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2025-04-29 - 14:07
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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 rackeslot6.osadl.org (updated Tue Apr 29, 2025 00:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
145850899119111,6cyclictest1510373-21latency_hist22:05:010
14585089910793,11cyclictest1517766-21apt-get22:35:120
1458510999887,8cyclictest1520825-21gpgv22:45:011
1458508999895,2cyclictest0-21swapper/000:22:590
1458510999483,9cyclictest1538388-21kworker/u8:2+events_unbound00:00:011
1458508999185,4cyclictest1476250-21kworker/u8:0+events_unbound20:20:280
1458508999184,4cyclictest1466383-21kworker/u8:2+flush-179:020:00:010
1458510999081,7cyclictest1455353-21kworker/u8:1+flush-179:019:55:271
1458508998778,7cyclictest1466383-21kworker/u8:2+flush-179:020:20:010
1458510998673,11cyclictest1507438-21apt-get21:55:141
1458508998679,5cyclictest1544121-21kworker/u8:1+flush-179:000:35:260
1458510998573,9cyclictest1466383-21kworker/u8:2+events_unbound20:00:031
1458510998474,7cyclictest1506493-21kworker/u8:2+events_unbound22:05:031
1458508998477,5cyclictest1512519-21kworker/u8:1+flush-179:022:20:000
1458510998371,9cyclictest1534764-21kworker/u8:0+events_unbound00:15:001
1458512998279,2cyclictest0-21swapper/200:22:592
1458508998276,5cyclictest1455353-21kworker/u8:1+flush-179:019:45:240
1458508998276,5cyclictest1455353-21kworker/u8:1+flush-179:019:45:230
1458510998171,7cyclictest3105085-21systemd-journal20:35:001
1458508998174,5cyclictest1455353-21kworker/u8:1+flush-179:019:55:010
1458510997968,9cyclictest1502390-21/usr/sbin/munin21:35:231
1458510997964,11cyclictest1515132-21kworker/u8:2+flush-179:022:25:011
1458508997872,4cyclictest1506493-21kworker/u8:2+flush-179:021:55:260
1458508997868,7cyclictest1538388-21kworker/u8:2+flush-179:000:10:150
1458508997770,6cyclictest1529485-21kworker/u8:1+flush-179:000:05:000
1458510997664,8cyclictest3105085-21systemd-journal21:14:551
1458508997669,5cyclictest1534764-21kworker/u8:0+flush-179:000:30:000
1458508997669,5cyclictest1529485-21kworker/u8:1+flush-179:023:30:210
1458508997669,5cyclictest1529485-21kworker/u8:1+flush-179:023:30:210
1458510997564,8cyclictest1531573-21kworker/u8:3+flush-179:023:35:011
1458510997564,8cyclictest1531573-21kworker/u8:3+flush-179:023:35:001
1458510997561,11cyclictest1482815-21apt-get20:25:151
1458508997568,5cyclictest1471164-21kworker/u8:3+flush-179:020:05:240
1458508997568,4cyclictest1506493-21kworker/u8:2+flush-179:022:05:030
1458510997463,8cyclictest1476250-21kworker/u8:0+flush-179:020:20:251
1458510997462,5cyclictest1512519-21kworker/u8:1+events_unbound22:45:011
1458508997465,6cyclictest1529485-21kworker/u8:1+flush-179:023:50:160
1458508997464,8cyclictest1519371-21apt-get22:40:130
1458508997366,5cyclictest1526023-21kworker/u8:0+flush-179:023:20:000
1458508997366,5cyclictest1495249-21kworker/u8:0+flush-179:021:25:010
1458508997265,5cyclictest1506493-21kworker/u8:2+flush-179:021:50:190
1458510997162,7cyclictest3105085-21systemd-journal00:04:001
1458508997065,3cyclictest1462205-21kworker/u8:0+events_unbound19:30:010
1458510996959,8cyclictest3105085-21systemd-journal22:05:001
1458508996963,4cyclictest1544121-21kworker/u8:1+flush-179:000:30:180
1458508996962,5cyclictest1519078-21kworker/u8:2+flush-179:023:20:040
1458508996961,6cyclictest1455353-21kworker/u8:1+flush-179:019:15:260
1458508996857,8cyclictest1539754-21latency_hist00:00:020
1458510996757,7cyclictest1519078-21kworker/u8:2+flush-179:022:50:161
