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2026-07-23 - 09:13

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 Thu Jul 23, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
781821450sleep0121650irq/29-eth0_g0_00:03:120
1211030ksoftirqd/1121750irq/30-eth0_g0_23:07:460
121910ksoftirqd/1121750irq/30-eth0_g0_21:11:001
121830ksoftirqd/1121750irq/30-eth0_g0_22:52:530
25512730sleep1121750irq/30-eth0_g0_23:42:521
105382700sleep0121750irq/30-eth0_g0_00:17:540
121670ksoftirqd/1121750irq/30-eth0_g0_00:11:400
5962620sleep1121750irq/30-eth0_g0_23:35:121
171672600sleep1121650irq/29-eth0_g0_22:23:041
121560ksoftirqd/1121750irq/30-eth0_g0_23:15:221
131902540sleep1121750irq/30-eth0_g0_00:27:561
121530ksoftirqd/1121750irq/30-eth0_g0_19:46:181
121500ksoftirqd/1121750irq/30-eth0_g0_23:11:431
202582490sleep1121750irq/30-eth0_g0_22:42:521
121480ksoftirqd/1121750irq/30-eth0_g0_21:49:451
121460ksoftirqd/1121650irq/29-eth0_g0_22:58:011
121450ksoftirqd/1121650irq/29-eth0_g0_20:05:491
121750440irq/30-eth0_g0_121ksoftirqd/122:02:461
121750440irq/30-eth0_g0_121ksoftirqd/122:02:461
121650440irq/29-eth0_g0_402-21unixbench_singl19:02:540
121650440irq/29-eth0_g0_31ksoftirqd/023:53:250
121650440irq/29-eth0_g0_1964-21runrttasks22:23:440
121440ksoftirqd/1121750irq/30-eth0_g0_21:20:561
121440ksoftirqd/1121650irq/29-eth0_g0_22:37:001
121650430irq/29-eth0_g0_13-21kworker/0:123:43:420
121430ksoftirqd/1121750irq/30-eth0_g0_22:08:050
121430ksoftirqd/1121650irq/29-eth0_g0_21:37:561
121430ksoftirqd/1121650irq/29-eth0_g0_20:12:561
121750420irq/30-eth0_g0_5228-21sendmail_mailqu19:22:530
121650420irq/29-eth0_g0_31ksoftirqd/023:26:430
121650420irq/29-eth0_g0_31ksoftirqd/023:12:580
121650420irq/29-eth0_g0_1513-21processes19:07:540
121420ksoftirqd/1121650irq/29-eth0_g0_21:54:540
121420ksoftirqd/1121650irq/29-eth0_g0_00:04:321
121750410irq/30-eth0_g0_1219-21kworker/1:221:32:511
121750410irq/30-eth0_g0_121ksoftirqd/121:28:111
121650410irq/29-eth0_g0_31ksoftirqd/020:42:340
121650410irq/29-eth0_g0_1964-21runrttasks22:14:370
121650410irq/29-eth0_g0_1964-21runrttasks20:57:570
121650410irq/29-eth0_g0_1964-21runrttasks20:17:440
121650410irq/29-eth0_g0_13-21kworker/0:122:43:120
121410ksoftirqd/1121650irq/29-eth0_g0_22:12:481
883994010cyclictest0-21swapper/122:20:181
88399401cyclictest30358-21diskmemload21:52:571
121650400irq/29-eth0_g0_21090-21chrt22:47:450
121650400irq/29-eth0_g0_1964-21runrttasks22:39:150
121650400irq/29-eth0_g0_1964-21runrttasks20:30:460
121650400irq/29-eth0_g0_13-21kworker/0:123:59:350
121650400irq/29-eth0_g0_13-21kworker/0:122:58:100
121650400irq/29-eth0_g0_13-21kworker/0:122:19:430
121650400irq/29-eth0_g0_13-21kworker/0:121:37:220
121650400irq/29-eth0_g0_13-21kworker/0:100:28:220
121400ksoftirqd/1121750irq/30-eth0_g0_19:28:390
121400ksoftirqd/1121750irq/30-eth0_g0_00:33:230
121400ksoftirqd/1121650irq/29-eth0_g0_22:54:591
121400ksoftirqd/1121650irq/29-eth0_g0_21:22:461
121400ksoftirqd/1121650irq/29-eth0_g0_20:22:561
121400ksoftirqd/1121650irq/29-eth0_g0_00:25:151
88399392cyclictest23739-21unixbench_multi20:37:551
88399392cyclictest18821-21grep20:17:541
88399391cyclictest3595-21ethtool23:47:471
88399391cyclictest16115-21ntp_kernel_pll_20:07:511
121750390irq/30-eth0_g0_0-21swapper/122:00:031
121650390irq/29-eth0_g0_8309-21proc_pri21:47:530
121650390irq/29-eth0_g0_31ksoftirqd/023:32:550
121650390irq/29-eth0_g0_1964-21runrttasks21:24:390
121650390irq/29-eth0_g0_1964-21runrttasks21:19:110
