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2026-01-07 - 17:41

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 Jan 07, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
225757421240,7sleep2331rcuc/207:05:122
23539272770,3sleep00-21swapper/011:35:130
197399750,14rtkit-daemon4497-21PK-Backend10:13:361
197399710,4rtkit-daemon4497-21PK-Backend09:22:050
197399710,4rtkit-daemon0-21swapper/011:20:200
225829227045,16sleep10-21swapper/107:05:241
22611372650,5sleep10-21swapper/107:15:031
225781026343,12sleep30-21swapper/307:05:133
23711072620,13chrt2371109-21cpuspeed_turbos12:25:143
225865326141,14sleep00-21swapper/007:06:020
197399600,8rtkit-daemon1972-21rtkit-daemon09:35:290
197399590,9rtkit-daemon1972-21rtkit-daemon10:23:190
197399580,9rtkit-daemon1972-21rtkit-daemon09:10:231
197399580,8rtkit-daemon1972-21rtkit-daemon07:19:150
197399570,8rtkit-daemon1972-21rtkit-daemon08:40:190
197399560,9rtkit-daemon1972-21rtkit-daemon09:06:240
225912299530,48cyclictest1972-21rtkit-daemon09:55:220
197399530,8rtkit-daemon1972-21rtkit-daemon09:56:521
197399530,8rtkit-daemon1972-21rtkit-daemon09:17:191
2259131995220,10cyclictest2321294-21systemd-udevd10:03:292
197399520,8rtkit-daemon1972-21rtkit-daemon11:31:051
2259127995010,19cyclictest26-21ksoftirqd/111:55:131
225912299500,46cyclictest1972-21rtkit-daemon10:49:080
197399500,6rtkit-daemon1972-21rtkit-daemon07:26:071
2259127994919,26cyclictest2286095-21/usr/sbin/munin08:25:271
23455742480,9sleep126-21ksoftirqd/111:10:301
23543442470,6sleep30-21swapper/311:35:243
225912299470,43cyclictest1972-21rtkit-daemon11:32:190
225912299470,43cyclictest1972-21rtkit-daemon10:06:130
2259131994522,10cyclictest34-21ksoftirqd/210:15:162
2259122994526,15cyclictest1-21systemd10:20:010
2259133994425,15cyclictest1054-21snmpd07:48:153
23399462430,5sleep2331rcuc/210:55:302
2259122994327,12cyclictest2321450-21cron10:05:000
2259133994229,9cyclictest42-21ksoftirqd/311:28:363
2259133994218,20cyclictest2306884-21sshd09:20:453
2259131994222,17cyclictest2347379-21sshd11:15:462
22903402410,17sleep234-21ksoftirqd/208:35:252
2259133994122,15cyclictest42-21ksoftirqd/311:55:133
2259133994122,13cyclictest42-21ksoftirqd/309:25:463
2259133994116,21cyclictest2294512-21latency_hist08:50:033
2259131994122,6cyclictest34-21ksoftirqd/207:45:012
2259127994124,12cyclictest438-20systemd-journal07:44:591
2259127994120,12cyclictest26-21ksoftirqd/107:55:161
225912299412,20cyclictest438-20systemd-journal10:55:000
225912299411,11cyclictest2351596-21turbostat11:29:590
2259133994023,13cyclictest42-21ksoftirqd/310:20:273
2259133994023,13cyclictest42-21ksoftirqd/307:37:593
2259133994023,13cyclictest42-21ksoftirqd/307:37:583
2259133994021,15cyclictest1054-21snmpd09:13:313
2259133994019,18cyclictest1054-21snmpd08:38:243
2259131994024,12cyclictest923-21dbus-daemon08:45:002
2259131994022,12cyclictest2308620-21systemd-udevd09:25:452
2259131994012,8cyclictest34-21ksoftirqd/211:23:072
2259127994021,12cyclictest26-21ksoftirqd/111:24:271
225912299402,11cyclictest2366118-21df_inode12:10:140
225912299402,11cyclictest2366118-21df_inode12:10:140
2259133993927,7cyclictest2276107-21grep07:55:223
2259133993922,5cyclictest42-21ksoftirqd/309:45:033
2259133993922,5cyclictest42-21ksoftirqd/309:45:023
2259133993920,14cyclictest42-21ksoftirqd/311:20:003
2259131993926,9cyclictest2372392-21cron12:30:002
2259131993923,12cyclictest1-21systemd07:50:012
2259131993913,9cyclictest34-21ksoftirqd/207:33:372
225912799395,5cyclictest141rcu_preempt08:00:221
225912799395,5cyclictest141rcu_preempt08:00:221
2259127993922,13cyclictest1-21systemd10:40:001
225912299395,7cyclictest2333588-21turbostat10:40:000
225912299392,32cyclictest2297144-21df_inode08:55:160
2259122993913,7cyclictest23437962cat11:05:300
2259133993826,8cyclictest2280346-21cron08:09:593
2259133993824,6cyclictest42-21ksoftirqd/309:48:353
2259133993820,14cyclictest42-21ksoftirqd/307:55:003
2259133993817,17cyclictest1054-21snmpd08:23:223
2259133993816,12cyclictest42-21ksoftirqd/312:05:133
2259131993821,12cyclictest2282080-21apt-get08:15:002
2259131993820,13cyclictest438-20systemd-journal07:39:592
2259131993820,13cyclictest438-20systemd-journal07:39:592
225913199381,33cyclictest2293418-21df_inode08:45:142
2259127993827,7cyclictest2323194-21cron10:10:011
225912799381,6cyclictest141rcu_preempt10:03:301
2259127993814,5cyclictest141rcu_preempt10:15:471
2259127993811,6cyclictest141rcu_preempt09:25:461
225912299383,12cyclictest13-21ksoftirqd/009:45:030
225912299383,12cyclictest13-21ksoftirqd/009:45:020
2259122993826,7cyclictest2359529-21ntp_states11:50:250
225912299382,15cyclictest2340494-21apt-get11:00:070
2259122993821,13cyclictest2347816-21munin-run11:20:010
2259122993821,12cyclictest2329380-21ntpq10:25:240
197399380,31rtkit-daemon1920-21kerneloops12:01:511
2259133993719,12cyclictest2291794-21awk08:40:203
2259133993718,15cyclictest1054-21snmpd07:13:083
2259133993718,15cyclictest1054-21snmpd07:13:083
2259133993716,13cyclictest42-21ksoftirqd/310:05:003
225913399371,21cyclictest141rcu_preempt11:40:463
225913399371,13cyclictest23455732cat11:10:313
2259133993710,23cyclictest2266442-21cron07:30:003
2259131993725,9cyclictest34-21ksoftirqd/211:28:362
2259131993724,9cyclictest2313407-21needreboot09:40:232
2259131993724,9cyclictest2313407-21needreboot09:40:232
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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