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2026-09-20 - 13:25

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 Sun Sep 20, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1211090ksoftirqd/1121750irq/30-eth0_g0_21:22:321
1211000ksoftirqd/1121750irq/30-eth0_g0_20:00:351
271262930sleep0121750irq/30-eth0_g0_22:53:560
121860ksoftirqd/1121750irq/30-eth0_g0_21:58:451
121770ksoftirqd/1121750irq/30-eth0_g0_23:17:011
121770ksoftirqd/1121750irq/30-eth0_g0_23:17:011
27252750sleep1121650irq/29-eth0_g0_21:14:521
317652700sleep0121650irq/29-eth0_g0_23:10:570
121690ksoftirqd/1121750irq/30-eth0_g0_00:07:451
121690ksoftirqd/1121750irq/30-eth0_g0_00:07:451
142292590sleep0121650irq/29-eth0_g0_00:13:100
121530ksoftirqd/1121750irq/30-eth0_g0_22:58:090
121500ksoftirqd/1121750irq/30-eth0_g0_23:42:111
121500ksoftirqd/1121750irq/30-eth0_g0_22:49:551
121500ksoftirqd/1121750irq/30-eth0_g0_00:11:121
121650480irq/29-eth0_g0_20443-21proc_pri22:25:320
121470ksoftirqd/1121750irq/30-eth0_g0_22:31:131
121470ksoftirqd/1121650irq/29-eth0_g0_21:38:440
44172450sleep0121650irq/29-eth0_g0_23:32:500
121750450irq/30-eth0_g0_186542sleep122:20:081
121450ksoftirqd/1121750irq/30-eth0_g0_21:16:101
121650440irq/29-eth0_g0_10201-21timerandwakeup23:55:370
121440ksoftirqd/1121750irq/30-eth0_g0_22:21:331
121750430irq/30-eth0_g0_29947-21chrt23:05:281
121750430irq/30-eth0_g0_1219-21kworker/1:222:50:521
121750430irq/30-eth0_g0_121ksoftirqd/123:01:041
121650430irq/29-eth0_g0_1964-21runrttasks00:26:370
121650430irq/29-eth0_g0_13-21kworker/0:123:52:140
121650430irq/29-eth0_g0_13-21kworker/0:122:32:110
121430ksoftirqd/1121750irq/30-eth0_g0_20:03:570
121430ksoftirqd/1121650irq/29-eth0_g0_23:34:061
121750420irq/30-eth0_g0_121ksoftirqd/100:23:101
121650420irq/29-eth0_g0_31ksoftirqd/023:40:170
121650420irq/29-eth0_g0_121ksoftirqd/121:50:271
121420ksoftirqd/1121650irq/29-eth0_g0_20:20:341
86242410sleep1121750irq/30-eth0_g0_21:37:171
133762410sleep0121650irq/29-eth0_g0_21:55:380
121750410irq/30-eth0_g0_121ksoftirqd/100:25:321
121650410irq/29-eth0_g0_62572sleep121:28:141
121650410irq/29-eth0_g0_31ksoftirqd/022:36:160
121650410irq/29-eth0_g0_31ksoftirqd/000:33:120
121650410irq/29-eth0_g0_13-21kworker/0:123:17:480
121650410irq/29-eth0_g0_13-21kworker/0:123:17:480
121650410irq/29-eth0_g0_13-21kworker/0:123:02:370
121410ksoftirqd/1121750irq/30-eth0_g0_00:23:380
121410ksoftirqd/1121650irq/29-eth0_g0_23:10:040
121410ksoftirqd/1121650irq/29-eth0_g0_21:30:351
336299401cyclictest18797-21chrt20:05:351
121750400irq/30-eth0_g0_31458-21proc_pri23:10:331
121750400irq/30-eth0_g0_2951-21awk19:00:371
121750400irq/30-eth0_g0_158712sleep122:06:111
121750400irq/30-eth0_g0_158712sleep122:06:111
121750400irq/30-eth0_g0_121ksoftirqd/122:58:511
121750400irq/30-eth0_g0_121ksoftirqd/100:04:391
121650400irq/29-eth0_g0_31ksoftirqd/021:08:470
121650400irq/29-eth0_g0_31ksoftirqd/000:15:360
121650400irq/29-eth0_g0_13-21kworker/0:123:47:310
121650400irq/29-eth0_g0_13-21kworker/0:123:25:430
121650400irq/29-eth0_g0_13-21kworker/0:123:23:300
121650400irq/29-eth0_g0_13-21kworker/0:122:45:290
121650400irq/29-eth0_g0_13-21kworker/0:122:40:260
121650400irq/29-eth0_g0_13-21kworker/0:122:40:260
121650400irq/29-eth0_g0_13-21kworker/0:122:13:180
121650400irq/29-eth0_g0_13-21kworker/0:121:51:060
121650400irq/29-eth0_g0_13-21kworker/0:121:47:370
121650400irq/29-eth0_g0_13-21kworker/0:121:43:580
121650400irq/29-eth0_g0_13-21kworker/0:121:43:580
121650400irq/29-eth0_g0_13-21kworker/0:121:10:400
121650400irq/29-eth0_g0_13-21kworker/0:100:10:070
121650400irq/29-eth0_g0_13-21kworker/0:100:10:070
121650400irq/29-eth0_g0_121ksoftirqd/122:25:241
121400ksoftirqd/1121750irq/30-eth0_g0_21:19:110
121400ksoftirqd/1121650irq/29-eth0_g0_23:50:471
