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2026-03-17 - 23:59

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 100 highest latencies:
System rack4slot6s.osadl.org (updated Tue Mar 17, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2966322490,3sleep029660-21cat09:30:010
434122390,3sleep04339-21grep07:50:260
1026521350,3chrt10257-21ntp_states12:25:230
2173821270,4chrt21736-21sed11:05:020
2225721250,3chrt22256-21/usr/sbin/munin09:00:240
1178321220,2sleep011782-21wc10:25:250
272421180,4sleep02726-21timerandwakeup11:55:290
2344321170,2sleep023444-21/usr/sbin/munin09:05:190
650721140,4chrt6505-21entropy08:00:140
121821130,3chrt1132-21latency_hist07:40:030
653021100,3chrt6529-21tr10:05:190
215421090,3chrt2151-21ls11:55:020
1010421020,2sleep010105-21latency_hist10:20:030
258739910072,15cyclictest31145-21/usr/sbin/munin11:40:260
25873999871,15cyclictest25866-21entropy09:15:140
25873999870,16cyclictest11180-21seq10:24:010
25873999669,16cyclictest10689-21/usr/sbin/munin08:15:250
25873999669,15cyclictest21698-21runrttasks08:59:260
25873999668,16cyclictest23780-21sshd11:11:340
25873999667,18cyclictest29407-21runrttasks07:22:210
25873999569,15cyclictest8933-21/usr/sbin/munin12:20:170
25873999568,17cyclictest22046-21ntp_states11:05:220
25873999568,16cyclictest17947-21/usr/sbin/munin10:50:130
25873999567,17cyclictest19301-21cat08:50:020
25873999468,15cyclictest24731-21wc11:15:250
25873999452,16cyclictest15340-21awk08:35:010
25873999368,13cyclictest27307-21memory09:20:170
25873999367,15cyclictest12538-21/usr/sbin/munin12:35:260
25873999367,14cyclictest7446-21/usr/sbin/munin12:15:140
25873999366,15cyclictest6243-21date10:05:020
25873999267,15cyclictest3460-21seq07:47:580
25873999267,14cyclictest29473-21sort11:35:020
25873999267,13cyclictest1157-21/usr/sbin/munin09:45:130
25873999266,14cyclictest15396-21ls10:40:130
25873999264,17cyclictest31489-21ps07:30:250
25873999263,19cyclictest288-21snmpd07:28:380
25873999260,21cyclictest26111-21grep11:20:260
25873999258,20cyclictest26937-21/usr/sbin/munin11:25:160
25873999254,23cyclictest13998-21/usr/sbin/munin10:35:130
25873999168,12cyclictest13853-21seq10:34:530
25873999167,14cyclictest4471-21seq09:57:090
25873999166,13cyclictest6064-21modprobe12:10:010
25873999165,14cyclictest8524-21chrt08:07:050
25873999160,17cyclictest11529-21ntpq12:30:220
25873999156,20cyclictest1275-21/usr/sbin/munin07:40:250
25873999155,23cyclictest3512-21/usr/sbin/munin12:00:250
25873999155,21cyclictest13166-21ntpq08:25:210
25873999147,19cyclictest5851-21sshd07:56:290
25873999067,13cyclictest20110-21seq10:58:220
25873999065,14cyclictest595-21seq09:41:580
25873999064,15cyclictest5089-21ntp_states12:05:220
25873999064,14cyclictest27541-21ntp_states07:15:210
25873999063,16cyclictest1-21systemd09:11:330
25873998965,14cyclictest19920-21users08:50:250
25873998962,17cyclictest16835-21chrt08:40:130
25873998956,19cyclictest32152-21df11:45:120
25873998955,22cyclictest15458-21/usr/sbin/munin08:35:240
25873998859,17cyclictest276-21runrttasks08:21:020
25873998856,20cyclictest30967-21/usr/sbin/munin09:35:290
25873998854,19cyclictest9069-21df_inode08:10:150
25873998766,11cyclictest29995-21/usr/sbin/munin11:35:250
25873998763,14cyclictest26137-21sed07:10:170
25873998761,15cyclictest2823-21/usr/sbin/munin09:50:260
25873998754,18cyclictest29954-21ntpq09:30:200
25873998752,22cyclictest16592-21/usr/sbin/munin10:45:110
25873998460,15cyclictest276-21runrttasks10:10:020
25873998455,19cyclictest25943-21latency_hist07:10:030
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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