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2026-08-12 - 00:45

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 all highest latencies:
System rack3slot5s.osadl.org (updated Tue Aug 11, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2088521400sleep0121650irq/29-eth0_g0_10:13:530
1509921290sleep1121650irq/29-eth0_g0_09:51:531
979121160sleep1121650irq/29-eth0_g0_09:28:011
121900ksoftirqd/1121750irq/30-eth0_g0_10:03:431
267812800sleep1121750irq/30-eth0_g0_10:37:091
293172740sleep1121750irq/30-eth0_g0_10:47:111
168402690chrt121750irq/30-eth0_g0_07:46:481
121680ksoftirqd/1121750irq/30-eth0_g0_10:41:260
116852680sleep1121750irq/30-eth0_g0_11:48:131
49112650sleep0121750irq/30-eth0_g0_09:08:190
226982610chrt121650irq/29-eth0_g0_12:33:120
155542560sleep1121750irq/30-eth0_g0_12:05:301
155542560sleep1121750irq/30-eth0_g0_12:05:301
173732550sleep0121750irq/30-eth0_g0_10:00:470
121470ksoftirqd/1121750irq/30-eth0_g0_11:03:191
121470ksoftirqd/1121750irq/30-eth0_g0_11:03:191
121470ksoftirqd/1121650irq/29-eth0_g0_11:16:390
7028994611cyclictest2109-21lldpd09:42:081
121460ksoftirqd/1121650irq/29-eth0_g0_10:33:341
121650450irq/29-eth0_g0_31ksoftirqd/008:57:030
121450ksoftirqd/1121750irq/30-eth0_g0_11:33:151
121450ksoftirqd/1121650irq/29-eth0_g0_11:17:020
121450ksoftirqd/1121650irq/29-eth0_g0_11:14:411
178362440sleep0121650irq/29-eth0_g0_12:13:320
121750440irq/30-eth0_g0_1219-21kworker/1:209:50:141
121750440irq/30-eth0_g0_1219-21kworker/1:209:11:151
121440ksoftirqd/1121650irq/29-eth0_g0_11:41:590
121440ksoftirqd/1121650irq/29-eth0_g0_10:30:051
93512430sleep1121650irq/29-eth0_g0_11:39:331
121750430irq/30-eth0_g0_1219-21kworker/1:209:26:041
121650430irq/29-eth0_g0_30191-21ntp_kernel_pll_10:52:050
121650430irq/29-eth0_g0_16141-21awk12:07:050
121430ksoftirqd/1121650irq/29-eth0_g0_11:31:261
121750420irq/30-eth0_g0_1219-21kworker/1:212:18:461
121750420irq/30-eth0_g0_1219-21kworker/1:211:43:291
121750420irq/30-eth0_g0_121ksoftirqd/112:35:521
121650420irq/29-eth0_g0_26128-21unixbench_multi08:22:140
121650420irq/29-eth0_g0_19159-21ntp_kernel_pll_10:07:030
121420ksoftirqd/1121750irq/30-eth0_g0_09:32:130
158692410sleep0121650irq/29-eth0_g0_09:52:280
129852410sleep1121750irq/30-eth0_g0_11:54:071
121650410irq/29-eth0_g0_910-21sendmail_mailqu08:52:080
121650410irq/29-eth0_g0_1964-21runrttasks08:28:160
121650410irq/29-eth0_g0_13-21kworker/0:112:27:000
121650410irq/29-eth0_g0_13-21kworker/0:111:57:100
121650410irq/29-eth0_g0_13-21kworker/0:109:13:480
121410ksoftirqd/1121650irq/29-eth0_g0_10:17:301
121410ksoftirqd/1121650irq/29-eth0_g0_07:12:031
702899401cyclictest0-21swapper/110:44:001
121750400irq/30-eth0_g0_1219-21kworker/1:210:52:331
121750400irq/30-eth0_g0_10384-21forks09:32:031
121650400irq/29-eth0_g0_7026-21cyclictest07:06:480
121650400irq/29-eth0_g0_20420-21runrttasks08:00:500
121650400irq/29-eth0_g0_13-21kworker/0:112:21:530
121650400irq/29-eth0_g0_121ksoftirqd/109:41:270
121400ksoftirqd/1121750irq/30-eth0_g0_11:53:420
121400ksoftirqd/1121750irq/30-eth0_g0_09:22:080
121400ksoftirqd/1121750irq/30-eth0_g0_07:42:500
121400ksoftirqd/1121650irq/29-eth0_g0_10:50:040
121400ksoftirqd/1121650irq/29-eth0_g0_10:23:031
702899391cyclictest20465-21ps10:12:071
121750390irq/30-eth0_g0_31606-21taskset08:46:581
121750390irq/30-eth0_g0_13-21kworker/0:111:37:030
121750390irq/30-eth0_g0_1219-21kworker/1:211:20:161
121750390irq/30-eth0_g0_1219-21kworker/1:210:56:581
121750390irq/30-eth0_g0_121ksoftirqd/112:30:391
121750390irq/30-eth0_g0_0-21swapper/111:09:121
121650390irq/29-eth0_g0_22506-21unixbench_singl08:07:090
121650390irq/29-eth0_g0_21124-21taskset08:02:070
