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2025-11-27 - 21:40

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 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 Thu Nov 27, 2025 12:45:09)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12277224272191,97sleep00-21swapper07:09:140
124099915914,120cyclictest25005-21users08:21:030
124099915818,115cyclictest27901-21munin-run12:00:040
124099915813,121cyclictest20770-21sendmail_mailtr07:56:040
124099915733,20cyclictest512-21grep09:10:530
124099915716,115cyclictest28261-21apt-get08:45:380
124099915712,105cyclictest18849-21wc07:45:540
124099915711,123cyclictest19178-21apt-get07:50:340
124099915616,26cyclictest15966-21munin-run07:30:020
124099915615,114cyclictest2683-21df_inode09:25:280
124099915515,23cyclictest7770-21diskstats09:55:340
124099915514,100cyclictest26223-21apt11:50:100
124099915511,21cyclictest14333-21cron07:20:000
124099915415,116cyclictest7288-21find09:51:020
124099915414,116cyclictest11585-21apt10:20:010
124099915414,115cyclictest21542-21zcat08:00:520
124099915414,113cyclictest22962-21apt-get11:30:170
124099915322,104cyclictest22166-21apt-get11:25:190
124099915316,114cyclictest8594-21diskstats10:00:330
124099915315,38cyclictest3598-21uname09:30:440
124099915311,28cyclictest5780-21cat09:45:070
124099915216,111cyclictest4919-21munin-run09:40:020
124099915215,23cyclictest31571-21df_inode12:20:260
124099915215,114cyclictest5738-21apt-get09:45:340
124099915214,37cyclictest28027-21apt-get12:00:250
124099915212,117cyclictest18824-21sshd11:02:330
124099915212,114cyclictest20775-21memory11:15:480
124099915211,100cyclictest25923-21cat08:30:060
124099915136,22cyclictest17167-21unixbench_singl10:51:020
124099915119,109cyclictest13201-21munin-run07:15:020
124099915117,111cyclictest19055-21sshd11:05:350
124099915116,21cyclictest14583-21diskstats07:20:340
124099915112,116cyclictest31863-21snmpd11:10:440
124099915110,117cyclictest1311-21sort12:35:020
124099915018,26cyclictest32265-21apt-get12:25:150
124099915017,27cyclictest17321-21/usr/sbin/munin10:55:300
124099915016,23cyclictest31275-21grep09:00:440
124099915014,108cyclictest26182-21memory08:30:410
124099915013,112cyclictest23253-21sshd08:10:580
124099915011,40cyclictest11819-21diskstats10:20:340
124099915010,61cyclictest9548-21sort10:05:480
124099914921,27cyclictest17795-21diskstats07:40:360
124099914917,107cyclictest24229-21munin-run08:20:020
124099914915,114cyclictest28686-21kworker/u2:212:05:140
124099914915,108cyclictest15940-21wc10:45:440
124099914912,115cyclictest1242-21grep09:15:480
124099914911,25cyclictest1775-21/usr/sbin/munin09:20:550
124099914910,116cyclictest25201-21sed11:41:020
124099914815,24cyclictest1508-21diskstats12:35:300
124099914815,105cyclictest31809-21apt-get09:05:170
124099914814,22cyclictest25486-21diskstats11:45:340
124099914813,39cyclictest24461-21munin-run11:40:020
124099914812,113cyclictest14088-21cat10:35:060
124099914811,117cyclictest22537-21unixbench_singl08:06:010
124099914711,112cyclictest27560-21/usr/sbin/munin08:40:520
12409991469,115cyclictest29395-21apt-get08:50:220
124099914618,25cyclictest16963-21df_inode07:35:270
124099914618,106cyclictest16174-21diskstats07:30:330
124099914617,25cyclictest14940-21/usr/sbin/munin10:40:200
124099914614,23cyclictest10177-21/usr/sbin/munin10:10:250
124099914613,109cyclictest30462-21head12:11:040
124099914611,23cyclictest27424-21cron08:40:000
12409991459,112cyclictest30199-21wc08:55:200
124099914533,95cyclictest14810-21apt10:40:000
124099914532,17cyclictest0-21swapper11:25:060
124099914516,24cyclictest12979-21systemctl10:25:570
124099914513,26cyclictest30632-21/usr/sbin/munin12:15:370
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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