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2026-03-20 - 13:35
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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
Characteristics of the highest latencies:
System rackdslot0.osadl.org (updated Fri Mar 20, 2026 00:46:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26658992514,6cyclictest0-21swapper/022:39:010
26658992112,5cyclictest0-21swapper/023:00:170
26660992016,3cyclictest0-21swapper/221:30:142
2665899203,11cyclictest31783-21python322:10:000
26658992015,2cyclictest13243-21cut19:40:160
26658992012,4cyclictest0-21swapper/021:13:240
2665999190,3cyclictest16766-21snapd20:17:491
2665899191,17cyclictest27845-21nfsd422:00:170
2665899190,4cyclictest0-21swapper/021:25:130
2665899190,18cyclictest0-21swapper/023:15:370
26660991815,2cyclictest2069-21systemd-udevd21:16:512
26660991814,3cyclictest31783-21python322:10:012
26660991814,3cyclictest25799-21ldconfig.real22:00:012
26660991814,3cyclictest1856-21systemd-udevd21:06:522
2666099181,2cyclictest19518-21proc_pri00:35:202
2666099180,1cyclictest0-21swapper/219:34:502
2666099180,17cyclictest16793-21snapd23:30:182
2666099180,16cyclictest3053-21systemd-logind00:34:512
2666099180,16cyclictest0-21swapper/219:49:072
2665999182,15cyclictest15995-21nfsd419:45:181
26659991816,1cyclictest8494-21ntp_kernel_pll_00:15:171
26659991815,2cyclictest2061-21proc_pri21:15:181
2665999180,17cyclictest5601-21lxd20:36:501
2665999180,16cyclictest0-21swapper/123:46:381
26658991816,1cyclictest11182-21gpgv22:30:010
2665899181,2cyclictest19698-21tr22:40:200
2665899181,16cyclictest16216-21taskset23:33:190
2665899181,16cyclictest15995-21nfsd419:45:180
2665899180,15cyclictest0-21swapper/022:48:060
2665899180,15cyclictest0-21swapper/022:48:050
26660991716,1cyclictest20851-21apache_volume22:45:112
26660991716,1cyclictest20851-21apache_volume22:45:112
26660991715,1cyclictest0-21swapper/219:15:172
26660991715,1cyclictest0-21swapper/219:15:172
26660991714,2cyclictest7392-21ntp_kernel_err22:20:192
26660991714,2cyclictest7392-21ntp_kernel_err22:20:182
26660991714,2cyclictest6287-21date19:30:022
26660991714,2cyclictest5841-21/usr/sbin/munin23:15:122
26660991714,2cyclictest26482-21/usr/sbin/munin22:00:162
26660991714,2cyclictest25121-21df_inode21:00:122
26660991714,2cyclictest24933-21ntp_kernel_err22:50:172
26660991714,2cyclictest19925-21proxymap21:46:192
26660991714,2cyclictest1856-21systemd-udevd21:36:512
26660991714,2cyclictest1856-21systemd-udevd20:58:512
26660991714,2cyclictest16744-21snapd23:27:482
26660991714,2cyclictest10017-21nfsd422:25:192
2666099171,2cyclictest1856-21systemd-udevd19:22:522
26660991712,3cyclictest0-21swapper/221:40:162
2666099171,15cyclictest0-21swapper/220:27:572
2666099170,3cyclictest0-21swapper/223:10:182
2666099170,2cyclictest32732-21latency23:05:152
2666099170,2cyclictest31363-21http_loadtime00:00:162
2666099170,2cyclictest3053-21systemd-logind22:34:522
2666099170,2cyclictest28251-21expr23:55:142
2666099170,2cyclictest1856-21systemd-udevd19:38:522
2666099170,2cyclictest18098-21/usr/sbin/munin22:40:152
2666099170,2cyclictest1515-21lxd21:50:492
2666099170,2cyclictest11098-21nfsd400:20:182
2666099170,16cyclictest8498-21ls21:25:232
2666099170,16cyclictest8281-21hddtemp_smartct20:30:172
2666099170,16cyclictest4373-21/usr/sbin/munin00:10:182
2666099170,16cyclictest26565-21/usr/sbin/munin20:05:142
2666099170,16cyclictest22999-21apache_accesses20:00:132