1458508996761,4cyclictest1484179-21kworker/u8:3+flush-179:020:35:260
1458508996760,5cyclictest1455353-21kworker/u8:1+flush-179:019:20:270
1458510996655,9cyclictest1466606-21apt-get19:35:121
1458508996661,3cyclictest1487570-21kworker/u8:1+flush-179:021:10:170
1458508996660,5cyclictest1512519-21kworker/u8:1+flush-179:022:30:000
1458508996660,4cyclictest1487570-21kworker/u8:1+flush-179:020:55:200
1458508996659,5cyclictest1487570-21kworker/u8:1+events_unbound20:50:220
1458508996655,8cyclictest1455353-21kworker/u8:1+events_unbound19:35:140
1458508996653,11cyclictest1497371-21apt-get21:15:130
1458508996559,4cyclictest1500640-21kworker/u8:1+flush-179:021:40:240
1458510996455,7cyclictest1456930-21kworker/u8:2+flush-179:019:10:221
1458510996350,10cyclictest1524658-21apt-get23:00:171
1458508996354,7cyclictest1541659-21latency_hist00:10:000
1458510996257,4cyclictest1526023-21kworker/u8:0+flush-179:023:10:001
1458508996250,10cyclictest1533378-21apt-get23:35:130
1458512996158,2cyclictest0-21swapper/222:40:592
1458508996153,5cyclictest1495249-21kworker/u8:0+flush-179:021:30:000
1458510996051,7cyclictest1526023-21kworker/u8:0+flush-179:023:10:161
1458510996044,14cyclictest1471358-21/usr/sbin/munin19:50:181
1458508996052,6cyclictest1455353-21kworker/u8:1+events_unbound20:00:160
1458508996050,7cyclictest1456930-21kworker/u8:2+events_unbound19:10:190
1458510995951,6cyclictest1487570-21kworker/u8:1+flush-179:021:00:161
1458510995951,5cyclictest1500640-21kworker/u8:1+flush-179:021:50:211
1458510995850,6cyclictest1500640-21kworker/u8:1+flush-179:021:30:161
1458510995849,6cyclictest1529485-21kworker/u8:1+flush-179:023:50:171
1458508995851,5cyclictest1512519-21kworker/u8:1+events_unbound22:45:040
1458508995851,5cyclictest1466383-21kworker/u8:2+events_unbound20:30:200
1458508995850,6cyclictest1500640-21kworker/u8:1+events_unbound21:40:010
145850899581,55cyclictest1-21systemd23:27:500
1458510995749,6cyclictest1466383-21kworker/u8:2+events_unbound20:15:001
1458510995748,7cyclictest1534764-21kworker/u8:0+flush-179:000:15:241
1458508995754,2cyclictest0-21swapper/023:00:590
1458508995752,4cyclictest1515132-21kworker/u8:2+flush-179:022:20:230
1458510995647,7cyclictest3105085-21systemd-journal22:58:501
1458510995646,7cyclictest1495249-21kworker/u8:0+flush-179:021:20:241
1458508995650,5cyclictest1512519-21kworker/u8:1+flush-179:022:30:200
1458508995646,8cyclictest1484179-21kworker/u8:3+flush-179:020:45:180
1458510995548,5cyclictest1462205-21kworker/u8:0+flush-179:019:30:001
1458510995546,6cyclictest1511146-21apt-get22:10:071
1458510995544,9cyclictest1466383-21kworker/u8:2+flush-179:020:15:191
1458508995551,2cyclictest1512519-21kworker/u8:1+events_unbound22:55:180
1458508995547,6cyclictest3105085-21systemd-journal23:09:500
1458510995344,7cyclictest3105085-21systemd-journal21:20:011
1458508995348,4cyclictest1506493-21kworker/u8:2+flush-179:022:10:130
1458510995247,4cyclictest1455353-21kworker/u8:1+events_unbound19:40:261
1458508995244,5cyclictest1519078-21kworker/u8:2+events_unbound22:50:100
1458510995141,6cyclictest1487570-21kworker/u8:1+flush-179:020:55:161
1458508995135,6cyclictest1487570-21kworker/u8:1+flush-179:021:00:230
1458510995032,17cyclictest0-21swapper/100:36:591
1458508995044,5cyclictest1526023-21kworker/u8:0+events_unbound23:10:170
1458508995043,5cyclictest1544121-21kworker/u8:1+flush-179:000:20:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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