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2026-09-06 - 01:56
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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 376 highest latencies:
System rackdslot0.osadl.org (updated Sat Sep 05, 2026 12:45:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
31574992816,6cyclictest20181-21latency_hist11:35:010
3157699241,17cyclictest0-21swapper/211:25:002
3157699240,23cyclictest4674-21wc08:15:122
3157699240,20cyclictest15645-21chrt10:26:332
3157699232,1cyclictest0-21swapper/208:46:262
3157699231,2cyclictest12771-21chrt08:29:562
3157699230,3cyclictest23089-21perf11:40:012
3157699230,3cyclictest21297-21sshd08:41:332
3157699230,2cyclictest9652-21perf08:25:012
3157699230,22cyclictest27807-21expr08:55:142
3157699230,1cyclictest0-21swapper/210:45:212
3157699223,17cyclictest8025-21smtpd12:10:002
31576992215,6cyclictest22192-21ntp_offset09:40:192
31576992214,7cyclictest1353-21basename09:05:162
31576992214,7cyclictest0-21swapper/209:01:502
3157699220,2cyclictest3707-21master11:58:502
3157699220,2cyclictest32534-21tune2fs07:10:162
3157699220,2cyclictest28184-21fgrep11:45:212
3157699220,21cyclictest9938-21cut09:20:142
3157699220,21cyclictest5202-21cut07:20:012
3157699220,21cyclictest0-21swapper/211:02:012
3157699220,21cyclictest0-21swapper/211:02:012
3157699220,21cyclictest0-21swapper/210:55:142
3157699220,21cyclictest0-21swapper/208:50:232
3157699220,21cyclictest0-21swapper/208:50:232
3157699220,21cyclictest0-21swapper/208:35:182
3157699220,1cyclictest0-21swapper/209:10:182
3157699220,16cyclictest9871-21ntp_states12:10:212
3157699220,16cyclictest11904-21sed07:30:192
3157599220,18cyclictest0-21swapper/109:11:161
31574992214,4cyclictest0-21swapper/009:33:490
31576992114,6cyclictest30109-21latency_hist08:05:012
31576992114,6cyclictest22081-21cpuspeed_turbos07:50:122
31576992114,6cyclictest14345-21http_loadtime08:30:172
31576992113,7cyclictest3987-21H222:10:212
31576992113,7cyclictest28625-21awk10:50:202
31576992113,7cyclictest19351-21expr10:35:152
31576992113,7cyclictest17874-21date09:35:012
3157699211,1cyclictest23738-21sh11:40:012
3157699210,20cyclictest23598-21ps12:35:202
3157699210,20cyclictest20770-21nfsd412:30:192
3157699210,20cyclictest20469-21grep07:45:192
3157699210,20cyclictest16011-21chrt12:21:352
3157699210,20cyclictest0-21swapper/211:16:092
3157699210,20cyclictest0-21swapper/211:10:192
3157699210,1cyclictest31593-21memory08:05:182
3157699210,1cyclictest0-21swapper/208:10:162
3157699210,1cyclictest0-21swapper/207:20:162
3157699210,15cyclictest0-21swapper/209:55:012
31576992014,5cyclictest45692sleep210:07:032
31576992014,5cyclictest3985-21H222:10:212
31576992014,5cyclictest0-21swapper/210:40:112
31576992014,5cyclictest0-21swapper/209:19:522
31576992014,5cyclictest0-21swapper/209:19:522
31576992013,6cyclictest17912-21cut12:25:172
31576992013,6cyclictest11231-21cpu12:15:142
31576992013,6cyclictest0-21swapper/210:20:192
31576992013,6cyclictest0-21swapper/209:45:162
3157699200,1cyclictest0-21swapper/211:50:132
3157699200,19cyclictest0-21swapper/211:25:202
3157699200,19cyclictest0-21swapper/209:55:162
3157699200,19cyclictest0-21swapper/207:38:062
3157699200,15cyclictest0-21swapper/210:15:012
3157699200,15cyclictest0-21swapper/207:55:232
3157699200,14cyclictest0-21swapper/210:00:152
