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2026-07-15 - 00:55

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 here to display the system's profile data or here to proceed to next system.
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 792 highest latencies:
System rack4slot6s.osadl.org (updated Tue Jul 14, 2026 12:44:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2607522650,3sleep026074-21fw_packets12:05:130
2906422460,3sleep029068-21switchtime12:15:290
1236722460,3sleep012370-21sendmail_mailqu09:05:260
3175721240,3chrt31755-21users12:25:300
1091921240,4chrt10915-21mailstats11:05:250
2538521200,4chrt25384-21/usr/sbin/munin09:55:280
1989921200,4chrt19897-21memory09:35:170
146209912019,15cyclictest8915-21seq08:52:260
14620991198,12cyclictest25055-21ps12:00:250
2869621180,2sleep028697-21wc10:10:010
14620991189,19cyclictest457-21ntp_states10:25:220
14620991189,13cyclictest22491-21memory09:45:180
146209911810,15cyclictest18537-21ntp_states11:35:250
2401921170,3sleep024021-21awk07:45:210
14620991178,16cyclictest17406-21/usr/sbin/munin09:25:220
14620991178,15cyclictest27422-21irqstats12:10:170
14620991176,21cyclictest30026-21irqstats12:20:170
14620991168,17cyclictest19610-21runrttasks11:40:130
146209911630,76cyclictest10745-21/usr/sbin/munin09:00:140
14620991159,16cyclictest1517-21df_inode10:30:140
14620991159,15cyclictest5098-21chrt10:44:100
14620991159,15cyclictest13357-21ntpq11:15:210
14620991157,16cyclictest9359-21/usr/sbin/munin08:55:220
14620991157,15cyclictest276-21runrttasks09:20:420
14620991157,13cyclictest28941-21memory10:10:180
285221140,3chrt2850-21if_eth010:35:140
1589421140,3chrt15891-21grep07:15:010
14620991148,15cyclictest31278-21latency_hist10:20:020
14620991148,15cyclictest29215-21ntp_states08:05:220
14620991148,14cyclictest25189-21irqstats07:50:180
14620991148,13cyclictest23454-21df_inode11:55:130
14620991147,14cyclictest26408-21fw_packets07:55:140
146209911410,14cyclictest16006-21/usr/sbin/munin11:25:250
146209911410,13cyclictest19861-21latency_hist07:30:020
14620991139,17cyclictest17270-21runrttasks07:20:020
14620991139,16cyclictest15134-21users09:15:290
14620991139,14cyclictest20074-21memory07:30:170
14620991138,17cyclictest26472-21ntp_states10:00:240
14620991138,15cyclictest17912-21users07:20:300
14620991138,14cyclictest554-21runrttasks08:20:180
14620991138,14cyclictest2770-21seq08:29:540
14620991138,14cyclictest1553-21ntp_states12:35:210
146209911328,74cyclictest21515-21/usr/sbin/munin07:35:260
146209911327,74cyclictest12112-21/usr/sbin/munin11:10:250
14620991127,17cyclictest24051-21grep09:50:260
14620991127,14cyclictest22442-21open_inodes11:50:250
14620991126,14cyclictest6106-21users08:40:300
146209911223,14cyclictest31961-21vmstat10:20:300
146209911218,14cyclictest9402-21/usr/sbin/munin11:00:190
1710321110,4sleep016955-21/usr/sbin/munin11:30:180
14620991118,14cyclictest7386-21users08:45:300
14620991118,13cyclictest5540-21sed10:45:180
14620991118,13cyclictest22667-21memory07:40:180
14620991116,12cyclictest194732sleep009:34:100
14620991109,15cyclictest21022-21grep09:40:110
14620991108,20cyclictest6617-21/usr/sbin/munin10:50:290
14620991107,15cyclictest14660-21ntp_kernel_pll_11:20:210
14620991106,16cyclictest8369-21mailstats10:55:300
146209911011,18cyclictest13314-21df_inode09:10:120
146209911010,16cyclictest3207-21ntp_states08:30:230
14620991098,18cyclictest30210-21/usr/sbin/munin08:10:240
146209910911,17cyclictest32625-21runrttasks08:19:480
14620991088,17cyclictest27910-21ntpq08:00:200
14620991088,14cyclictest20882-21df11:45:110
14620991079,15cyclictest4256-21df_inode08:35:120
146209910710,15cyclictest32636-21memory12:30:200
14620991037,14cyclictest14659-21cat07:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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