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2026-05-22 - 16:32

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 Fri May 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
430521500sleep1121450irq/29-eth0_g0_23:11:261
863921100sleep0121550irq/30-eth0_g0_23:53:570
121840ksoftirqd/1121550irq/30-eth0_g0_23:26:211
121670ksoftirqd/1121550irq/30-eth0_g0_23:16:001
290592560sleep1121450irq/29-eth0_g0_21:55:341
267942560sleep1121550irq/30-eth0_g0_21:33:371
121480ksoftirqd/1121550irq/30-eth0_g0_22:15:411
17422460sleep0121450irq/29-eth0_g0_22:46:130
121460ksoftirqd/1121550irq/30-eth0_g0_00:36:081
121550450irq/30-eth0_g0_1221-21kworker/1:222:20:481
121450ksoftirqd/1121550irq/30-eth0_g0_22:30:441
121450ksoftirqd/1121550irq/30-eth0_g0_22:05:471
121550440irq/30-eth0_g0_1221-21kworker/1:223:53:511
121550440irq/30-eth0_g0_1221-21kworker/1:221:41:071
121450440irq/29-eth0_g0_12162-21cyclictest19:08:370
121440ksoftirqd/1121450irq/29-eth0_g0_22:46:541
121430ksoftirqd/1121450irq/29-eth0_g0_23:42:031
322282420sleep1121450irq/29-eth0_g0_22:27:091
121550420irq/30-eth0_g0_1221-21kworker/1:223:32:571
121550420irq/30-eth0_g0_1221-21kworker/1:222:03:281
121550420irq/30-eth0_g0_1221-21kworker/1:222:03:281
121550420irq/30-eth0_g0_1221-21kworker/1:221:25:571
121550420irq/30-eth0_g0_121ksoftirqd/123:59:161
121450420irq/29-eth0_g0_121ksoftirqd/122:52:250
121420ksoftirqd/1121550irq/30-eth0_g0_00:17:070
121420ksoftirqd/1121550irq/30-eth0_g0_00:17:070
121450410irq/29-eth0_g0_31ksoftirqd/022:12:190
121450410irq/29-eth0_g0_1911-21runrttasks21:55:480
121450410irq/29-eth0_g0_1911-21runrttasks21:46:220
121410ksoftirqd/1121550irq/30-eth0_g0_21:35:381
121410ksoftirqd/1121550irq/30-eth0_g0_21:35:381
45002400sleep0121450irq/29-eth0_g0_23:13:380
121550400irq/30-eth0_g0_31ksoftirqd/023:01:030
121550400irq/30-eth0_g0_1221-21kworker/1:222:52:291
121550400irq/30-eth0_g0_1221-21kworker/1:200:13:121
121450400irq/29-eth0_g0_31ksoftirqd/023:16:270
121450400irq/29-eth0_g0_13-21kworker/0:121:36:160
121450400irq/29-eth0_g0_13-21kworker/0:121:36:160
121450400irq/29-eth0_g0_13-21kworker/0:121:20:510
121450400irq/29-eth0_g0_13-21kworker/0:100:22:370
121450400irq/29-eth0_g0_121ksoftirqd/123:38:410
121400ksoftirqd/1121550irq/30-eth0_g0_20:43:330
121550390irq/30-eth0_g0_7623-21taskset23:43:531
121550390irq/30-eth0_g0_7623-21taskset23:43:531
121550390irq/30-eth0_g0_31ksoftirqd/022:20:420
121550390irq/30-eth0_g0_1221-21kworker/1:221:45:351
121450390irq/29-eth0_g0_1911-21runrttasks19:03:571
121450390irq/29-eth0_g0_13-21kworker/0:121:18:100
121450390irq/29-eth0_g0_13-21kworker/0:100:35:180
121390ksoftirqd/1121550irq/30-eth0_g0_23:46:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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