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2026-04-01 - 01:37
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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
Characteristics of the 50 highest latencies:
System rackcslot2.osadl.org (updated Tue Mar 31, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2013527051,8sleep00-21swapper/007:08:430
1992827057,8sleep10-21swapper/107:06:351
21032680,0sleep00-21swapper/007:44:300
164532670,0sleep00-21swapper/010:14:070
115542640,0sleep111555-21sh10:05:531
288812500,0sleep10-21swapper/112:01:091
20367993632,3cyclictest12956-21if_eth012:24:311
20367993533,1cyclictest19531-21irqstats08:29:331
20367993532,2cyclictest3653-21apache_processe07:49:281
20367993532,2cyclictest32414-21df_inode07:39:291
20367993532,2cyclictest32414-21df_inode07:39:291
20367993532,2cyclictest31269-21apache_accesses09:49:281
20367993532,2cyclictest26789-21memory07:24:321
20367993531,3cyclictest9336-21ssh10:04:021
20367993531,3cyclictest2073-21apache_processe09:09:261
20367993432,1cyclictest30833-21diskstats12:04:291
20367993432,1cyclictest22531-21diskstats07:14:301
20367993431,2cyclictest5865-21cut11:29:281
20367993431,2cyclictest3252-21users11:24:371
20367993431,2cyclictest30888-21apache_volume11:19:271
20367993431,2cyclictest25993-21ssh10:26:201
20367993431,2cyclictest20357-21ls10:19:281
20367993431,2cyclictest13306-21apache_accesses10:09:271
20367993431,2cyclictest10502-21open_files09:19:341
20367993430,3cyclictest14337-21ssh11:40:331
20367993430,2cyclictest1199-21runrttasks09:45:471
2036799334,15cyclictest0-21swapper/109:24:281
20367993331,2cyclictest0-21swapper/107:29:331
20367993331,1cyclictest15169-21apache_volume08:19:281
20367993330,2cyclictest15607-21ssh10:57:391
20367993330,2cyclictest13578-21hddtemp_smartct08:14:311
20367993330,2cyclictest0-21swapper/111:14:361
20367993230,2cyclictest23193-21smartctl08:39:311
20367993230,2cyclictest1863-21diskmemload10:15:481
20367993230,2cyclictest1863-21diskmemload09:44:091
20367993230,1cyclictest27389-21apache_volume10:29:281
20367993229,2cyclictest31145-21/usr/sbin/munin10:34:271
20367993229,2cyclictest26645-21awk11:59:161
20367993229,2cyclictest18157-21ssh11:45:591
20367993229,2cyclictest10884-21taskset08:06:361
20367993229,2cyclictest10815-21ssh11:35:311
20367993229,2cyclictest0-21swapper/112:31:151
20367993228,3cyclictest5878-21sed12:14:331
20367993228,3cyclictest29338-21ntp_states08:54:331
20367993129,1cyclictest20737-21memory11:04:321
20367993128,2cyclictest5849-21/usr/sbin/munin10:44:301
20367993128,2cyclictest19907-21if_eth212:34:291
20367993127,3cyclictest25385-21memory08:44:341
20367993126,4cyclictest17255-21cstates08:24:311
20367993121,9cyclictest0-21swapper/111:09:311
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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