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2026-06-28 - 13:09

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 Sun Jun 28, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
759921280sleep0121650irq/29-eth0_g0_21:23:570
168082810sleep1121750irq/30-eth0_g0_19:48:551
310812800sleep0121750irq/30-eth0_g0_22:58:570
39752700sleep0121650irq/29-eth0_g0_23:23:200
121650490irq/29-eth0_g0_13-21kworker/0:122:33:510
121490ksoftirqd/1121650irq/29-eth0_g0_00:00:371
121750470irq/30-eth0_g0_11027-21memory21:38:501
121750460irq/30-eth0_g0_31ksoftirqd/023:13:550
121460ksoftirqd/1121750irq/30-eth0_g0_21:08:351
121460ksoftirqd/1121750irq/30-eth0_g0_21:08:351
121750440irq/30-eth0_g0_3764-21taskset23:20:551
121650440irq/29-eth0_g0_121ksoftirqd/100:28:560
121650440irq/29-eth0_g0_0-21swapper/021:43:540
121750430irq/30-eth0_g0_121ksoftirqd/122:08:351
121430ksoftirqd/1121750irq/30-eth0_g0_21:11:381
121750420irq/30-eth0_g0_5377-21missed_timers19:03:510
121750420irq/30-eth0_g0_1219-21kworker/1:222:30:451
121650420irq/29-eth0_g0_421-21df23:08:460
121650420irq/29-eth0_g0_31ksoftirqd/000:18:250
121650420irq/29-eth0_g0_13-21kworker/0:122:11:320
121650420irq/29-eth0_g0_13-21kworker/0:100:06:270
73832410sleep0121650irq/29-eth0_g0_23:35:070
121750410irq/30-eth0_g0_7958-21chrt21:25:571
121750410irq/30-eth0_g0_13-21kworker/0:121:12:470
121750410irq/30-eth0_g0_1219-21kworker/1:222:54:171
121750410irq/30-eth0_g0_1219-21kworker/1:222:43:491
121650410irq/29-eth0_g0_31ksoftirqd/021:22:020
121650410irq/29-eth0_g0_20456-21munin-run22:18:340
121650410irq/29-eth0_g0_13-21kworker/0:122:04:070
121650410irq/29-eth0_g0_13-21kworker/0:121:35:590
121650410irq/29-eth0_g0_13-21kworker/0:100:19:150
121650410irq/29-eth0_g0_10383-21df_inode23:48:460
121650410irq/29-eth0_g0_0-21swapper/023:53:540
121410ksoftirqd/1121650irq/29-eth0_g0_20:43:171
121750400irq/30-eth0_g0_1219-21kworker/1:222:26:071
121750400irq/30-eth0_g0_1219-21kworker/1:200:08:071
121650400irq/29-eth0_g0_5336-21taskset21:14:020
121650400irq/29-eth0_g0_20441-21grep20:03:560
121650400irq/29-eth0_g0_13-21kworker/0:122:30:590
121650400irq/29-eth0_g0_13-21kworker/0:122:24:540
121650400irq/29-eth0_g0_13-21kworker/0:121:42:040
121650400irq/29-eth0_g0_13-21kworker/0:100:09:060
121650400irq/29-eth0_g0_0-21swapper/020:23:500
121750390irq/30-eth0_g0_18314-21vmstat00:18:581
121750390irq/30-eth0_g0_1219-21kworker/1:223:00:091
121750390irq/30-eth0_g0_1219-21kworker/1:222:41:011
121650390irq/29-eth0_g0_8901-21df19:18:470
121650390irq/29-eth0_g0_8543-21cat21:28:480
121650390irq/29-eth0_g0_326622sleep023:07:490
121650390irq/29-eth0_g0_31ksoftirqd/022:38:360
121650390irq/29-eth0_g0_1964-21runrttasks20:37:080
121650390irq/29-eth0_g0_13-21kworker/0:122:48:530
121650390irq/29-eth0_g0_13-21kworker/0:122:48:530
121650390irq/29-eth0_g0_13-21kworker/0:122:48:150
121650390irq/29-eth0_g0_13-21kworker/0:121:51:010
121650390irq/29-eth0_g0_13-21kworker/0:121:51:010
121650390irq/29-eth0_g0_13-21kworker/0:100:36:320
121650390irq/29-eth0_g0_0-21swapper/021:58:580
121390ksoftirqd/1121650irq/29-eth0_g0_20:36:341
121390ksoftirqd/1121650irq/29-eth0_g0_00:33:411
622199388cyclictest18795-21if_eth019:58:471
121750380irq/30-eth0_g0_13-21kworker/0:123:44:250
121750380irq/30-eth0_g0_1219-21kworker/1:223:23:471
121750380irq/30-eth0_g0_1219-21kworker/1:222:23:291
121750380irq/30-eth0_g0_1219-21kworker/1:221:38:101
121750380irq/30-eth0_g0_1219-21kworker/1:221:30:391
121750380irq/30-eth0_g0_1219-21kworker/1:221:20:141
121750380irq/30-eth0_g0_0-21swapper/123:05:211
121750380irq/30-eth0_g0_0-21swapper/122:37:041
121650380irq/29-eth0_g0_5489-21/usr/sbin/munin23:28:470
121650380irq/29-eth0_g0_31ksoftirqd/000:23:400
121650380irq/29-eth0_g0_26643-21unixbench_singl20:28:560
