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2025-11-18 - 17:47
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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 Nov 18, 2025 12:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30502499910492,5cyclictest3055010-21kworker/u8:2+events_unbound07:35:010
3050249999989,7cyclictest3082375-21latency_hist08:50:010
3050249999894,3cyclictest3074662-21kworker/u8:0+events_unbound08:30:250
3050249999079,8cyclictest3137766-21latency_hist11:40:010
3050249998882,5cyclictest3103290-21kworker/u8:2+events_unbound10:05:020
3050249998881,5cyclictest3116290-21kworker/u8:2+flush-179:010:35:260
3050250998776,8cyclictest3144120-21apt-get12:00:001
3050249998777,8cyclictest3053636-21/usr/sbin/munin07:20:230
3050250998679,5cyclictest3077634-21kworker/u8:1+flush-179:008:35:001
3050250998673,5cyclictest3074662-21kworker/u8:0+flush-179:008:40:001
3050249998474,7cyclictest3087155-21latency_hist09:05:000
3050250998372,8cyclictest3116300-21latency_hist10:35:001
3050249998277,4cyclictest3113161-21kworker/u8:1+events_unbound11:25:280
3050250998175,4cyclictest3063261-21kworker/u8:0+events_unbound07:55:241
3050249998170,4cyclictest3147600-21kworker/u8:1+flush-179:012:15:270
3050250998073,5cyclictest3123418-21kworker/u8:0+events_unbound10:55:301
3050249997975,3cyclictest3147600-21kworker/u8:1+flush-179:012:10:260
3050249997965,5cyclictest3113161-21kworker/u8:1+events_unbound11:30:010
3050249997669,5cyclictest3043891-21kworker/u8:1+events_unbound07:50:180
3050249997570,4cyclictest3103290-21kworker/u8:2+flush-179:010:15:260
3050249997562,11cyclictest3119759-21apt-get10:45:000
3050250997464,7cyclictest3132737-21latency_hist11:25:011
3050249997468,5cyclictest3085805-21kworker/u8:0+events_unbound09:20:240
3050249997368,4cyclictest3072873-21kworker/u8:3+events_unbound08:20:240
3050249997365,6cyclictest3088976-21/usr/sbin/munin09:10:250
3050249997359,4cyclictest3043891-21kworker/u8:1+events_unbound08:00:200
3050250997262,7cyclictest3101465-21latency_hist09:50:011
3050250997165,5cyclictest3121084-21kworker/u8:2+events_unbound10:45:251
3050249997167,3cyclictest3085805-21kworker/u8:0+flush-179:009:50:160
305025099700,68cyclictest723-21Xorg07:52:591
3050249997066,3cyclictest3099916-21kworker/u8:3+events_unbound10:20:250
3050249997066,3cyclictest3072873-21kworker/u8:3+flush-179:008:25:260
3050249997065,4cyclictest3136150-21kworker/u8:0+events_unbound12:00:250
3050249997065,4cyclictest3127994-21kworker/u8:2+flush-179:011:20:300
3050249997063,5cyclictest3051838-21kworker/u8:3+flush-179:007:20:000
3050249996963,5cyclictest3072873-21kworker/u8:3+events_unbound09:05:230
3050249996861,5cyclictest3113161-21kworker/u8:1+events_unbound10:50:210
3050250996761,4cyclictest3043891-21kworker/u8:1+flush-179:007:25:181
3050249996762,4cyclictest3072873-21kworker/u8:3+flush-179:008:35:220
3050249996761,4cyclictest3077634-21kworker/u8:1+events_unbound08:40:190
3050249996756,8cyclictest3051790-21latency_hist07:15:000
3050249996646,15cyclictest3066210-21apt-get08:00:010
3050250996559,4cyclictest3123418-21kworker/u8:0+events_unbound11:05:001
3050250996559,4cyclictest3123418-21kworker/u8:0+events_unbound11:05:001
3050250996558,5cyclictest3155511-21kworker/u8:3+events_unbound12:35:021
3050249996561,3cyclictest3085805-21kworker/u8:0+flush-179:009:25:210
3050249996558,6cyclictest3123418-21kworker/u8:0+events_unbound10:55:130
3050249996460,3cyclictest3150727-21kworker/u8:2+flush-179:012:20:200
3050249996460,3cyclictest3043891-21kworker/u8:1+events_unbound08:05:220
3050249996459,4cyclictest3137822-21kworker/u8:2+flush-179:011:40:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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