2666099170,16cyclictest22007-21cat19:55:212
2666099170,16cyclictest20222-21wc20:50:212
2666099170,16cyclictest20162-21munin-run19:55:012
2666099170,16cyclictest18174-21awk23:35:172
2666099170,16cyclictest12621-21cron20:39:002
2666099170,16cyclictest0-21swapper/220:15:162
26659991714,2cyclictest31965-21grep00:00:181
26659991714,2cyclictest19862-21perf19:55:001
26659991714,2cyclictest1525-21lxd21:50:501
26659991714,2cyclictest12232-21/usr/sbin/munin21:35:151
26659991714,2cyclictest11756-21munin-plugin-st19:40:001
2665999171,1cyclictest0-21swapper/122:35:181
2665999171,1cyclictest0-21swapper/121:40:131
2665999171,15cyclictest27857-21chrt20:07:451
2665999171,15cyclictest23331-21/usr/sbin/munin21:55:141
2665999170,3cyclictest880-21rs:main1
2665999170,3cyclictest0-21swapper/120:30:231
2665999170,2cyclictest8247-21cat19:30:201
2665999170,2cyclictest32694-21kernelversion23:05:151
2665999170,2cyclictest31370-21nfsd421:10:191
2665999170,2cyclictest3053-21systemd-logind22:06:521
2665999170,2cyclictest27842-21awk22:00:181
2665999170,2cyclictest25997-21ps21:00:171
2665999170,2cyclictest18306-21cat00:35:121
2665999170,2cyclictest13296-21/usr/sbin/munin20:40:131
2665999170,16cyclictest426-21systemd-udevd21:26:521
2665999170,16cyclictest4098-21ntp_kernel_pll_23:10:171
2665999170,16cyclictest19047-21expr20:50:141
2665999170,16cyclictest17012-21cat00:30:211
2665999170,16cyclictest16999-21tr23:35:131
26658991715,1cyclictest122722sleep020:35:480
26658991715,1cyclictest0-21swapper/020:15:180
26658991715,1cyclictest0-21swapper/000:20:140
26658991714,2cyclictest9706-21grep21:30:150
26658991714,2cyclictest9629-21munin-run00:20:010
26658991714,2cyclictest32359-21chrt19:18:350
26658991714,2cyclictest32359-21chrt19:18:350
26658991714,2cyclictest25734-21python322:00:010
26658991714,2cyclictest2390-21find23:10:100
26658991714,2cyclictest22184-21/usr/sbin/munin19:55:200
26658991714,2cyclictest17181-21timerwakeupswit00:30:220
26658991714,2cyclictest1085-21gdbus22:20:210
26658991714,2cyclictest1085-21gdbus22:20:200
26658991713,3cyclictest0-21swapper/020:50:130
2665899170,2cyclictest9335-21http_loadtime23:20:150
2665899170,2cyclictest574-21cut00:04:590
2665899170,2cyclictest5604-21timerwakeupswit21:20:230
2665899170,2cyclictest26791-21cat22:55:140
2665899170,2cyclictest23684-21cron21:00:040
2665899170,2cyclictest20496-21latency_hist21:50:000
2665899170,2cyclictest19681-21sshd19:53:080
2665899170,2cyclictest1961-21nfsd419:20:160
2665899170,2cyclictest17347-21nvmesmart_nvme020:45:180
2665899170,2cyclictest14413-21nfsd420:40:200
2665899170,2cyclictest14267-21proxymap21:36:180
2665899170,2cyclictest13195-21awk00:25:150
2665899170,16cyclictest993-21dbus-daemon23:50:200
2665899170,16cyclictest5865-21processes00:10:190
2665899170,16cyclictest4068-21expr19:25:140
2665899170,16cyclictest3983-21H222:10:210
2665899170,16cyclictest3667-21expr22:15:120
2665899170,16cyclictest30011-21date19:15:000
2665899170,16cyclictest29850-21munin-run21:10:000
2665899170,16cyclictest2518-21chrt22:14:550
2665899170,16cyclictest23572-21chrt22:50:110
2665899170,16cyclictest22447-21grep20:55:190
2665899170,16cyclictest22052-21latency_hist23:45:010
2665899170,16cyclictest19320-21basename23:40:010
2665899170,16cyclictest16745-21snapd23:05:480
26660991614,1cyclictest4535-21if_err_enp1s021:20:172
26660991614,1cyclictest13202-21missed_timers19:40:172
26660991614,1cyclictest0-21swapper/223:45:142
