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2026-08-24 - 08:23
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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 100 highest latencies:
System rackdslot4.osadl.org (updated Mon Aug 24, 2026 00:45:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
186312205170,23sleep30-21swapper/319:09:063
186562202168,23sleep10-21swapper/119:09:251
184792201167,23sleep20-21swapper/219:07:092
185982199166,21sleep00-21swapper/019:08:400
867221540,5sleep11899399cyclictest21:00:011
1870128060,11sleep00-21swapper/019:10:010
128782620,2sleep30-21swapper/321:05:243
1899599593,19cyclictest0-21swapper/322:30:213
1899299583,11cyclictest4344-21cpuspeed_turbos19:45:130
1899299581,16cyclictest11291-21/usr/sbin/munin21:05:150
1899299563,18cyclictest0-21swapper/022:30:230
33702550,4sleep03373-21unixbench_multi21:50:300
1899299542,11cyclictest20475-21mailstats20:15:250
1899299534,10cyclictest30286-21awk23:50:220
1899599525,15cyclictest9128-21apt-get19:55:133
1899599525,15cyclictest8823-21runrttasks00:13:023
1899299522,12cyclictest11254-21sed21:05:010
1899299522,11cyclictest29272-21date22:45:020
1899299521,9cyclictest32524-21expr20:40:220
1899299521,11cyclictest15915-21awk22:15:270
221392510,2sleep20-21swapper/222:30:162
1899599515,16cyclictest23462-21taskset21:28:303
1899299512,11cyclictest23246-21awk20:20:260
1899299511,16cyclictest11602-21apt-get20:00:110
1899599508,16cyclictest31502-21date19:35:003
1899599506,17cyclictest21116-21runrttasks00:37:423
1899599506,11cyclictest9006-21cpuspeed_turbos21:00:123
1899299502,14cyclictest28825-21apt-get20:35:130
1899299501,17cyclictest7830-21cat00:10:200
1899299501,10cyclictest1493-21latency_hist21:50:000
1899299500,16cyclictest15258-21cut20:05:220
1899599495,7cyclictest8436-21runrttasks20:58:143
1899299491,16cyclictest18082-21mailstats22:20:250
1899299481,11cyclictest11548-21latency_hist00:20:010
1899299481,11cyclictest10764-21cat19:55:280
1899599477,8cyclictest27353-21ps19:25:203
1899599477,8cyclictest11651-21apt-get22:10:123
1899299472,8cyclictest14756-21hddtemp_smartct00:25:180
1899299471,10cyclictest10874-21timerwakeupswit22:05:380
1899299470,10cyclictest0-21swapper/023:55:220
1899599466,7cyclictest14060-21apt-get20:05:113
18993994610,4cyclictest25-21ksoftirqd/123:20:131
1899299461,8cyclictest26625-21apt-get19:25:120
1899599457,7cyclictest26406-21apt-config21:35:013
1899299450,7cyclictest24170-21apt-get22:35:120
1899299450,11cyclictest13881-21latency_hist22:15:020
1899299441,7cyclictest29078-21apt-get19:30:120
138491440,0ptp4l401ktimersoftd/320:40:203
1899599436,7cyclictest30485-21ls22:45:233
1899599435,8cyclictest719-21ps22:50:213
1899599435,16cyclictest1227-21runrttasks23:58:583
1899599435,15cyclictest20899-21runrttasks19:10:543
18993994337,3cyclictest25-21ksoftirqd/100:15:001
18993994311,8cyclictest25-21ksoftirqd/121:25:281
18993994310,3cyclictest25-21ksoftirqd/120:39:591
1899299433,7cyclictest10415-21ls23:10:190
1899299432,6cyclictest29315-21apt-get22:45:120
1899299430,7cyclictest5694-21ls00:05:270
1899299430,7cyclictest23915-21apt-get20:25:110
138491430,0ptp4l401ktimersoftd/323:50:193
1899299422,7cyclictest2145-21iostat_ios20:45:180
1899299422,7cyclictest18049-21users21:15:290
1899299420,7cyclictest19045-21apt-get22:25:100
138491420,0ptp4l401ktimersoftd/322:01:413
138491420,0ptp4l401ktimersoftd/321:20:183
1899599417,13cyclictest4250-21/usr/sbin/munin21:55:193
1899599417,13cyclictest23726-21apt-get22:35:033
1899399413,2cyclictest121rcu_preempt22:42:161
1899399411,5cyclictest25-21ksoftirqd/121:35:001
1899299411,7cyclictest6828-21df_inode20:55:140
138491410,0ptp4l401ktimersoftd/323:23:373
18993994036,2cyclictest25-21ksoftirqd/119:50:011
18993994036,2cyclictest25-21ksoftirqd/100:30:001
18993994035,3cyclictest25-21ksoftirqd/122:40:001
18993994035,3cyclictest25-21ksoftirqd/119:30:131
18993994034,3cyclictest25-21ksoftirqd/119:40:191
18993994034,3cyclictest25-21ksoftirqd/100:05:211
1899299401,7cyclictest2259-21hddtemp_smartct19:40:170
1899599394,13cyclictest9185-21/usr/sbin/munin22:05:193
1899599393,16cyclictest0-21swapper/323:46:113
1899399394,4cyclictest25-21ksoftirqd/123:10:261
18993993934,3cyclictest25-21ksoftirqd/119:25:011
18993993933,3cyclictest25-21ksoftirqd/122:00:001
18993993933,3cyclictest25-21ksoftirqd/120:05:151
1899399391,9cyclictest25-21ksoftirqd/123:35:001
1899399391,9cyclictest25-21ksoftirqd/123:35:001
1899299392,8cyclictest20591-21sensors_temp00:35:250
1899299391,7cyclictest12824-21memory00:20:220
138491390,1ptp4l18682-21chrt20:14:303
138491390,1ptp4l18682-21chrt20:14:303
1899599387,13cyclictest16205-21/usr/sbin/munin21:15:273
1899599385,7cyclictest17676-21ls22:20:213
18994993833,2cyclictest33-21ksoftirqd/222:00:002
18994993832,4cyclictest33-21ksoftirqd/223:40:102
18994993832,4cyclictest33-21ksoftirqd/221:30:002
1899399386,6cyclictest25-21ksoftirqd/120:40:201
1899399386,3cyclictest25-21ksoftirqd/120:55:011
18993993835,2cyclictest25-21ksoftirqd/119:40:001
1899299382,7cyclictest7191-21df_inode22:00:140
1899299381,7cyclictest24548-21iostat21:30:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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