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2026-07-08 - 21:58

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 376 highest latencies:
System rack3slot5s.osadl.org (updated Wed Jul 08, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1303921350sleep1121650irq/29-eth0_g0_11:49:321
1303921350sleep1121650irq/29-eth0_g0_11:49:321
121810ksoftirqd/1121750irq/30-eth0_g0_10:23:031
240952670sleep1121650irq/29-eth0_g0_12:35:001
121670ksoftirqd/1120332chrt07:18:560
121660ksoftirqd/1121750irq/30-eth0_g0_12:23:380
96832640sleep1121750irq/30-eth0_g0_09:23:241
322042640sleep0121650irq/29-eth0_g0_10:57:090
197682600sleep1121750irq/30-eth0_g0_10:04:491
197682600sleep1121750irq/30-eth0_g0_10:04:491
121570ksoftirqd/1304242sleep010:48:280
76192530sleep1121750irq/30-eth0_g0_09:13:321
121530ksoftirqd/1121750irq/30-eth0_g0_11:54:281
121650520irq/29-eth0_g0_31ksoftirqd/008:03:310
121520ksoftirqd/1121650irq/29-eth0_g0_12:19:300
151192500sleep0121750irq/30-eth0_g0_09:47:400
121650500irq/29-eth0_g0_31ksoftirqd/009:08:280
135602480sleep1121650irq/29-eth0_g0_09:38:461
135602480sleep1121650irq/29-eth0_g0_09:38:461
121480ksoftirqd/1121750irq/30-eth0_g0_10:34:241
121470ksoftirqd/1121750irq/30-eth0_g0_09:09:311
121470ksoftirqd/1121650irq/29-eth0_g0_11:36:071
175212460sleep0121650irq/29-eth0_g0_09:57:100
121750460irq/30-eth0_g0_121ksoftirqd/110:23:301
121450ksoftirqd/1121650irq/29-eth0_g0_11:23:021
121450ksoftirqd/1121650irq/29-eth0_g0_08:39:141
121650440irq/29-eth0_g0_1964-21runrttasks10:40:340
121440ksoftirqd/18215-21unixbench_multi07:03:341
121440ksoftirqd/1121750irq/30-eth0_g0_09:53:351
121440ksoftirqd/1121650irq/29-eth0_g0_10:17:011
121440ksoftirqd/1121650irq/29-eth0_g0_08:15:021
121440ksoftirqd/1121650irq/29-eth0_g0_08:01:291
121430ksoftirqd/1121750irq/30-eth0_g0_11:54:590
94052420sleep0121750irq/30-eth0_g0_11:34:550
121750420irq/30-eth0_g0_31ksoftirqd/012:03:230
121750420irq/30-eth0_g0_1219-21kworker/1:211:29:131
121650420irq/29-eth0_g0_7588-21/usr/sbin/munin07:03:320
121650420irq/29-eth0_g0_31ksoftirqd/012:11:230
121650420irq/29-eth0_g0_31ksoftirqd/009:40:100
121650420irq/29-eth0_g0_31ksoftirqd/009:40:100
121420ksoftirqd/1121650irq/29-eth0_g0_09:48:471
121750410irq/30-eth0_g0_20470-21taskset12:20:331
121750410irq/30-eth0_g0_1219-21kworker/1:209:18:491
121650410irq/29-eth0_g0_31ksoftirqd/010:18:000
121650410irq/29-eth0_g0_13-21kworker/0:111:49:130
121650410irq/29-eth0_g0_13-21kworker/0:111:49:130
121650410irq/29-eth0_g0_10401-21tail11:38:320
121410ksoftirqd/1121750irq/30-eth0_g0_12:02:471
872999402cyclictest28355-21sort08:28:091
190792400sleep0121650irq/29-eth0_g0_10:03:210
190792400sleep0121650irq/29-eth0_g0_10:03:210
121750400irq/30-eth0_g0_1219-21kworker/1:212:28:201
121750400irq/30-eth0_g0_1219-21kworker/1:209:37:051
121750400irq/30-eth0_g0_0-21swapper/110:50:291
121650400irq/29-eth0_g0_7387-21ntp_offset09:13:280
121650400irq/29-eth0_g0_31ksoftirqd/012:16:270
121650400irq/29-eth0_g0_31ksoftirqd/009:33:280
121650400irq/29-eth0_g0_2625-21sendmail_mailqu08:53:300
121650400irq/29-eth0_g0_2625-21sendmail_mailqu08:53:300
121650400irq/29-eth0_g0_1964-21runrttasks09:21:480
121650400irq/29-eth0_g0_1964-21runrttasks08:35:390
121650400irq/29-eth0_g0_16404-21latency07:38:240
121650400irq/29-eth0_g0_13-21kworker/0:112:28:250
121650400irq/29-eth0_g0_13-21kworker/0:112:02:590
121650400irq/29-eth0_g0_13-21kworker/0:111:14:430
121650400irq/29-eth0_g0_13-21kworker/0:110:29:510
121400ksoftirqd/1121750irq/30-eth0_g0_10:11:530
121400ksoftirqd/1121650irq/29-eth0_g0_11:09:371
872999391cyclictest9494-21grep07:08:311
121750390irq/30-eth0_g0_28356-21taskset10:40:011
