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2026-09-03 - 17:08

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 Thu Sep 03, 2026 12:43:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2040021430chrt121750irq/30-eth0_g0_10:24:310
134621330sleep1121650irq/29-eth0_g0_11:18:171
1211140ksoftirqd/1121750irq/30-eth0_g0_12:21:061
121800ksoftirqd/1121750irq/30-eth0_g0_07:01:101
92122640sleep0121650irq/29-eth0_g0_07:26:080
121550ksoftirqd/1121750irq/30-eth0_g0_11:26:441
265752510sleep1121750irq/30-eth0_g0_08:36:131
24742480sleep1121750irq/30-eth0_g0_11:21:551
121480ksoftirqd/1121750irq/30-eth0_g0_12:32:001
121470ksoftirqd/1121750irq/30-eth0_g0_11:49:050
121470ksoftirqd/1121750irq/30-eth0_g0_10:45:041
121470ksoftirqd/1121650irq/29-eth0_g0_12:03:121
121470ksoftirqd/1121650irq/29-eth0_g0_11:21:360
121460ksoftirqd/1121650irq/29-eth0_g0_07:12:011
121650450irq/29-eth0_g0_31ksoftirqd/009:44:150
121450ksoftirqd/1121750irq/30-eth0_g0_12:09:351
121450ksoftirqd/1121750irq/30-eth0_g0_09:31:011
121750440irq/30-eth0_g0_1219-21kworker/1:212:19:261
121750440irq/30-eth0_g0_1219-21kworker/1:210:21:551
121440ksoftirqd/1121650irq/29-eth0_g0_09:24:221
121440ksoftirqd/1121650irq/29-eth0_g0_08:18:591
121750430irq/30-eth0_g0_1219-21kworker/1:211:42:581
121750430irq/30-eth0_g0_1219-21kworker/1:209:15:121
121430ksoftirqd/1121750irq/30-eth0_g0_11:52:251
121430ksoftirqd/1121750irq/30-eth0_g0_11:10:461
121430ksoftirqd/1121750irq/30-eth0_g0_09:24:040
121650420irq/29-eth0_g0_1964-21runrttasks07:04:340
121650420irq/29-eth0_g0_13-21kworker/0:111:56:040
121420ksoftirqd/1121650irq/29-eth0_g0_11:35:421
42282410sleep1121750irq/30-eth0_g0_09:16:481
121750410irq/30-eth0_g0_1219-21kworker/1:211:15:121
121650410irq/29-eth0_g0_31ksoftirqd/009:36:130
121650410irq/29-eth0_g0_1964-21runrttasks10:04:480
121650410irq/29-eth0_g0_1964-21runrttasks09:57:020
121650410irq/29-eth0_g0_13-21kworker/0:112:18:470
121650410irq/29-eth0_g0_121ksoftirqd/111:39:170
121650410irq/29-eth0_g0_121ksoftirqd/111:39:170
121410ksoftirqd/1121650irq/29-eth0_g0_08:41:131
388999407cyclictest121750irq/30-eth0_g0_10:14:461
121750400irq/30-eth0_g0_1219-21kworker/1:209:44:141
121750400irq/30-eth0_g0_10875-21df_abs09:46:081
121750400irq/30-eth0_g0_0-21swapper/112:28:461
121750400irq/30-eth0_g0_0-21swapper/107:36:091
121650400irq/29-eth0_g0_38832proc_pri09:16:110
121650400irq/29-eth0_g0_31ksoftirqd/011:13:160
121650400irq/29-eth0_g0_31ksoftirqd/010:54:530
121650400irq/29-eth0_g0_31ksoftirqd/010:42:270
121650400irq/29-eth0_g0_31ksoftirqd/010:12:170
121650400irq/29-eth0_g0_13-21kworker/0:112:22:570
121650400irq/29-eth0_g0_13-21kworker/0:112:15:120
121650400irq/29-eth0_g0_13-21kworker/0:111:00:210
121650400irq/29-eth0_g0_13-21kworker/0:110:07:260
121650400irq/29-eth0_g0_10640-21find07:31:130
388999391cyclictest25903-21ntpq10:46:081
388999391cyclictest14597-21unixbench_multi12:11:141
121750390irq/30-eth0_g0_1219-21kworker/1:211:37:271
121750390irq/30-eth0_g0_1219-21kworker/1:211:37:271
121750390irq/30-eth0_g0_1219-21kworker/1:210:07:211
121750390irq/30-eth0_g0_121ksoftirqd/111:01:541
121750390irq/30-eth0_g0_121ksoftirqd/110:38:021
121650390irq/29-eth0_g0_2796-21timerandwakeup09:11:130
121650390irq/29-eth0_g0_13-21kworker/0:112:28:060
121650390irq/29-eth0_g0_13-21kworker/0:110:34:510
121650390irq/29-eth0_g0_13-21kworker/0:110:26:280
121650390irq/29-eth0_g0_13-21kworker/0:110:20:420
121650390irq/29-eth0_g0_13-21kworker/0:109:10:220
121390ksoftirqd/1121750irq/30-eth0_g0_11:34:480
121390ksoftirqd/1121750irq/30-eth0_g0_09:26:420
121390ksoftirqd/1121750irq/30-eth0_g0_08:22:490
121390ksoftirqd/1121650irq/29-eth0_g0_09:56:391
