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2025-06-19 - 17:37

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 Thu Jun 19, 2025 12:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
672622500,2sleep06728-21sort11:25:220
434522140,3sleep04348-21tr09:10:230
1947321400,3chrt19467-21/usr/sbin/munin10:10:000
803421360,4chrt8037-21tr07:20:010
1306521340,4chrt13068-21latency_hist09:45:010
2090621330,4chrt20904-21irqstats12:20:190
395921310,3chrt3957-21df_inode11:15:150
1692321310,4chrt16925-21sort10:00:020
2870221160,3sleep028703-21/usr/sbin/munin10:45:180
1360221150,4sleep013604-21grep09:45:300
1999921080,3sleep020064-21/usr/sbin/munin10:10:280
301521040,4sleep03077-21grep11:10:280
2997421010,3sleep029987-21/usr/sbin/munin10:50:160
248132990,3sleep024830-21awk10:30:150
169312880,3sleep016937-21/usr/sbin/munin12:05:140
96612870,2sleep09660-21sendmail_mailqu09:30:270
95942784,7sleep09596-21irqstats07:25:200
435827722,32sleep04401-21irqstats07:05:160
314982770,3sleep031499-21if_eth008:50:170
276802775,61sleep027689-21memory08:35:190
236572745,58sleep023707-21df08:20:140
249992670,2sleep025000-21/usr/sbin/munin08:25:150
546699638,23cyclictest23325-21/usr/sbin/munin12:30:120
5466996131,21cyclictest18552-21/usr/sbin/munin08:00:150
546699609,18cyclictest1697-21memory09:00:190
546699608,18cyclictest32654-21/usr/sbin/munin08:55:240
546699597,17cyclictest5213-21/usr/sbin/munin11:20:140
5466995934,15cyclictest23764-21/usr/sbin/munin10:25:360
5466995921,26cyclictest16167-21ntpq07:50:230
5466995919,14cyclictest6560-21awk09:20:010
546699589,19cyclictest9943-21sshd11:37:430
546699589,15cyclictest27028-21sshd10:38:430
546699589,15cyclictest26273-21df08:30:150
546699589,14cyclictest21297-21/usr/sbin/munin08:10:200
546699589,14cyclictest11990-21/usr/sbin/munin11:45:260
546699588,16cyclictest14416-21/usr/sbin/munin09:50:260
546699588,16cyclictest13318-21/usr/sbin/munin07:40:320
5466995833,15cyclictest14186-21latency_hist11:55:010
5466995817,13cyclictest269-21runrttasks07:10:210
5466995810,20cyclictest11712-21munin-run09:40:010
546699579,17cyclictest18879-21sshd12:11:290
546699579,16cyclictest6744-21/usr/sbin/munin09:20:130
546699578,21cyclictest16025-21awk12:00:260
546699578,17cyclictest2797-21/usr/sbin/munin09:05:170
5466995734,15cyclictest22540-21/usr/sbin/munin08:15:200
293162570,2sleep029319-21sort08:40:290
546699569,16cyclictest8120-21irqstats09:25:170
546699569,16cyclictest20018-21/usr/sbin/munin08:05:210
546699568,12cyclictest24601-21/usr/sbin/munin12:35:190
546699567,16cyclictest10381-21/usr/sbin/munin11:40:260
5466995626,21cyclictest22588-21timerandwakeup12:25:280
5466995610,17cyclictest32364-21munin-run11:00:020
5466995610,14cyclictest14600-21/usr/sbin/munin07:45:250
546699559,17cyclictest7789-21/usr/sbin/munin11:30:200
546699559,15cyclictest30090-21/usr/sbin/munin08:45:290
546699559,15cyclictest23347-21munin-run10:25:000
546699556,15cyclictest10735-21/usr/sbin/munin07:30:240
5466995531,15cyclictest1179-21runrttasks11:04:510
5466995523,22cyclictest18205-21cat10:05:020
5466995510,14cyclictest17296-21if_eth007:55:160
546699548,15cyclictest20920-21df10:15:130
546699548,14cyclictest8297-21/usr/sbin/munin07:20:190
546699547,19cyclictest27801-21/usr/sbin/munin10:40:340
546699547,14cyclictest14903-21sshd11:55:430
546699538,17cyclictest19444-21wc12:15:110
546699538,16cyclictest12272-21ntp_kernel_pll_07:35:230
546699536,16cyclictest1747-21which11:05:290
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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