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2026-03-19 - 07:50
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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 rackaslot8.osadl.org (updated Thu Mar 19, 2026 00:44:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
159822324293,20sleep20-21swapper/219:05:092
176162267214,17sleep10-21swapper/119:05:561
159742264232,19sleep00-21swapper/019:05:030
176542259232,17sleep30-21swapper/319:06:263
70892590,0sleep30-21swapper/322:47:383
262332590,0sleep00-21swapper/000:37:420
193212560,0sleep30-21swapper/321:35:523
57242540,0sleep20-21swapper/223:25:532
229722210,0sleep30-21swapper/323:16:523
292552200,0sleep30-21swapper/323:20:203
320092190,0sleep20-21swapper/223:41:502
243032160,0sleep20-21swapper/200:36:112
39832120,0sleep10-21swapper/123:45:051
1804999120,2cyclictest9392-21smart_sda21:10:190
1804999112,3cyclictest9519-21cat21:30:150
1804999111,3cyclictest275-21systemd-journal20:38:590
1804999110,3cyclictest275-21systemd-journal00:00:000
1804999104,5cyclictest29877-21grep00:20:120
1804999101,3cyclictest13950-21cut00:30:140
1804999100,3cyclictest275-21systemd-journal22:40:010
1804999100,3cyclictest275-21systemd-journal20:20:010
1804999100,3cyclictest275-21systemd-journal19:45:120
1804999100,3cyclictest24596-21apt-get21:40:010
1804999100,3cyclictest1143-21ls22:05:000
1804999100,2cyclictest32155-21ssh00:01:230
1804999100,2cyclictest27724-21sed23:39:590
27906290,1sleep20-21swapper/200:19:142
180579990,8cyclictest19681-21fschecks_count23:15:122
180499993,1cyclictest7580-21sh21:48:580
180499993,1cyclictest12982-21ssh22:11:280
180499992,3cyclictest658-21snmpd19:38:260
180499992,2cyclictest5020-21/usr/sbin/munin19:50:130
180499992,2cyclictest30023-21grep23:40:190
180499992,2cyclictest27000-21cat22:20:160
180499992,2cyclictest18541-21chrt00:13:190
180499992,2cyclictest18170-21ssh21:35:170
180499992,1cyclictest28758-21uname19:30:170
180499992,1cyclictest25388-21sort21:20:160
180499992,1cyclictest2489-21sshd21:25:370
180499992,1cyclictest0-21swapper/022:26:270
180499991,3cyclictest11541-21ssh21:50:380
180499990,3cyclictest8587-21ssh23:47:280
180499990,3cyclictest7260-21ssh00:25:360
180499990,3cyclictest3595-21awk22:45:180
180499990,3cyclictest2904-21date23:25:010
180499990,3cyclictest27711-21sed23:00:140
180499990,3cyclictest275-21systemd-journal23:10:440
180499990,3cyclictest275-21systemd-journal22:55:410
180499990,3cyclictest20583-21smart_sda23:15:180
180499990,3cyclictest10053-21sh22:30:080
180499990,2cyclictest275-21systemd-journal21:58:360
180499990,2cyclictest275-21systemd-journal20:55:000
180499990,2cyclictest275-21systemd-journal20:50:000
180499990,2cyclictest1977-21idleruntime-cro22:45:000
180499990,1cyclictest275-21systemd-journal20:35:000
23539280,0sleep20-21swapper/222:38:002
180629987,1cyclictest34-21ksoftirqd/321:29:593
180579985,2cyclictest658-21snmpd21:43:382
180579984,3cyclictest275-21systemd-journal20:30:152
180499982,3cyclictest658-21snmpd19:55:070
180499982,2cyclictest504-21dbus-daemon20:55:150
180499982,2cyclictest24216-21rm00:16:210
180499982,1cyclictest739-21sed19:40:130
180499981,2cyclictest658-21snmpd20:40:140
180499981,1cyclictest0-21swapper/022:15:210
180499980,3cyclictest5561-21/usr/sbin/munin21:05:120
180499980,3cyclictest4882-21rm00:05:110
180499980,3cyclictest4094-21cat21:00:150
180499980,3cyclictest3351-21cut23:05:140
180499980,3cyclictest3351-21cut23:05:140
180499980,3cyclictest25587-21apt19:25:120
180499980,3cyclictest18180-21cstates20:20:120
180499980,3cyclictest16066-21sh21:15:030
180499980,3cyclictest1554-21chrt22:05:090
180499980,3cyclictest13542-21awk20:10:120
180499980,3cyclictest13541-21ssh23:30:330
180499980,3cyclictest11442-21expr20:05:120
180499980,3cyclictest10772-21expr22:50:110
180499980,2cyclictest3369-21cat23:25:120
180499980,2cyclictest24058-21cut19:20:150
180499980,2cyclictest21698-21grep20:25:200
180499980,2cyclictest20674-21cat19:15:020
180499980,2cyclictest13241-21ssh23:50:150
180499980,2cyclictest10082-21grep20:00:180
180629976,1cyclictest34-21ksoftirqd/323:40:003
180629975,2cyclictest34-21ksoftirqd/322:40:003
180629973,3cyclictest504-21dbus-daemon19:15:023
180629973,3cyclictest275-21systemd-journal22:05:343
180629973,3cyclictest275-21systemd-journal19:31:013
180629973,3cyclictest275-21systemd-journal00:30:343
180629972,4cyclictest658-21snmpd23:55:403
180629972,4cyclictest0-21swapper/319:52:373
180579973,3cyclictest658-21snmpd20:39:332
180579973,3cyclictest30019-21ntpq20:45:162
180579972,3cyclictest275-21systemd-journal20:30:012
180579972,3cyclictest12881-21perf00:30:012
180579971,3cyclictest9342-21idleruntime-cro22:10:012
180579971,3cyclictest28827-21munin-run20:45:012
180539973,3cyclictest275-21systemd-journal22:15:351
180539973,3cyclictest275-21systemd-journal00:31:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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