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2026-05-14 - 02:57

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 rackcslot7s.osadl.org (updated Wed May 13, 2026 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
236006021330,3sleep23056-21PK-Backend11:45:192
226527821250,2sleep10-21swapper/107:20:121
227227721140,4sleep00-21swapper/007:40:000
236482721010,4sleep33056-21PK-Backend12:00:123
225941828152,17sleep10-21swapper/107:05:131
139099750,65rtkit-daemon0-21swapper/007:08:370
225941026444,14sleep30-21swapper/307:05:063
226062026243,13sleep20-21swapper/207:06:352
22741222610,3sleep33056-21PK-Backend07:45:013
23681812530,4sleep23056-21PK-Backend12:10:132
22974102510,3sleep30-21swapper/308:50:133
22706102510,4sleep20-21swapper/207:35:012
23770852430,4sleep22261020-21cyclictest12:35:162
2261030994312,10cyclictest2307419-21apt-key09:20:001
226103099326,11cyclictest2275595-21seq07:49:341
226103099305,13cyclictest2343050-21cat11:00:011
226103099299,6cyclictest2313079-21runrttasks09:34:531
23144142280,4sleep20-21swapper/209:35:222
226103099289,11cyclictest2305584-21runrttasks09:14:281
226103099284,15cyclictest0-21swapper/111:05:121
139099280,4rtkit-daemon1389-21rtkit-daemon07:15:361
2261033992713,12cyclictest2291283-21unin-run08:35:002
2261033992712,14cyclictest1095-21runrttasks07:44:552
226103099274,9cyclictest0-21swapper/111:25:121
226103099265,8cyclictest0-21swapper/108:45:111
2261030992614,10cyclictest2303934-21basename09:10:011
139099260,3rtkit-daemon1389-21rtkit-daemon08:00:421
226103399259,3cyclictest978-21snmpd08:37:242
226103399259,3cyclictest2286047-21sh08:20:002
226103399257,3cyclictest0-21swapper/208:09:582
226103399256,5cyclictest2283328-21cut08:10:162
226103399254,5cyclictest2305193-21grep09:10:212
2261033992520,4cyclictest0-21swapper/212:28:352
226103399251,8cyclictest2334218-21munin-run10:34:592
2261033992510,4cyclictest2298692-21cron08:55:002
226103399250,23cyclictest0-21swapper/211:59:082
226103099259,14cyclictest2290511-21grep08:30:181
2261030992514,9cyclictest2331950-21find10:25:211
2261030992514,8cyclictest436-20systemd-journal07:32:351
2261030992512,11cyclictest2337683-21awk10:44:591
139099250,3rtkit-daemon1389-21rtkit-daemon09:32:270
2261035992417,5cyclictest42-21ksoftirqd/308:13:083
226103399246,5cyclictest2267722-21cut07:25:212
226103399244,7cyclictest1-21systemd08:44:592
226103399241,7cyclictest2370138-21irqstats12:15:152
226103399241,7cyclictest2329012-21perf10:20:012
2261030992420,3cyclictest0-21swapper/110:03:131
226103399239,5cyclictest2316169-21cut09:40:212
226103399239,2cyclictest2263426-21/usr/sbin/munin07:15:192
226103399238,3cyclictest2353647-21latency_hist11:30:002
226103399237,3cyclictest2361194-21expr11:50:112
226103399233,9cyclictest2343859-21ntpq11:00:172
226103399231,8cyclictest2262091-21python307:10:212
2261033992318,4cyclictest0-21swapper/210:22:372
2261033992318,4cyclictest0-21swapper/209:25:452
2261033992310,11cyclictest2288029-21acpi08:25:112
226103399230,8cyclictest1095-21runrttasks08:20:222
226103399230,21cyclictest2347736-21/usr/sbin/munin11:10:212
226103099235,6cyclictest2328281-21ps10:15:181
2261030992314,6cyclictest436-20systemd-journal08:20:011
2261030992313,8cyclictest2314877-21apt-config09:40:011
226103099230,9cyclictest2156-21gnome-shell12:06:081
2261035992220,1cyclictest3056-21PK-Backend07:18:383
2261035992219,2cyclictest3056-21PK-Backend08:46:533
2261035992219,2cyclictest3056-21PK-Backend07:45:013
2261035992218,2cyclictest3056-21PK-Backend11:08:343
226103599220,20cyclictest3056-21PK-Backend12:17:013
226103599220,20cyclictest3056-21PK-Backend10:04:463
226103399229,2cyclictest1-21systemd10:10:002
226103399225,4cyclictest2322320-21cpu10:00:112
226103399222,4cyclictest2351211-21python311:20:222
2261033992220,1cyclictest0-21swapper/212:22:542
226103399221,8cyclictest2306289-21diskstats09:15:152
226103399221,7cyclictest2376352-21munin-run12:35:002
226103399221,7cyclictest2355085-21wc11:30:212
226103399221,7cyclictest2355085-21wc11:30:212
226103399220,8cyclictest2269392-21ntp_states07:30:192
226103399220,20cyclictest3056-21PK-Backend10:46:232
226103399220,20cyclictest0-21swapper/209:33:142
226103099229,11cyclictest2347885-21timerwakeupswit11:10:231
226103099228,12cyclictest2376663-21sort12:35:111
226103099224,7cyclictest0-21swapper/107:50:421
226103099223,7cyclictest0-21swapper/111:30:021
226103099223,7cyclictest0-21swapper/111:30:011
226103099222,2cyclictest0-21swapper/111:15:111
2261030992214,6cyclictest2289508-21cron08:29:591
2261030992213,7cyclictest2332885-21grep10:30:131
2261030992212,9cyclictest1-21systemd12:05:001
2261030992212,8cyclictest2363180-21if_enp2s011:55:141
2261030992212,8cyclictest2322015-21cron10:00:011
2261030992212,8cyclictest2313739-21kworker/u8:010:45:201
2261030992212,7cyclictest2293022-21gpgv08:40:011
2261030992211,9cyclictest2307846-21gdbus09:20:011
2261030992211,9cyclictest2278446-21processes07:55:191
2261026992220,1cyclictest0-21swapper/012:16:110
2261026992220,1cyclictest0-21swapper/012:06:520
2261026992220,1cyclictest0-21swapper/011:29:200
2261026992220,1cyclictest0-21swapper/008:41:300
2261026992220,1cyclictest0-21swapper/008:05:330
2261026992212,8cyclictest883-21dbus-daemon09:03:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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