26:271
121650400irq/29-eth0_g0_13-21kworker/0:110:39:410
121650400irq/29-eth0_g0_13-21kworker/0:109:51:130
121750390irq/30-eth0_g0_9951-21unixbench_singl08:41:290
121650390irq/29-eth0_g0_6947-21unixbench_multi10:41:280
121650390irq/29-eth0_g0_14965-21df11:16:170
121650390irq/29-eth0_g0_13-21kworker/0:112:26:280
121650390irq/29-eth0_g0_13-21kworker/0:112:13:150
121650390irq/29-eth0_g0_13-21kworker/0:112:01:070
121650390irq/29-eth0_g0_13-21kworker/0:111:48:110
121650390irq/29-eth0_g0_13-21kworker/0:111:03:170
121390ksoftirqd/1297712sleep010:02:550
242542380sleep0121750irq/30-eth0_g0_11:51:500
121650380irq/29-eth0_g0_1964-21runrttasks08:01:070
121650380irq/29-eth0_g0_1828199cyclictest10:26:170
121650380irq/29-eth0_g0_1828199cyclictest09:48:490
121650380irq/29-eth0_g0_13-21kworker/0:110:55:100
121650380irq/29-eth0_g0_13-21kworker/0:109:43:160
1828299371cyclictest0-21swapper/107:11:301
1828299371cyclictest0-21swapper/107:11:301
121750370irq/30-eth0_g0_1964-21runrttasks11:07:380
121750370irq/30-eth0_g0_1350-21grep08:06:280
121650370irq/29-eth0_g0_7451-21chrt08:31:280
121650370irq/29-eth0_g0_4300-21latency_hist08:21:080
121650370irq/29-eth0_g0_19481-21ntpdc09:21:230
121650370irq/29-eth0_g0_13-21kworker/0:110:31:210
121650370irq/29-eth0_g0_13-21kworker/0:110:31:210
121650370irq/29-eth0_g0_0-21swapper/011:26:390
121650370irq/29-eth0_g0_0-21swapper/011:26:390
121650360irq/29-eth0_g0_23373-21timerandwakeup09:36:270
121650360irq/29-eth0_g0_23373-21timerandwakeup09:36:270
121650360irq/29-eth0_g0_20290-21grep07:11:290
121650360irq/29-eth0_g0_20290-21grep07:11:290
121650360irq/29-eth0_g0_1964-21runrttasks12:23:410
121650360irq/29-eth0_g0_1964-21runrttasks07:32:260
121650360irq/29-eth0_g0_1964-21runrttasks07:23:590
121650360irq/29-eth0_g0_14313-21df_abs09:01:180
121650360irq/29-eth0_g0_13-21kworker/0:111:21:360
121650360irq/29-eth0_g0_0-21swapper/009:57:380
121360ksoftirqd/1121750irq/30-eth0_g0_10:25:050
121750350irq/30-eth0_g0_20178-21netstat11:36:220
121650350irq/29-eth0_g0_1964-21runrttasks09:00:270
121650350irq/29-eth0_g0_1964-21runrttasks08:27:460
121650350irq/29-eth0_g0_1964-21runrttasks07:20:240
121650350irq/29-eth0_g0_12050-21sort08:51:220
121650350irq/29-eth0_g0_0-21swapper/010:17:190
121750340irq/30-eth0_g0_284292sleep007:46:200
121650340irq/29-eth0_g0_13-21kworker/0:111:32:090
121650340irq/29-eth0_g0_11182-21unixbench_singl08:46:290
121650330irq/29-eth0_g0_0-21swapper/010:46:240
121650330irq/29-eth0_g0_0-21swapper/007:51:180
121650330irq/29-eth0_g0_0-21swapper/007:41:070
121750320irq/30-eth0_g0_23805-21/usr/sbin/munin07:26:260
121750320irq/30-eth0_g0_1964-21runrttasks08:13:480
121650320irq/29-eth0_g0_1964-21runrttasks08:37:450
121650320irq/29-eth0_g0_1964-21runrttasks08:23:310
121650320irq/29-eth0_g0_0-21swapper/008:01:250
121650300irq/29-eth0_g0_19507-21latency_hist07:11:070
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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