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2025-09-17 - 22:33

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 Sep 17, 2025 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121550ksoftirqd/1399050irq/30-eth0_g0_12:00:311
121550ksoftirqd/1399050irq/30-eth0_g0_12:00:311
121540ksoftirqd/1399050irq/30-eth0_g0_11:42:021
121490ksoftirqd/1399050irq/30-eth0_g0_11:13:101
121490ksoftirqd/1399050irq/30-eth0_g0_11:13:101
121480ksoftirqd/1399050irq/30-eth0_g0_12:25:121
121470ksoftirqd/1399050irq/30-eth0_g0_11:53:481
399050450irq/30-eth0_g0_5128-21irqstats10:20:181
121440ksoftirqd/1399050irq/30-eth0_g0_11:30:391
399050420irq/30-eth0_g0_470-21kworker/1:111:57:591
399050420irq/30-eth0_g0_470-21kworker/1:111:57:591
399050420irq/30-eth0_g0_470-21kworker/1:111:06:001
399050420irq/30-eth0_g0_470-21kworker/1:109:21:011
399050420irq/30-eth0_g0_470-21kworker/1:109:18:021
399050420irq/30-eth0_g0_470-21kworker/1:109:10:231
398950420irq/29-eth0_g0_5570-21unixbench_multi07:00:260
121420ksoftirqd/1399050irq/30-eth0_g0_10:32:331
121420ksoftirqd/1398950irq/29-eth0_g0_12:05:371
121420ksoftirqd/1398950irq/29-eth0_g0_11:50:120
399050410irq/30-eth0_g0_470-21kworker/1:110:07:381
398950410irq/29-eth0_g0_31ksoftirqd/010:20:200
398950410irq/29-eth0_g0_22885-21kworker/0:211:55:190
398950410irq/29-eth0_g0_22885-21kworker/0:211:55:190
398950410irq/29-eth0_g0_10472-21vmstat10:50:390
121410ksoftirqd/1398950irq/29-eth0_g0_10:00:261
399050400irq/30-eth0_g0_470-21kworker/1:112:11:201
399050400irq/30-eth0_g0_470-21kworker/1:109:26:091
399050400irq/30-eth0_g0_31ksoftirqd/009:33:120
398950400irq/29-eth0_g0_31ksoftirqd/011:50:000
398950400irq/29-eth0_g0_31ksoftirqd/011:41:550
398950400irq/29-eth0_g0_22885-21kworker/0:212:20:160
398950400irq/29-eth0_g0_22885-21kworker/0:210:45:260
398950400irq/29-eth0_g0_22885-21kworker/0:209:53:390
398950400irq/29-eth0_g0_22885-21kworker/0:209:40:190
398950400irq/29-eth0_g0_11868-21proc_pri07:40:240
398950400irq/29-eth0_g0_11868-21proc_pri07:40:240
398950400irq/29-eth0_g0_1043-21iostat09:55:180
121400ksoftirqd/1399050irq/30-eth0_g0_11:35:420
121400ksoftirqd/1399050irq/30-eth0_g0_10:59:570
121400ksoftirqd/1398950irq/29-eth0_g0_10:08:160
568199391cyclictest3956-21grep10:10:281
399050390irq/30-eth0_g0_470-21kworker/1:110:59:541
399050390irq/30-eth0_g0_31ksoftirqd/012:07:240
399050390irq/30-eth0_g0_121ksoftirqd/110:28:470
399050390irq/30-eth0_g0_121ksoftirqd/110:27:481
398950390irq/29-eth0_g0_25798-21unixbench_singl12:25:280
398950390irq/29-eth0_g0_22885-21kworker/0:212:17:550
398950390irq/29-eth0_g0_22885-21kworker/0:211:30:470
398950390irq/29-eth0_g0_22885-21kworker/0:210:38:180
121390ksoftirqd/1399050irq/30-eth0_g0_11:11:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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