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2026-09-01 - 14:08

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 Tue Sep 01, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1366721460sleep1121650irq/29-eth0_g0_09:16:031
121860ksoftirqd/1121650irq/29-eth0_g0_10:08:580
121850ksoftirqd/1121750irq/30-eth0_g0_11:06:130
121810ksoftirqd/1121750irq/30-eth0_g0_11:45:061
121680ksoftirqd/1121650irq/29-eth0_g0_10:37:530
121680ksoftirqd/1121650irq/29-eth0_g0_10:37:530
100712660sleep1121750irq/30-eth0_g0_09:01:111
121600ksoftirqd/1121750irq/30-eth0_g0_11:58:121
106402570chrt121650irq/29-eth0_g0_11:16:080
121550ksoftirqd/1121750irq/30-eth0_g0_09:25:351
121540ksoftirqd/1121750irq/30-eth0_g0_09:40:381
121530ksoftirqd/1121750irq/30-eth0_g0_09:06:461
121650490irq/29-eth0_g0_121ksoftirqd/108:41:091
121490ksoftirqd/1121750irq/30-eth0_g0_09:42:081
121490ksoftirqd/1121750irq/30-eth0_g0_09:42:081
121750480irq/30-eth0_g0_1219-21kworker/1:212:21:081
121650470irq/29-eth0_g0_31ksoftirqd/009:43:560
121650470irq/29-eth0_g0_31ksoftirqd/009:43:560
121650470irq/29-eth0_g0_215562sleep012:00:510
121470ksoftirqd/1121650irq/29-eth0_g0_12:11:081
146812450sleep1121750irq/30-eth0_g0_07:06:131
121450ksoftirqd/1121750irq/30-eth0_g0_12:25:570
121650440irq/29-eth0_g0_121ksoftirqd/111:03:410
121440ksoftirqd/1121750irq/30-eth0_g0_10:01:361
121440ksoftirqd/1121650irq/29-eth0_g0_07:51:171
121440ksoftirqd/1121650irq/29-eth0_g0_07:51:171
121750430irq/30-eth0_g0_1219-21kworker/1:209:26:431
121430ksoftirqd/1121750irq/30-eth0_g0_11:29:490
121430ksoftirqd/1121650irq/29-eth0_g0_11:24:540
121750420irq/30-eth0_g0_1219-21kworker/1:212:30:441
121750420irq/30-eth0_g0_1219-21kworker/1:211:26:351
121750420irq/30-eth0_g0_1219-21kworker/1:210:34:001
121750420irq/30-eth0_g0_1219-21kworker/1:209:32:321
121750420irq/30-eth0_g0_1219-21kworker/1:209:11:101
121650420irq/29-eth0_g0_31ksoftirqd/010:26:100
121650420irq/29-eth0_g0_29821-21iostat10:21:120
121650420irq/29-eth0_g0_1964-21runrttasks07:04:250
121650420irq/29-eth0_g0_13-21kworker/0:110:51:170
121650420irq/29-eth0_g0_13-21kworker/0:109:36:100
121750410irq/30-eth0_g0_1219-21kworker/1:210:38:061
121750410irq/30-eth0_g0_1219-21kworker/1:210:38:061
121650410irq/29-eth0_g0_17286-21sendmail_mailqu07:16:190
121650410irq/29-eth0_g0_13-21kworker/0:110:45:510
121410ksoftirqd/1121750irq/30-eth0_g0_12:10:250
121410ksoftirqd/1121750irq/30-eth0_g0_12:10:250
121410ksoftirqd/1121650irq/29-eth0_g0_10:23:011
121750400irq/30-eth0_g0_13603-21sendmail_mailqu07:01:181
121750400irq/30-eth0_g0_1219-21kworker/1:211:31:121
121750400irq/30-eth0_g0_1219-21kworker/1:211:31:121
121750400irq/30-eth0_g0_1219-21kworker/1:210:52:251
121750400irq/30-eth0_g0_1219-21kworker/1:210:12:551
121750400irq/30-eth0_g0_121ksoftirqd/111:39:581
121750400irq/30-eth0_g0_121ksoftirqd/111:00:551
121650400irq/29-eth0_g0_31339-21latency_hist08:15:580
121650400irq/29-eth0_g0_23855-21/usr/sbin/munin09:56:150
121650400irq/29-eth0_g0_1964-21runrttasks10:48:060
121650400irq/29-eth0_g0_1964-21runrttasks10:02:310
121650400irq/29-eth0_g0_1964-21runrttasks07:50:000
121650400irq/29-eth0_g0_1964-21runrttasks07:40:080
121650400irq/29-eth0_g0_13-21kworker/0:112:12:070
121650400irq/29-eth0_g0_13-21kworker/0:111:42:220
121650400irq/29-eth0_g0_13-21kworker/0:111:14:530
121650400irq/29-eth0_g0_13-21kworker/0:110:34:420
121650400irq/29-eth0_g0_13-21kworker/0:110:10:590
121650400irq/29-eth0_g0_13-21kworker/0:109:50:020
121650400irq/29-eth0_g0_13-21kworker/0:109:35:160
121650400irq/29-eth0_g0_13-21kworker/0:109:27:400
121650400irq/29-eth0_g0_13-21kworker/0:109:25:000
121400ksoftirqd/1121650irq/29-eth0_g0_09:55:091
121400ksoftirqd/1121650irq/29-eth0_g0_08:33:531
