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2026-09-08 - 19:56

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 792 highest latencies:
System rack4slot6s.osadl.org (updated Tue Sep 08, 2026 12:44:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1519522630,3sleep015197-21latency09:30:180
2698922490,2sleep026991-21latency08:10:180
1489721260,3chrt14893-21cpu11:35:120
1224121250,3chrt12159-21latency_hist11:25:030
1006921200,3sleep010071-21ls09:10:180
3041721180,3chrt30418-21/usr/sbin/munin12:35:140
124821150,3chrt1251-21cut08:35:270
1382821040,4sleep013831-21latency_hist07:20:020
45902980,3sleep04633-21if_eth010:55:150
180262915,10sleep018074-21/usr/sbin/munin09:40:280
50432896,11sleep05108-21systemctl08:50:240
280182896,10sleep028022-21sh10:20:120
136172887,67sleep013620-21df11:30:120
217962860,3sleep021835-21processes09:55:250
252282840,4sleep025241-21latency_hist10:10:000
116362830,4sleep011682-21ps07:10:240
232032790,2sleep023202-21ntp_kernel_pll_07:55:210
1028827520,32sleep010315-21ntp_states07:05:190
319652705,51sleep032006-21memory10:35:210
215552690,2sleep021550-21latency_hist07:50:010
322532660,3sleep032254-21ntpq08:30:190
222462667,46sleep0288-21snmpd12:03:080
289122624,6sleep00-21swapper08:17:040
11235996134,16cyclictest2357-21/usr/sbin/munin08:40:210
11235996121,13cyclictest16324-21/usr/sbin/munin09:35:160
1123599608,18cyclictest20197-21/usr/sbin/munin09:50:290
11235996036,15cyclictest6038-21/usr/sbin/munin11:00:210
11235996035,16cyclictest7534-21/usr/sbin/munin09:00:190
11235996035,16cyclictest22925-21/usr/sbin/munin12:05:250
1123599599,17cyclictest30412-21munin-run10:30:000
1123599599,17cyclictest18723-21/usr/sbin/munin11:50:150
1123599598,18cyclictest26489-21/usr/sbin/munin12:20:190
1123599598,15cyclictest21802-21irqstats07:50:150
1123599597,21cyclictest288-21snmpd07:24:340
11235995933,16cyclictest26713-21/usr/sbin/munin10:15:150
11235995933,16cyclictest24335-21/usr/sbin/munin08:00:140
11235995933,16cyclictest19399-21/usr/sbin/munin07:40:240
11235995911,16cyclictest661-21/usr/sbin/munin10:40:160
1123599589,16cyclictest24076-21memory12:10:170
1123599588,16cyclictest13755-21/usr/sbin/munin09:25:250
1123599587,18cyclictest22787-21/usr/sbin/munin10:00:180
1123599587,17cyclictest8556-21sed11:10:160
11235995831,17cyclictest4461-21runrttasks08:49:120
1123599579,16cyclictest11151-21/usr/sbin/munin09:15:260
1123599578,17cyclictest16627-21cut11:40:270
1123599578,16cyclictest30710-21/usr/sbin/munin08:25:150
1123599578,14cyclictest29431-21/usr/sbin/munin08:20:280
1123599577,18cyclictest29054-21/usr/sbin/munin12:30:270
11235995732,16cyclictest18010-21/usr/sbin/munin11:45:290
11235995719,14cyclictest20498-21switchtime11:55:270
1123599569,17cyclictest9735-21df_inode11:15:130
1123599569,17cyclictest17869-21sort07:35:140
1123599569,15cyclictest307-21munin-node10:10:150
11235995633,15cyclictest17074-21/usr/sbin/munin07:30:310
11235995630,16cyclictest12413-21/usr/sbin/munin11:25:150
11235995620,12cyclictest0-21swapper12:19:110
11235995532,16cyclictest9209-21runrttasks09:05:420
11235995532,15cyclictest2205-21/usr/sbin/munin10:45:190
11235995531,16cyclictest30622-21/usr/sbin/munin10:30:170
11235995530,16cyclictest6109-21/usr/sbin/munin08:55:130
11235995530,16cyclictest19851-21runrttasks09:48:160
11235995510,17cyclictest25686-21irqstats08:05:170
1123599547,15cyclictest288-21snmpd11:05:190
1123599547,14cyclictest12476-21/usr/sbin/munin09:20:160
11235995432,16cyclictest3494-21runrttasks10:50:210
11235995411,17cyclictest27982-21sed12:25:190
11235995316,13cyclictest152042chrt07:25:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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