121650390irq/29-eth0_g0_1964-21runrttasks07:48:470
121650390irq/29-eth0_g0_121ksoftirqd/110:27:530
121650390irq/29-eth0_g0_121ksoftirqd/109:57:011
121390ksoftirqd/1121750irq/30-eth0_g0_11:34:000
121390ksoftirqd/1121750irq/30-eth0_g0_11:25:090
121390ksoftirqd/1121750irq/30-eth0_g0_11:07:350
121390ksoftirqd/1121750irq/30-eth0_g0_11:04:350
121390ksoftirqd/1121750irq/30-eth0_g0_11:04:350
121390ksoftirqd/1121750irq/30-eth0_g0_10:59:040
121390ksoftirqd/1121750irq/30-eth0_g0_10:43:050
121390ksoftirqd/1121750irq/30-eth0_g0_10:33:280
121390ksoftirqd/1121750irq/30-eth0_g0_10:25:350
121390ksoftirqd/1121750irq/30-eth0_g0_10:17:400
121390ksoftirqd/1121750irq/30-eth0_g0_10:01:510
121390ksoftirqd/1121750irq/30-eth0_g0_09:47:510
121390ksoftirqd/1121650irq/29-eth0_g0_08:12:291
702899382cyclictest29854-21unixbench_singl08:37:091
702899381cyclictest27039-21sort08:27:031
125322380sleep1121650irq/29-eth0_g0_09:41:241
121750380irq/30-eth0_g0_1219-21kworker/1:209:17:101
121750380irq/30-eth0_g0_1219-21kworker/1:209:14:041
121650380irq/29-eth0_g0_19045-21runrttasks07:54:040
121650380irq/29-eth0_g0_13-21kworker/0:112:02:040
121650380irq/29-eth0_g0_13-21kworker/0:112:02:040
121650380irq/29-eth0_g0_13-21kworker/0:109:17:120
121380ksoftirqd/1121750irq/30-eth0_g0_11:31:430
121380ksoftirqd/1121750irq/30-eth0_g0_08:32:380
121380ksoftirqd/1121650irq/29-eth0_g0_08:26:201
119502380sleep0121650irq/29-eth0_g0_11:51:190
702899371cyclictest2260-21grep08:57:091
702899371cyclictest17520-21sendmail_mailqu12:12:081
702899371cyclictest0-21swapper/108:36:241
121750370irq/30-eth0_g0_31ksoftirqd/007:38:400
121650370irq/29-eth0_g0_7805-21grep07:07:090
121650370irq/29-eth0_g0_29415-21sort08:37:010
121650370irq/29-eth0_g0_1964-21runrttasks07:17:580
121650370irq/29-eth0_g0_13-21kworker/0:112:20:130
121650370irq/29-eth0_g0_13-21kworker/0:109:44:570
121650370irq/29-eth0_g0_13-21kworker/0:109:29:460
121370ksoftirqd/1121650irq/29-eth0_g0_12:10:571
121370ksoftirqd/1121650irq/29-eth0_g0_08:21:011
702899362cyclictest15107-21tail07:37:071
702899361cyclictest18615-21ps07:52:081
702899361cyclictest0-21swapper/107:46:591
702899360cyclictest0-21swapper/109:02:521
702899360cyclictest0-21swapper/109:02:521
121750360irq/30-eth0_g0_602-21/usr/sbin/munin08:52:021
121750360irq/30-eth0_g0_1219-21kworker/1:212:24:441
121650360irq/29-eth0_g0_23740-21unixbench_singl08:12:090
121650360irq/29-eth0_g0_1964-21runrttasks07:25:560
121650360irq/29-eth0_g0_1964-21runrttasks07:03:401
121650360irq/29-eth0_g0_13773-21zcat07:32:070
121650360irq/29-eth0_g0_13773-21zcat07:32:070
121650360irq/29-eth0_g0_13164-21latency_hist07:31:480
121650360irq/29-eth0_g0_121ksoftirqd/111:59:561
121360ksoftirqd/1121750irq/30-eth0_g0_08:46:270
702899357cyclictest121750irq/30-eth0_g0_11:21:551
702899352cyclictest31051-21sed08:42:091
702899352cyclictest18932-21df_inode10:06:591
702899351cyclictest22124-21sort08:07:031
702899351cyclictest195612sleep107:57:011
121750350irq/30-eth0_g0_9938-21netstat07:17:031
121750350irq/30-eth0_g0_20727-21df_abs08:02:001
121650350irq/29-eth0_g0_24391-21df_abs08:16:590
121350ksoftirqd/1121650irq/29-eth0_g0_07:31:481
121750340irq/30-eth0_g0_11446-21unixbench_multi07:22:111
121650340irq/29-eth0_g0_9021-21grep07:12:100
121650340irq/29-eth0_g0_32140-21sendmail_mailqu08:47:070
121750330irq/30-eth0_g0_13649-21ntpq07:32:051
121750330irq/30-eth0_g0_13649-21ntpq07:32:051
121650330irq/29-eth0_g0_3222-21netstat09:02:030
121650330irq/29-eth0_g0_3222-21netstat09:02:030
121650320irq/29-eth0_g0_7328-21ethtool07:07:011
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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