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2025-11-24 - 02:13
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 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 100 highest latencies:
System rack9slot2.osadl.org (updated Sun Nov 23, 2025 12:43:25)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
310602282252,17sleep00-21swapper/00
3135599278271,4cyclictest0-21swapper/00
309952258199,46sleep30-21swapper/33
310662248210,25sleep10-21swapper/11
3137499236230,4cyclictest14343-21apt-get3
309842232196,24sleep20-21swapper/22
3136099216208,5cyclictest13798-21apt-get1
3136599170165,3cyclictest0-21swapper/22
28272630,4sleep02823-21apt0
250992470,5sleep10-21swapper/11
250992470,5sleep10-21swapper/11
165482440,1sleep00-21swapper/00
286432420,2sleep30-21swapper/33
14042420,1sleep10-21swapper/11
153572390,1sleep00-21swapper/00
221192360,2sleep20-21swapper/22
3135599340,9cyclictest11308-21sed0
3135599340,9cyclictest11308-21sed0
18092340,1sleep20-21swapper/22
3136599330,31cyclictest7910-21kworker/2:12
3135599330,9cyclictest23949-21cat0
3135599330,10cyclictest6378-21sed0
3135599330,10cyclictest2491-21sed0
3135599310,9cyclictest25137-21latency_hist0
3135599310,16cyclictest11599-21grep0
3135599310,16cyclictest0-21swapper/00
3135599310,15cyclictest13633-21ntpq0
3135599290,9cyclictest9684-21latency_hist0
3135599290,10cyclictest2376-21hostname0
3135599280,9cyclictest29004-21cat0
3135599280,8cyclictest841-21latency_hist0
3135599270,10cyclictest30931-21tail0
257212270,2sleep30-21swapper/33
31374992622,2cyclictest341rcuc/33
3135599260,9cyclictest6856-21readlink0
3135599260,11cyclictest0-21swapper/00
3135599260,10cyclictest0-21swapper/00
3135599250,10cyclictest30074-21kernelversion0
3135599250,10cyclictest0-21swapper/00
3135599250,10cyclictest0-21swapper/00
3135599250,10cyclictest0-21swapper/00
220062250,2sleep23136599cyclictest2
31374992413,3cyclictest35-21ksoftirqd/33
3135599240,9cyclictest5467-21cstates0
3135599240,9cyclictest25879-21unixbench_multi0
3135599240,9cyclictest25879-21unixbench_multi0
3135599240,9cyclictest22688-21idleruntime-cro0
3135599240,9cyclictest15049-21wc0
3135599240,9cyclictest0-21swapper/00
98332230,1sleep10-21swapper/11
3136599232,15cyclictest28635-21apt-get2
3135599230,9cyclictest0-21swapper/00
3135599230,8cyclictest30267-21date0
23802230,3sleep12377-21grep1
31374992218,3cyclictest35-21ksoftirqd/33
31374992218,2cyclictest35-21ksoftirqd/33
3136599228,3cyclictest8824-21/usr/sbin/munin2
3136599227,13cyclictest12619-21date2
3136599223,18cyclictest28780-21awk2
3136599223,17cyclictest28517-21cat2
31365992216,3cyclictest22572-21aten2_r9power_e2
3136599221,18cyclictest6918-21perf2
31355992215,4cyclictest3565-21wc0
31355992215,4cyclictest10876-21munin-run0
31355992214,6cyclictest32198-21seq0
3135599220,9cyclictest20257-21plymouth0
31374992116,3cyclictest27396-21sendmail_mailst3
31374992116,3cyclictest24073-21threads3
31374992116,3cyclictest24073-21threads3
31374992115,4cyclictest25369-21df3
31374992114,5cyclictest28366-21apt3
31374992114,4cyclictest8135-21swap3
31374992113,5cyclictest35-21ksoftirqd/33
31374992110,9cyclictest2082-21systemd-journal3
3136599212,17cyclictest864-21latency_hist2
31365992116,3cyclictest3758-21uptime2
31365992116,3cyclictest12913-21munin-run2
3136599211,4cyclictest28116-21cron2
3136599211,18cyclictest505-21dbus-daemon2
3136599211,17cyclictest25088-21latency_hist2
3136599211,17cyclictest12565-1kworker/2:0H2
3136599210,19cyclictest25322-21kworker/2:02
31360992115,4cyclictest2904-21ls1
31360992115,3cyclictest22067-21sh1
31360992114,4cyclictest15221-21sh1
31360992114,4cyclictest1220-21cat1
31355992112,6cyclictest0-21swapper/00
3135599210,8cyclictest0-21swapper/00
3135599210,8cyclictest0-21swapper/00
3135599210,8cyclictest0-21swapper/00
3135599210,8cyclictest0-21swapper/00
3135599210,8cyclictest0-21swapper/00
114642210,3sleep3341rcuc/33
31374992015,3cyclictest29926-21open_files3
31374992015,3cyclictest22199-21open_files3
31374992015,3cyclictest20582-21aten2_r9power_p3
31374992014,4cyclictest16713-21wc3
31374992011,3cyclictest35-21ksoftirqd/33
3137499200,10cyclictest35-21ksoftirqd/33
3136599208,3cyclictest20635-21sendmail2
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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