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2026-08-25 - 14:04

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 Tue Aug 25, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3204821480sleep1121750irq/30-eth0_g0_12:17:151
2245921350sleep1121650irq/29-eth0_g0_11:39:501
1211150ksoftirqd/1121750irq/30-eth0_g0_10:01:331
71362770sleep1121750irq/30-eth0_g0_10:36:321
71362770sleep1121750irq/30-eth0_g0_10:36:321
24192550sleep1121650irq/29-eth0_g0_12:31:131
121520ksoftirqd/1121750irq/30-eth0_g0_10:34:220
121520ksoftirqd/1121750irq/30-eth0_g0_09:32:431
39592500sleep1121750irq/30-eth0_g0_10:23:211
121500ksoftirqd/1121750irq/30-eth0_g0_10:30:511
121500ksoftirqd/1121750irq/30-eth0_g0_08:07:181
121500ksoftirqd/1121750irq/30-eth0_g0_08:07:181
121490ksoftirqd/1121750irq/30-eth0_g0_09:44:351
121490ksoftirqd/1121750irq/30-eth0_g0_09:44:351
121480ksoftirqd/1121750irq/30-eth0_g0_12:32:011
121650470irq/29-eth0_g0_31ksoftirqd/009:41:330
121650470irq/29-eth0_g0_31ksoftirqd/009:41:330
121470ksoftirqd/1121650irq/29-eth0_g0_08:05:431
298422460sleep1121750irq/30-eth0_g0_07:46:141
121650460irq/29-eth0_g0_31ksoftirqd/008:16:290
121460ksoftirqd/1121750irq/30-eth0_g0_09:54:140
121460ksoftirqd/1121650irq/29-eth0_g0_10:58:451
121460ksoftirqd/1121650irq/29-eth0_g0_10:49:061
121460ksoftirqd/1121650irq/29-eth0_g0_07:20:091
121460ksoftirqd/1121650irq/29-eth0_g0_07:20:091
121450ksoftirqd/1121750irq/30-eth0_g0_11:26:121
121450ksoftirqd/1121750irq/30-eth0_g0_10:54:151
121450ksoftirqd/1121750irq/30-eth0_g0_10:17:061
121450ksoftirqd/1121750irq/30-eth0_g0_10:17:061
121450ksoftirqd/1121750irq/30-eth0_g0_09:53:121
121450ksoftirqd/1121650irq/29-eth0_g0_07:39:231
121450ksoftirqd/1121650irq/29-eth0_g0_07:01:291
121650440irq/29-eth0_g0_19595-21grep07:01:350
121440ksoftirqd/1121750irq/30-eth0_g0_11:31:241
121440ksoftirqd/1121650irq/29-eth0_g0_12:27:390
121750430irq/30-eth0_g0_121ksoftirqd/110:31:331
121430ksoftirqd/1121650irq/29-eth0_g0_10:53:260
121650420irq/29-eth0_g0_31ksoftirqd/011:43:460
121650420irq/29-eth0_g0_16622-21vmstat09:01:370
121650420irq/29-eth0_g0_121ksoftirqd/112:16:550
121650410irq/29-eth0_g0_31ksoftirqd/011:16:340
121650410irq/29-eth0_g0_13-21kworker/0:110:16:140
121650410irq/29-eth0_g0_11800-21df_inode10:56:270
121750400irq/30-eth0_g0_121ksoftirqd/110:15:311
121650400irq/29-eth0_g0_31ksoftirqd/011:21:310
121650400irq/29-eth0_g0_31ksoftirqd/009:09:180
121650400irq/29-eth0_g0_31ksoftirqd/009:09:180
121650400irq/29-eth0_g0_22594-21timerandwakeup09:26:360
121650400irq/29-eth0_g0_13-21kworker/0:112:34:540
121650400irq/29-eth0_g0_13-21kworker/0:111:32:350
121650400irq/29-eth0_g0_13-21kworker/0:111:09:060
121650400irq/29-eth0_g0_13-21kworker/0:110:38:480
121650400irq/29-eth0_g0_13-21kworker/0:110:38:480
121650400irq/29-eth0_g0_13-21kworker/0:110:09:220
121650400irq/29-eth0_g0_13-21kworker/0:109:19:360
121400ksoftirqd/1121750irq/30-eth0_g0_08:01:340
121400ksoftirqd/1121650irq/29-eth0_g0_07:11:291
2004699391cyclictest3072sleep112:21:291
2004699391cyclictest20302-21vmstat09:16:371
137862390sleep1121650irq/29-eth0_g0_11:03:451
121750390irq/30-eth0_g0_31ksoftirqd/012:00:100
121750390irq/30-eth0_g0_1219-21kworker/1:209:59:041
121750390irq/30-eth0_g0_121ksoftirqd/109:48:141
121750390irq/30-eth0_g0_121ksoftirqd/109:07:041
121750390irq/30-eth0_g0_121ksoftirqd/109:07:041
121750390irq/30-eth0_g0_0-21swapper/112:06:011
121750390irq/30-eth0_g0_0-21swapper/111:58:411
121650390irq/29-eth0_g0_2004599cyclictest09:40:220
121650390irq/29-eth0_g0_1964-21runrttasks08:00:410
121650390irq/29-eth0_g0_13-21kworker/0:111:55:450
121650390irq/29-eth0_g0_13-21kworker/0:111:26:320
121650390irq/29-eth0_g0_13-21kworker/0:110:45:500
121650390irq/29-eth0_g0_13-21kworker/0:110:28:450
