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2026-03-31 - 03:11

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 Tue Mar 31, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
873421330sleep1121650irq/29-eth0_g0_22:43:501
1972221050sleep0121650irq/29-eth0_g0_23:28:100
121930ksoftirqd/1121750irq/30-eth0_g0_22:09:591
121760ksoftirqd/1121750irq/30-eth0_g0_21:25:011
121700ksoftirqd/1121750irq/30-eth0_g0_22:58:110
137212690sleep0121650irq/29-eth0_g0_23:04:450
121660ksoftirqd/1121650irq/29-eth0_g0_22:22:280
121660ksoftirqd/1121650irq/29-eth0_g0_22:22:280
121660ksoftirqd/1121650irq/29-eth0_g0_21:39:461
121640ksoftirqd/1121750irq/30-eth0_g0_23:51:260
121640ksoftirqd/1121750irq/30-eth0_g0_23:51:260
121570ksoftirqd/1121650irq/29-eth0_g0_21:31:431
121550ksoftirqd/1121750irq/30-eth0_g0_22:05:071
121520ksoftirqd/1121750irq/30-eth0_g0_23:30:031
121520ksoftirqd/1121750irq/30-eth0_g0_22:29:261
121520ksoftirqd/1121650irq/29-eth0_g0_21:52:480
110382510sleep0121650irq/29-eth0_g0_22:52:050
121750500irq/30-eth0_g0_2087999cyclictest22:53:111
121750500irq/30-eth0_g0_2087999cyclictest21:46:111
121650500irq/29-eth0_g0_2087999cyclictest21:49:571
121490ksoftirqd/1121750irq/30-eth0_g0_22:35:081
121490ksoftirqd/1121750irq/30-eth0_g0_21:19:471
121490ksoftirqd/1121750irq/30-eth0_g0_21:10:401
264102480sleep0121750irq/30-eth0_g0_21:43:350
20879994844cyclictest5692-21proc_pri22:30:051
20879994821cyclictest23294-21runrttasks19:19:211
121480ksoftirqd/1121750irq/30-eth0_g0_20:45:041
121480ksoftirqd/1121750irq/30-eth0_g0_19:54:581
121480ksoftirqd/1121650irq/29-eth0_g0_22:26:230
319172470sleep0121650irq/29-eth0_g0_00:17:160
2087999473cyclictest27784-21runrttasks19:35:071
2087999472cyclictest4629-21latency_hist00:39:461
2087999471cyclictest25605-21seq23:50:131
2087999471cyclictest25605-21seq23:50:131
121750470irq/30-eth0_g0_2087999cyclictest00:06:121
121470ksoftirqd/1121750irq/30-eth0_g0_22:20:231
121470ksoftirqd/1121750irq/30-eth0_g0_22:20:231
121470ksoftirqd/1121750irq/30-eth0_g0_20:30:030
121750460irq/30-eth0_g0_2087999cyclictest23:55:571
121460ksoftirqd/12087999cyclictest22:00:011
20879994529cyclictest24128-21unixbench_singl19:20:071
2087999451cyclictest3966-21unixbench_singl20:10:081
121750450irq/30-eth0_g0_2087999cyclictest23:11:061
121650450irq/29-eth0_g0_2087999cyclictest00:24:011
121650450irq/29-eth0_g0_0-21swapper/019:09:460
121450ksoftirqd/12087999cyclictest23:40:081
121450ksoftirqd/1121750irq/30-eth0_g0_22:55:291
121450ksoftirqd/1121750irq/30-eth0_g0_22:46:571
121450ksoftirqd/1121750irq/30-eth0_g0_21:42:281
121450ksoftirqd/1121750irq/30-eth0_g0_00:38:050
121450ksoftirqd/1121750irq/30-eth0_g0_00:17:361
2087999449cyclictest121650irq/29-eth0_g0_23:23:001
20879994429cyclictest1721-21unixbench_singl00:25:081
2087999441cyclictest20968-21/usr/sbin/munin19:09:561
121750440irq/30-eth0_g0_2087999cyclictest23:35:121
121650440irq/29-eth0_g0_1875-21runrttasks20:53:520
121440ksoftirqd/1121750irq/30-eth0_g0_21:16:161
121440ksoftirqd/1121650irq/29-eth0_g0_23:46:330
2087999431cyclictest2254-21unixbench_singl22:15:091
121750430irq/30-eth0_g0_2087999cyclictest20:29:571
121650430irq/29-eth0_g0_1875-21runrttasks23:56:050
121430ksoftirqd/1121750irq/30-eth0_g0_23:17:451
121430ksoftirqd/1121750irq/30-eth0_g0_23:12:520
121430ksoftirqd/1121750irq/30-eth0_g0_00:33:551
121430ksoftirqd/1121750irq/30-eth0_g0_00:01:051
2087999428cyclictest121750irq/30-eth0_g0_23:25:061
20879994221cyclictest0-21swapper/120:59:591
2087999422cyclictest788-21/usr/sbin/munin20:00:011
2087999422cyclictest788-21/usr/sbin/munin20:00:011
2087999421cyclictest7646-21grep20:25:091
2087999421cyclictest24337-21grep23:45:091
2087999421cyclictest13283-21unixbench_singl23:00:071
