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2026-03-26 - 00:26

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 Wed Mar 25, 2026 12:43:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1954721230sleep0121650irq/29-eth0_g0_10:40:430
2343021180sleep0121750irq/30-eth0_g0_10:58:170
2472121170sleep0121650irq/29-eth0_g0_11:04:050
878621020sleep1121750irq/30-eth0_g0_09:58:361
257962920sleep1121650irq/29-eth0_g0_11:07:201
257962920sleep1121650irq/29-eth0_g0_11:07:201
106702780chrt121650irq/29-eth0_g0_12:19:091
179802660sleep1121750irq/30-eth0_g0_08:23:491
189932610chrt121750irq/30-eth0_g0_10:40:111
121590ksoftirqd/1121750irq/30-eth0_g0_10:04:091
121560ksoftirqd/1121650irq/29-eth0_g0_12:27:310
121510ksoftirqd/1121750irq/30-eth0_g0_11:48:341
121510ksoftirqd/1121650irq/29-eth0_g0_09:55:130
121490ksoftirqd/1121750irq/30-eth0_g0_11:50:581
121490ksoftirqd/1121750irq/30-eth0_g0_11:50:581
121480ksoftirqd/1121750irq/30-eth0_g0_11:12:461
121480ksoftirqd/1121750irq/30-eth0_g0_08:10:210
121470ksoftirqd/1121750irq/30-eth0_g0_10:52:020
121470ksoftirqd/1121650irq/29-eth0_g0_11:03:401
121650460irq/29-eth0_g0_31ksoftirqd/009:35:140
121460ksoftirqd/1121650irq/29-eth0_g0_11:11:590
121750450irq/30-eth0_g0_1219-21kworker/1:210:37:061
121450ksoftirqd/1121650irq/29-eth0_g0_11:54:590
121450ksoftirqd/1121650irq/29-eth0_g0_11:54:590
121450ksoftirqd/1121650irq/29-eth0_g0_09:29:420
121440ksoftirqd/1121650irq/29-eth0_g0_11:32:021
3215499431cyclictest9006-21grep07:45:191
121750430irq/30-eth0_g0_1219-21kworker/1:210:29:271
121750430irq/30-eth0_g0_1219-21kworker/1:210:29:271
121750430irq/30-eth0_g0_1219-21kworker/1:209:10:031
121430ksoftirqd/1121750irq/30-eth0_g0_10:19:140
149402420sleep0121750irq/30-eth0_g0_10:24:070
121750420irq/30-eth0_g0_1219-21kworker/1:212:12:381
121750420irq/30-eth0_g0_1219-21kworker/1:212:05:421
121750420irq/30-eth0_g0_1219-21kworker/1:211:55:241
121650420irq/29-eth0_g0_31ksoftirqd/009:34:580
121650420irq/29-eth0_g0_0-21swapper/007:05:450
121650420irq/29-eth0_g0_0-21swapper/007:05:450
121750410irq/30-eth0_g0_1219-21kworker/1:212:02:371
121750410irq/30-eth0_g0_1219-21kworker/1:209:15:011
121650410irq/29-eth0_g0_31ksoftirqd/012:37:330
121650410irq/29-eth0_g0_31ksoftirqd/012:10:140
121650410irq/29-eth0_g0_13-21kworker/0:111:20:080
121650410irq/29-eth0_g0_13-21kworker/0:110:39:480
121410ksoftirqd/1121650irq/29-eth0_g0_09:37:481
32154994028cyclictest5036-21cat07:30:131
121750400irq/30-eth0_g0_1219-21kworker/1:209:46:441
121750400irq/30-eth0_g0_121ksoftirqd/111:18:011
121650400irq/29-eth0_g0_13-21kworker/0:112:07:040
121650400irq/29-eth0_g0_13-21kworker/0:111:44:390
121650400irq/29-eth0_g0_13-21kworker/0:111:38:010
121650400irq/29-eth0_g0_13-21kworker/0:111:17:240
121650400irq/29-eth0_g0_13-21kworker/0:110:28:080
121650400irq/29-eth0_g0_13-21kworker/0:110:28:080
121650400irq/29-eth0_g0_13-21kworker/0:109:45:250
121400ksoftirqd/1121750irq/30-eth0_g0_12:32:010
121400ksoftirqd/1121750irq/30-eth0_g0_10:01:390
121400ksoftirqd/1121750irq/30-eth0_g0_09:40:390
121400ksoftirqd/1121750irq/30-eth0_g0_08:35:110
121400ksoftirqd/1121650irq/29-eth0_g0_09:20:201
121400ksoftirqd/1121650irq/29-eth0_g0_09:20:201
3215499391cyclictest809-21chrt09:25:161
3215499391cyclictest18811-21tail08:25:211
3215499391cyclictest1497-21wc11:40:161
121750390irq/30-eth0_g0_1219-21kworker/1:212:32:471
121750390irq/30-eth0_g0_1219-21kworker/1:212:21:481
121750390irq/30-eth0_g0_1219-21kworker/1:211:27:291
121750390irq/30-eth0_g0_121ksoftirqd/110:56:181
121650390irq/29-eth0_g0_13-21kworker/0:109:15:150
121650390irq/29-eth0_g0_0-21swapper/010:13:510
121650390irq/29-eth0_g0_0-21swapper/009:23:100
121650390irq/29-eth0_g0_0-21swapper/009:23:100
121390ksoftirqd/1121750irq/30-eth0_g0_10:47:530
