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2026-08-25 - 01:55

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Tue Aug 25, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1582121580sleep1121750irq/30-eth0_g0_23:18:231
2914621470sleep1121650irq/29-eth0_g0_00:22:181
801021000chrt121750irq/30-eth0_g0_22:46:320
158202620sleep0121650irq/29-eth0_g0_23:18:220
269902610sleep1121650irq/29-eth0_g0_00:15:411
121540ksoftirqd/1121750irq/30-eth0_g0_22:07:181
121500ksoftirqd/1121750irq/30-eth0_g0_21:44:431
121500ksoftirqd/1121750irq/30-eth0_g0_21:22:231
121480ksoftirqd/1121750irq/30-eth0_g0_23:15:081
121480ksoftirqd/1121750irq/30-eth0_g0_22:12:421
121470ksoftirqd/1121650irq/29-eth0_g0_23:52:491
121460ksoftirqd/1121750irq/30-eth0_g0_23:37:151
121460ksoftirqd/1121750irq/30-eth0_g0_21:17:101
121460ksoftirqd/1121650irq/29-eth0_g0_22:24:450
121460ksoftirqd/1121650irq/29-eth0_g0_19:59:271
121650450irq/29-eth0_g0_31ksoftirqd/022:31:150
121450ksoftirqd/1121750irq/30-eth0_g0_22:39:471
121450ksoftirqd/1121650irq/29-eth0_g0_22:58:431
121450ksoftirqd/1121650irq/29-eth0_g0_21:49:061
121450ksoftirqd/1121650irq/29-eth0_g0_20:54:451
121450ksoftirqd/1121650irq/29-eth0_g0_00:26:241
121440ksoftirqd/1121750irq/30-eth0_g0_23:06:051
121440ksoftirqd/1121650irq/29-eth0_g0_21:02:041
121750430irq/30-eth0_g0_1219-21kworker/1:222:05:231
121650430irq/29-eth0_g0_31ksoftirqd/021:45:330
121650430irq/29-eth0_g0_31ksoftirqd/000:26:360
121650430irq/29-eth0_g0_1964-21runrttasks19:05:450
121430ksoftirqd/1121650irq/29-eth0_g0_00:31:591
121750420irq/30-eth0_g0_31ksoftirqd/021:06:330
121750420irq/30-eth0_g0_31ksoftirqd/021:06:330
121750420irq/30-eth0_g0_1219-21kworker/1:223:49:271
121650420irq/29-eth0_g0_121ksoftirqd/122:32:350
121420ksoftirqd/1121650irq/29-eth0_g0_23:08:341
121420ksoftirqd/1121650irq/29-eth0_g0_23:08:341
121750410irq/30-eth0_g0_172202sleep123:25:241
121650410irq/29-eth0_g0_31ksoftirqd/022:03:370
121650410irq/29-eth0_g0_31ksoftirqd/019:26:350
121650410irq/29-eth0_g0_13-21kworker/0:123:28:180
121650410irq/29-eth0_g0_121ksoftirqd/100:32:280
121650410irq/29-eth0_g0_0-21swapper/023:01:340
121650410irq/29-eth0_g0_0-21swapper/019:36:330
121410ksoftirqd/1121750irq/30-eth0_g0_00:18:240
121410ksoftirqd/1121650irq/29-eth0_g0_21:38:171
121410ksoftirqd/1121650irq/29-eth0_g0_20:49:511
121750400irq/30-eth0_g0_1219-21kworker/1:221:31:311
121750400irq/30-eth0_g0_121ksoftirqd/122:46:521
121650400irq/29-eth0_g0_31ksoftirqd/023:38:140
121650400irq/29-eth0_g0_31ksoftirqd/022:11:270
121650400irq/29-eth0_g0_13-21kworker/0:123:09:040
121650400irq/29-eth0_g0_13-21kworker/0:123:09:040
121650400irq/29-eth0_g0_13-21kworker/0:122:08:190
121650400irq/29-eth0_g0_13-21kworker/0:121:39:550
121650400irq/29-eth0_g0_13-21kworker/0:121:28:450
121650400irq/29-eth0_g0_13-21kworker/0:121:21:220
121650400irq/29-eth0_g0_13-21kworker/0:121:14:420
121650400irq/29-eth0_g0_121ksoftirqd/123:43:391
121650400irq/29-eth0_g0_0-21swapper/020:06:350
121650400irq/29-eth0_g0_0-21swapper/000:00:360
121400ksoftirqd/1121750irq/30-eth0_g0_21:56:160
121400ksoftirqd/1121750irq/30-eth0_g0_21:48:150
121400ksoftirqd/1121650irq/29-eth0_g0_21:57:171
121400ksoftirqd/1121650irq/29-eth0_g0_20:17:471
1848199391cyclictest21662-21grep19:16:371
1848199391cyclictest18914-21chrt23:31:371
121750390irq/30-eth0_g0_24358-21forks00:01:300
121750390irq/30-eth0_g0_121ksoftirqd/100:17:591
121650390irq/29-eth0_g0_63532sleep022:41:210
121650390irq/29-eth0_g0_5675-21sendmail_mailqu22:36:350
121650390irq/29-eth0_g0_31ksoftirqd/022:53:340