121650390irq/29-eth0_g0_1964-21runrttasks21:07:400
121650390irq/29-eth0_g0_1964-21runrttasks19:19:020
121650390irq/29-eth0_g0_13-21kworker/0:123:50:420
121650390irq/29-eth0_g0_13-21kworker/0:121:41:350
121650390irq/29-eth0_g0_0-21swapper/019:37:340
121390ksoftirqd/1121750irq/30-eth0_g0_23:02:450
121390ksoftirqd/1121750irq/30-eth0_g0_22:32:420
121390ksoftirqd/1121750irq/30-eth0_g0_22:30:240
121390ksoftirqd/1121750irq/30-eth0_g0_22:05:200
121390ksoftirqd/1121750irq/30-eth0_g0_22:05:200
121390ksoftirqd/1121750irq/30-eth0_g0_21:59:130
121390ksoftirqd/1121750irq/30-eth0_g0_21:42:420
121390ksoftirqd/1121750irq/30-eth0_g0_19:44:120
121390ksoftirqd/1121750irq/30-eth0_g0_00:22:420
121390ksoftirqd/1121750irq/30-eth0_g0_00:15:520
121390ksoftirqd/1121650irq/29-eth0_g0_23:28:430
88399382cyclictest29384-21df_inode21:02:531
88399382cyclictest24546-21taskset20:42:461
88399381cyclictest30358-21diskmemload22:37:471
121750380irq/30-eth0_g0_1219-21kworker/1:222:29:061
121750380irq/30-eth0_g0_121ksoftirqd/123:30:011
121750380irq/30-eth0_g0_121ksoftirqd/122:52:281
121750380irq/30-eth0_g0_121ksoftirqd/121:46:081
121750380irq/30-eth0_g0_121ksoftirqd/100:21:561
121750380irq/30-eth0_g0_121ksoftirqd/100:00:461
121650380irq/29-eth0_g0_29907-21grep21:03:020
121650380irq/29-eth0_g0_1964-21runrttasks19:16:210
121650380irq/29-eth0_g0_13-21kworker/0:123:41:440
121380ksoftirqd/1121750irq/30-eth0_g0_19:57:350
121380ksoftirqd/1121650irq/29-eth0_g0_21:00:341
121380ksoftirqd/1121650irq/29-eth0_g0_19:37:501
88399372cyclictest3733-21cat19:17:491
88399372cyclictest143702sleep100:32:571
88399371cyclictest29133-21unixbench_singl23:17:581
88399371cyclictest13452-21unixbench_singl22:07:571
88399371cyclictest108882sleep119:47:451
121750370irq/30-eth0_g0_432-21unixbench_singl19:02:551
121750370irq/30-eth0_g0_25057-21memory23:02:491
121750370irq/30-eth0_g0_1219-21kworker/1:223:54:501
121750370irq/30-eth0_g0_1219-21kworker/1:223:38:531
121750370irq/30-eth0_g0_121ksoftirqd/121:17:321
121650370irq/29-eth0_g0_28970-21zcat23:17:550
88399362cyclictest5353-21unixbench_multi19:22:551
88399361cyclictest9376-21wc00:12:531
88399361cyclictest2927-21head19:12:561
88399361cyclictest22240-21/usr/sbin/munin20:32:521
88399361cyclictest0-21swapper/119:30:081
121750360irq/30-eth0_g0_1219-21kworker/1:223:24:241
121650360irq/29-eth0_g0_27146-21awk20:52:510
121650360irq/29-eth0_g0_25834-21/usr/sbin/munin20:47:530
121650360irq/29-eth0_g0_19476-21df_abs20:22:470
121650360irq/29-eth0_g0_13-21kworker/0:121:29:030
121650360irq/29-eth0_g0_13-21kworker/0:121:17:250
88399351cyclictest13586-21sort19:57:491
88399351cyclictest12581-21grep19:52:551
121750350irq/30-eth0_g0_1219-21kworker/1:200:08:161
121650350irq/29-eth0_g0_1964-21runrttasks20:43:080
121650350irq/29-eth0_g0_1964-21runrttasks20:08:520
121650350irq/29-eth0_g0_15108-21timerandwakeup20:02:560
121650350irq/29-eth0_g0_13407-21taskset19:57:460
121650350irq/29-eth0_g0_11506-21unixbench_singl19:47:550
121350ksoftirqd/1121750irq/30-eth0_g0_20:15:510
88399347cyclictest121750irq/30-eth0_g0_19:07:501
88399341cyclictest7741-21/usr/sbin/munin19:32:561
88399341cyclictest25981-21/usr/sbin/munin20:47:561
121650340irq/29-eth0_g0_88399cyclictest20:56:001
121650340irq/29-eth0_g0_22302-21/usr/sbin/munin20:32:540
121650320irq/29-eth0_g0_0-21swapper/019:37:490
121750310irq/30-eth0_g0_20852-21interrupts20:27:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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