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2025-12-09 - 17:18
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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 50 highest latencies:
System rackeslot6.osadl.org (updated Tue Dec 09, 2025 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3157674999795,1cyclictest0-21swapper/109:47:001
3157673999686,7cyclictest3172235-21latency_hist07:55:010
3157674999472,20cyclictest3227137-21apt-get10:45:011
3157673999288,3cyclictest3251560-21kworker/u8:1+events_unbound12:25:250
3157674999182,5cyclictest3207805-21kworker/u8:1+flush-179:010:10:261
3157674998676,7cyclictest3157544-21latency_hist07:10:031
3157673998681,4cyclictest3251560-21kworker/u8:1+events_unbound12:30:250
3157673998674,4cyclictest3251560-21kworker/u8:1+events_unbound12:05:200
3157674998576,6cyclictest3160406-21kworker/u8:2+flush-179:007:20:001
3157674998549,33cyclictest3160406-21kworker/u8:2+flush-179:008:00:311
3157674998272,7cyclictest3196626-21latency_hist09:10:011
3157674998266,13cyclictest3165766-21kworker/u8:3+flush-179:008:10:011
3157673998177,3cyclictest3212514-21kworker/u8:0+events_unbound10:50:250
3157673997969,7cyclictest3210941-21latency_hist09:55:010
3157673997963,11cyclictest271-21systemd-journal10:10:010
3157673997874,3cyclictest3198196-21kworker/u8:2+events_unbound09:15:240
3157674997667,7cyclictest3239025-21/usr/sbin/munin11:20:251
3157674997667,7cyclictest3239025-21/usr/sbin/munin11:20:251
3157673997672,3cyclictest3188658-21kworker/u8:0+events_unbound08:50:240
3157674997565,7cyclictest3188711-21kworker/u8:1+flush-179:008:50:011
3157673997570,4cyclictest3212514-21kworker/u8:0+flush-179:010:15:240
3157673997569,4cyclictest3198196-21kworker/u8:2+events_unbound09:25:190
3157673997564,8cyclictest3177013-21latency_hist08:10:010
3157673997470,3cyclictest3238819-21kworker/u8:0+events_unbound11:45:170
3157673997470,3cyclictest3230792-21kworker/u8:1+events_unbound10:55:270
3157673997469,4cyclictest3238819-21kworker/u8:0+events_unbound12:00:240
3157673997260,9cyclictest3219579-21kworker/u8:1+flush-179:010:30:010
3157674997163,6cyclictest3173876-21kworker/u8:1+flush-179:008:10:231
3157674996859,6cyclictest3237157-21kworker/u8:3+flush-179:011:15:251
3157673996863,4cyclictest3238819-21kworker/u8:0+events_unbound11:25:260
3157674996759,6cyclictest502-21rs:main1
3157674996752,10cyclictest3251560-21kworker/u8:1+events_unbound12:00:031
3157673996763,3cyclictest3183877-21kworker/u8:3+events_unbound08:40:260
4670791660,17ptp4l441ktimers/307:07:533
3157673996660,5cyclictest3198196-21kworker/u8:2+events_unbound09:20:180
3157673996654,8cyclictest3188711-21kworker/u8:1+flush-179:009:10:150
3157674996554,10cyclictest3196605-21kworker/u8:0+flush-179:009:40:001
3157674996456,5cyclictest3251560-21kworker/u8:1+flush-179:012:05:141
3157673996460,3cyclictest3196605-21kworker/u8:0+events_unbound09:45:270
3157673996459,4cyclictest3235574-21kworker/u8:2+flush-179:011:40:160
3157674996353,7cyclictest3180498-21kworker/u8:0+events_unbound08:20:231
3157674996353,7cyclictest3162610-21latency_hist07:25:011
3157673996358,4cyclictest3207805-21kworker/u8:1+flush-179:009:59:550
3157674996252,6cyclictest3230792-21kworker/u8:1+flush-179:010:55:251
3157674996251,8cyclictest3212514-21kworker/u8:0+flush-179:010:50:221
3157673996257,3cyclictest3251560-21kworker/u8:1+events_unbound12:15:200
3157673996156,4cyclictest3160406-21kworker/u8:2+flush-179:008:04:560
3157673996056,3cyclictest3233989-21kworker/u8:0+events_unbound11:10:180
3157674995952,5cyclictest3185724-21/usr/sbin/munin08:35:231
3157673995955,3cyclictest3173876-21kworker/u8:1+events_unbound08:10:250
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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