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2025-12-04 - 10:37
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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 rackcslot4.osadl.org (updated Thu Dec 04, 2025 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15878562258218,26sleep00-21swapper/019:05:580
15864792245202,28sleep10-21swapper/119:05:071
16450252520,1chrt1644465-21/usr/sbin/munin21:20:200
158833199438,8cyclictest13-21ksoftirqd/022:15:010
125899430,3rtkit-daemon1257-21rtkit-daemon00:17:500
158833399417,7cyclictest26-21ksoftirqd/121:50:251
1588333994023,15cyclictest26-21ksoftirqd/123:05:001
158833399397,9cyclictest26-21ksoftirqd/122:45:141
158833399391,10cyclictest26-21ksoftirqd/100:20:011
158833399380,9cyclictest1769350-21latency_hist00:15:011
158833399380,8cyclictest26-21ksoftirqd/119:18:461
1588331993813,8cyclictest13-21ksoftirqd/019:25:050
125899380,5rtkit-daemon1589094-21memory19:10:191
125899380,3rtkit-daemon0-21swapper/121:55:131
125899380,3rtkit-daemon0-21swapper/121:55:131
158833399372,5cyclictest26-21ksoftirqd/100:25:011
158833399372,4cyclictest26-21ksoftirqd/100:35:001
158833399370,9cyclictest1762243-21sshd00:03:261
158833399370,8cyclictest1786800-21sh00:40:001
125899370,4rtkit-daemon1643047-21ssh21:17:271
125899370,3rtkit-daemon0-21swapper/100:28:411
125899370,3rtkit-daemon0-21swapper/020:06:091
158833399366,7cyclictest26-21ksoftirqd/123:10:001
158833399361,8cyclictest26-21ksoftirqd/122:05:261
158833399360,7cyclictest1586356-1kworker/1:2H19:25:021
125899360,4rtkit-daemon1257-21rtkit-daemon22:29:301
125899360,3rtkit-daemon0-21swapper/123:24:271
125899360,3rtkit-daemon0-21swapper/020:54:061
158833399356,8cyclictest26-21ksoftirqd/120:15:161
158833399352,5cyclictest261ksoftirqd/122:35:181
158833399351,4cyclictest26-21ksoftirqd/122:15:011
158833399351,11cyclictest26-21ksoftirqd/119:49:591
158833399350,8cyclictest26-21ksoftirqd/119:40:011
158833399350,7cyclictest1723868-1kworker/1:1H23:55:011
158833199354,2cyclictest141rcu_preempt22:45:010
125899350,4rtkit-daemon1257-21rtkit-daemon22:01:301
125899350,4rtkit-daemon1257-21rtkit-daemon20:25:410
125899350,4rtkit-daemon1257-21rtkit-daemon00:26:370
125899350,3rtkit-daemon0-21swapper/123:55:211
125899350,3rtkit-daemon0-21swapper/021:08:121
158833399342,3cyclictest26-21ksoftirqd/119:30:001
158833399341,9cyclictest1694493-21apt-get22:30:141
158833399341,8cyclictest26-21ksoftirqd/119:20:191
125899340,4rtkit-daemon1257-21rtkit-daemon21:39:010
125899340,4rtkit-daemon1257-21rtkit-daemon20:53:430
125899340,4rtkit-daemon1257-21rtkit-daemon20:29:361
125899340,3rtkit-daemon1257-21rtkit-daemon20:40:040
125899340,3rtkit-daemon0-21swapper/120:32:040
125899340,3rtkit-daemon0-21swapper/021:36:221
125899340,3rtkit-daemon0-21swapper/021:21:311
1588333993322,3cyclictest0-21swapper/123:25:111
1588331993310,4cyclictest13-21ksoftirqd/000:04:490
125899330,3rtkit-daemon1257-21rtkit-daemon22:43:521
125899330,3rtkit-daemon1257-21rtkit-daemon20:19:500
125899330,3rtkit-daemon0-21swapper/000:05:271
158833399327,4cyclictest26-21ksoftirqd/121:05:001
158833399323,3cyclictest26-21ksoftirqd/120:00:011
158833399320,9cyclictest26-21ksoftirqd/122:55:011
158833399320,8cyclictest26-21ksoftirqd/123:00:011
158833399320,8cyclictest1738100-21apt-get23:30:121
125899320,4rtkit-daemon1257-21rtkit-daemon21:34:150
125899320,4rtkit-daemon1257-21rtkit-daemon20:31:561
125899320,3rtkit-daemon0-21swapper/123:38:440
125899320,3rtkit-daemon0-21swapper/122:30:440
125899320,3rtkit-daemon0-21swapper/021:34:221
125899320,3rtkit-daemon0-21swapper/020:57:181
125899320,3rtkit-daemon0-21swapper/020:21:301
158833399313,4cyclictest26-21ksoftirqd/120:15:011
158833399312,8cyclictest26-21ksoftirqd/123:12:361
158833399311,3cyclictest26-21ksoftirqd/119:45:011
1588333993111,8cyclictest26-21ksoftirqd/121:40:371
158833399310,9cyclictest26-21ksoftirqd/121:45:181
158833399310,8cyclictest26-21ksoftirqd/120:45:011
125899310,4rtkit-daemon1257-21rtkit-daemon21:08:040
125899310,3rtkit-daemon0-21swapper/122:05:270
125899310,3rtkit-daemon0-21swapper/021:14:311
125899310,3rtkit-daemon0-21swapper/020:39:441
158833399303,3cyclictest26-21ksoftirqd/123:50:011
158833399302,3cyclictest26-21ksoftirqd/121:25:131
158833399300,7cyclictest1742282-21/usr/sbin/munin23:35:221
158833199301,7cyclictest13-21ksoftirqd/022:45:270
1588331993012,4cyclictest13-21ksoftirqd/023:50:100
125899300,3rtkit-daemon0-21swapper/123:41:570
125899300,3rtkit-daemon0-21swapper/119:36:290
158833399291,8cyclictest1745188-21apt-get23:40:161
158833399291,7cyclictest26-21ksoftirqd/119:50:191
158833399290,9cyclictest26-21ksoftirqd/122:15:271
158833399290,8cyclictest26-21ksoftirqd/122:20:211
158833399290,7cyclictest1610238-21grep20:00:201
158833399290,10cyclictest26-21ksoftirqd/120:45:211
158833199298,9cyclictest13-21ksoftirqd/023:59:140
158833199297,9cyclictest13-21ksoftirqd/022:51:530
158833199294,9cyclictest13-21ksoftirqd/023:48:000
125899290,3rtkit-daemon0-21swapper/123:04:210
125899290,3rtkit-daemon0-21swapper/122:00:260
125899290,3rtkit-daemon0-21swapper/119:30:230
125899290,3rtkit-daemon0-21swapper/119:17:560
125899290,3rtkit-daemon0-21swapper/119:13:430
125899290,3rtkit-daemon0-21swapper/100:32:510
158833399283,4cyclictest26-21ksoftirqd/123:15:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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