121650390irq/29-eth0_g0_1964-21runrttasks23:23:060
121650390irq/29-eth0_g0_19043-21open_inodes23:31:400
121650390irq/29-eth0_g0_13-21kworker/0:123:43:530
121650390irq/29-eth0_g0_13-21kworker/0:121:56:520
121650390irq/29-eth0_g0_13-21kworker/0:121:31:490
121650390irq/29-eth0_g0_13-21kworker/0:121:19:040
121390ksoftirqd/1121750irq/30-eth0_g0_23:48:400
121390ksoftirqd/1121750irq/30-eth0_g0_22:59:470
121390ksoftirqd/1121750irq/30-eth0_g0_22:16:370
121390ksoftirqd/1121750irq/30-eth0_g0_20:26:520
121390ksoftirqd/1121750irq/30-eth0_g0_19:58:490
121390ksoftirqd/1121750irq/30-eth0_g0_19:51:100
121390ksoftirqd/1121750irq/30-eth0_g0_19:26:040
121390ksoftirqd/1121750irq/30-eth0_g0_19:16:530
121390ksoftirqd/1121750irq/30-eth0_g0_19:15:420
121390ksoftirqd/1121750irq/30-eth0_g0_19:09:140
121390ksoftirqd/1121750irq/30-eth0_g0_00:13:330
121390ksoftirqd/1121650irq/29-eth0_g0_22:51:581
1848199381cyclictest32574-21fgrep20:01:361
1848199381cyclictest322-21df_abs22:16:271
1848199381cyclictest29046-21grep19:46:371
1848199381cyclictest27199-21unixbench_multi21:51:371
1848199381cyclictest2449-21seq20:11:331
121750380irq/30-eth0_g0_121ksoftirqd/122:22:141
121750380irq/30-eth0_g0_0-21swapper/121:13:301
121650380irq/29-eth0_g0_1964-21runrttasks20:41:540
121650380irq/29-eth0_g0_1964-21runrttasks20:18:570
121650380irq/29-eth0_g0_1964-21runrttasks19:52:460
121650380irq/29-eth0_g0_1964-21runrttasks19:46:090
121650380irq/29-eth0_g0_13-21kworker/0:123:11:370
121650380irq/29-eth0_g0_121ksoftirqd/122:44:241
121380ksoftirqd/1121750irq/30-eth0_g0_20:23:320
121380ksoftirqd/1121750irq/30-eth0_g0_00:06:281
121380ksoftirqd/1121750irq/30-eth0_g0_00:06:281
121380ksoftirqd/1121650irq/29-eth0_g0_21:06:251
121380ksoftirqd/1121650irq/29-eth0_g0_21:06:251
121380ksoftirqd/1121650irq/29-eth0_g0_20:58:161
1848199371cyclictest24124-21tail19:26:351
1848199371cyclictest20431-21/usr/sbin/munin21:26:361
1848199371cyclictest10053-21grep20:41:361
121750370irq/30-eth0_g0_18008-21grep19:01:361
121650370irq/29-eth0_g0_8436-21latency20:36:300
121650370irq/29-eth0_g0_1964-21runrttasks19:33:090
121650370irq/29-eth0_g0_13680-21sort20:56:370
121650370irq/29-eth0_g0_13-21kworker/0:121:06:150
121650370irq/29-eth0_g0_13-21kworker/0:100:23:390
121650370irq/29-eth0_g0_121ksoftirqd/122:35:521
1848199362cyclictest19272-21head19:06:371
1848199361cyclictest25362-21grep19:31:371
1848199361cyclictest24390-21ethtool00:01:301
1848199361cyclictest20962-21sort19:16:161
1848199361cyclictest18086-21head23:26:371
1848199361cyclictest0-21swapper/122:31:151
121750360irq/30-eth0_g0_121ksoftirqd/119:54:301
121750360irq/30-eth0_g0_0-21swapper/123:58:141
121650360irq/29-eth0_g0_27603-21taskset19:41:341
121650360irq/29-eth0_g0_2707-21unixbench_multi20:11:380
121650360irq/29-eth0_g0_13-21kworker/0:123:55:320
121650360irq/29-eth0_g0_12540-21grep20:51:360
121360ksoftirqd/1121750irq/30-eth0_g0_20:01:220
121360ksoftirqd/1121650irq/29-eth0_g0_20:25:241
121360ksoftirqd/1121650irq/29-eth0_g0_19:22:261
121650350irq/29-eth0_g0_25702-21memory00:06:310
121650350irq/29-eth0_g0_25702-21memory00:06:310
121650350irq/29-eth0_g0_1964-21runrttasks20:47:150
121650350irq/29-eth0_g0_0-21swapper/020:31:300
121350ksoftirqd/1121650irq/29-eth0_g0_20:36:161
1848199341cyclictest26561-21grep19:36:371
1848199341cyclictest0-21swapper/120:36:361
1848199331cyclictest60012sleep120:26:311
121330ksoftirqd/1909-21taskset20:06:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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