121750390irq/30-eth0_g0_25945-21runrttasks10:30:271
121750390irq/30-eth0_g0_1219-21kworker/1:211:00:411
121750390irq/30-eth0_g0_0-21swapper/110:55:291
121650390irq/29-eth0_g0_9556-21vmstat07:08:320
121650390irq/29-eth0_g0_31ksoftirqd/008:13:230
121650390irq/29-eth0_g0_13-21kworker/0:111:03:480
121650390irq/29-eth0_g0_13-21kworker/0:110:26:120
121650390irq/29-eth0_g0_121ksoftirqd/111:28:310
121650390irq/29-eth0_g0_0-21swapper/010:33:180
121390ksoftirqd/1121750irq/30-eth0_g0_11:45:060
121390ksoftirqd/1121750irq/30-eth0_g0_11:24:280
121390ksoftirqd/1121750irq/30-eth0_g0_11:22:420
121390ksoftirqd/1121750irq/30-eth0_g0_10:59:500
121390ksoftirqd/1121750irq/30-eth0_g0_10:20:280
121390ksoftirqd/1121750irq/30-eth0_g0_09:59:060
121390ksoftirqd/1121750irq/30-eth0_g0_09:25:560
121390ksoftirqd/1121750irq/30-eth0_g0_08:46:310
121390ksoftirqd/1121750irq/30-eth0_g0_08:30:080
121390ksoftirqd/1121750irq/30-eth0_g0_08:26:180
121390ksoftirqd/1121750irq/30-eth0_g0_08:21:110
121390ksoftirqd/1121750irq/30-eth0_g0_08:12:270
121390ksoftirqd/1121750irq/30-eth0_g0_08:00:540
121390ksoftirqd/1121750irq/30-eth0_g0_07:29:220
872999381cyclictest11374-21grep09:28:331
872999381cyclictest0-21swapper/112:08:281
121750380irq/30-eth0_g0_1219-21kworker/1:210:02:441
121650380irq/29-eth0_g0_31ksoftirqd/009:49:060
121650380irq/29-eth0_g0_13-21kworker/0:110:44:390
121380ksoftirqd/1121750irq/30-eth0_g0_11:13:050
121380ksoftirqd/1121750irq/30-eth0_g0_09:28:160
121380ksoftirqd/1121750irq/30-eth0_g0_07:27:090
121380ksoftirqd/1121750irq/30-eth0_g0_07:15:040
121380ksoftirqd/1121650irq/29-eth0_g0_09:46:251
872999372cyclictest14005-21memory07:28:251
872999371cyclictest5667-21diskmemload11:43:221
872999371cyclictest187772sleep107:48:221
872999371cyclictest15613-21grep07:33:311
872999371cyclictest1554-21/usr/sbin/munin11:03:261
121750370irq/30-eth0_g0_3874-21iostat11:13:231
121750370irq/30-eth0_g0_1219-21kworker/1:212:24:411
121750370irq/30-eth0_g0_1219-21kworker/1:212:17:291
121750370irq/30-eth0_g0_1219-21kworker/1:211:26:411
121750370irq/30-eth0_g0_1219-21kworker/1:210:11:281
121750370irq/30-eth0_g0_121ksoftirqd/112:06:191
121650370irq/29-eth0_g0_23875-21unixbench_multi12:33:290
121650370irq/29-eth0_g0_1964-21runrttasks09:01:560
121650370irq/29-eth0_g0_1964-21runrttasks07:43:140
121650370irq/29-eth0_g0_1964-21runrttasks07:43:140
121650370irq/29-eth0_g0_1964-21runrttasks07:36:280
121370ksoftirqd/1121650irq/29-eth0_g0_11:39:091
872999361cyclictest5001-21ps09:03:271
872999361cyclictest32717-21runrttasks08:43:311
872999361cyclictest29844-21seq08:33:231
872999361cyclictest26108-21taskset08:18:211
872999361cyclictest0-21swapper/107:53:181
121750360irq/30-eth0_g0_29092-21ntp_kernel_err10:43:241
121650360irq/29-eth0_g0_31409-21timerandwakeup08:38:290
121650360irq/29-eth0_g0_1964-21runrttasks09:05:170
121650360irq/29-eth0_g0_18851-21wc07:48:230
872999351cyclictest23494-21/usr/sbin/munin08:08:221
872999351cyclictest233322sleep108:07:221
872999351cyclictest166982sleep107:38:301
872999351cyclictest0-21swapper/107:24:141
121650350irq/29-eth0_g0_0-21swapper/007:53:140
872999341cyclictest29078-21seq08:28:281
872999341cyclictest1530-21grep08:48:311
872999341cyclictest0-21swapper/107:43:491
872999341cyclictest0-21swapper/107:43:491
40062340sleep1121750irq/30-eth0_g0_08:58:311
121650340irq/29-eth0_g0_1371-21/usr/sbin/munin08:48:290
872999331cyclictest112902sleep107:18:201
872999331cyclictest10111-21df_abs07:13:221
121330ksoftirqd/1121650irq/29-eth0_g0_08:53:321
121330ksoftirqd/1121650irq/29-eth0_g0_08:53:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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