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2026-08-01 - 18:22

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 Sat Aug 01, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1456421670sleep1121650irq/29-eth0_g0_10:56:031
1456421670sleep1121650irq/29-eth0_g0_10:56:031
30002660sleep0121650irq/29-eth0_g0_12:21:110
30002660sleep0121650irq/29-eth0_g0_12:21:110
295972540sleep1121650irq/29-eth0_g0_09:43:211
16422520sleep0121650irq/29-eth0_g0_12:14:520
219852510sleep0121650irq/29-eth0_g0_11:26:500
212532510sleep1121750irq/30-eth0_g0_09:11:141
151782500sleep1121750irq/30-eth0_g0_10:57:301
121500ksoftirqd/1121750irq/30-eth0_g0_11:52:261
121500ksoftirqd/1121750irq/30-eth0_g0_09:39:581
237922490sleep1121750irq/30-eth0_g0_09:22:111
23099994835cyclictest21817-21awk09:12:291
121650470irq/29-eth0_g0_1964-21runrttasks10:27:550
203492460sleep0121650irq/29-eth0_g0_11:17:340
121650460irq/29-eth0_g0_22587-21unixbench_multi07:02:320
121460ksoftirqd/1121650irq/29-eth0_g0_10:00:531
121750450irq/30-eth0_g0_121ksoftirqd/110:22:271
183142440sleep1121750irq/30-eth0_g0_11:11:551
121650440irq/29-eth0_g0_9986-21/usr/sbin/munin10:37:250
121650440irq/29-eth0_g0_55182sleep112:31:591
121650440irq/29-eth0_g0_31ksoftirqd/009:22:240
121650440irq/29-eth0_g0_13-21kworker/0:112:10:190
121440ksoftirqd/1121750irq/30-eth0_g0_10:47:120
121440ksoftirqd/1121650irq/29-eth0_g0_12:04:541
121440ksoftirqd/1121650irq/29-eth0_g0_11:36:141
121440ksoftirqd/1121650irq/29-eth0_g0_11:36:141
121650430irq/29-eth0_g0_31ksoftirqd/009:30:470
121650430irq/29-eth0_g0_13-21kworker/0:109:55:080
121750420irq/30-eth0_g0_16452-21processes11:02:321
121750420irq/30-eth0_g0_121ksoftirqd/110:39:251
121650420irq/29-eth0_g0_13-21kworker/0:109:57:340
2309999411cyclictest1227-21grep07:47:341
121750410irq/30-eth0_g0_121ksoftirqd/111:17:251
121750410irq/30-eth0_g0_121ksoftirqd/111:12:231
121750410irq/30-eth0_g0_121ksoftirqd/110:15:101
121650410irq/29-eth0_g0_31ksoftirqd/011:35:550
121650410irq/29-eth0_g0_31ksoftirqd/011:35:550
121650410irq/29-eth0_g0_27564-21unixbench_singl07:22:330
121650410irq/29-eth0_g0_13-21kworker/0:111:57:140
121410ksoftirqd/1121650irq/29-eth0_g0_11:56:320
2309999401cyclictest311542sleep109:52:121
2309999401cyclictest311542sleep109:52:121
2309999401cyclictest28176-21df07:27:251
2309999401cyclictest1877-21cat12:17:121
121750400irq/30-eth0_g0_20107-21diskmemload09:28:181
121750400irq/30-eth0_g0_1219-21kworker/1:210:43:591
121750400irq/30-eth0_g0_1219-21kworker/1:210:17:161
121750400irq/30-eth0_g0_1219-21kworker/1:210:04:191
121750400irq/30-eth0_g0_121ksoftirqd/109:36:361
121650400irq/29-eth0_g0_31ksoftirqd/010:52:260
121650400irq/29-eth0_g0_31ksoftirqd/010:52:260
121650400irq/29-eth0_g0_1964-21runrttasks11:42:120
121650400irq/29-eth0_g0_1964-21runrttasks10:47:370
121650400irq/29-eth0_g0_13-21kworker/0:112:31:250
121650400irq/29-eth0_g0_13-21kworker/0:112:24:350
121650400irq/29-eth0_g0_13-21kworker/0:111:50:490
121650400irq/29-eth0_g0_13-21kworker/0:111:08:170
121650400irq/29-eth0_g0_13-21kworker/0:110:25:190
121650400irq/29-eth0_g0_13-21kworker/0:110:11:420
121650400irq/29-eth0_g0_13-21kworker/0:109:20:070
121650400irq/29-eth0_g0_13-21kworker/0:109:07:260
121400ksoftirqd/1121650irq/29-eth0_g0_12:34:031
121400ksoftirqd/1121650irq/29-eth0_g0_12:34:031
2309999391cyclictest32074-21taskset07:42:271
2309999391cyclictest25217-21grep11:37:331
121750390irq/30-eth0_g0_1219-21kworker/1:211:46:541
121750390irq/30-eth0_g0_1219-21kworker/1:209:55:211
121750390irq/30-eth0_g0_121ksoftirqd/112:17:441
121750390irq/30-eth0_g0_121ksoftirqd/112:17:441
121750390irq/30-eth0_g0_121ksoftirqd/112:01:001
121750390irq/30-eth0_g0_121ksoftirqd/111:30:331
121750390irq/30-eth0_g0_121ksoftirqd/110:36:551
121750390irq/30-eth0_g0_121ksoftirqd/110:11:161
121650390irq/29-eth0_g0_4984-21seq08:02:350
