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2026-03-21 - 07:30

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 Mar 21, 2026 00:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2874521680sleep1121650irq/29-eth0_g0_21:27:511
433421630sleep1121650irq/29-eth0_g0_00:12:441
938721450sleep0121650irq/29-eth0_g0_00:34:300
994921240sleep0121750irq/30-eth0_g0_22:24:300
96562660sleep1121750irq/30-eth0_g0_20:09:491
121640ksoftirqd/1121750irq/30-eth0_g0_19:14:550
121520ksoftirqd/1121750irq/30-eth0_g0_22:27:041
312682510chrt121650irq/29-eth0_g0_21:38:431
121510ksoftirqd/1121750irq/30-eth0_g0_23:31:051
114592500sleep1121650irq/29-eth0_g0_22:29:461
121490ksoftirqd/1121750irq/30-eth0_g0_22:11:241
121480ksoftirqd/1121750irq/30-eth0_g0_23:40:041
85082470sleep1121750irq/30-eth0_g0_22:17:001
199022470sleep1121750irq/30-eth0_g0_23:04:441
121470ksoftirqd/1121750irq/30-eth0_g0_23:09:451
121470ksoftirqd/1121750irq/30-eth0_g0_23:09:451
121470ksoftirqd/1121750irq/30-eth0_g0_19:59:521
111102470sleep0121650irq/29-eth0_g0_22:28:470
121460ksoftirqd/1121750irq/30-eth0_g0_19:53:101
121460ksoftirqd/1121650irq/29-eth0_g0_21:46:230
121450ksoftirqd/1184022sleep022:58:080
121450ksoftirqd/1121650irq/29-eth0_g0_20:41:031
121750440irq/30-eth0_g0_470-21kworker/1:121:23:081
121750440irq/30-eth0_g0_470-21kworker/1:121:16:271
121650440irq/29-eth0_g0_2029-21runrttasks23:27:300
121650440irq/29-eth0_g0_13-21kworker/0:100:07:010
121440ksoftirqd/1121650irq/29-eth0_g0_23:19:521
121440ksoftirqd/1121650irq/29-eth0_g0_23:01:131
121440ksoftirqd/1121650irq/29-eth0_g0_22:39:450
121440ksoftirqd/1121650irq/29-eth0_g0_20:09:161
121440ksoftirqd/1121650irq/29-eth0_g0_20:09:161
121750430irq/30-eth0_g0_6638-21chrt00:21:011
121750430irq/30-eth0_g0_121ksoftirqd/121:44:591
121430ksoftirqd/1121650irq/29-eth0_g0_00:16:581
26988994228cyclictest18008-21df20:44:451
121750420irq/30-eth0_g0_470-21kworker/1:122:57:381
121750420irq/30-eth0_g0_470-21kworker/1:122:53:541
121750420irq/30-eth0_g0_470-21kworker/1:122:40:001
121650420irq/29-eth0_g0_31ksoftirqd/021:25:280
121650420irq/29-eth0_g0_31ksoftirqd/021:23:230
121650420irq/29-eth0_g0_13-21kworker/0:121:18:090
121420ksoftirqd/1121650irq/29-eth0_g0_23:52:531
121420ksoftirqd/1121650irq/29-eth0_g0_21:04:491
29482410sleep1121650irq/29-eth0_g0_00:05:521
121750410irq/30-eth0_g0_470-21kworker/1:123:29:151
121750410irq/30-eth0_g0_470-21kworker/1:122:23:371
121750410irq/30-eth0_g0_470-21kworker/1:122:02:491
121750410irq/30-eth0_g0_470-21kworker/1:100:00:291
121750410irq/30-eth0_g0_121ksoftirqd/121:57:331
121650410irq/29-eth0_g0_31ksoftirqd/021:58:040
121650410irq/29-eth0_g0_13-21kworker/0:123:13:570
121650410irq/29-eth0_g0_13-21kworker/0:123:13:570
121650410irq/29-eth0_g0_13-21kworker/0:122:53:370
121650410irq/29-eth0_g0_13-21kworker/0:122:30:550
121650410irq/29-eth0_g0_13-21kworker/0:122:01:240
121650410irq/29-eth0_g0_13-21kworker/0:121:34:320
121650410irq/29-eth0_g0_121ksoftirqd/100:34:531
121410ksoftirqd/1121750irq/30-eth0_g0_23:38:080
121750400irq/30-eth0_g0_470-21kworker/1:123:45:001
121650400irq/29-eth0_g0_31ksoftirqd/021:11:440
121650400irq/29-eth0_g0_31ksoftirqd/000:29:330
121650400irq/29-eth0_g0_23819-21missed_timers23:19:500
121650400irq/29-eth0_g0_2029-21runrttasks20:28:260
121650400irq/29-eth0_g0_2029-21runrttasks19:08:340
121650400irq/29-eth0_g0_13-21kworker/0:123:31:010
121650400irq/29-eth0_g0_13-21kworker/0:123:05:010
121650400irq/29-eth0_g0_13-21kworker/0:122:35:190
121650400irq/29-eth0_g0_13-21kworker/0:100:11:000
