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2025-07-06 - 00:26

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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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 highest latencies:
System rack4slot6s.osadl.org (updated Sat Jul 05, 2025 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1894422840,3sleep018943-21missed_timers09:45:210
2459622410,2sleep024597-21switchtime08:00:340
2318021420,4chrt22613-21/usr/sbin/munin10:00:300
1467021410,2sleep014673-21wc11:35:130
1756321260,3chrt17562-21/usr/sbin/munin09:40:160
2053521250,4chrt20534-21/usr/sbin/munin07:45:250
1766121220,3chrt17660-21awk07:35:130
2952021110,4sleep029071-21/usr/sbin/munin10:25:290
936621080,2sleep09367-21idleruntime-cro11:15:000
330121080,2sleep03303-21ntpq10:50:220
1505121030,4sleep015112-21grep09:30:220
1215921030,5sleep012165-21/usr/sbin/munin11:25:160
100512990,4sleep010108-21sshd07:05:200
62182840,2sleep06221-21mailstats08:55:260
319002844,10sleep031953-21interrupts08:30:170
175972764,9sleep025266-21snmpd11:45:290
292042705,55sleep029211-21ntp_states12:30:260
309832663,6sleep00-21swapper12:37:010
11061996110,32cyclictest21393-21ntpq12:00:220
1106199609,18cyclictest13810-21/usr/sbin/munin07:20:150
1106199608,17cyclictest26350-21/usr/sbin/munin12:20:270
11061996019,13cyclictest22551-21sshd07:54:210
1106199599,16cyclictest25767-21/usr/sbin/munin08:05:260
1106199598,19cyclictest30534-21/usr/sbin/munin08:25:280
11061995936,14cyclictest7450-21/usr/sbin/munin11:05:320
11061995935,15cyclictest30846-21/usr/sbin/munin10:30:280
11061995935,15cyclictest17400-21latency_hist09:40:010
11061995929,21cyclictest11267-21ntp_states09:15:230
11061995918,15cyclictest2208-21ntpq08:40:230
11061995918,14cyclictest26744-21ls08:10:170
11061995911,17cyclictest13586-21sort11:30:210
11061995910,17cyclictest9496-21/usr/sbin/munin11:15:190
11061995910,17cyclictest27630-21/usr/sbin/munin12:25:280
137892580,5sleep013788-21missed_timers09:25:220
1106199589,17cyclictest1762-21/usr/sbin/munin10:45:300
11061995833,15cyclictest16165-21/usr/sbin/munin11:40:210
11061995810,17cyclictest15189-21irqstats07:25:200
11061995810,16cyclictest4985-21/usr/sbin/munin08:50:290
11061995810,16cyclictest10861-21chrt11:20:110
1106199579,16cyclictest26381-21latency_hist10:15:010
1106199578,19cyclictest28092-21awk10:20:260
1106199578,17cyclictest8398-21/usr/sbin/munin09:05:170
1106199578,17cyclictest31634-21/usr/sbin/munin10:35:170
1106199578,15cyclictest740-21sshd10:40:210
1106199578,15cyclictest18958-21/usr/sbin/munin11:50:290
1106199578,14cyclictest16326-21/usr/sbin/munin07:30:150
1106199577,18cyclictest9688-21/usr/sbin/munin09:10:270
11061995720,13cyclictest11450-21seq07:10:230
11061995717,10cyclictest13362-21sshd09:24:220
11061995711,18cyclictest108-21systemd-journal12:12:230
11061995711,15cyclictest22564-21/usr/sbin/munin12:05:180
11061995710,15cyclictest7102-21/usr/sbin/munin09:00:260
11061995710,15cyclictest13036-21users07:15:310
1106199569,13cyclictest26762-21ntp_states10:15:260
1106199568,16cyclictest5641-21/usr/sbin/munin11:00:160
1106199567,16cyclictest20303-21sshd09:50:210
11061995610,18cyclictest22491-21sendmail-msp10:00:010
11061995610,16cyclictest4324-21/usr/sbin/munin10:55:190
1106199558,17cyclictest24419-21/usr/sbin/munin10:05:290
1106199558,15cyclictest22768-21/usr/sbin/munin07:55:320
1106199558,15cyclictest20889-21sshd11:59:210
1106199558,14cyclictest18923-21/usr/sbin/munin07:40:290
1106199556,16cyclictest25328-21ntp_states12:15:250
11061995534,14cyclictest29350-21/usr/sbin/munin08:20:170
11061995532,15cyclictest4056-21runrttasks08:47:210
11061995510,16cyclictest27930-21/usr/sbin/munin08:15:110
11061995433,13cyclictest685-21/usr/sbin/munin08:35:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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