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2026-07-21 - 19:30

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 Jul 21, 2026 12:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121870ksoftirqd/1121750irq/30-eth0_g0_10:47:151
121830ksoftirqd/1314592chrt10:47:130
121790ksoftirqd/1121750irq/30-eth0_g0_09:43:550
168722690sleep0121650irq/29-eth0_g0_09:47:490
238512610chrt121750irq/30-eth0_g0_08:02:561
216482520sleep0121750irq/30-eth0_g0_10:07:160
104092500sleep1121750irq/30-eth0_g0_07:07:551
121480ksoftirqd/1121650irq/29-eth0_g0_12:34:120
274862470sleep1121750irq/30-eth0_g0_10:28:471
121470ksoftirqd/1121750irq/30-eth0_g0_10:22:540
121470ksoftirqd/1121750irq/30-eth0_g0_10:01:581
121460ksoftirqd/1121650irq/29-eth0_g0_11:19:551
121460ksoftirqd/1121650irq/29-eth0_g0_11:00:551
121460ksoftirqd/1121650irq/29-eth0_g0_11:00:551
121750450irq/30-eth0_g0_1219-21kworker/1:210:06:181
121650450irq/29-eth0_g0_13-21kworker/0:111:35:450
121450ksoftirqd/1121750irq/30-eth0_g0_11:47:301
121450ksoftirqd/1121750irq/30-eth0_g0_10:53:121
121450ksoftirqd/1121650irq/29-eth0_g0_10:37:461
121450ksoftirqd/1121650irq/29-eth0_g0_08:37:121
9941994410cyclictest188112sleep107:42:541
121750440irq/30-eth0_g0_9196-21ntp_offset07:02:561
121750440irq/30-eth0_g0_31ksoftirqd/010:17:510
121650440irq/29-eth0_g0_2797-21latency_hist11:02:370
121650440irq/29-eth0_g0_2797-21latency_hist11:02:370
121650440irq/29-eth0_g0_1964-21runrttasks07:02:540
121440ksoftirqd/1121650irq/29-eth0_g0_09:37:541
121750430irq/30-eth0_g0_1219-21kworker/1:209:34:321
121430ksoftirqd/1121750irq/30-eth0_g0_12:20:431
121430ksoftirqd/1121750irq/30-eth0_g0_12:14:431
121430ksoftirqd/1121650irq/29-eth0_g0_11:25:401
121430ksoftirqd/1121650irq/29-eth0_g0_10:16:141
51512420sleep0121750irq/30-eth0_g0_11:11:570
190172420sleep0121650irq/29-eth0_g0_09:55:100
121750420irq/30-eth0_g0_1219-21kworker/1:210:50:281
121650420irq/29-eth0_g0_18975-21if_err_eth012:07:520
121750410irq/30-eth0_g0_1219-21kworker/1:209:49:451
121750410irq/30-eth0_g0_121ksoftirqd/110:33:161
121750410irq/30-eth0_g0_121ksoftirqd/109:42:571
121650410irq/29-eth0_g0_24240-21fgrep12:27:590
121650410irq/29-eth0_g0_13-21kworker/0:112:18:310
121650410irq/29-eth0_g0_13-21kworker/0:109:18:080
121650410irq/29-eth0_g0_0-21swapper/008:02:510
121410ksoftirqd/1121750irq/30-eth0_g0_09:07:381
121410ksoftirqd/1121650irq/29-eth0_g0_11:13:281
121410ksoftirqd/1121650irq/29-eth0_g0_09:17:561
121410ksoftirqd/1121650irq/29-eth0_g0_08:42:540
994199401cyclictest5189-21chrt08:57:591
994199401cyclictest15026-21chrt11:52:381
121750400irq/30-eth0_g0_1219-21kworker/1:212:02:011
121750400irq/30-eth0_g0_1219-21kworker/1:210:10:561
121650400irq/29-eth0_g0_23269-21latency10:12:530
121650400irq/29-eth0_g0_13-21kworker/0:111:49:150
121650400irq/29-eth0_g0_13-21kworker/0:111:29:590
121650400irq/29-eth0_g0_13-21kworker/0:111:23:410
121650400irq/29-eth0_g0_13-21kworker/0:110:39:350
121650400irq/29-eth0_g0_13-21kworker/0:110:36:030
121650400irq/29-eth0_g0_13-21kworker/0:110:29:420
121650400irq/29-eth0_g0_13-21kworker/0:109:24:420
121650400irq/29-eth0_g0_13-21kworker/0:109:17:030
121400ksoftirqd/1121650irq/29-eth0_g0_08:18:531
121400ksoftirqd/1121650irq/29-eth0_g0_07:25:231
121400ksoftirqd/1121650irq/29-eth0_g0_07:25:231
994199391cyclictest32650-21fgrep08:37:591
994199391cyclictest19005-21ethtool12:07:521
994199391cyclictest1586-21unixbench_singl08:43:011
994199391cyclictest15170-21iostat07:27:531
121750390irq/30-eth0_g0_31ksoftirqd/010:54:100
121750390irq/30-eth0_g0_1964-21runrttasks12:17:320
121750390irq/30-eth0_g0_1219-21kworker/1:212:07:371
