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2025-08-22 - 00:08
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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 rackbslot7.osadl.org (updated Thu Aug 21, 2025 12:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
23270211710,71sleep123283-21/usr/sbin/munin06:58:471
23270211710,71sleep123283-21/usr/sbin/munin06:58:471
24310991102,83cyclictest19608-21kworker/u19:0+flush-179:009:38:370
23421210911,64sleep223482-21mailstats06:58:562
23421210911,64sleep223482-21mailstats06:58:562
1466521080,7sleep00-21swapper/011:29:210
24314991052,33cyclictest141342ssh09:28:471
243149910441,12cyclictest0-21swapper/110:38:121
24310991042,66cyclictest25109-21apt-get11:48:470
243149910345,50cyclictest0-21swapper/111:49:451
24314991033,38cyclictest356-21runrttasks11:43:271
243149910327,14cyclictest0-21swapper/110:38:471
243149910327,14cyclictest0-21swapper/110:38:471
24310991032,70cyclictest375-21snmpd09:43:400
24310991032,70cyclictest375-21snmpd09:43:400
243149910036,10cyclictest0-21swapper/111:14:011
24314991003,41cyclictest8578-21latency_hist07:53:161
2431499984,39cyclictest19826-21find11:38:501
2431499984,39cyclictest19826-21find11:38:501
2431499973,38cyclictest31261-21fschecks_time11:58:321
2431499973,34cyclictest4252-21ssh12:08:161
24314999733,10cyclictest0-21swapper/108:28:401
24314999733,10cyclictest0-21swapper/108:28:401
24314999732,12cyclictest0-21swapper/109:33:521
2431499964,39cyclictest13914-21fschecks_count08:08:361
24314999633,10cyclictest0-21swapper/112:08:451
2431499953,37cyclictest11579-21grep11:23:491
24314999533,13cyclictest0-21swapper/108:23:141
24314999533,13cyclictest0-21swapper/108:23:141
24314999532,11cyclictest0-21swapper/110:13:491
2431499944,33cyclictest29763-21acpi07:18:251
24314999441,14cyclictest13375-21ssh12:23:351
2431499943,38cyclictest2868-21acpi10:08:231
2431499943,36cyclictest29353-21cut08:54:321
2431499943,36cyclictest29353-21cut08:54:321
24314999431,13cyclictest0-21swapper/109:44:211
24314999431,13cyclictest0-21swapper/109:44:211
2431499942,40cyclictest6900-21ls07:48:161
2431499942,36cyclictest26618-21cstates07:08:321
2431499934,35cyclictest26078-21munin-node09:58:241
2431499933,39cyclictest31768-21grep07:23:401
2431499933,35cyclictest20160-21latency_hist08:28:151
2431499933,35cyclictest20160-21latency_hist08:28:151
2431499933,32cyclictest9006-21kernelversion07:53:411
2431499932,27cyclictest11376-21awk09:23:421
2431499932,27cyclictest11376-21awk09:23:421
24320999227,25cyclictest25099-21munin-run08:43:142
24320999224,26cyclictest0-21swapper/211:38:242
24320999224,26cyclictest0-21swapper/211:38:242
2431499924,42cyclictest26277-21mailstats08:44:461
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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