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2025-11-15 - 11:20

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 50 highest latencies:
System rack7slot7s.osadl.org (updated Sat Nov 15, 2025 00:43:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2882021200,0sleep10-21swapper/100:20:551
19490211176,9sleep30-21swapper/319:07:463
1752829783,9sleep10-21swapper/119:05:061
1949728774,9sleep00-21swapper/019:07:500
1939328164,6sleep20-21swapper/219:06:312
19751992524,1cyclictest39-21ksoftirqd/300:22:573
1974499251,16cyclictest10158-21/usr/sbin/munin23:45:261
71192220,0sleep10-21swapper/122:35:511
1975199223,5cyclictest15312-21ssh21:34:353
1975199223,5cyclictest15312-21ssh21:34:343
1975199221,2cyclictest39-21ksoftirqd/323:30:083
19748992221,1cyclictest0-21swapper/200:11:482
19748992220,1cyclictest3797-21apt-get23:20:012
19744992222,0cyclictest0-21swapper/122:26:261
1975199210,18cyclictest0-21swapper/322:53:123
1974499210,21cyclictest0-21swapper/100:15:041
1974499210,20cyclictest0-21swapper/122:15:171
1973799210,19cyclictest0-21swapper/021:01:290
19748992019,1cyclictest0-21swapper/223:06:302
1974899200,20cyclictest0-21swapper/221:55:552
1974499203,6cyclictest19162-21ls22:00:001
1974499200,17cyclictest0-21swapper/123:59:191
1973799200,18cyclictest0-21swapper/020:58:560
19751991910,9cyclictest39-21ksoftirqd/321:15:153
1974899191,1cyclictest0-21swapper/222:02:152
19744991919,0cyclictest0-21swapper/100:03:481
19744991918,1cyclictest0-21swapper/122:56:141
1975199181,17cyclictest39-21ksoftirqd/323:58:243
1975199181,15cyclictest39-21ksoftirqd/323:01:573
1975199180,2cyclictest0-21swapper/323:35:053
1974899180,18cyclictest0-21swapper/221:35:312
1974499180,0cyclictest0-21swapper/121:45:311
1975199172,2cyclictest141rcu_preempt23:43:453
1975199171,15cyclictest15557-21users20:05:293
1974899171,11cyclictest224-21systemd-journal22:19:452
1974899170,1cyclictest0-21swapper/223:02:532
1974899170,17cyclictest0-21swapper/200:02:502
1974499177,6cyclictest5466-21wget21:50:161
19737991716,1cyclictest0-21swapper/023:15:390
19737991716,1cyclictest0-21swapper/021:36:180
1973799170,1cyclictest0-21swapper/020:35:160
214442160,0chrt0-21swapper/322:00:283
1975199167,7cyclictest0-21swapper/322:55:133
1975199163,2cyclictest141rcu_preempt00:26:193
19751991615,1cyclictest39-21ksoftirqd/323:10:143
19751991612,4cyclictest39-21ksoftirqd/300:36:353
19748991616,0cyclictest0-21swapper/221:40:272
19748991615,1cyclictest32-21ksoftirqd/222:38:562
1974899161,15cyclictest0-21swapper/222:25:142
1974899160,14cyclictest0-21swapper/223:28:522
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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