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2025-07-12 - 12:43
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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 Sat Jul 12, 2025 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
94569912960,14cyclictest16235-21latency_hist22:56:000
9476991123,79cyclictest658-21apt-get00:21:302
9476991123,79cyclictest658-21apt-get00:21:302
9476991123,79cyclictest658-21apt-get00:21:302
3265621030,5sleep10-21swapper/122:27:371
8455210214,59sleep07981-21/usr/sbin/munin19:01:310
916321017,17sleep10-21swapper/119:03:531
9476991002,85cyclictest7030-21apt-get23:36:112
9456991003,71cyclictest31223-21apt-get22:26:320
947699993,35cyclictest31497-21diskmemload21:31:042
9476999846,44cyclictest0-21swapper/220:00:592
947699983,34cyclictest1-21systemd23:55:572
9456999846,30cyclictest375-21snmpd22:02:260
947699963,32cyclictest24566-21latency_hist19:51:002
80602958,57sleep28115-21expr19:01:172
9476999456,32cyclictest16621-21diskmemload23:15:412
947699945,32cyclictest4823-21apt-get22:36:312
947699945,32cyclictest4823-21apt-get22:36:312
84322940,6sleep30-21swapper/321:46:323
84322940,6sleep30-21swapper/321:46:323
9476999348,40cyclictest19331-21kworker/u18:0+events_unbound19:55:572
9476999348,40cyclictest19331-21kworker/u18:0+events_unbound19:55:572
9476999340,45cyclictest0-21swapper/200:06:312
9476999338,48cyclictest0-21swapper/222:31:102
947699933,34cyclictest19256-21fschecks_count23:56:202
9476999238,47cyclictest1926-21cpuspeed20:21:132
947699914,41cyclictest27648-21fschecks_time00:11:212
947699914,41cyclictest27648-21fschecks_time00:11:212
947699913,35cyclictest25640-21kernelversion22:16:222
947699913,35cyclictest25640-21kernelversion22:16:222
947699913,32cyclictest10410-21apt-get20:46:282
9476999060,21cyclictest16621-21diskmemload21:45:592
947699904,30cyclictest4442-21/usr/sbin/munin23:31:302
947699903,35cyclictest6035-21cut00:31:192
947699903,35cyclictest3521-21fschecks_time00:26:212
947699903,35cyclictest24742-21apt-get23:10:562
947699903,35cyclictest24742-21apt-get23:10:562
947699903,34cyclictest13314-21/usr/sbin/munin19:16:122
947699903,33cyclictest20317-21grep19:36:302
947699903,27cyclictest28703-21/usr/sbin/munin23:16:232
9476999028,56cyclictest0-21swapper/219:13:542
9476999028,56cyclictest0-21swapper/219:13:542
947699902,35cyclictest32535-21unixbench_singl22:27:182
947699894,35cyclictest22680-21if_eth022:11:242
947699893,33cyclictest1641-21latency_hist20:20:582
947699893,33cyclictest11020-21modprobe19:10:572
947699893,26cyclictest19586-21wc21:10:592
947699893,26cyclictest19586-21wc21:10:592
947699892,36cyclictest1373-21latency_hist23:25:592
9476998911,32cyclictest23321-21ssh00:02:482
947699883,39cyclictest13626-21runrttasks21:56:112
947699883,38cyclictest2947-21grep21:36:332
947699883,30cyclictest13367-21munin-run20:55:562
945699886,58cyclictest356-21runrttasks23:36:280
947699874,31cyclictest19438-21cpu22:06:142
947699874,31cyclictest19438-21cpu22:06:142
947699873,35cyclictest31470-21latency20:11:222
947699873,35cyclictest31470-21latency20:11:222
947699873,34cyclictest5211-21latency_hist20:31:012
9476998733,48cyclictest0-21swapper/223:50:562
947699873,33cyclictest30818-21grep00:16:292
947699873,32cyclictest29818-21tr20:06:222
947699873,31cyclictest22837-21latency_hist19:45:592
9467998762,18cyclictest16621-21diskmemload00:30:591
9456998744,28cyclictest21320-21rm00:00:160
947699864,33cyclictest21968-21ssh23:05:592
9476998638,39cyclictest0-21swapper/221:51:322
947699863,30cyclictest356-21runrttasks20:39:382
947699863,30cyclictest356-21runrttasks19:30:362
947699863,29cyclictest16756-21latency_hist21:05:592
9476998630,48cyclictest0-21swapper/223:41:272
947699853,36cyclictest18389-21fschecks_time19:31:272
947699853,35cyclictest16413-21latency_hist19:26:012
947699853,35cyclictest16413-21latency_hist19:26:012
947699853,33cyclictest10274-21latency_hist20:46:002
947699853,33cyclictest10274-21latency_hist20:46:002
947699853,26cyclictest28501-21/usr/sbin/munin22:21:202
9476998527,9cyclictest0-21swapper/222:48:352
947699852,35cyclictest8530-21switchtime22:41:322
947699852,26cyclictest28033-21fschecks_count20:01:212
9476998513,28cyclictest8318-21needreboot21:46:282
9476998513,28cyclictest8318-21needreboot21:46:282
9476998437,39cyclictest0-21swapper/221:21:002
947699843,33cyclictest17225-21ssh22:01:312
947699843,33cyclictest16982-21ntp_offset22:56:252
947699843,32cyclictest16302-21latency_hist22:56:002
947699835,41cyclictest5317-21apt-get20:31:192
947699833,32cyclictest1665-21cstates23:26:132
9476998322,8cyclictest0-21swapper/221:21:212
9467998361,16cyclictest31829-21fschecks_time21:31:211
9456998367,8cyclictest0-21swapper/023:12:010
947699823,36cyclictest31428-21latency_hist21:31:022
947699823,36cyclictest31428-21latency_hist21:31:022
9467998256,12cyclictest181rcu_preempt20:51:181
9467998253,11cyclictest181rcu_preempt22:11:221
947699813,28cyclictest19960-21ssh21:11:152
9467998154,10cyclictest181rcu_preempt20:36:241
947699803,31cyclictest14044-21latency20:56:242
947699803,31cyclictest14044-21latency20:56:242
9456998052,19cyclictest24498-21latency_hist19:51:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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