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2026-08-28 - 01:35

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 Aug 27, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3214621430sleep0121650irq/29-eth0_g0_21:08:240
2182321280sleep1121650irq/29-eth0_g0_22:39:041
78802840sleep0121750irq/30-eth0_g0_23:55:190
121840ksoftirqd/1121750irq/30-eth0_g0_20:11:200
121800ksoftirqd/1121750irq/30-eth0_g0_00:33:580
121660ksoftirqd/1121750irq/30-eth0_g0_20:33:061
170892650sleep1121650irq/29-eth0_g0_22:20:571
121580ksoftirqd/1112122sleep000:06:320
121490ksoftirqd/1121750irq/30-eth0_g0_23:57:031
121470ksoftirqd/1121750irq/30-eth0_g0_22:01:461
121470ksoftirqd/1121750irq/30-eth0_g0_00:13:211
121470ksoftirqd/1121750irq/30-eth0_g0_00:06:181
121650460irq/29-eth0_g0_1251-21wc19:01:300
121460ksoftirqd/1121650irq/29-eth0_g0_23:26:361
265522450sleep0121650irq/29-eth0_g0_22:57:020
121650450irq/29-eth0_g0_31ksoftirqd/022:26:290
121450ksoftirqd/1121650irq/29-eth0_g0_21:10:411
121650440irq/29-eth0_g0_1964-21runrttasks21:20:280
121440ksoftirqd/1121750irq/30-eth0_g0_23:47:531
121440ksoftirqd/1121750irq/30-eth0_g0_23:47:531
121440ksoftirqd/1121750irq/30-eth0_g0_21:52:440
121440ksoftirqd/1121650irq/29-eth0_g0_21:59:441
121440ksoftirqd/1121650irq/29-eth0_g0_19:06:260
121440ksoftirqd/1121650irq/29-eth0_g0_19:06:260
121750430irq/30-eth0_g0_1219-21kworker/1:223:51:271
121750430irq/30-eth0_g0_1219-21kworker/1:222:21:141
121750430irq/30-eth0_g0_121ksoftirqd/122:56:301
121650430irq/29-eth0_g0_14370-21latency19:56:220
121430ksoftirqd/1121650irq/29-eth0_g0_23:02:121
121750420irq/30-eth0_g0_1219-21kworker/1:223:09:301
121650420irq/29-eth0_g0_0-21swapper/019:46:300
121420ksoftirqd/1121650irq/29-eth0_g0_22:24:540
292242410sleep0121650irq/29-eth0_g0_23:09:370
121750410irq/30-eth0_g0_1219-21kworker/1:222:06:271
121750410irq/30-eth0_g0_0-21swapper/122:15:551
121650410irq/29-eth0_g0_31ksoftirqd/021:15:570
121650410irq/29-eth0_g0_13-21kworker/0:123:49:010
121650410irq/29-eth0_g0_13-21kworker/0:123:49:010
121650410irq/29-eth0_g0_13-21kworker/0:100:19:370
121410ksoftirqd/1121750irq/30-eth0_g0_21:57:430
121410ksoftirqd/1121650irq/29-eth0_g0_23:13:291
121410ksoftirqd/1121650irq/29-eth0_g0_00:13:500
176642400sleep1121650irq/29-eth0_g0_00:35:141
121750400irq/30-eth0_g0_1219-21kworker/1:223:35:391
121750400irq/30-eth0_g0_1219-21kworker/1:223:35:391
121750400irq/30-eth0_g0_1219-21kworker/1:221:21:331
121750400irq/30-eth0_g0_1219-21kworker/1:221:21:331
121750400irq/30-eth0_g0_121ksoftirqd/119:54:231
121650400irq/29-eth0_g0_31ksoftirqd/020:21:300
121650400irq/29-eth0_g0_13-21kworker/0:122:46:490
121650400irq/29-eth0_g0_13-21kworker/0:121:28:390
121650400irq/29-eth0_g0_121ksoftirqd/123:15:400
121400ksoftirqd/1121750irq/30-eth0_g0_23:17:480
121400ksoftirqd/1121650irq/29-eth0_g0_21:32:170
121400ksoftirqd/1121650irq/29-eth0_g0_20:38:261
180299392cyclictest30267-21irqstats21:01:251
180299391cyclictest5961-21awk19:21:281
180299391cyclictest18248-21proc_pri20:11:281
121750390irq/30-eth0_g0_1219-21kworker/1:222:48:091
121750390irq/30-eth0_g0_1219-21kworker/1:221:17:481
121750390irq/30-eth0_g0_1219-21kworker/1:221:14:121
121750390irq/30-eth0_g0_12138-21proc_pri19:46:291
121750390irq/30-eth0_g0_0-21swapper/122:35:061
121750390irq/30-eth0_g0_0-21swapper/121:32:401
121650390irq/29-eth0_g0_87572sleep019:31:360
121650390irq/29-eth0_g0_73202chrt21:41:100
121650390irq/29-eth0_g0_15845-21taskset22:15:390
121650390irq/29-eth0_g0_14167-21/usr/sbin/munin00:21:310
121650390irq/29-eth0_g0_13-21kworker/0:123:26:500
121650390irq/29-eth0_g0_13-21kworker/0:123:01:240
121650390irq/29-eth0_g0_13-21kworker/0:122:32:020
121650390irq/29-eth0_g0_13-21kworker/0:121:50:030
