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2026-04-02 - 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot7.osadl.org (updated Thu Apr 02, 2026 00:44:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2183421457,18sleep00-21swapper/018:59:360
228619912650,54cyclictest2234-21latency_hist19:39:052
22847991223,24cyclictest20584-21apt-get00:24:200
22847991196,29cyclictest25733-21/usr/sbin/munin22:44:120
21864211512,73sleep121895-21sed18:59:371
228619910941,38cyclictest30031-21diskmemload23:32:222
22847991093,22cyclictest11449-21taskset00:09:150
228619910837,36cyclictest0-21swapper/219:19:332
228619910837,36cyclictest0-21swapper/219:19:332
22847991083,26cyclictest32580-21ntpq23:49:310
22847991083,26cyclictest32580-21ntpq23:49:310
228619910735,35cyclictest0-21swapper/219:24:172
228619910735,35cyclictest0-21swapper/219:24:172
22847991073,31cyclictest9248-21grep23:09:390
22847991073,26cyclictest5220-21cpu23:04:170
22847991072,29cyclictest27586-21ntpq20:54:300
228479910650,49cyclictest0-21swapper/019:14:020
228479910645,54cyclictest22839-21cyclictest23:37:340
228479910645,54cyclictest22839-21cyclictest23:37:340
22847991063,35cyclictest352-21runrttasks22:19:300
22847991062,29cyclictest4994-21ssh23:58:310
22847991053,28cyclictest1-21systemd19:25:300
22847991053,28cyclictest1-21systemd19:25:300
228619910339,39cyclictest30031-21diskmemload23:51:522
228619910339,39cyclictest30031-21diskmemload23:51:522
228479910343,50cyclictest0-21swapper/019:49:020
22847991033,42cyclictest20657-21netstat23:29:370
228479910232,38cyclictest181rcu_preempt21:49:230
228479910228,67cyclictest0-21swapper/022:00:270
228479910228,67cyclictest0-21swapper/022:00:270
228619910149,43cyclictest5617-21cstates23:59:182
22861991003,50cyclictest25799-21ssh22:44:242
22847991008,11cyclictest15350irq/295-2188000.ethernet21:04:130
228479910042,51cyclictest0-21swapper/000:19:000
22847991003,23cyclictest28052-21latency_hist19:19:020
22847991002,27cyclictest2208-21/usr/sbin/munin22:59:350
22847991002,27cyclictest2208-21/usr/sbin/munin22:59:350
22847991002,25cyclictest23395-21timerandwakeup22:39:370
22855999967,24cyclictest20676-21kworker/u18:1+nfsiod23:10:401
2284799994,34cyclictest8999-21taskset00:04:260
2284799994,29cyclictest886-21/usr/sbin/munin21:09:270
2284799994,29cyclictest886-21/usr/sbin/munin21:09:270
2284799994,28cyclictest352-21runrttasks22:06:510
2284799994,28cyclictest352-21runrttasks22:06:510
2284799993,34cyclictest26314-21cut23:39:220
22847999916,10cyclictest0-21swapper/020:44:310
2284799984,30cyclictest15006-21sh21:32:310
2284799984,30cyclictest15006-21sh21:32:310
2284799983,31cyclictest16927-21cat23:24:040
2284799983,25cyclictest15791-21fschecks_time20:19:240
2284799983,24cyclictest5454-21switchtime22:09:380
22847999817,28cyclictest471-21sendmail19:34:020
22861999733,31cyclictest0-21swapper/223:55:052
22861999730,35cyclictest0-21swapper/222:09:042
22861999730,35cyclictest0-21swapper/222:09:042
2284799973,28cyclictest352-21runrttasks23:28:380
2284799973,28cyclictest352-21runrttasks23:28:380
2284799973,27cyclictest27914-21apt-get21:54:120
2284799973,27cyclictest27914-21apt-get21:54:120
22861999662,22cyclictest13850-21ssh23:19:022
2284799963,32cyclictest18576-21latency_hist21:39:010
2284799963,25cyclictest19917-21unixbench_multi21:39:390
2284799963,25cyclictest19917-21unixbench_multi21:39:390
2284799962,34cyclictest2504-1kworker/0:0H+mmc_complete20:09:050
2284799962,34cyclictest2504-1kworker/0:0H+mmc_complete20:09:050
22855999571,17cyclictest2575-21ssh22:59:261
22855999571,17cyclictest2575-21ssh22:59:261
22847999542,45cyclictest0-21swapper/021:04:040
2284799953,30cyclictest973-21tune2fs19:34:230
2284799952,21cyclictest6533-21unixbench_singl23:59:370
2286199943,78cyclictest0-21swapper/222:34:132
22847999439,46cyclictest0-21swapper/000:24:050
2284799943,30cyclictest2538-21grep19:39:230
2284799943,30cyclictest12591-21awk21:29:020
2284799943,26cyclictest16870-21fschecks_time22:29:230
22847999431,54cyclictest0-21swapper/023:14:180
22847999417,23cyclictest14651-21grep22:24:390
22861999343,38cyclictest0-21swapper/222:29:372
22861999327,35cyclictest0-21swapper/219:09:212
22855999376,10cyclictest27626-21modprobe21:54:021
2284799934,82cyclictest19882-21grep22:34:240
2284799934,28cyclictest352-21runrttasks20:50:220
2284799934,28cyclictest352-21runrttasks20:50:220
2284799934,27cyclictest20351-21/usr/sbin/munin20:34:280
2284799934,26cyclictest29654-21modprobe19:24:020
2284799934,26cyclictest29654-21modprobe19:24:020
2284799933,31cyclictest18801-21sort20:29:190
2284799933,31cyclictest10404-21latency_hist22:19:040
2284799933,31cyclictest10404-21latency_hist22:19:040
2284799933,26cyclictest31419-21modprobe22:54:020
2284799933,26cyclictest23016-21/usr/sbin/munin19:04:310
22847999312,10cyclictest0-21swapper/020:09:150
22847999312,10cyclictest0-21swapper/020:09:150
22861999237,36cyclictest0-21swapper/221:09:402
22861999237,36cyclictest0-21swapper/221:09:402
2284799923,34cyclictest7302-21/usr/sbin/munin21:19:260
2284799923,20cyclictest15171-21chrt20:18:070
2284799923,20cyclictest15171-21chrt20:18:070
22847999219,21cyclictest22358-21latency21:44:270
22847999210,9cyclictest0-21swapper/019:54:140
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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