121650390irq/29-eth0_g0_31ksoftirqd/010:17:280
121650390irq/29-eth0_g0_31ksoftirqd/007:27:280
121650390irq/29-eth0_g0_25087-21grep07:12:320
121650390irq/29-eth0_g0_19596-21latency_hist11:17:120
121650390irq/29-eth0_g0_16044-21df11:02:240
121650390irq/29-eth0_g0_13-21kworker/0:112:02:520
121650390irq/29-eth0_g0_13-21kworker/0:111:40:310
121650390irq/29-eth0_g0_13-21kworker/0:110:02:310
121650390irq/29-eth0_g0_13-21kworker/0:109:49:230
121650390irq/29-eth0_g0_13-21kworker/0:109:49:230
121650390irq/29-eth0_g0_13-21kworker/0:109:42:180
121650390irq/29-eth0_g0_13-21kworker/0:109:33:040
121650390irq/29-eth0_g0_121ksoftirqd/108:42:241
121650390irq/29-eth0_g0_11032-21unixbench_multi08:27:340
121390ksoftirqd/1121750irq/30-eth0_g0_10:36:560
121390ksoftirqd/1121750irq/30-eth0_g0_07:22:331
121390ksoftirqd/1121650irq/29-eth0_g0_08:22:341
2309999382cyclictest24571-21grep09:22:351
2309999381cyclictest5891-21ntpq08:07:311
2309999381cyclictest25644-21/usr/sbin/munin07:17:341
121750380irq/30-eth0_g0_1219-21kworker/1:210:48:511
121650380irq/29-eth0_g0_31ksoftirqd/008:22:290
121650380irq/29-eth0_g0_13-21kworker/0:112:36:370
121650380irq/29-eth0_g0_13-21kworker/0:112:36:370
121650380irq/29-eth0_g0_13-21kworker/0:111:00:070
121650380irq/29-eth0_g0_13-21kworker/0:109:40:570
121650380irq/29-eth0_g0_13-21kworker/0:109:16:490
121380ksoftirqd/132170-21grep12:07:271
121380ksoftirqd/1121650irq/29-eth0_g0_11:48:071
121380ksoftirqd/1121650irq/29-eth0_g0_10:30:051
121380ksoftirqd/1121650irq/29-eth0_g0_08:19:151
121750370irq/30-eth0_g0_22592-21unixbench_multi07:02:321
121750370irq/30-eth0_g0_1964-21runrttasks09:03:510
121750370irq/30-eth0_g0_121ksoftirqd/111:25:451
121650370irq/29-eth0_g0_4923-21latency_hist10:17:120
121650370irq/29-eth0_g0_23570-21ntpdc07:07:280
121650370irq/29-eth0_g0_20107-21diskmemload11:30:050
121650370irq/29-eth0_g0_1964-21runrttasks09:02:080
121650370irq/29-eth0_g0_1964-21runrttasks09:02:080
121650370irq/29-eth0_g0_16921-21ntpq08:52:300
121650370irq/29-eth0_g0_16921-21ntpq08:52:300
121650370irq/29-eth0_g0_12975-21df_abs08:37:240
2309999361cyclictest4459-21/usr/sbin/munin08:02:261
2309999361cyclictest30996-21open_inodes07:37:331
2309999361cyclictest30996-21open_inodes07:37:331
2309999361cyclictest18458-21grep08:57:351
2309999361cyclictest18458-21grep08:57:351
2309999361cyclictest12916-21sed08:37:241
2309999361cyclictest11859-21seq08:32:261
2309999361cyclictest0-21swapper/112:22:351
2309999361cyclictest0-21swapper/107:59:501
121650360irq/29-eth0_g0_950-21taskset07:47:310
121650360irq/29-eth0_g0_0-21swapper/008:12:120
121360ksoftirqd/1121750irq/30-eth0_g0_08:53:031
121360ksoftirqd/1121750irq/30-eth0_g0_08:53:031
2309999351cyclictest1964-21runrttasks07:14:111
2309999351cyclictest11025-21unixbench_multi08:27:341
121650350irq/29-eth0_g0_3501-21proc_pri07:57:320
121650350irq/29-eth0_g0_25801-21df_inode07:17:230
121650350irq/29-eth0_g0_16004-21unixbench_singl08:47:330
121650350irq/29-eth0_g0_14468-21ntp_states08:42:280
121650350irq/29-eth0_g0_12339-21vmstat08:32:340
2309999341cyclictest29706-21ntp_kernel_err07:32:291
2309999341cyclictest0-21swapper/107:07:541
121750340irq/30-eth0_g0_1964-21runrttasks08:49:481
121650340irq/29-eth0_g0_456-21latency_hist07:47:120
121650340irq/29-eth0_g0_31ksoftirqd/007:37:260
121650340irq/29-eth0_g0_31ksoftirqd/007:37:260
121650340irq/29-eth0_g0_2124-21missed_timers07:52:260
121340ksoftirqd/17320-21ls08:12:331
121340ksoftirqd/17320-21ls08:12:331
121650330irq/29-eth0_g0_8477-21sendmail_mailqu08:17:310
121650330irq/29-eth0_g0_29507-21awk07:32:250
121650320irq/29-eth0_g0_0-21swapper/109:02:331
121650320irq/29-eth0_g0_0-21swapper/008:12:220
121650320irq/29-eth0_g0_0-21swapper/008:12:220
2309999311cyclictest0-21swapper/107:52:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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