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2026-07-05 - 20:14

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 Sun Jul 05, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211180ksoftirqd/1121750irq/30-eth0_g0_09:09:281
121910ksoftirqd/1121750irq/30-eth0_g0_07:48:501
121820ksoftirqd/1121650irq/29-eth0_g0_10:38:520
16952760sleep0121650irq/29-eth0_g0_09:13:230
75752690sleep0121650irq/29-eth0_g0_09:36:110
121640ksoftirqd/1121750irq/30-eth0_g0_12:18:070
121580ksoftirqd/1121650irq/29-eth0_g0_10:43:051
173372570sleep1121650irq/29-eth0_g0_10:15:461
121510ksoftirqd/1121750irq/30-eth0_g0_10:07:551
121510ksoftirqd/1121750irq/30-eth0_g0_10:07:551
121510ksoftirqd/1121750irq/30-eth0_g0_09:39:261
121510ksoftirqd/1121750irq/30-eth0_g0_09:31:501
121490ksoftirqd/1121650irq/29-eth0_g0_11:43:310
121650480irq/29-eth0_g0_31ksoftirqd/007:43:370
121470ksoftirqd/1121750irq/30-eth0_g0_11:58:161
121460ksoftirqd/1121750irq/30-eth0_g0_11:35:181
121460ksoftirqd/1121750irq/30-eth0_g0_11:15:131
27712440sleep1121750irq/30-eth0_g0_09:17:241
211402440sleep1121650irq/29-eth0_g0_10:32:181
121750430irq/30-eth0_g0_31ksoftirqd/009:53:310
121430ksoftirqd/1121750irq/30-eth0_g0_12:25:261
121750420irq/30-eth0_g0_1219-21kworker/1:212:33:261
121650420irq/29-eth0_g0_478-21timerandwakeup11:18:380
121650420irq/29-eth0_g0_1964-21runrttasks08:22:330
121650420irq/29-eth0_g0_121ksoftirqd/111:08:380
121750410irq/30-eth0_g0_31ksoftirqd/009:48:390
121750410irq/30-eth0_g0_1219-21kworker/1:212:14:141
121750410irq/30-eth0_g0_1219-21kworker/1:209:28:151
121650410irq/29-eth0_g0_31ksoftirqd/012:22:440
121650410irq/29-eth0_g0_31ksoftirqd/010:54:130
121650410irq/29-eth0_g0_31ksoftirqd/009:21:020
121650410irq/29-eth0_g0_161532chrt12:23:320
121650410irq/29-eth0_g0_13-21kworker/0:112:04:560
339799401cyclictest0-21swapper/110:55:001
121750400irq/30-eth0_g0_7434-21taskset09:34:321
121750400irq/30-eth0_g0_1219-21kworker/1:211:45:451
121750400irq/30-eth0_g0_1219-21kworker/1:211:32:201
121750400irq/30-eth0_g0_121ksoftirqd/111:04:591
121650400irq/29-eth0_g0_339699cyclictest10:59:020
121650400irq/29-eth0_g0_339699cyclictest10:59:020
121650400irq/29-eth0_g0_31ksoftirqd/012:12:200
121650400irq/29-eth0_g0_13-21kworker/0:109:58:190
121650400irq/29-eth0_g0_13-21kworker/0:109:44:280
121650400irq/29-eth0_g0_0-21swapper/008:43:320
121400ksoftirqd/1121650irq/29-eth0_g0_09:59:541
339799394cyclictest0-21swapper/107:28:171
339799392cyclictest15981-21irqstats07:58:311
339799391cyclictest14985-21grep07:53:341
121750390irq/30-eth0_g0_15331-21unixbench_singl12:18:361
121750390irq/30-eth0_g0_1219-21kworker/1:211:52:161
121750390irq/30-eth0_g0_1219-21kworker/1:211:10:011
121750390irq/30-eth0_g0_121ksoftirqd/112:00:111
121750390irq/30-eth0_g0_0-21swapper/110:35:551
121750390irq/30-eth0_g0_0-21swapper/110:20:161
121650390irq/29-eth0_g0_9789-21df11:58:270
121650390irq/29-eth0_g0_6495-21sendmail_mailtr07:18:370
121650390irq/29-eth0_g0_339699cyclictest12:28:450
121650390irq/29-eth0_g0_339699cyclictest12:28:450
121650390irq/29-eth0_g0_2910-21unixbench_multi07:03:370
121650390irq/29-eth0_g0_2910-21unixbench_multi07:03:370
121650390irq/29-eth0_g0_18788-21sort10:23:170
121650390irq/29-eth0_g0_13-21kworker/0:110:30:050
121650390irq/29-eth0_g0_13-21kworker/0:109:23:360
121650390irq/29-eth0_g0_121ksoftirqd/110:23:520
121650390irq/29-eth0_g0_121ksoftirqd/110:13:300
121390ksoftirqd/1121650irq/29-eth0_g0_10:11:341
339799382cyclictest1964-21runrttasks11:23:541
339799381cyclictest424-21wc11:18:371
339799381cyclictest12072-21awk09:53:371
247012380sleep0121750irq/30-eth0_g0_10:45:560
121750380irq/30-eth0_g0_3389-21sh07:08:171
121750380irq/30-eth0_g0_3389-21sh07:08:171