121650390irq/29-eth0_g0_13-21kworker/0:121:42:300
121650390irq/29-eth0_g0_13-21kworker/0:121:22:240
121650390irq/29-eth0_g0_13-21kworker/0:121:22:240
121650390irq/29-eth0_g0_13-21kworker/0:100:01:200
121650390irq/29-eth0_g0_121ksoftirqd/123:33:390
121650390irq/29-eth0_g0_121ksoftirqd/123:33:390
121650390irq/29-eth0_g0_121ksoftirqd/122:54:540
121650390irq/29-eth0_g0_121ksoftirqd/122:02:510
121390ksoftirqd/1121750irq/30-eth0_g0_23:38:060
121390ksoftirqd/1121750irq/30-eth0_g0_23:22:100
121390ksoftirqd/1121750irq/30-eth0_g0_20:44:190
121390ksoftirqd/1121750irq/30-eth0_g0_00:28:270
121390ksoftirqd/1121750irq/30-eth0_g0_00:28:270
180299381cyclictest18951-21zcat22:26:301
180299381cyclictest10325-21ps21:51:291
121750380irq/30-eth0_g0_1219-21kworker/1:223:45:171
121750380irq/30-eth0_g0_1219-21kworker/1:223:24:161
121750380irq/30-eth0_g0_1219-21kworker/1:221:40:571
121750380irq/30-eth0_g0_1219-21kworker/1:221:30:401
121750380irq/30-eth0_g0_121ksoftirqd/123:19:391
121750380irq/30-eth0_g0_121ksoftirqd/121:48:451
121750380irq/30-eth0_g0_121ksoftirqd/100:26:401
121750380irq/30-eth0_g0_121ksoftirqd/100:26:401
121650380irq/29-eth0_g0_5519-21wc23:46:100
121650380irq/29-eth0_g0_30799-21sshd21:01:590
121650380irq/29-eth0_g0_31ksoftirqd/022:09:120
121650380irq/29-eth0_g0_1964-21runrttasks20:26:470
121650380irq/29-eth0_g0_17246-21head20:06:320
121650380irq/29-eth0_g0_13-21kworker/0:123:58:040
121650380irq/29-eth0_g0_13-21kworker/0:122:42:210
121650380irq/29-eth0_g0_13-21kworker/0:122:20:240
121380ksoftirqd/1121750irq/30-eth0_g0_20:02:000
121380ksoftirqd/1121750irq/30-eth0_g0_19:15:020
121380ksoftirqd/1121650irq/29-eth0_g0_23:36:261
216892370sleep121690-21/usr/sbin/munin20:26:241
180299372cyclictest9946-21head19:36:371
180299371cyclictest84202sleep119:31:281
180299371cyclictest2442-21sendmail_mailqu19:06:291
180299371cyclictest2442-21sendmail_mailqu19:06:291
180299371cyclictest206372sleep120:21:281
180299371cyclictest19684-21head20:16:341
180299371cyclictest15300-21chrt00:26:111
121750370irq/30-eth0_g0_1219-21kworker/1:200:17:331
121750370irq/30-eth0_g0_1219-21kworker/1:200:05:161
121650370irq/29-eth0_g0_9770-21chrt19:36:350
121650370irq/29-eth0_g0_7065-21cat19:26:260
121650370irq/29-eth0_g0_25063-21taskset20:41:100
121650370irq/29-eth0_g0_121ksoftirqd/121:43:311
121370ksoftirqd/1121650irq/29-eth0_g0_20:03:251
121370ksoftirqd/1121650irq/29-eth0_g0_19:01:281
180299361cyclictest26662-21taskset20:46:261
180299361cyclictest22300-21ethtool22:41:211
145622360sleep10-21swapper/119:56:271
121750360irq/30-eth0_g0_7483-21grep19:26:341
121650360irq/29-eth0_g0_4746-21grep19:16:260
121650360irq/29-eth0_g0_29489-21unixbench_singl20:56:320
121650360irq/29-eth0_g0_1964-21runrttasks22:37:210
121650360irq/29-eth0_g0_1964-21runrttasks20:31:230
121650360irq/29-eth0_g0_1964-21runrttasks19:21:350
121650360irq/29-eth0_g0_13307-21runrttasks19:51:290
121650360irq/29-eth0_g0_0-21swapper/019:46:100
121650360irq/29-eth0_g0_0-21swapper/019:46:100
121360ksoftirqd/1121750irq/30-eth0_g0_22:53:081
180299351cyclictest4720-21netstat19:16:241
180299351cyclictest0-21swapper/120:59:041
121650350irq/29-eth0_g0_19669-21unixbench_multi20:16:340
121650350irq/29-eth0_g0_1964-21runrttasks20:55:560
121650350irq/29-eth0_g0_1964-21runrttasks20:51:020
121350ksoftirqd/125664-21chrt20:41:291
180299331cyclictest3220-21df_abs19:11:221
180299331cyclictest0-21swapper/120:07:021
121750330irq/30-eth0_g0_0-21swapper/120:51:331
121750320irq/30-eth0_g0_11089-21unixbench_multi19:41:321
121750320irq/30-eth0_g0_11089-21unixbench_multi19:41:321
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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