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2026-04-24 - 12:23

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 rack7slot7s.osadl.org (updated Fri Apr 24, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1530321140,0sleep00-21swapper/021:17:350
821429986,9sleep00-21swapper/019:06:010
848829170,16sleep20-21swapper/219:09:332
837328666,15sleep10-21swapper/119:08:031
835028559,9sleep30-21swapper/319:07:463
204322470,0sleep20-21swapper/221:59:532
861299221,20cyclictest4875-21latency_hist22:10:011
861299220,22cyclictest0-21swapper/100:16:491
861799201,1cyclictest0-21swapper/321:37:013
861799200,17cyclictest0-21swapper/323:21:113
8612992020,0cyclictest0-21swapper/123:22:151
3432200,0sleep20-21swapper/200:03:472
8617991912,3cyclictest9137-21ssh23:10:203
861499191,18cyclictest0-21swapper/222:37:292
861299191,15cyclictest38150irq/131-snd_hda23:40:141
861299191,15cyclictest38150irq/131-snd_hda23:40:131
861499180,17cyclictest0-21swapper/222:44:572
8617991716,1cyclictest0-21swapper/300:11:143
861799170,2cyclictest0-21swapper/300:18:443
8612991715,2cyclictest25-21ksoftirqd/121:54:031
861299170,1cyclictest0-21swapper/120:30:131
861299170,17cyclictest0-21swapper/100:00:451
861299170,16cyclictest0-21swapper/122:59:421
860799170,17cyclictest0-21swapper/000:38:380
861799164,11cyclictest0-21swapper/321:19:223
861799161,14cyclictest27966-21ssh22:23:323
8614991615,1cyclictest0-21swapper/222:20:372
8614991614,1cyclictest0-21swapper/222:25:132
861499160,16cyclictest0-21swapper/200:21:152
861499160,13cyclictest0-21swapper/220:00:122
861499160,11cyclictest0-21swapper/200:35:192
861299160,8cyclictest537-21snmpd21:26:591
861299160,16cyclictest0-21swapper/123:55:171
860799164,6cyclictest20626-21sendmail22:00:010
860799161,14cyclictest0-21swapper/021:30:150
861799151,11cyclictest0-21swapper/320:40:123
861799150,15cyclictest0-21swapper/323:47:563
861499157,5cyclictest11098-21cron21:35:002
861499151,13cyclictest351-21apache_processe23:25:122
8614991511,2cyclictest10522-21sh00:10:002
860799151,7cyclictest5423-21munin-run20:10:010
860799150,1cyclictest0-21swapper/000:17:040
861799142,12cyclictest0-21swapper/323:58:483
8617991411,2cyclictest20754-21grep00:35:163
861799140,14cyclictest0-21swapper/322:58:283
861799140,12cyclictest2119-21/usr/sbin/munin21:10:123
861499140,14cyclictest0-21swapper/200:11:362
861499140,13cyclictest0-21swapper/221:52:332
861299149,4cyclictest31589-21turbostat23:05:001
861299149,3cyclictest21014-21wc20:40:181
861299148,5cyclictest38150irq/131-snd_hda23:31:071
861299142,11cyclictest1142-21runrttasks22:27:401
8612991413,1cyclictest0-21swapper/121:14:511
8612991411,2cyclictest12057-21wc20:20:261
8612991410,3cyclictest22521-21cut22:00:211
8612991410,3cyclictest18290-21grep23:15:261
861299140,13cyclictest0-21swapper/122:37:141
861299140,13cyclictest0-21swapper/100:28:591
860799142,6cyclictest0-21swapper/021:05:130
8607991411,2cyclictest24943-21wc19:40:250
8607991410,3cyclictest396-21grep20:00:010
8607991410,3cyclictest1856-21wc23:25:220
8607991410,3cyclictest14399-21wc20:25:270
860799140,12cyclictest31663-21sleep21:05:010
861799139,3cyclictest22362-21cron22:40:003
861799136,2cyclictest39-21ksoftirqd/322:32:003
861799131,5cyclictest0-21swapper/300:05:133
8617991310,2cyclictest3595-21grep21:30:163
8617991310,2cyclictest31436-21wc22:25:193
8617991310,2cyclictest20923-21grep21:40:173
8617991310,2cyclictest16624-21grep23:15:133
8617991310,2cyclictest0-21swapper/300:00:233
861799130,3cyclictest0-21swapper/300:25:393
861799130,13cyclictest0-21swapper/322:12:323
861499139,3cyclictest32326-21cat22:45:202
8614991310,2cyclictest21515-21cron22:20:012
8614991310,2cyclictest20090-21head00:15:152
861499130,12cyclictest0-21swapper/223:34:032
861299139,3cyclictest7560-21wc23:10:001
861299139,3cyclictest5667-21ssh00:06:191
861299139,2cyclictest8322-21tr20:15:141
8612991310,2cyclictest31287-21tr22:45:141
8612991310,2cyclictest29456-21grep19:50:191
8612991310,2cyclictest14569-21grep22:15:191
8612991310,2cyclictest13597-21head20:25:181
8612991310,2cyclictest10632-21basename21:15:151
861299130,0cyclictest0-21swapper/123:29:031
860799139,3cyclictest10512-21cron00:10:000
860799136,6cyclictest16550-21munin-run23:35:010
860799131,10cyclictest13892-21apt-get19:20:120
8607991310,2cyclictest9038-21grep22:50:250
8607991310,2cyclictest27207-21grep23:40:250
8607991310,2cyclictest27207-21grep23:40:250
8607991310,2cyclictest20980-21sed21:20:260
8607991310,2cyclictest16739-21tr22:55:210
8607991310,2cyclictest15675-21grep22:15:280
8607991310,2cyclictest10942-21cron19:15:000
861799129,2cyclictest694-21grep23:25:163
861799129,2cyclictest30402-21grep21:45:273
861799129,2cyclictest30402-21grep21:45:263
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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