121400ksoftirqd/126071-21iostat19:04:491
121400ksoftirqd/1121750irq/30-eth0_g0_23:49:050
121400ksoftirqd/1121750irq/30-eth0_g0_19:23:110
121400ksoftirqd/1121650irq/29-eth0_g0_20:23:401
121400ksoftirqd/1121650irq/29-eth0_g0_19:41:211
121400ksoftirqd/1121650irq/29-eth0_g0_00:29:551
2698899392cyclictest12929-21/usr/sbin/munin22:34:521
2698899391cyclictest153282sleep122:44:501
121750390irq/30-eth0_g0_470-21kworker/1:123:58:461
121750390irq/30-eth0_g0_22586-21memory23:14:491
121650390irq/29-eth0_g0_2029-21runrttasks20:20:580
121650390irq/29-eth0_g0_2029-21runrttasks00:14:550
121650390irq/29-eth0_g0_1483-21sed23:59:570
121650390irq/29-eth0_g0_13-21kworker/0:123:57:390
121650390irq/29-eth0_g0_13-21kworker/0:122:47:390
121390ksoftirqd/1121750irq/30-eth0_g0_21:52:410
121390ksoftirqd/1121750irq/30-eth0_g0_20:50:420
121390ksoftirqd/1121750irq/30-eth0_g0_20:14:330
121390ksoftirqd/1121750irq/30-eth0_g0_00:22:440
121390ksoftirqd/1121650irq/29-eth0_g0_23:38:021
121390ksoftirqd/1121650irq/29-eth0_g0_19:27:271
121390ksoftirqd/1121650irq/29-eth0_g0_00:28:481
2698899382cyclictest27612-21sendmail_mailqu19:09:531
121750380irq/30-eth0_g0_470-21kworker/1:121:53:561
121750380irq/30-eth0_g0_0-21swapper/121:43:211
121650380irq/29-eth0_g0_31158-21load23:49:490
121650380irq/29-eth0_g0_13-21kworker/0:123:02:070
121650380irq/29-eth0_g0_0-21swapper/023:39:380
121380ksoftirqd/1121750irq/30-eth0_g0_22:16:550
121380ksoftirqd/1121750irq/30-eth0_g0_22:05:410
121380ksoftirqd/1121750irq/30-eth0_g0_21:36:160
121380ksoftirqd/1121750irq/30-eth0_g0_20:57:530
121380ksoftirqd/1121650irq/29-eth0_g0_21:33:251
121380ksoftirqd/1121650irq/29-eth0_g0_20:39:141
121380ksoftirqd/1121650irq/29-eth0_g0_19:36:571
2698899372cyclictest28988-21unixbench_singl19:14:561
2698899371cyclictest13114-21df20:24:461
121750370irq/30-eth0_g0_470-21kworker/1:121:13:001
121750370irq/30-eth0_g0_0-21swapper/119:54:501
121650370irq/29-eth0_g0_32671-21sed19:29:560
121650370irq/29-eth0_g0_31ksoftirqd/020:44:510
121650370irq/29-eth0_g0_2029-21runrttasks20:31:420
121650370irq/29-eth0_g0_1468-21unixbench_singl19:34:570
121650370irq/29-eth0_g0_13-21kworker/0:121:42:300
121650370irq/29-eth0_g0_13-21kworker/0:100:34:370
121370ksoftirqd/1121750irq/30-eth0_g0_23:15:380
2698899361cyclictest324302sleep119:29:531
2698899361cyclictest207822sleep120:54:501
2698899361cyclictest14708-21open_inodes20:29:521
121750360irq/30-eth0_g0_470-21kworker/1:122:04:441
121650360irq/29-eth0_g0_8837-21unixbench_singl20:04:580
121650360irq/29-eth0_g0_8837-21unixbench_singl20:04:580
121650360irq/29-eth0_g0_6288-21timerandwakeup19:54:560
121650360irq/29-eth0_g0_30983-21iostat19:24:480
121650360irq/29-eth0_g0_27209-21sed19:09:450
121650360irq/29-eth0_g0_23231-21awk21:04:500
121650360irq/29-eth0_g0_2029-21runrttasks19:45:270
121650360irq/29-eth0_g0_13-21kworker/0:122:09:500
121650360irq/29-eth0_g0_0-21swapper/020:39:460
2698899351cyclictest22022-21taskset20:59:521
2698899351cyclictest193312sleep120:49:461
121750350irq/30-eth0_g0_29962-21/usr/sbin/munin19:19:531
121650350irq/29-eth0_g0_2029-21runrttasks21:01:380
121650350irq/29-eth0_g0_2029-21runrttasks20:15:350
121650350irq/29-eth0_g0_2029-21runrttasks19:51:370
121650350irq/29-eth0_g0_2029-21runrttasks19:40:390
121650350irq/29-eth0_g0_15654-21df_inode20:34:470
121350ksoftirqd/1121650irq/29-eth0_g0_19:44:551
121650340irq/29-eth0_g0_0-21swapper/019:59:450
2698899331cyclictest109682sleep120:14:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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