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2026-04-22 - 09:51

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 Apr 22, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
148521120sleep1121550irq/30-eth0_g0_00:11:451
1211120ksoftirqd/1121550irq/30-eth0_g0_23:41:541
338521000sleep0121450irq/29-eth0_g0_00:29:560
121920ksoftirqd/1121450irq/29-eth0_g0_23:56:400
121710ksoftirqd/1150002sleep021:05:350
203822590sleep0121550irq/30-eth0_g0_21:59:010
121510ksoftirqd/1121550irq/30-eth0_g0_20:24:460
6952500sleep1121450irq/29-eth0_g0_00:04:391
121500ksoftirqd/1121450irq/29-eth0_g0_22:03:370
272012490sleep0121450irq/29-eth0_g0_23:05:330
121460ksoftirqd/1121550irq/30-eth0_g0_23:19:421
121460ksoftirqd/1121450irq/29-eth0_g0_23:58:421
279632450sleep0121450irq/29-eth0_g0_23:13:300
121450ksoftirqd/1121550irq/30-eth0_g0_00:26:071
121450ksoftirqd/1121550irq/30-eth0_g0_00:26:071
121450440irq/29-eth0_g0_121ksoftirqd/123:23:101
121440ksoftirqd/1121550irq/30-eth0_g0_21:17:541
121550430irq/30-eth0_g0_1221-21kworker/1:222:45:031
121550430irq/30-eth0_g0_1221-21kworker/1:221:14:051
121550430irq/30-eth0_g0_1221-21kworker/1:200:17:511
121450430irq/29-eth0_g0_1911-21runrttasks23:25:100
121450430irq/29-eth0_g0_1911-21runrttasks23:25:100
121450430irq/29-eth0_g0_121ksoftirqd/100:39:020
121430ksoftirqd/1121550irq/30-eth0_g0_23:48:501
121430ksoftirqd/1121450irq/29-eth0_g0_22:26:570
121430ksoftirqd/1121450irq/29-eth0_g0_20:44:471
121550420irq/30-eth0_g0_121ksoftirqd/121:37:281
121450420irq/29-eth0_g0_1911-21runrttasks20:39:080
121420ksoftirqd/1121450irq/29-eth0_g0_22:30:111
198842410sleep1121450irq/29-eth0_g0_21:54:091
121550410irq/30-eth0_g0_40802sleep100:37:051
121550410irq/30-eth0_g0_256712sleep122:50:321
121550410irq/30-eth0_g0_121ksoftirqd/121:56:261
121450410irq/29-eth0_g0_31ksoftirqd/023:40:060
121450410irq/29-eth0_g0_13-21kworker/0:122:09:160
121410ksoftirqd/1121550irq/30-eth0_g0_22:55:440
121410ksoftirqd/1121550irq/30-eth0_g0_21:19:440
121550400irq/30-eth0_g0_321342sleep123:54:421
121550400irq/30-eth0_g0_1221-21kworker/1:222:57:541
121550400irq/30-eth0_g0_1221-21kworker/1:200:05:011
121550400irq/30-eth0_g0_121ksoftirqd/123:27:181
121550400irq/30-eth0_g0_121ksoftirqd/123:27:181
121550400irq/30-eth0_g0_121ksoftirqd/121:32:571
121450400irq/29-eth0_g0_1911-21runrttasks00:17:090
121450400irq/29-eth0_g0_13-21kworker/0:123:36:170
121450400irq/29-eth0_g0_13-21kworker/0:121:50:230
121400ksoftirqd/1121550irq/30-eth0_g0_19:40:040
121400ksoftirqd/1121550irq/30-eth0_g0_00:03:560
121400ksoftirqd/1121450irq/29-eth0_g0_22:39:030
314199391cyclictest4215-21cat19:19:471
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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