121650380irq/29-eth0_g0_1964-21runrttasks22:54:340
121650380irq/29-eth0_g0_1964-21runrttasks19:28:160
121650380irq/29-eth0_g0_14569-21/usr/sbin/munin21:53:470
121650380irq/29-eth0_g0_13-21kworker/0:123:38:400
121650380irq/29-eth0_g0_0-21swapper/019:28:510
121380ksoftirqd/1121650irq/29-eth0_g0_22:17:551
121380ksoftirqd/1121650irq/29-eth0_g0_20:06:211
121380ksoftirqd/1121650irq/29-eth0_g0_19:45:541
121380ksoftirqd/1121650irq/29-eth0_g0_19:08:581
121750370irq/30-eth0_g0_5473-21taskset19:03:521
121750370irq/30-eth0_g0_18642-21awk22:08:551
121750370irq/30-eth0_g0_1219-21kworker/1:223:40:431
121750370irq/30-eth0_g0_1219-21kworker/1:223:14:001
121750370irq/30-eth0_g0_1219-21kworker/1:223:13:201
121750370irq/30-eth0_g0_1219-21kworker/1:222:51:301
121750370irq/30-eth0_g0_1219-21kworker/1:222:51:301
121750370irq/30-eth0_g0_1219-21kworker/1:221:54:401
121750370irq/30-eth0_g0_1219-21kworker/1:221:14:381
121750370irq/30-eth0_g0_0-21swapper/123:56:331
121750370irq/30-eth0_g0_0-21swapper/123:35:351
121750370irq/30-eth0_g0_0-21swapper/120:48:351
121650370irq/29-eth0_g0_8200-21unixbench_multi19:13:570
121650370irq/29-eth0_g0_31556-21sed20:48:540
121650370irq/29-eth0_g0_23714-21/usr/sbin/munin20:18:490
121650370irq/29-eth0_g0_17892-21sendmail_mailqu19:53:550
121650370irq/29-eth0_g0_13-21kworker/0:123:24:470
121650370irq/29-eth0_g0_13-21kworker/0:122:22:370
121650370irq/29-eth0_g0_12688-21/usr/sbin/munin19:33:490
121650370irq/29-eth0_g0_12688-21/usr/sbin/munin19:33:490
121650370irq/29-eth0_g0_0-21swapper/020:58:570
121370ksoftirqd/1121650irq/29-eth0_g0_19:18:561
121750360irq/30-eth0_g0_1219-21kworker/1:223:33:081
121750360irq/30-eth0_g0_1219-21kworker/1:221:51:541
121750360irq/30-eth0_g0_1219-21kworker/1:221:51:541
121750360irq/30-eth0_g0_1219-21kworker/1:200:29:551
121650360irq/29-eth0_g0_23412-21cat20:18:340
121650360irq/29-eth0_g0_1964-21runrttasks21:08:270
121650360irq/29-eth0_g0_1964-21runrttasks21:08:270
121650360irq/29-eth0_g0_1964-21runrttasks20:56:200
121650360irq/29-eth0_g0_1964-21runrttasks20:39:470
121650360irq/29-eth0_g0_1964-21runrttasks20:03:090
121360ksoftirqd/1121650irq/29-eth0_g0_20:23:461
171492350sleep1121750irq/30-eth0_g0_00:14:311
121750350irq/30-eth0_g0_1219-21kworker/1:223:47:291
121750350irq/30-eth0_g0_1219-21kworker/1:200:23:571
121750350irq/30-eth0_g0_1219-21kworker/1:200:09:191
121650350irq/29-eth0_g0_1964-21runrttasks20:46:520
121650350irq/29-eth0_g0_15150-21grep19:43:480
121650350irq/29-eth0_g0_13375-21grep23:58:570
622199343cyclictest18528-21latency_hist19:58:351
139712340sleep113972-21memory19:38:501
121750340irq/30-eth0_g0_1219-21kworker/1:222:01:181
121750340irq/30-eth0_g0_1022-21df_inode20:58:461
121650340irq/29-eth0_g0_1964-21runrttasks19:11:310
121650340irq/29-eth0_g0_16817-21unixbench_singl19:48:550
121650340irq/29-eth0_g0_14207-21zcat19:38:550
622199332cyclictest10162-21runrttasks19:23:481
121750330irq/30-eth0_g0_2109-21lldpd20:31:481
121750330irq/30-eth0_g0_1983-21/usr/sbin/munin20:10:451
121750330irq/30-eth0_g0_1983-21/usr/sbin/munin20:10:451
121750330irq/30-eth0_g0_1219-21kworker/1:221:46:101
121750330irq/30-eth0_g0_10691-21proc_pri23:48:531
121650330irq/29-eth0_g0_21113-21df_abs20:08:450
121650330irq/29-eth0_g0_21113-21df_abs20:08:450
622199322cyclictest8231-21unixbench_singl19:13:571
622199322cyclictest32309-21seq20:53:481
126852320sleep112688-21irqstats19:33:491
126852320sleep112688-21irqstats19:33:491
121650320irq/29-eth0_g0_11909-21grep19:28:541
121320ksoftirqd/1121650irq/29-eth0_g0_20:51:511
121320ksoftirqd/1121650irq/29-eth0_g0_20:21:521
121750310irq/30-eth0_g0_0-21swapper/120:13:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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