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2025-12-02 - 08:30
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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 Tue Dec 02, 2025 00:45:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
319462780,4sleep00-21swapper/022:40:230
2847191630,4ptp4l0-21swapper/200:10:332
246482630,5sleep324649-21fschecks_count23:35:173
2847191590,5ptp4l0-21swapper/022:19:130
2847191580,4ptp4l11169-21/usr/sbin/munin21:55:280
2847191570,4ptp4l0-21swapper/221:48:532
2847191570,3ptp4l0-21swapper/222:04:582
2847191560,4ptp4l0-21swapper/020:15:500
281222560,4sleep00-21swapper/023:40:290
120452560,4sleep112046-21unixbench_singl23:05:311
2847191550,3ptp4l0-21swapper/022:20:270
2847191540,8ptp4l0-21swapper/319:05:273
2847191540,4ptp4l0-21swapper/221:15:272
2847191540,3ptp4l0-21swapper/223:05:312
2847191530,4ptp4l2916999cyclictest20:14:053
2847191530,4ptp4l0-21swapper/022:50:150
2847191530,4ptp4l0-21swapper/020:51:130
2847191520,5ptp4l0-21swapper/019:09:360
2847191520,4ptp4l0-21swapper/223:51:472
2847191520,4ptp4l0-21swapper/200:01:492
2847191520,3ptp4l0-21swapper/223:00:302
2847191520,3ptp4l0-21swapper/022:33:090
2847191520,2ptp4l18074-21kworker/2:020:55:232
2847191510,5ptp4l0-21swapper/219:05:462
2847191510,5ptp4l0-21swapper/023:23:340
2847191510,4ptp4l0-21swapper/200:18:032
2847191510,4ptp4l0-21swapper/122:35:491
2847191510,4ptp4l0-21swapper/122:16:431
2847191510,3ptp4l0-21swapper/221:52:452
2847191510,3ptp4l0-21swapper/221:25:272
2847191500,4ptp4l0-21swapper/121:14:151
2847191500,4ptp4l0-21swapper/100:38:211
2847191500,4ptp4l0-21swapper/021:50:000
2847191500,4ptp4l0-21swapper/020:29:170
2847191500,4ptp4l0-21swapper/020:22:270
2847191500,4ptp4l0-21swapper/019:30:390
2847191500,3ptp4l0-21swapper/221:10:152
2847191500,3ptp4l0-21swapper/123:24:521
2847191500,3ptp4l0-21swapper/023:50:290
2847191500,3ptp4l0-21swapper/023:14:380
2847191500,3ptp4l0-21swapper/000:20:320
2847191490,4ptp4l0-21swapper/120:39:031
2847191490,4ptp4l0-21swapper/023:56:420
2847191490,4ptp4l0-21swapper/023:35:060
2847191490,4ptp4l0-21swapper/022:46:140
2847191490,4ptp4l0-21swapper/022:46:140
2847191490,4ptp4l0-21swapper/021:28:500
2847191490,4ptp4l0-21swapper/000:35:540
2847191490,3ptp4l0-21swapper/121:03:331
2847191490,3ptp4l0-21swapper/119:37:151
2847191490,3ptp4l0-21swapper/020:05:310
2847191480,4ptp4l0-21swapper/321:55:283
2847191480,4ptp4l0-21swapper/219:44:192
2847191480,4ptp4l0-21swapper/120:41:451
2847191480,4ptp4l0-21swapper/021:38:250
2847191480,4ptp4l0-21swapper/000:14:200
2847191480,3ptp4l0-21swapper/121:36:591
2847191480,3ptp4l0-21swapper/121:31:391
2847191480,3ptp4l0-21swapper/100:27:031
2847191480,2ptp4l0-21swapper/321:48:593
2847191470,4ptp4l1437-21apt-get19:20:133
2847191470,4ptp4l0-21swapper/220:40:202
2847191470,3ptp4l0-21swapper/120:25:191
2847191470,3ptp4l0-21swapper/022:55:210
2847191470,3ptp4l0-21swapper/020:55:210
2847191470,2ptp4l121rcu_preempt20:36:203
2847191460,4ptp4l0-21swapper/222:55:402
2847191450,6ptp4l0-21swapper/023:45:270
2847191450,11ptp4l0-21swapper/120:47:031
2847191450,10ptp4l0-21swapper/322:11:543
2849491440,10getstats0-21swapper/300:15:133
2847191440,4ptp4l7454-21apt-get21:50:130
2847191440,4ptp4l0-21swapper/021:42:170
2847191440,3ptp4l0-21swapper/200:06:152
2847191430,8ptp4l0-21swapper/200:27:382
2847191430,5ptp4l0-21swapper/322:00:123
2847191430,4ptp4l23148-21apt-get21:15:123
2847191430,4ptp4l19507-21df22:15:153
2847191430,4ptp4l1818-21apt-get20:30:140
2847191430,4ptp4l16979-21df22:10:130
2847191430,3ptp4l13118-21apt-get19:45:120
2847191430,3ptp4l0-21swapper/022:00:160
2847191430,10ptp4l0-21swapper/300:31:193
2849491420,9getstats0-21swapper/321:30:033
2849491420,10getstats0-21swapper/321:29:033
2849491420,10getstats0-21swapper/320:40:143
2849491420,10getstats0-21swapper/300:05:143
2847191420,9ptp4l0-21swapper/220:04:052
2847191420,9ptp4l0-21swapper/200:24:322
2847191420,5ptp4l0-21swapper/200:30:232
2847191420,4ptp4l4465-21diskstats20:35:160
2847191420,4ptp4l30113-21apt-get21:30:132
2847191420,4ptp4l0-21swapper/123:53:471
2847191420,3ptp4l24902-21meminfo22:25:220
2847191420,3ptp4l0-21swapper/300:12:533
2847191420,10ptp4l0-21swapper/220:20:022
2849491410,9getstats0-21swapper/323:55:073
2849491410,9getstats0-21swapper/321:23:523
2849491410,10getstats0-21swapper/322:05:423
2849491410,10getstats0-21swapper/321:51:103
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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