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2026-07-29 - 12:56

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 highest latencies:
System rack3slot5s.osadl.org (updated Wed Jul 29, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
508321430sleep1121750irq/30-eth0_g0_23:56:421
727021050sleep0121750irq/30-eth0_g0_21:52:350
1211020ksoftirqd/1121750irq/30-eth0_g0_21:47:401
1211010ksoftirqd/1121750irq/30-eth0_g0_00:36:081
121860ksoftirqd/1121750irq/30-eth0_g0_23:34:480
63392640sleep0121750irq/30-eth0_g0_00:02:040
231122640sleep1121650irq/29-eth0_g0_22:57:351
60462610sleep1121750irq/30-eth0_g0_23:58:401
92022580sleep1121750irq/30-eth0_g0_22:00:071
92022580sleep1121750irq/30-eth0_g0_22:00:071
121530ksoftirqd/1121650irq/29-eth0_g0_00:21:550
121530ksoftirqd/1121650irq/29-eth0_g0_00:21:550
121520ksoftirqd/1121750irq/30-eth0_g0_23:41:131
121650500irq/29-eth0_g0_30786-21sendmail_mailqu19:02:380
121490ksoftirqd/1121750irq/30-eth0_g0_23:48:490
121490ksoftirqd/1121750irq/30-eth0_g0_21:15:481
121480ksoftirqd/1121750irq/30-eth0_g0_21:54:171
121480ksoftirqd/1121750irq/30-eth0_g0_21:46:291
121470ksoftirqd/1121750irq/30-eth0_g0_23:28:241
121650460irq/29-eth0_g0_36442sleep021:37:340
121650460irq/29-eth0_g0_121ksoftirqd/121:52:040
121460ksoftirqd/1121750irq/30-eth0_g0_22:19:411
121460ksoftirqd/1121650irq/29-eth0_g0_22:56:120
292622450sleep0121750irq/30-eth0_g0_21:08:520
121650450irq/29-eth0_g0_31ksoftirqd/022:13:540
121650450irq/29-eth0_g0_140372sleep022:19:250
121450ksoftirqd/1121750irq/30-eth0_g0_23:09:181
121450ksoftirqd/1121750irq/30-eth0_g0_00:10:041
121450ksoftirqd/1121650irq/29-eth0_g0_23:38:500
121750440irq/30-eth0_g0_1219-21kworker/1:222:26:541
121650440irq/29-eth0_g0_31ksoftirqd/000:32:300
121440ksoftirqd/1121750irq/30-eth0_g0_23:24:211
121440ksoftirqd/1121750irq/30-eth0_g0_22:56:121
121750430irq/30-eth0_g0_1219-21kworker/1:200:27:201
121430ksoftirqd/1121750irq/30-eth0_g0_22:35:471
121430ksoftirqd/1121750irq/30-eth0_g0_22:07:360
121430ksoftirqd/1121650irq/29-eth0_g0_23:02:550
121750420irq/30-eth0_g0_1219-21kworker/1:223:02:481
121750420irq/30-eth0_g0_1219-21kworker/1:221:35:011
121750420irq/30-eth0_g0_1219-21kworker/1:221:35:011
121750420irq/30-eth0_g0_1219-21kworker/1:221:20:001
121750420irq/30-eth0_g0_1219-21kworker/1:200:05:381
121750420irq/30-eth0_g0_102402sleep122:02:581
121650420irq/29-eth0_g0_1926-21ntp_kernel_err23:42:390
121650420irq/29-eth0_g0_13-21kworker/0:123:12:040
121650420irq/29-eth0_g0_121ksoftirqd/121:38:181
20562410sleep0121650irq/29-eth0_g0_21:32:210
121750410irq/30-eth0_g0_1219-21kworker/1:223:43:221
121650410irq/29-eth0_g0_4585-21/usr/sbin/munin21:42:380
121650410irq/29-eth0_g0_32628-21latency_hist19:12:210
121750400irq/30-eth0_g0_20996-21seq20:37:201
121750400irq/30-eth0_g0_1219-21kworker/1:223:37:081
121750400irq/30-eth0_g0_1219-21kworker/1:222:49:141
121750400irq/30-eth0_g0_1219-21kworker/1:221:28:441
121650400irq/29-eth0_g0_27358-21vmstat23:12:460
121650400irq/29-eth0_g0_21625-21sendmail_mailqu20:37:410
121650400irq/29-eth0_g0_17332-21latency_hist20:22:200
121650400irq/29-eth0_g0_13-21kworker/0:122:51:290
121650400irq/29-eth0_g0_13-21kworker/0:121:35:320
121650400irq/29-eth0_g0_13-21kworker/0:121:35:320
121650400irq/29-eth0_g0_13-21kworker/0:100:16:140
121650400irq/29-eth0_g0_121ksoftirqd/122:04:510
121650400irq/29-eth0_g0_11815-21processes00:22:400
121650400irq/29-eth0_g0_0-21swapper/020:07:320
3140099391cyclictest28334-21diskmemload23:47:361
3140099391cyclictest18739-21unixbench_singl22:37:421
3140099391cyclictest13169-21grep20:02:411
121750390irq/30-eth0_g0_121ksoftirqd/119:18:111
121750390irq/30-eth0_g0_121ksoftirqd/119:18:111
121650390irq/29-eth0_g0_31ksoftirqd/000:27:400