121750420irq/30-eth0_g0_121ksoftirqd/119:54:471
121650420irq/29-eth0_g0_2087999cyclictest20:20:021
121650420irq/29-eth0_g0_13-21kworker/0:123:19:570
121650420irq/29-eth0_g0_13-21kworker/0:122:38:200
121650420irq/29-eth0_g0_13-21kworker/0:100:10:210
121420ksoftirqd/12087999cyclictest00:09:581
121420ksoftirqd/1121750irq/30-eth0_g0_22:19:460
121420ksoftirqd/1121650irq/29-eth0_g0_21:09:461
121420ksoftirqd/1121650irq/29-eth0_g0_19:30:031
20879994120cyclictest17920-21diskmemload21:58:411
2087999411cyclictest13100-21/usr/sbin/munin20:50:071
201532410sleep0121750irq/30-eth0_g0_21:17:110
121750410irq/30-eth0_g0_17324-21sendmail_mailqu21:05:070
121750410irq/30-eth0_g0_1219-21kworker/1:223:06:051
121650410irq/29-eth0_g0_9245-21/usr/sbin/munin22:45:010
121650410irq/29-eth0_g0_28890-21which19:40:060
121650410irq/29-eth0_g0_1875-21runrttasks23:09:140
121650410irq/29-eth0_g0_1875-21runrttasks19:10:180
121650410irq/29-eth0_g0_13-21kworker/0:100:07:400
121410ksoftirqd/1121750irq/30-eth0_g0_21:45:050
121410ksoftirqd/1121750irq/30-eth0_g0_00:24:580
2087999408cyclictest121750irq/30-eth0_g0_20:35:081
20879994020cyclictest0-21swapper/121:35:011
2087999402cyclictest5153-21grep20:15:081
2087999402cyclictest29662chrt20:07:121
2087999402cyclictest29468-21munin-run19:44:461
2087999401cyclictest25803-21latency_hist19:29:471
121750400irq/30-eth0_g0_23036-21unixbench_multi23:40:080
121750400irq/30-eth0_g0_2258-21if_eth020:04:590
121750400irq/30-eth0_g0_2087999cyclictest20:40:051
121750400irq/30-eth0_g0_2087999cyclictest20:40:051
121750400irq/30-eth0_g0_1875-21runrttasks00:04:290
121650400irq/29-eth0_g0_2087999cyclictest19:45:071
121650400irq/29-eth0_g0_13-21kworker/0:122:07:350
20879993923cyclictest14868-21wc20:55:061
121750390irq/30-eth0_g0_27730-21grep19:35:070
121750390irq/30-eth0_g0_1875-21runrttasks21:02:320
121750390irq/30-eth0_g0_1875-21runrttasks20:10:210
121750390irq/30-eth0_g0_0-21swapper/021:25:000
121650390irq/29-eth0_g0_24655-21cpu19:24:570
121650390irq/29-eth0_g0_1875-21runrttasks19:15:180
121650390irq/29-eth0_g0_13-21kworker/0:122:31:450
121650390irq/29-eth0_g0_13-21kworker/0:121:59:030
121650390irq/29-eth0_g0_13-21kworker/0:121:30:030
121650390irq/29-eth0_g0_13-21kworker/0:100:31:550
121390ksoftirqd/1121650irq/29-eth0_g0_23:15:010
121750380irq/30-eth0_g0_9709-21memory20:35:010
121750380irq/30-eth0_g0_0-21swapper/019:32:350
121650380irq/29-eth0_g0_30498-21/usr/sbin/munin22:00:000
121650380irq/29-eth0_g0_23654-21seq19:19:590
121650380irq/29-eth0_g0_20246-21/usr/sbin/munin23:30:010
121650380irq/29-eth0_g0_1875-21runrttasks22:14:220
121650380irq/29-eth0_g0_1875-21runrttasks20:16:580
121650380irq/29-eth0_g0_14866-21find20:55:060
121650380irq/29-eth0_g0_13-21kworker/0:123:36:570
121650380irq/29-eth0_g0_13-21kworker/0:121:24:170
121650380irq/29-eth0_g0_11299-21unixbench_multi20:40:080
121650380irq/29-eth0_g0_11299-21unixbench_multi20:40:080
121380ksoftirqd/1121750irq/30-eth0_g0_21:35:010
121380ksoftirqd/1121750irq/30-eth0_g0_21:35:010
121750370irq/30-eth0_g0_20430-21unixbench_singl19:05:071
121650370irq/29-eth0_g0_7194-21iostat20:25:010
121650370irq/29-eth0_g0_32432-21if_eth000:19:590
121650370irq/29-eth0_g0_30164-21wc19:45:080
121650370irq/29-eth0_g0_1875-21runrttasks20:19:520
121750360irq/30-eth0_g0_1875-21runrttasks19:53:040
121650360irq/29-eth0_g0_8369-21sed22:40:080
121650360irq/29-eth0_g0_32075-21df19:54:580
121650360irq/29-eth0_g0_0-21swapper/021:10:110
121750350irq/30-eth0_g0_12417-21sendmail_mailst20:45:050
121650350irq/29-eth0_g0_1243-21open_inodes20:00:040
121650350irq/29-eth0_g0_1243-21open_inodes20:00:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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