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2025-12-19 - 08:54

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 highest latencies:
System rack3slot5s.osadl.org (updated Thu Dec 18, 2025 13:46:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
299232910sleep1121450irq/29-eth0_g0_10:40:111
121860ksoftirqd/1121450irq/29-eth0_g0_09:42:341
121840ksoftirqd/1121450irq/29-eth0_g0_07:07:320
121720ksoftirqd/1156472chrt11:53:150
156492710sleep0121550irq/30-eth0_g0_09:42:290
96342610sleep1121550irq/30-eth0_g0_11:29:331
121580ksoftirqd/1121450irq/29-eth0_g0_12:31:241
121580ksoftirqd/1121450irq/29-eth0_g0_12:31:241
322672570chrt121550irq/30-eth0_g0_10:49:491
251802540sleep0121550irq/30-eth0_g0_08:07:380
121500ksoftirqd/1121550irq/30-eth0_g0_10:16:241
121470ksoftirqd/1121450irq/29-eth0_g0_11:34:561
121470ksoftirqd/1121450irq/29-eth0_g0_10:51:541
36592450sleep1121550irq/30-eth0_g0_11:05:291
121450ksoftirqd/1121550irq/30-eth0_g0_09:25:451
274912440sleep0121450irq/29-eth0_g0_10:30:250
121450440irq/29-eth0_g0_13-21kworker/0:110:35:410
121440ksoftirqd/1121550irq/30-eth0_g0_10:32:431
121440ksoftirqd/1121550irq/30-eth0_g0_07:27:360
121440ksoftirqd/1121450irq/29-eth0_g0_11:57:421
121440ksoftirqd/1121450irq/29-eth0_g0_08:02:291
212662430sleep0121450irq/29-eth0_g0_12:17:250
121550430irq/30-eth0_g0_1221-21kworker/1:209:19:271
121450430irq/29-eth0_g0_20614-21missed_timers10:02:320
121450430irq/29-eth0_g0_13-21kworker/0:111:00:120
121450430irq/29-eth0_g0_13-21kworker/0:109:59:040
121450430irq/29-eth0_g0_127452sleep009:29:530
121430ksoftirqd/1121550irq/30-eth0_g0_11:40:461
121430ksoftirqd/1121450irq/29-eth0_g0_11:02:381
121430ksoftirqd/1121450irq/29-eth0_g0_10:23:301
226152420sleep0121550irq/30-eth0_g0_10:10:410
121550420irq/30-eth0_g0_1221-21kworker/1:211:13:471
121420ksoftirqd/1121450irq/29-eth0_g0_10:57:311
121420ksoftirqd/1121450irq/29-eth0_g0_10:46:090
121450410irq/29-eth0_g0_31ksoftirqd/012:36:560
121450410irq/29-eth0_g0_13-21kworker/0:110:55:000
121410ksoftirqd/1121550irq/30-eth0_g0_11:22:350
121410ksoftirqd/1121450irq/29-eth0_g0_09:45:441
1075099412cyclictest3684-21sendmail_mailqu08:52:351
1075099411cyclictest25833-21taskset12:36:501
121550400irq/30-eth0_g0_1221-21kworker/1:210:29:161
121550400irq/30-eth0_g0_1221-21kworker/1:209:23:391
121450400irq/29-eth0_g0_31ksoftirqd/011:27:340
121450400irq/29-eth0_g0_25025-21seq12:32:270
121450400irq/29-eth0_g0_25025-21seq12:32:270
121450400irq/29-eth0_g0_13-21kworker/0:111:32:330
121450400irq/29-eth0_g0_13-21kworker/0:110:40:180
121450400irq/29-eth0_g0_13-21kworker/0:109:39:240
121450400irq/29-eth0_g0_13-21kworker/0:109:14:580
121400ksoftirqd/1121450irq/29-eth0_g0_11:34:401
121400ksoftirqd/1121450irq/29-eth0_g0_10:01:001
121400ksoftirqd/1121450irq/29-eth0_g0_08:30:271
121550390irq/30-eth0_g0_31ksoftirqd/011:16:120
121550390irq/30-eth0_g0_2039-21sendmail08:09:491
121550390irq/30-eth0_g0_121ksoftirqd/109:10:531
121550390irq/30-eth0_g0_0-21swapper/110:36:151
121450390irq/29-eth0_g0_4515-21unixbench_singl11:07:380
121450390irq/29-eth0_g0_31ksoftirqd/007:47:360
121450390irq/29-eth0_g0_16654-21unixbench_singl07:32:390
121450390irq/29-eth0_g0_13-21kworker/0:112:26:320
121450390irq/29-eth0_g0_13-21kworker/0:111:36:380
121450390irq/29-eth0_g0_13-21kworker/0:109:51:190
121450390irq/29-eth0_g0_13-21kworker/0:109:11:580
121390ksoftirqd/1121450irq/29-eth0_g0_11:47:381
121390ksoftirqd/1121450irq/29-eth0_g0_09:03:331
121390ksoftirqd/1121450irq/29-eth0_g0_08:22:271
121390ksoftirqd/1121450irq/29-eth0_g0_07:57:341
121390ksoftirqd/1121450irq/29-eth0_g0_07:38:591
121390ksoftirqd/1121450irq/29-eth0_g0_07:11:041