121750390irq/30-eth0_g0_1219-21kworker/1:211:35:101
121750390irq/30-eth0_g0_1219-21kworker/1:210:25:081
121750390irq/30-eth0_g0_1219-21kworker/1:209:31:191
121750390irq/30-eth0_g0_121ksoftirqd/112:35:271
121750390irq/30-eth0_g0_121ksoftirqd/111:30:271
121750390irq/30-eth0_g0_121ksoftirqd/107:33:361
121750390irq/30-eth0_g0_0-21swapper/109:56:151
121650390irq/29-eth0_g0_22480-21unixbench_singl10:08:020
121650390irq/29-eth0_g0_18030-21sed07:38:010
121650390irq/29-eth0_g0_13-21kworker/0:112:25:480
121650390irq/29-eth0_g0_13-21kworker/0:112:07:240
121650390irq/29-eth0_g0_13-21kworker/0:112:00:050
121650390irq/29-eth0_g0_13-21kworker/0:111:43:580
121650390irq/29-eth0_g0_13-21kworker/0:109:38:000
121650390irq/29-eth0_g0_121ksoftirqd/109:28:270
121390ksoftirqd/1121650irq/29-eth0_g0_09:15:051
121390ksoftirqd/1121650irq/29-eth0_g0_08:56:421
121390ksoftirqd/1121650irq/29-eth0_g0_08:49:091
121390ksoftirqd/1121650irq/29-eth0_g0_07:52:461
994199381cyclictest22666-21netstat07:57:551
994199381cyclictest22628-21chrt12:22:501
994199381cyclictest15783-21tail11:53:011
994199381cyclictest126122sleep107:17:511
121750380irq/30-eth0_g0_4205-21df_abs11:07:501
121750380irq/30-eth0_g0_31ksoftirqd/009:10:530
121750380irq/30-eth0_g0_31ksoftirqd/009:10:530
121750380irq/30-eth0_g0_1219-21kworker/1:209:23:551
121750380irq/30-eth0_g0_121ksoftirqd/111:40:441
121750380irq/30-eth0_g0_121ksoftirqd/109:08:571
121750380irq/30-eth0_g0_121ksoftirqd/109:08:571
121650380irq/29-eth0_g0_31ksoftirqd/010:48:550
121650380irq/29-eth0_g0_31ksoftirqd/009:32:540
121650380irq/29-eth0_g0_13-21kworker/0:111:21:480
121650380irq/29-eth0_g0_13-21kworker/0:111:15:230
121650380irq/29-eth0_g0_13-21kworker/0:111:03:010
121650380irq/29-eth0_g0_13-21kworker/0:111:03:010
121650380irq/29-eth0_g0_0-21swapper/007:43:010
121650380irq/29-eth0_g0_0-21swapper/007:34:550
121380ksoftirqd/1121650irq/29-eth0_g0_12:27:511
121380ksoftirqd/1121650irq/29-eth0_g0_10:19:411
121380ksoftirqd/1121650irq/29-eth0_g0_08:27:111
121380ksoftirqd/1121650irq/29-eth0_g0_07:40:221
994199371cyclictest300692sleep108:27:581
994199371cyclictest11434-21forks07:12:511
121650370irq/29-eth0_g0_6479-21unixbench_multi09:02:580
121650370irq/29-eth0_g0_26375-21ntp_offset08:12:550
121650370irq/29-eth0_g0_13-21kworker/0:111:53:350
121650370irq/29-eth0_g0_13-21kworker/0:111:37:500
121650370irq/29-eth0_g0_12486-21cpu07:17:500
121650360irq/29-eth0_g0_29663-21/usr/sbin/munin08:27:520
121650360irq/29-eth0_g0_22590-21memory07:57:550
121650360irq/29-eth0_g0_1964-21runrttasks07:52:390
121650360irq/29-eth0_g0_121ksoftirqd/111:04:071
121650360irq/29-eth0_g0_121ksoftirqd/111:04:071
121650360irq/29-eth0_g0_0-21swapper/009:59:020
121650360irq/29-eth0_g0_0-21swapper/008:52:580
121360ksoftirqd/1121650irq/29-eth0_g0_08:07:571
994199351cyclictest202122sleep107:47:521
121650350irq/29-eth0_g0_27814-21ls08:18:010
121650350irq/29-eth0_g0_2126-21lldpd07:47:400
121650350irq/29-eth0_g0_1964-21runrttasks08:34:370
121650350irq/29-eth0_g0_1964-21runrttasks08:22:580
121650350irq/29-eth0_g0_15591-21grep07:28:000
121650350irq/29-eth0_g0_13-21kworker/0:108:57:570
121750340irq/30-eth0_g0_26519-21sendmail_mailqu08:12:581
121650340irq/29-eth0_g0_793-21munin-run08:42:380
121650340irq/29-eth0_g0_2388-21irqstats08:47:530
121650340irq/29-eth0_g0_13946-21iostat07:22:540
121650340irq/29-eth0_g0_13946-21iostat07:22:540
121650340irq/29-eth0_g0_11635-21ntp_kernel_err07:12:550
121650320irq/29-eth0_g0_25299-21awk08:07:580
121650320irq/29-eth0_g0_0-21swapper/007:07:520
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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