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2026-03-20 - 12:06

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 792 highest latencies:
System rack3slot5s.osadl.org (updated Fri Mar 20, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211070ksoftirqd/1121750irq/30-eth0_g0_20:49:541
1211060ksoftirqd/1121750irq/30-eth0_g0_21:55:141
121930ksoftirqd/1121750irq/30-eth0_g0_23:54:541
121840ksoftirqd/1121650irq/29-eth0_g0_23:34:360
121780ksoftirqd/1121750irq/30-eth0_g0_23:24:591
197302720sleep1121750irq/30-eth0_g0_21:49:521
121640ksoftirqd/1121750irq/30-eth0_g0_21:48:390
121600ksoftirqd/1121750irq/30-eth0_g0_22:04:531
121600ksoftirqd/1121750irq/30-eth0_g0_22:04:531
244812580sleep0121650irq/29-eth0_g0_00:21:100
121580ksoftirqd/1121750irq/30-eth0_g0_23:36:151
121530ksoftirqd/1121750irq/30-eth0_g0_23:03:161
121510ksoftirqd/1121750irq/30-eth0_g0_22:47:381
121500ksoftirqd/1121750irq/30-eth0_g0_23:10:341
121500ksoftirqd/1121750irq/30-eth0_g0_23:04:511
121500ksoftirqd/1121650irq/29-eth0_g0_21:56:460
121480ksoftirqd/1121750irq/30-eth0_g0_22:44:480
121480ksoftirqd/1121750irq/30-eth0_g0_19:35:011
121460ksoftirqd/1121750irq/30-eth0_g0_21:33:050
121450ksoftirqd/1121750irq/30-eth0_g0_21:19:011
121450ksoftirqd/1121650irq/29-eth0_g0_23:24:520
192192440sleep1121750irq/30-eth0_g0_21:49:011
12550994430cyclictest2029-21runrttasks22:42:181
121440ksoftirqd/1121750irq/30-eth0_g0_22:14:431
121650430irq/29-eth0_g0_31ksoftirqd/023:07:350
121650430irq/29-eth0_g0_31ksoftirqd/000:09:250
121750420irq/30-eth0_g0_470-21kworker/1:122:33:391
121650420irq/29-eth0_g0_31ksoftirqd/023:20:030
121650420irq/29-eth0_g0_31ksoftirqd/022:05:540
121650420irq/29-eth0_g0_31ksoftirqd/022:05:540
121650420irq/29-eth0_g0_2029-21runrttasks21:07:530
121650420irq/29-eth0_g0_121ksoftirqd/122:09:460
121650420irq/29-eth0_g0_121ksoftirqd/121:39:471
121420ksoftirqd/1121650irq/29-eth0_g0_23:45:401
121750410irq/30-eth0_g0_470-21kworker/1:100:24:511
121650410irq/29-eth0_g0_31ksoftirqd/021:59:570
121650410irq/29-eth0_g0_13-21kworker/0:123:43:260
121650410irq/29-eth0_g0_13-21kworker/0:123:39:270
121650410irq/29-eth0_g0_13-21kworker/0:122:49:470
121410ksoftirqd/1121650irq/29-eth0_g0_23:47:520
121750400irq/30-eth0_g0_470-21kworker/1:123:40:271
121750400irq/30-eth0_g0_470-21kworker/1:122:24:231
121750400irq/30-eth0_g0_121ksoftirqd/121:38:261
121650400irq/29-eth0_g0_31307-21missed_timers20:24:530
121650400irq/29-eth0_g0_31ksoftirqd/022:55:030
121650400irq/29-eth0_g0_31ksoftirqd/019:39:510
121650400irq/29-eth0_g0_2029-21runrttasks19:05:010
121650400irq/29-eth0_g0_13-21kworker/0:122:38:150
121650400irq/29-eth0_g0_13-21kworker/0:121:34:510
121650400irq/29-eth0_g0_13-21kworker/0:100:29:400
121650400irq/29-eth0_g0_13-21kworker/0:100:29:400
121650400irq/29-eth0_g0_13-21kworker/0:100:11:070
121400ksoftirqd/1121750irq/30-eth0_g0_22:18:580
121400ksoftirqd/1121750irq/30-eth0_g0_00:01:270
121400ksoftirqd/1121650irq/29-eth0_g0_19:43:071
1255099391cyclictest9472-21diskmemload21:29:521
121750390irq/30-eth0_g0_470-21kworker/1:100:24:331
121750390irq/30-eth0_g0_121ksoftirqd/123:20:001
121750390irq/30-eth0_g0_121ksoftirqd/100:10:441
121750390irq/30-eth0_g0_11465-21df19:04:481
121750390irq/30-eth0_g0_0-21swapper/100:37:441
121650390irq/29-eth0_g0_13-21kworker/0:123:09:480
121650390irq/29-eth0_g0_13-21kworker/0:122:41:570
121390ksoftirqd/1121750irq/30-eth0_g0_23:57:320
121390ksoftirqd/1121750irq/30-eth0_g0_23:51:150
121390ksoftirqd/1121750irq/30-eth0_g0_21:52:170
121390ksoftirqd/1121750irq/30-eth0_g0_21:39:550
