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2026-06-01 - 11:14

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 Mon Jun 01, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211340ksoftirqd/1121750irq/30-eth0_g0_22:23:101
1211010ksoftirqd/1121750irq/30-eth0_g0_19:24:321
121740ksoftirqd/1121750irq/30-eth0_g0_22:07:081
121740ksoftirqd/1121750irq/30-eth0_g0_22:07:081
321392590sleep1121750irq/30-eth0_g0_23:12:571
133912540sleep0121750irq/30-eth0_g0_21:55:010
121510ksoftirqd/1121750irq/30-eth0_g0_21:39:351
136582500sleep1121750irq/30-eth0_g0_21:56:491
121500ksoftirqd/1121750irq/30-eth0_g0_00:32:221
121490ksoftirqd/1121750irq/30-eth0_g0_23:24:251
121490ksoftirqd/1121750irq/30-eth0_g0_22:35:591
121490ksoftirqd/1121750irq/30-eth0_g0_20:39:561
121490ksoftirqd/1121650irq/29-eth0_g0_21:24:101
121480ksoftirqd/1121750irq/30-eth0_g0_21:27:181
121470ksoftirqd/1121750irq/30-eth0_g0_23:05:281
121470ksoftirqd/1121750irq/30-eth0_g0_22:55:371
121470ksoftirqd/1121650irq/29-eth0_g0_00:06:371
121460ksoftirqd/1121650irq/29-eth0_g0_22:44:510
121450ksoftirqd/1121750irq/30-eth0_g0_23:40:390
121450ksoftirqd/1121750irq/30-eth0_g0_23:40:390
121450ksoftirqd/1121750irq/30-eth0_g0_23:26:291
121450ksoftirqd/1121650irq/29-eth0_g0_00:21:210
121750440irq/30-eth0_g0_1219-21kworker/1:200:00:061
121440ksoftirqd/1121750irq/30-eth0_g0_21:32:121
121650430irq/29-eth0_g0_4627-21cyclictest19:09:390
121650430irq/29-eth0_g0_121ksoftirqd/122:13:030
121650430irq/29-eth0_g0_106562chrt21:44:550
121430ksoftirqd/1121750irq/30-eth0_g0_22:03:021
121750420irq/30-eth0_g0_1219-21kworker/1:223:50:291
121420ksoftirqd/141350irq/23-fsldma-c00:15:011
462999412cyclictest11386-21sendmail_mailqu19:34:581
121750410irq/30-eth0_g0_16682-21irqstats22:09:541
121750410irq/30-eth0_g0_1219-21kworker/1:221:46:181
121750410irq/30-eth0_g0_1219-21kworker/1:200:22:461
121650410irq/29-eth0_g0_629-21unixbench_singl23:15:000
121650410irq/29-eth0_g0_30219-21/usr/sbin/munin23:04:540
121650410irq/29-eth0_g0_31ksoftirqd/022:55:150
121650410irq/29-eth0_g0_31ksoftirqd/000:36:490
121650410irq/29-eth0_g0_19506-21df_abs20:09:530
121650410irq/29-eth0_g0_13-21kworker/0:121:27:410
121650410irq/29-eth0_g0_13-21kworker/0:100:13:350
121410ksoftirqd/1121650irq/29-eth0_g0_22:08:380
121410ksoftirqd/1121650irq/29-eth0_g0_22:08:380
121750400irq/30-eth0_g0_1219-21kworker/1:222:17:461
121750400irq/30-eth0_g0_121ksoftirqd/122:40:531
121750400irq/30-eth0_g0_121ksoftirqd/121:12:051
121750400irq/30-eth0_g0_121ksoftirqd/121:12:051
121650400irq/29-eth0_g0_1964-21runrttasks20:49:550
121650400irq/29-eth0_g0_1621-21diskmemload22:52:280
121650400irq/29-eth0_g0_1621-21diskmemload22:52:280
121650400irq/29-eth0_g0_13-21kworker/0:123:00:210
121650400irq/29-eth0_g0_13-21kworker/0:122:27:250
121650400irq/29-eth0_g0_13-21kworker/0:122:15:570
121650400irq/29-eth0_g0_13-21kworker/0:121:50:410
121650400irq/29-eth0_g0_13-21kworker/0:100:30:430
121650400irq/29-eth0_g0_11241-21ntp_offset19:34:550
121400ksoftirqd/1121750irq/30-eth0_g0_00:15:430
121400ksoftirqd/1121650irq/29-eth0_g0_22:53:081
121400ksoftirqd/1121650irq/29-eth0_g0_22:53:081
121400ksoftirqd/1121650irq/29-eth0_g0_22:29:531
462999391cyclictest13414-21head00:09:571
121750390irq/30-eth0_g0_1219-21kworker/1:222:47:081
121750390irq/30-eth0_g0_1219-21kworker/1:221:44:101
121750390irq/30-eth0_g0_1219-21kworker/1:200:37:361
121750390irq/30-eth0_g0_121ksoftirqd/121:50:211
121650390irq/29-eth0_g0_4827-21unixbench_multi21:20:000
121650390irq/29-eth0_g0_1964-21runrttasks23:21:020
121650390irq/29-eth0_g0_1964-21runrttasks23:11:540
121650390irq/29-eth0_g0_13-21kworker/0:122:02:030
121650390irq/29-eth0_g0_13-21kworker/0:121:41:110
121390ksoftirqd/1121750irq/30-eth0_g0_23:58:230
