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2026-06-20 - 04:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #7

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: 50.5 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 792 highest latencies:
System rack5slot7s.osadl.org (updated Sat Jun 20, 2026 00:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4143224412202,96sleep00-21swapper19:09:150
42749916514,108cyclictest8739-21snmpd00:16:320
42749916319,115cyclictest23870-21apt-get21:10:230
42749916218,118cyclictest11438-21apt-get19:56:270
42749915930,22cyclictest0-21swapper21:15:120
42749915914,122cyclictest6173-21munin-run22:40:020
42749915914,120cyclictest18925-21irqstats23:56:090
42749915840,98cyclictest6644-21latency_hist19:25:040
42749915818,114cyclictest7031-21apt-get22:42:020
42749915816,40cyclictest28764-21munin-run21:40:020
42749915811,123cyclictest28987-21df_inode21:40:270
42749915718,24cyclictest13498-21diskstats20:05:370
42749915621,104cyclictest10530-21apt-get23:05:190
42749915616,115cyclictest2043-21apt-get22:15:240
42749915540,93cyclictest13404-21mailstats23:20:560
42749915517,22cyclictest21895-21/usr/sbin/munin00:15:040
42749915516,23cyclictest22109-21munin-run21:00:030
42749915516,115cyclictest1222-21apt-get22:10:210
42749915515,24cyclictest7491-21irqstats22:45:440
42749915514,101cyclictest26140-21latency_hist00:40:010
42749915513,117cyclictest20780-21irqstats20:50:380
42749915512,120cyclictest20366-21cat00:05:040
4274991549,119cyclictest15506-21if_eth023:35:360
42749915416,25cyclictest5083-21munin-node19:15:070
42749915415,22cyclictest27167-21munin-run21:30:020
42749915415,118cyclictest12022-21munin-run23:15:010
4274991539,119cyclictest8905-21sed19:36:020
42749915318,109cyclictest14554-21apt-get23:30:120
42749915317,26cyclictest29775-21df21:45:240
42749915316,50cyclictest9950-21apt-get19:45:200
42749915217,21cyclictest8282-21irqstats22:50:360
42749915216,113cyclictest31169-21munin-run21:55:010
42749915214,115cyclictest24913-21sort00:30:450
42749915213,39cyclictest20814-21awk00:05:560
42749915213,115cyclictest15729-21latency_hist20:20:050
42749915136,22cyclictest12883-21ntp_kernel_pll_20:00:550
42749915135,22cyclictest19212-21kernelversion20:40:410
42749915119,104cyclictest13755-21apt-get23:25:190
42749915116,28cyclictest25968-21ntp_kernel_pll_21:20:470
42749915115,108cyclictest15920-21diskstats20:20:350
42749915112,100cyclictest18817-21grep20:36:020
42749915111,112cyclictest32087-21/usr/sbin/munin22:00:210
42749915036,93cyclictest23628-21/usr/sbin/munin21:06:030
42749915029,96cyclictest24213-21grep00:25:530
42749915018,28cyclictest3973-21df22:25:250
42749915015,41cyclictest5549-21munin-run19:20:040
42749915014,21cyclictest3082-21apt-get22:20:190
42749915011,112cyclictest31266-21/usr/sbin/munin21:55:360
42749914929,101cyclictest12370-21missed_timers23:15:450
42749914917,25cyclictest7351-21users19:26:130
42749914917,25cyclictest18454-21munin-run23:55:030
42749914915,23cyclictest8909-21apt-get22:55:190
42749914914,26cyclictest9933-21latency_hist19:45:050
42749914912,27cyclictest27963-21/usr/sbin/munin21:35:020
42749914818,25cyclictest16172-21apt-get23:40:200
42749914814,21cyclictest17821-21grep20:30:560
42749914811,114cyclictest11404-21sendmail-mta19:51:050
42749914716,23cyclictest8144-21users19:31:070
42749914716,107cyclictest17063-21df23:45:230
42749914714,24cyclictest19990-21irqstats20:45:400
42749914714,108cyclictest4844-21irqstats22:30:360
42749914674,50cyclictest425-21munin-node22:05:120
42749914616,108cyclictest0-21swapper21:05:050
42749914616,107cyclictest16846-21memory20:25:450
42749914615,18cyclictest23058-21apt-get00:20:180
42749914511,25cyclictest14179-21/usr/sbin/munin20:10:460
4274991448,50cyclictest9892-21if_eth023:00:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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