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2025-11-22 - 09:07

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 Sat Nov 22, 2025 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
32312970sleep0121750irq/30-eth0_g0_23:10:130
121820ksoftirqd/1121650irq/29-eth0_g0_21:53:551
121800ksoftirqd/1121750irq/30-eth0_g0_21:34:110
192522690sleep1121750irq/30-eth0_g0_00:15:101
159192620sleep0121750irq/30-eth0_g0_00:03:570
152572580sleep0121650irq/29-eth0_g0_21:49:120
45672550sleep0121750irq/30-eth0_g0_21:05:000
121550ksoftirqd/1121750irq/30-eth0_g0_23:05:051
121550ksoftirqd/1121750irq/30-eth0_g0_20:45:011
121750480irq/30-eth0_g0_121ksoftirqd/100:05:081
121480ksoftirqd/1121650irq/29-eth0_g0_23:54:460
121470ksoftirqd/1121750irq/30-eth0_g0_21:55:121
29822460sleep1121750irq/30-eth0_g0_23:10:081
121750460irq/30-eth0_g0_121ksoftirqd/121:45:211
121460ksoftirqd/1121650irq/29-eth0_g0_22:43:181
121460ksoftirqd/1121650irq/29-eth0_g0_00:35:001
121460ksoftirqd/1121650irq/29-eth0_g0_00:35:001
224502450chrt121650irq/29-eth0_g0_20:05:040
211112450sleep1121650irq/29-eth0_g0_22:11:011
121650450irq/29-eth0_g0_20059-21missed_timers00:20:020
121450ksoftirqd/1121750irq/30-eth0_g0_22:34:341
121450ksoftirqd/1121650irq/29-eth0_g0_19:26:101
121750440irq/30-eth0_g0_121ksoftirqd/123:50:071
121650440irq/29-eth0_g0_13-21kworker/0:123:31:470
121440ksoftirqd/1121750irq/30-eth0_g0_22:57:311
121440ksoftirqd/1121650irq/29-eth0_g0_23:25:101
121440ksoftirqd/1121650irq/29-eth0_g0_20:57:511
121440ksoftirqd/1121650irq/29-eth0_g0_20:41:081
121440ksoftirqd/1121650irq/29-eth0_g0_20:41:081
121650430irq/29-eth0_g0_31ksoftirqd/021:16:090
121650430irq/29-eth0_g0_247482sleep122:25:311
121650430irq/29-eth0_g0_13-21kworker/0:121:21:510
121650430irq/29-eth0_g0_13-21kworker/0:121:21:510
121650430irq/29-eth0_g0_121ksoftirqd/122:45:021
121430ksoftirqd/1121750irq/30-eth0_g0_23:59:321
121430ksoftirqd/1121750irq/30-eth0_g0_20:20:100
121430ksoftirqd/1121650irq/29-eth0_g0_22:35:081
121430ksoftirqd/1121650irq/29-eth0_g0_00:29:031
847899421cyclictest24577-21df_abs20:14:571
121750420irq/30-eth0_g0_1219-21kworker/1:222:16:051
121650420irq/29-eth0_g0_31ksoftirqd/022:14:570
847899411cyclictest9190-21proc_pri23:35:051
847899411cyclictest18375-21awk22:00:081
121750410irq/30-eth0_g0_1219-21kworker/1:223:40:141
121650410irq/29-eth0_g0_31ksoftirqd/022:21:150
121650410irq/29-eth0_g0_1894-21runrttasks22:02:050
121650410irq/29-eth0_g0_1894-21runrttasks19:05:070
121650410irq/29-eth0_g0_13-21kworker/0:123:35:170
121650410irq/29-eth0_g0_13-21kworker/0:100:13:510
121410ksoftirqd/1121750irq/30-eth0_g0_21:12:110
847899402cyclictest3129-21/usr/sbin/munin20:59:571
847899401cyclictest23410-21unixbench_multi22:20:071
847899401cyclictest19759-21grep22:05:081
121750400irq/30-eth0_g0_1219-21kworker/1:223:19:111
121750400irq/30-eth0_g0_1219-21kworker/1:223:01:061
121750400irq/30-eth0_g0_121ksoftirqd/123:23:041
121650400irq/29-eth0_g0_304952sleep020:39:110
121650400irq/29-eth0_g0_20993-21grep22:10:080
121650400irq/29-eth0_g0_13-21kworker/0:123:41:220
121650400irq/29-eth0_g0_13-21kworker/0:123:03:440
121650400irq/29-eth0_g0_13-21kworker/0:122:59:250
121650400irq/29-eth0_g0_13-21kworker/0:122:40:480
121650400irq/29-eth0_g0_13-21kworker/0:122:36:520
121650400irq/29-eth0_g0_13-21kworker/0:122:29:530
121650400irq/29-eth0_g0_13-21kworker/0:122:24:470
121650400irq/29-eth0_g0_13-21kworker/0:121:25:020
121650400irq/29-eth0_g0_13-21kworker/0:100:09:050
121400ksoftirqd/1121650irq/29-eth0_g0_21:26:521
121400ksoftirqd/1121650irq/29-eth0_g0_21:07:561
847899397cyclictest121750irq/30-eth0_g0_21:21:491
847899397cyclictest121750irq/30-eth0_g0_21:21:491
847899391cyclictest29652-21sh20:35:031
