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2026-07-06 - 10:56

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 Mon Jul 06, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
184542660sleep0121650irq/29-eth0_g0_19:04:330
121640ksoftirqd/1121750irq/30-eth0_g0_00:38:140
121640ksoftirqd/1121750irq/30-eth0_g0_00:29:450
121640ksoftirqd/1121750irq/30-eth0_g0_00:29:450
121590ksoftirqd/1121750irq/30-eth0_g0_20:13:391
174602570chrt121750irq/30-eth0_g0_23:25:311
290642550sleep1121750irq/30-eth0_g0_00:13:291
151602550sleep1121750irq/30-eth0_g0_23:17:181
181662540sleep1121750irq/30-eth0_g0_19:03:341
52002480sleep0121650irq/29-eth0_g0_22:35:280
16902480sleep0121650irq/29-eth0_g0_22:22:340
315042470sleep0121650irq/29-eth0_g0_22:10:360
121650470irq/29-eth0_g0_121ksoftirqd/121:03:321
121470ksoftirqd/1121750irq/30-eth0_g0_22:48:401
121460ksoftirqd/1121750irq/30-eth0_g0_00:12:171
121750450irq/30-eth0_g0_1219-21kworker/1:200:25:021
121750450irq/30-eth0_g0_1219-21kworker/1:200:25:021
121750440irq/30-eth0_g0_1219-21kworker/1:222:43:311
121650440irq/29-eth0_g0_31ksoftirqd/023:49:040
121650440irq/29-eth0_g0_31ksoftirqd/023:17:550
121650440irq/29-eth0_g0_0-21swapper/019:28:350
121440ksoftirqd/1121650irq/29-eth0_g0_20:18:391
121440ksoftirqd/1121650irq/29-eth0_g0_00:32:101
121440ksoftirqd/1121650irq/29-eth0_g0_00:32:101
121750430irq/30-eth0_g0_1219-21kworker/1:223:49:031
121750430irq/30-eth0_g0_1219-21kworker/1:200:22:381
121650430irq/29-eth0_g0_31ksoftirqd/022:45:540
121650430irq/29-eth0_g0_24326-21open_files23:53:330
121650430irq/29-eth0_g0_13-21kworker/0:122:50:410
121430ksoftirqd/1121650irq/29-eth0_g0_00:36:181
121750420irq/30-eth0_g0_1219-21kworker/1:221:25:041
121650420irq/29-eth0_g0_31ksoftirqd/021:40:580
121650420irq/29-eth0_g0_1964-21runrttasks20:53:130
121650420irq/29-eth0_g0_17813-21unixbench_singl21:13:370
121650420irq/29-eth0_g0_13-21kworker/0:123:36:090
121650420irq/29-eth0_g0_13-21kworker/0:122:41:470
121420ksoftirqd/1121650irq/29-eth0_g0_19:31:191
121750410irq/30-eth0_g0_1219-21kworker/1:222:03:321
121750410irq/30-eth0_g0_121ksoftirqd/123:39:521
121650410irq/29-eth0_g0_13-21kworker/0:123:18:290
121650410irq/29-eth0_g0_13-21kworker/0:122:17:410
121650410irq/29-eth0_g0_13-21kworker/0:121:50:290
121650410irq/29-eth0_g0_0-21swapper/019:38:280
121410ksoftirqd/1121650irq/29-eth0_g0_22:37:191
121410ksoftirqd/1121650irq/29-eth0_g0_21:22:000
121410ksoftirqd/1121650irq/29-eth0_g0_21:19:151
115142410sleep1121750irq/30-eth0_g0_23:02:391
121750400irq/30-eth0_g0_31ksoftirqd/022:54:460
121750400irq/30-eth0_g0_1219-21kworker/1:222:31:091
121750400irq/30-eth0_g0_1219-21kworker/1:222:01:561
121650400irq/29-eth0_g0_29530-21df_inode22:03:300
121650400irq/29-eth0_g0_24705-21/usr/sbin/munin21:43:300
121650400irq/29-eth0_g0_24705-21/usr/sbin/munin21:43:300
121650400irq/29-eth0_g0_13-21kworker/0:123:44:220
121650400irq/29-eth0_g0_13-21kworker/0:123:05:470
121650400irq/29-eth0_g0_13-21kworker/0:123:05:470
121650400irq/29-eth0_g0_13-21kworker/0:122:31:190
121650400irq/29-eth0_g0_13-21kworker/0:122:26:060
121650400irq/29-eth0_g0_13-21kworker/0:121:33:270
121650400irq/29-eth0_g0_13-21kworker/0:100:21:150
121650400irq/29-eth0_g0_121ksoftirqd/100:13:200
121400ksoftirqd/1121650irq/29-eth0_g0_22:42:181
121400ksoftirqd/1121650irq/29-eth0_g0_20:54:081
121400ksoftirqd/1121650irq/29-eth0_g0_19:58:161
121400ksoftirqd/1121650irq/29-eth0_g0_19:58:161
1878699392cyclictest2109-21lldpd22:56:151
1878699391cyclictest1246-21unixbench_multi22:18:361
121750390irq/30-eth0_g0_1219-21kworker/1:222:15:531
121750390irq/30-eth0_g0_121ksoftirqd/123:32:111
121750390irq/30-eth0_g0_121ksoftirqd/122:09:411
121750390irq/30-eth0_g0_121ksoftirqd/121:33:341
121750390irq/30-eth0_g0_121ksoftirqd/100:01:031
