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2026-04-19 - 22:25
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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 rackdslot1.osadl.org (updated Sun Apr 19, 2026 12:45:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2340221690,6sleep32309899cyclictest11:50:003
1101721660,5sleep02309599cyclictest09:00:280
3109321410,7sleep32309899cyclictest10:55:163
3097521220,5sleep22309799cyclictest07:25:182
81752710,7sleep02309599cyclictest12:25:180
134491640,4ptp4l9157-21sshd12:26:571
2309599613,15cyclictest0-21swapper/007:35:000
2309599604,15cyclictest18566-21latency_hist10:30:000
134491600,19ptp4l0-21swapper/310:45:143
2309599591,15cyclictest25551-21/usr/sbin/munin09:35:250
134491590,5ptp4l0-21swapper/110:06:511
134491590,4ptp4l0-21swapper/208:14:392
2309599587,10cyclictest13067-21tail10:15:240
2309599585,15cyclictest0-21swapper/007:40:140
2309599582,10cyclictest13737-21latency_hist08:00:000
134491580,3ptp4l0-21swapper/209:49:562
134491580,3ptp4l0-21swapper/208:02:112
134491580,3ptp4l0-21swapper/207:50:042
2309599576,11cyclictest0-21swapper/011:00:190
2309599576,11cyclictest0-21swapper/011:00:190
2309599573,15cyclictest0-21swapper/011:15:270
2309599572,10cyclictest19229-21fschecks_time10:30:170
2309599572,10cyclictest0-21swapper/012:24:590
134491570,4ptp4l0-21swapper/312:25:283
134491570,15ptp4l0-21swapper/210:20:122
2309599567,6cyclictest0-21swapper/007:35:230
134491560,3ptp4l0-21swapper/310:42:563
2309599547,16cyclictest26780-21sed11:55:200
2309599541,11cyclictest16190-21date09:15:010
2309599537,6cyclictest0-21swapper/008:50:160
2309599536,7cyclictest29131-21ls12:00:210
2309599532,11cyclictest7298-21cut07:45:160
134491530,4ptp4l0-21swapper/208:29:422
134491530,4ptp4l0-21swapper/108:12:241
134491530,2ptp4l0-21swapper/309:15:073
134491530,10ptp4l0-21swapper/211:44:002
2309599528,6cyclictest0-21swapper/008:15:130
2309599523,8cyclictest2147-21latency_hist08:45:010
2309599523,11cyclictest25837-21grep07:15:150
2309599521,8cyclictest2733-21/usr/sbin/munin12:15:240
2309599521,15cyclictest28807-21sed09:40:190
134491520,4ptp4l0-21swapper/010:40:290
134491520,11ptp4l0-21swapper/209:33:392
2309599514,9cyclictest4166-21switchtime11:05:270
134491510,5ptp4l33-21ksoftirqd/211:23:092
134491510,4ptp4l0-21swapper/110:48:071
134491510,4ptp4l0-21swapper/109:28:001
134491510,4ptp4l0-21swapper/007:05:540
134491510,3ptp4l0-21swapper/107:52:061
2309599508,6cyclictest0-21swapper/007:10:130
2309599504,10cyclictest25902-21expr10:45:140
2309599502,11cyclictest14403-21expr10:20:140
2309599501,10cyclictest9460-21df_abs07:50:140
134491500,5ptp4l0-21swapper/312:32:323
134491500,3ptp4l0-21swapper/208:50:562
134491500,3ptp4l0-21swapper/112:07:491
134491500,11ptp4l0-21swapper/211:57:512
2309599498,8cyclictest0-21swapper/012:05:250
2309599492,8cyclictest0-21swapper/008:05:130
134491490,4ptp4l0-21swapper/211:47:552
134491490,4ptp4l0-21swapper/108:59:591
134491490,4ptp4l0-21swapper/107:58:161
134491490,11ptp4l22556-21sshd07:06:551
134491490,11ptp4l0-21swapper/211:50:422
2309599488,6cyclictest0-21swapper/008:10:270
134491480,4ptp4l0-21swapper/210:30:252
134491480,4ptp4l0-21swapper/010:11:070
134491480,3ptp4l0-21swapper/210:13:382
134491480,11ptp4l0-21swapper/108:43:311
2309599477,6cyclictest0-21swapper/008:55:170
134691470,10getstats0-21swapper/110:59:001
134491470,4ptp4l0-21swapper/211:15:222
134491470,4ptp4l0-21swapper/210:25:192
134491470,4ptp4l0-21swapper/209:19:472
134491470,3ptp4l0-21swapper/107:34:301
2309599464,6cyclictest0-21swapper/008:30:270
2309599460,10cyclictest0-21swapper/008:00:130
134491460,4ptp4l0-21swapper/107:19:101
134491460,10ptp4l0-21swapper/011:42:430
2309599457,5cyclictest134691getstats12:10:120
2309599453,6cyclictest134691getstats09:30:140
2309599450,11cyclictest0-21swapper/008:45:200
134491450,9ptp4l0-21swapper/210:05:462
134491450,12ptp4l0-21swapper/207:10:202
134491450,10ptp4l0-21swapper/208:20:442
134491440,9ptp4l0-21swapper/207:19:292
134491440,9ptp4l0-21swapper/008:21:320
134491440,6ptp4l0-21swapper/309:25:293
134491440,4ptp4l392-21apt-get11:00:122
134491440,4ptp4l392-21apt-get11:00:122
134491440,3ptp4l0-21swapper/108:33:431
134491440,11ptp4l0-21swapper/207:55:152
134491430,9ptp4l0-21swapper/212:00:032
134491430,8ptp4l0-21swapper/209:57:262
134491430,3ptp4l6901-21apt-get07:45:122
134491430,3ptp4l5677-21iostat_ios11:10:180
134491430,10ptp4l0-21swapper/211:09:332
134491430,10ptp4l0-21swapper/109:15:421
23098994231,8cyclictest134491ptp4l09:55:123
2309699427,9cyclictest25-21ksoftirqd/108:00:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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