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2025-11-19 - 00:14

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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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 Tue Nov 18, 2025 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1287721600sleep1121650irq/29-eth0_g0_10:20:011
1155621380sleep0121650irq/29-eth0_g0_10:14:490
1350121030sleep0121650irq/29-eth0_g0_12:35:020
121950ksoftirqd/1121650irq/29-eth0_g0_07:50:161
290152860sleep0121650irq/29-eth0_g0_09:11:350
121860ksoftirqd/1121650irq/29-eth0_g0_11:08:360
111162680chrt121750irq/30-eth0_g0_12:25:060
121550ksoftirqd/1121750irq/30-eth0_g0_10:58:491
121520ksoftirqd/1121750irq/30-eth0_g0_09:48:431
121510ksoftirqd/1121650irq/29-eth0_g0_11:48:480
121480ksoftirqd/1121750irq/30-eth0_g0_11:02:321
121470ksoftirqd/1121750irq/30-eth0_g0_11:33:371
260972460sleep0121750irq/30-eth0_g0_09:00:120
260972460sleep0121750irq/30-eth0_g0_09:00:120
121460ksoftirqd/1121750irq/30-eth0_g0_12:03:400
121440ksoftirqd/1121650irq/29-eth0_g0_10:03:031
121440ksoftirqd/1121650irq/29-eth0_g0_09:25:091
121750430irq/30-eth0_g0_1219-21kworker/1:211:14:351
121750430irq/30-eth0_g0_1219-21kworker/1:211:05:211
121750430irq/30-eth0_g0_1219-21kworker/1:210:47:221
121750430irq/30-eth0_g0_1219-21kworker/1:210:33:371
121750430irq/30-eth0_g0_1219-21kworker/1:209:16:351
121430ksoftirqd/1121750irq/30-eth0_g0_10:36:151
121430ksoftirqd/1121650irq/29-eth0_g0_11:36:231
3113099428cyclictest12986-21vmstat08:05:191
3113099428cyclictest12986-21vmstat08:05:191
3113099422cyclictest26248-21grep09:00:151
3113099422cyclictest26248-21grep09:00:151
121750420irq/30-eth0_g0_31126-21latencyplot07:09:541
121750420irq/30-eth0_g0_1219-21kworker/1:212:15:131
121750420irq/30-eth0_g0_1219-21kworker/1:212:15:131
121750420irq/30-eth0_g0_1219-21kworker/1:209:33:371
121650420irq/29-eth0_g0_30539-21sendmail_mailtr07:05:140
121650420irq/29-eth0_g0_1894-21runrttasks08:12:200
121650420irq/29-eth0_g0_17532-21netstat08:25:130
121650420irq/29-eth0_g0_13-21kworker/0:111:24:250
121650420irq/29-eth0_g0_121ksoftirqd/109:23:570
121420ksoftirqd/1121650irq/29-eth0_g0_11:55:280
121420ksoftirqd/1121650irq/29-eth0_g0_08:54:361
121750410irq/30-eth0_g0_1219-21kworker/1:209:21:311
121650410irq/29-eth0_g0_31ksoftirqd/012:17:450
121650410irq/29-eth0_g0_31ksoftirqd/012:17:450
121650410irq/29-eth0_g0_31ksoftirqd/009:41:220
121650410irq/29-eth0_g0_28077-21diskmemload09:47:220
121650410irq/29-eth0_g0_13-21kworker/0:111:13:140
121410ksoftirqd/1121750irq/30-eth0_g0_12:35:141
121410ksoftirqd/1121750irq/30-eth0_g0_10:20:030
121750400irq/30-eth0_g0_1219-21kworker/1:209:12:551
121750400irq/30-eth0_g0_121ksoftirqd/110:13:421
121750400irq/30-eth0_g0_121ksoftirqd/109:52:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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