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2025-08-29 - 12:02

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

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 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.

Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot6s.osadl.org (updated Fri Aug 29, 2025 00:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2221522370,3sleep022218-21fgrep00:15:280
2977622290,3sleep029777-21cat20:35:000
44821380,2sleep0447-21switchtime20:45:280
2373021320,2sleep023727-21ps20:10:270
2508221290,3sleep025084-21sed22:20:350
251321280,4chrt2514-21/usr/sbin/munin23:00:160
2367521280,4chrt23676-21timerandwakeup00:20:300
1327821150,4sleep013282-21ntp_states19:30:220
841621070,3sleep08417-21users19:10:330
225332965,9sleep022589-21switchtime20:05:280
259802920,4sleep026029-21df20:20:130
65172910,3sleep06529-21cpu19:05:130
237132905,11sleep022189-21snmpd22:15:300
196662906,11sleep019678-21dpkg19:55:240
70612896,11sleep07062-21sshd21:10:400
105152896,11sleep010519-21memory21:25:190
156452830,3sleep015675-21/usr/sbin/munin23:50:260
274642805,10sleep027268-21/usr/sbin/munin20:25:230
44462786,60sleep04451-21vmstat21:00:330
312312780,4sleep031274-21ntpq22:45:200
160272780,3sleep016028-21/usr/sbin/munin19:40:270
50042745,57sleep05040-21cpu23:10:120
771999619,18cyclictest12982-21/usr/sbin/munin21:35:180
7719996110,17cyclictest17342-21/usr/sbin/munin19:45:280
7719996110,17cyclictest10183-21/usr/sbin/munin23:30:200
294882613,8sleep00-21swapper22:39:260
7719996011,16cyclictest21087-21ntp_states20:00:240
7719996010,17cyclictest18814-21sshd21:56:410
771999599,17cyclictest10427-21/usr/sbin/munin19:20:200
771999598,19cyclictest14214-21/usr/sbin/munin21:40:270
771999598,18cyclictest3723-21/usr/sbin/munin23:05:280
771999598,16cyclictest30008-21grep22:40:200
771999597,19cyclictest20675-21/usr/sbin/munin22:05:160
7719995936,13cyclictest1321-21df_inode20:50:160
771999589,17cyclictest5198-21df21:05:140
771999589,16cyclictest18212-21chrt19:50:150
771999589,16cyclictest14349-21ntp_states23:45:240
771999589,15cyclictest17221-21users23:55:290
7719995834,14cyclictest11960-21/usr/sbin/munin21:30:270
7719995822,13cyclictest1823-21seq22:56:200
771999579,17cyclictest9396-21ntp_states19:15:240
771999577,22cyclictest30078-21netstat20:35:210
7719995736,13cyclictest7926-21/usr/sbin/munin21:15:240
7719995732,16cyclictest9116-21df_inode21:20:180
7719995731,16cyclictest26242-21/usr/sbin/munin22:25:250
7719995715,14cyclictest370-21ntpd20:55:200
7719995711,15cyclictest13329-21/usr/sbin/munin23:40:290
771999569,18cyclictest7674-21chrt23:20:150
771999569,18cyclictest12632-21idleruntime-cro23:40:010
771999569,16cyclictest20521-21/usr/sbin/munin00:10:250
771999569,15cyclictest21951-21/usr/sbin/munin22:10:290
771999568,17cyclictest14325-21chrt19:35:130
7719995632,16cyclictest19573-21/usr/sbin/munin00:05:280
7719995632,15cyclictest18028-21/usr/sbin/munin00:00:140
7719995631,15cyclictest7405-21sshd23:19:390
7719995631,15cyclictest12030-21/usr/sbin/munin19:25:240
7719995610,18cyclictest1085-21ls22:55:020
771999559,16cyclictest24476-21chrt00:25:140
771999558,16cyclictest16884-21basename21:50:210
771999556,16cyclictest27504-21grep00:35:340
7719995532,14cyclictest19973-21/usr/sbin/munin22:00:310
7719995510,15cyclictest27138-21/usr/sbin/munin22:30:300
771999548,15cyclictest25745-21/usr/sbin/munin00:30:120
771999547,17cyclictest24658-21/usr/sbin/munin20:15:160
7719995432,14cyclictest10128-21latency_hist23:30:020
7719995432,13cyclictest31226-21/usr/sbin/munin20:40:150
7719995410,17cyclictest15762-21grep21:45:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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