121650390irq/29-eth0_g0_13-21kworker/0:110:24:240
121650390irq/29-eth0_g0_13-21kworker/0:109:47:240
121650390irq/29-eth0_g0_13-21kworker/0:109:21:540
121650390irq/29-eth0_g0_13-21kworker/0:109:11:230
121650390irq/29-eth0_g0_121ksoftirqd/111:13:370
121390ksoftirqd/1121750irq/30-eth0_g0_12:26:110
121390ksoftirqd/1121750irq/30-eth0_g0_12:08:250
121390ksoftirqd/1121750irq/30-eth0_g0_12:08:250
121390ksoftirqd/1121750irq/30-eth0_g0_11:39:410
121390ksoftirqd/1121750irq/30-eth0_g0_10:18:120
121390ksoftirqd/1121750irq/30-eth0_g0_10:18:120
121390ksoftirqd/1121750irq/30-eth0_g0_08:41:350
121390ksoftirqd/1121750irq/30-eth0_g0_08:09:430
121390ksoftirqd/1121750irq/30-eth0_g0_08:09:430
247392380sleep1121650irq/29-eth0_g0_11:47:501
2004699381cyclictest7654-21cat08:26:341
2004699381cyclictest24464-21unixbench_multi07:21:351
193232380sleep1121650irq/29-eth0_g0_09:14:321
121750380irq/30-eth0_g0_1219-21kworker/1:211:54:171
121750380irq/30-eth0_g0_121ksoftirqd/111:19:341
121750380irq/30-eth0_g0_121ksoftirqd/107:59:371
121650380irq/29-eth0_g0_25334-21missed_timers07:26:290
121650380irq/29-eth0_g0_1964-21runrttasks11:01:200
121650380irq/29-eth0_g0_1964-21runrttasks07:48:260
121650380irq/29-eth0_g0_13-21kworker/0:112:13:440
121650380irq/29-eth0_g0_13-21kworker/0:112:04:200
121650380irq/29-eth0_g0_13-21kworker/0:109:56:340
121650380irq/29-eth0_g0_121ksoftirqd/109:36:551
121380ksoftirqd/122401-21ntpdc09:26:321
121380ksoftirqd/1121750irq/30-eth0_g0_10:02:000
121380ksoftirqd/1121750irq/30-eth0_g0_09:34:370
121380ksoftirqd/1121750irq/30-eth0_g0_08:41:140
121380ksoftirqd/1121650irq/29-eth0_g0_11:14:421
121380ksoftirqd/1121650irq/29-eth0_g0_08:32:251
2004699372cyclictest19634-21unixbench_multi11:26:341
2004699372cyclictest14572-21munin-run08:56:141
2004699372cyclictest13386-21runrttasks08:51:141
2004699371cyclictest322352sleep110:06:321
2004699371cyclictest25662-21unixbench_multi07:26:351
2004699371cyclictest205292sleep107:06:371
2004699371cyclictest0-21swapper/108:36:581
121750370irq/30-eth0_g0_1219-21kworker/1:212:13:371
121750370irq/30-eth0_g0_1219-21kworker/1:211:43:321
121750370irq/30-eth0_g0_121ksoftirqd/112:07:161
121750370irq/30-eth0_g0_121ksoftirqd/112:07:161
121750370irq/30-eth0_g0_121ksoftirqd/110:45:041
121750370irq/30-eth0_g0_121ksoftirqd/109:24:221
121650370irq/29-eth0_g0_31820-21unixbench_multi07:51:350
121650370irq/29-eth0_g0_1964-21runrttasks07:36:540
121650370irq/29-eth0_g0_1964-21runrttasks07:25:170
121650370irq/29-eth0_g0_1964-21runrttasks07:11:070
121650370irq/29-eth0_g0_13752-21missed_timers08:51:290
121650370irq/29-eth0_g0_13-21kworker/0:110:47:240
121650370irq/29-eth0_g0_121ksoftirqd/111:49:050
2004699361cyclictest63922sleep108:21:301
2004699361cyclictest50982sleep108:16:261
2004699361cyclictest30668-21vmstat07:46:361
2004699361cyclictest26332-21df07:31:261
2004699361cyclictest17022-21latency_hist09:06:141
121750360irq/30-eth0_g0_1219-21kworker/1:211:07:361
121650360irq/29-eth0_g0_9225-21unixbench_singl08:31:350
121650360irq/29-eth0_g0_7628-21ls08:26:330
121650360irq/29-eth0_g0_6756-21grep08:21:360
121650360irq/29-eth0_g0_28869-21df_inode07:41:270
121650360irq/29-eth0_g0_1964-21runrttasks07:18:060
121650360irq/29-eth0_g0_1964-21runrttasks07:18:060
121650360irq/29-eth0_g0_15008-21netstat08:56:320
121650360irq/29-eth0_g0_0-21swapper/008:49:010
2004699352cyclictest4290-21unixbench_multi08:11:351
2004699351cyclictest14841-21/usr/sbin/munin08:56:291
121650350irq/29-eth0_g0_26399-21df_abs07:31:260
121650350irq/29-eth0_g0_21365-21egrep07:11:250
2004699341cyclictest1964-21runrttasks08:46:121
121650340irq/29-eth0_g0_4018-21netstat08:11:300
2004699321cyclictest0-21swapper/107:52:121
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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