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2026-08-17 - 11:24
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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 17, 2026 00:45:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
138591212150,50phc2sys0-21swapper/319:09:443
289132204172,21sleep10-21swapper/119:09:051
289142202170,21sleep20-21swapper/219:09:052
286942201166,23sleep00-21swapper/019:06:140
2172821460,2sleep10-21swapper/122:10:121
1234221380,3sleep12927999cyclictest21:50:191
2928199701,11cyclictest15789-21apache200:07:093
239682690,4sleep10-21swapper/100:25:121
2928099654,23cyclictest12043-21fschecks_count22:55:172
2928099651,29cyclictest26048-21users21:10:292
2928099651,29cyclictest26048-21users21:10:282
2928099651,24cyclictest19182-21cut00:15:132
2928099641,24cyclictest8911-21cron21:45:012
2928099641,24cyclictest8911-21cron21:45:002
2928099640,30cyclictest15482-21mailstats23:00:262
2928099630,27cyclictest2942-21cut20:25:202
2928099621,23cyclictest17132-21expr20:55:152
2928099620,24cyclictest19108-21sort22:05:132
2928099610,23cyclictest11061-21awk19:35:252
2928099600,26cyclictest6011-21vmstat22:40:272
2928099600,25cyclictest10644-21cut20:40:212
2928099590,26cyclictest5817-21grep21:35:272
2928099590,25cyclictest15890-21awk20:50:252
2928099590,24cyclictest1025-21awk21:25:302
2928099590,22cyclictest6153-21latency_hist23:50:002
2928099580,24cyclictest1515-21latency_hist20:25:012
2928199560,15cyclictest1319-21snmpd19:35:253
2928099564,23cyclictest5377-21kernelversion19:25:212
2928099562,23cyclictest27505-21sed20:10:192
106442560,2sleep00-21swapper/021:45:240
2928099550,23cyclictest27501-21grep23:25:252
2928099550,22cyclictest18283-21awk23:05:242
2928099541,23cyclictest19596-21if_enp4s023:10:192
2928099540,23cyclictest13419-21sensors20:45:252
2928099540,22cyclictest29537-21sed21:20:142
146122540,2sleep10-21swapper/120:50:141
2928099531,23cyclictest28051-21ptp4l21:15:232
2928099530,25cyclictest10474-21grep22:50:242
2928099530,24cyclictest7983-21sed20:35:202
2928099530,24cyclictest21580-21cat23:15:152
2928099521,23cyclictest1319-21snmpd21:59:402
2928099520,23cyclictest2499-21sed23:40:212
2928099520,22cyclictest1319-21snmpd21:34:442
130302510,2sleep013031-21grep00:00:280
2928199507,7cyclictest31615-21latency_hist19:14:593
2928199500,16cyclictest2361-21ps22:35:193
2928199500,16cyclictest1656-21cat19:19:593
2928099503,20cyclictest991-21cat19:15:262
2928099501,21cyclictest24887-21hddtemp_smartct20:05:162
2928099500,25cyclictest20579-21awk21:00:242
2928099500,24cyclictest25195-21processes23:20:222
2928099490,22cyclictest32539-21phc2sys-jitter23:35:242
2928199481,12cyclictest30669-21tail00:35:273
2928099481,22cyclictest12038-21expr19:40:132
2927899481,9cyclictest21188-21sshd21:00:530
2928099470,25cyclictest28195-21grep22:20:262
2928099470,22cyclictest29760-21cut00:35:202
2928099470,22cyclictest17666-21cut19:50:192
29279994733,3cyclictest25-21ksoftirqd/122:15:161
29278994712,4cyclictest9-21ksoftirqd/023:20:250
135191470,7getstats2928199cyclictest22:18:213
2928199460,14cyclictest12075-21df_inode21:50:163
2928099461,21cyclictest17577-21latency22:00:202
2928099460,22cyclictest29158-21df_abs23:30:162
2928199450,15cyclictest5363-21sed20:30:193
2928099451,24cyclictest1319-21snmpd19:35:002
2928099450,23cyclictest16490-21cpuspeed_turbos00:10:142
2928099450,22cyclictest2225-21df19:20:162
2928099450,21cyclictest7320-21cut23:50:202
2927999455,7cyclictest25-21ksoftirqd/123:00:001
29278994510,5cyclictest9-21ksoftirqd/022:40:190
2928099440,23cyclictest12201-21irqrtprio00:00:202
2927999445,3cyclictest121rcu_preempt19:24:591
29279994413,3cyclictest25-21ksoftirqd/123:50:171
2927899440,7cyclictest9-21ksoftirqd/022:15:000
138491440,0ptp4l401ktimersoftd/323:06:323
2928199430,13cyclictest24795-21perl21:10:173
2928199430,13cyclictest24795-21perl21:10:173
2928099430,22cyclictest25213-21latency22:15:212
2927899435,3cyclictest121rcu_preempt19:45:310
29278994333,3cyclictest9-21ksoftirqd/023:20:000
135191430,2getstats0-21swapper/322:08:213
2928099423,28cyclictest30274-21latency20:15:192
2928099420,23cyclictest23384-21cat22:10:272
2928099420,22cyclictest22534-21cut20:00:212
2928099420,22cyclictest22534-21cut20:00:202
2928099420,20cyclictest15196-21sendmail_mailtr00:05:262
2927999425,3cyclictest25-21ksoftirqd/120:40:191
2927999423,10cyclictest25-21ksoftirqd/100:15:241
29278994237,3cyclictest9-21ksoftirqd/020:40:010
29278994228,3cyclictest9-21ksoftirqd/020:45:130
138491420,1ptp4l401ktimersoftd/300:33:543
138491420,0ptp4l401ktimersoftd/320:25:533
138491420,0ptp4l401ktimersoftd/320:10:013
138491420,0ptp4l401ktimersoftd/319:40:233
138491420,0ptp4l401ktimersoftd/300:19:183
2928199410,16cyclictest5533-21processes22:40:223
2928099410,22cyclictest6701-21cpuspeed22:45:132
2928099410,22cyclictest30947-21timerandwakeup19:10:262
2928099410,21cyclictest12384-21irqrtprio21:50:192
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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