336299391cyclictest16908-21timerandwakeup22:10:351
121750390irq/30-eth0_g0_1219-21kworker/1:222:43:401
121750390irq/30-eth0_g0_1219-21kworker/1:222:43:401
121750390irq/30-eth0_g0_1219-21kworker/1:200:19:121
121750390irq/30-eth0_g0_121ksoftirqd/122:40:001
121750390irq/30-eth0_g0_121ksoftirqd/121:40:271
121750390irq/30-eth0_g0_121ksoftirqd/121:40:271
121750390irq/30-eth0_g0_11334-21/usr/sbin/munin19:35:351
121650390irq/29-eth0_g0_1964-21runrttasks19:00:270
121650390irq/29-eth0_g0_14094-21taskset22:00:290
121650390irq/29-eth0_g0_13-21kworker/0:122:06:360
121650390irq/29-eth0_g0_13-21kworker/0:122:06:360
121650390irq/29-eth0_g0_13-21kworker/0:121:27:510
121390ksoftirqd/1121650irq/29-eth0_g0_20:45:471
121390ksoftirqd/1121650irq/29-eth0_g0_19:55:521
336299382cyclictest1309-21memory23:20:301
336299381cyclictest5356-21sed19:10:371
336299381cyclictest18692-21zcat00:30:371
121750380irq/30-eth0_g0_1983-21/usr/sbin/munin20:50:261
121750380irq/30-eth0_g0_1219-21kworker/1:221:49:421
121650380irq/29-eth0_g0_1964-21runrttasks20:08:430
121650380irq/29-eth0_g0_13-21kworker/0:121:30:460
121650380irq/29-eth0_g0_13-21kworker/0:121:25:120
121650380irq/29-eth0_g0_13-21kworker/0:100:01:520
121650380irq/29-eth0_g0_121ksoftirqd/123:48:071
121650380irq/29-eth0_g0_121ksoftirqd/123:36:130
121380ksoftirqd/1121650irq/29-eth0_g0_20:13:591
121380ksoftirqd/1121650irq/29-eth0_g0_19:42:111
121380ksoftirqd/1121650irq/29-eth0_g0_19:07:421
336299372cyclictest9476-21munin-run19:30:151
336299372cyclictest7746-21grep19:20:371
121750370irq/30-eth0_g0_27340-21unixbench_multi20:40:361
121750370irq/30-eth0_g0_1219-21kworker/1:223:39:301
121750370irq/30-eth0_g0_1219-21kworker/1:221:05:141
121650370irq/29-eth0_g0_1964-21runrttasks19:42:340
336299361cyclictest2819-21awk23:25:361
336299361cyclictest14416-21/usr/sbin/munin22:00:351
121750360irq/30-eth0_g0_21166-21ls20:15:381
121750360irq/30-eth0_g0_1219-21kworker/1:223:58:531
121650360irq/29-eth0_g0_7581-21wc19:20:350
121650360irq/29-eth0_g0_32275-21unixbench_singl21:00:360
121650360irq/29-eth0_g0_30777-21ntp_states20:55:340
121650360irq/29-eth0_g0_24170-21latency_hist20:30:140
121650360irq/29-eth0_g0_1964-21runrttasks19:49:590
121650360irq/29-eth0_g0_1964-21runrttasks19:29:540
121650360irq/29-eth0_g0_13-21kworker/0:122:24:070
121650360irq/29-eth0_g0_13-21kworker/0:122:15:200
121650360irq/29-eth0_g0_121ksoftirqd/120:31:261
121360ksoftirqd/1121650irq/29-eth0_g0_21:05:341
336299351cyclictest234132sleep120:25:321
336299351cyclictest2126-21lldpd19:19:211
336299351cyclictest15128-21unixbench_multi19:50:381
336299351cyclictest10101-21fgrep19:30:351
336299351cyclictest10101-21fgrep19:30:351
121650350irq/29-eth0_g0_29842-21grep20:50:370
121650350irq/29-eth0_g0_24642-21chrt20:30:320
121650350irq/29-eth0_g0_1964-21runrttasks20:44:440
121650350irq/29-eth0_g0_1964-21runrttasks19:17:470
121650350irq/29-eth0_g0_1964-21runrttasks19:12:030
121750340irq/30-eth0_g0_13770-21fgrep19:45:341
121650340irq/29-eth0_g0_20820-21irqstats20:15:320
121650340irq/29-eth0_g0_1964-21runrttasks20:24:040
121650340irq/29-eth0_g0_14848-21ntp_kernel_pll_19:50:330
121650340irq/29-eth0_g0_0-21swapper/019:05:360
121750330irq/30-eth0_g0_30777-21ntp_states20:55:341
121750330irq/30-eth0_g0_1958-21crond20:36:141
121650330irq/29-eth0_g0_9960-21ntp_offset19:30:320
121650330irq/29-eth0_g0_9960-21ntp_offset19:30:320
121650330irq/29-eth0_g0_28328-21/usr/sbin/munin20:45:300
121650330irq/29-eth0_g0_19625-21ls20:10:290
121650330irq/29-eth0_g0_16146-21proc_pri19:55:340
121650320irq/29-eth0_g0_26065-21chrt20:35:350
121650320irq/29-eth0_g0_11186-21grep19:35:330
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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