121390ksoftirqd/1121750irq/30-eth0_g0_21:14:450
121390ksoftirqd/1121750irq/30-eth0_g0_20:51:280
121390ksoftirqd/1121750irq/30-eth0_g0_20:45:440
121390ksoftirqd/1121750irq/30-eth0_g0_20:40:400
121390ksoftirqd/1121750irq/30-eth0_g0_20:16:080
121390ksoftirqd/1121750irq/30-eth0_g0_20:05:020
121390ksoftirqd/1121750irq/30-eth0_g0_20:00:460
121390ksoftirqd/1121750irq/30-eth0_g0_19:50:410
121390ksoftirqd/1121750irq/30-eth0_g0_19:22:100
1255099381cyclictest30200-21/usr/sbin/munin20:19:551
1255099381cyclictest26769-21head20:04:571
1255099381cyclictest249932sleep119:59:501
1255099381cyclictest2152-21snmpd22:24:521
1255099381cyclictest21436-21cat19:44:501
1255099381cyclictest15787-21head19:19:581
121750380irq/30-eth0_g0_470-21kworker/1:123:30:231
121750380irq/30-eth0_g0_470-21kworker/1:122:57:041
121750380irq/30-eth0_g0_470-21kworker/1:121:11:231
121750380irq/30-eth0_g0_121ksoftirqd/122:13:091
121750380irq/30-eth0_g0_121ksoftirqd/122:02:161
121650380irq/29-eth0_g0_13-21kworker/0:122:32:300
121650380irq/29-eth0_g0_13-21kworker/0:122:23:110
121650380irq/29-eth0_g0_13-21kworker/0:100:38:300
121380ksoftirqd/1121750irq/30-eth0_g0_21:28:190
121380ksoftirqd/1121750irq/30-eth0_g0_21:00:580
121380ksoftirqd/1121750irq/30-eth0_g0_20:13:450
121380ksoftirqd/1121750irq/30-eth0_g0_00:26:590
121380ksoftirqd/1121650irq/29-eth0_g0_23:14:511
121380ksoftirqd/1121650irq/29-eth0_g0_21:01:371
1255099372cyclictest6294-21ntp_states20:54:551
1255099372cyclictest17755-21iostat19:29:491
1255099372cyclictest16771-21grep19:24:561
1255099371cyclictest9472-21diskmemload00:29:551
1255099371cyclictest9472-21diskmemload00:29:551
121750370irq/30-eth0_g0_470-21kworker/1:121:27:401
121650370irq/29-eth0_g0_470-21kworker/1:123:52:121
121650370irq/29-eth0_g0_32764-21mailstats20:29:580
121650370irq/29-eth0_g0_31ksoftirqd/023:16:420
121650370irq/29-eth0_g0_31ksoftirqd/020:34:570
121650370irq/29-eth0_g0_2029-21runrttasks20:57:470
121650370irq/29-eth0_g0_13994-21grep19:14:480
121650370irq/29-eth0_g0_13060-21taskset19:09:540
121650370irq/29-eth0_g0_13-21kworker/0:122:26:490
121650370irq/29-eth0_g0_13-21kworker/0:121:13:140
121650370irq/29-eth0_g0_13-21kworker/0:100:17:010
121650370irq/29-eth0_g0_121ksoftirqd/100:01:311
1255099361cyclictest24323-21grep19:54:581
1255099361cyclictest23123-21head00:14:591
1255099361cyclictest2295-21unixbench_singl22:49:581
1255099361cyclictest14498-21grep19:14:581
1255099361cyclictest0-21swapper/120:39:591
121750360irq/30-eth0_g0_31024-21/usr/sbin/munin22:34:581
121750360irq/30-eth0_g0_12991-21runrttasks21:22:451
121650360irq/29-eth0_g0_2029-21runrttasks19:44:470
121650360irq/29-eth0_g0_18055-21sendmail_mailqu19:29:550
121650360irq/29-eth0_g0_13-21kworker/0:123:04:100
121650360irq/29-eth0_g0_13-21kworker/0:121:23:170
121360ksoftirqd/1121650irq/29-eth0_g0_21:04:581
121360ksoftirqd/1121650irq/29-eth0_g0_20:11:441
1255099352cyclictest29177-21unixbench_multi20:14:591
1255099352cyclictest2048-21/usr/sbin/munin19:11:511
1255099351cyclictest20654-21grep00:04:571
121650350irq/29-eth0_g0_24318-21unixbench_singl19:54:580
121650350irq/29-eth0_g0_17433-21munin-plugin-st19:29:360
1255099341cyclictest9742sleep120:34:471
121650340irq/29-eth0_g0_30279-21processes20:19:560
121650340irq/29-eth0_g0_0-21swapper/019:34:540
1255099331cyclictest22641-21iostat19:49:491
1255099331cyclictest0-21swapper/120:28:061
121650330irq/29-eth0_g0_2171-21lldpd20:44:481
121330ksoftirqd/1121650irq/29-eth0_g0_20:29:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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