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2026-03-13 - 10:34
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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 Fri Mar 13, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17139302269208,46sleep00-21swapper/019:07:490
17139222264192,27sleep10-21swapper/119:07:451
179699540,3rtkit-daemon0-21swapper/123:24:020
17779982530,3sleep10-21swapper/121:30:011
179699520,4rtkit-daemon1795-21rtkit-daemon23:49:090
179699500,4rtkit-daemon1795-21rtkit-daemon21:37:410
1714240995014,8cyclictest1-21systemd22:25:011
1714240995013,10cyclictest1843959-21grep23:00:201
1714240995011,11cyclictest1730484-21grep19:45:221
1714240994912,12cyclictest1790089-21grep21:45:221
1714240994911,11cyclictest1727362-21sh19:40:001
179699480,4rtkit-daemon1795-21rtkit-daemon20:49:150
1714240994820,22cyclictest1718727-21python319:20:021
1714240994813,13cyclictest1846543-21apt-get23:05:281
1714240994811,9cyclictest1-21systemd21:45:011
1714240994811,9cyclictest1-21systemd21:40:011
1714240994713,12cyclictest1820765-21apt-get22:30:061
1714240994712,14cyclictest1768191-21ntpq21:15:191
1714240994712,11cyclictest1899756-21latency_hist00:20:021
1714240994711,11cyclictest1759052-21sh21:00:011
1714240994710,11cyclictest1914596-21cat00:40:001
1714240994710,11cyclictest1839601-21sh22:55:001
1714240994615,9cyclictest1855609-21/usr/sbin/munin23:15:231
1714240994614,12cyclictest1762936-21diskmemload23:40:141
1714240994613,18cyclictest1762936-21diskmemload23:51:071
1714240994612,8cyclictest1886577-21ssh00:00:011
1714240994612,20cyclictest1832591-21apt-get22:45:131
1714240994612,11cyclictest1740412-21ntpq20:10:191
1714240994611,10cyclictest1852136-21ntp_states23:10:211
1714240994610,14cyclictest1749262-21sh20:35:001
17218812450,6sleep1251rcuc/119:25:201
1714240994515,9cyclictest1906071-21taskset00:27:051
1714240994515,8cyclictest1860492-21ssh23:22:291
1714240994515,8cyclictest1839846-21taskset22:55:141
1714240994514,12cyclictest1830781-21rm22:41:041
1714240994514,12cyclictest1737135-21python320:05:001
1714240994513,11cyclictest1871302-21rm23:37:551
1714240994512,12cyclictest1866733-21/usr/sbin/munin23:30:251
1714240994512,12cyclictest1772056-21ps21:20:241
1714240994512,11cyclictest1723435-21dpkg19:30:021
1714240994512,10cyclictest1862920-21systemctl23:25:241
1714240994511,12cyclictest1731404-21chrt19:50:021
1714240994511,10cyclictest1825865-21ntp_states22:35:201
1714240994511,10cyclictest1811398-21sed22:15:221
1714240994510,11cyclictest1755136-21systemd-run20:50:011
1714240994415,10cyclictest1878648-21taskset23:48:211
1714240994415,10cyclictest1808420-21ssh22:10:571
1714240994413,10cyclictest1894264-21sed00:10:271
1714240994412,11cyclictest1889923-21ssh00:04:531
1714240994412,11cyclictest1715150-21ntpq19:10:191
1714240994412,10cyclictest763-21dbus-daemon00:05:241
1714240994410,11cyclictest1817552-21apt-get22:25:121
1714240994316,11cyclictest1757043-21cron20:55:001
1714240994314,9cyclictest1909642-21chrt00:32:131
1714240994313,13cyclictest1793940-21/usr/sbin/munin21:50:251
1714240994313,11cyclictest1800831-21/usr/sbin/munin22:00:231
1714240994312,10cyclictest17980272chrt21:56:401
1714240994311,15cyclictest1728718-21sed19:40:251
1714240994311,13cyclictest1741886-21cut20:15:181
1714240994311,11cyclictest1752351-21wc20:40:221
1714240994311,10cyclictest1900452-21grep00:20:161
1714240994310,12cyclictest1749503-21cat20:35:151
18808482420,3sleep01880846-21tail23:50:260
171424099429,13cyclictest17648992sleep121:11:071
1714240994212,10cyclictest1738563-21awk20:05:231
1714240994211,9cyclictest1778142-21/usr/sbin/munin21:30:221
1714240994211,11cyclictest1743572-21/usr/sbin/munin20:20:171
1714240994211,10cyclictest1760339-21sed21:00:251
1714240994210,11cyclictest1804025-21wc22:05:191
1714240994210,11cyclictest1762209-21switchtime21:05:241
1714240994113,9cyclictest1733736-21grep19:55:191
1714240994112,11cyclictest1745865-21fschecks_time20:25:181
1714240994110,11cyclictest1717032-21expr19:15:141
179699400,3rtkit-daemon0-21swapper/020:58:280
179699390,4rtkit-daemon13-21ksoftirqd/020:15:320
179699390,3rtkit-daemon0-21swapper/000:08:550
179699380,6rtkit-daemon1795-21rtkit-daemon23:13:140
179699380,3rtkit-daemon0-21swapper/021:31:560
179699370,5rtkit-daemon1795-21rtkit-daemon21:40:120
179699370,3rtkit-daemon0-21swapper/119:28:120
179699370,3rtkit-daemon0-21swapper/023:30:270
179699370,3rtkit-daemon0-21swapper/021:13:140
179699370,3rtkit-daemon0-21swapper/020:21:210
179699370,3rtkit-daemon0-21swapper/019:53:350
179699360,3rtkit-daemon0-21swapper/022:06:370
179699360,3rtkit-daemon0-21swapper/019:42:160
179699350,3rtkit-daemon0-21swapper/022:44:330
179699340,4rtkit-daemon1795-21rtkit-daemon20:41:450
179699330,4rtkit-daemon1795-21rtkit-daemon22:50:570
179699330,4rtkit-daemon1795-21rtkit-daemon21:05:490
179699330,4rtkit-daemon1795-21rtkit-daemon19:17:210
179699330,3rtkit-daemon0-21swapper/122:22:280
179699320,4rtkit-daemon1795-21rtkit-daemon23:42:370
179699320,4rtkit-daemon1795-21rtkit-daemon00:39:140
179699310,4rtkit-daemon1795-21rtkit-daemon00:11:430
171423599310,7cyclictest1862660-21/usr/sbin/munin23:25:210
179699300,3rtkit-daemon1795-21rtkit-daemon21:25:330
179699300,3rtkit-daemon1795-21rtkit-daemon19:48:310
179699300,3rtkit-daemon0-21swapper/123:56:020
179699290,4rtkit-daemon1795-21rtkit-daemon22:38:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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