121650390irq/29-eth0_g0_31ksoftirqd/023:00:170
121650390irq/29-eth0_g0_28674-21gzip21:58:360
121650390irq/29-eth0_g0_1964-21runrttasks23:31:000
121650390irq/29-eth0_g0_1964-21runrttasks21:55:400
121650390irq/29-eth0_g0_1964-21runrttasks20:32:300
121650390irq/29-eth0_g0_13-21kworker/0:123:27:150
121650390irq/29-eth0_g0_13-21kworker/0:123:08:490
121650390irq/29-eth0_g0_13-21kworker/0:121:10:140
121650390irq/29-eth0_g0_13-21kworker/0:100:04:010
121650390irq/29-eth0_g0_13-21kworker/0:100:02:360
121390ksoftirqd/1121650irq/29-eth0_g0_23:19:201
18786993833cyclictest19508-21awk19:08:351
1878699382cyclictest11417-21/usr/sbin/munin20:48:341
1878699381cyclictest29365-21grep19:48:371
1878699381cyclictest27838-21seq19:43:301
1878699381cyclictest14568-21taskset21:03:151
121750380irq/30-eth0_g0_1219-21kworker/1:223:03:271
121750380irq/30-eth0_g0_1219-21kworker/1:223:03:271
121750380irq/30-eth0_g0_1219-21kworker/1:221:13:401
121750380irq/30-eth0_g0_121ksoftirqd/121:32:531
121650380irq/29-eth0_g0_4094-21processes20:18:360
121650380irq/29-eth0_g0_31ksoftirqd/020:03:300
121650380irq/29-eth0_g0_1964-21runrttasks21:02:420
121650380irq/29-eth0_g0_1964-21runrttasks00:23:270
121650380irq/29-eth0_g0_1964-21runrttasks00:23:270
121650380irq/29-eth0_g0_13-21kworker/0:123:39:360
121650380irq/29-eth0_g0_13-21kworker/0:121:28:360
121650380irq/29-eth0_g0_13-21kworker/0:100:08:530
121650380irq/29-eth0_g0_0-21swapper/020:13:350
121380ksoftirqd/1121650irq/29-eth0_g0_20:29:211
121380ksoftirqd/1121650irq/29-eth0_g0_20:03:431
121380ksoftirqd/1121650irq/29-eth0_g0_19:27:021
1878699372cyclictest23396-21df_inode21:38:281
1878699371cyclictest267722sleep119:38:371
1878699371cyclictest25695-21/usr/sbin/munin21:48:371
1878699371cyclictest21676-21ethtool23:43:281
1878699371cyclictest19150-21sed23:33:261
121750370irq/30-eth0_g0_1219-21kworker/1:223:57:541
121750370irq/30-eth0_g0_1219-21kworker/1:221:53:441
121750370irq/30-eth0_g0_1219-21kworker/1:221:43:281
121750370irq/30-eth0_g0_1219-21kworker/1:221:43:281
121750370irq/30-eth0_g0_1219-21kworker/1:200:06:401
121650370irq/29-eth0_g0_28003-21sendmail_mailst19:43:330
121650370irq/29-eth0_g0_26207-21ls19:38:160
121650370irq/29-eth0_g0_20803-21unixbench_singl19:13:360
121650370irq/29-eth0_g0_13-21kworker/0:121:26:130
121370ksoftirqd/1121650irq/29-eth0_g0_19:18:401
1878699361cyclictest8734-21ethtool20:38:281
1878699361cyclictest20810-21grep19:13:361
121750360irq/30-eth0_g0_1219-21kworker/1:223:11:181
121750360irq/30-eth0_g0_121ksoftirqd/122:23:411
121750360irq/30-eth0_g0_121ksoftirqd/121:09:281
121650360irq/29-eth0_g0_23158-21timerandwakeup19:23:350
121650360irq/29-eth0_g0_1964-21runrttasks20:56:490
121650360irq/29-eth0_g0_1958-21crond21:08:150
121650360irq/29-eth0_g0_1141-21/usr/sbin/munin20:08:370
121650360irq/29-eth0_g0_10435-21unixbench_singl20:43:360
1878699351cyclictest0-21swapper/120:36:151
121650350irq/29-eth0_g0_7767-21ps20:33:350
121650350irq/29-eth0_g0_29312-21unixbench_multi19:48:370
121650350irq/29-eth0_g0_22471-21latency_hist19:23:150
121650350irq/29-eth0_g0_0-21swapper/020:38:330
121650350irq/29-eth0_g0_0-21swapper/019:58:270
1878699341cyclictest13802sleep120:08:301
1878699341cyclictest0-21swapper/120:27:471
1878699341cyclictest0-21swapper/120:27:471
121650340irq/29-eth0_g0_19416-21wc19:08:340
121340ksoftirqd/1121750irq/30-eth0_g0_19:56:440
121340ksoftirqd/1121750irq/30-eth0_g0_19:56:440
1878699332cyclictest1983-21/usr/sbin/munin19:33:391
18786993317cyclictest10452-21unixbench_singl20:43:361
1878699330cyclictest0-21swapper/120:03:081
121650330irq/29-eth0_g0_5149-21missed_timers20:23:310
121650330irq/29-eth0_g0_5149-21missed_timers20:23:310
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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