388999382cyclictest1964-21runrttasks10:33:271
388999381cyclictest20849-21irqstats10:26:101
388999381cyclictest15607-21cat07:51:111
388999381cyclictest14431-21unixbench_multi07:46:141
121750380irq/30-eth0_g0_8640-21sshd11:47:171
121750380irq/30-eth0_g0_28339-21/usr/sbin/munin10:56:101
121750380irq/30-eth0_g0_1219-21kworker/1:210:02:101
121750380irq/30-eth0_g0_0-21swapper/109:52:291
121750380irq/30-eth0_g0_0-21swapper/109:52:291
121750380irq/30-eth0_g0_0-21swapper/109:36:061
121750380irq/30-eth0_g0_0-21swapper/109:10:451
121650380irq/29-eth0_g0_26452-21ntp_states08:36:110
121650380irq/29-eth0_g0_1964-21runrttasks12:31:470
121650380irq/29-eth0_g0_1964-21runrttasks08:41:360
121650380irq/29-eth0_g0_1964-21runrttasks07:25:200
121650380irq/29-eth0_g0_13-21kworker/0:111:52:000
121650380irq/29-eth0_g0_13-21kworker/0:111:05:130
121650380irq/29-eth0_g0_121ksoftirqd/108:34:050
121650380irq/29-eth0_g0_1110-21sed11:16:130
121380ksoftirqd/1121750irq/30-eth0_g0_09:51:430
121380ksoftirqd/1121750irq/30-eth0_g0_09:51:430
121380ksoftirqd/1121750irq/30-eth0_g0_08:51:530
388999371cyclictest9221-21cat07:26:081
121750370irq/30-eth0_g0_13603-21chrt07:44:521
121750370irq/30-eth0_g0_1219-21kworker/1:210:18:551
121650370irq/29-eth0_g0_7820-21grep09:31:140
121650370irq/29-eth0_g0_401-21unixbench_singl09:01:160
121650370irq/29-eth0_g0_31ksoftirqd/007:36:080
121650370irq/29-eth0_g0_1964-21runrttasks11:30:100
121650370irq/29-eth0_g0_1964-21runrttasks07:17:000
121650370irq/29-eth0_g0_14951-21latency_hist07:50:530
121650370irq/29-eth0_g0_13262-21sendmail_mailqu12:06:160
121650370irq/29-eth0_g0_13-21kworker/0:111:43:240
121650370irq/29-eth0_g0_13-21kworker/0:110:36:040
121650370irq/29-eth0_g0_13-21kworker/0:109:47:200
388999361cyclictest859-21diskmemload11:56:051
388999361cyclictest7898-21taskset07:21:081
388999361cyclictest6582-21df_inode07:16:041
388999361cyclictest30405-21grep08:51:141
121750360irq/30-eth0_g0_1219-21kworker/1:210:52:121
121650360irq/29-eth0_g0_5663-21proc_pri07:11:110
121650360irq/29-eth0_g0_1964-21runrttasks08:49:420
121650360irq/29-eth0_g0_1964-21runrttasks07:09:250
121650360irq/29-eth0_g0_1964-21runrttasks07:09:250
121650360irq/29-eth0_g0_18095-21unixbench_multi08:01:130
121650360irq/29-eth0_g0_13-21kworker/0:112:04:420
121650360irq/29-eth0_g0_13-21kworker/0:111:06:420
121650360irq/29-eth0_g0_13-21kworker/0:110:47:420
388999351cyclictest10241-21df_abs07:31:051
388999350cyclictest0-21swapper/109:01:131
121750350irq/30-eth0_g0_25958-21latency_hist08:35:531
121750350irq/30-eth0_g0_1219-21kworker/1:209:26:081
121650350irq/29-eth0_g0_20536-21unixbench_multi08:11:130
121650350irq/29-eth0_g0_20536-21unixbench_multi08:11:130
121650350irq/29-eth0_g0_1964-21runrttasks08:20:070
121650350irq/29-eth0_g0_1964-21runrttasks07:50:540
121650350irq/29-eth0_g0_1964-21runrttasks07:42:130
121650350irq/29-eth0_g0_16924-21grep07:56:160
121350ksoftirqd/124366-21taskset08:26:421
388999341cyclictest17709-21latency08:01:061
388999341cyclictest0-21swapper/108:56:511
388999340cyclictest0-21swapper/107:09:331
388999340cyclictest0-21swapper/107:09:331
121650340irq/29-eth0_g0_388999cyclictest07:56:101
121650340irq/29-eth0_g0_31477-21zcat08:56:120
121650340irq/29-eth0_g0_23841-21latency08:26:060
121650340irq/29-eth0_g0_19827-21latency_hist08:10:530
121750330irq/30-eth0_g0_0-21swapper/108:06:051
121330ksoftirqd/129467-21seq08:48:591
229942320sleep123007-21unixbench_multi08:21:141
121650310irq/29-eth0_g0_20300-21awk08:11:091
121650310irq/29-eth0_g0_20300-21awk08:11:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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