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2026-06-27 - 19:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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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Click here to display the system's profile data or here to proceed to next system.
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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack2slot7s.osadl.org (updated Sat Jun 27, 2026 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2036922995226,23cyclictest2144501-21latency11:05:290
2036924995026,3cyclictest0-21swapper/212:00:352
2036924994923,3cyclictest0-21swapper/210:45:402
2036924994921,7cyclictest2080241-21sh09:20:462
2036923994935,10cyclictest1003-21mta-sts-daemon12:09:141
2036923994838,6cyclictest420-21avahi-daemon09:59:521
2036924994724,3cyclictest0-21swapper/210:50:392
2036924994722,4cyclictest2143780-21latency_hist11:05:022
2036923994735,9cyclictest2159786-21kernelversion11:30:291
203692299462,16cyclictest2193731-21ntpq12:25:320
203692299462,15cyclictest421-21dbus-daemon09:40:370
2036922994621,22cyclictest2129867-21timerwakeupswit10:40:440
203692299461,17cyclictest2101886-21ntpq09:55:380
2036922994538,4cyclictest2106866-21cron10:05:010
2036922994438,4cyclictest70-21kswapd009:30:350
2036922994425,16cyclictest2201900-21sendmail12:40:010
2036922994425,16cyclictest2201900-21sendmail12:40:010
2036924994334,6cyclictest2085374-21latency_hist09:30:022
2036922994336,4cyclictest2162070-21systemd-run11:35:010
2036922994330,4cyclictest2076004-21cron09:15:000
2036922994330,4cyclictest2076004-21cron09:15:000
203692299432,5cyclictest2089403-21ntpq09:35:330
203692299431,11cyclictest2052876-21ntpq08:00:350
203692499422,31cyclictest2187652-21ssh12:15:342
2036923994234,5cyclictest2128294-21ssh10:40:001
203692299422,6cyclictest2040891-21ntpq07:20:360
2036924994133,5cyclictest2051912-21idleruntime-cro08:00:012
2036923994132,5cyclictest1001-21mta-sts-daemon10:43:091
2036923994118,13cyclictest420-21avahi-daemon09:35:401
2036922994134,4cyclictest151ktimers/012:20:310
2036922994129,6cyclictest151ktimers/007:35:350
203692299411,14cyclictest2072410-21ntpq09:05:380
203692299411,12cyclictest2135548-21ntpq10:50:350
203692299411,11cyclictest2083093-21missed_timers09:25:310
2036923994032,5cyclictest2186658-21latency_hist12:15:021
2036923994032,5cyclictest2140575-21munin-plugin-st11:00:011
2036923994032,4cyclictest2195781-21cron12:30:011
203692299406,5cyclictest2054489-21/usr/sbin/munin08:05:380
203692299403,8cyclictest2039332-21ntpq07:15:350
203692299402,7cyclictest2055806-21ntpq08:10:340
203692299402,5cyclictest2069387-21ntpq08:55:360
203692299402,5cyclictest2043819-21ntpq07:30:330
203692299402,5cyclictest2043819-21ntpq07:30:330
203692299401,6cyclictest2114103-21ntpq10:15:340
203692299401,6cyclictest2114103-21ntpq10:15:340
203692299401,5cyclictest2057310-21ntpq08:15:330
2036922994012,25cyclictest2137846-21/usr/sbin/munin10:55:280
203692299401,11cyclictest2037542-21irqstats07:10:290
203692499397,27cyclictest750-21ntpd07:15:312
2036924993932,4cyclictest2086927-21head09:30:432
2036924993931,5cyclictest2128309-21munin-run10:40:012
2036923993931,5cyclictest2057932-21idleruntime-cro08:20:011
203692299395,4cyclictest2120154-21ntpq10:25:320
203692299395,4cyclictest2120154-21ntpq10:25:320
2036922993931,4cyclictest151ktimers/007:25:300
2036922993931,4cyclictest151ktimers/007:25:300
2036922993929,6cyclictest151ktimers/008:35:350
203692299392,5cyclictest2061849-21ntpq08:30:390
2036922993924,8cyclictest2178410-21sh12:00:320
203692299391,9cyclictest2186967-21aten_r2power_en12:15:220
203692299391,9cyclictest2067808-21ntpq08:50:350
2036922993918,19cyclictest0-21swapper/010:10:230
203692299391,7cyclictest2048326-21ntpq07:45:320
203692299391,16cyclictest2141804-21ps11:00:400
203692299391,12cyclictest2181455-21ntpq12:05:320
203692299391,11cyclictest2049411-21diskstats07:50:240
203692299391,10cyclictest2050896-21df07:55:240
203692299390,11cyclictest2167420-21ssh11:42:400
2036924993828,7cyclictest1236063-21cups-browsed12:33:292
2036923993831,4cyclictest1000-21mta-sts-daemon11:50:331
2036923993828,4cyclictest0-21swapper/111:40:361
2036923993810,24cyclictest2123284-21ssh10:30:331
2036923993810,24cyclictest2123284-21ssh10:30:331
203692299383,8cyclictest2064800-21ntpq08:40:320
2036922993829,6cyclictest1000-21mta-sts-daemon08:45:380
203692299382,6cyclictest2175332-21ntpq11:55:320
203692299382,6cyclictest2077039-21ntpq09:15:310
2036922993822,11cyclictest12650irq/32-eth010:45:340
2036922993817,18cyclictest2059420-21cron08:25:010
203692299381,5cyclictest2098712-21ntpq09:50:340
203692299381,4cyclictest2107934-21ntpq10:05:330
203692299381,12cyclictest2060350-21ntpq08:25:350
203692299381,12cyclictest2046833-21ntpq07:40:340
203692299381,11cyclictest2169317-21ssh11:45:370
203692299381,11cyclictest2127277-21ssh10:36:490
203692299380,15cyclictest2095632-21ssh09:45:330
2036924993726,4cyclictest0-21swapper/209:45:342
2036923993730,4cyclictest2122250-21latency_hist10:30:011
2036923993730,4cyclictest2122250-21latency_hist10:30:011
2036923993729,5cyclictest2198826-21idleruntime-cro12:35:011
2036923993729,3cyclictest0-21swapper/110:05:021
2036923993728,6cyclictest421-21dbus-daemon09:50:011
2036923993727,7cyclictest265-21systemd-journal07:20:011
203692299378,3cyclictest2164053-21ssh11:36:460
203692299372,7cyclictest2157068-21ntpq11:25:380
2036922993719,14cyclictest0-21swapper/011:15:210
2036922993716,18cyclictest0-21swapper/011:50:200
203692299371,11cyclictest2123299-21ntpq10:30:340
203692299371,11cyclictest2123299-21ntpq10:30:340
2036924993630,3cyclictest0-21swapper/210:15:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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