1421599391cyclictest13026-21cat11:25:581
121750390irq/30-eth0_g0_121ksoftirqd/112:03:591
121750390irq/30-eth0_g0_121ksoftirqd/109:48:541
121750390irq/30-eth0_g0_0-21swapper/111:13:061
121650390irq/29-eth0_g0_31ksoftirqd/009:20:280
121650390irq/29-eth0_g0_31ksoftirqd/008:41:170
121650390irq/29-eth0_g0_28555-21awk10:16:090
121650390irq/29-eth0_g0_27815-21cpu12:26:090
121650390irq/29-eth0_g0_14552-21irqstats11:31:120
121650390irq/29-eth0_g0_14552-21irqstats11:31:120
121650390irq/29-eth0_g0_13-21kworker/0:112:19:330
121650390irq/29-eth0_g0_121ksoftirqd/108:22:241
121650390irq/29-eth0_g0_0-21swapper/012:00:590
121390ksoftirqd/1121750irq/30-eth0_g0_08:17:070
121390ksoftirqd/1121750irq/30-eth0_g0_07:54:340
121390ksoftirqd/1121750irq/30-eth0_g0_07:54:340
121390ksoftirqd/1121750irq/30-eth0_g0_07:45:100
121390ksoftirqd/1121750irq/30-eth0_g0_07:11:300
121390ksoftirqd/1121650irq/29-eth0_g0_11:55:191
121390ksoftirqd/1121650irq/29-eth0_g0_10:16:061
121390ksoftirqd/1121650irq/29-eth0_g0_10:00:341
121390ksoftirqd/1121650irq/29-eth0_g0_07:48:131
1421599385cyclictest121750irq/30-eth0_g0_12:17:491
1421599381cyclictest17219-21grep07:16:181
121750380irq/30-eth0_g0_121ksoftirqd/111:10:231
121750380irq/30-eth0_g0_121ksoftirqd/110:42:401
121650380irq/29-eth0_g0_31ksoftirqd/011:52:150
121650380irq/29-eth0_g0_22394-21df_inode09:51:090
121650380irq/29-eth0_g0_20979-21sendmail_mailtr07:31:190
121650380irq/29-eth0_g0_1964-21runrttasks08:40:070
121650380irq/29-eth0_g0_13-21kworker/0:111:39:110
121650380irq/29-eth0_g0_13-21kworker/0:111:00:250
121650380irq/29-eth0_g0_13-21kworker/0:109:13:570
121650380irq/29-eth0_g0_13-21kworker/0:109:06:270
121650380irq/29-eth0_g0_121ksoftirqd/111:16:041
121380ksoftirqd/1121650irq/29-eth0_g0_12:33:051
121380ksoftirqd/1121650irq/29-eth0_g0_11:49:171
121380ksoftirqd/1121650irq/29-eth0_g0_08:26:351
121380ksoftirqd/1121650irq/29-eth0_g0_08:14:051
121380ksoftirqd/1121650irq/29-eth0_g0_07:23:061
1421599372cyclictest7555-21taskset11:01:201
1421599372cyclictest26172-21sort10:06:121
1421599372cyclictest19717-21ps07:26:171
121750370irq/30-eth0_g0_1219-21kworker/1:210:49:121
121650370irq/29-eth0_g0_1964-21runrttasks08:22:220
121650370irq/29-eth0_g0_1811-21ntpdc08:26:160
121650370irq/29-eth0_g0_13-21kworker/0:111:50:130
121650370irq/29-eth0_g0_121ksoftirqd/110:28:541
1421599362cyclictest281532sleep108:01:141
1421599361cyclictest0-21swapper/108:20:581
121750360irq/30-eth0_g0_23238-21netstat07:41:151
121750360irq/30-eth0_g0_16166-21sed07:11:191
121750360irq/30-eth0_g0_1219-21kworker/1:212:06:381
121750360irq/30-eth0_g0_1219-21kworker/1:212:06:381
121650360irq/29-eth0_g0_8716-21taskset08:55:580
121650360irq/29-eth0_g0_26667-21sed07:56:090
121650360irq/29-eth0_g0_1964-21runrttasks07:07:400
121650360irq/29-eth0_g0_13-21kworker/0:112:31:400
121360ksoftirqd/1121650irq/29-eth0_g0_08:07:351
1421599351cyclictest8781-21/usr/sbin/munin08:56:151
1421599351cyclictest26959-21open_inodes07:56:171
121750350irq/30-eth0_g0_20660-21irqstats07:31:131
121650350irq/29-eth0_g0_8850-21grep08:56:080
121650350irq/29-eth0_g0_3326-21unixbench_multi08:31:200
121650350irq/29-eth0_g0_1964-21runrttasks08:04:300
121650350irq/29-eth0_g0_18365-21chrt07:21:140
121350ksoftirqd/1121650irq/29-eth0_g0_08:47:191
1421599342cyclictest22777-21munin-run07:40:581
121650340irq/29-eth0_g0_6372-21cpu08:46:090
121650340irq/29-eth0_g0_1964-21runrttasks09:01:590
121650340irq/29-eth0_g0_1964-21runrttasks07:28:130
121340ksoftirqd/1121650irq/29-eth0_g0_08:36:181
121650330irq/29-eth0_g0_0-21swapper/008:06:120
121650320irq/29-eth0_g0_7558-21/usr/sbin/munin08:51:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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