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2022-06-30 - 17:54

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 Thu Jun 30, 2022 12:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2794622500,27sleep10-21swapper/107:00:581
287319911319,48cyclictest141rcu_preempt09:00:342
28731991004,62cyclictest15816-21cc107:45:512
28731991004,62cyclictest15816-21cc107:45:512
2856729813,54sleep028570-21cron07:05:170
28725999680,8cyclictest0-21swapper/107:42:241
28725999680,8cyclictest0-21swapper/107:42:241
2862029116,46sleep228638-21unin-run07:05:192
63502900,5sleep20-21swapper/209:47:442
2872599894,14cyclictest17363-21as07:49:181
2872599894,14cyclictest17363-21as07:49:181
28731998762,16cyclictest13622-21unixbench_singl09:05:522
2873199863,58cyclictest18401-21cc107:50:292
2873199863,58cyclictest18401-21cc107:50:292
28711998531,32cyclictest1773-21kworker/u8:207:44:480
28711998531,32cyclictest1773-21kworker/u8:207:44:480
28731998417,57cyclictest9806-21apt-get07:40:492
28731998417,57cyclictest9806-21apt-get07:40:492
28725998414,50cyclictest10550-21apt-get09:00:291
28731998336,25cyclictest141rcu_preempt10:05:372
28711998358,14cyclictest276-21systemd-journal11:10:170
28711998358,14cyclictest276-21systemd-journal11:10:170
28711998340,23cyclictest141rcu_preempt08:12:330
28731998244,10cyclictest141rcu_preempt12:24:512
2871199823,61cyclictest15811-21cc107:45:510
2871199823,61cyclictest15811-21cc107:45:510
28735998012,43cyclictest19845-21apt-get10:10:293
28735998012,43cyclictest19845-21apt-get10:10:293
28731998029,24cyclictest321ktimers/207:57:072
2872599805,12cyclictest19328-21as07:51:121
2872599805,12cyclictest19328-21as07:51:121
2872599794,13cyclictest0-21swapper/112:10:381
28735997826,21cyclictest17528-21as07:49:343
28735997826,21cyclictest17528-21as07:49:343
28731997845,11cyclictest141rcu_preempt10:11:122
28731997845,11cyclictest141rcu_preempt10:11:122
2873199783,47cyclictest12250-21diskmemload09:20:282
2873199783,47cyclictest12250-21diskmemload09:20:282
2872599784,17cyclictest18236-21latency_hist11:55:191
2872599783,16cyclictest6361-21runrttasks11:35:301
2872599782,9cyclictest22966-21make07:56:221
2872599782,15cyclictest25543-21grep12:05:541
28711997846,27cyclictest28700-21cyclictest07:39:480
28731997742,10cyclictest141rcu_preempt08:40:382
2872599774,17cyclictest21421-21apt-get09:20:201
28711997737,27cyclictest0-21swapper/007:51:110
28711997737,27cyclictest0-21swapper/007:51:110
28731997653,15cyclictest7294-21munin-plugin-st08:50:162
28731997640,13cyclictest141rcu_preempt10:36:092
28731997637,12cyclictest141rcu_preempt10:25:282
28731997637,12cyclictest141rcu_preempt10:25:282
2872599764,16cyclictest12872-21fschecks_time09:05:391
2872599764,13cyclictest8936-21cc107:39:481
2872599763,9cyclictest9355-21apt-get11:40:291
2872599762,10cyclictest24287-21/usr/sbin/munin08:00:411
2872599762,10cyclictest24287-21/usr/sbin/munin08:00:411
28711997651,16cyclictest12580-21fschecks_count11:45:370
28711997651,16cyclictest12580-21fschecks_count11:45:370
28711997631,20cyclictest141rcu_preempt09:23:150
28711997631,20cyclictest141rcu_preempt09:23:150
285042765,51sleep30-21swapper/307:04:313
2872599753,64cyclictest26306-21sed08:05:501
2872599753,17cyclictest2886-21fschecks_count08:35:371
2872599753,17cyclictest1210-21latency_hist09:40:191
2872599753,13cyclictest30484-21cut08:20:371
2872599752,11cyclictest4054-21/usr/sbin/munin12:25:411
28711997537,22cyclictest141rcu_preempt09:15:190
28711997533,22cyclictest141rcu_preempt12:21:010
28735997456,12cyclictest6896-21fschecks_time07:35:383
28731997445,9cyclictest141rcu_preempt09:15:192
28731997432,19cyclictest141rcu_preempt08:50:462
28731997429,16cyclictest141rcu_preempt07:39:432
2872599746,10cyclictest0-21swapper/110:10:291
2872599746,10cyclictest0-21swapper/110:10:291
2872599744,14cyclictest5679-21munin-run08:45:171
2872599743,19cyclictest30421-21/usr/sbin/munin11:20:471
2872599743,16cyclictest20647-21/usr/sbin/munin11:05:271
2872599743,16cyclictest20647-21/usr/sbin/munin11:05:271
2872599743,14cyclictest3457-21wc10:36:121
2872599742,48cyclictest22042-21ssh09:20:391
2872599742,48cyclictest22042-21ssh09:20:391
2872599742,16cyclictest3996-21grep07:25:461
28711997437,11cyclictest22798-21timerwakeupswit07:56:210
28731997333,20cyclictest0-21swapper/211:00:162
2872599734,19cyclictest21137-21munin-run12:00:161
2872599734,18cyclictest392-21runrttasks12:25:191
2872599734,15cyclictest22796-21apt-get10:15:311
2872599734,13cyclictest14222-21munin-run10:55:161
2872599733,18cyclictest4257-21timerwakeupswit11:30:501
2872599733,17cyclictest32711-21/usr/sbin/munin11:25:411
2872599733,17cyclictest32711-21/usr/sbin/munin11:25:411
2872599733,16cyclictest9466-21fschecks_time08:55:381
2872599733,16cyclictest24829-21/usr/sbin/munin09:25:511
2872599733,15cyclictest18292-21awk11:00:461
28725997326,37cyclictest0-21swapper/109:45:411
2872599732,16cyclictest1139-21cpuspeed08:30:351
2872599732,16cyclictest1139-21cpuspeed08:30:351
28725997310,56cyclictest0-21swapper/109:10:291
28711997326,22cyclictest611-21in:imklog11:44:280
28735997222,21cyclictest31966-21ssh11:24:023
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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