121750380irq/30-eth0_g0_1219-21kworker/1:212:11:451
121750380irq/30-eth0_g0_1219-21kworker/1:210:27:141
121750380irq/30-eth0_g0_0-21swapper/109:45:571
121650380irq/29-eth0_g0_4232-21unixbench_multi11:33:390
121650380irq/29-eth0_g0_347-21diskmemload12:29:481
121650380irq/29-eth0_g0_347-21diskmemload12:29:481
121650380irq/29-eth0_g0_339699cyclictest09:30:470
121650380irq/29-eth0_g0_18889-21unixbench_singl08:08:380
121650380irq/29-eth0_g0_13-21kworker/0:111:56:430
121650380irq/29-eth0_g0_13-21kworker/0:111:48:180
121650380irq/29-eth0_g0_13-21kworker/0:111:16:010
121650380irq/29-eth0_g0_121ksoftirqd/111:30:120
121650380irq/29-eth0_g0_121ksoftirqd/110:04:230
121650380irq/29-eth0_g0_121ksoftirqd/110:04:230
121650380irq/29-eth0_g0_121ksoftirqd/109:22:131
121380ksoftirqd/1121650irq/29-eth0_g0_10:58:291
121380ksoftirqd/1121650irq/29-eth0_g0_10:58:291
121380ksoftirqd/1121650irq/29-eth0_g0_09:40:170
339799373cyclictest0-21swapper/108:18:361
339799372cyclictest31041-21sort08:58:381
339799371cyclictest23096-21/usr/sbin/munin08:28:341
296262370sleep0121650irq/29-eth0_g0_08:53:330
121750370irq/30-eth0_g0_1219-21kworker/1:212:03:211
121650370irq/29-eth0_g0_7433-21ls07:23:310
121650370irq/29-eth0_g0_5903-21latency_hist07:18:170
121650370irq/29-eth0_g0_5229-21ntp_states11:38:330
121650370irq/29-eth0_g0_4197-21sed07:08:380
121650370irq/29-eth0_g0_30453-21/usr/sbin/munin08:58:280
121650370irq/29-eth0_g0_13-21kworker/0:111:03:220
121650370irq/29-eth0_g0_13-21kworker/0:109:10:450
121650370irq/29-eth0_g0_10978-21grep07:38:290
339799362cyclictest17604-21grep08:03:361
339799362cyclictest12155-21df_abs07:43:281
339799361cyclictest3814-21sort07:08:321
339799361cyclictest25315-21missed_timers10:48:331
339799361cyclictest10665-21netstat09:48:321
121750360irq/30-eth0_g0_9031-21grep07:28:381
121750360irq/30-eth0_g0_25989-21awk08:38:351
121750360irq/30-eth0_g0_1219-21kworker/1:211:38:541
121650360irq/29-eth0_g0_8768-21ntp_kernel_err07:28:330
121650360irq/29-eth0_g0_31ksoftirqd/010:52:060
121650360irq/29-eth0_g0_26106-21sendmail_mailtr08:38:370
121650360irq/29-eth0_g0_1964-21runrttasks08:51:470
121650360irq/29-eth0_g0_1964-21runrttasks08:29:280
121650360irq/29-eth0_g0_1964-21runrttasks08:23:400
121650360irq/29-eth0_g0_1964-21runrttasks08:06:570
121650360irq/29-eth0_g0_1964-21runrttasks07:49:220
121650360irq/29-eth0_g0_15885-21unixbench_singl10:08:380
121650360irq/29-eth0_g0_13-21kworker/0:112:34:200
121650360irq/29-eth0_g0_13-21kworker/0:111:24:030
339799351cyclictest5422-21sed07:13:381
339799351cyclictest29145-21latency_hist08:53:161
339799351cyclictest10172-21awk07:33:381
121650350irq/29-eth0_g0_1964-21runrttasks08:17:420
121650350irq/29-eth0_g0_1964-21runrttasks07:57:550
121650350irq/29-eth0_g0_13-21kworker/0:110:34:280
121350ksoftirqd/1121650irq/29-eth0_g0_08:33:391
121350ksoftirqd/1121650irq/29-eth0_g0_08:33:391
339799342cyclictest22161-21memory08:23:301
339799341cyclictest296012chrt08:53:321
339799341cyclictest238332sleep110:43:281
339799341cyclictest11407-21/usr/sbin/munin07:38:381
121750340irq/30-eth0_g0_32362-21grep09:03:391
121750340irq/30-eth0_g0_32362-21grep09:03:391
121650340irq/29-eth0_g0_32214-21taskset09:03:370
121650340irq/29-eth0_g0_32214-21taskset09:03:370
121650340irq/29-eth0_g0_1964-21runrttasks08:36:140
121650340irq/29-eth0_g0_1964-21runrttasks08:36:140
121650340irq/29-eth0_g0_10246-21unixbench_multi07:33:390
339799331cyclictest19703-21/usr/sbin/munin08:13:301
339799331cyclictest18385-21taskset08:08:291
121650330irq/29-eth0_g0_339799cyclictest07:18:291
339799321cyclictest0-21swapper/108:48:161
121650320irq/29-eth0_g0_0-21swapper/007:58:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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