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2026-04-04 - 19:48
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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 100 highest latencies:
System rackdslot0.osadl.org (updated Sat Apr 04, 2026 12:45:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
369099236,11cyclictest0-21swapper/209:20:172
369099230,5cyclictest0-21swapper/212:25:182
368299230,5cyclictest0-21swapper/109:05:001
368299220,4cyclictest0-21swapper/108:15:431
3681992219,2cyclictest9805-21if_lxdbr011:05:170
368199220,8cyclictest0-21swapper/011:32:120
368199220,6cyclictest0-21swapper/008:45:440
368199220,18cyclictest0-21swapper/011:40:130
369099210,20cyclictest426-21systemd-udevd07:36:522
369099200,2cyclictest13172-21cat08:25:002
368299202,17cyclictest0-21swapper/111:59:111
3682992014,3cyclictest0-21swapper/109:11:251
368199200,2cyclictest26697-21nfsd411:35:160
369099190,3cyclictest0-21swapper/208:28:502
368299192,3cyclictest0-21swapper/108:40:331
368299192,3cyclictest0-21swapper/108:38:581
3681991917,1cyclictest0-21swapper/012:26:090
369099188,5cyclictest0-21swapper/207:50:202
3690991816,1cyclictest0-21swapper/210:30:122
3690991816,1cyclictest0-21swapper/210:30:122
3690991815,2cyclictest8737-21ntp_offset12:00:182
3690991814,3cyclictest7459-21cut11:00:172
368299182,1cyclictest0-21swapper/111:27:491
368299182,15cyclictest17622-21processes09:25:221
3682991816,1cyclictest0-21swapper/108:07:331
3682991815,2cyclictest16926-21nfsd412:15:181
3682991813,3cyclictest0-21swapper/107:57:411
368299181,2cyclictest11628-21fgrep12:05:211
368199182,2cyclictest31344-21cpuspeed_turbos11:45:130
368199182,15cyclictest4770-21fw_packets07:10:150
3681991815,2cyclictest9132-21awk08:15:190
3681991815,2cyclictest3915-21chrt09:01:590
3681991815,2cyclictest21848-21nfsd407:40:190
3681991814,3cyclictest24794-21cnf-update-db09:40:000
368199181,1cyclictest13424-21munin-run08:25:010
368199181,16cyclictest14315-21cat11:15:000
368199180,3cyclictest1079-21cups-browsed08:50:210
3690991715,1cyclictest15162-21expr07:30:142
3690991714,2cyclictest595-21cat10:50:142
3690991714,2cyclictest27273-21chrt10:40:112
3690991714,2cyclictest23342-21/usr/sbin/munin07:45:162
3690991714,2cyclictest18139-21python312:20:002
3690991714,2cyclictest12244-21/usr/sbin/munin07:25:112
3690991713,3cyclictest6256-21ls08:10:182
3690991713,3cyclictest5239-21grep07:10:172
369099171,15cyclictest3983-21H222:10:212
369099171,15cyclictest0-21swapper/212:35:202
369099170,2cyclictest8841-21kernelversion08:15:172
369099170,2cyclictest3742-21vmstat11:50:222
369099170,2cyclictest3600-21ntp_kernel_err08:05:192
369099170,2cyclictest20229-21ntp_kernel_err09:30:172
369099170,2cyclictest12495-21fschecks_time11:10:142
369099170,16cyclictest9847-21perf09:15:002
369099170,16cyclictest5153-21expr10:00:132
369099170,16cyclictest385-21nfsd408:00:192
369099170,16cyclictest3707-21master09:37:252
369099170,16cyclictest29964-21/usr/sbin/munin10:45:122
369099170,16cyclictest29460-21tune2fs07:55:152
369099170,16cyclictest27926-21/usr/sbin/munin08:50:122
369099170,16cyclictest25561-21nfsd410:35:182
369099170,16cyclictest25127-21cpuspeed_turbos09:40:142
369099170,16cyclictest25034-21dpkg08:45:012
369099170,16cyclictest22386-21timerandwakeup07:40:212
369099170,16cyclictest21537-21sed08:39:002
369099170,16cyclictest17047-21fschecks_count08:30:152
369099170,16cyclictest12566-21perf12:10:002
369099170,16cyclictest10270-21apache_accesses10:10:092
369099170,16cyclictest0-21swapper/209:00:142
369099170,15cyclictest0-21swapper/210:22:462
3682991716,1cyclictest21-21ksoftirqd/110:36:231
3682991715,1cyclictest21-21ksoftirqd/107:20:151
3682991715,1cyclictest158272sleep108:27:391
3682991714,2cyclictest8284-21chrt11:02:131
3682991714,2cyclictest6626-21smtpd09:05:591
3682991714,2cyclictest5004-21expr10:00:141
3682991714,2cyclictest32234-21missed_timers08:55:161
3682991714,2cyclictest25896-21expr11:35:121
3682991714,2cyclictest19679-21taskset07:35:231
3682991714,2cyclictest16813-21ls08:30:141
3682991714,2cyclictest14391-21cat11:15:001
3682991714,2cyclictest13056-21ls10:15:131
3682991714,2cyclictest0-21swapper/110:10:111
368299170,2cyclictest843-21systemd-network11:52:161
368299170,2cyclictest23413-21fschecks_time11:30:131
368299170,2cyclictest21850-21cat09:35:141
368299170,2cyclictest1594-21systemd10:40:511
368299170,1cyclictest0-21swapper/112:25:011
368299170,16cyclictest5279-21grep08:10:141
368299170,16cyclictest3351-21lxd10:06:411
368299170,16cyclictest3351-21lxd10:06:411
368299170,16cyclictest31348-21df09:50:151
368299170,16cyclictest28554-21cut08:50:161
368299170,16cyclictest25310-21cpuspeed_turbos08:45:131
368299170,16cyclictest23652-21expr07:45:141
368299170,16cyclictest23036-21ntp_kernel_pll_12:25:201
368299170,16cyclictest15444-21postgres09:21:301
368299170,16cyclictest15064-21anvil10:20:151
3681991715,1cyclictest0-21swapper/008:00:170
3681991714,2cyclictest9521-21chrt09:11:040
3681991714,2cyclictest818-21apt-config09:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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