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2026-06-26 - 10:41

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 50 highest latencies:
System rack3slot5s.osadl.org (updated Fri Jun 26, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
323432950sleep0121650irq/29-eth0_g0_23:15:050
121900ksoftirqd/1121750irq/30-eth0_g0_19:58:421
121740ksoftirqd/1121750irq/30-eth0_g0_00:25:431
121660ksoftirqd/1121750irq/30-eth0_g0_22:31:350
69122590sleep1121750irq/30-eth0_g0_23:43:591
121510ksoftirqd/1310912sleep023:09:440
121510ksoftirqd/1121750irq/30-eth0_g0_21:10:261
168772500sleep1121650irq/29-eth0_g0_22:13:511
145392460chrt121750irq/30-eth0_g0_00:14:070
121460ksoftirqd/1121750irq/30-eth0_g0_23:29:301
121460ksoftirqd/1121750irq/30-eth0_g0_22:44:311
190912440chrt121750irq/30-eth0_g0_22:22:421
121650440irq/29-eth0_g0_1964-21runrttasks19:08:390
121440ksoftirqd/1121650irq/29-eth0_g0_22:38:391
121440ksoftirqd/1121650irq/29-eth0_g0_22:38:391
310082430sleep031012-21df_abs20:58:510
121750430irq/30-eth0_g0_18233-21chrt00:29:301
121750430irq/30-eth0_g0_1219-21kworker/1:222:05:271
121650430irq/29-eth0_g0_31ksoftirqd/021:28:340
121650430irq/29-eth0_g0_2093-21snmpd21:08:510
121430ksoftirqd/1121650irq/29-eth0_g0_23:57:291
78692420sleep0121650irq/29-eth0_g0_21:35:070
121750420irq/30-eth0_g0_1219-21kworker/1:222:13:271
121650420irq/29-eth0_g0_121ksoftirqd/121:31:050
121420ksoftirqd/1121650irq/29-eth0_g0_23:33:511
393599411cyclictest783-21diskmemload23:38:551
121750410irq/30-eth0_g0_1219-21kworker/1:223:22:571
121750410irq/30-eth0_g0_1219-21kworker/1:221:59:381
121750410irq/30-eth0_g0_121ksoftirqd/122:54:151
121650410irq/29-eth0_g0_31ksoftirqd/023:42:180
121650410irq/29-eth0_g0_31ksoftirqd/021:21:030
121650410irq/29-eth0_g0_13-21kworker/0:123:48:500
121650410irq/29-eth0_g0_0-21swapper/020:58:390
121410ksoftirqd/1121750irq/30-eth0_g0_23:32:340
121410ksoftirqd/1121750irq/30-eth0_g0_21:44:260
121410ksoftirqd/1121650irq/29-eth0_g0_22:51:171
121410ksoftirqd/1121650irq/29-eth0_g0_21:40:171
393599405cyclictest0-21swapper/119:28:581
393599401cyclictest783-21diskmemload22:23:561
393599401cyclictest19224-21sendmail_mailqu20:08:591
121750400irq/30-eth0_g0_1219-21kworker/1:223:04:071
121750400irq/30-eth0_g0_121ksoftirqd/121:54:371
121650400irq/29-eth0_g0_31ksoftirqd/022:14:020
121650400irq/29-eth0_g0_225232sleep022:34:520
121650400irq/29-eth0_g0_225232sleep022:34:520
121650400irq/29-eth0_g0_13-21kworker/0:123:54:220
121650400irq/29-eth0_g0_13-21kworker/0:122:51:530
121650400irq/29-eth0_g0_13-21kworker/0:122:26:370
121650400irq/29-eth0_g0_13-21kworker/0:122:12:210
121650400irq/29-eth0_g0_13-21kworker/0:100:23:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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