219872390sleep0121650irq/29-eth0_g0_00:28:160
121750390irq/30-eth0_g0_1219-21kworker/1:221:12:361
121750390irq/30-eth0_g0_121ksoftirqd/100:33:101
121750390irq/30-eth0_g0_121ksoftirqd/100:21:381
121750390irq/30-eth0_g0_0-21swapper/121:36:421
121650390irq/29-eth0_g0_13-21kworker/0:123:47:410
121650390irq/29-eth0_g0_13-21kworker/0:123:47:410
121650390irq/29-eth0_g0_13-21kworker/0:123:16:390
121650390irq/29-eth0_g0_13-21kworker/0:123:05:240
121650390irq/29-eth0_g0_13-21kworker/0:122:44:560
121650390irq/29-eth0_g0_13-21kworker/0:122:05:380
121650390irq/29-eth0_g0_13-21kworker/0:121:56:140
121650390irq/29-eth0_g0_13-21kworker/0:100:39:240
121650390irq/29-eth0_g0_13-21kworker/0:100:39:240
121650390irq/29-eth0_g0_13-21kworker/0:100:17:080
121650390irq/29-eth0_g0_121ksoftirqd/121:52:130
121390ksoftirqd/1121650irq/29-eth0_g0_23:31:131
121390ksoftirqd/1121650irq/29-eth0_g0_20:30:121
121390ksoftirqd/1121650irq/29-eth0_g0_19:50:041
121390ksoftirqd/1121650irq/29-eth0_g0_19:50:041
847899382cyclictest26434-21awk20:20:111
146902380sleep0121650irq/29-eth0_g0_23:58:550
121750380irq/30-eth0_g0_1219-21kworker/1:222:50:541
121750380irq/30-eth0_g0_1219-21kworker/1:221:32:241
121750380irq/30-eth0_g0_0-21swapper/121:40:311
121650380irq/29-eth0_g0_7427-21taskset23:29:460
121650380irq/29-eth0_g0_31ksoftirqd/023:22:370
121650380irq/29-eth0_g0_31ksoftirqd/022:50:480
121650380irq/29-eth0_g0_2559-21unixbench_multi20:55:080
121650380irq/29-eth0_g0_1894-21runrttasks20:29:380
121650380irq/29-eth0_g0_13-21kworker/0:121:41:430
121650380irq/29-eth0_g0_13-21kworker/0:121:36:430
121380ksoftirqd/1121750irq/30-eth0_g0_20:10:540
847899372cyclictest17283-21sed19:44:581
847899371cyclictest14013-21wc19:30:071
121650370irq/29-eth0_g0_8947-21ntpdc19:10:010
121650370irq/29-eth0_g0_847699cyclictest00:30:040
121650370irq/29-eth0_g0_18980-21cat19:50:080
121650370irq/29-eth0_g0_18980-21cat19:50:080
121650370irq/29-eth0_g0_1894-21runrttasks19:30:560
121370ksoftirqd/1121750irq/30-eth0_g0_19:15:440
121370ksoftirqd/1121750irq/30-eth0_g0_19:15:440
847899361cyclictest638-21/usr/sbin/munin20:50:001
847899361cyclictest16125-21if_eth019:40:041
847899361cyclictest15084-21ntpdc19:35:021
847899361cyclictest11692-21processes23:45:061
847899361cyclictest11692-21processes23:45:061
847899361cyclictest10468-21grep19:15:091
847899361cyclictest10468-21grep19:15:091
121750360irq/30-eth0_g0_7251-21/usr/sbin/munin21:15:071
121750360irq/30-eth0_g0_1219-21kworker/1:200:02:191
121750360irq/30-eth0_g0_0-21swapper/100:13:031
121650360irq/29-eth0_g0_8104-21runrttasks19:05:351
121650360irq/29-eth0_g0_3801-21unixbench_singl21:00:080
121650360irq/29-eth0_g0_31181-21sendmail_mailst20:40:040
121650360irq/29-eth0_g0_31181-21sendmail_mailst20:40:040
121650360irq/29-eth0_g0_1894-21runrttasks20:18:510
121650360irq/29-eth0_g0_16511-21cat19:40:110
121650360irq/29-eth0_g0_14758-21/usr/sbin/munin19:34:570
121650360irq/29-eth0_g0_12407-21df_inode19:25:010
121360ksoftirqd/1121650irq/29-eth0_g0_20:11:351
847899351cyclictest11676-21grep19:20:101
121650350irq/29-eth0_g0_21998-21ls20:04:460
121650350irq/29-eth0_g0_19843-21taskset19:55:000
121650350irq/29-eth0_g0_1793-21taskset20:54:460
847899342cyclictest20897-21df_abs20:00:001
847899341cyclictest20260-21grep19:55:071
121650340irq/29-eth0_g0_11359-21seq19:20:040
847899331cyclictest0-21swapper/120:05:021
121750330irq/30-eth0_g0_9483-21runrttasks19:12:141
121650330irq/29-eth0_g0_847699cyclictest20:45:050
121650330irq/29-eth0_g0_28488-21cat20:30:020
121650320irq/29-eth0_g0_0-21swapper/019:44:590
121650310irq/29-eth0_g0_1219-21kworker/1:220:24:571
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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