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2026-03-10 - 12:36
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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 Tue Mar 10, 2026 00:44:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12743991234,49cyclictest32387-21ssh00:05:480
12743991144,30cyclictest10841-21fschecks_count22:35:540
127439911421,27cyclictest18361-21latency_hist21:55:360
127439911338,65cyclictest0-21swapper/019:10:580
127439911338,65cyclictest0-21swapper/019:10:580
12743991133,31cyclictest4175-21apt-config22:25:370
12743991133,31cyclictest4175-21apt-config22:25:370
127439911325,10cyclictest0-21swapper/023:15:570
12743991123,38cyclictest352-21runrttasks22:26:180
12743991123,38cyclictest352-21runrttasks22:26:180
12743991118,95cyclictest3131-21apt-get00:10:480
12743991114,41cyclictest23973-21/usr/sbin/munin23:51:030
12743991113,32cyclictest29402-21rm00:00:480
11121211010,71sleep111123-21/usr/sbin/munin19:00:441
12743991092,36cyclictest11190-21cpuspeed23:30:480
127439910846,55cyclictest297-21systemd-logind20:55:340
127439910724,7cyclictest0-21swapper/021:55:570
12743991063,28cyclictest14424-21tune2fs23:35:550
127439910528,13cyclictest0-21swapper/019:40:360
12743991043,38cyclictest21265-21fschecks_time23:47:390
12743991042,21cyclictest9470-21fschecks_time00:20:550
12743991033,42cyclictest13709-21ps19:07:180
12743991033,33cyclictest19809-21apt-get23:45:330
12743991033,32cyclictest18173-21latency_hist19:20:360
127439910319,78cyclictest0-21swapper/023:56:060
127439910319,78cyclictest0-21swapper/023:56:060
12743991024,42cyclictest352-21runrttasks20:11:000
12743991023,33cyclictest17358-21cstates20:55:490
12743991023,33cyclictest17358-21cstates20:55:490
12743991023,32cyclictest8528-21/usr/sbin/munin22:31:480
12743991023,31cyclictest28877-21/usr/sbin/munin19:51:520
12743991023,29cyclictest7428-21rm23:24:310
12743991022,33cyclictest8053-21rm23:25:360
1227121028,75sleep00-21swapper/019:03:030
12743991014,35cyclictest27327-21ssh21:16:000
12743991014,29cyclictest12464-21latency_hist21:45:370
12743991014,22cyclictest15738-21ntp_states00:31:050
12743991014,22cyclictest15738-21ntp_states00:31:050
12743991013,34cyclictest31538-21/usr/sbin/munin23:11:000
12743991013,34cyclictest31068-21unixbench_singl19:56:160
12743991013,34cyclictest22753-21grep19:31:260
12743991013,33cyclictest16908-21fschecks_time22:45:560
12743991013,29cyclictest352-21runrttasks23:08:050
12743991013,29cyclictest352-21runrttasks23:08:050
127439910131,7cyclictest0-21swapper/000:25:590
12743991012,37cyclictest7339-21latency_hist20:25:350
127439910037,55cyclictest0-21swapper/022:05:440
12743991003,41cyclictest30856-21grep21:21:100
12743991003,34cyclictest21521-21ssh22:53:310
12743991003,28cyclictest25227-21grep19:40:550
12743999934,8cyclictest0-21swapper/022:15:360
1274399993,39cyclictest352-21runrttasks22:57:030
1274399993,35cyclictest8878-21latency_hist00:20:350
1274399993,35cyclictest8878-21latency_hist00:20:350
1274399993,33cyclictest6798-21fschecks_count21:35:550
1274399993,32cyclictest4963-21taskset20:16:060
1274399993,29cyclictest25589-21apt-get23:00:480
1274399983,34cyclictest21005-21ssh21:06:190
1274399983,33cyclictest21265-21apt-get19:30:330
1274399983,33cyclictest21265-21apt-get19:30:330
12743999827,9cyclictest0-21swapper/022:15:590
1274399982,37cyclictest9449-21fschecks_time20:30:570
1274399982,33cyclictest8896-21modprobe20:30:330
1274399982,33cyclictest12789-21fschecks_count21:45:550
1274399982,33cyclictest12789-21fschecks_count21:45:550
1274399982,29cyclictest32332-21grep20:01:100
12743999822,12cyclictest0-21swapper/021:30:500
12743999822,12cyclictest0-21swapper/021:30:500
286352970,6sleep30-21swapper/319:51:433
1274399973,37cyclictest24709-21grep21:11:130
1274399973,37cyclictest24709-21grep21:11:130
1274399973,36cyclictest27533-21tail19:46:110
1274399973,36cyclictest27533-21tail19:46:110
1274399973,36cyclictest20117-21unixbench_singl21:01:580
1274399973,33cyclictest10980-21uniq20:35:550
1274399973,32cyclictest13212-21grep20:41:100
1274399973,32cyclictest13212-21grep20:41:100
1274399973,29cyclictest1564-21timerandwakeup21:26:240
1274399973,24cyclictest13531-21latency_hist22:40:370
1274399973,24cyclictest13531-21latency_hist22:40:370
1274399972,26cyclictest19697-21latency_hist19:25:350
12743999625,8cyclictest0-21swapper/022:00:520
1274399952,36cyclictest2441-21latency_hist20:10:360
1274399952,36cyclictest2441-21latency_hist20:10:360
115282958,57sleep211594-21memory19:01:052
1277199942,66cyclictest19809-21apt-get23:45:481
1274399943,30cyclictest14264-21fschecks_time20:45:560
1274399943,30cyclictest14264-21fschecks_time20:45:560
12771999334,19cyclictest181rcu_preempt00:06:531
12771999323,31cyclictest181rcu_preempt21:25:501
1277199923,61cyclictest4347-21apt-get22:25:481
1277199923,61cyclictest4347-21apt-get22:25:481
12794999170,15cyclictest200-21systemd-journal22:07:522
12771999044,15cyclictest0-21swapper/123:52:451
12771998965,8cyclictest181rcu_preempt19:55:371
12771998959,8cyclictest181rcu_preempt22:14:421
12794998859,20cyclictest19798-21latency_hist23:45:362
12771998835,16cyclictest181rcu_preempt23:03:461
12771998753,8cyclictest181rcu_preempt22:55:581
12771998740,13cyclictest352-21runrttasks19:35:481
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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