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2025-04-21 - 06:47

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 Mon Apr 21, 2025 00:45:08)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19690224352196,96sleep00-21swapper19:07:390
199969916012,43cyclictest28482-21/usr/sbin/munin20:01:270
199969915714,119cyclictest25031-21munin-run23:20:030
199969915713,27cyclictest16285-21sort22:11:050
199969915614,117cyclictest25254-21apt-get19:40:260
199969915526,110cyclictest32764-21sed00:16:040
199969915520,106cyclictest26952-21diskstats19:50:360
199969915514,100cyclictest20091-21/usr/sbin/munin19:10:130
199969915510,121cyclictest25836-21modprobe23:25:000
199969915440,94cyclictest14026-21ntp_kernel_pll_21:55:520
199969915419,111cyclictest30313-21apt00:00:000
199969915418,112cyclictest4102-21apt-get20:51:310
199969915314,99cyclictest26393-21df23:30:260
199969915314,114cyclictest7694-21apt-get21:10:260
199969915312,118cyclictest1007-21/usr/sbin/munin20:30:490
19996991529,118cyclictest7565-21apt-key21:10:060
199969915233,22cyclictest5907-21modprobe21:00:020
199969915218,24cyclictest2552-21ntp_states00:35:500
199969915216,113cyclictest12115-21df21:40:260
199969915215,96cyclictest2501-21munin-run20:40:010
199969915214,39cyclictest11289-21cstates21:35:270
199969915214,24cyclictest17421-21munin-run22:20:010
19996991519,116cyclictest28735-21grep23:50:030
199969915128,102cyclictest0-21swapper22:55:500
199969915117,36cyclictest31466-21diskstats00:10:280
199969915117,31cyclictest21113-21df_inode19:15:230
199969915116,23cyclictest31128-21apt00:05:010
199969915115,111cyclictest31982-21df20:20:270
199969915114,113cyclictest9362-21munin-run21:20:030
199969915112,97cyclictest112-21systemd-journal00:10:010
199969915112,27cyclictest17906-21wc22:21:010
199969915112,116cyclictest3409-21/usr/sbin/munin20:45:540
199969915112,101cyclictest23932-21grep19:30:540
19996991509,118cyclictest18893-21awk22:30:520
199969915019,23cyclictest30955-21apt20:15:010
199969915014,24cyclictest24219-21munin-run23:15:000
199969915012,24cyclictest22742-21apt19:25:020
199969915012,114cyclictest9581-21df21:20:270
199969915011,46cyclictest24724-21ntpq19:35:530
199969914915,110cyclictest31766-21munin-run20:20:010
199969914912,116cyclictest1210-21modprobe00:25:000
199969914912,114cyclictest22712-21df23:00:300
199969914910,114cyclictest21216-21grep22:50:380
199969914816,25cyclictest26158-21diskstats19:45:320
199969914815,25cyclictest22958-21diskstats19:25:360
199969914814,24cyclictest27766-21cron23:40:000
199969914812,42cyclictest15584-21modprobe22:10:000
199969914811,115cyclictest19952-21munin-run22:40:020
199969914811,113cyclictest1739-21ntpq00:30:450
199969914811,100cyclictest10507-21diskstats21:30:260
199969914734,20cyclictest20890-21munin-plugin-st22:50:010
199969914734,17cyclictest0-21swapper23:30:040
199969914713,110cyclictest14607-21/usr/sbin/munin22:00:210
199969914712,23cyclictest28244-21unixbench_singl19:56:040
199969914710,29cyclictest12928-21/usr/sbin/munin21:50:480
19996991469,24cyclictest12830-21munin-plugin-st21:50:020
199969914634,18cyclictest0-21swapper20:45:050
199969914621,27cyclictest32678-21apt-get20:25:200
199969914519,101cyclictest20315-21memory22:40:460
199969914516,28cyclictest28080-21irqstats23:40:390
199969914515,25cyclictest1340-21munin-run00:30:020
199969914512,26cyclictest6639-21ls21:01:010
199969914414,107cyclictest29067-21memory23:50:460
199969914410,110cyclictest23427-21munin-plugin-st23:10:010
199969914325,19cyclictest0-21swapper20:05:300
199969914013,26cyclictest10278-21sshd21:28:260
199969914012,90cyclictest18340-21sshd22:29:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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