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2026-07-28 - 06:16

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 Jul 28, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3001521280sleep0121650irq/29-eth0_g0_21:10:510
1211130ksoftirqd/1121750irq/30-eth0_g0_23:47:231
121850ksoftirqd/1121750irq/30-eth0_g0_00:07:220
60622630sleep0121650irq/29-eth0_g0_21:44:310
45202600sleep0121750irq/30-eth0_g0_23:52:190
122462590sleep0121750irq/30-eth0_g0_22:10:110
24672580sleep0121650irq/29-eth0_g0_21:30:270
121560ksoftirqd/1121750irq/30-eth0_g0_22:33:021
19572520sleep0121650irq/29-eth0_g0_23:41:050
121510ksoftirqd/1121750irq/30-eth0_g0_21:15:461
121500ksoftirqd/1121750irq/30-eth0_g0_23:50:231
290802480sleep1121750irq/30-eth0_g0_21:07:351
103782480sleep1121750irq/30-eth0_g0_22:02:391
5912460sleep1121650irq/29-eth0_g0_23:34:471
121460ksoftirqd/1121650irq/29-eth0_g0_23:16:111
121460ksoftirqd/1121650irq/29-eth0_g0_23:16:111
121460ksoftirqd/1121650irq/29-eth0_g0_21:41:441
121450ksoftirqd/1121750irq/30-eth0_g0_22:28:501
121450ksoftirqd/1121650irq/29-eth0_g0_00:34:341
115202450sleep1121750irq/30-eth0_g0_00:18:111
121440ksoftirqd/1121650irq/29-eth0_g0_22:47:441
111262440sleep0121650irq/29-eth0_g0_00:17:400
31922994328cyclictest1964-21runrttasks19:59:191
121750430irq/30-eth0_g0_121ksoftirqd/123:37:421
121650430irq/29-eth0_g0_13-21kworker/0:122:33:280
121430ksoftirqd/1121750irq/30-eth0_g0_22:22:171
265492420sleep1121750irq/30-eth0_g0_23:07:441
121750420irq/30-eth0_g0_1483-21/usr/sbin/munin21:27:451
121750420irq/30-eth0_g0_1219-21kworker/1:222:12:371
121650420irq/29-eth0_g0_32085-21df19:07:360
121650420irq/29-eth0_g0_13-21kworker/0:123:02:170
121650420irq/29-eth0_g0_13-21kworker/0:121:14:400
121420ksoftirqd/1121650irq/29-eth0_g0_21:38:260
121750410irq/30-eth0_g0_1219-21kworker/1:221:17:341
121750410irq/30-eth0_g0_121ksoftirqd/121:58:161
121650410irq/29-eth0_g0_23277-21ntp_offset20:42:410
121650410irq/29-eth0_g0_21703-21timerandwakeup22:47:430
121650410irq/29-eth0_g0_13-21kworker/0:123:14:000
121650410irq/29-eth0_g0_13-21kworker/0:123:14:000
121650410irq/29-eth0_g0_0-21swapper/021:27:220
121410ksoftirqd/1121650irq/29-eth0_g0_21:46:311
121410ksoftirqd/1121650irq/29-eth0_g0_00:27:590
121410ksoftirqd/1121650irq/29-eth0_g0_00:27:590
3192299402cyclictest12278-21sort00:22:381
121750400irq/30-eth0_g0_121ksoftirqd/123:52:451
121650400irq/29-eth0_g0_31ksoftirqd/023:35:000
121650400irq/29-eth0_g0_1964-21runrttasks22:21:450
121650400irq/29-eth0_g0_1964-21runrttasks19:06:330
121650400irq/29-eth0_g0_13-21kworker/0:123:45:550
121650400irq/29-eth0_g0_13-21kworker/0:123:31:220
121650400irq/29-eth0_g0_13-21kworker/0:122:23:030
121650400irq/29-eth0_g0_13-21kworker/0:100:00:570
121400ksoftirqd/1121650irq/29-eth0_g0_20:07:451
121400ksoftirqd/1121650irq/29-eth0_g0_20:07:451
121400ksoftirqd/1121650irq/29-eth0_g0_00:03:041
3192299391cyclictest17426-21grep20:17:451
3192299391cyclictest13722-21ps00:27:441
3192299391cyclictest13722-21ps00:27:441
121750390irq/30-eth0_g0_1219-21kworker/1:223:06:001
121750390irq/30-eth0_g0_121ksoftirqd/122:42:381
121750390irq/30-eth0_g0_121ksoftirqd/122:10:481
121750390irq/30-eth0_g0_121ksoftirqd/100:16:121
121650390irq/29-eth0_g0_99852sleep000:12:400
121650390irq/29-eth0_g0_9057-21taskset00:08:030
121650390irq/29-eth0_g0_5278-21unixbench_multi23:52:460
121650390irq/29-eth0_g0_31ksoftirqd/023:27:000
121650390irq/29-eth0_g0_31ksoftirqd/020:32:380
121650390irq/29-eth0_g0_13-21kworker/0:122:45:550
121650390irq/29-eth0_g0_13-21kworker/0:121:55:070
121650390irq/29-eth0_g0_13-21kworker/0:121:32:540
121650390irq/29-eth0_g0_0-21swapper/019:27:420
