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2026-07-31 - 11:42

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 100 highest latencies:
System rack3slot5s.osadl.org (updated Fri Jul 31, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121700ksoftirqd/1121750irq/30-eth0_g0_19:22:331
183332690sleep1121750irq/30-eth0_g0_22:10:011
121580ksoftirqd/1123252sleep021:46:240
281632550sleep0121750irq/30-eth0_g0_22:50:150
268412550sleep1121750irq/30-eth0_g0_22:44:081
189552550sleep0121650irq/29-eth0_g0_00:24:250
121530ksoftirqd/1121750irq/30-eth0_g0_20:57:001
302532510chrt121750irq/30-eth0_g0_22:57:411
206522500sleep1121650irq/29-eth0_g0_22:18:281
206522500sleep1121650irq/29-eth0_g0_22:18:281
121490ksoftirqd/1121750irq/30-eth0_g0_22:53:311
121750470irq/30-eth0_g0_121ksoftirqd/100:32:301
121650470irq/29-eth0_g0_31ksoftirqd/022:52:270
121470ksoftirqd/1121650irq/29-eth0_g0_20:03:341
65892460sleep1121750irq/30-eth0_g0_23:33:011
121650460irq/29-eth0_g0_4532-21latency_hist23:27:150
121650460irq/29-eth0_g0_17456-21chrt22:07:260
121460ksoftirqd/1121750irq/30-eth0_g0_22:02:281
121460ksoftirqd/1121750irq/30-eth0_g0_00:17:221
121750450irq/30-eth0_g0_31ksoftirqd/022:42:390
121750440irq/30-eth0_g0_1219-21kworker/1:221:57:271
121750440irq/30-eth0_g0_1219-21kworker/1:221:15:231
121440ksoftirqd/14847-21/usr/sbin/munin19:02:311
121440ksoftirqd/1121750irq/30-eth0_g0_21:22:150
121440ksoftirqd/1121750irq/30-eth0_g0_19:17:280
154612430sleep1121650irq/29-eth0_g0_00:11:311
154612430sleep1121650irq/29-eth0_g0_00:11:311
121750430irq/30-eth0_g0_1219-21kworker/1:222:24:291
121650430irq/29-eth0_g0_13-21kworker/0:122:22:260
121430ksoftirqd/1121650irq/29-eth0_g0_19:45:571
121430ksoftirqd/1121650irq/29-eth0_g0_19:45:571
121750420irq/30-eth0_g0_1219-21kworker/1:223:40:321
121750420irq/30-eth0_g0_121ksoftirqd/122:32:321
121650420irq/29-eth0_g0_13-21kworker/0:122:59:580
121650420irq/29-eth0_g0_121ksoftirqd/121:35:280
121420ksoftirqd/1121650irq/29-eth0_g0_21:27:391
561599412cyclictest13688-21unixbench_multi19:37:351
31502410sleep0121650irq/29-eth0_g0_23:20:490
31502410sleep0121650irq/29-eth0_g0_23:20:490
121650410irq/29-eth0_g0_1964-21runrttasks19:03:190
121650410irq/29-eth0_g0_194642cat20:02:290
121650410irq/29-eth0_g0_13-21kworker/0:123:48:120
121650410irq/29-eth0_g0_13-21kworker/0:122:05:080
121650410irq/29-eth0_g0_13-21kworker/0:100:31:570
121650410irq/29-eth0_g0_13-21kworker/0:100:08:400
121650410irq/29-eth0_g0_13-21kworker/0:100:08:400
121410ksoftirqd/1121650irq/29-eth0_g0_23:54:500
121410ksoftirqd/1121650irq/29-eth0_g0_23:22:281
147532400sleep0121750irq/30-eth0_g0_21:56:080
121750400irq/30-eth0_g0_13-21kworker/0:123:37:150
121750400irq/30-eth0_g0_1219-21kworker/1:222:47:271
121750400irq/30-eth0_g0_1219-21kworker/1:221:46:381
121750400irq/30-eth0_g0_121ksoftirqd/121:19:181
121650400irq/29-eth0_g0_561499cyclictest23:10:240
121650400irq/29-eth0_g0_31ksoftirqd/023:02:380
121650400irq/29-eth0_g0_18619-21/usr/sbin/munin22:12:250
121650400irq/29-eth0_g0_13-21kworker/0:121:50:220
121650400irq/29-eth0_g0_13-21kworker/0:121:27:170
121400ksoftirqd/1121650irq/29-eth0_g0_22:14:301
5615993924cyclictest1964-21runrttasks21:24:331
5615993910cyclictest0-21swapper/100:01:321
561599391cyclictest11794-21date19:32:161
121750390irq/30-eth0_g0_1219-21kworker/1:221:56:371
121750390irq/30-eth0_g0_1219-21kworker/1:200:05:301
121750390irq/30-eth0_g0_121ksoftirqd/121:11:491
121650390irq/29-eth0_g0_31ksoftirqd/021:27:090
121650390irq/29-eth0_g0_2601-21diskmemload21:58:590
121650390irq/29-eth0_g0_24201-21df_abs20:22:270
121650390irq/29-eth0_g0_1964-21runrttasks20:31:420
121650390irq/29-eth0_g0_1964-21runrttasks00:13:030
121650390irq/29-eth0_g0_13681-21grep19:37:350
121650390irq/29-eth0_g0_13-21kworker/0:122:37:380
121650390irq/29-eth0_g0_13-21kworker/0:122:32:290
121650390irq/29-eth0_g0_13-21kworker/0:122:32:120
121650390irq/29-eth0_g0_13-21kworker/0:122:17:330
121650390irq/29-eth0_g0_13-21kworker/0:122:17:330
121650390irq/29-eth0_g0_13-21kworker/0:121:16:290
121650390irq/29-eth0_g0_12243-21/usr/sbin/munin23:57:310
121650390irq/29-eth0_g0_10292-21latency21:37:300
121390ksoftirqd/1121750irq/30-eth0_g0_23:27:170
121390ksoftirqd/1121750irq/30-eth0_g0_19:23:520
121390ksoftirqd/1121750irq/30-eth0_g0_00:34:240
121390ksoftirqd/1121650irq/29-eth0_g0_23:11:381
121390ksoftirqd/1121650irq/29-eth0_g0_23:02:401
121390ksoftirqd/1121650irq/29-eth0_g0_22:28:321
121390ksoftirqd/1121650irq/29-eth0_g0_20:09:441
121390ksoftirqd/1121650irq/29-eth0_g0_19:59:451
121390ksoftirqd/1121650irq/29-eth0_g0_00:30:011
121390ksoftirqd/1121650irq/29-eth0_g0_00:17:061
92732380sleep0121650irq/29-eth0_g0_23:45:450
561599382cyclictest5291-21head23:27:371
561599382cyclictest29567-21cat20:42:351
121750380irq/30-eth0_g0_1219-21kworker/1:223:54:591
121750380irq/30-eth0_g0_0-21swapper/123:44:521
121750380irq/30-eth0_g0_0-21swapper/123:16:431
121750380irq/30-eth0_g0_0-21swapper/122:37:451
121750380irq/30-eth0_g0_0-21swapper/121:50:511
121650380irq/29-eth0_g0_1964-21runrttasks20:14:280
121650380irq/29-eth0_g0_13-21kworker/0:123:37:520
121650380irq/29-eth0_g0_13-21kworker/0:121:10:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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