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2023-02-07 - 18:27

ARM Freescale i.MX6 Quad @996 MHz, Linux 5.16.2-rt19 (Profile)

Latency plot of system in rack #b, slot #7
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
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, Linux 4.9.20-rt16, x86_64 highest latencies:
System rackbslot7 (updated Tue Feb 07, 2023 12:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9066991093,80cyclictest31904-21unixbench_multi11:21:520
90669910549,46cyclictest27186-21ssh11:15:160
7748210413,45sleep37763-21fschecks_count07:01:363
7748210413,45sleep37763-21fschecks_count07:01:363
9066991013,11cyclictest20775-21ssh10:09:420
9066991013,11cyclictest20775-21ssh10:09:420
9066991003,90cyclictest13909-21grep07:16:550
9066991002,8cyclictest27926-21ssh09:26:450
9066991002,8cyclictest27926-21ssh09:26:450
906699993,9cyclictest997-21unixbench_singl08:16:590
906699992,89cyclictest10714-21latency_hist07:11:120
909199982,65cyclictest14865-21/usr/sbin/munin09:01:363
9066999823,69cyclictest0-21swapper/011:16:500
906699963,6cyclictest0-21swapper/007:46:250
906699952,11cyclictest2332-21sensors08:21:490
906699945,79cyclictest9070-21latency_hist07:06:140
906699945,79cyclictest9070-21latency_hist07:06:140
906699942,10cyclictest21233-21rm11:59:020
906699942,10cyclictest21233-21rm11:59:020
906699934,13cyclictest11010-21unixbench_singl09:52:180
906699933,9cyclictest27525-21apt-get08:01:290
906699933,10cyclictest0-21swapper/012:05:000
906699933,10cyclictest0-21swapper/008:46:430
906699932,16cyclictest16621-21cat09:06:330
906699923,13cyclictest1363-21/usr/sbin/munin11:26:460
906699922,17cyclictest15833-21cpuspeed10:01:290
906699914,16cyclictest6991-21ssh11:36:100
906699913,81cyclictest30983-21modprobe12:16:100
906699912,9cyclictest25515-21ntpq09:21:470
9074999059,23cyclictest0-21swapper/109:26:551
9074999059,23cyclictest0-21swapper/109:26:551
9074999058,11cyclictest141rcu_preempt11:23:011
906699903,7cyclictest0-21swapper/011:01:280
906699903,77cyclictest3903-21latency_hist10:36:130
9066999030,51cyclictest0-21swapper/008:56:100
9066999030,51cyclictest0-21swapper/008:56:100
906699892,9cyclictest0-21swapper/011:06:550
906699892,11cyclictest23750-21ssh09:18:420
9066998834,46cyclictest19798-21latency09:11:450
906699882,18cyclictest397-21runrttasks07:14:120
906699882,18cyclictest397-21runrttasks07:14:120
906699882,16cyclictest30702-21date08:11:130
906699882,11cyclictest7464-21idleruntime-cro12:31:100
906699874,75cyclictest13187-21latency_hist11:46:120
906699873,77cyclictest16497-21ssh10:56:380
906699873,14cyclictest32372-21latency_hist08:16:130
906699873,14cyclictest32372-21latency_hist08:16:130
906699873,12cyclictest30691-21ssh09:31:280
906699873,12cyclictest15631-21sh11:50:200
906699872,8cyclictest0-21swapper/007:31:300
906699872,13cyclictest6588-21/usr/sbin/munin08:36:340
906699865,7cyclictest0-21swapper/010:11:300
906699865,7cyclictest0-21swapper/010:11:300
906699863,74cyclictest30564-21/usr/sbin/munin10:26:470
906699863,10cyclictest16338-21modprobe11:51:350
906699862,8cyclictest8221-21apt-get08:41:290
906699862,8cyclictest6962-21ssh09:46:330
906699853,9cyclictest5495-21ssh09:43:310
906699853,8cyclictest10009-21idleruntime-cro11:41:100
906699852,8cyclictest2441-21ssh12:21:440
906699852,76cyclictest24778-21ntpq07:51:450
9083998449,14cyclictest33-21ksoftirqd/209:27:472
9083998449,14cyclictest33-21ksoftirqd/209:27:472
906699843,14cyclictest17509-21modprobe07:31:110
906699842,20cyclictest5190-21ssh10:36:500
906699842,11cyclictest3541-21fschecks_time08:26:390
906699842,11cyclictest3541-21fschecks_time08:26:390
9074998350,10cyclictest141rcu_preempt09:33:221
906699833,9cyclictest0-21swapper/010:42:470
906699833,70cyclictest13594-21ntpq08:56:440
906699833,12cyclictest25437-21/usr/sbin/munin10:16:480
906699832,11cyclictest25484-21chrt12:06:350
906699822,9cyclictest25909-21apt-get07:56:300
906699822,7cyclictest13062-21ssh10:51:330
9083998160,13cyclictest13697-21runrttasks10:51:492
906699818,65cyclictest1040-21/usr/sbin/munin09:36:480
906699818,65cyclictest1040-21/usr/sbin/munin09:36:480
906699816,66cyclictest0-21swapper/008:35:170
906699813,8cyclictest0-21swapper/007:36:260
906699813,8cyclictest0-21swapper/007:36:260
906699813,7cyclictest0-21swapper/010:46:480
906699813,6cyclictest0-21swapper/012:16:340
906699812,17cyclictest22579-21wc07:46:130
906699812,15cyclictest8179-21/usr/sbin/munin12:31:360
906699812,13cyclictest29328-21tune2fs08:06:360
906699803,9cyclictest12773-21ssh09:56:240
906699802,14cyclictest28506-21timerandwakeup10:21:480
9074997948,17cyclictest141rcu_preempt07:31:371
906699793,17cyclictest15286-21switchtime07:21:480
906699793,10cyclictest15567-21cat09:02:000
9083997741,13cyclictest33-21ksoftirqd/208:11:302
9083997741,13cyclictest33-21ksoftirqd/208:11:302
9091997649,18cyclictest1253-21latency_hist11:26:123
9083997645,8cyclictest33-21ksoftirqd/211:30:372
9083997632,22cyclictest141rcu_preempt09:53:492
9074997531,26cyclictest141rcu_preempt09:59:161
9091997421,19cyclictest8317-21/usr/sbin/munin08:41:353
9091997418,23cyclictest7276-21/usr/sbin/munin09:46:403
9091997414,30cyclictest397-21runrttasks12:19:393
9083997450,15cyclictest10432-21/usr/sbin/munin10:46:372
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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