121650390irq/29-eth0_g0_13-21kworker/0:123:31:130
121650390irq/29-eth0_g0_13-21kworker/0:123:18:140
121650390irq/29-eth0_g0_13-21kworker/0:122:42:490
121650390irq/29-eth0_g0_13-21kworker/0:121:25:310
121650390irq/29-eth0_g0_13-21kworker/0:121:20:060
121650390irq/29-eth0_g0_11817-21/usr/sbin/munin19:57:370
121390ksoftirqd/1121750irq/30-eth0_g0_21:17:190
121390ksoftirqd/1121650irq/29-eth0_g0_19:12:181
3140099381cyclictest8887-21date00:12:211
3140099381cyclictest8860-21/usr/sbin/munin19:47:441
3140099381cyclictest6683-21sort19:37:351
121750380irq/30-eth0_g0_8629-21taskset19:45:451
121750380irq/30-eth0_g0_31ksoftirqd/022:58:510
121750380irq/30-eth0_g0_1219-21kworker/1:223:20:561
121750380irq/30-eth0_g0_1219-21kworker/1:200:28:111
121650380irq/29-eth0_g0_26359-21ntpdc20:57:360
121650380irq/29-eth0_g0_16006-21/usr/sbin/munin22:27:380
121650380irq/29-eth0_g0_13-21kworker/0:122:41:190
121650380irq/29-eth0_g0_13-21kworker/0:122:33:020
121650380irq/29-eth0_g0_13-21kworker/0:122:01:060
121650380irq/29-eth0_g0_13-21kworker/0:122:01:060
121650380irq/29-eth0_g0_13-21kworker/0:100:05:190
121380ksoftirqd/1121750irq/30-eth0_g0_22:07:361
121380ksoftirqd/1121750irq/30-eth0_g0_20:04:340
121380ksoftirqd/1121750irq/30-eth0_g0_19:51:450
41350370irq/23-fsldma-c121ksoftirqd/120:37:351
31400993722cyclictest32687-21timerandwakeup21:22:411
3140099372cyclictest118712sleep119:57:391
3140099371cyclictest244412sleep120:49:471
3140099371cyclictest0-21swapper/119:32:411
121750370irq/30-eth0_g0_121ksoftirqd/122:12:271
121750370irq/30-eth0_g0_0-21swapper/121:10:361
121650370irq/29-eth0_g0_4605-21timerandwakeup23:52:410
121650370irq/29-eth0_g0_31084-21runrttasks19:03:491
121650370irq/29-eth0_g0_31ksoftirqd/023:25:270
121650370irq/29-eth0_g0_31ksoftirqd/020:37:200
121650370irq/29-eth0_g0_24168-21unixbench_multi20:47:440
121650370irq/29-eth0_g0_23241-21sshd20:45:050
121650370irq/29-eth0_g0_1964-21runrttasks22:22:460
121650370irq/29-eth0_g0_13-21kworker/0:100:08:020
121370ksoftirqd/1121650irq/29-eth0_g0_20:12:391
3140099361cyclictest28334-21diskmemload23:12:371
3140099361cyclictest27865-21unixbench_singl21:02:411
3140099361cyclictest25943-21grep20:57:211
3140099361cyclictest22688-21awk20:42:381
3140099361cyclictest17804-21awk20:22:381
3140099361cyclictest16274-21sed22:27:421
121750360irq/30-eth0_g0_1219-21kworker/1:222:45:041
121750360irq/30-eth0_g0_10719-21grep19:52:401
121750360irq/30-eth0_g0_0-21swapper/119:27:381
121650360irq/29-eth0_g0_6714-21missed_timers19:37:360
121650360irq/29-eth0_g0_27593-21ntp_offset21:02:370
121650360irq/29-eth0_g0_1796-21taskset19:17:360
121650360irq/29-eth0_g0_1796-21taskset19:17:360
121650360irq/29-eth0_g0_17822-21runrttasks20:22:390
3140099351cyclictest946-21head19:12:451
3140099351cyclictest946-21head19:12:451
3140099351cyclictest14467-21/usr/sbin/munin20:07:431
3140099351cyclictest10229-21df_abs00:17:321
3140099351cyclictest10229-21df_abs00:17:321
121650350irq/29-eth0_g0_8281-21grep19:42:440
121650350irq/29-eth0_g0_4672-21unixbench_singl19:27:410
121650350irq/29-eth0_g0_1964-21runrttasks19:32:220
121650350irq/29-eth0_g0_16161-21ls20:17:200
121650350irq/29-eth0_g0_10143-21df_abs19:52:310
121650350irq/29-eth0_g0_0-21swapper/020:52:460
3140099341cyclictest30352sleep119:22:361
3140099341cyclictest19060-21taskset20:27:381
121650340irq/29-eth0_g0_3116-21/usr/sbin/munin19:22:370
121650340irq/29-eth0_g0_19097-21ps20:27:390
121650330irq/29-eth0_g0_489-21iostat19:12:360
121650330irq/29-eth0_g0_489-21iostat19:12:360
3140099321cyclictest17330-21cat20:22:201
121750310irq/30-eth0_g0_25975-21/usr/sbin/munin20:57:341
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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