121390ksoftirqd/1121750irq/30-eth0_g0_23:17:420
121390ksoftirqd/1121750irq/30-eth0_g0_23:07:590
121390ksoftirqd/1121750irq/30-eth0_g0_23:05:230
121390ksoftirqd/1121750irq/30-eth0_g0_22:14:070
121390ksoftirqd/1121750irq/30-eth0_g0_22:01:100
121390ksoftirqd/1121750irq/30-eth0_g0_21:47:550
121390ksoftirqd/1121750irq/30-eth0_g0_21:47:550
121390ksoftirqd/1121750irq/30-eth0_g0_20:50:120
121390ksoftirqd/1121750irq/30-eth0_g0_19:41:040
121390ksoftirqd/1121750irq/30-eth0_g0_19:37:080
121390ksoftirqd/1121750irq/30-eth0_g0_00:25:320
121390ksoftirqd/1121650irq/29-eth0_g0_23:02:191
121390ksoftirqd/1121650irq/29-eth0_g0_19:43:061
121390ksoftirqd/1121650irq/29-eth0_g0_19:38:401
3192299381cyclictest22396-21df_abs22:52:361
3192299381cyclictest21056-21grep20:32:441
121750380irq/30-eth0_g0_19226-21timerandwakeup22:37:451
121750380irq/30-eth0_g0_1219-21kworker/1:222:25:451
121750380irq/30-eth0_g0_1219-21kworker/1:221:47:371
121750380irq/30-eth0_g0_1219-21kworker/1:221:47:371
121750380irq/30-eth0_g0_121ksoftirqd/123:27:341
121750380irq/30-eth0_g0_0-21swapper/121:34:171
121750380irq/30-eth0_g0_0-21swapper/119:02:361
121650380irq/29-eth0_g0_31ksoftirqd/000:33:020
121650380irq/29-eth0_g0_27935-21df_abs21:02:360
121650380irq/29-eth0_g0_2255-21if_eth019:17:350
121650380irq/29-eth0_g0_13-21kworker/0:122:53:150
121650380irq/29-eth0_g0_13-21kworker/0:122:37:440
121650380irq/29-eth0_g0_13-21kworker/0:122:06:250
121650380irq/29-eth0_g0_121ksoftirqd/122:29:350
121650380irq/29-eth0_g0_11093-21proc_pri19:52:431
121380ksoftirqd/1121750irq/30-eth0_g0_21:22:351
121380ksoftirqd/1121750irq/30-eth0_g0_21:18:130
121380ksoftirqd/1121650irq/29-eth0_g0_19:36:141
121380ksoftirqd/1121650irq/29-eth0_g0_19:30:531
121380ksoftirqd/1121650irq/29-eth0_g0_19:12:521
121380ksoftirqd/1121650irq/29-eth0_g0_00:07:401
3192299372cyclictest30270-21timerandwakeup23:22:451
121750370irq/30-eth0_g0_1219-21kworker/1:223:17:321
121650370irq/29-eth0_g0_1964-21runrttasks19:57:450
121650370irq/29-eth0_g0_18643-21unixbench_multi20:22:460
121370ksoftirqd/116156-21grep20:12:441
121370ksoftirqd/1121650irq/29-eth0_g0_19:11:161
3192299362cyclictest26857-21memory20:57:391
3192299362cyclictest0-21swapper/121:52:401
3192299361cyclictest24825-21uptime20:47:441
3192299361cyclictest21831-21chrt20:37:351
121650360irq/29-eth0_g0_1964-21runrttasks19:50:140
121650360irq/29-eth0_g0_1964-21runrttasks19:46:490
121650360irq/29-eth0_g0_0-21swapper/020:02:340
121360ksoftirqd/1121750irq/30-eth0_g0_21:02:170
121360ksoftirqd/1121750irq/30-eth0_g0_20:27:370
3192299351cyclictest22954-21df20:42:361
3192299351cyclictest2117-21df_abs19:17:331
3192299351cyclictest19876-21/usr/sbin/munin20:27:441
3192299351cyclictest186232sleep120:22:451
121750350irq/30-eth0_g0_0-21swapper/123:58:241
121750350irq/30-eth0_g0_0-21swapper/120:02:361
121650350irq/29-eth0_g0_3813-21sendmail_mailqu19:22:430
121650350irq/29-eth0_g0_3813-21sendmail_mailqu19:22:430
121650350irq/29-eth0_g0_31920-21cyclictest20:17:440
121650350irq/29-eth0_g0_1964-21runrttasks19:53:110
121650350irq/29-eth0_g0_1141-21missed_timers19:13:090
1099350migration/19938-21sendmail_mailqu19:47:421
3192299341cyclictest28171-21/usr/sbin/munin21:02:411
3192299341cyclictest0-21swapper/120:52:391
121650340irq/29-eth0_g0_25871-21/usr/sbin/munin20:52:430
121650340irq/29-eth0_g0_21729-21df_abs20:37:340
121650340irq/29-eth0_g0_15761-21runrttasks20:12:360
121650340irq/29-eth0_g0_15484-21cat20:12:240
121650340irq/29-eth0_g0_15484-21cat20:12:240
3192299331cyclictest3994-21taskset19:22:451
3192299331cyclictest3994-21taskset19:22:451
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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