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2025-12-31 - 22:47

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 highest latencies:
System rack4slot6s.osadl.org (updated Wed Dec 31, 2025 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1872822220,2sleep018727-21grep09:55:280
933921480,3sleep09340-21/usr/sbin/munin09:20:130
2320021340,2sleep023201-21modprobe12:20:010
3153121180,3chrt31529-21irqstats08:40:150
929621170,4chrt9294-21memory11:25:210
1513521150,4sleep015173-21users07:35:280
566621070,3sleep05670-21ntp_states09:05:220
3110121070,3chrt31102-21modprobe10:45:010
151102970,3sleep015111-21sshd11:47:320
186862910,3sleep018727-21/usr/sbin/munin07:50:210
46792900,2sleep04680-21awk09:00:290
194882900,4sleep019578-21date10:00:030
121602900,4sleep012163-21irqstats07:25:170
106512900,2sleep010650-21tr11:30:210
84852890,3sleep08555-21mailstats07:10:260
316562860,2sleep031657-21mailstats10:45:240
226952810,3sleep022697-21timerandwakeup10:10:280
692927822,30sleep06972-21irqstats07:05:160
8029997342,17cyclictest16008-21ntp_states09:45:220
8029997337,25cyclictest16885-21chrt11:55:130
8029997041,20cyclictest18316-21/usr/sbin/munin12:00:170
8029996540,16cyclictest25204-21/usr/sbin/munin08:15:230
8029996538,15cyclictest12196-21wc09:30:250
8029996339,14cyclictest21115-21df_inode08:00:130
8029996336,17cyclictest4001-21grep09:00:010
8029996335,15cyclictest23395-21fw_packets12:20:140
8029996239,12cyclictest4112-21/usr/sbin/munin11:05:170
8029996237,15cyclictest353-21uname08:45:170
8029996236,14cyclictest9403-21seq07:15:050
8029996235,15cyclictest26340-21/usr/sbin/munin10:25:210
156532620,3sleep015654-21latency_hist09:45:010
8029996136,14cyclictest28437-21runrttasks10:34:340
8029996135,15cyclictest12840-21/usr/sbin/munin11:40:020
8029996135,14cyclictest14044-21seq07:31:370
8029996132,16cyclictest27377-21cron08:25:010
8029996110,18cyclictest20889-21/usr/sbin/munin10:05:270
288142614,7sleep00-21swapper10:35:190
8029996036,16cyclictest8010-21/usr/sbin/munin11:20:200
8029996036,14cyclictest19831-21/usr/sbin/munin07:55:140
8029996036,13cyclictest25510-21seq10:21:340
8029996035,16cyclictest29080-21ntp_states08:30:210
8029996035,14cyclictest19713-21ntp_states12:05:210
8029996033,17cyclictest13426-21runrttasks09:35:240
8029996032,18cyclictest27324-21sshd08:24:330
802999599,16cyclictest30338-21ntpq08:35:190
802999596,18cyclictest10732-21/usr/sbin/munin07:20:140
8029995935,14cyclictest1262-21cut10:55:010
8029995934,16cyclictest288-21snmpd11:19:580
8029995934,15cyclictest3434-21chrt11:02:010
8029995933,14cyclictest16136-21/usr/sbin/munin07:40:170
8029995931,19cyclictest1579-21/usr/sbin/munin10:55:220
8029995931,18cyclictest276-21runrttasks07:45:080
8029995925,20cyclictest5505-21sh11:10:230
8029995836,13cyclictest21630-21runrttasks12:13:060
8029995834,15cyclictest28159-21seq12:38:450
8029995834,15cyclictest23824-21wc08:10:170
8029995834,13cyclictest24665-21df_inode12:25:160
8029995830,18cyclictest2664-21runrttasks08:55:010
8029995821,22cyclictest7405-21sshd09:11:330
802999579,19cyclictest17192-21memory09:50:170
802999579,17cyclictest13265-21/usr/sbin/munin11:40:210
8029995735,14cyclictest23416-21runrttasks08:09:230
8029995733,14cyclictest10709-21irqstats09:25:170
8029995724,21cyclictest7957-21/usr/sbin/munin09:15:170
8029995632,12cyclictest26473-21users12:30:300
8029995625,17cyclictest307-21munin-node11:50:110
8029995610,19cyclictest24636-21munin-run10:20:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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