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2026-09-16 - 07:36

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 Sep 16, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
241402970sleep0121750irq/30-eth0_g0_23:10:390
121940ksoftirqd/1121750irq/30-eth0_g0_21:33:531
121850ksoftirqd/1121750irq/30-eth0_g0_19:45:210
274422770sleep0121650irq/29-eth0_g0_23:25:010
121720ksoftirqd/1121750irq/30-eth0_g0_00:03:530
121750470irq/30-eth0_g0_1219-21kworker/1:223:14:451
121470ksoftirqd/1121650irq/29-eth0_g0_22:45:391
121750460irq/30-eth0_g0_1219-21kworker/1:223:09:061
121460ksoftirqd/1121650irq/29-eth0_g0_21:18:501
28473994533cyclictest9057-21grep19:55:451
28473994532cyclictest7577-21awk19:50:421
121750450irq/30-eth0_g0_1219-21kworker/1:221:10:021
121750450irq/30-eth0_g0_1219-21kworker/1:200:21:201
121650450irq/29-eth0_g0_1964-21runrttasks19:15:440
121650450irq/29-eth0_g0_121ksoftirqd/122:00:381
121450ksoftirqd/1121750irq/30-eth0_g0_20:00:380
28473994429cyclictest29948-21grep21:20:461
121750440irq/30-eth0_g0_1219-21kworker/1:221:57:221
121750440irq/30-eth0_g0_1219-21kworker/1:200:28:091
121750440irq/30-eth0_g0_1219-21kworker/1:200:01:511
121650440irq/29-eth0_g0_1964-21runrttasks22:20:290
121440ksoftirqd/1121750irq/30-eth0_g0_23:24:111
121440ksoftirqd/1121750irq/30-eth0_g0_20:05:370
121440ksoftirqd/1121650irq/29-eth0_g0_23:40:541
121440ksoftirqd/1121650irq/29-eth0_g0_21:45:141
121440ksoftirqd/1121650irq/29-eth0_g0_21:10:511
121750430irq/30-eth0_g0_1219-21kworker/1:222:43:301
121750430irq/30-eth0_g0_1219-21kworker/1:221:29:521
121430ksoftirqd/1121650irq/29-eth0_g0_00:05:541
114132430sleep1121750irq/30-eth0_g0_20:05:451
28473994229cyclictest22098-21grep23:00:451
27892420sleep0121650irq/29-eth0_g0_21:43:470
121750420irq/30-eth0_g0_1219-21kworker/1:223:58:531
121650420irq/29-eth0_g0_1964-21runrttasks22:43:280
28473994129cyclictest24533-21df_inode21:00:351
28473994128cyclictest32492-21cpu23:45:341
121750410irq/30-eth0_g0_1219-21kworker/1:222:56:481
121750410irq/30-eth0_g0_1219-21kworker/1:222:11:461
121750410irq/30-eth0_g0_1219-21kworker/1:200:12:111
121750410irq/30-eth0_g0_121ksoftirqd/122:05:301
121750410irq/30-eth0_g0_0-21swapper/120:35:371
121650410irq/29-eth0_g0_13-21kworker/0:122:59:040
121650410irq/29-eth0_g0_13-21kworker/0:100:25:440
121650410irq/29-eth0_g0_0-21swapper/022:09:250
298282400sleep0121650irq/29-eth0_g0_23:34:130
28473994027cyclictest29709-21latency_hist19:10:241
28473994027cyclictest21083-21ntp_kernel_pll_20:45:401
28473994027cyclictest21083-21ntp_kernel_pll_20:45:401
28473994027cyclictest17688-21head20:30:441
121750400irq/30-eth0_g0_1219-21kworker/1:223:16:421
121750400irq/30-eth0_g0_121ksoftirqd/122:34:141
121650400irq/29-eth0_g0_1964-21runrttasks22:54:450
121650400irq/29-eth0_g0_1674-21seq19:25:450
121650400irq/29-eth0_g0_13-21kworker/0:123:29:330
121650400irq/29-eth0_g0_13-21kworker/0:122:02:190
121650400irq/29-eth0_g0_13-21kworker/0:100:07:300
121650400irq/29-eth0_g0_1219-21kworker/1:222:51:111
121400ksoftirqd/1121650irq/29-eth0_g0_21:32:330
114222400sleep0121750irq/30-eth0_g0_22:19:160
28473993927cyclictest2653-21netstat19:30:381
28473993927cyclictest19733-21/usr/sbin/munin20:40:391
28473993927cyclictest19733-21/usr/sbin/munin20:40:391
121750390irq/30-eth0_g0_1219-21kworker/1:223:37:271
121750390irq/30-eth0_g0_1219-21kworker/1:222:30:161
121750390irq/30-eth0_g0_1219-21kworker/1:222:23:241
121750390irq/30-eth0_g0_1219-21kworker/1:221:55:141
121750390irq/30-eth0_g0_1219-21kworker/1:221:49:021
121750390irq/30-eth0_g0_1219-21kworker/1:200:31:401
121750390irq/30-eth0_g0_121ksoftirqd/123:53:011
121750390irq/30-eth0_g0_121ksoftirqd/123:30:051
121750390irq/30-eth0_g0_121ksoftirqd/122:38:461