3157599200,17cyclictest4219-21apt-config08:15:021
3157499202,13cyclictest11742-21munin-run09:25:010
3157499200,18cyclictest0-21swapper/007:57:140
31576991914,4cyclictest0-21swapper/212:00:152
3157699190,1cyclictest0-21swapper/209:25:212
3157699190,18cyclictest0-21swapper/211:05:182
3157699190,0cyclictest0-21swapper/210:30:172
31575991916,2cyclictest25146-21mailstats09:45:211
3157599190,18cyclictest1351-21lxd07:32:431
31574991917,1cyclictest4219-21ntp_kernel_err12:00:190
3157499190,18cyclictest0-21swapper/010:26:590
3157499190,18cyclictest0-21swapper/009:42:060
3157699180,0cyclictest0-21swapper/209:30:162
3157699180,0cyclictest0-21swapper/207:25:202
31575991814,3cyclictest1035-21thermald08:00:221
3157599181,16cyclictest4035-21H222:10:211
3157599181,16cyclictest3207-21JS22:10:211
3157599180,3cyclictest0-21swapper/112:35:311
3157599180,2cyclictest3983-21H222:10:211
3157599180,2cyclictest3979-21H222:10:211
3157499183,1cyclictest9-21ksoftirqd/011:49:540
3157499180,2cyclictest3989-21H222:10:210
3157499180,1cyclictest0-21swapper/009:01:380
3157699179,7cyclictest1100-21snmpd10:17:262
3157599172,14cyclictest0-21swapper/108:35:531
31575991714,2cyclictest3987-21H222:10:211
31575991714,2cyclictest3981-21H222:10:211
31575991714,2cyclictest15048-21missed_timers12:20:201
31575991714,2cyclictest11862-21latency10:20:171
31575991714,2cyclictest11836-21fschecks_count12:15:151
31575991714,1cyclictest0-21swapper/107:50:171
31575991713,3cyclictest17490-21turbostat09:35:001
31575991713,3cyclictest14495-21snapd11:40:151
3157599171,15cyclictest0-21swapper/110:43:171
3157599170,3cyclictest0-21swapper/107:40:011
3157599170,2cyclictest3987-21H222:10:211
3157599170,2cyclictest20241-21cut10:35:191
3157599170,2cyclictest18496-21df09:35:141
3157599170,2cyclictest1300-21lxd10:26:431
3157599170,16cyclictest993-21dbus-daemon09:20:011
3157599170,16cyclictest993-21dbus-daemon09:20:011
3157599170,16cyclictest4957-21postgres12:02:271
3157599170,16cyclictest4099-21H222:10:211
3157599170,16cyclictest3983-21H222:10:211
3157599170,16cyclictest3983-21H222:10:211
3157599170,16cyclictest32175-21expr10:00:151
3157599170,16cyclictest2260-21grep10:05:131
3157599170,16cyclictest15892-21snapd09:00:151
3157599170,16cyclictest1523-21lxd10:50:431
3157599170,16cyclictest14504-21snapd09:20:281
3157599170,16cyclictest1100-21snmpd11:10:181
3157599170,16cyclictest0-21swapper/111:18:581
3157599170,16cyclictest0-21swapper/107:40:151
3157599170,15cyclictest0-21swapper/112:35:001
3157499172,9cyclictest12903-21/usr/sbin/munin08:30:010
3157499172,1cyclictest6300-21smartctl12:05:160
3157499172,1cyclictest0-21swapper/009:12:430
3157499172,14cyclictest0-21swapper/010:01:040
31574991715,1cyclictest22006-21cpuspeed_turbos07:50:120
31574991715,1cyclictest0-21swapper/010:15:220
31574991715,1cyclictest0-21swapper/007:14:190
31574991714,2cyclictest9524-21tr07:25:210
31574991714,2cyclictest3983-21H222:10:210
31574991714,2cyclictest3979-21H222:10:210
31574991714,2cyclictest25064-21expr08:50:150
31574991714,2cyclictest25064-21expr08:50:150
31574991714,2cyclictest24144-21taskset10:43:290
31574991714,2cyclictest23680-21pzem_voltage12:35:210
31574991714,2cyclictest23282-21nfsd408:45:180
31574991714,2cyclictest2069-21systemd-udevd10:56:520
31574991714,2cyclictest2069-21systemd-udevd09:56:520
31574991714,2cyclictest19393-21/usr/sbin/munin12:30:230
