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2024-10-15 - 03:00

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #6

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 50 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack4slot6s.osadl.org (updated Tue Oct 15, 2024 00:44:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
438621390,3chrt4388-21wc23:40:290
641221340,3chrt6413-21munin-node23:50:100
585821210,4chrt5859-21mailstats19:35:270
3046021180,3sleep030462-21cat21:10:280
280521080,3sleep02803-21forks21:30:130
563921060,4sleep05323-21/usr/sbin/munin21:40:250
3198121010,3sleep032036-21users19:10:280
130772996,15sleep013148-21date20:05:020
90992980,2sleep09101-21latency_hist21:55:010
70372956,14sleep07035-21ntp_states19:40:220
160472950,3sleep016050-21sh20:15:230
326602926,12sleep032701-21if_eth021:20:140
4892900,3sleep0490-21awk23:25:270
185152896,11sleep018516-21ntp_states22:30:230
7482837,62sleep0821-21cat19:15:270
117852830,3sleep011833-21latency_hist20:00:020
317022780,2sleep031701-21timerwakeupswit23:20:290
3029327820,32sleep030334-21memory19:05:170
31349996118,13cyclictest2117-21/usr/sbin/munin19:20:250
3134999608,18cyclictest10480-21/usr/sbin/munin22:00:290
31349996033,17cyclictest13341-21/usr/sbin/munin22:10:220
31349996012,16cyclictest4242-21/usr/sbin/munin19:30:140
31349995918,15cyclictest16652-21cron20:55:020
31349995916,16cyclictest25266-21snmpd23:30:300
31349995910,16cyclictest28544-21/usr/sbin/munin23:10:110
3134999589,20cyclictest30125-21seq23:15:230
3134999589,17cyclictest3783-21latency_hist23:40:010
31349995834,15cyclictest21364-21/usr/sbin/munin20:35:270
31349995831,14cyclictest15756-21ntp_states00:25:230
31349995815,14cyclictest21539-21sshd22:41:290
31349995812,15cyclictest9759-21users21:55:290
31349995811,15cyclictest16707-21rs:main0
31349995810,18cyclictest19261-21sshd20:27:580
31349995810,15cyclictest26029-21df23:00:130
3134999578,16cyclictest22148-21runrttasks22:45:130
31349995732,17cyclictest12965-21/usr/sbin/munin00:15:150
31349995731,16cyclictest27990-21sshd23:06:300
31349995712,18cyclictest12356-21users22:05:270
31349995712,15cyclictest9070-21df_inode00:00:150
31349995710,34cyclictest27989-21users21:00:320
31349995710,17cyclictest15380-21latency_hist00:25:020
3134999568,16cyclictest24798-21/usr/sbin/munin20:50:270
3134999568,15cyclictest23436-21df22:50:140
3134999566,25cyclictest10353-21df_inode00:05:130
31349995633,15cyclictest15925-21/usr/sbin/munin22:20:210
31349995631,16cyclictest14557-21/usr/sbin/munin20:10:150
31349995612,15cyclictest18317-21ntp_states00:35:220
31349995610,15cyclictest5181-21df23:45:120
3134999559,15cyclictest16936-21/usr/sbin/munin22:25:090
3134999558,22cyclictest17031-21/usr/sbin/munin00:30:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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