121390ksoftirqd/1121750irq/30-eth0_g0_23:47:320
121390ksoftirqd/1121750irq/30-eth0_g0_23:38:140
121390ksoftirqd/1121750irq/30-eth0_g0_23:27:230
121390ksoftirqd/1121750irq/30-eth0_g0_22:40:450
121390ksoftirqd/1121750irq/30-eth0_g0_22:32:580
121390ksoftirqd/1121750irq/30-eth0_g0_21:38:190
121390ksoftirqd/1121750irq/30-eth0_g0_21:33:340
121390ksoftirqd/1121750irq/30-eth0_g0_21:10:470
121390ksoftirqd/1121750irq/30-eth0_g0_21:10:470
121390ksoftirqd/1121750irq/30-eth0_g0_20:45:320
121390ksoftirqd/1121750irq/30-eth0_g0_20:45:320
121390ksoftirqd/1121750irq/30-eth0_g0_19:43:460
121390ksoftirqd/1121750irq/30-eth0_g0_19:23:130
121390ksoftirqd/1121750irq/30-eth0_g0_00:28:410
121390ksoftirqd/1121750irq/30-eth0_g0_00:07:590
121390ksoftirqd/1121750irq/30-eth0_g0_00:02:250
121390ksoftirqd/1121650irq/29-eth0_g0_19:24:591
462999381cyclictest4937-21taskset23:34:501
462999381cyclictest16796-21awk00:24:561
462999381cyclictest14500-21sort19:49:401
121750380irq/30-eth0_g0_1964-21runrttasks19:08:161
121750380irq/30-eth0_g0_121ksoftirqd/123:32:351
121650380irq/29-eth0_g0_22212-21missed_timers20:19:560
121650380irq/29-eth0_g0_13-21kworker/0:122:34:460
121380ksoftirqd/1121750irq/30-eth0_g0_23:39:531
121380ksoftirqd/1121750irq/30-eth0_g0_23:39:531
121380ksoftirqd/1121750irq/30-eth0_g0_22:23:570
121380ksoftirqd/1121750irq/30-eth0_g0_21:14:460
462999372cyclictest254712sleep120:34:391
462999371cyclictest30929-21ps20:54:571
462999371cyclictest14531-21/usr/sbin/munin19:49:511
462999371cyclictest14531-21/usr/sbin/munin19:49:511
462999371cyclictest10318-21sed19:30:011
121750370irq/30-eth0_g0_1219-21kworker/1:223:56:541
121750370irq/30-eth0_g0_1219-21kworker/1:223:46:251
121750370irq/30-eth0_g0_1219-21kworker/1:223:17:461
121750370irq/30-eth0_g0_1219-21kworker/1:222:25:531
121650370irq/29-eth0_g0_6326-21ntpdc19:14:570
121650370irq/29-eth0_g0_26251-21unixbench_singl20:35:000
121650370irq/29-eth0_g0_1964-21runrttasks20:40:270
121650370irq/29-eth0_g0_13-21kworker/0:123:50:010
121650370irq/29-eth0_g0_13-21kworker/0:123:33:360
462999361cyclictest1621-21diskmemload23:02:221
462999361cyclictest0-21swapper/119:17:321
121750360irq/30-eth0_g0_32380-21grep21:00:001
121650360irq/29-eth0_g0_30467-21/usr/sbin/munin20:54:550
121650360irq/29-eth0_g0_24553-21interrupts20:29:520
121650360irq/29-eth0_g0_1964-21runrttasks20:28:250
462999351cyclictest31732sleep121:14:551
462999351cyclictest29518-21cat20:49:551
462999351cyclictest280762sleep120:44:511
462999351cyclictest280762sleep120:44:511
462999351cyclictest237752sleep120:25:011
121650350irq/29-eth0_g0_9543-21wc19:29:390
121650350irq/29-eth0_g0_31824-21df_abs20:59:500
121650350irq/29-eth0_g0_1964-21runrttasks20:16:060
121650350irq/29-eth0_g0_16398-21unixbench_multi19:54:590
121650350irq/29-eth0_g0_15089-21awk19:50:010
121650350irq/29-eth0_g0_15089-21awk19:50:010
121350ksoftirqd/1121750irq/30-eth0_g0_20:13:281
121350ksoftirqd/1121750irq/30-eth0_g0_19:48:150
121350ksoftirqd/1121650irq/29-eth0_g0_19:09:571
462999341cyclictest12078-21/usr/sbin/munin19:39:561
121750340irq/30-eth0_g0_22184-21memory20:19:561
121650340irq/29-eth0_g0_5114-21runrttasks19:09:540
121650340irq/29-eth0_g0_1652-21latency_hist21:09:390
121650340irq/29-eth0_g0_10704-21runrttasks19:34:010
121340ksoftirqd/1121750irq/30-eth0_g0_20:05:420
462999331cyclictest0-21swapper/120:38:531
462999330cyclictest0-21swapper/120:08:251
121650330irq/29-eth0_g0_18149-21cat20:04:390
462999321cyclictest0-21swapper/119:54:581
462999311cyclictest21498-21sshd20:16:131
121750310irq/30-eth0_g0_0-21swapper/121:04:521
121750300irq/30-eth0_g0_17111-21df_abs19:59:521
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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