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2026-04-18 - 10:26

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 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.

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 all highest latencies:
System rack4slot6s.osadl.org (updated Sat Apr 18, 2026 00:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2452822460,3sleep024525-21cat23:10:260
2572022360,2sleep025721-21sendmail_mailqu23:15:240
1492821920,4sleep014927-21latency_hist22:35:010
725521310,4chrt7258-21sendmail20:00:010
26155213018,85sleep026209-21users19:05:250
881221180,5chrt8813-21ntp_kernel_pll_22:10:190
1124521160,4chrt11248-21cpu20:15:110
781321150,3chrt7814-21mailstats20:00:250
507421130,4chrt5075-21mailstats21:55:250
3097621130,2sleep030975-21swap23:35:270
1631121120,2sleep016312-21egrep22:40:110
1133721100,4sleep011147-21/usr/sbin/munin22:20:180
330221090,4chrt3303-21if_err_eth023:55:150
1359221080,2chrt13594-21idleruntime-cro22:30:000
2968021000,3sleep029677-21cat19:20:150
218792980,4sleep021466-21/usr/sbin/munin23:00:260
270462920,2sleep027048-21grep21:15:200
6742770,4sleep0700-21cat21:40:020
14872760,3sleep01485-21cat19:35:270
26824996512,20cyclictest21328-21munin-run23:00:000
26824996432,23cyclictest31005-21/usr/sbin/munin21:30:230
26824996120,14cyclictest25808-21awk21:10:230
26824996110,18cyclictest2749-21grep19:40:270
2682499607,20cyclictest29398-21/usr/sbin/munin21:25:250
2682499599,17cyclictest11557-21seq00:25:290
2682499598,19cyclictest18873-21/usr/sbin/munin22:50:260
2682499598,18cyclictest17588-21/usr/sbin/munin22:45:180
26824995933,17cyclictest24294-21/usr/sbin/munin21:05:130
26824995918,13cyclictest12246-21/usr/sbin/munin00:30:150
26824995910,17cyclictest17829-21/usr/sbin/munin20:40:140
26824995910,16cyclictest15465-21ntp_states20:30:240
2682499589,16cyclictest31807-21/usr/sbin/munin23:40:170
2682499589,16cyclictest28115-21/usr/sbin/munin21:20:250
2682499589,16cyclictest21610-21/usr/sbin/munin20:55:180
2682499588,16cyclictest14995-21/usr/sbin/munin22:35:240
2682499587,17cyclictest32092-21/usr/sbin/munin19:30:240
2682499586,17cyclictest3664-21ntp_states21:50:210
26824995834,16cyclictest10553-21/usr/sbin/munin20:10:290
26824995832,16cyclictest29302-21runrttasks19:19:280
26824995812,15cyclictest4504-21/usr/sbin/munin00:00:200
26824995811,17cyclictest6232-21chrt00:05:250
26824995810,15cyclictest8426-21df_inode00:15:150
2682499579,16cyclictest893-21awk23:45:190
2682499578,17cyclictest5966-21/usr/sbin/munin22:00:170
2682499578,16cyclictest13528-21/usr/sbin/munin00:35:200
2682499577,17cyclictest23275-21grep23:05:280
26824995734,14cyclictest13968-21/usr/sbin/munin20:25:130
26824995730,18cyclictest27665-21runrttasks23:23:540
26824995710,15cyclictest20616-21ntp_states20:50:210
26824995710,13cyclictest4791-21/usr/sbin/munin19:50:170
2682499569,19cyclictest10036-21chrt00:20:250
2682499569,13cyclictest7073-21/usr/sbin/munin00:10:130
2682499568,18cyclictest29212-21/usr/sbin/munin23:30:150
2682499568,15cyclictest8736-21df_inode20:05:130
2682499568,15cyclictest7263-21/usr/sbin/munin22:05:200
2682499568,15cyclictest30868-21df_inode19:25:130
2682499567,17cyclictest26925-21/usr/sbin/munin19:10:180
2682499567,15cyclictest27928-21/usr/sbin/munin23:25:130
26824995631,15cyclictest4602-21runrttasks19:49:320
26824995610,18cyclictest10029-21cat22:15:180
26824995610,13cyclictest1981-21/usr/sbin/munin23:50:130
2682499558,14cyclictest2380-21ntp_states21:45:210
2682499558,14cyclictest19045-21/usr/sbin/munin20:45:190
26824995530,15cyclictest16535-21/usr/sbin/munin20:35:140
26824995529,16cyclictest23279-21/usr/sbin/munin21:00:250
2682499547,13cyclictest805-21/usr/sbin/munin21:40:230
2682499537,16cyclictest12607-21/usr/sbin/munin20:20:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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