31574991713,3cyclictest14983-21nvmesmart_nvme007:35:190
3157499171,15cyclictest4992-21grep11:05:190
3157499171,15cyclictest0-21swapper/011:35:210
3157499171,15cyclictest0-21swapper/008:56:170
3157499170,2cyclictest8894-21systemctl09:20:010
3157499170,2cyclictest8894-21systemctl09:20:010
3157499170,2cyclictest3987-21H222:10:210
3157499170,2cyclictest3983-21H222:10:210
3157499170,2cyclictest19637-21timerandwakeup09:35:210
3157499170,2cyclictest12998-21expr09:25:150
3157499170,1cyclictest0-21swapper/011:40:160
3157499170,16cyclictest870-21systemd-logind10:38:520
3157499170,16cyclictest4099-21H222:10:210
3157499170,16cyclictest31759-21awk08:05:190
3157499170,16cyclictest27559-21expr10:50:150
3157499170,16cyclictest2069-21systemd-udevd08:36:520
3157499170,16cyclictest13519-21pzem_current11:20:200
3157499170,16cyclictest12270-21ntp_states10:20:190
3157499170,16cyclictest0-21swapper/009:45:180
3157499170,16cyclictest0-21swapper/008:41:590
31575991614,1cyclictest9061-21df12:10:161
31575991614,1cyclictest26011-21awk08:50:191
31575991614,1cyclictest26011-21awk08:50:191
31575991614,1cyclictest14495-21snapd11:27:581
31575991614,1cyclictest12013-21apache_processe11:20:121
31575991614,1cyclictest0-21swapper/112:05:191
31575991614,1cyclictest0-21swapper/111:55:151
31575991614,1cyclictest0-21swapper/111:45:181
31575991614,1cyclictest0-21swapper/111:30:161
31575991614,1cyclictest0-21swapper/111:00:101
31575991614,1cyclictest0-21swapper/111:00:091
31575991614,1cyclictest0-21swapper/110:13:231
31575991614,1cyclictest0-21swapper/108:58:421
31575991614,1cyclictest0-21swapper/108:30:161
31575991614,1cyclictest0-21swapper/108:20:191
3157599161,1cyclictest29165-21cpuspeed_turbos09:55:161
3157599161,14cyclictest0-21swapper/110:45:071
3157599160,2cyclictest10768-21cat08:25:161
3157599160,1cyclictest6303-21threads08:15:191
3157599160,1cyclictest0-21swapper/111:36:311
3157599160,1cyclictest0-21swapper/107:55:141
3157599160,16cyclictest0-21swapper/109:54:121
3157599160,15cyclictest8193-21grep10:15:141
3157599160,15cyclictest31125-21latency10:55:171
3157599160,15cyclictest19242-21/usr/sbin/munin08:40:131
3157599160,15cyclictest16563-21cpuspeed_turbos10:30:171
3157599160,15cyclictest0-21swapper/112:25:111
3157599160,15cyclictest0-21swapper/109:25:061
31574991614,1cyclictest28038-21timerandwakeup09:50:260
31574991614,1cyclictest0-21swapper/012:21:350
31574991614,1cyclictest0-21swapper/011:55:130
31574991614,1cyclictest0-21swapper/011:25:150
31574991614,1cyclictest0-21swapper/009:05:180
31574991614,1cyclictest0-21swapper/008:10:160
31574991614,1cyclictest0-21swapper/007:30:150
31574991613,2cyclictest4556-21users07:15:210
31574991613,2cyclictest28653-21if_err_enp1s008:00:170
3157499160,1cyclictest3985-21H222:10:210
3157499160,15cyclictest8840-21cat12:10:160
3157499160,15cyclictest8817-21cron11:15:000
3157499160,15cyclictest7832-21expr08:20:150
3157499160,15cyclictest3991-21H222:10:210
3157499160,15cyclictest24770-21grep10:45:140
3157499160,15cyclictest16690-21expr10:30:170
3157499160,15cyclictest14989-21ntp_kernel_err08:30:200
3157499160,15cyclictest0-21swapper/011:13:130
3157499160,15cyclictest0-21swapper/011:00:120
3157499160,15cyclictest0-21swapper/011:00:120
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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