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2025-03-25 - 03:25

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 highest latencies:
System rack5slot7s.osadl.org (updated Tue Mar 25, 2025 00:45:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
6174224322202,87sleep00-21swapper19:08:250
63989916011,124cyclictest31391-21/usr/sbin/munin21:55:490
63989915943,96cyclictest11523-21sshd19:39:490
63989915915,121cyclictest21096-21memory20:40:490
63989915914,121cyclictest15523-21df_inode00:00:290
63989915816,117cyclictest23276-21munin-run21:00:010
63989915711,22cyclictest7559-21/usr/sbin/munin23:00:490
63989915615,117cyclictest8333-21apt19:20:010
63989915610,122cyclictest14842-21ls19:56:020
63989915418,115cyclictest9177-21apt-get23:16:260
63989915417,23cyclictest7169-21apt-get22:56:570
63989915412,26cyclictest8751-21sort23:10:430
6398991539,119cyclictest3628-21apt-get22:36:350
63989915317,23cyclictest7186-21apt19:15:010
63989915315,113cyclictest30303-21/usr/sbin/munin21:50:080
63989915311,118cyclictest19131-21latency_hist20:30:010
63989915212,99cyclictest17850-21munin-run00:20:010
63989915210,119cyclictest9151-21munin-plugin-st19:25:020
6398991519,23cyclictest14489-21modprobe23:55:010
63989915134,21cyclictest682-21ntpq22:10:440
63989915133,97cyclictest11936-21sshd23:32:480
63989915118,26cyclictest11665-21apt-get19:40:240
63989915117,108cyclictest1176-21apt-get22:15:200
63989915116,23cyclictest20687-21users20:36:030
63989915116,111cyclictest28425-21df21:35:260
63989915034,96cyclictest32668-21latency_hist22:05:040
63989915021,28cyclictest2011-21apt-get22:20:210
63989915019,107cyclictest12540-21apt-get19:45:280
63989915017,38cyclictest20390-21munin-run00:40:030
63989915016,111cyclictest3630-21munin-run22:35:010
63989915015,112cyclictest15102-21apt-get20:00:220
63989915014,24cyclictest112-21systemd-journal19:50:490
63989915012,25cyclictest27526-21apt21:30:080
63989915012,115cyclictest11159-21munin-run23:30:010
63989915012,114cyclictest13572-21apt23:45:000
63989915011,49cyclictest17425-21wc20:15:040
63989915010,115cyclictest12132-21cstates23:35:230
6398991498,118cyclictest29430-21grep21:40:470
63989914923,25cyclictest18282-21ntp_states00:20:480
63989914914,22cyclictest6342-21head22:50:570
63989914911,111cyclictest25450-21awk21:11:010
63989914833,94cyclictest19020-21latency_hist20:25:030
63989914820,101cyclictest23507-21diskstats21:00:340
63989914817,46cyclictest10581-21memory23:20:530
63989914816,25cyclictest14707-21diskstats23:55:350
63989914813,112cyclictest25774-21/usr/sbin/munin21:16:000
6398991479,114cyclictest21702-21cat20:50:040
63989914722,25cyclictest19346-21diskstats20:30:310
63989914717,19cyclictest0-21swapper21:20:480
63989914715,104cyclictest24191-21apt-get21:05:140
63989914713,105cyclictest21773-21/usr/sbin/munin20:50:520
63989914711,26cyclictest2843-21latency_hist22:30:030
63989914711,24cyclictest18096-21unixbench_singl20:16:030
63989914710,100cyclictest16950-21grep00:10:580
63989914627,20cyclictest0-21swapper00:30:410
63989914617,23cyclictest16135-21memory20:05:440
63989914616,106cyclictest10220-21irqstats19:30:380
63989914614,22cyclictest5559-21grep22:45:050
63989914417,102cyclictest16238-21munin-run00:10:010
63989914412,98cyclictest30146-1kworker/u3:621:46:030
63989914314,18cyclictest9252-21apt-get19:25:130
63989914218,23cyclictest268-21snmpd23:48:420
63989914117,25cyclictest8379-21apt23:10:010
63989914116,24cyclictest27428-21munin-run21:30:030
63989914016,23cyclictest268-21snmpd00:28:590
63989914015,24cyclictest268-21snmpd22:08:040
63989914011,28cyclictest5584-21sshd22:49:150
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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