121550380irq/30-eth0_g0_12211kworker/1:210:13:391
121550380irq/30-eth0_g0_1221-21kworker/1:212:03:141
121550380irq/30-eth0_g0_1221-21kworker/1:211:20:561
121550380irq/30-eth0_g0_1221-21kworker/1:209:37:221
121550380irq/30-eth0_g0_0-21swapper/110:05:301
121550380irq/30-eth0_g0_0-21swapper/110:05:301
121450380irq/29-eth0_g0_31ksoftirqd/009:45:060
121450380irq/29-eth0_g0_13-21kworker/0:112:22:330
121450380irq/29-eth0_g0_13-21kworker/0:111:55:430
121450380irq/29-eth0_g0_13-21kworker/0:111:47:270
121450380irq/29-eth0_g0_13-21kworker/0:110:21:410
121450380irq/29-eth0_g0_13-21kworker/0:109:26:100
121450380irq/29-eth0_g0_13-21kworker/0:109:20:210
121450380irq/29-eth0_g0_121ksoftirqd/110:50:340
121450380irq/29-eth0_g0_0-21swapper/012:12:130
121450380irq/29-eth0_g0_0-21swapper/011:12:340
121380ksoftirqd/1121450irq/29-eth0_g0_10:05:480
121380ksoftirqd/1121450irq/29-eth0_g0_10:05:480
121380ksoftirqd/1121450irq/29-eth0_g0_08:55:051
121380ksoftirqd/1121450irq/29-eth0_g0_08:16:311
1075099389cyclictest0-21swapper/112:07:441
1075099389cyclictest0-21swapper/112:07:441
1075099381cyclictest6924-21grep11:17:381
1075099381cyclictest21675-21head12:17:321
1075099381cyclictest20177-21sendmail_mailst07:47:351
1075099381cyclictest18440-21wc09:52:341
121550370irq/30-eth0_g0_121ksoftirqd/109:32:221
121450370irq/29-eth0_g0_9597-21runrttasks07:04:571
121450370irq/29-eth0_g0_6824-21/usr/sbin/munin09:07:370
121450370irq/29-eth0_g0_3849-21grep08:52:370
121450370irq/29-eth0_g0_23856-21mailstats08:02:340
121450370irq/29-eth0_g0_2151-21awk08:47:280
121450370irq/29-eth0_g0_1941-21runrttasks07:21:190
121450370irq/29-eth0_g0_13-21kworker/0:112:03:560
121450370irq/29-eth0_g0_13-21kworker/0:110:26:400
121450370irq/29-eth0_g0_13-21kworker/0:110:15:050
121370ksoftirqd/1121550irq/30-eth0_g0_08:18:060
1075099372cyclictest0-21swapper/107:22:351
1075099371cyclictest240602sleep112:27:361
121550360irq/30-eth0_g0_1221-21kworker/1:212:09:571
121550360irq/30-eth0_g0_0-21swapper/109:58:101
121450360irq/29-eth0_g0_1941-21runrttasks12:09:160
121450360irq/29-eth0_g0_1941-21runrttasks12:09:160
121450360irq/29-eth0_g0_1941-21runrttasks11:40:360
121450360irq/29-eth0_g0_1941-21runrttasks09:00:430
121450360irq/29-eth0_g0_1941-21runrttasks08:58:510
121450360irq/29-eth0_g0_1941-21runrttasks08:39:380
121450360irq/29-eth0_g0_1941-21runrttasks08:39:380
121450360irq/29-eth0_g0_12521-21expr07:17:270
121360ksoftirqd/1121550irq/30-eth0_g0_08:20:520
121360ksoftirqd/1121550irq/30-eth0_g0_07:43:300
1075099362cyclictest18935-21/usr/sbin/munin07:42:341
1075099361cyclictest7290-21ps09:07:351
1075099361cyclictest2574-21grep08:47:361
1075099361cyclictest12912-21unixbench_multi07:17:341
121550350irq/30-eth0_g0_16197-21taskset07:32:321
121550350irq/30-eth0_g0_0-21swapper/111:49:501
121450350irq/29-eth0_g0_30661-21/usr/sbin/munin08:32:280
121450350irq/29-eth0_g0_1941-21runrttasks08:43:210
121450350irq/29-eth0_g0_1941-21runrttasks08:11:040
121450350irq/29-eth0_g0_17182-21/usr/sbin/munin07:37:270
121450350irq/29-eth0_g0_121ksoftirqd/112:23:221
121450350irq/29-eth0_g0_11178-21df_abs07:12:270
121350ksoftirqd/1121550irq/30-eth0_g0_07:52:250
10750993519cyclictest1331-21grep08:42:361
1075099351cyclictest32100-21taskset08:37:281
1075099351cyclictest32100-21taskset08:37:281
1075099351cyclictest2088-21lldpd07:50:451
121450340irq/29-eth0_g0_29868-21/usr/sbin/munin08:27:330
121450340irq/29-eth0_g0_0-21swapper/007:57:320
1075099341cyclictest15365-21grep07:27:351
10750993328cyclictest26685-21latency_hist08:14:491
302722320sleep10-21swapper/108:28:491
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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