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2026-08-20 - 00:28

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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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 50 highest latencies:
System rack3slot5s.osadl.org (updated Wed Aug 19, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1743221130sleep1121750irq/30-eth0_g0_12:35:331
1211080ksoftirqd/1121650irq/29-eth0_g0_07:06:451
1211050ksoftirqd/1121750irq/30-eth0_g0_11:16:270
326772940sleep0121750irq/30-eth0_g0_11:24:450
95292830sleep0121650irq/29-eth0_g0_09:50:490
21132610sleep1121750irq/30-eth0_g0_11:31:471
37472600sleep0121650irq/29-eth0_g0_11:37:370
192502520sleep1121650irq/29-eth0_g0_10:30:141
98862510sleep0121650irq/29-eth0_g0_12:03:040
121500ksoftirqd/1121750irq/30-eth0_g0_12:23:301
121480ksoftirqd/1121750irq/30-eth0_g0_11:29:541
121480ksoftirqd/1121750irq/30-eth0_g0_10:37:501
121470ksoftirqd/1121750irq/30-eth0_g0_11:14:361
121470ksoftirqd/1121750irq/30-eth0_g0_10:25:411
121470ksoftirqd/1121750irq/30-eth0_g0_09:55:481
121470ksoftirqd/1121750irq/30-eth0_g0_09:55:481
121470ksoftirqd/1121650irq/29-eth0_g0_10:40:150
73562460chrt121750irq/30-eth0_g0_11:51:560
121460ksoftirqd/1121750irq/30-eth0_g0_11:20:541
121460ksoftirqd/1121750irq/30-eth0_g0_09:06:401
121650450irq/29-eth0_g0_636-21df_abs07:01:400
121650450irq/29-eth0_g0_13-21kworker/0:109:26:420
121650450irq/29-eth0_g0_13-21kworker/0:109:26:420
121450ksoftirqd/1121750irq/30-eth0_g0_12:30:561
121450ksoftirqd/1121750irq/30-eth0_g0_10:16:241
121450ksoftirqd/1121750irq/30-eth0_g0_09:42:421
121450ksoftirqd/1121650irq/29-eth0_g0_07:18:011
121650440irq/29-eth0_g0_1964-21runrttasks11:44:350
121440ksoftirqd/1121750irq/30-eth0_g0_12:33:520
121440ksoftirqd/1121650irq/29-eth0_g0_12:07:061
121440ksoftirqd/1121650irq/29-eth0_g0_07:26:431
204872430sleep0121750irq/30-eth0_g0_10:35:220
136972430sleep0121650irq/29-eth0_g0_12:19:460
121430ksoftirqd/1121750irq/30-eth0_g0_08:35:270
121430ksoftirqd/1121650irq/29-eth0_g0_10:00:461
121420ksoftirqd/1121750irq/30-eth0_g0_10:47:191
121420ksoftirqd/1121650irq/29-eth0_g0_12:26:520
121420ksoftirqd/1121650irq/29-eth0_g0_12:21:271
121420ksoftirqd/1121650irq/29-eth0_g0_11:41:441
121750410irq/30-eth0_g0_1219-21kworker/1:210:32:191
121650410irq/29-eth0_g0_1964-21runrttasks09:10:460
121650410irq/29-eth0_g0_18033-21ntp_offset08:11:460
121410ksoftirqd/1121650irq/29-eth0_g0_11:57:501
121750400irq/30-eth0_g0_1219-21kworker/1:211:04:391
121750400irq/30-eth0_g0_121ksoftirqd/109:46:411
121650400irq/29-eth0_g0_1964-21runrttasks09:14:300
121650400irq/29-eth0_g0_0-21swapper/011:02:430
121650400irq/29-eth0_g0_0-21swapper/010:11:450
82682390chrt121650irq/29-eth0_g0_09:45:230
121750390irq/30-eth0_g0_1219-21kworker/1:210:58:291
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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