121750390irq/30-eth0_g0_121ksoftirqd/122:38:461
121650390irq/29-eth0_g0_26296-21grep21:05:460
121650390irq/29-eth0_g0_259672sleep023:17:090
121650390irq/29-eth0_g0_13-21kworker/0:123:57:050
121650390irq/29-eth0_g0_13-21kworker/0:122:38:320
121650390irq/29-eth0_g0_13-21kworker/0:122:38:320
121650390irq/29-eth0_g0_13-21kworker/0:121:20:370
121650390irq/29-eth0_g0_0-21swapper/023:48:240
121650390irq/29-eth0_g0_0-21swapper/019:00:440
121390ksoftirqd/1121750irq/30-eth0_g0_23:05:340
28473993824cyclictest1095-21df_abs19:25:361
121750380irq/30-eth0_g0_1219-21kworker/1:222:17:161
121750380irq/30-eth0_g0_1219-21kworker/1:200:16:421
121750380irq/30-eth0_g0_1219-21kworker/1:200:16:421
121650380irq/29-eth0_g0_9251-21timerandwakeup00:20:440
121650380irq/29-eth0_g0_8059-21unixbench_multi00:15:440
121650380irq/29-eth0_g0_8059-21unixbench_multi00:15:440
121650380irq/29-eth0_g0_6903-21unixbench_singl00:10:450
121650380irq/29-eth0_g0_4246-21/usr/sbin/munin21:50:330
121650380irq/29-eth0_g0_30591-21df21:25:350
121650380irq/29-eth0_g0_30420-21ntp_states23:35:400
121650380irq/29-eth0_g0_1964-21runrttasks21:01:150
121650380irq/29-eth0_g0_13-21kworker/0:121:46:360
121650380irq/29-eth0_g0_13-21kworker/0:121:19:250
110942380sleep0121650irq/29-eth0_g0_00:30:250
28473993725cyclictest10845-21grep20:05:241
28473993723cyclictest12387-21taskset20:10:381
121750370irq/30-eth0_g0_5966-21/usr/sbin/munin19:45:411
121750370irq/30-eth0_g0_1964-21runrttasks19:03:381
121750370irq/30-eth0_g0_1219-21kworker/1:223:30:421
121750370irq/30-eth0_g0_121ksoftirqd/121:36:131
121750370irq/30-eth0_g0_121ksoftirqd/121:36:131
121650370irq/29-eth0_g0_6623-21unixbench_multi19:45:450
121650370irq/29-eth0_g0_4069-21awk19:35:450
121650370irq/29-eth0_g0_23843-21head20:55:490
121650370irq/29-eth0_g0_23110-21cat20:55:240
121650370irq/29-eth0_g0_1964-21runrttasks22:32:330
121650370irq/29-eth0_g0_1964-21runrttasks19:34:410
121650370irq/29-eth0_g0_138392sleep022:28:510
121650370irq/29-eth0_g0_13-21kworker/0:123:42:110
121650370irq/29-eth0_g0_13-21kworker/0:123:04:210
121650370irq/29-eth0_g0_13-21kworker/0:122:49:260
121650370irq/29-eth0_g0_13-21kworker/0:122:12:080
121650370irq/29-eth0_g0_13-21kworker/0:121:59:230
121650370irq/29-eth0_g0_1222-21unixbench_singl21:35:460
121650370irq/29-eth0_g0_1222-21unixbench_singl21:35:460
28473993624cyclictest30064-21latency19:10:401
28473993623cyclictest14809-21cat20:20:391
28473993622cyclictest13733-21grep20:15:421
2847399362cyclictest16173-21taskset20:25:411
121650360irq/29-eth0_g0_32491-21latency19:20:390
121650360irq/29-eth0_g0_30418-21grep19:10:460
121650360irq/29-eth0_g0_28885-21missed_timers19:05:400
121650360irq/29-eth0_g0_1964-21runrttasks20:44:510
121650360irq/29-eth0_g0_1964-21runrttasks20:44:510
121650360irq/29-eth0_g0_18703-21proc_pri20:35:430
121650360irq/29-eth0_g0_15062-21processes20:20:440
121650360irq/29-eth0_g0_13-21kworker/0:121:11:490
121650350irq/29-eth0_g0_9560-21/usr/sbin/munin20:00:230
121650350irq/29-eth0_g0_7576-21ntpdc19:50:420
121650350irq/29-eth0_g0_1964-21runrttasks20:47:430
121650350irq/29-eth0_g0_1964-21runrttasks20:47:430
121650350irq/29-eth0_g0_16343-21sendmail_mailtr20:25:440
121650350irq/29-eth0_g0_13-21kworker/0:123:52:100
121650350irq/29-eth0_g0_121ksoftirqd/120:57:211
121650350irq/29-eth0_g0_0-21swapper/020:15:380
28473993428cyclictest22133-21if_eth020:50:371
121650340irq/29-eth0_g0_12998-21runrttasks20:12:350
121650330irq/29-eth0_g0_17317-21wc20:30:390
121650330irq/29-eth0_g0_121ksoftirqd/119:20:381
121750320irq/30-eth0_g0_5932-21latency_hist19:45:241
121750320irq/30-eth0_g0_31318-21cat19:15:391
28473993125cyclictest37442sleep119:35:381
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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