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2026-08-17 - 04:19
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Mon Aug 17, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24573212314,77sleep124579-21/usr/sbin/munin19:05:331
24573212314,77sleep124579-21/usr/sbin/munin19:05:331
254959911539,11cyclictest0-21swapper/021:45:140
25495991133,39cyclictest17202-21ssh00:10:300
254959911246,61cyclictest0-21swapper/021:55:050
25495991113,41cyclictest30798-21cat23:40:180
25495991113,41cyclictest30798-21cat23:40:180
254959911044,13cyclictest31660-21apt.systemd.dai00:33:200
25495991103,26cyclictest19399-21/usr/sbin/munin21:40:240
254959910941,8cyclictest0-21swapper/019:50:250
254959910938,12cyclictest0-21swapper/020:59:530
25495991093,30cyclictest32000-21/usr/sbin/munin22:00:180
25495991093,30cyclictest32000-21/usr/sbin/munin22:00:180
254959910841,11cyclictest22447-21ssh22:36:210
254959910841,11cyclictest22447-21ssh22:36:210
254959910745,55cyclictest24736-21sendmail_mailst23:30:280
254959910745,55cyclictest24736-21sendmail_mailst23:30:280
255159910652,29cyclictest24155-21threads00:20:292
255159910652,29cyclictest24155-21threads00:20:292
255159910651,48cyclictest1-21systemd22:22:402
255159910651,48cyclictest1-21systemd22:22:402
25495991065,27cyclictest24000-21awk00:20:270
25495991065,27cyclictest24000-21awk00:20:270
254959910636,14cyclictest32628-21diskmemload00:25:280
254959910611,34cyclictest1187-21ssh23:45:110
25495991054,27cyclictest13985-21cat21:30:290
25495991053,53cyclictest6491-21apt21:19:520
254959910511,34cyclictest20208-21fschecks_count20:30:580
25495991043,27cyclictest5923-21cpu22:10:090
25495991043,27cyclictest5923-21cpu22:10:090
25495991042,42cyclictest8974-21/usr/sbin/munin22:15:260
25495991042,27cyclictest25758-21cpu21:50:090
255079910381,15cyclictest32628-21diskmemload22:36:051
255079910381,15cyclictest32628-21diskmemload22:36:051
25495991033,37cyclictest25485-21cyclictest19:09:560
25495991033,37cyclictest25485-21cyclictest19:09:560
25495991033,30cyclictest27374-21fschecks_count23:35:150
25495991023,31cyclictest353-21runrttasks00:00:580
25495991013,28cyclictest377-21snmpd19:25:130
25495991003,25cyclictest353-21runrttasks23:52:290
2549599994,33cyclictest24526-21cron20:44:510
2549599994,33cyclictest24526-21cron20:44:510
2549599993,37cyclictest353-21runrttasks22:05:010
2549599993,24cyclictest15570-21/usr/sbin/munin23:15:310
2549599985,35cyclictest14981-21idleruntime-cro22:24:520
2549599985,35cyclictest14981-21idleruntime-cro22:24:520
25515999747,43cyclictest0-21swapper/221:00:302
25515999746,43cyclictest0-21swapper/200:30:172
25515999740,48cyclictest0-21swapper/219:19:532
2549599974,35cyclictest30659-21awk21:00:320
25515999646,43cyclictest31689-21kernelversion22:50:182
25515999646,43cyclictest31689-21kernelversion22:50:182
2549599964,32cyclictest28353-21mailstats19:15:280
2549599963,38cyclictest18452-21rm22:30:050
2549599963,38cyclictest18452-21rm22:30:050
2549599962,36cyclictest27797-21latency_hist22:44:540
2551599953,36cyclictest20396-21cut00:15:142
25515999443,44cyclictest27218-21switchtime00:25:282
25515999441,46cyclictest17436-21sh23:19:542
25515999435,9cyclictest0-21swapper/223:24:522
25515999435,9cyclictest0-21swapper/223:24:522
25515999433,8cyclictest0-21swapper/221:20:202
2551599943,32cyclictest3168-21latency_hist19:39:542
2549599944,34cyclictest353-21runrttasks20:12:570
2551599934,40cyclictest21258-21apt-get22:35:172
2551599934,40cyclictest21258-21apt-get22:35:172
2551599923,36cyclictest12056-21kernelversion20:05:582
2551599923,35cyclictest9671-21latency_hist19:59:552
2551599923,35cyclictest9217-21ssh23:05:272
2551599923,34cyclictest21938-21unixbench_singl23:25:332
25515999231,8cyclictest0-21swapper/222:56:302
2551599922,34cyclictest4044-21cmp23:49:542
2551599922,33cyclictest6292-21cron19:49:522
25515999140,45cyclictest3348-21sh22:05:242
25515999135,9cyclictest0-21swapper/223:54:542
2551599913,34cyclictest8095-21latency_hist19:54:562
2551599913,31cyclictest23774-21ps20:40:252
2551599913,31cyclictest23774-21ps20:40:252
25515999130,12cyclictest0-21swapper/220:59:322
25515999039,8cyclictest0-21swapper/221:35:172
25515999039,8cyclictest0-21swapper/221:35:172
25515999036,8cyclictest0-21swapper/221:55:082
25515999036,7cyclictest0-21swapper/220:35:252
2551599903,32cyclictest13354-21fschecks_count21:30:162
2551599903,31cyclictest20302-21fschecks_time20:31:012
2551599903,30cyclictest699-21grep19:30:242
2551599903,30cyclictest699-21grep19:30:242
2551599903,23cyclictest256632/usr/sbin/munin19:10:172
25515999023,13cyclictest0-21swapper/200:05:192
25515998973,8cyclictest0-21swapper/223:59:562
25515998966,16cyclictest27934-21latency_hist20:54:552
25515998962,19cyclictest32628-21diskmemload21:29:402
25515998962,19cyclictest32628-21diskmemload21:29:402
2551599894,27cyclictest20432-21/usr/sbin/munin21:40:282
2551599893,37cyclictest5102-21taskset23:00:032
2551599893,37cyclictest5102-21taskset23:00:032
2551599893,34cyclictest27797-21latency_hist22:44:542
2551599893,34cyclictest12442-21grep23:10:312
2551599893,33cyclictest28370-21fschecks_count22:45:142
2551599893,32cyclictest24944-21timerwakeupswit23:30:312
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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