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2026-04-13 - 22:51
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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 Mon Apr 13, 2026 12:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
191009911158,45cyclictest0-21swapper/210:28:182
191009910038,8cyclictest0-21swapper/210:28:532
191009910038,8cyclictest0-21swapper/210:28:532
1863921006,15sleep10-21swapper/107:01:041
1863921006,15sleep10-21swapper/107:01:041
212232990,8sleep30-21swapper/309:48:423
1910099992,75cyclictest3957-21cstates11:08:542
19100999832,13cyclictest0-21swapper/211:01:122
19100999772,18cyclictest1-21systemd09:33:162
19100999728,12cyclictest0-21swapper/210:53:332
19100999725,11cyclictest0-21swapper/207:13:542
19100999725,11cyclictest0-21swapper/207:13:542
1910099972,32cyclictest21067-21latency_hist08:48:182
19100999646,44cyclictest3357-21latency_hist11:08:192
19100999636,8cyclictest0-21swapper/212:31:092
19100999634,8cyclictest0-21swapper/212:03:412
19100999628,10cyclictest0-21swapper/209:48:522
1910099954,33cyclictest21811-21ls07:08:442
19100999435,10cyclictest0-21swapper/210:48:522
1910099943,31cyclictest8131-21latency_hist08:08:172
1910099943,31cyclictest8131-21latency_hist08:08:172
19100999433,12cyclictest0-21swapper/211:25:292
1910099943,30cyclictest32068-21grep07:38:532
19100999428,10cyclictest0-21swapper/211:33:562
1910099933,32cyclictest20707-21latency_hist10:43:192
19100999333,12cyclictest0-21swapper/210:08:402
19100999324,29cyclictest10073-21latency_hist12:13:192
1910099932,38cyclictest8811-21ntp_kernel_err08:08:442
1910099932,34cyclictest6622-21grep10:18:412
19090999373,13cyclictest26598-21runrttasks09:58:191
19090999373,13cyclictest26598-21runrttasks09:58:191
185302936,67sleep00-21swapper/006:59:360
185302936,67sleep00-21swapper/006:59:360
1910099924,33cyclictest352-21runrttasks09:39:242
1910099923,41cyclictest11931-21uname08:18:402
1910099923,40cyclictest2757-21latency_hist09:18:192
1910099923,36cyclictest18240-21latency_hist11:33:182
1910099923,35cyclictest28896-21munin-run09:08:182
1910099923,34cyclictest29400-21ssh09:08:312
1910099923,32cyclictest26566-21idleruntime07:23:382
1910099923,32cyclictest26566-21idleruntime07:23:382
19100999231,55cyclictest0-21swapper/208:23:452
19100999225,11cyclictest0-21swapper/207:28:372
1910099922,36cyclictest4928-21latency_hist07:58:172
1910099922,36cyclictest4928-21latency_hist07:58:172
1910099922,32cyclictest5386-21fschecks_time07:58:382
1910099922,32cyclictest5386-21fschecks_time07:58:382
1910099913,37cyclictest18989-21ssh10:38:532
1910099913,37cyclictest18989-21ssh10:38:532
1910099913,35cyclictest10065-21irqstats11:18:402
1910099913,35cyclictest10065-21irqstats11:18:402
1910099913,32cyclictest15733-21unixbench_singl08:28:522
1910099913,31cyclictest25242-21ps07:18:482
1910099913,31cyclictest25242-21ps07:18:482
1910099913,29cyclictest14197-21unixbench_singl12:18:532
1910099913,28cyclictest2061-21fschecks_count07:48:382
19100999131,9cyclictest0-21swapper/210:33:542
1910099912,35cyclictest30604-21latency_hist11:53:192
19090999161,19cyclictest22537-21unixbench_multi11:38:521
1910099903,37cyclictest21809-21fschecks_count11:38:372
1910099903,37cyclictest16666-21fschecks_time08:33:372
1910099903,36cyclictest29361-21latency_hist10:03:172
1910099903,33cyclictest11818-21/usr/sbin/munin09:33:422
1910099903,32cyclictest27525-21latency_hist11:48:182
1910099903,32cyclictest25407-21unixbench_multi08:58:522
19100999027,11cyclictest0-21swapper/211:18:172
1910099902,37cyclictest714-21needreboot07:43:432
1910099902,36cyclictest1979-21cut11:58:472
1910099902,30cyclictest23494-21grep08:53:472
1910099893,31cyclictest21536-21ls08:48:402
1910099893,31cyclictest21536-21ls08:48:402
1910099893,29cyclictest18877-21vmstat09:43:542
19100998931,11cyclictest0-21swapper/207:33:372
1910099892,37cyclictest24001-21fschecks_time09:53:372
1910099892,37cyclictest24001-21fschecks_time09:53:372
1910099892,33cyclictest29933-21grep10:03:382
19100998922,14cyclictest0-21swapper/210:13:402
19100998922,14cyclictest0-21swapper/210:13:402
1910099883,33cyclictest9952-21/usr/sbin/munin08:13:262
1910099883,31cyclictest6007-21cstates09:23:342
1910099882,35cyclictest18695-21mailstats08:38:472
1910099882,32cyclictest12907-21latency_hist12:18:182
19078998867,15cyclictest544-21cron07:33:160
1910099873,29cyclictest957-21latency_hist11:58:172
19090998761,15cyclictest8275-21kworker/u17:1-rpciod10:33:521
1909099873,68cyclictest19378-21apt-get07:03:451
1910099863,34cyclictest19842-21latency07:04:172
1910099862,34cyclictest2893-21/usr/sbin/munin09:18:332
19090998661,17cyclictest32335-21latency_hist10:08:181
19078998661,17cyclictest32052-21sendmail09:13:150
19078998646,29cyclictest9067-21kworker/u17:1+nfsiod12:12:360
19078998630,10cyclictest181rcu_preempt10:08:390
1910099853,50cyclictest16323-21apt-get12:23:312
1909099853,72cyclictest24775-21ssh11:43:331
19090998514,61cyclictest16634-21cat12:24:081
19078998451,17cyclictest181rcu_preempt10:28:530
19078998451,17cyclictest181rcu_preempt10:28:530
1911799833,52cyclictest24767-21chrt11:43:313
19090998365,11cyclictest26000-21sh07:23:151
19090998365,11cyclictest26000-21sh07:23:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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