26660991614,1cyclictest0-21swapper/223:40:132
26660991614,1cyclictest0-21swapper/223:20:122
26660991614,1cyclictest0-21swapper/222:35:132
26660991614,1cyclictest0-21swapper/222:15:122
26660991614,1cyclictest0-21swapper/221:10:132
26660991614,1cyclictest0-21swapper/220:40:112
26660991614,1cyclictest0-21swapper/219:10:022
26660991613,2cyclictest13293-21perl00:25:142
2666099160,1cyclictest28601-21/usr/sbin/munin20:10:122
2666099160,1cyclictest0-21swapper/223:00:142
2666099160,1cyclictest0-21swapper/222:55:142
2666099160,1cyclictest0-21swapper/200:15:142
2666099160,1cyclictest0-21swapper/200:05:172
2666099160,15cyclictest2041-21expr20:20:122
2666099160,15cyclictest0-21swapper/223:50:122
2666099160,15cyclictest0-21swapper/222:10:142
2666099160,15cyclictest0-21swapper/220:46:022
26659991614,1cyclictest0-21swapper/123:55:011
26659991614,1cyclictest0-21swapper/123:30:131
26659991614,1cyclictest0-21swapper/123:00:091
26659991614,1cyclictest0-21swapper/122:55:151
26659991614,1cyclictest0-21swapper/122:50:211
26659991614,1cyclictest0-21swapper/122:45:151
26659991614,1cyclictest0-21swapper/122:45:141
26659991614,1cyclictest0-21swapper/122:28:461
26659991614,1cyclictest0-21swapper/121:30:121
26659991614,1cyclictest0-21swapper/121:20:131
26659991614,1cyclictest0-21swapper/120:55:121
26659991614,1cyclictest0-21swapper/120:20:151
26659991614,1cyclictest0-21swapper/120:10:171
26659991614,1cyclictest0-21swapper/119:20:181
26659991614,1cyclictest0-21swapper/119:15:131
26659991614,1cyclictest0-21swapper/119:15:121
26659991614,1cyclictest0-21swapper/119:10:011
26659991614,1cyclictest0-21swapper/100:05:131
26659991613,2cyclictest16595-21tune2fs20:45:141
2665999160,2cyclictest27697-21expr21:05:141
2665999160,1cyclictest0-21swapper/123:20:121
2665999160,1cyclictest0-21swapper/119:25:221
2665999160,15cyclictest6760-21http_loadtime22:20:161
2665999160,15cyclictest6760-21http_loadtime22:20:161
2665999160,15cyclictest27867-21/usr/sbin/munin23:55:121
2665999160,15cyclictest23214-21expr20:00:151
2665999160,15cyclictest20360-21fschecks_time23:40:131
2665999160,15cyclictest20007-21timerwakeupswit22:40:211
2665999160,15cyclictest199172chrt21:46:131
2665999160,15cyclictest0-21swapper/123:15:011
2665999160,15cyclictest0-21swapper/122:30:091
2665999160,15cyclictest0-21swapper/122:15:571
2665999160,15cyclictest0-21swapper/122:10:161
2665999160,15cyclictest0-21swapper/100:25:171
2665999160,15cyclictest0-21swapper/100:20:131
2665999160,15cyclictest0-21swapper/100:10:101
26658991614,1cyclictest2121-21expr20:20:130
26658991614,1cyclictest0-21swapper/021:50:140
26658991614,1cyclictest0-21swapper/021:15:140
26658991613,2cyclictest28466-21df23:55:150
26658991613,2cyclictest12697-21ntpq23:25:160
26658991613,2cyclictest11887-21apt-get22:30:110
26658991611,4cyclictest19232-21cut00:35:160
2665899160,2cyclictest28596-21seq20:10:080
2665899160,1cyclictest0-21swapper/020:09:310
2665899160,1cyclictest0-21swapper/019:35:130
2665899160,1cyclictest0-21swapper/000:05:110
2665899160,15cyclictest224452chrt23:45:120
2665899160,15cyclictest16534-21/usr/sbin/munin21:40:170
2665899160,15cyclictest0-21swapper/020:30:180
2665899160,15cyclictest0-21swapper/020:25:170
2665899160,15cyclictest0-21swapper/020:00:150
2665999150,1cyclictest0-21swapper/120:25:171
2665999150,1cyclictest0-21swapper/119:57:041
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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