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2026-07-20 - 05:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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: 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 rack4slot1s.osadl.org (updated Mon Jul 20, 2026 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3091821000,3sleep130043-21/usr/sbin/munin00:23:471
3091821000,3sleep130043-21/usr/sbin/munin00:23:471
3091821000,3sleep130043-21/usr/sbin/munin00:23:471
133822960,2sleep10-21swapper/120:43:451
133822960,2sleep10-21swapper/120:43:451
303612770,3sleep20-21swapper/220:03:382
303612770,3sleep20-21swapper/220:03:382
160282770,2sleep116027-21head22:18:401
160282770,2sleep116027-21head22:18:401
93012720,3sleep20-21swapper/220:33:412
93012720,3sleep20-21swapper/220:33:412
57602710,2sleep05761-21cat23:18:370
57602710,2sleep05761-21cat23:18:370
57602710,2sleep05761-21cat23:18:370
255662630,2sleep125565-21grep21:18:351
239092630,2sleep122417-40mandb00:04:101
239092630,2sleep122417-40mandb00:04:101
88572600,3chrt0-21swapper/223:23:502
88572600,3chrt0-21swapper/223:23:502
88572600,3chrt0-21swapper/223:23:502
254752580,1sleep025476-21latency_hist21:18:310
39902560,3sleep30-21swapper/320:18:473
39902560,3sleep30-21swapper/320:18:473
39902560,3sleep30-21swapper/320:18:473
17592500,3chrt11523-21cyclictest00:33:391
17592500,3chrt11523-21cyclictest00:33:391
17592500,3chrt11523-21cyclictest00:33:391
319482490,2chrt0-21swapper/121:33:461
319482490,2chrt0-21swapper/121:33:461
319482490,2chrt0-21swapper/121:33:461
25432490,3sleep20-21swapper/200:33:492
25432490,3sleep20-21swapper/200:33:492
25432490,3sleep20-21swapper/200:33:492
168032470,3sleep20-21swapper/222:18:502
168032470,3sleep20-21swapper/222:18:502
101382450,2sleep110139-21uname23:28:431
101382450,2sleep110139-21uname23:28:431
305872440,2sleep10-21swapper/120:03:431
305872440,2sleep10-21swapper/120:03:431
11535994437,3cyclictest0-21swapper/000:03:400
11535994437,3cyclictest0-21swapper/000:03:400
177042430,3sleep017862-21tr22:23:390
177042430,3sleep017862-21tr22:23:390
118432430,2sleep011945-21/usr/sbin/munin23:33:420
81862420,2sleep30-21swapper/323:23:433
81862420,2sleep30-21swapper/323:23:433
81862420,2sleep30-21swapper/323:23:433
11535994133,6cyclictest0-21swapper/000:03:300
326542400,3sleep00-21swapper/020:08:520
326542400,3sleep00-21swapper/020:08:520
326542400,3sleep00-21swapper/020:08:520
1153599403,33cyclictest23080-21if_wlan000:03:420
1153599403,33cyclictest23080-21if_wlan000:03:420
11543993729,6cyclictest550-21cron23:53:261
11543993729,6cyclictest550-21cron23:53:261
1156699352,21cyclictest22473-21chrt00:03:303
1156699352,21cyclictest22473-21chrt00:03:303
1156699352,21cyclictest22473-21chrt00:03:303
11535993529,5cyclictest1354-21netstat21:38:450
11535993529,5cyclictest1354-21netstat21:38:450
11535993529,5cyclictest1354-21netstat21:38:450
288482340,2sleep30-21swapper/300:18:423
288482340,2sleep30-21swapper/300:18:423
288482340,2sleep30-21swapper/300:18:423
11543993326,5cyclictest21023-21gltestperf23:58:391
11543993326,5cyclictest21023-21gltestperf23:58:391
11543993226,4cyclictest10215-21fschecks_count22:03:371
11543993224,6cyclictest24068-21mailstats22:38:471
11543993224,6cyclictest24068-21mailstats22:38:471
11543993224,6cyclictest24068-21mailstats22:38:471
11535993223,7cyclictest8822-21needreboot21:58:450
11535993223,7cyclictest8822-21needreboot21:58:450
7432310,3sleep20-21swapper/223:03:442
7432310,3sleep20-21swapper/223:03:442
7432310,3sleep20-21swapper/223:03:442
118302310,2chrt11831-21cut22:08:311
118302310,2chrt11831-21cut22:08:311
11543993125,4cyclictest4670-21kworker/u9:0-xprtiod23:48:261
11543993125,4cyclictest4670-21kworker/u9:0-xprtiod23:48:261
11543993125,4cyclictest4670-21kworker/u9:0-xprtiod23:48:261
11543993124,5cyclictest18950-21fschecks_time19:33:401
11543993124,5cyclictest18950-21fschecks_time19:33:401
11535993126,3cyclictest3196-21df_inode20:18:380
11535993126,3cyclictest3196-21df_inode20:18:380
11535993126,3cyclictest3196-21df_inode20:18:380
11535993124,6cyclictest7030-21ntp_offset21:53:450
11535993124,6cyclictest7030-21ntp_offset21:53:450
169262300,3sleep20-21swapper/220:53:432
169262300,3sleep20-21swapper/220:53:432
169262300,3sleep20-21swapper/220:53:432
11543993025,4cyclictest999-21gltestperf21:38:401
11543993025,4cyclictest999-21gltestperf21:38:401
11543993025,4cyclictest999-21gltestperf21:38:401
11543993022,6cyclictest21857-21unixbench-2d23:58:481
11543993022,6cyclictest21857-21unixbench-2d23:58:481
11543993022,6cyclictest21857-21unixbench-2d23:58:481
11535993023,5cyclictest2850-21sshd00:36:170
11535993023,5cyclictest2850-21sshd00:36:170
11535993023,5cyclictest2850-21sshd00:36:170
11535993023,5cyclictest11523-21cyclictest19:25:390
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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