121390ksoftirqd/1121750irq/30-eth0_g0_10:30:530
121390ksoftirqd/1121750irq/30-eth0_g0_08:00:300
121390ksoftirqd/1121750irq/30-eth0_g0_07:31:480
3215499382cyclictest14504-21/usr/sbin/munin10:20:211
3215499381cyclictest6519-21/usr/sbin/munin07:35:191
3215499381cyclictest13420-21df_abs08:05:111
3215499381cyclictest1281-21wc07:15:141
3215499381cyclictest12146-21grep10:10:191
121750380irq/30-eth0_g0_121ksoftirqd/110:52:511
121650380irq/29-eth0_g0_30245-21proc_pri11:25:150
121650380irq/29-eth0_g0_27964-21/usr/sbin/munin09:05:120
121650380irq/29-eth0_g0_24546-21sort08:50:150
121650380irq/29-eth0_g0_1894-21/usr/sbin/munin08:50:101
121650380irq/29-eth0_g0_1875-21runrttasks07:57:240
121650380irq/29-eth0_g0_18726-21awk08:25:200
121650380irq/29-eth0_g0_13-21kworker/0:109:12:200
121650380irq/29-eth0_g0_121ksoftirqd/110:19:231
121650380irq/29-eth0_g0_11103-21latency12:20:120
121380ksoftirqd/16847-21memory09:50:131
121380ksoftirqd/1121750irq/30-eth0_g0_11:46:000
121380ksoftirqd/1121750irq/30-eth0_g0_09:51:100
3215499372cyclictest4321-21if_eth009:40:101
121750370irq/30-eth0_g0_1219-21kworker/1:210:45:121
121750370irq/30-eth0_g0_0-21swapper/112:26:061
121750370irq/30-eth0_g0_0-21swapper/109:30:241
121650370irq/29-eth0_g0_6327-21ntpdc07:35:150
121650370irq/29-eth0_g0_23772-21unixbench_singl08:45:220
121650370irq/29-eth0_g0_1875-21runrttasks08:40:460
121650370irq/29-eth0_g0_1875-21runrttasks07:42:500
121650370irq/29-eth0_g0_13412-21chrt08:05:110
121650370irq/29-eth0_g0_13-21kworker/0:112:19:310
121650370irq/29-eth0_g0_13-21kworker/0:111:56:140
121650370irq/29-eth0_g0_13-21kworker/0:111:30:340
121650370irq/29-eth0_g0_13-21kworker/0:111:06:000
121650370irq/29-eth0_g0_13-21kworker/0:111:06:000
3215499361cyclictest495-21unixbench_singl11:35:191
3215499361cyclictest29099-21diskmemload10:30:071
3215499361cyclictest28647-21unixbench_singl09:05:201
3215499361cyclictest24382sleep107:20:121
3215499361cyclictest22401-21sendmail_mailtr08:40:181
3215499361cyclictest16184-21proc_pri08:15:171
3215499361cyclictest10281-21df10:05:091
121750360irq/30-eth0_g0_121ksoftirqd/111:20:301
121650360irq/29-eth0_g0_6492-21awk12:00:170
121650360irq/29-eth0_g0_301-21/usr/sbin/munin07:10:180
121650360irq/29-eth0_g0_301-21/usr/sbin/munin07:10:180
121650360irq/29-eth0_g0_27105-21netstat09:00:140
121650360irq/29-eth0_g0_1875-21runrttasks08:55:220
121650360irq/29-eth0_g0_1875-21runrttasks07:29:380
121650360irq/29-eth0_g0_13-21kworker/0:110:06:110
121360ksoftirqd/131714-21/usr/sbin/munin07:05:181
121360ksoftirqd/131714-21/usr/sbin/munin07:05:181
121360ksoftirqd/1121750irq/30-eth0_g0_08:30:230
121360ksoftirqd/1121750irq/30-eth0_g0_08:30:230
121360ksoftirqd/1121750irq/30-eth0_g0_08:20:430
3215499351cyclictest9929-21missed_timers07:50:141
3215499351cyclictest3952-21ps07:25:161
3215499351cyclictest26042-21fgrep08:55:171
3215499351cyclictest0-21swapper/108:30:581
3215499351cyclictest0-21swapper/108:30:581
121750350irq/30-eth0_g0_21274-21grep08:35:191
121650350irq/29-eth0_g0_1875-21runrttasks07:51:060
121650350irq/29-eth0_g0_1875-21runrttasks07:23:380
121350ksoftirqd/1121750irq/30-eth0_g0_08:19:060
121350ksoftirqd/1121750irq/30-eth0_g0_07:49:150
3215499341cyclictest7764-21timerandwakeup07:40:191
3215499341cyclictest15129-21grep08:10:211
3215499341cyclictest12212-21taskset08:00:101
242482340sleep124199-21latency_hist08:49:591
121750340irq/30-eth0_g0_3215499cyclictest07:10:161
121750340irq/30-eth0_g0_3215499cyclictest07:10:161
121650340irq/29-eth0_g0_1875-21runrttasks07:19:320
121650340irq/29-eth0_g0_121ksoftirqd/112:37:411
32154993125cyclictest27375-21unixbench_multi09:00:191
121750310irq/30-eth0_g0_11130-21missed_timers07:55:131
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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