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2026-04-30 - 14:26
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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 rackdslot3.osadl.org (updated Thu Apr 30, 2026 00:45:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
139491206172,22phc2sys0-21swapper/319:06:033
299172205171,22sleep00-21swapper/019:08:560
2959822050,72sleep10-21swapper/119:05:281
299192201169,21sleep20-21swapper/219:08:592
3207321380,4sleep23030099cyclictest19:10:272
139391940,1ptp4l14447-21latency_hist19:45:013
3029899649,12cyclictest14377-21taskset23:42:470
3029899595,19cyclictest0-21swapper/000:20:200
30298995910,10cyclictest3237-21wc20:25:250
30300995628,9cyclictest33-21ksoftirqd/221:50:202
3029899568,9cyclictest25676-21ptp4l-jitter20:05:230
3029899556,19cyclictest0-21swapper/023:10:230
30298995510,10cyclictest28616-21dpkg22:45:010
30298995510,10cyclictest18529-21grep00:00:130
296932540,5sleep23030099cyclictest20:15:142
296932540,5sleep23030099cyclictest20:15:142
30300995326,9cyclictest33-21ksoftirqd/220:00:002
3029899538,7cyclictest4247-21ssh19:20:240
3029899538,15cyclictest2553-21chrt21:30:250
30300995227,9cyclictest33-21ksoftirqd/221:40:172
3029899528,9cyclictest9940-21ls21:45:280
3029899519,8cyclictest6794-21if_enp1s023:20:160
30298995111,8cyclictest24229-21iostat_ios21:10:180
30298995111,8cyclictest16884-21python23:50:230
30298995110,8cyclictest610-21df_abs19:15:150
30298995110,10cyclictest30381-21awk19:10:120
30300995026,8cyclictest33-21ksoftirqd/219:15:202
3029899509,8cyclictest27547-21python22:40:240
3029899507,7cyclictest28980-21ps00:30:210
30298995010,8cyclictest10517-21python20:40:260
30298995010,7cyclictest31705-21apt20:20:120
30298995010,7cyclictest22253-21meminfo21:05:220
275292500,1sleep20-21swapper/222:40:232
3029899499,8cyclictest9220-21users19:30:270
3029899499,7cyclictest4311-21appstreamcli20:30:010
3029899499,7cyclictest13154-21irqstats19:40:190
3029899499,7cyclictest11970-21fw_packets20:45:170
3029899499,7cyclictest11970-21fw_packets20:45:160
3029899498,7cyclictest29259-21irqstats21:20:180
3029899498,7cyclictest21667-21apt-get00:10:100
3029899497,7cyclictest6616-21ssh19:25:260
3029899497,7cyclictest19142-21hddtemp_smartct21:00:170
3029899496,15cyclictest0-21swapper/021:15:130
3029899496,15cyclictest0-21swapper/021:15:130
30298994911,7cyclictest23566-21iostat_ios22:30:190
30298994910,7cyclictest22370-21df_inode20:00:140
3029899489,7cyclictest6738-21memory21:40:200
30300994722,8cyclictest33-21ksoftirqd/221:30:112
3029899477,8cyclictest29333-21apt-get22:50:100
30300994617,27cyclictest0-21swapper/221:35:232
3029899469,7cyclictest16797-21apt-get19:50:020
3029899467,9cyclictest0-21swapper/023:05:380
30298994610,17cyclictest11173-21hwlatdetect21:50:170
30300994521,9cyclictest33-21ksoftirqd/220:20:192
30300994518,9cyclictest33-21ksoftirqd/223:30:012
3030099450,7cyclictest321ktimersoftd/220:25:182
3029899459,7cyclictest29809-21hddtemp_smartct20:15:150
3029899459,7cyclictest29809-21hddtemp_smartct20:15:150
30300994418,8cyclictest33-21ksoftirqd/219:20:132
3030099440,6cyclictest321ktimersoftd/221:20:182
3029899448,6cyclictest16250-21apt-get20:55:120
30300994317,8cyclictest33-21ksoftirqd/220:55:152
30300994316,3cyclictest33-21ksoftirqd/220:46:072
30300994316,3cyclictest33-21ksoftirqd/220:46:062
30300994315,7cyclictest33-21ksoftirqd/200:04:582
3029899438,8cyclictest7095-21df_inode20:35:160
139391430,1ptp4l13353-21irqstats23:40:203
139391430,0ptp4l401ktimersoftd/323:10:073
139391430,0ptp4l401ktimersoftd/320:31:333
3030099425,4cyclictest33-21ksoftirqd/223:31:442
3030099422,5cyclictest33-21ksoftirqd/223:15:442
30300994219,8cyclictest33-21ksoftirqd/222:20:212
30300994218,8cyclictest33-21ksoftirqd/221:15:122
30300994218,8cyclictest33-21ksoftirqd/221:15:122
3029899429,6cyclictest18058-21sshd23:58:110
139391420,0ptp4l401ktimersoftd/321:21:183
139391420,0ptp4l401ktimersoftd/319:22:493
30301994133,5cyclictest41-21ksoftirqd/300:40:003
30299994136,3cyclictest25016-21grep20:05:191
3029899416,7cyclictest16227-21ls19:45:260
30298994110,9cyclictest785-21irqrtprio23:00:190
3029899409,8cyclictest31215-21df21:25:150
3029899408,7cyclictest3822-21perl21:35:150
134391400,2getstats0-21swapper/323:17:393
30299993933,4cyclictest14560-21sh23:45:011
3030099383,7cyclictest33-21ksoftirqd/221:00:132
3030099382,5cyclictest33-21ksoftirqd/223:35:332
30299993831,5cyclictest25-21ksoftirqd/121:58:271
30299993826,9cyclictest25-21ksoftirqd/122:35:001
3029999380,37cyclictest0-21swapper/121:36:041
3029999380,2cyclictest0-21swapper/121:46:031
139391380,0ptp4l401ktimersoftd/320:20:143
30301993732,3cyclictest41-21ksoftirqd/300:10:013
30301993730,4cyclictest41-21ksoftirqd/321:27:593
30301993725,10cyclictest41-21ksoftirqd/322:30:253
3030099376,28cyclictest0-21swapper/220:50:232
3030099375,10cyclictest33-21ksoftirqd/223:20:002
3030099373,4cyclictest33-21ksoftirqd/219:54:232
30300993733,2cyclictest311rcuc/222:30:252
30299993731,4cyclictest25-21ksoftirqd/100:19:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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